hs: Change trunnel prop224 cell's namespace

One of the goals of this change is to have trunnel API/ABI being more explicit
so we namespace them with "trn_*". Furthermore, we can now create
hs_cells.[ch] without having to confuse it with trunnel which used to be
"hs_cell_*" before that change.

Here are the perl line that were used for this rename:

  perl -i -pe 's/cell_extension/trn_cell_extension/g;' src/*/*.[ch]
  perl -i -pe 's/cell_extension/trn_cell_extension/g;' src/trunnel/hs/*.trunnel
  perl -i -pe 's/hs_cell_/trn_cell_/g;' src/*/*.[ch]
  perl -i -pe 's/hs_cell_/trn_cell_/g;' src/trunnel/hs/*.trunnel

  And then "./scripts/codegen/run_trunnel.sh" with trunnel commit id
  613fb1b98e58504e2b84ef56b1602b6380629043.

Fixes #21919

Signed-off-by: David Goulet <dgoulet@torproject.org>

9 files changed, 858 insertions, 851 deletions

diff --git a/src/trunnel/hs/cell_common.c b/src/trunnel/hs/cell_common.c
index 830f2260ee..b7f19ffc60 100644
--- a/src/trunnel/hs/cell_common.c
+++ b/src/trunnel/hs/cell_common.c
@@ -28,10 +28,10 @@ int cellcommon_deadcode_dummy__ = 0;
     }                                                            \
   } while (0)
 
-cell_extension_fields_t *
-cell_extension_fields_new(void)
+trn_cell_extension_fields_t *
+trn_cell_extension_fields_new(void)
 {
-  cell_extension_fields_t *val = trunnel_calloc(1, sizeof(cell_extension_fields_t));
+  trn_cell_extension_fields_t *val = trunnel_calloc(1, sizeof(trn_cell_extension_fields_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -40,7 +40,7 @@ cell_extension_fields_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-cell_extension_fields_clear(cell_extension_fields_t *obj)
+trn_cell_extension_fields_clear(trn_cell_extension_fields_t *obj)
 {
   (void) obj;
   TRUNNEL_DYNARRAY_WIPE(&obj->field);
@@ -48,62 +48,62 @@ cell_extension_fields_clear(cell_extension_fields_t *obj)
 }
 
 void
-cell_extension_fields_free(cell_extension_fields_t *obj)
+trn_cell_extension_fields_free(trn_cell_extension_fields_t *obj)
 {
   if (obj == NULL)
     return;
-  cell_extension_fields_clear(obj);
-  trunnel_memwipe(obj, sizeof(cell_extension_fields_t));
+  trn_cell_extension_fields_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_extension_fields_t));
   trunnel_free_(obj);
 }
 
 uint8_t
-cell_extension_fields_get_field_type(const cell_extension_fields_t *inp)
+trn_cell_extension_fields_get_field_type(const trn_cell_extension_fields_t *inp)
 {
   return inp->field_type;
 }
 int
-cell_extension_fields_set_field_type(cell_extension_fields_t *inp, uint8_t val)
+trn_cell_extension_fields_set_field_type(trn_cell_extension_fields_t *inp, uint8_t val)
 {
   inp->field_type = val;
   return 0;
 }
 uint8_t
-cell_extension_fields_get_field_len(const cell_extension_fields_t *inp)
+trn_cell_extension_fields_get_field_len(const trn_cell_extension_fields_t *inp)
 {
   return inp->field_len;
 }
 int
-cell_extension_fields_set_field_len(cell_extension_fields_t *inp, uint8_t val)
+trn_cell_extension_fields_set_field_len(trn_cell_extension_fields_t *inp, uint8_t val)
 {
   inp->field_len = val;
   return 0;
 }
 size_t
-cell_extension_fields_getlen_field(const cell_extension_fields_t *inp)
+trn_cell_extension_fields_getlen_field(const trn_cell_extension_fields_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->field);
 }
 
 uint8_t
-cell_extension_fields_get_field(cell_extension_fields_t *inp, size_t idx)
+trn_cell_extension_fields_get_field(trn_cell_extension_fields_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->field, idx);
 }
 
 uint8_t
-cell_extension_fields_getconst_field(const cell_extension_fields_t *inp, size_t idx)
+trn_cell_extension_fields_getconst_field(const trn_cell_extension_fields_t *inp, size_t idx)
 {
-  return cell_extension_fields_get_field((cell_extension_fields_t*)inp, idx);
+  return trn_cell_extension_fields_get_field((trn_cell_extension_fields_t*)inp, idx);
 }
 int
-cell_extension_fields_set_field(cell_extension_fields_t *inp, size_t idx, uint8_t elt)
+trn_cell_extension_fields_set_field(trn_cell_extension_fields_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->field, idx, elt);
   return 0;
 }
 int
-cell_extension_fields_add_field(cell_extension_fields_t *inp, uint8_t elt)
+trn_cell_extension_fields_add_field(trn_cell_extension_fields_t *inp, uint8_t elt)
 {
 #if SIZE_MAX >= UINT8_MAX
   if (inp->field.n_ == UINT8_MAX)
@@ -117,17 +117,17 @@ cell_extension_fields_add_field(cell_extension_fields_t *inp, uint8_t elt)
 }
 
 uint8_t *
-cell_extension_fields_getarray_field(cell_extension_fields_t *inp)
+trn_cell_extension_fields_getarray_field(trn_cell_extension_fields_t *inp)
 {
   return inp->field.elts_;
 }
 const uint8_t  *
-cell_extension_fields_getconstarray_field(const cell_extension_fields_t *inp)
+trn_cell_extension_fields_getconstarray_field(const trn_cell_extension_fields_t *inp)
 {
-  return (const uint8_t  *)cell_extension_fields_getarray_field((cell_extension_fields_t*)inp);
+  return (const uint8_t  *)trn_cell_extension_fields_getarray_field((trn_cell_extension_fields_t*)inp);
 }
 int
-cell_extension_fields_setlen_field(cell_extension_fields_t *inp, size_t newlen)
+trn_cell_extension_fields_setlen_field(trn_cell_extension_fields_t *inp, size_t newlen)
 {
   uint8_t *newptr;
 #if UINT8_MAX < SIZE_MAX
@@ -147,7 +147,7 @@ cell_extension_fields_setlen_field(cell_extension_fields_t *inp, size_t newlen)
   return -1;
 }
 const char *
-cell_extension_fields_check(const cell_extension_fields_t *obj)
+trn_cell_extension_fields_check(const trn_cell_extension_fields_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -159,11 +159,11 @@ cell_extension_fields_check(const cell_extension_fields_t *obj)
 }
 
 ssize_t
-cell_extension_fields_encoded_len(const cell_extension_fields_t *obj)
+trn_cell_extension_fields_encoded_len(const trn_cell_extension_fields_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != cell_extension_fields_check(obj))
+  if (NULL != trn_cell_extension_fields_check(obj))
      return -1;
 
 
@@ -178,24 +178,24 @@ cell_extension_fields_encoded_len(const cell_extension_fields_t *obj)
   return result;
 }
 int
-cell_extension_fields_clear_errors(cell_extension_fields_t *obj)
+trn_cell_extension_fields_clear_errors(trn_cell_extension_fields_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-cell_extension_fields_encode(uint8_t *output, const size_t avail, const cell_extension_fields_t *obj)
+trn_cell_extension_fields_encode(uint8_t *output, const size_t avail, const trn_cell_extension_fields_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = cell_extension_fields_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_extension_fields_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = cell_extension_fields_check(obj)))
+  if (NULL != (msg = trn_cell_extension_fields_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -252,11 +252,11 @@ cell_extension_fields_encode(uint8_t *output, const size_t avail, const cell_ext
   return result;
 }
 
-/** As cell_extension_fields_parse(), but do not allocate the output
- * object.
+/** As trn_cell_extension_fields_parse(), but do not allocate the
+ * output object.
  */
 static ssize_t
-cell_extension_fields_parse_into(cell_extension_fields_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_extension_fields_parse_into(trn_cell_extension_fields_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -290,23 +290,23 @@ cell_extension_fields_parse_into(cell_extension_fields_t *obj, const uint8_t *in
 }
 
 ssize_t
-cell_extension_fields_parse(cell_extension_fields_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_extension_fields_parse(trn_cell_extension_fields_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = cell_extension_fields_new();
+  *output = trn_cell_extension_fields_new();
   if (NULL == *output)
     return -1;
-  result = cell_extension_fields_parse_into(*output, input, len_in);
+  result = trn_cell_extension_fields_parse_into(*output, input, len_in);
   if (result < 0) {
-    cell_extension_fields_free(*output);
+    trn_cell_extension_fields_free(*output);
     *output = NULL;
   }
   return result;
 }
-cell_extension_t *
-cell_extension_new(void)
+trn_cell_extension_t *
+trn_cell_extension_new(void)
 {
-  cell_extension_t *val = trunnel_calloc(1, sizeof(cell_extension_t));
+  trn_cell_extension_t *val = trunnel_calloc(1, sizeof(trn_cell_extension_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -315,14 +315,14 @@ cell_extension_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-cell_extension_clear(cell_extension_t *obj)
+trn_cell_extension_clear(trn_cell_extension_t *obj)
 {
   (void) obj;
   {
 
     unsigned idx;
     for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->fields); ++idx) {
-      cell_extension_fields_free(TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
+      trn_cell_extension_fields_free(TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
     }
   }
   TRUNNEL_DYNARRAY_WIPE(&obj->fields);
@@ -330,92 +330,92 @@ cell_extension_clear(cell_extension_t *obj)
 }
 
 void
-cell_extension_free(cell_extension_t *obj)
+trn_cell_extension_free(trn_cell_extension_t *obj)
 {
   if (obj == NULL)
     return;
-  cell_extension_clear(obj);
-  trunnel_memwipe(obj, sizeof(cell_extension_t));
+  trn_cell_extension_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_extension_t));
   trunnel_free_(obj);
 }
 
 uint8_t
-cell_extension_get_num(const cell_extension_t *inp)
+trn_cell_extension_get_num(const trn_cell_extension_t *inp)
 {
   return inp->num;
 }
 int
-cell_extension_set_num(cell_extension_t *inp, uint8_t val)
+trn_cell_extension_set_num(trn_cell_extension_t *inp, uint8_t val)
 {
   inp->num = val;
   return 0;
 }
 size_t
-cell_extension_getlen_fields(const cell_extension_t *inp)
+trn_cell_extension_getlen_fields(const trn_cell_extension_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->fields);
 }
 
-struct cell_extension_fields_st *
-cell_extension_get_fields(cell_extension_t *inp, size_t idx)
+struct trn_cell_extension_fields_st *
+trn_cell_extension_get_fields(trn_cell_extension_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->fields, idx);
 }
 
- const struct cell_extension_fields_st *
-cell_extension_getconst_fields(const cell_extension_t *inp, size_t idx)
+ const struct trn_cell_extension_fields_st *
+trn_cell_extension_getconst_fields(const trn_cell_extension_t *inp, size_t idx)
 {
-  return cell_extension_get_fields((cell_extension_t*)inp, idx);
+  return trn_cell_extension_get_fields((trn_cell_extension_t*)inp, idx);
 }
 int
-cell_extension_set_fields(cell_extension_t *inp, size_t idx, struct cell_extension_fields_st * elt)
+trn_cell_extension_set_fields(trn_cell_extension_t *inp, size_t idx, struct trn_cell_extension_fields_st * elt)
 {
-  cell_extension_fields_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->fields, idx);
+  trn_cell_extension_fields_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->fields, idx);
   if (oldval && oldval != elt)
-    cell_extension_fields_free(oldval);
-  return cell_extension_set0_fields(inp, idx, elt);
+    trn_cell_extension_fields_free(oldval);
+  return trn_cell_extension_set0_fields(inp, idx, elt);
 }
 int
-cell_extension_set0_fields(cell_extension_t *inp, size_t idx, struct cell_extension_fields_st * elt)
+trn_cell_extension_set0_fields(trn_cell_extension_t *inp, size_t idx, struct trn_cell_extension_fields_st * elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->fields, idx, elt);
   return 0;
 }
 int
-cell_extension_add_fields(cell_extension_t *inp, struct cell_extension_fields_st * elt)
+trn_cell_extension_add_fields(trn_cell_extension_t *inp, struct trn_cell_extension_fields_st * elt)
 {
 #if SIZE_MAX >= UINT8_MAX
   if (inp->fields.n_ == UINT8_MAX)
     goto trunnel_alloc_failed;
 #endif
-  TRUNNEL_DYNARRAY_ADD(struct cell_extension_fields_st *, &inp->fields, elt, {});
+  TRUNNEL_DYNARRAY_ADD(struct trn_cell_extension_fields_st *, &inp->fields, elt, {});
   return 0;
  trunnel_alloc_failed:
   TRUNNEL_SET_ERROR_CODE(inp);
   return -1;
 }
 
-struct cell_extension_fields_st * *
-cell_extension_getarray_fields(cell_extension_t *inp)
+struct trn_cell_extension_fields_st * *
+trn_cell_extension_getarray_fields(trn_cell_extension_t *inp)
 {
   return inp->fields.elts_;
 }
-const struct cell_extension_fields_st *  const  *
-cell_extension_getconstarray_fields(const cell_extension_t *inp)
+const struct trn_cell_extension_fields_st *  const  *
+trn_cell_extension_getconstarray_fields(const trn_cell_extension_t *inp)
 {
-  return (const struct cell_extension_fields_st *  const  *)cell_extension_getarray_fields((cell_extension_t*)inp);
+  return (const struct trn_cell_extension_fields_st *  const  *)trn_cell_extension_getarray_fields((trn_cell_extension_t*)inp);
 }
 int
-cell_extension_setlen_fields(cell_extension_t *inp, size_t newlen)
+trn_cell_extension_setlen_fields(trn_cell_extension_t *inp, size_t newlen)
 {
-  struct cell_extension_fields_st * *newptr;
+  struct trn_cell_extension_fields_st * *newptr;
 #if UINT8_MAX < SIZE_MAX
   if (newlen > UINT8_MAX)
     goto trunnel_alloc_failed;
 #endif
   newptr = trunnel_dynarray_setlen(&inp->fields.allocated_,
                  &inp->fields.n_, inp->fields.elts_, newlen,
-                 sizeof(inp->fields.elts_[0]), (trunnel_free_fn_t) cell_extension_fields_free,
+                 sizeof(inp->fields.elts_[0]), (trunnel_free_fn_t) trn_cell_extension_fields_free,
                  &inp->trunnel_error_code_);
   if (newlen != 0 && newptr == NULL)
     goto trunnel_alloc_failed;
@@ -426,7 +426,7 @@ cell_extension_setlen_fields(cell_extension_t *inp, size_t newlen)
   return -1;
 }
 const char *
-cell_extension_check(const cell_extension_t *obj)
+trn_cell_extension_check(const trn_cell_extension_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -437,7 +437,7 @@ cell_extension_check(const cell_extension_t *obj)
 
     unsigned idx;
     for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->fields); ++idx) {
-      if (NULL != (msg = cell_extension_fields_check(TRUNNEL_DYNARRAY_GET(&obj->fields, idx))))
+      if (NULL != (msg = trn_cell_extension_fields_check(TRUNNEL_DYNARRAY_GET(&obj->fields, idx))))
         return msg;
     }
   }
@@ -447,46 +447,46 @@ cell_extension_check(const cell_extension_t *obj)
 }
 
 ssize_t
-cell_extension_encoded_len(const cell_extension_t *obj)
+trn_cell_extension_encoded_len(const trn_cell_extension_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != cell_extension_check(obj))
+  if (NULL != trn_cell_extension_check(obj))
      return -1;
 
 
   /* Length of u8 num */
   result += 1;
 
-  /* Length of struct cell_extension_fields fields[num] */
+  /* Length of struct trn_cell_extension_fields fields[num] */
   {
 
     unsigned idx;
     for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->fields); ++idx) {
-      result += cell_extension_fields_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
+      result += trn_cell_extension_fields_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
     }
   }
   return result;
 }
 int
-cell_extension_clear_errors(cell_extension_t *obj)
+trn_cell_extension_clear_errors(trn_cell_extension_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-cell_extension_encode(uint8_t *output, const size_t avail, const cell_extension_t *obj)
+trn_cell_extension_encode(uint8_t *output, const size_t avail, const trn_cell_extension_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = cell_extension_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_extension_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = cell_extension_check(obj)))
+  if (NULL != (msg = trn_cell_extension_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -500,13 +500,13 @@ cell_extension_encode(uint8_t *output, const size_t avail, const cell_extension_
   trunnel_set_uint8(ptr, (obj->num));
   written += 1; ptr += 1;
 
-  /* Encode struct cell_extension_fields fields[num] */
+  /* Encode struct trn_cell_extension_fields fields[num] */
   {
 
     unsigned idx;
     for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->fields); ++idx) {
       trunnel_assert(written <= avail);
-      result = cell_extension_fields_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
+      result = trn_cell_extension_fields_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->fields, idx));
       if (result < 0)
         goto fail; /* XXXXXXX !*/
       written += result; ptr += result;
@@ -537,10 +537,11 @@ cell_extension_encode(uint8_t *output, const size_t avail, const cell_extension_
   return result;
 }
 
-/** As cell_extension_parse(), but do not allocate the output object.
+/** As trn_cell_extension_parse(), but do not allocate the output
+ * object.
  */
 static ssize_t
-cell_extension_parse_into(cell_extension_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_extension_parse_into(trn_cell_extension_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -552,18 +553,18 @@ cell_extension_parse_into(cell_extension_t *obj, const uint8_t *input, const siz
   obj->num = (trunnel_get_uint8(ptr));
   remaining -= 1; ptr += 1;
 
-  /* Parse struct cell_extension_fields fields[num] */
-  TRUNNEL_DYNARRAY_EXPAND(cell_extension_fields_t *, &obj->fields, obj->num, {});
+  /* Parse struct trn_cell_extension_fields fields[num] */
+  TRUNNEL_DYNARRAY_EXPAND(trn_cell_extension_fields_t *, &obj->fields, obj->num, {});
   {
-    cell_extension_fields_t * elt;
+    trn_cell_extension_fields_t * elt;
     unsigned idx;
     for (idx = 0; idx < obj->num; ++idx) {
-      result = cell_extension_fields_parse(&elt, ptr, remaining);
+      result = trn_cell_extension_fields_parse(&elt, ptr, remaining);
       if (result < 0)
         goto relay_fail;
       trunnel_assert((size_t)result <= remaining);
       remaining -= result; ptr += result;
-      TRUNNEL_DYNARRAY_ADD(cell_extension_fields_t *, &obj->fields, elt, {cell_extension_fields_free(elt);});
+      TRUNNEL_DYNARRAY_ADD(trn_cell_extension_fields_t *, &obj->fields, elt, {trn_cell_extension_fields_free(elt);});
     }
   }
   trunnel_assert(ptr + remaining == input + len_in);
@@ -579,15 +580,15 @@ cell_extension_parse_into(cell_extension_t *obj, const uint8_t *input, const siz
 }
 
 ssize_t
-cell_extension_parse(cell_extension_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_extension_parse(trn_cell_extension_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = cell_extension_new();
+  *output = trn_cell_extension_new();
   if (NULL == *output)
     return -1;
-  result = cell_extension_parse_into(*output, input, len_in);
+  result = trn_cell_extension_parse_into(*output, input, len_in);
   if (result < 0) {
-    cell_extension_free(*output);
+    trn_cell_extension_free(*output);
     *output = NULL;
   }
   return result;
diff --git a/src/trunnel/hs/cell_common.h b/src/trunnel/hs/cell_common.h
index 8999f7da40..4d98a54cf4 100644
--- a/src/trunnel/hs/cell_common.h
+++ b/src/trunnel/hs/cell_common.h
@@ -8,191 +8,196 @@
 #include <stdint.h>
 #include "trunnel.h"
 
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_CELL_EXTENSION_FIELDS)
-struct cell_extension_fields_st {
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_EXTENSION_FIELDS)
+struct trn_cell_extension_fields_st {
   uint8_t field_type;
   uint8_t field_len;
   TRUNNEL_DYNARRAY_HEAD(, uint8_t) field;
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct cell_extension_fields_st cell_extension_fields_t;
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_CELL_EXTENSION)
-struct cell_extension_st {
+typedef struct trn_cell_extension_fields_st trn_cell_extension_fields_t;
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_EXTENSION)
+struct trn_cell_extension_st {
   uint8_t num;
-  TRUNNEL_DYNARRAY_HEAD(, struct cell_extension_fields_st *) fields;
+  TRUNNEL_DYNARRAY_HEAD(, struct trn_cell_extension_fields_st *) fields;
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct cell_extension_st cell_extension_t;
-/** Return a newly allocated cell_extension_fields with all elements
- * set to zero.
- */
-cell_extension_fields_t *cell_extension_fields_new(void);
-/** Release all storage held by the cell_extension_fields in 'victim'.
- * (Do nothing if 'victim' is NULL.)
- */
-void cell_extension_fields_free(cell_extension_fields_t *victim);
-/** Try to parse a cell_extension_fields from the buffer in 'input',
- * using up to 'len_in' bytes from the input buffer. On success,
- * return the number of bytes consumed and set *output to the newly
- * allocated cell_extension_fields_t. On failure, return -2 if the
- * input appears truncated, and -1 if the input is otherwise invalid.
- */
-ssize_t cell_extension_fields_parse(cell_extension_fields_t **output, const uint8_t *input, const size_t len_in);
+typedef struct trn_cell_extension_st trn_cell_extension_t;
+/** Return a newly allocated trn_cell_extension_fields with all
+ * elements set to zero.
+ */
+trn_cell_extension_fields_t *trn_cell_extension_fields_new(void);
+/** Release all storage held by the trn_cell_extension_fields in
+ * 'victim'. (Do nothing if 'victim' is NULL.)
+ */
+void trn_cell_extension_fields_free(trn_cell_extension_fields_t *victim);
+/** Try to parse a trn_cell_extension_fields from the buffer in
+ * 'input', using up to 'len_in' bytes from the input buffer. On
+ * success, return the number of bytes consumed and set *output to the
+ * newly allocated trn_cell_extension_fields_t. On failure, return -2
+ * if the input appears truncated, and -1 if the input is otherwise
+ * invalid.
+ */
+ssize_t trn_cell_extension_fields_parse(trn_cell_extension_fields_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * cell_extension_fields in 'obj'. On failure, return a negative
+ * trn_cell_extension_fields in 'obj'. On failure, return a negative
  * value. Note that this value may be an overestimate, and can even be
  * an underestimate for certain unencodeable objects.
  */
-ssize_t cell_extension_fields_encoded_len(const cell_extension_fields_t *obj);
-/** Try to encode the cell_extension_fields from 'input' into the
+ssize_t trn_cell_extension_fields_encoded_len(const trn_cell_extension_fields_t *obj);
+/** Try to encode the trn_cell_extension_fields from 'input' into the
  * buffer at 'output', using up to 'avail' bytes of the output buffer.
  * On success, return the number of bytes used. On failure, return -2
  * if the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t cell_extension_fields_encode(uint8_t *output, size_t avail, const cell_extension_fields_t *input);
-/** Check whether the internal state of the cell_extension_fields in
- * 'obj' is consistent. Return NULL if it is, and a short message if
- * it is not.
+ssize_t trn_cell_extension_fields_encode(uint8_t *output, size_t avail, const trn_cell_extension_fields_t *input);
+/** Check whether the internal state of the trn_cell_extension_fields
+ * in 'obj' is consistent. Return NULL if it is, and a short message
+ * if it is not.
  */
-const char *cell_extension_fields_check(const cell_extension_fields_t *obj);
+const char *trn_cell_extension_fields_check(const trn_cell_extension_fields_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int cell_extension_fields_clear_errors(cell_extension_fields_t *obj);
+int trn_cell_extension_fields_clear_errors(trn_cell_extension_fields_t *obj);
 /** Return the value of the field_type field of the
- * cell_extension_fields_t in 'inp'
+ * trn_cell_extension_fields_t in 'inp'
  */
-uint8_t cell_extension_fields_get_field_type(const cell_extension_fields_t *inp);
+uint8_t trn_cell_extension_fields_get_field_type(const trn_cell_extension_fields_t *inp);
 /** Set the value of the field_type field of the
- * cell_extension_fields_t in 'inp' to 'val'. Return 0 on success;
+ * trn_cell_extension_fields_t in 'inp' to 'val'. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int cell_extension_fields_set_field_type(cell_extension_fields_t *inp, uint8_t val);
+int trn_cell_extension_fields_set_field_type(trn_cell_extension_fields_t *inp, uint8_t val);
 /** Return the value of the field_len field of the
- * cell_extension_fields_t in 'inp'
+ * trn_cell_extension_fields_t in 'inp'
  */
-uint8_t cell_extension_fields_get_field_len(const cell_extension_fields_t *inp);
+uint8_t trn_cell_extension_fields_get_field_len(const trn_cell_extension_fields_t *inp);
 /** Set the value of the field_len field of the
- * cell_extension_fields_t in 'inp' to 'val'. Return 0 on success;
+ * trn_cell_extension_fields_t in 'inp' to 'val'. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int cell_extension_fields_set_field_len(cell_extension_fields_t *inp, uint8_t val);
+int trn_cell_extension_fields_set_field_len(trn_cell_extension_fields_t *inp, uint8_t val);
 /** Return the length of the dynamic array holding the field field of
- * the cell_extension_fields_t in 'inp'.
+ * the trn_cell_extension_fields_t in 'inp'.
  */
-size_t cell_extension_fields_getlen_field(const cell_extension_fields_t *inp);
+size_t trn_cell_extension_fields_getlen_field(const trn_cell_extension_fields_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * field of the cell_extension_fields_t in 'inp'.
+ * field of the trn_cell_extension_fields_t in 'inp'.
  */
-uint8_t cell_extension_fields_get_field(cell_extension_fields_t *inp, size_t idx);
-/** As cell_extension_fields_get_field, but take and return a const
- * pointer
+uint8_t trn_cell_extension_fields_get_field(trn_cell_extension_fields_t *inp, size_t idx);
+/** As trn_cell_extension_fields_get_field, but take and return a
+ * const pointer
  */
-uint8_t cell_extension_fields_getconst_field(const cell_extension_fields_t *inp, size_t idx);
+uint8_t trn_cell_extension_fields_getconst_field(const trn_cell_extension_fields_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * field of the cell_extension_fields_t in 'inp', so that it will hold
- * the value 'elt'.
+ * field of the trn_cell_extension_fields_t in 'inp', so that it will
+ * hold the value 'elt'.
  */
-int cell_extension_fields_set_field(cell_extension_fields_t *inp, size_t idx, uint8_t elt);
+int trn_cell_extension_fields_set_field(trn_cell_extension_fields_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field field of the
- * cell_extension_fields_t in 'inp'.
+ * trn_cell_extension_fields_t in 'inp'.
  */
-int cell_extension_fields_add_field(cell_extension_fields_t *inp, uint8_t elt);
+int trn_cell_extension_fields_add_field(trn_cell_extension_fields_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field field of
  * 'inp'.
  */
-uint8_t * cell_extension_fields_getarray_field(cell_extension_fields_t *inp);
-/** As cell_extension_fields_get_field, but take and return a const
- * pointer
+uint8_t * trn_cell_extension_fields_getarray_field(trn_cell_extension_fields_t *inp);
+/** As trn_cell_extension_fields_get_field, but take and return a
+ * const pointer
  */
-const uint8_t  * cell_extension_fields_getconstarray_field(const cell_extension_fields_t *inp);
+const uint8_t  * trn_cell_extension_fields_getconstarray_field(const trn_cell_extension_fields_t *inp);
 /** Change the length of the variable-length array field field of
  * 'inp' to 'newlen'.Fill extra elements with 0. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int cell_extension_fields_setlen_field(cell_extension_fields_t *inp, size_t newlen);
-/** Return a newly allocated cell_extension with all elements set to
- * zero.
+int trn_cell_extension_fields_setlen_field(trn_cell_extension_fields_t *inp, size_t newlen);
+/** Return a newly allocated trn_cell_extension with all elements set
+ * to zero.
  */
-cell_extension_t *cell_extension_new(void);
-/** Release all storage held by the cell_extension in 'victim'. (Do
- * nothing if 'victim' is NULL.)
+trn_cell_extension_t *trn_cell_extension_new(void);
+/** Release all storage held by the trn_cell_extension in 'victim'.
+ * (Do nothing if 'victim' is NULL.)
  */
-void cell_extension_free(cell_extension_t *victim);
-/** Try to parse a cell_extension from the buffer in 'input', using up
- * to 'len_in' bytes from the input buffer. On success, return the
- * number of bytes consumed and set *output to the newly allocated
- * cell_extension_t. On failure, return -2 if the input appears
- * truncated, and -1 if the input is otherwise invalid.
+void trn_cell_extension_free(trn_cell_extension_t *victim);
+/** Try to parse a trn_cell_extension from the buffer in 'input',
+ * using up to 'len_in' bytes from the input buffer. On success,
+ * return the number of bytes consumed and set *output to the newly
+ * allocated trn_cell_extension_t. On failure, return -2 if the input
+ * appears truncated, and -1 if the input is otherwise invalid.
  */
-ssize_t cell_extension_parse(cell_extension_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_extension_parse(trn_cell_extension_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * cell_extension in 'obj'. On failure, return a negative value. Note
- * that this value may be an overestimate, and can even be an
+ * trn_cell_extension in 'obj'. On failure, return a negative value.
+ * Note that this value may be an overestimate, and can even be an
  * underestimate for certain unencodeable objects.
  */
-ssize_t cell_extension_encoded_len(const cell_extension_t *obj);
-/** Try to encode the cell_extension from 'input' into the buffer at
- * 'output', using up to 'avail' bytes of the output buffer. On
+ssize_t trn_cell_extension_encoded_len(const trn_cell_extension_t *obj);
+/** Try to encode the trn_cell_extension from 'input' into the buffer
+ * at 'output', using up to 'avail' bytes of the output buffer. On
  * success, return the number of bytes used. On failure, return -2 if
  * the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t cell_extension_encode(uint8_t *output, size_t avail, const cell_extension_t *input);
-/** Check whether the internal state of the cell_extension in 'obj' is
- * consistent. Return NULL if it is, and a short message if it is not.
+ssize_t trn_cell_extension_encode(uint8_t *output, size_t avail, const trn_cell_extension_t *input);
+/** Check whether the internal state of the trn_cell_extension in
+ * 'obj' is consistent. Return NULL if it is, and a short message if
+ * it is not.
  */
-const char *cell_extension_check(const cell_extension_t *obj);
+const char *trn_cell_extension_check(const trn_cell_extension_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int cell_extension_clear_errors(cell_extension_t *obj);
-/** Return the value of the num field of the cell_extension_t in 'inp'
+int trn_cell_extension_clear_errors(trn_cell_extension_t *obj);
+/** Return the value of the num field of the trn_cell_extension_t in
+ * 'inp'
  */
-uint8_t cell_extension_get_num(const cell_extension_t *inp);
-/** Set the value of the num field of the cell_extension_t in 'inp' to
- * 'val'. Return 0 on success; return -1 and set the error code on
- * 'inp' on failure.
+uint8_t trn_cell_extension_get_num(const trn_cell_extension_t *inp);
+/** Set the value of the num field of the trn_cell_extension_t in
+ * 'inp' to 'val'. Return 0 on success; return -1 and set the error
+ * code on 'inp' on failure.
  */
-int cell_extension_set_num(cell_extension_t *inp, uint8_t val);
+int trn_cell_extension_set_num(trn_cell_extension_t *inp, uint8_t val);
 /** Return the length of the dynamic array holding the fields field of
- * the cell_extension_t in 'inp'.
+ * the trn_cell_extension_t in 'inp'.
  */
-size_t cell_extension_getlen_fields(const cell_extension_t *inp);
+size_t trn_cell_extension_getlen_fields(const trn_cell_extension_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * fields of the cell_extension_t in 'inp'.
+ * fields of the trn_cell_extension_t in 'inp'.
  */
-struct cell_extension_fields_st * cell_extension_get_fields(cell_extension_t *inp, size_t idx);
-/** As cell_extension_get_fields, but take and return a const pointer
+struct trn_cell_extension_fields_st * trn_cell_extension_get_fields(trn_cell_extension_t *inp, size_t idx);
+/** As trn_cell_extension_get_fields, but take and return a const
+ * pointer
  */
- const struct cell_extension_fields_st * cell_extension_getconst_fields(const cell_extension_t *inp, size_t idx);
+ const struct trn_cell_extension_fields_st * trn_cell_extension_getconst_fields(const trn_cell_extension_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * fields of the cell_extension_t in 'inp', so that it will hold the
- * value 'elt'. Free the previous value, if any.
+ * fields of the trn_cell_extension_t in 'inp', so that it will hold
+ * the value 'elt'. Free the previous value, if any.
  */
-int cell_extension_set_fields(cell_extension_t *inp, size_t idx, struct cell_extension_fields_st * elt);
-/** As cell_extension_set_fields, but does not free the previous
+int trn_cell_extension_set_fields(trn_cell_extension_t *inp, size_t idx, struct trn_cell_extension_fields_st * elt);
+/** As trn_cell_extension_set_fields, but does not free the previous
  * value.
  */
-int cell_extension_set0_fields(cell_extension_t *inp, size_t idx, struct cell_extension_fields_st * elt);
+int trn_cell_extension_set0_fields(trn_cell_extension_t *inp, size_t idx, struct trn_cell_extension_fields_st * elt);
 /** Append a new element 'elt' to the dynamic array field fields of
- * the cell_extension_t in 'inp'.
+ * the trn_cell_extension_t in 'inp'.
  */
-int cell_extension_add_fields(cell_extension_t *inp, struct cell_extension_fields_st * elt);
+int trn_cell_extension_add_fields(trn_cell_extension_t *inp, struct trn_cell_extension_fields_st * elt);
 /** Return a pointer to the variable-length array field fields of
  * 'inp'.
  */
-struct cell_extension_fields_st * * cell_extension_getarray_fields(cell_extension_t *inp);
-/** As cell_extension_get_fields, but take and return a const pointer
+struct trn_cell_extension_fields_st * * trn_cell_extension_getarray_fields(trn_cell_extension_t *inp);
+/** As trn_cell_extension_get_fields, but take and return a const
+ * pointer
  */
-const struct cell_extension_fields_st *  const  * cell_extension_getconstarray_fields(const cell_extension_t *inp);
+const struct trn_cell_extension_fields_st *  const  * trn_cell_extension_getconstarray_fields(const trn_cell_extension_t *inp);
 /** Change the length of the variable-length array field fields of
  * 'inp' to 'newlen'.Fill extra elements with NULL; free removed
  * elements. Return 0 on success; return -1 and set the error code on
  * 'inp' on failure.
  */
-int cell_extension_setlen_fields(cell_extension_t *inp, size_t newlen);
+int trn_cell_extension_setlen_fields(trn_cell_extension_t *inp, size_t newlen);
 
 
 #endif
diff --git a/src/trunnel/hs/cell_common.trunnel b/src/trunnel/hs/cell_common.trunnel
index 1bbec5a1fe..1aa6999de7 100644
--- a/src/trunnel/hs/cell_common.trunnel
+++ b/src/trunnel/hs/cell_common.trunnel
@@ -1,12 +1,12 @@
 /* This file contains common data structure that cells use. */
 
-struct cell_extension_fields {
+struct trn_cell_extension_fields {
   u8 field_type;
   u8 field_len;
   u8 field[field_len];
 };
 
-struct cell_extension {
+struct trn_cell_extension {
   u8 num;
-  struct cell_extension_fields fields[num];
+  struct trn_cell_extension_fields fields[num];
 };
diff --git a/src/trunnel/hs/cell_establish_intro.c b/src/trunnel/hs/cell_establish_intro.c
index 633bd7c214..22e198c369 100644
--- a/src/trunnel/hs/cell_establish_intro.c
+++ b/src/trunnel/hs/cell_establish_intro.c
@@ -28,18 +28,18 @@ int cellestablishintro_deadcode_dummy__ = 0;
     }                                                            \
   } while (0)
 
-typedef struct cell_extension_st cell_extension_t;
-cell_extension_t *cell_extension_new(void);
-void cell_extension_free(cell_extension_t *victim);
-ssize_t cell_extension_parse(cell_extension_t **output, const uint8_t *input, const size_t len_in);
-ssize_t cell_extension_encoded_len(const cell_extension_t *obj);
-ssize_t cell_extension_encode(uint8_t *output, size_t avail, const cell_extension_t *input);
-const char *cell_extension_check(const cell_extension_t *obj);
-int cell_extension_clear_errors(cell_extension_t *obj);
-hs_cell_establish_intro_t *
-hs_cell_establish_intro_new(void)
-{
-  hs_cell_establish_intro_t *val = trunnel_calloc(1, sizeof(hs_cell_establish_intro_t));
+typedef struct trn_cell_extension_st trn_cell_extension_t;
+trn_cell_extension_t *trn_cell_extension_new(void);
+void trn_cell_extension_free(trn_cell_extension_t *victim);
+ssize_t trn_cell_extension_parse(trn_cell_extension_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_extension_encoded_len(const trn_cell_extension_t *obj);
+ssize_t trn_cell_extension_encode(uint8_t *output, size_t avail, const trn_cell_extension_t *input);
+const char *trn_cell_extension_check(const trn_cell_extension_t *obj);
+int trn_cell_extension_clear_errors(trn_cell_extension_t *obj);
+trn_cell_establish_intro_t *
+trn_cell_establish_intro_new(void)
+{
+  trn_cell_establish_intro_t *val = trunnel_calloc(1, sizeof(trn_cell_establish_intro_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -48,39 +48,39 @@ hs_cell_establish_intro_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-hs_cell_establish_intro_clear(hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_clear(trn_cell_establish_intro_t *obj)
 {
   (void) obj;
   TRUNNEL_DYNARRAY_WIPE(&obj->auth_key);
   TRUNNEL_DYNARRAY_CLEAR(&obj->auth_key);
-  cell_extension_free(obj->extensions);
+  trn_cell_extension_free(obj->extensions);
   obj->extensions = NULL;
   TRUNNEL_DYNARRAY_WIPE(&obj->sig);
   TRUNNEL_DYNARRAY_CLEAR(&obj->sig);
 }
 
 void
-hs_cell_establish_intro_free(hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_free(trn_cell_establish_intro_t *obj)
 {
   if (obj == NULL)
     return;
-  hs_cell_establish_intro_clear(obj);
-  trunnel_memwipe(obj, sizeof(hs_cell_establish_intro_t));
+  trn_cell_establish_intro_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_establish_intro_t));
   trunnel_free_(obj);
 }
 
 const uint8_t *
-hs_cell_establish_intro_get_start_cell(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_start_cell(const trn_cell_establish_intro_t *inp)
 {
   return inp->start_cell;
 }
 uint8_t
-hs_cell_establish_intro_get_auth_key_type(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_auth_key_type(const trn_cell_establish_intro_t *inp)
 {
   return inp->auth_key_type;
 }
 int
-hs_cell_establish_intro_set_auth_key_type(hs_cell_establish_intro_t *inp, uint8_t val)
+trn_cell_establish_intro_set_auth_key_type(trn_cell_establish_intro_t *inp, uint8_t val)
 {
   if (! ((val == 0 || val == 1 || val == 2))) {
      TRUNNEL_SET_ERROR_CODE(inp);
@@ -90,41 +90,41 @@ hs_cell_establish_intro_set_auth_key_type(hs_cell_establish_intro_t *inp, uint8_
   return 0;
 }
 uint16_t
-hs_cell_establish_intro_get_auth_key_len(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_auth_key_len(const trn_cell_establish_intro_t *inp)
 {
   return inp->auth_key_len;
 }
 int
-hs_cell_establish_intro_set_auth_key_len(hs_cell_establish_intro_t *inp, uint16_t val)
+trn_cell_establish_intro_set_auth_key_len(trn_cell_establish_intro_t *inp, uint16_t val)
 {
   inp->auth_key_len = val;
   return 0;
 }
 size_t
-hs_cell_establish_intro_getlen_auth_key(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getlen_auth_key(const trn_cell_establish_intro_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->auth_key);
 }
 
 uint8_t
-hs_cell_establish_intro_get_auth_key(hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_get_auth_key(trn_cell_establish_intro_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->auth_key, idx);
 }
 
 uint8_t
-hs_cell_establish_intro_getconst_auth_key(const hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_getconst_auth_key(const trn_cell_establish_intro_t *inp, size_t idx)
 {
-  return hs_cell_establish_intro_get_auth_key((hs_cell_establish_intro_t*)inp, idx);
+  return trn_cell_establish_intro_get_auth_key((trn_cell_establish_intro_t*)inp, idx);
 }
 int
-hs_cell_establish_intro_set_auth_key(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
+trn_cell_establish_intro_set_auth_key(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->auth_key, idx, elt);
   return 0;
 }
 int
-hs_cell_establish_intro_add_auth_key(hs_cell_establish_intro_t *inp, uint8_t elt)
+trn_cell_establish_intro_add_auth_key(trn_cell_establish_intro_t *inp, uint8_t elt)
 {
 #if SIZE_MAX >= UINT16_MAX
   if (inp->auth_key.n_ == UINT16_MAX)
@@ -138,17 +138,17 @@ hs_cell_establish_intro_add_auth_key(hs_cell_establish_intro_t *inp, uint8_t elt
 }
 
 uint8_t *
-hs_cell_establish_intro_getarray_auth_key(hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getarray_auth_key(trn_cell_establish_intro_t *inp)
 {
   return inp->auth_key.elts_;
 }
 const uint8_t  *
-hs_cell_establish_intro_getconstarray_auth_key(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getconstarray_auth_key(const trn_cell_establish_intro_t *inp)
 {
-  return (const uint8_t  *)hs_cell_establish_intro_getarray_auth_key((hs_cell_establish_intro_t*)inp);
+  return (const uint8_t  *)trn_cell_establish_intro_getarray_auth_key((trn_cell_establish_intro_t*)inp);
 }
 int
-hs_cell_establish_intro_setlen_auth_key(hs_cell_establish_intro_t *inp, size_t newlen)
+trn_cell_establish_intro_setlen_auth_key(trn_cell_establish_intro_t *inp, size_t newlen)
 {
   uint8_t *newptr;
 #if UINT16_MAX < SIZE_MAX
@@ -167,54 +167,54 @@ hs_cell_establish_intro_setlen_auth_key(hs_cell_establish_intro_t *inp, size_t n
   TRUNNEL_SET_ERROR_CODE(inp);
   return -1;
 }
-struct cell_extension_st *
-hs_cell_establish_intro_get_extensions(hs_cell_establish_intro_t *inp)
+struct trn_cell_extension_st *
+trn_cell_establish_intro_get_extensions(trn_cell_establish_intro_t *inp)
 {
   return inp->extensions;
 }
-const struct cell_extension_st *
-hs_cell_establish_intro_getconst_extensions(const hs_cell_establish_intro_t *inp)
+const struct trn_cell_extension_st *
+trn_cell_establish_intro_getconst_extensions(const trn_cell_establish_intro_t *inp)
 {
-  return hs_cell_establish_intro_get_extensions((hs_cell_establish_intro_t*) inp);
+  return trn_cell_establish_intro_get_extensions((trn_cell_establish_intro_t*) inp);
 }
 int
-hs_cell_establish_intro_set_extensions(hs_cell_establish_intro_t *inp, struct cell_extension_st *val)
+trn_cell_establish_intro_set_extensions(trn_cell_establish_intro_t *inp, struct trn_cell_extension_st *val)
 {
   if (inp->extensions && inp->extensions != val)
-    cell_extension_free(inp->extensions);
-  return hs_cell_establish_intro_set0_extensions(inp, val);
+    trn_cell_extension_free(inp->extensions);
+  return trn_cell_establish_intro_set0_extensions(inp, val);
 }
 int
-hs_cell_establish_intro_set0_extensions(hs_cell_establish_intro_t *inp, struct cell_extension_st *val)
+trn_cell_establish_intro_set0_extensions(trn_cell_establish_intro_t *inp, struct trn_cell_extension_st *val)
 {
   inp->extensions = val;
   return 0;
 }
 const uint8_t *
-hs_cell_establish_intro_get_end_mac_fields(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_end_mac_fields(const trn_cell_establish_intro_t *inp)
 {
   return inp->end_mac_fields;
 }
 size_t
-hs_cell_establish_intro_getlen_handshake_mac(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getlen_handshake_mac(const trn_cell_establish_intro_t *inp)
 {
   (void)inp;  return TRUNNEL_SHA3_256_LEN;
 }
 
 uint8_t
-hs_cell_establish_intro_get_handshake_mac(hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_get_handshake_mac(trn_cell_establish_intro_t *inp, size_t idx)
 {
   trunnel_assert(idx < TRUNNEL_SHA3_256_LEN);
   return inp->handshake_mac[idx];
 }
 
 uint8_t
-hs_cell_establish_intro_getconst_handshake_mac(const hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_getconst_handshake_mac(const trn_cell_establish_intro_t *inp, size_t idx)
 {
-  return hs_cell_establish_intro_get_handshake_mac((hs_cell_establish_intro_t*)inp, idx);
+  return trn_cell_establish_intro_get_handshake_mac((trn_cell_establish_intro_t*)inp, idx);
 }
 int
-hs_cell_establish_intro_set_handshake_mac(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
+trn_cell_establish_intro_set_handshake_mac(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
 {
   trunnel_assert(idx < TRUNNEL_SHA3_256_LEN);
   inp->handshake_mac[idx] = elt;
@@ -222,56 +222,56 @@ hs_cell_establish_intro_set_handshake_mac(hs_cell_establish_intro_t *inp, size_t
 }
 
 uint8_t *
-hs_cell_establish_intro_getarray_handshake_mac(hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getarray_handshake_mac(trn_cell_establish_intro_t *inp)
 {
   return inp->handshake_mac;
 }
 const uint8_t  *
-hs_cell_establish_intro_getconstarray_handshake_mac(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getconstarray_handshake_mac(const trn_cell_establish_intro_t *inp)
 {
-  return (const uint8_t  *)hs_cell_establish_intro_getarray_handshake_mac((hs_cell_establish_intro_t*)inp);
+  return (const uint8_t  *)trn_cell_establish_intro_getarray_handshake_mac((trn_cell_establish_intro_t*)inp);
 }
 const uint8_t *
-hs_cell_establish_intro_get_end_sig_fields(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_end_sig_fields(const trn_cell_establish_intro_t *inp)
 {
   return inp->end_sig_fields;
 }
 uint16_t
-hs_cell_establish_intro_get_sig_len(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_get_sig_len(const trn_cell_establish_intro_t *inp)
 {
   return inp->sig_len;
 }
 int
-hs_cell_establish_intro_set_sig_len(hs_cell_establish_intro_t *inp, uint16_t val)
+trn_cell_establish_intro_set_sig_len(trn_cell_establish_intro_t *inp, uint16_t val)
 {
   inp->sig_len = val;
   return 0;
 }
 size_t
-hs_cell_establish_intro_getlen_sig(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getlen_sig(const trn_cell_establish_intro_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->sig);
 }
 
 uint8_t
-hs_cell_establish_intro_get_sig(hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_get_sig(trn_cell_establish_intro_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->sig, idx);
 }
 
 uint8_t
-hs_cell_establish_intro_getconst_sig(const hs_cell_establish_intro_t *inp, size_t idx)
+trn_cell_establish_intro_getconst_sig(const trn_cell_establish_intro_t *inp, size_t idx)
 {
-  return hs_cell_establish_intro_get_sig((hs_cell_establish_intro_t*)inp, idx);
+  return trn_cell_establish_intro_get_sig((trn_cell_establish_intro_t*)inp, idx);
 }
 int
-hs_cell_establish_intro_set_sig(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
+trn_cell_establish_intro_set_sig(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->sig, idx, elt);
   return 0;
 }
 int
-hs_cell_establish_intro_add_sig(hs_cell_establish_intro_t *inp, uint8_t elt)
+trn_cell_establish_intro_add_sig(trn_cell_establish_intro_t *inp, uint8_t elt)
 {
 #if SIZE_MAX >= UINT16_MAX
   if (inp->sig.n_ == UINT16_MAX)
@@ -285,17 +285,17 @@ hs_cell_establish_intro_add_sig(hs_cell_establish_intro_t *inp, uint8_t elt)
 }
 
 uint8_t *
-hs_cell_establish_intro_getarray_sig(hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getarray_sig(trn_cell_establish_intro_t *inp)
 {
   return inp->sig.elts_;
 }
 const uint8_t  *
-hs_cell_establish_intro_getconstarray_sig(const hs_cell_establish_intro_t *inp)
+trn_cell_establish_intro_getconstarray_sig(const trn_cell_establish_intro_t *inp)
 {
-  return (const uint8_t  *)hs_cell_establish_intro_getarray_sig((hs_cell_establish_intro_t*)inp);
+  return (const uint8_t  *)trn_cell_establish_intro_getarray_sig((trn_cell_establish_intro_t*)inp);
 }
 int
-hs_cell_establish_intro_setlen_sig(hs_cell_establish_intro_t *inp, size_t newlen)
+trn_cell_establish_intro_setlen_sig(trn_cell_establish_intro_t *inp, size_t newlen)
 {
   uint8_t *newptr;
 #if UINT16_MAX < SIZE_MAX
@@ -315,7 +315,7 @@ hs_cell_establish_intro_setlen_sig(hs_cell_establish_intro_t *inp, size_t newlen
   return -1;
 }
 const char *
-hs_cell_establish_intro_check(const hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_check(const trn_cell_establish_intro_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -327,7 +327,7 @@ hs_cell_establish_intro_check(const hs_cell_establish_intro_t *obj)
     return "Length mismatch for auth_key";
   {
     const char *msg;
-    if (NULL != (msg = cell_extension_check(obj->extensions)))
+    if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
   if (TRUNNEL_DYNARRAY_LEN(&obj->sig) != obj->sig_len)
@@ -336,11 +336,11 @@ hs_cell_establish_intro_check(const hs_cell_establish_intro_t *obj)
 }
 
 ssize_t
-hs_cell_establish_intro_encoded_len(const hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_encoded_len(const trn_cell_establish_intro_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != hs_cell_establish_intro_check(obj))
+  if (NULL != trn_cell_establish_intro_check(obj))
      return -1;
 
 
@@ -353,8 +353,8 @@ hs_cell_establish_intro_encoded_len(const hs_cell_establish_intro_t *obj)
   /* Length of u8 auth_key[auth_key_len] */
   result += TRUNNEL_DYNARRAY_LEN(&obj->auth_key);
 
-  /* Length of struct cell_extension extensions */
-  result += cell_extension_encoded_len(obj->extensions);
+  /* Length of struct trn_cell_extension extensions */
+  result += trn_cell_extension_encoded_len(obj->extensions);
 
   /* Length of u8 handshake_mac[TRUNNEL_SHA3_256_LEN] */
   result += TRUNNEL_SHA3_256_LEN;
@@ -367,24 +367,24 @@ hs_cell_establish_intro_encoded_len(const hs_cell_establish_intro_t *obj)
   return result;
 }
 int
-hs_cell_establish_intro_clear_errors(hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_clear_errors(trn_cell_establish_intro_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-hs_cell_establish_intro_encode(uint8_t *output, const size_t avail, const hs_cell_establish_intro_t *obj)
+trn_cell_establish_intro_encode(uint8_t *output, const size_t avail, const trn_cell_establish_intro_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = hs_cell_establish_intro_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_establish_intro_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = hs_cell_establish_intro_check(obj)))
+  if (NULL != (msg = trn_cell_establish_intro_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -417,9 +417,9 @@ hs_cell_establish_intro_encode(uint8_t *output, const size_t avail, const hs_cel
     written += elt_len; ptr += elt_len;
   }
 
-  /* Encode struct cell_extension extensions */
+  /* Encode struct trn_cell_extension extensions */
   trunnel_assert(written <= avail);
-  result = cell_extension_encode(ptr, avail - written, obj->extensions);
+  result = trn_cell_extension_encode(ptr, avail - written, obj->extensions);
   if (result < 0)
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
@@ -474,11 +474,11 @@ hs_cell_establish_intro_encode(uint8_t *output, const size_t avail, const hs_cel
   return result;
 }
 
-/** As hs_cell_establish_intro_parse(), but do not allocate the output
- * object.
+/** As trn_cell_establish_intro_parse(), but do not allocate the
+ * output object.
  */
 static ssize_t
-hs_cell_establish_intro_parse_into(hs_cell_establish_intro_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_establish_intro_parse_into(trn_cell_establish_intro_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -506,8 +506,8 @@ hs_cell_establish_intro_parse_into(hs_cell_establish_intro_t *obj, const uint8_t
     memcpy(obj->auth_key.elts_, ptr, obj->auth_key_len);
   ptr += obj->auth_key_len; remaining -= obj->auth_key_len;
 
-  /* Parse struct cell_extension extensions */
-  result = cell_extension_parse(&obj->extensions, ptr, remaining);
+  /* Parse struct trn_cell_extension extensions */
+  result = trn_cell_extension_parse(&obj->extensions, ptr, remaining);
   if (result < 0)
     goto relay_fail;
   trunnel_assert((size_t)result <= remaining);
@@ -548,23 +548,23 @@ hs_cell_establish_intro_parse_into(hs_cell_establish_intro_t *obj, const uint8_t
 }
 
 ssize_t
-hs_cell_establish_intro_parse(hs_cell_establish_intro_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_establish_intro_parse(trn_cell_establish_intro_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = hs_cell_establish_intro_new();
+  *output = trn_cell_establish_intro_new();
   if (NULL == *output)
     return -1;
-  result = hs_cell_establish_intro_parse_into(*output, input, len_in);
+  result = trn_cell_establish_intro_parse_into(*output, input, len_in);
   if (result < 0) {
-    hs_cell_establish_intro_free(*output);
+    trn_cell_establish_intro_free(*output);
     *output = NULL;
   }
   return result;
 }
-hs_cell_intro_established_t *
-hs_cell_intro_established_new(void)
+trn_cell_intro_established_t *
+trn_cell_intro_established_new(void)
 {
-  hs_cell_intro_established_t *val = trunnel_calloc(1, sizeof(hs_cell_intro_established_t));
+  trn_cell_intro_established_t *val = trunnel_calloc(1, sizeof(trn_cell_intro_established_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -573,48 +573,48 @@ hs_cell_intro_established_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-hs_cell_intro_established_clear(hs_cell_intro_established_t *obj)
+trn_cell_intro_established_clear(trn_cell_intro_established_t *obj)
 {
   (void) obj;
-  cell_extension_free(obj->extensions);
+  trn_cell_extension_free(obj->extensions);
   obj->extensions = NULL;
 }
 
 void
-hs_cell_intro_established_free(hs_cell_intro_established_t *obj)
+trn_cell_intro_established_free(trn_cell_intro_established_t *obj)
 {
   if (obj == NULL)
     return;
-  hs_cell_intro_established_clear(obj);
-  trunnel_memwipe(obj, sizeof(hs_cell_intro_established_t));
+  trn_cell_intro_established_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_intro_established_t));
   trunnel_free_(obj);
 }
 
-struct cell_extension_st *
-hs_cell_intro_established_get_extensions(hs_cell_intro_established_t *inp)
+struct trn_cell_extension_st *
+trn_cell_intro_established_get_extensions(trn_cell_intro_established_t *inp)
 {
   return inp->extensions;
 }
-const struct cell_extension_st *
-hs_cell_intro_established_getconst_extensions(const hs_cell_intro_established_t *inp)
+const struct trn_cell_extension_st *
+trn_cell_intro_established_getconst_extensions(const trn_cell_intro_established_t *inp)
 {
-  return hs_cell_intro_established_get_extensions((hs_cell_intro_established_t*) inp);
+  return trn_cell_intro_established_get_extensions((trn_cell_intro_established_t*) inp);
 }
 int
-hs_cell_intro_established_set_extensions(hs_cell_intro_established_t *inp, struct cell_extension_st *val)
+trn_cell_intro_established_set_extensions(trn_cell_intro_established_t *inp, struct trn_cell_extension_st *val)
 {
   if (inp->extensions && inp->extensions != val)
-    cell_extension_free(inp->extensions);
-  return hs_cell_intro_established_set0_extensions(inp, val);
+    trn_cell_extension_free(inp->extensions);
+  return trn_cell_intro_established_set0_extensions(inp, val);
 }
 int
-hs_cell_intro_established_set0_extensions(hs_cell_intro_established_t *inp, struct cell_extension_st *val)
+trn_cell_intro_established_set0_extensions(trn_cell_intro_established_t *inp, struct trn_cell_extension_st *val)
 {
   inp->extensions = val;
   return 0;
 }
 const char *
-hs_cell_intro_established_check(const hs_cell_intro_established_t *obj)
+trn_cell_intro_established_check(const trn_cell_intro_established_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -622,53 +622,53 @@ hs_cell_intro_established_check(const hs_cell_intro_established_t *obj)
     return "A set function failed on this object";
   {
     const char *msg;
-    if (NULL != (msg = cell_extension_check(obj->extensions)))
+    if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
   return NULL;
 }
 
 ssize_t
-hs_cell_intro_established_encoded_len(const hs_cell_intro_established_t *obj)
+trn_cell_intro_established_encoded_len(const trn_cell_intro_established_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != hs_cell_intro_established_check(obj))
+  if (NULL != trn_cell_intro_established_check(obj))
      return -1;
 
 
-  /* Length of struct cell_extension extensions */
-  result += cell_extension_encoded_len(obj->extensions);
+  /* Length of struct trn_cell_extension extensions */
+  result += trn_cell_extension_encoded_len(obj->extensions);
   return result;
 }
 int
-hs_cell_intro_established_clear_errors(hs_cell_intro_established_t *obj)
+trn_cell_intro_established_clear_errors(trn_cell_intro_established_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-hs_cell_intro_established_encode(uint8_t *output, const size_t avail, const hs_cell_intro_established_t *obj)
+trn_cell_intro_established_encode(uint8_t *output, const size_t avail, const trn_cell_intro_established_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = hs_cell_intro_established_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_intro_established_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = hs_cell_intro_established_check(obj)))
+  if (NULL != (msg = trn_cell_intro_established_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
   trunnel_assert(encoded_len >= 0);
 #endif
 
-  /* Encode struct cell_extension extensions */
+  /* Encode struct trn_cell_extension extensions */
   trunnel_assert(written <= avail);
-  result = cell_extension_encode(ptr, avail - written, obj->extensions);
+  result = trn_cell_extension_encode(ptr, avail - written, obj->extensions);
   if (result < 0)
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
@@ -694,19 +694,19 @@ hs_cell_intro_established_encode(uint8_t *output, const size_t avail, const hs_c
   return result;
 }
 
-/** As hs_cell_intro_established_parse(), but do not allocate the
+/** As trn_cell_intro_established_parse(), but do not allocate the
  * output object.
  */
 static ssize_t
-hs_cell_intro_established_parse_into(hs_cell_intro_established_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_intro_established_parse_into(trn_cell_intro_established_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
   ssize_t result = 0;
   (void)result;
 
-  /* Parse struct cell_extension extensions */
-  result = cell_extension_parse(&obj->extensions, ptr, remaining);
+  /* Parse struct trn_cell_extension extensions */
+  result = trn_cell_extension_parse(&obj->extensions, ptr, remaining);
   if (result < 0)
     goto relay_fail;
   trunnel_assert((size_t)result <= remaining);
@@ -720,15 +720,15 @@ hs_cell_intro_established_parse_into(hs_cell_intro_established_t *obj, const uin
 }
 
 ssize_t
-hs_cell_intro_established_parse(hs_cell_intro_established_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_intro_established_parse(trn_cell_intro_established_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = hs_cell_intro_established_new();
+  *output = trn_cell_intro_established_new();
   if (NULL == *output)
     return -1;
-  result = hs_cell_intro_established_parse_into(*output, input, len_in);
+  result = trn_cell_intro_established_parse_into(*output, input, len_in);
   if (result < 0) {
-    hs_cell_intro_established_free(*output);
+    trn_cell_intro_established_free(*output);
     *output = NULL;
   }
   return result;
diff --git a/src/trunnel/hs/cell_establish_intro.h b/src/trunnel/hs/cell_establish_intro.h
index 725d47cd85..2f0d893659 100644
--- a/src/trunnel/hs/cell_establish_intro.h
+++ b/src/trunnel/hs/cell_establish_intro.h
@@ -8,15 +8,15 @@
 #include <stdint.h>
 #include "trunnel.h"
 
-struct cell_extension_st;
+struct trn_cell_extension_st;
 #define TRUNNEL_SHA3_256_LEN 32
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_HS_CELL_ESTABLISH_INTRO)
-struct hs_cell_establish_intro_st {
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_ESTABLISH_INTRO)
+struct trn_cell_establish_intro_st {
   const uint8_t *start_cell;
   uint8_t auth_key_type;
   uint16_t auth_key_len;
   TRUNNEL_DYNARRAY_HEAD(, uint8_t) auth_key;
-  struct cell_extension_st *extensions;
+  struct trn_cell_extension_st *extensions;
   const uint8_t *end_mac_fields;
   uint8_t handshake_mac[TRUNNEL_SHA3_256_LEN];
   const uint8_t *end_sig_fields;
@@ -25,251 +25,252 @@ struct hs_cell_establish_intro_st {
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct hs_cell_establish_intro_st hs_cell_establish_intro_t;
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_HS_CELL_INTRO_ESTABLISHED)
-struct hs_cell_intro_established_st {
-  struct cell_extension_st *extensions;
+typedef struct trn_cell_establish_intro_st trn_cell_establish_intro_t;
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRO_ESTABLISHED)
+struct trn_cell_intro_established_st {
+  struct trn_cell_extension_st *extensions;
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct hs_cell_intro_established_st hs_cell_intro_established_t;
-/** Return a newly allocated hs_cell_establish_intro with all elements
- * set to zero.
+typedef struct trn_cell_intro_established_st trn_cell_intro_established_t;
+/** Return a newly allocated trn_cell_establish_intro with all
+ * elements set to zero.
  */
-hs_cell_establish_intro_t *hs_cell_establish_intro_new(void);
-/** Release all storage held by the hs_cell_establish_intro in
+trn_cell_establish_intro_t *trn_cell_establish_intro_new(void);
+/** Release all storage held by the trn_cell_establish_intro in
  * 'victim'. (Do nothing if 'victim' is NULL.)
  */
-void hs_cell_establish_intro_free(hs_cell_establish_intro_t *victim);
-/** Try to parse a hs_cell_establish_intro from the buffer in 'input',
- * using up to 'len_in' bytes from the input buffer. On success,
- * return the number of bytes consumed and set *output to the newly
- * allocated hs_cell_establish_intro_t. On failure, return -2 if the
- * input appears truncated, and -1 if the input is otherwise invalid.
+void trn_cell_establish_intro_free(trn_cell_establish_intro_t *victim);
+/** Try to parse a trn_cell_establish_intro from the buffer in
+ * 'input', using up to 'len_in' bytes from the input buffer. On
+ * success, return the number of bytes consumed and set *output to the
+ * newly allocated trn_cell_establish_intro_t. On failure, return -2
+ * if the input appears truncated, and -1 if the input is otherwise
+ * invalid.
  */
-ssize_t hs_cell_establish_intro_parse(hs_cell_establish_intro_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_establish_intro_parse(trn_cell_establish_intro_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * hs_cell_establish_intro in 'obj'. On failure, return a negative
+ * trn_cell_establish_intro in 'obj'. On failure, return a negative
  * value. Note that this value may be an overestimate, and can even be
  * an underestimate for certain unencodeable objects.
  */
-ssize_t hs_cell_establish_intro_encoded_len(const hs_cell_establish_intro_t *obj);
-/** Try to encode the hs_cell_establish_intro from 'input' into the
+ssize_t trn_cell_establish_intro_encoded_len(const trn_cell_establish_intro_t *obj);
+/** Try to encode the trn_cell_establish_intro from 'input' into the
  * buffer at 'output', using up to 'avail' bytes of the output buffer.
  * On success, return the number of bytes used. On failure, return -2
  * if the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t hs_cell_establish_intro_encode(uint8_t *output, size_t avail, const hs_cell_establish_intro_t *input);
-/** Check whether the internal state of the hs_cell_establish_intro in
- * 'obj' is consistent. Return NULL if it is, and a short message if
- * it is not.
+ssize_t trn_cell_establish_intro_encode(uint8_t *output, size_t avail, const trn_cell_establish_intro_t *input);
+/** Check whether the internal state of the trn_cell_establish_intro
+ * in 'obj' is consistent. Return NULL if it is, and a short message
+ * if it is not.
  */
-const char *hs_cell_establish_intro_check(const hs_cell_establish_intro_t *obj);
+const char *trn_cell_establish_intro_check(const trn_cell_establish_intro_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int hs_cell_establish_intro_clear_errors(hs_cell_establish_intro_t *obj);
+int trn_cell_establish_intro_clear_errors(trn_cell_establish_intro_t *obj);
 /** Return the position for start_cell when we parsed this object
  */
-const uint8_t * hs_cell_establish_intro_get_start_cell(const hs_cell_establish_intro_t *inp);
+const uint8_t * trn_cell_establish_intro_get_start_cell(const trn_cell_establish_intro_t *inp);
 /** Return the value of the auth_key_type field of the
- * hs_cell_establish_intro_t in 'inp'
+ * trn_cell_establish_intro_t in 'inp'
  */
-uint8_t hs_cell_establish_intro_get_auth_key_type(const hs_cell_establish_intro_t *inp);
+uint8_t trn_cell_establish_intro_get_auth_key_type(const trn_cell_establish_intro_t *inp);
 /** Set the value of the auth_key_type field of the
- * hs_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
+ * trn_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_set_auth_key_type(hs_cell_establish_intro_t *inp, uint8_t val);
+int trn_cell_establish_intro_set_auth_key_type(trn_cell_establish_intro_t *inp, uint8_t val);
 /** Return the value of the auth_key_len field of the
- * hs_cell_establish_intro_t in 'inp'
+ * trn_cell_establish_intro_t in 'inp'
  */
-uint16_t hs_cell_establish_intro_get_auth_key_len(const hs_cell_establish_intro_t *inp);
+uint16_t trn_cell_establish_intro_get_auth_key_len(const trn_cell_establish_intro_t *inp);
 /** Set the value of the auth_key_len field of the
- * hs_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
+ * trn_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_set_auth_key_len(hs_cell_establish_intro_t *inp, uint16_t val);
+int trn_cell_establish_intro_set_auth_key_len(trn_cell_establish_intro_t *inp, uint16_t val);
 /** Return the length of the dynamic array holding the auth_key field
- * of the hs_cell_establish_intro_t in 'inp'.
+ * of the trn_cell_establish_intro_t in 'inp'.
  */
-size_t hs_cell_establish_intro_getlen_auth_key(const hs_cell_establish_intro_t *inp);
+size_t trn_cell_establish_intro_getlen_auth_key(const trn_cell_establish_intro_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * auth_key of the hs_cell_establish_intro_t in 'inp'.
+ * auth_key of the trn_cell_establish_intro_t in 'inp'.
  */
-uint8_t hs_cell_establish_intro_get_auth_key(hs_cell_establish_intro_t *inp, size_t idx);
-/** As hs_cell_establish_intro_get_auth_key, but take and return a
+uint8_t trn_cell_establish_intro_get_auth_key(trn_cell_establish_intro_t *inp, size_t idx);
+/** As trn_cell_establish_intro_get_auth_key, but take and return a
  * const pointer
  */
-uint8_t hs_cell_establish_intro_getconst_auth_key(const hs_cell_establish_intro_t *inp, size_t idx);
+uint8_t trn_cell_establish_intro_getconst_auth_key(const trn_cell_establish_intro_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * auth_key of the hs_cell_establish_intro_t in 'inp', so that it will
- * hold the value 'elt'.
+ * auth_key of the trn_cell_establish_intro_t in 'inp', so that it
+ * will hold the value 'elt'.
  */
-int hs_cell_establish_intro_set_auth_key(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
+int trn_cell_establish_intro_set_auth_key(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field auth_key of
- * the hs_cell_establish_intro_t in 'inp'.
+ * the trn_cell_establish_intro_t in 'inp'.
  */
-int hs_cell_establish_intro_add_auth_key(hs_cell_establish_intro_t *inp, uint8_t elt);
+int trn_cell_establish_intro_add_auth_key(trn_cell_establish_intro_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field auth_key of
  * 'inp'.
  */
-uint8_t * hs_cell_establish_intro_getarray_auth_key(hs_cell_establish_intro_t *inp);
-/** As hs_cell_establish_intro_get_auth_key, but take and return a
+uint8_t * trn_cell_establish_intro_getarray_auth_key(trn_cell_establish_intro_t *inp);
+/** As trn_cell_establish_intro_get_auth_key, but take and return a
  * const pointer
  */
-const uint8_t  * hs_cell_establish_intro_getconstarray_auth_key(const hs_cell_establish_intro_t *inp);
+const uint8_t  * trn_cell_establish_intro_getconstarray_auth_key(const trn_cell_establish_intro_t *inp);
 /** Change the length of the variable-length array field auth_key of
  * 'inp' to 'newlen'.Fill extra elements with 0. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_setlen_auth_key(hs_cell_establish_intro_t *inp, size_t newlen);
+int trn_cell_establish_intro_setlen_auth_key(trn_cell_establish_intro_t *inp, size_t newlen);
 /** Return the value of the extensions field of the
- * hs_cell_establish_intro_t in 'inp'
+ * trn_cell_establish_intro_t in 'inp'
  */
-struct cell_extension_st * hs_cell_establish_intro_get_extensions(hs_cell_establish_intro_t *inp);
-/** As hs_cell_establish_intro_get_extensions, but take and return a
+struct trn_cell_extension_st * trn_cell_establish_intro_get_extensions(trn_cell_establish_intro_t *inp);
+/** As trn_cell_establish_intro_get_extensions, but take and return a
  * const pointer
  */
-const struct cell_extension_st * hs_cell_establish_intro_getconst_extensions(const hs_cell_establish_intro_t *inp);
+const struct trn_cell_extension_st * trn_cell_establish_intro_getconst_extensions(const trn_cell_establish_intro_t *inp);
 /** Set the value of the extensions field of the
- * hs_cell_establish_intro_t in 'inp' to 'val'. Free the old value if
+ * trn_cell_establish_intro_t in 'inp' to 'val'. Free the old value if
  * any. Steals the referenceto 'val'.Return 0 on success; return -1
  * and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_set_extensions(hs_cell_establish_intro_t *inp, struct cell_extension_st *val);
-/** As hs_cell_establish_intro_set_extensions, but does not free the
+int trn_cell_establish_intro_set_extensions(trn_cell_establish_intro_t *inp, struct trn_cell_extension_st *val);
+/** As trn_cell_establish_intro_set_extensions, but does not free the
  * previous value.
  */
-int hs_cell_establish_intro_set0_extensions(hs_cell_establish_intro_t *inp, struct cell_extension_st *val);
+int trn_cell_establish_intro_set0_extensions(trn_cell_establish_intro_t *inp, struct trn_cell_extension_st *val);
 /** Return the position for end_mac_fields when we parsed this object
  */
-const uint8_t * hs_cell_establish_intro_get_end_mac_fields(const hs_cell_establish_intro_t *inp);
+const uint8_t * trn_cell_establish_intro_get_end_mac_fields(const trn_cell_establish_intro_t *inp);
 /** Return the (constant) length of the array holding the
- * handshake_mac field of the hs_cell_establish_intro_t in 'inp'.
+ * handshake_mac field of the trn_cell_establish_intro_t in 'inp'.
  */
-size_t hs_cell_establish_intro_getlen_handshake_mac(const hs_cell_establish_intro_t *inp);
+size_t trn_cell_establish_intro_getlen_handshake_mac(const trn_cell_establish_intro_t *inp);
 /** Return the element at position 'idx' of the fixed array field
- * handshake_mac of the hs_cell_establish_intro_t in 'inp'.
+ * handshake_mac of the trn_cell_establish_intro_t in 'inp'.
  */
-uint8_t hs_cell_establish_intro_get_handshake_mac(hs_cell_establish_intro_t *inp, size_t idx);
-/** As hs_cell_establish_intro_get_handshake_mac, but take and return
+uint8_t trn_cell_establish_intro_get_handshake_mac(trn_cell_establish_intro_t *inp, size_t idx);
+/** As trn_cell_establish_intro_get_handshake_mac, but take and return
  * a const pointer
  */
-uint8_t hs_cell_establish_intro_getconst_handshake_mac(const hs_cell_establish_intro_t *inp, size_t idx);
+uint8_t trn_cell_establish_intro_getconst_handshake_mac(const trn_cell_establish_intro_t *inp, size_t idx);
 /** Change the element at position 'idx' of the fixed array field
- * handshake_mac of the hs_cell_establish_intro_t in 'inp', so that it
- * will hold the value 'elt'.
+ * handshake_mac of the trn_cell_establish_intro_t in 'inp', so that
+ * it will hold the value 'elt'.
  */
-int hs_cell_establish_intro_set_handshake_mac(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
+int trn_cell_establish_intro_set_handshake_mac(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
 /** Return a pointer to the TRUNNEL_SHA3_256_LEN-element array field
  * handshake_mac of 'inp'.
  */
-uint8_t * hs_cell_establish_intro_getarray_handshake_mac(hs_cell_establish_intro_t *inp);
-/** As hs_cell_establish_intro_get_handshake_mac, but take and return
+uint8_t * trn_cell_establish_intro_getarray_handshake_mac(trn_cell_establish_intro_t *inp);
+/** As trn_cell_establish_intro_get_handshake_mac, but take and return
  * a const pointer
  */
-const uint8_t  * hs_cell_establish_intro_getconstarray_handshake_mac(const hs_cell_establish_intro_t *inp);
+const uint8_t  * trn_cell_establish_intro_getconstarray_handshake_mac(const trn_cell_establish_intro_t *inp);
 /** Return the position for end_sig_fields when we parsed this object
  */
-const uint8_t * hs_cell_establish_intro_get_end_sig_fields(const hs_cell_establish_intro_t *inp);
+const uint8_t * trn_cell_establish_intro_get_end_sig_fields(const trn_cell_establish_intro_t *inp);
 /** Return the value of the sig_len field of the
- * hs_cell_establish_intro_t in 'inp'
+ * trn_cell_establish_intro_t in 'inp'
  */
-uint16_t hs_cell_establish_intro_get_sig_len(const hs_cell_establish_intro_t *inp);
+uint16_t trn_cell_establish_intro_get_sig_len(const trn_cell_establish_intro_t *inp);
 /** Set the value of the sig_len field of the
- * hs_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
+ * trn_cell_establish_intro_t in 'inp' to 'val'. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_set_sig_len(hs_cell_establish_intro_t *inp, uint16_t val);
+int trn_cell_establish_intro_set_sig_len(trn_cell_establish_intro_t *inp, uint16_t val);
 /** Return the length of the dynamic array holding the sig field of
- * the hs_cell_establish_intro_t in 'inp'.
+ * the trn_cell_establish_intro_t in 'inp'.
  */
-size_t hs_cell_establish_intro_getlen_sig(const hs_cell_establish_intro_t *inp);
+size_t trn_cell_establish_intro_getlen_sig(const trn_cell_establish_intro_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * sig of the hs_cell_establish_intro_t in 'inp'.
+ * sig of the trn_cell_establish_intro_t in 'inp'.
  */
-uint8_t hs_cell_establish_intro_get_sig(hs_cell_establish_intro_t *inp, size_t idx);
-/** As hs_cell_establish_intro_get_sig, but take and return a const
+uint8_t trn_cell_establish_intro_get_sig(trn_cell_establish_intro_t *inp, size_t idx);
+/** As trn_cell_establish_intro_get_sig, but take and return a const
  * pointer
  */
-uint8_t hs_cell_establish_intro_getconst_sig(const hs_cell_establish_intro_t *inp, size_t idx);
+uint8_t trn_cell_establish_intro_getconst_sig(const trn_cell_establish_intro_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * sig of the hs_cell_establish_intro_t in 'inp', so that it will hold
- * the value 'elt'.
+ * sig of the trn_cell_establish_intro_t in 'inp', so that it will
+ * hold the value 'elt'.
  */
-int hs_cell_establish_intro_set_sig(hs_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
+int trn_cell_establish_intro_set_sig(trn_cell_establish_intro_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field sig of the
- * hs_cell_establish_intro_t in 'inp'.
+ * trn_cell_establish_intro_t in 'inp'.
  */
-int hs_cell_establish_intro_add_sig(hs_cell_establish_intro_t *inp, uint8_t elt);
+int trn_cell_establish_intro_add_sig(trn_cell_establish_intro_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field sig of 'inp'.
  */
-uint8_t * hs_cell_establish_intro_getarray_sig(hs_cell_establish_intro_t *inp);
-/** As hs_cell_establish_intro_get_sig, but take and return a const
+uint8_t * trn_cell_establish_intro_getarray_sig(trn_cell_establish_intro_t *inp);
+/** As trn_cell_establish_intro_get_sig, but take and return a const
  * pointer
  */
-const uint8_t  * hs_cell_establish_intro_getconstarray_sig(const hs_cell_establish_intro_t *inp);
+const uint8_t  * trn_cell_establish_intro_getconstarray_sig(const trn_cell_establish_intro_t *inp);
 /** Change the length of the variable-length array field sig of 'inp'
  * to 'newlen'.Fill extra elements with 0. Return 0 on success; return
  * -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_establish_intro_setlen_sig(hs_cell_establish_intro_t *inp, size_t newlen);
-/** Return a newly allocated hs_cell_intro_established with all
+int trn_cell_establish_intro_setlen_sig(trn_cell_establish_intro_t *inp, size_t newlen);
+/** Return a newly allocated trn_cell_intro_established with all
  * elements set to zero.
  */
-hs_cell_intro_established_t *hs_cell_intro_established_new(void);
-/** Release all storage held by the hs_cell_intro_established in
+trn_cell_intro_established_t *trn_cell_intro_established_new(void);
+/** Release all storage held by the trn_cell_intro_established in
  * 'victim'. (Do nothing if 'victim' is NULL.)
  */
-void hs_cell_intro_established_free(hs_cell_intro_established_t *victim);
-/** Try to parse a hs_cell_intro_established from the buffer in
+void trn_cell_intro_established_free(trn_cell_intro_established_t *victim);
+/** Try to parse a trn_cell_intro_established from the buffer in
  * 'input', using up to 'len_in' bytes from the input buffer. On
  * success, return the number of bytes consumed and set *output to the
- * newly allocated hs_cell_intro_established_t. On failure, return -2
+ * newly allocated trn_cell_intro_established_t. On failure, return -2
  * if the input appears truncated, and -1 if the input is otherwise
  * invalid.
  */
-ssize_t hs_cell_intro_established_parse(hs_cell_intro_established_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_intro_established_parse(trn_cell_intro_established_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * hs_cell_intro_established in 'obj'. On failure, return a negative
+ * trn_cell_intro_established in 'obj'. On failure, return a negative
  * value. Note that this value may be an overestimate, and can even be
  * an underestimate for certain unencodeable objects.
  */
-ssize_t hs_cell_intro_established_encoded_len(const hs_cell_intro_established_t *obj);
-/** Try to encode the hs_cell_intro_established from 'input' into the
+ssize_t trn_cell_intro_established_encoded_len(const trn_cell_intro_established_t *obj);
+/** Try to encode the trn_cell_intro_established from 'input' into the
  * buffer at 'output', using up to 'avail' bytes of the output buffer.
  * On success, return the number of bytes used. On failure, return -2
  * if the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t hs_cell_intro_established_encode(uint8_t *output, size_t avail, const hs_cell_intro_established_t *input);
-/** Check whether the internal state of the hs_cell_intro_established
+ssize_t trn_cell_intro_established_encode(uint8_t *output, size_t avail, const trn_cell_intro_established_t *input);
+/** Check whether the internal state of the trn_cell_intro_established
  * in 'obj' is consistent. Return NULL if it is, and a short message
  * if it is not.
  */
-const char *hs_cell_intro_established_check(const hs_cell_intro_established_t *obj);
+const char *trn_cell_intro_established_check(const trn_cell_intro_established_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int hs_cell_intro_established_clear_errors(hs_cell_intro_established_t *obj);
+int trn_cell_intro_established_clear_errors(trn_cell_intro_established_t *obj);
 /** Return the value of the extensions field of the
- * hs_cell_intro_established_t in 'inp'
+ * trn_cell_intro_established_t in 'inp'
  */
-struct cell_extension_st * hs_cell_intro_established_get_extensions(hs_cell_intro_established_t *inp);
-/** As hs_cell_intro_established_get_extensions, but take and return a
- * const pointer
+struct trn_cell_extension_st * trn_cell_intro_established_get_extensions(trn_cell_intro_established_t *inp);
+/** As trn_cell_intro_established_get_extensions, but take and return
+ * a const pointer
  */
-const struct cell_extension_st * hs_cell_intro_established_getconst_extensions(const hs_cell_intro_established_t *inp);
+const struct trn_cell_extension_st * trn_cell_intro_established_getconst_extensions(const trn_cell_intro_established_t *inp);
 /** Set the value of the extensions field of the
- * hs_cell_intro_established_t in 'inp' to 'val'. Free the old value
+ * trn_cell_intro_established_t in 'inp' to 'val'. Free the old value
  * if any. Steals the referenceto 'val'.Return 0 on success; return -1
  * and set the error code on 'inp' on failure.
  */
-int hs_cell_intro_established_set_extensions(hs_cell_intro_established_t *inp, struct cell_extension_st *val);
-/** As hs_cell_intro_established_set_extensions, but does not free the
- * previous value.
+int trn_cell_intro_established_set_extensions(trn_cell_intro_established_t *inp, struct trn_cell_extension_st *val);
+/** As trn_cell_intro_established_set_extensions, but does not free
+ * the previous value.
  */
-int hs_cell_intro_established_set0_extensions(hs_cell_intro_established_t *inp, struct cell_extension_st *val);
+int trn_cell_intro_established_set0_extensions(trn_cell_intro_established_t *inp, struct trn_cell_extension_st *val);
 
 
 #endif
diff --git a/src/trunnel/hs/cell_establish_intro.trunnel b/src/trunnel/hs/cell_establish_intro.trunnel
index 33a133bf67..011ee62a15 100644
--- a/src/trunnel/hs/cell_establish_intro.trunnel
+++ b/src/trunnel/hs/cell_establish_intro.trunnel
@@ -4,12 +4,12 @@
  * specified in proposal 224 section 3.1.
  */
 
-extern struct cell_extension;
+extern struct trn_cell_extension;
 
 const TRUNNEL_SHA3_256_LEN = 32;
 
 /* ESTABLISH_INTRO payload. See details in section 3.1.1 */
-struct hs_cell_establish_intro {
+struct trn_cell_establish_intro {
   /* Indicate the start of the handshake authentication data. */
   @ptr start_cell;
 
@@ -19,7 +19,7 @@ struct hs_cell_establish_intro {
   u8 auth_key[auth_key_len];
 
   /* Extension(s). Reserved fields. */
-  struct cell_extension extensions;
+  struct trn_cell_extension extensions;
   @ptr end_mac_fields;
 
   /* Handshake MAC. */
@@ -35,7 +35,7 @@ struct hs_cell_establish_intro {
 /* INTRO_ESTABLISHED payload which is an acknowledge of the ESTABLISH_INTRO
  * cell. For legacy node, this payload is empty so the following only applies
  * to version >= 3. */
-struct hs_cell_intro_established {
+struct trn_cell_intro_established {
   /* Extension(s). Reserved fields. */
-  struct cell_extension extensions;
+  struct trn_cell_extension extensions;
 };
diff --git a/src/trunnel/hs/cell_introduce1.c b/src/trunnel/hs/cell_introduce1.c
index 5922a086dc..7501f6f196 100644
--- a/src/trunnel/hs/cell_introduce1.c
+++ b/src/trunnel/hs/cell_introduce1.c
@@ -28,14 +28,14 @@ int cellintroduce_deadcode_dummy__ = 0;
     }                                                            \
   } while (0)
 
-typedef struct cell_extension_st cell_extension_t;
-cell_extension_t *cell_extension_new(void);
-void cell_extension_free(cell_extension_t *victim);
-ssize_t cell_extension_parse(cell_extension_t **output, const uint8_t *input, const size_t len_in);
-ssize_t cell_extension_encoded_len(const cell_extension_t *obj);
-ssize_t cell_extension_encode(uint8_t *output, size_t avail, const cell_extension_t *input);
-const char *cell_extension_check(const cell_extension_t *obj);
-int cell_extension_clear_errors(cell_extension_t *obj);
+typedef struct trn_cell_extension_st trn_cell_extension_t;
+trn_cell_extension_t *trn_cell_extension_new(void);
+void trn_cell_extension_free(trn_cell_extension_t *victim);
+ssize_t trn_cell_extension_parse(trn_cell_extension_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_extension_encoded_len(const trn_cell_extension_t *obj);
+ssize_t trn_cell_extension_encode(uint8_t *output, size_t avail, const trn_cell_extension_t *input);
+const char *trn_cell_extension_check(const trn_cell_extension_t *obj);
+int trn_cell_extension_clear_errors(trn_cell_extension_t *obj);
 typedef struct link_specifier_st link_specifier_t;
 link_specifier_t *link_specifier_new(void);
 void link_specifier_free(link_specifier_t *victim);
@@ -44,10 +44,10 @@ ssize_t link_specifier_encoded_len(const link_specifier_t *obj);
 ssize_t link_specifier_encode(uint8_t *output, size_t avail, const link_specifier_t *input);
 const char *link_specifier_check(const link_specifier_t *obj);
 int link_specifier_clear_errors(link_specifier_t *obj);
-hs_cell_introduce1_t *
-hs_cell_introduce1_new(void)
+trn_cell_introduce1_t *
+trn_cell_introduce1_new(void)
 {
-  hs_cell_introduce1_t *val = trunnel_calloc(1, sizeof(hs_cell_introduce1_t));
+  trn_cell_introduce1_t *val = trunnel_calloc(1, sizeof(trn_cell_introduce1_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -56,47 +56,47 @@ hs_cell_introduce1_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-hs_cell_introduce1_clear(hs_cell_introduce1_t *obj)
+trn_cell_introduce1_clear(trn_cell_introduce1_t *obj)
 {
   (void) obj;
   TRUNNEL_DYNARRAY_WIPE(&obj->auth_key);
   TRUNNEL_DYNARRAY_CLEAR(&obj->auth_key);
-  cell_extension_free(obj->extensions);
+  trn_cell_extension_free(obj->extensions);
   obj->extensions = NULL;
   TRUNNEL_DYNARRAY_WIPE(&obj->encrypted);
   TRUNNEL_DYNARRAY_CLEAR(&obj->encrypted);
 }
 
 void
-hs_cell_introduce1_free(hs_cell_introduce1_t *obj)
+trn_cell_introduce1_free(trn_cell_introduce1_t *obj)
 {
   if (obj == NULL)
     return;
-  hs_cell_introduce1_clear(obj);
-  trunnel_memwipe(obj, sizeof(hs_cell_introduce1_t));
+  trn_cell_introduce1_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_introduce1_t));
   trunnel_free_(obj);
 }
 
 size_t
-hs_cell_introduce1_getlen_legacy_key_id(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getlen_legacy_key_id(const trn_cell_introduce1_t *inp)
 {
   (void)inp;  return TRUNNEL_SHA1_LEN;
 }
 
 uint8_t
-hs_cell_introduce1_get_legacy_key_id(hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_get_legacy_key_id(trn_cell_introduce1_t *inp, size_t idx)
 {
   trunnel_assert(idx < TRUNNEL_SHA1_LEN);
   return inp->legacy_key_id[idx];
 }
 
 uint8_t
-hs_cell_introduce1_getconst_legacy_key_id(const hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_getconst_legacy_key_id(const trn_cell_introduce1_t *inp, size_t idx)
 {
-  return hs_cell_introduce1_get_legacy_key_id((hs_cell_introduce1_t*)inp, idx);
+  return trn_cell_introduce1_get_legacy_key_id((trn_cell_introduce1_t*)inp, idx);
 }
 int
-hs_cell_introduce1_set_legacy_key_id(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce1_set_legacy_key_id(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt)
 {
   trunnel_assert(idx < TRUNNEL_SHA1_LEN);
   inp->legacy_key_id[idx] = elt;
@@ -104,22 +104,22 @@ hs_cell_introduce1_set_legacy_key_id(hs_cell_introduce1_t *inp, size_t idx, uint
 }
 
 uint8_t *
-hs_cell_introduce1_getarray_legacy_key_id(hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getarray_legacy_key_id(trn_cell_introduce1_t *inp)
 {
   return inp->legacy_key_id;
 }
 const uint8_t  *
-hs_cell_introduce1_getconstarray_legacy_key_id(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getconstarray_legacy_key_id(const trn_cell_introduce1_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce1_getarray_legacy_key_id((hs_cell_introduce1_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce1_getarray_legacy_key_id((trn_cell_introduce1_t*)inp);
 }
 uint8_t
-hs_cell_introduce1_get_auth_key_type(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_get_auth_key_type(const trn_cell_introduce1_t *inp)
 {
   return inp->auth_key_type;
 }
 int
-hs_cell_introduce1_set_auth_key_type(hs_cell_introduce1_t *inp, uint8_t val)
+trn_cell_introduce1_set_auth_key_type(trn_cell_introduce1_t *inp, uint8_t val)
 {
   if (! ((val == 0 || val == 1 || val == 2))) {
      TRUNNEL_SET_ERROR_CODE(inp);
@@ -129,41 +129,41 @@ hs_cell_introduce1_set_auth_key_type(hs_cell_introduce1_t *inp, uint8_t val)
   return 0;
 }
 uint16_t
-hs_cell_introduce1_get_auth_key_len(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_get_auth_key_len(const trn_cell_introduce1_t *inp)
 {
   return inp->auth_key_len;
 }
 int
-hs_cell_introduce1_set_auth_key_len(hs_cell_introduce1_t *inp, uint16_t val)
+trn_cell_introduce1_set_auth_key_len(trn_cell_introduce1_t *inp, uint16_t val)
 {
   inp->auth_key_len = val;
   return 0;
 }
 size_t
-hs_cell_introduce1_getlen_auth_key(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getlen_auth_key(const trn_cell_introduce1_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->auth_key);
 }
 
 uint8_t
-hs_cell_introduce1_get_auth_key(hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_get_auth_key(trn_cell_introduce1_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->auth_key, idx);
 }
 
 uint8_t
-hs_cell_introduce1_getconst_auth_key(const hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_getconst_auth_key(const trn_cell_introduce1_t *inp, size_t idx)
 {
-  return hs_cell_introduce1_get_auth_key((hs_cell_introduce1_t*)inp, idx);
+  return trn_cell_introduce1_get_auth_key((trn_cell_introduce1_t*)inp, idx);
 }
 int
-hs_cell_introduce1_set_auth_key(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce1_set_auth_key(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->auth_key, idx, elt);
   return 0;
 }
 int
-hs_cell_introduce1_add_auth_key(hs_cell_introduce1_t *inp, uint8_t elt)
+trn_cell_introduce1_add_auth_key(trn_cell_introduce1_t *inp, uint8_t elt)
 {
 #if SIZE_MAX >= UINT16_MAX
   if (inp->auth_key.n_ == UINT16_MAX)
@@ -177,17 +177,17 @@ hs_cell_introduce1_add_auth_key(hs_cell_introduce1_t *inp, uint8_t elt)
 }
 
 uint8_t *
-hs_cell_introduce1_getarray_auth_key(hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getarray_auth_key(trn_cell_introduce1_t *inp)
 {
   return inp->auth_key.elts_;
 }
 const uint8_t  *
-hs_cell_introduce1_getconstarray_auth_key(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getconstarray_auth_key(const trn_cell_introduce1_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce1_getarray_auth_key((hs_cell_introduce1_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce1_getarray_auth_key((trn_cell_introduce1_t*)inp);
 }
 int
-hs_cell_introduce1_setlen_auth_key(hs_cell_introduce1_t *inp, size_t newlen)
+trn_cell_introduce1_setlen_auth_key(trn_cell_introduce1_t *inp, size_t newlen)
 {
   uint8_t *newptr;
 #if UINT16_MAX < SIZE_MAX
@@ -206,54 +206,54 @@ hs_cell_introduce1_setlen_auth_key(hs_cell_introduce1_t *inp, size_t newlen)
   TRUNNEL_SET_ERROR_CODE(inp);
   return -1;
 }
-struct cell_extension_st *
-hs_cell_introduce1_get_extensions(hs_cell_introduce1_t *inp)
+struct trn_cell_extension_st *
+trn_cell_introduce1_get_extensions(trn_cell_introduce1_t *inp)
 {
   return inp->extensions;
 }
-const struct cell_extension_st *
-hs_cell_introduce1_getconst_extensions(const hs_cell_introduce1_t *inp)
+const struct trn_cell_extension_st *
+trn_cell_introduce1_getconst_extensions(const trn_cell_introduce1_t *inp)
 {
-  return hs_cell_introduce1_get_extensions((hs_cell_introduce1_t*) inp);
+  return trn_cell_introduce1_get_extensions((trn_cell_introduce1_t*) inp);
 }
 int
-hs_cell_introduce1_set_extensions(hs_cell_introduce1_t *inp, struct cell_extension_st *val)
+trn_cell_introduce1_set_extensions(trn_cell_introduce1_t *inp, struct trn_cell_extension_st *val)
 {
   if (inp->extensions && inp->extensions != val)
-    cell_extension_free(inp->extensions);
-  return hs_cell_introduce1_set0_extensions(inp, val);
+    trn_cell_extension_free(inp->extensions);
+  return trn_cell_introduce1_set0_extensions(inp, val);
 }
 int
-hs_cell_introduce1_set0_extensions(hs_cell_introduce1_t *inp, struct cell_extension_st *val)
+trn_cell_introduce1_set0_extensions(trn_cell_introduce1_t *inp, struct trn_cell_extension_st *val)
 {
   inp->extensions = val;
   return 0;
 }
 size_t
-hs_cell_introduce1_getlen_encrypted(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getlen_encrypted(const trn_cell_introduce1_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->encrypted);
 }
 
 uint8_t
-hs_cell_introduce1_get_encrypted(hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_get_encrypted(trn_cell_introduce1_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->encrypted, idx);
 }
 
 uint8_t
-hs_cell_introduce1_getconst_encrypted(const hs_cell_introduce1_t *inp, size_t idx)
+trn_cell_introduce1_getconst_encrypted(const trn_cell_introduce1_t *inp, size_t idx)
 {
-  return hs_cell_introduce1_get_encrypted((hs_cell_introduce1_t*)inp, idx);
+  return trn_cell_introduce1_get_encrypted((trn_cell_introduce1_t*)inp, idx);
 }
 int
-hs_cell_introduce1_set_encrypted(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce1_set_encrypted(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->encrypted, idx, elt);
   return 0;
 }
 int
-hs_cell_introduce1_add_encrypted(hs_cell_introduce1_t *inp, uint8_t elt)
+trn_cell_introduce1_add_encrypted(trn_cell_introduce1_t *inp, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->encrypted, elt, {});
   return 0;
@@ -263,17 +263,17 @@ hs_cell_introduce1_add_encrypted(hs_cell_introduce1_t *inp, uint8_t elt)
 }
 
 uint8_t *
-hs_cell_introduce1_getarray_encrypted(hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getarray_encrypted(trn_cell_introduce1_t *inp)
 {
   return inp->encrypted.elts_;
 }
 const uint8_t  *
-hs_cell_introduce1_getconstarray_encrypted(const hs_cell_introduce1_t *inp)
+trn_cell_introduce1_getconstarray_encrypted(const trn_cell_introduce1_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce1_getarray_encrypted((hs_cell_introduce1_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce1_getarray_encrypted((trn_cell_introduce1_t*)inp);
 }
 int
-hs_cell_introduce1_setlen_encrypted(hs_cell_introduce1_t *inp, size_t newlen)
+trn_cell_introduce1_setlen_encrypted(trn_cell_introduce1_t *inp, size_t newlen)
 {
   uint8_t *newptr;
   newptr = trunnel_dynarray_setlen(&inp->encrypted.allocated_,
@@ -289,7 +289,7 @@ hs_cell_introduce1_setlen_encrypted(hs_cell_introduce1_t *inp, size_t newlen)
   return -1;
 }
 const char *
-hs_cell_introduce1_check(const hs_cell_introduce1_t *obj)
+trn_cell_introduce1_check(const trn_cell_introduce1_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -301,18 +301,18 @@ hs_cell_introduce1_check(const hs_cell_introduce1_t *obj)
     return "Length mismatch for auth_key";
   {
     const char *msg;
-    if (NULL != (msg = cell_extension_check(obj->extensions)))
+    if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
   return NULL;
 }
 
 ssize_t
-hs_cell_introduce1_encoded_len(const hs_cell_introduce1_t *obj)
+trn_cell_introduce1_encoded_len(const trn_cell_introduce1_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != hs_cell_introduce1_check(obj))
+  if (NULL != trn_cell_introduce1_check(obj))
      return -1;
 
 
@@ -328,32 +328,32 @@ hs_cell_introduce1_encoded_len(const hs_cell_introduce1_t *obj)
   /* Length of u8 auth_key[auth_key_len] */
   result += TRUNNEL_DYNARRAY_LEN(&obj->auth_key);
 
-  /* Length of struct cell_extension extensions */
-  result += cell_extension_encoded_len(obj->extensions);
+  /* Length of struct trn_cell_extension extensions */
+  result += trn_cell_extension_encoded_len(obj->extensions);
 
   /* Length of u8 encrypted[] */
   result += TRUNNEL_DYNARRAY_LEN(&obj->encrypted);
   return result;
 }
 int
-hs_cell_introduce1_clear_errors(hs_cell_introduce1_t *obj)
+trn_cell_introduce1_clear_errors(trn_cell_introduce1_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-hs_cell_introduce1_encode(uint8_t *output, const size_t avail, const hs_cell_introduce1_t *obj)
+trn_cell_introduce1_encode(uint8_t *output, const size_t avail, const trn_cell_introduce1_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = hs_cell_introduce1_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_introduce1_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = hs_cell_introduce1_check(obj)))
+  if (NULL != (msg = trn_cell_introduce1_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -393,9 +393,9 @@ hs_cell_introduce1_encode(uint8_t *output, const size_t avail, const hs_cell_int
     written += elt_len; ptr += elt_len;
   }
 
-  /* Encode struct cell_extension extensions */
+  /* Encode struct trn_cell_extension extensions */
   trunnel_assert(written <= avail);
-  result = cell_extension_encode(ptr, avail - written, obj->extensions);
+  result = trn_cell_extension_encode(ptr, avail - written, obj->extensions);
   if (result < 0)
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
@@ -435,11 +435,11 @@ hs_cell_introduce1_encode(uint8_t *output, const size_t avail, const hs_cell_int
   return result;
 }
 
-/** As hs_cell_introduce1_parse(), but do not allocate the output
+/** As trn_cell_introduce1_parse(), but do not allocate the output
  * object.
  */
 static ssize_t
-hs_cell_introduce1_parse_into(hs_cell_introduce1_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_introduce1_parse_into(trn_cell_introduce1_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -471,8 +471,8 @@ hs_cell_introduce1_parse_into(hs_cell_introduce1_t *obj, const uint8_t *input, c
     memcpy(obj->auth_key.elts_, ptr, obj->auth_key_len);
   ptr += obj->auth_key_len; remaining -= obj->auth_key_len;
 
-  /* Parse struct cell_extension extensions */
-  result = cell_extension_parse(&obj->extensions, ptr, remaining);
+  /* Parse struct trn_cell_extension extensions */
+  result = trn_cell_extension_parse(&obj->extensions, ptr, remaining);
   if (result < 0)
     goto relay_fail;
   trunnel_assert((size_t)result <= remaining);
@@ -500,23 +500,23 @@ hs_cell_introduce1_parse_into(hs_cell_introduce1_t *obj, const uint8_t *input, c
 }
 
 ssize_t
-hs_cell_introduce1_parse(hs_cell_introduce1_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_introduce1_parse(trn_cell_introduce1_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = hs_cell_introduce1_new();
+  *output = trn_cell_introduce1_new();
   if (NULL == *output)
     return -1;
-  result = hs_cell_introduce1_parse_into(*output, input, len_in);
+  result = trn_cell_introduce1_parse_into(*output, input, len_in);
   if (result < 0) {
-    hs_cell_introduce1_free(*output);
+    trn_cell_introduce1_free(*output);
     *output = NULL;
   }
   return result;
 }
-hs_cell_introduce_ack_t *
-hs_cell_introduce_ack_new(void)
+trn_cell_introduce_ack_t *
+trn_cell_introduce_ack_new(void)
 {
-  hs_cell_introduce_ack_t *val = trunnel_calloc(1, sizeof(hs_cell_introduce_ack_t));
+  trn_cell_introduce_ack_t *val = trunnel_calloc(1, sizeof(trn_cell_introduce_ack_t));
   if (NULL == val)
     return NULL;
   return val;
@@ -525,30 +525,30 @@ hs_cell_introduce_ack_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-hs_cell_introduce_ack_clear(hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_clear(trn_cell_introduce_ack_t *obj)
 {
   (void) obj;
-  cell_extension_free(obj->extensions);
+  trn_cell_extension_free(obj->extensions);
   obj->extensions = NULL;
 }
 
 void
-hs_cell_introduce_ack_free(hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_free(trn_cell_introduce_ack_t *obj)
 {
   if (obj == NULL)
     return;
-  hs_cell_introduce_ack_clear(obj);
-  trunnel_memwipe(obj, sizeof(hs_cell_introduce_ack_t));
+  trn_cell_introduce_ack_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_introduce_ack_t));
   trunnel_free_(obj);
 }
 
 uint16_t
-hs_cell_introduce_ack_get_status(const hs_cell_introduce_ack_t *inp)
+trn_cell_introduce_ack_get_status(const trn_cell_introduce_ack_t *inp)
 {
   return inp->status;
 }
 int
-hs_cell_introduce_ack_set_status(hs_cell_introduce_ack_t *inp, uint16_t val)
+trn_cell_introduce_ack_set_status(trn_cell_introduce_ack_t *inp, uint16_t val)
 {
   if (! ((val == 0 || val == 1 || val == 2))) {
      TRUNNEL_SET_ERROR_CODE(inp);
@@ -557,31 +557,31 @@ hs_cell_introduce_ack_set_status(hs_cell_introduce_ack_t *inp, uint16_t val)
   inp->status = val;
   return 0;
 }
-struct cell_extension_st *
-hs_cell_introduce_ack_get_extensions(hs_cell_introduce_ack_t *inp)
+struct trn_cell_extension_st *
+trn_cell_introduce_ack_get_extensions(trn_cell_introduce_ack_t *inp)
 {
   return inp->extensions;
 }
-const struct cell_extension_st *
-hs_cell_introduce_ack_getconst_extensions(const hs_cell_introduce_ack_t *inp)
+const struct trn_cell_extension_st *
+trn_cell_introduce_ack_getconst_extensions(const trn_cell_introduce_ack_t *inp)
 {
-  return hs_cell_introduce_ack_get_extensions((hs_cell_introduce_ack_t*) inp);
+  return trn_cell_introduce_ack_get_extensions((trn_cell_introduce_ack_t*) inp);
 }
 int
-hs_cell_introduce_ack_set_extensions(hs_cell_introduce_ack_t *inp, struct cell_extension_st *val)
+trn_cell_introduce_ack_set_extensions(trn_cell_introduce_ack_t *inp, struct trn_cell_extension_st *val)
 {
   if (inp->extensions && inp->extensions != val)
-    cell_extension_free(inp->extensions);
-  return hs_cell_introduce_ack_set0_extensions(inp, val);
+    trn_cell_extension_free(inp->extensions);
+  return trn_cell_introduce_ack_set0_extensions(inp, val);
 }
 int
-hs_cell_introduce_ack_set0_extensions(hs_cell_introduce_ack_t *inp, struct cell_extension_st *val)
+trn_cell_introduce_ack_set0_extensions(trn_cell_introduce_ack_t *inp, struct trn_cell_extension_st *val)
 {
   inp->extensions = val;
   return 0;
 }
 const char *
-hs_cell_introduce_ack_check(const hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_check(const trn_cell_introduce_ack_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -591,47 +591,47 @@ hs_cell_introduce_ack_check(const hs_cell_introduce_ack_t *obj)
     return "Integer out of bounds";
   {
     const char *msg;
-    if (NULL != (msg = cell_extension_check(obj->extensions)))
+    if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
   return NULL;
 }
 
 ssize_t
-hs_cell_introduce_ack_encoded_len(const hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_encoded_len(const trn_cell_introduce_ack_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != hs_cell_introduce_ack_check(obj))
+  if (NULL != trn_cell_introduce_ack_check(obj))
      return -1;
 
 
   /* Length of u16 status IN [0, 1, 2] */
   result += 2;
 
-  /* Length of struct cell_extension extensions */
-  result += cell_extension_encoded_len(obj->extensions);
+  /* Length of struct trn_cell_extension extensions */
+  result += trn_cell_extension_encoded_len(obj->extensions);
   return result;
 }
 int
-hs_cell_introduce_ack_clear_errors(hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_clear_errors(trn_cell_introduce_ack_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-hs_cell_introduce_ack_encode(uint8_t *output, const size_t avail, const hs_cell_introduce_ack_t *obj)
+trn_cell_introduce_ack_encode(uint8_t *output, const size_t avail, const trn_cell_introduce_ack_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = hs_cell_introduce_ack_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_introduce_ack_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = hs_cell_introduce_ack_check(obj)))
+  if (NULL != (msg = trn_cell_introduce_ack_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -645,9 +645,9 @@ hs_cell_introduce_ack_encode(uint8_t *output, const size_t avail, const hs_cell_
   trunnel_set_uint16(ptr, trunnel_htons(obj->status));
   written += 2; ptr += 2;
 
-  /* Encode struct cell_extension extensions */
+  /* Encode struct trn_cell_extension extensions */
   trunnel_assert(written <= avail);
-  result = cell_extension_encode(ptr, avail - written, obj->extensions);
+  result = trn_cell_extension_encode(ptr, avail - written, obj->extensions);
   if (result < 0)
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
@@ -676,11 +676,11 @@ hs_cell_introduce_ack_encode(uint8_t *output, const size_t avail, const hs_cell_
   return result;
 }
 
-/** As hs_cell_introduce_ack_parse(), but do not allocate the output
+/** As trn_cell_introduce_ack_parse(), but do not allocate the output
  * object.
  */
 static ssize_t
-hs_cell_introduce_ack_parse_into(hs_cell_introduce_ack_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_introduce_ack_parse_into(trn_cell_introduce_ack_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -694,8 +694,8 @@ hs_cell_introduce_ack_parse_into(hs_cell_introduce_ack_t *obj, const uint8_t *in
   if (! (obj->status == 0 || obj->status == 1 || obj->status == 2))
     goto fail;
 
-  /* Parse struct cell_extension extensions */
-  result = cell_extension_parse(&obj->extensions, ptr, remaining);
+  /* Parse struct trn_cell_extension extensions */
+  result = trn_cell_extension_parse(&obj->extensions, ptr, remaining);
   if (result < 0)
     goto relay_fail;
   trunnel_assert((size_t)result <= remaining);
@@ -714,23 +714,23 @@ hs_cell_introduce_ack_parse_into(hs_cell_introduce_ack_t *obj, const uint8_t *in
 }
 
 ssize_t
-hs_cell_introduce_ack_parse(hs_cell_introduce_ack_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_introduce_ack_parse(trn_cell_introduce_ack_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = hs_cell_introduce_ack_new();
+  *output = trn_cell_introduce_ack_new();
   if (NULL == *output)
     return -1;
-  result = hs_cell_introduce_ack_parse_into(*output, input, len_in);
+  result = trn_cell_introduce_ack_parse_into(*output, input, len_in);
   if (result < 0) {
-    hs_cell_introduce_ack_free(*output);
+    trn_cell_introduce_ack_free(*output);
     *output = NULL;
   }
   return result;
 }
-hs_cell_introduce_encrypted_t *
-hs_cell_introduce_encrypted_new(void)
+trn_cell_introduce_encrypted_t *
+trn_cell_introduce_encrypted_new(void)
 {
-  hs_cell_introduce_encrypted_t *val = trunnel_calloc(1, sizeof(hs_cell_introduce_encrypted_t));
+  trn_cell_introduce_encrypted_t *val = trunnel_calloc(1, sizeof(trn_cell_introduce_encrypted_t));
   if (NULL == val)
     return NULL;
   val->onion_key_type = 1;
@@ -740,10 +740,10 @@ hs_cell_introduce_encrypted_new(void)
 /** Release all storage held inside 'obj', but do not free 'obj'.
  */
 static void
-hs_cell_introduce_encrypted_clear(hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_clear(trn_cell_introduce_encrypted_t *obj)
 {
   (void) obj;
-  cell_extension_free(obj->extensions);
+  trn_cell_extension_free(obj->extensions);
   obj->extensions = NULL;
   TRUNNEL_DYNARRAY_WIPE(&obj->onion_key);
   TRUNNEL_DYNARRAY_CLEAR(&obj->onion_key);
@@ -761,35 +761,35 @@ hs_cell_introduce_encrypted_clear(hs_cell_introduce_encrypted_t *obj)
 }
 
 void
-hs_cell_introduce_encrypted_free(hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_free(trn_cell_introduce_encrypted_t *obj)
 {
   if (obj == NULL)
     return;
-  hs_cell_introduce_encrypted_clear(obj);
-  trunnel_memwipe(obj, sizeof(hs_cell_introduce_encrypted_t));
+  trn_cell_introduce_encrypted_clear(obj);
+  trunnel_memwipe(obj, sizeof(trn_cell_introduce_encrypted_t));
   trunnel_free_(obj);
 }
 
 size_t
-hs_cell_introduce_encrypted_getlen_rend_cookie(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getlen_rend_cookie(const trn_cell_introduce_encrypted_t *inp)
 {
   (void)inp;  return TRUNNEL_REND_COOKIE_LEN;
 }
 
 uint8_t
-hs_cell_introduce_encrypted_get_rend_cookie(hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_get_rend_cookie(trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
   trunnel_assert(idx < TRUNNEL_REND_COOKIE_LEN);
   return inp->rend_cookie[idx];
 }
 
 uint8_t
-hs_cell_introduce_encrypted_getconst_rend_cookie(const hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_getconst_rend_cookie(const trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
-  return hs_cell_introduce_encrypted_get_rend_cookie((hs_cell_introduce_encrypted_t*)inp, idx);
+  return trn_cell_introduce_encrypted_get_rend_cookie((trn_cell_introduce_encrypted_t*)inp, idx);
 }
 int
-hs_cell_introduce_encrypted_set_rend_cookie(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce_encrypted_set_rend_cookie(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
 {
   trunnel_assert(idx < TRUNNEL_REND_COOKIE_LEN);
   inp->rend_cookie[idx] = elt;
@@ -797,45 +797,45 @@ hs_cell_introduce_encrypted_set_rend_cookie(hs_cell_introduce_encrypted_t *inp,
 }
 
 uint8_t *
-hs_cell_introduce_encrypted_getarray_rend_cookie(hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getarray_rend_cookie(trn_cell_introduce_encrypted_t *inp)
 {
   return inp->rend_cookie;
 }
 const uint8_t  *
-hs_cell_introduce_encrypted_getconstarray_rend_cookie(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getconstarray_rend_cookie(const trn_cell_introduce_encrypted_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce_encrypted_getarray_rend_cookie((hs_cell_introduce_encrypted_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce_encrypted_getarray_rend_cookie((trn_cell_introduce_encrypted_t*)inp);
 }
-struct cell_extension_st *
-hs_cell_introduce_encrypted_get_extensions(hs_cell_introduce_encrypted_t *inp)
+struct trn_cell_extension_st *
+trn_cell_introduce_encrypted_get_extensions(trn_cell_introduce_encrypted_t *inp)
 {
   return inp->extensions;
 }
-const struct cell_extension_st *
-hs_cell_introduce_encrypted_getconst_extensions(const hs_cell_introduce_encrypted_t *inp)
+const struct trn_cell_extension_st *
+trn_cell_introduce_encrypted_getconst_extensions(const trn_cell_introduce_encrypted_t *inp)
 {
-  return hs_cell_introduce_encrypted_get_extensions((hs_cell_introduce_encrypted_t*) inp);
+  return trn_cell_introduce_encrypted_get_extensions((trn_cell_introduce_encrypted_t*) inp);
 }
 int
-hs_cell_introduce_encrypted_set_extensions(hs_cell_introduce_encrypted_t *inp, struct cell_extension_st *val)
+trn_cell_introduce_encrypted_set_extensions(trn_cell_introduce_encrypted_t *inp, struct trn_cell_extension_st *val)
 {
   if (inp->extensions && inp->extensions != val)
-    cell_extension_free(inp->extensions);
-  return hs_cell_introduce_encrypted_set0_extensions(inp, val);
+    trn_cell_extension_free(inp->extensions);
+  return trn_cell_introduce_encrypted_set0_extensions(inp, val);
 }
 int
-hs_cell_introduce_encrypted_set0_extensions(hs_cell_introduce_encrypted_t *inp, struct cell_extension_st *val)
+trn_cell_introduce_encrypted_set0_extensions(trn_cell_introduce_encrypted_t *inp, struct trn_cell_extension_st *val)
 {
   inp->extensions = val;
   return 0;
 }
 uint8_t
-hs_cell_introduce_encrypted_get_onion_key_type(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_get_onion_key_type(const trn_cell_introduce_encrypted_t *inp)
 {
   return inp->onion_key_type;
 }
 int
-hs_cell_introduce_encrypted_set_onion_key_type(hs_cell_introduce_encrypted_t *inp, uint8_t val)
+trn_cell_introduce_encrypted_set_onion_key_type(trn_cell_introduce_encrypted_t *inp, uint8_t val)
 {
   if (! ((val == 1))) {
      TRUNNEL_SET_ERROR_CODE(inp);
@@ -845,41 +845,41 @@ hs_cell_introduce_encrypted_set_onion_key_type(hs_cell_introduce_encrypted_t *in
   return 0;
 }
 uint16_t
-hs_cell_introduce_encrypted_get_onion_key_len(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_get_onion_key_len(const trn_cell_introduce_encrypted_t *inp)
 {
   return inp->onion_key_len;
 }
 int
-hs_cell_introduce_encrypted_set_onion_key_len(hs_cell_introduce_encrypted_t *inp, uint16_t val)
+trn_cell_introduce_encrypted_set_onion_key_len(trn_cell_introduce_encrypted_t *inp, uint16_t val)
 {
   inp->onion_key_len = val;
   return 0;
 }
 size_t
-hs_cell_introduce_encrypted_getlen_onion_key(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getlen_onion_key(const trn_cell_introduce_encrypted_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->onion_key);
 }
 
 uint8_t
-hs_cell_introduce_encrypted_get_onion_key(hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_get_onion_key(trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->onion_key, idx);
 }
 
 uint8_t
-hs_cell_introduce_encrypted_getconst_onion_key(const hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_getconst_onion_key(const trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
-  return hs_cell_introduce_encrypted_get_onion_key((hs_cell_introduce_encrypted_t*)inp, idx);
+  return trn_cell_introduce_encrypted_get_onion_key((trn_cell_introduce_encrypted_t*)inp, idx);
 }
 int
-hs_cell_introduce_encrypted_set_onion_key(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce_encrypted_set_onion_key(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->onion_key, idx, elt);
   return 0;
 }
 int
-hs_cell_introduce_encrypted_add_onion_key(hs_cell_introduce_encrypted_t *inp, uint8_t elt)
+trn_cell_introduce_encrypted_add_onion_key(trn_cell_introduce_encrypted_t *inp, uint8_t elt)
 {
 #if SIZE_MAX >= UINT16_MAX
   if (inp->onion_key.n_ == UINT16_MAX)
@@ -893,17 +893,17 @@ hs_cell_introduce_encrypted_add_onion_key(hs_cell_introduce_encrypted_t *inp, ui
 }
 
 uint8_t *
-hs_cell_introduce_encrypted_getarray_onion_key(hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getarray_onion_key(trn_cell_introduce_encrypted_t *inp)
 {
   return inp->onion_key.elts_;
 }
 const uint8_t  *
-hs_cell_introduce_encrypted_getconstarray_onion_key(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getconstarray_onion_key(const trn_cell_introduce_encrypted_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce_encrypted_getarray_onion_key((hs_cell_introduce_encrypted_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce_encrypted_getarray_onion_key((trn_cell_introduce_encrypted_t*)inp);
 }
 int
-hs_cell_introduce_encrypted_setlen_onion_key(hs_cell_introduce_encrypted_t *inp, size_t newlen)
+trn_cell_introduce_encrypted_setlen_onion_key(trn_cell_introduce_encrypted_t *inp, size_t newlen)
 {
   uint8_t *newptr;
 #if UINT16_MAX < SIZE_MAX
@@ -923,49 +923,49 @@ hs_cell_introduce_encrypted_setlen_onion_key(hs_cell_introduce_encrypted_t *inp,
   return -1;
 }
 uint8_t
-hs_cell_introduce_encrypted_get_nspec(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_get_nspec(const trn_cell_introduce_encrypted_t *inp)
 {
   return inp->nspec;
 }
 int
-hs_cell_introduce_encrypted_set_nspec(hs_cell_introduce_encrypted_t *inp, uint8_t val)
+trn_cell_introduce_encrypted_set_nspec(trn_cell_introduce_encrypted_t *inp, uint8_t val)
 {
   inp->nspec = val;
   return 0;
 }
 size_t
-hs_cell_introduce_encrypted_getlen_nspecs(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getlen_nspecs(const trn_cell_introduce_encrypted_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->nspecs);
 }
 
 struct link_specifier_st *
-hs_cell_introduce_encrypted_get_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_get_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->nspecs, idx);
 }
 
  const struct link_specifier_st *
-hs_cell_introduce_encrypted_getconst_nspecs(const hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_getconst_nspecs(const trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
-  return hs_cell_introduce_encrypted_get_nspecs((hs_cell_introduce_encrypted_t*)inp, idx);
+  return trn_cell_introduce_encrypted_get_nspecs((trn_cell_introduce_encrypted_t*)inp, idx);
 }
 int
-hs_cell_introduce_encrypted_set_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt)
+trn_cell_introduce_encrypted_set_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt)
 {
   link_specifier_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->nspecs, idx);
   if (oldval && oldval != elt)
     link_specifier_free(oldval);
-  return hs_cell_introduce_encrypted_set0_nspecs(inp, idx, elt);
+  return trn_cell_introduce_encrypted_set0_nspecs(inp, idx, elt);
 }
 int
-hs_cell_introduce_encrypted_set0_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt)
+trn_cell_introduce_encrypted_set0_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->nspecs, idx, elt);
   return 0;
 }
 int
-hs_cell_introduce_encrypted_add_nspecs(hs_cell_introduce_encrypted_t *inp, struct link_specifier_st * elt)
+trn_cell_introduce_encrypted_add_nspecs(trn_cell_introduce_encrypted_t *inp, struct link_specifier_st * elt)
 {
 #if SIZE_MAX >= UINT8_MAX
   if (inp->nspecs.n_ == UINT8_MAX)
@@ -979,17 +979,17 @@ hs_cell_introduce_encrypted_add_nspecs(hs_cell_introduce_encrypted_t *inp, struc
 }
 
 struct link_specifier_st * *
-hs_cell_introduce_encrypted_getarray_nspecs(hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getarray_nspecs(trn_cell_introduce_encrypted_t *inp)
 {
   return inp->nspecs.elts_;
 }
 const struct link_specifier_st *  const  *
-hs_cell_introduce_encrypted_getconstarray_nspecs(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getconstarray_nspecs(const trn_cell_introduce_encrypted_t *inp)
 {
-  return (const struct link_specifier_st *  const  *)hs_cell_introduce_encrypted_getarray_nspecs((hs_cell_introduce_encrypted_t*)inp);
+  return (const struct link_specifier_st *  const  *)trn_cell_introduce_encrypted_getarray_nspecs((trn_cell_introduce_encrypted_t*)inp);
 }
 int
-hs_cell_introduce_encrypted_setlen_nspecs(hs_cell_introduce_encrypted_t *inp, size_t newlen)
+trn_cell_introduce_encrypted_setlen_nspecs(trn_cell_introduce_encrypted_t *inp, size_t newlen)
 {
   struct link_specifier_st * *newptr;
 #if UINT8_MAX < SIZE_MAX
@@ -1009,30 +1009,30 @@ hs_cell_introduce_encrypted_setlen_nspecs(hs_cell_introduce_encrypted_t *inp, si
   return -1;
 }
 size_t
-hs_cell_introduce_encrypted_getlen_pad(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getlen_pad(const trn_cell_introduce_encrypted_t *inp)
 {
   return TRUNNEL_DYNARRAY_LEN(&inp->pad);
 }
 
 uint8_t
-hs_cell_introduce_encrypted_get_pad(hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_get_pad(trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
   return TRUNNEL_DYNARRAY_GET(&inp->pad, idx);
 }
 
 uint8_t
-hs_cell_introduce_encrypted_getconst_pad(const hs_cell_introduce_encrypted_t *inp, size_t idx)
+trn_cell_introduce_encrypted_getconst_pad(const trn_cell_introduce_encrypted_t *inp, size_t idx)
 {
-  return hs_cell_introduce_encrypted_get_pad((hs_cell_introduce_encrypted_t*)inp, idx);
+  return trn_cell_introduce_encrypted_get_pad((trn_cell_introduce_encrypted_t*)inp, idx);
 }
 int
-hs_cell_introduce_encrypted_set_pad(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
+trn_cell_introduce_encrypted_set_pad(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_SET(&inp->pad, idx, elt);
   return 0;
 }
 int
-hs_cell_introduce_encrypted_add_pad(hs_cell_introduce_encrypted_t *inp, uint8_t elt)
+trn_cell_introduce_encrypted_add_pad(trn_cell_introduce_encrypted_t *inp, uint8_t elt)
 {
   TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->pad, elt, {});
   return 0;
@@ -1042,17 +1042,17 @@ hs_cell_introduce_encrypted_add_pad(hs_cell_introduce_encrypted_t *inp, uint8_t
 }
 
 uint8_t *
-hs_cell_introduce_encrypted_getarray_pad(hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getarray_pad(trn_cell_introduce_encrypted_t *inp)
 {
   return inp->pad.elts_;
 }
 const uint8_t  *
-hs_cell_introduce_encrypted_getconstarray_pad(const hs_cell_introduce_encrypted_t *inp)
+trn_cell_introduce_encrypted_getconstarray_pad(const trn_cell_introduce_encrypted_t *inp)
 {
-  return (const uint8_t  *)hs_cell_introduce_encrypted_getarray_pad((hs_cell_introduce_encrypted_t*)inp);
+  return (const uint8_t  *)trn_cell_introduce_encrypted_getarray_pad((trn_cell_introduce_encrypted_t*)inp);
 }
 int
-hs_cell_introduce_encrypted_setlen_pad(hs_cell_introduce_encrypted_t *inp, size_t newlen)
+trn_cell_introduce_encrypted_setlen_pad(trn_cell_introduce_encrypted_t *inp, size_t newlen)
 {
   uint8_t *newptr;
   newptr = trunnel_dynarray_setlen(&inp->pad.allocated_,
@@ -1068,7 +1068,7 @@ hs_cell_introduce_encrypted_setlen_pad(hs_cell_introduce_encrypted_t *inp, size_
   return -1;
 }
 const char *
-hs_cell_introduce_encrypted_check(const hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_check(const trn_cell_introduce_encrypted_t *obj)
 {
   if (obj == NULL)
     return "Object was NULL";
@@ -1076,7 +1076,7 @@ hs_cell_introduce_encrypted_check(const hs_cell_introduce_encrypted_t *obj)
     return "A set function failed on this object";
   {
     const char *msg;
-    if (NULL != (msg = cell_extension_check(obj->extensions)))
+    if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
   if (! (obj->onion_key_type == 1))
@@ -1098,19 +1098,19 @@ hs_cell_introduce_encrypted_check(const hs_cell_introduce_encrypted_t *obj)
 }
 
 ssize_t
-hs_cell_introduce_encrypted_encoded_len(const hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_encoded_len(const trn_cell_introduce_encrypted_t *obj)
 {
   ssize_t result = 0;
 
-  if (NULL != hs_cell_introduce_encrypted_check(obj))
+  if (NULL != trn_cell_introduce_encrypted_check(obj))
      return -1;
 
 
   /* Length of u8 rend_cookie[TRUNNEL_REND_COOKIE_LEN] */
   result += TRUNNEL_REND_COOKIE_LEN;
 
-  /* Length of struct cell_extension extensions */
-  result += cell_extension_encoded_len(obj->extensions);
+  /* Length of struct trn_cell_extension extensions */
+  result += trn_cell_extension_encoded_len(obj->extensions);
 
   /* Length of u8 onion_key_type IN [1] */
   result += 1;
@@ -1138,24 +1138,24 @@ hs_cell_introduce_encrypted_encoded_len(const hs_cell_introduce_encrypted_t *obj
   return result;
 }
 int
-hs_cell_introduce_encrypted_clear_errors(hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_clear_errors(trn_cell_introduce_encrypted_t *obj)
 {
   int r = obj->trunnel_error_code_;
   obj->trunnel_error_code_ = 0;
   return r;
 }
 ssize_t
-hs_cell_introduce_encrypted_encode(uint8_t *output, const size_t avail, const hs_cell_introduce_encrypted_t *obj)
+trn_cell_introduce_encrypted_encode(uint8_t *output, const size_t avail, const trn_cell_introduce_encrypted_t *obj)
 {
   ssize_t result = 0;
   size_t written = 0;
   uint8_t *ptr = output;
   const char *msg;
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
-  const ssize_t encoded_len = hs_cell_introduce_encrypted_encoded_len(obj);
+  const ssize_t encoded_len = trn_cell_introduce_encrypted_encoded_len(obj);
 #endif
 
-  if (NULL != (msg = hs_cell_introduce_encrypted_check(obj)))
+  if (NULL != (msg = trn_cell_introduce_encrypted_check(obj)))
     goto check_failed;
 
 #ifdef TRUNNEL_CHECK_ENCODED_LEN
@@ -1169,9 +1169,9 @@ hs_cell_introduce_encrypted_encode(uint8_t *output, const size_t avail, const hs
   memcpy(ptr, obj->rend_cookie, TRUNNEL_REND_COOKIE_LEN);
   written += TRUNNEL_REND_COOKIE_LEN; ptr += TRUNNEL_REND_COOKIE_LEN;
 
-  /* Encode struct cell_extension extensions */
+  /* Encode struct trn_cell_extension extensions */
   trunnel_assert(written <= avail);
-  result = cell_extension_encode(ptr, avail - written, obj->extensions);
+  result = trn_cell_extension_encode(ptr, avail - written, obj->extensions);
   if (result < 0)
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
@@ -1257,11 +1257,11 @@ hs_cell_introduce_encrypted_encode(uint8_t *output, const size_t avail, const hs
   return result;
 }
 
-/** As hs_cell_introduce_encrypted_parse(), but do not allocate the
+/** As trn_cell_introduce_encrypted_parse(), but do not allocate the
  * output object.
  */
 static ssize_t
-hs_cell_introduce_encrypted_parse_into(hs_cell_introduce_encrypted_t *obj, const uint8_t *input, const size_t len_in)
+trn_cell_introduce_encrypted_parse_into(trn_cell_introduce_encrypted_t *obj, const uint8_t *input, const size_t len_in)
 {
   const uint8_t *ptr = input;
   size_t remaining = len_in;
@@ -1273,8 +1273,8 @@ hs_cell_introduce_encrypted_parse_into(hs_cell_introduce_encrypted_t *obj, const
   memcpy(obj->rend_cookie, ptr, TRUNNEL_REND_COOKIE_LEN);
   remaining -= TRUNNEL_REND_COOKIE_LEN; ptr += TRUNNEL_REND_COOKIE_LEN;
 
-  /* Parse struct cell_extension extensions */
-  result = cell_extension_parse(&obj->extensions, ptr, remaining);
+  /* Parse struct trn_cell_extension extensions */
+  result = trn_cell_extension_parse(&obj->extensions, ptr, remaining);
   if (result < 0)
     goto relay_fail;
   trunnel_assert((size_t)result <= remaining);
@@ -1342,15 +1342,15 @@ hs_cell_introduce_encrypted_parse_into(hs_cell_introduce_encrypted_t *obj, const
 }
 
 ssize_t
-hs_cell_introduce_encrypted_parse(hs_cell_introduce_encrypted_t **output, const uint8_t *input, const size_t len_in)
+trn_cell_introduce_encrypted_parse(trn_cell_introduce_encrypted_t **output, const uint8_t *input, const size_t len_in)
 {
   ssize_t result;
-  *output = hs_cell_introduce_encrypted_new();
+  *output = trn_cell_introduce_encrypted_new();
   if (NULL == *output)
     return -1;
-  result = hs_cell_introduce_encrypted_parse_into(*output, input, len_in);
+  result = trn_cell_introduce_encrypted_parse_into(*output, input, len_in);
   if (result < 0) {
-    hs_cell_introduce_encrypted_free(*output);
+    trn_cell_introduce_encrypted_free(*output);
     *output = NULL;
   }
   return result;
diff --git a/src/trunnel/hs/cell_introduce1.h b/src/trunnel/hs/cell_introduce1.h
index ccd2cda904..cca825a431 100644
--- a/src/trunnel/hs/cell_introduce1.h
+++ b/src/trunnel/hs/cell_introduce1.h
@@ -8,34 +8,34 @@
 #include <stdint.h>
 #include "trunnel.h"
 
-struct cell_extension_st;
+struct trn_cell_extension_st;
 struct link_specifier_st;
 #define TRUNNEL_SHA1_LEN 20
 #define TRUNNEL_REND_COOKIE_LEN 20
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_HS_CELL_INTRODUCE1)
-struct hs_cell_introduce1_st {
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRODUCE1)
+struct trn_cell_introduce1_st {
   uint8_t legacy_key_id[TRUNNEL_SHA1_LEN];
   uint8_t auth_key_type;
   uint16_t auth_key_len;
   TRUNNEL_DYNARRAY_HEAD(, uint8_t) auth_key;
-  struct cell_extension_st *extensions;
+  struct trn_cell_extension_st *extensions;
   TRUNNEL_DYNARRAY_HEAD(, uint8_t) encrypted;
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct hs_cell_introduce1_st hs_cell_introduce1_t;
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_HS_CELL_INTRODUCE_ACK)
-struct hs_cell_introduce_ack_st {
+typedef struct trn_cell_introduce1_st trn_cell_introduce1_t;
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRODUCE_ACK)
+struct trn_cell_introduce_ack_st {
   uint16_t status;
-  struct cell_extension_st *extensions;
+  struct trn_cell_extension_st *extensions;
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct hs_cell_introduce_ack_st hs_cell_introduce_ack_t;
-#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_HS_CELL_INTRODUCE_ENCRYPTED)
-struct hs_cell_introduce_encrypted_st {
+typedef struct trn_cell_introduce_ack_st trn_cell_introduce_ack_t;
+#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRODUCE_ENCRYPTED)
+struct trn_cell_introduce_encrypted_st {
   uint8_t rend_cookie[TRUNNEL_REND_COOKIE_LEN];
-  struct cell_extension_st *extensions;
+  struct trn_cell_extension_st *extensions;
   uint8_t onion_key_type;
   uint16_t onion_key_len;
   TRUNNEL_DYNARRAY_HEAD(, uint8_t) onion_key;
@@ -45,449 +45,449 @@ struct hs_cell_introduce_encrypted_st {
   uint8_t trunnel_error_code_;
 };
 #endif
-typedef struct hs_cell_introduce_encrypted_st hs_cell_introduce_encrypted_t;
-/** Return a newly allocated hs_cell_introduce1 with all elements set
+typedef struct trn_cell_introduce_encrypted_st trn_cell_introduce_encrypted_t;
+/** Return a newly allocated trn_cell_introduce1 with all elements set
  * to zero.
  */
-hs_cell_introduce1_t *hs_cell_introduce1_new(void);
-/** Release all storage held by the hs_cell_introduce1 in 'victim'.
+trn_cell_introduce1_t *trn_cell_introduce1_new(void);
+/** Release all storage held by the trn_cell_introduce1 in 'victim'.
  * (Do nothing if 'victim' is NULL.)
  */
-void hs_cell_introduce1_free(hs_cell_introduce1_t *victim);
-/** Try to parse a hs_cell_introduce1 from the buffer in 'input',
+void trn_cell_introduce1_free(trn_cell_introduce1_t *victim);
+/** Try to parse a trn_cell_introduce1 from the buffer in 'input',
  * using up to 'len_in' bytes from the input buffer. On success,
  * return the number of bytes consumed and set *output to the newly
- * allocated hs_cell_introduce1_t. On failure, return -2 if the input
+ * allocated trn_cell_introduce1_t. On failure, return -2 if the input
  * appears truncated, and -1 if the input is otherwise invalid.
  */
-ssize_t hs_cell_introduce1_parse(hs_cell_introduce1_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_introduce1_parse(trn_cell_introduce1_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * hs_cell_introduce1 in 'obj'. On failure, return a negative value.
+ * trn_cell_introduce1 in 'obj'. On failure, return a negative value.
  * Note that this value may be an overestimate, and can even be an
  * underestimate for certain unencodeable objects.
  */
-ssize_t hs_cell_introduce1_encoded_len(const hs_cell_introduce1_t *obj);
-/** Try to encode the hs_cell_introduce1 from 'input' into the buffer
+ssize_t trn_cell_introduce1_encoded_len(const trn_cell_introduce1_t *obj);
+/** Try to encode the trn_cell_introduce1 from 'input' into the buffer
  * at 'output', using up to 'avail' bytes of the output buffer. On
  * success, return the number of bytes used. On failure, return -2 if
  * the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t hs_cell_introduce1_encode(uint8_t *output, size_t avail, const hs_cell_introduce1_t *input);
-/** Check whether the internal state of the hs_cell_introduce1 in
+ssize_t trn_cell_introduce1_encode(uint8_t *output, size_t avail, const trn_cell_introduce1_t *input);
+/** Check whether the internal state of the trn_cell_introduce1 in
  * 'obj' is consistent. Return NULL if it is, and a short message if
  * it is not.
  */
-const char *hs_cell_introduce1_check(const hs_cell_introduce1_t *obj);
+const char *trn_cell_introduce1_check(const trn_cell_introduce1_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int hs_cell_introduce1_clear_errors(hs_cell_introduce1_t *obj);
+int trn_cell_introduce1_clear_errors(trn_cell_introduce1_t *obj);
 /** Return the (constant) length of the array holding the
- * legacy_key_id field of the hs_cell_introduce1_t in 'inp'.
+ * legacy_key_id field of the trn_cell_introduce1_t in 'inp'.
  */
-size_t hs_cell_introduce1_getlen_legacy_key_id(const hs_cell_introduce1_t *inp);
+size_t trn_cell_introduce1_getlen_legacy_key_id(const trn_cell_introduce1_t *inp);
 /** Return the element at position 'idx' of the fixed array field
- * legacy_key_id of the hs_cell_introduce1_t in 'inp'.
+ * legacy_key_id of the trn_cell_introduce1_t in 'inp'.
  */
-uint8_t hs_cell_introduce1_get_legacy_key_id(hs_cell_introduce1_t *inp, size_t idx);
-/** As hs_cell_introduce1_get_legacy_key_id, but take and return a
+uint8_t trn_cell_introduce1_get_legacy_key_id(trn_cell_introduce1_t *inp, size_t idx);
+/** As trn_cell_introduce1_get_legacy_key_id, but take and return a
  * const pointer
  */
-uint8_t hs_cell_introduce1_getconst_legacy_key_id(const hs_cell_introduce1_t *inp, size_t idx);
+uint8_t trn_cell_introduce1_getconst_legacy_key_id(const trn_cell_introduce1_t *inp, size_t idx);
 /** Change the element at position 'idx' of the fixed array field
- * legacy_key_id of the hs_cell_introduce1_t in 'inp', so that it will
- * hold the value 'elt'.
+ * legacy_key_id of the trn_cell_introduce1_t in 'inp', so that it
+ * will hold the value 'elt'.
  */
-int hs_cell_introduce1_set_legacy_key_id(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce1_set_legacy_key_id(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt);
 /** Return a pointer to the TRUNNEL_SHA1_LEN-element array field
  * legacy_key_id of 'inp'.
  */
-uint8_t * hs_cell_introduce1_getarray_legacy_key_id(hs_cell_introduce1_t *inp);
-/** As hs_cell_introduce1_get_legacy_key_id, but take and return a
+uint8_t * trn_cell_introduce1_getarray_legacy_key_id(trn_cell_introduce1_t *inp);
+/** As trn_cell_introduce1_get_legacy_key_id, but take and return a
  * const pointer
  */
-const uint8_t  * hs_cell_introduce1_getconstarray_legacy_key_id(const hs_cell_introduce1_t *inp);
+const uint8_t  * trn_cell_introduce1_getconstarray_legacy_key_id(const trn_cell_introduce1_t *inp);
 /** Return the value of the auth_key_type field of the
- * hs_cell_introduce1_t in 'inp'
+ * trn_cell_introduce1_t in 'inp'
  */
-uint8_t hs_cell_introduce1_get_auth_key_type(const hs_cell_introduce1_t *inp);
+uint8_t trn_cell_introduce1_get_auth_key_type(const trn_cell_introduce1_t *inp);
 /** Set the value of the auth_key_type field of the
- * hs_cell_introduce1_t in 'inp' to 'val'. Return 0 on success; return
- * -1 and set the error code on 'inp' on failure.
+ * trn_cell_introduce1_t in 'inp' to 'val'. Return 0 on success;
+ * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce1_set_auth_key_type(hs_cell_introduce1_t *inp, uint8_t val);
+int trn_cell_introduce1_set_auth_key_type(trn_cell_introduce1_t *inp, uint8_t val);
 /** Return the value of the auth_key_len field of the
- * hs_cell_introduce1_t in 'inp'
+ * trn_cell_introduce1_t in 'inp'
  */
-uint16_t hs_cell_introduce1_get_auth_key_len(const hs_cell_introduce1_t *inp);
+uint16_t trn_cell_introduce1_get_auth_key_len(const trn_cell_introduce1_t *inp);
 /** Set the value of the auth_key_len field of the
- * hs_cell_introduce1_t in 'inp' to 'val'. Return 0 on success; return
- * -1 and set the error code on 'inp' on failure.
+ * trn_cell_introduce1_t in 'inp' to 'val'. Return 0 on success;
+ * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce1_set_auth_key_len(hs_cell_introduce1_t *inp, uint16_t val);
+int trn_cell_introduce1_set_auth_key_len(trn_cell_introduce1_t *inp, uint16_t val);
 /** Return the length of the dynamic array holding the auth_key field
- * of the hs_cell_introduce1_t in 'inp'.
+ * of the trn_cell_introduce1_t in 'inp'.
  */
-size_t hs_cell_introduce1_getlen_auth_key(const hs_cell_introduce1_t *inp);
+size_t trn_cell_introduce1_getlen_auth_key(const trn_cell_introduce1_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * auth_key of the hs_cell_introduce1_t in 'inp'.
+ * auth_key of the trn_cell_introduce1_t in 'inp'.
  */
-uint8_t hs_cell_introduce1_get_auth_key(hs_cell_introduce1_t *inp, size_t idx);
-/** As hs_cell_introduce1_get_auth_key, but take and return a const
+uint8_t trn_cell_introduce1_get_auth_key(trn_cell_introduce1_t *inp, size_t idx);
+/** As trn_cell_introduce1_get_auth_key, but take and return a const
  * pointer
  */
-uint8_t hs_cell_introduce1_getconst_auth_key(const hs_cell_introduce1_t *inp, size_t idx);
+uint8_t trn_cell_introduce1_getconst_auth_key(const trn_cell_introduce1_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * auth_key of the hs_cell_introduce1_t in 'inp', so that it will hold
- * the value 'elt'.
+ * auth_key of the trn_cell_introduce1_t in 'inp', so that it will
+ * hold the value 'elt'.
  */
-int hs_cell_introduce1_set_auth_key(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce1_set_auth_key(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field auth_key of
- * the hs_cell_introduce1_t in 'inp'.
+ * the trn_cell_introduce1_t in 'inp'.
  */
-int hs_cell_introduce1_add_auth_key(hs_cell_introduce1_t *inp, uint8_t elt);
+int trn_cell_introduce1_add_auth_key(trn_cell_introduce1_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field auth_key of
  * 'inp'.
  */
-uint8_t * hs_cell_introduce1_getarray_auth_key(hs_cell_introduce1_t *inp);
-/** As hs_cell_introduce1_get_auth_key, but take and return a const
+uint8_t * trn_cell_introduce1_getarray_auth_key(trn_cell_introduce1_t *inp);
+/** As trn_cell_introduce1_get_auth_key, but take and return a const
  * pointer
  */
-const uint8_t  * hs_cell_introduce1_getconstarray_auth_key(const hs_cell_introduce1_t *inp);
+const uint8_t  * trn_cell_introduce1_getconstarray_auth_key(const trn_cell_introduce1_t *inp);
 /** Change the length of the variable-length array field auth_key of
  * 'inp' to 'newlen'.Fill extra elements with 0. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce1_setlen_auth_key(hs_cell_introduce1_t *inp, size_t newlen);
+int trn_cell_introduce1_setlen_auth_key(trn_cell_introduce1_t *inp, size_t newlen);
 /** Return the value of the extensions field of the
- * hs_cell_introduce1_t in 'inp'
+ * trn_cell_introduce1_t in 'inp'
  */
-struct cell_extension_st * hs_cell_introduce1_get_extensions(hs_cell_introduce1_t *inp);
-/** As hs_cell_introduce1_get_extensions, but take and return a const
+struct trn_cell_extension_st * trn_cell_introduce1_get_extensions(trn_cell_introduce1_t *inp);
+/** As trn_cell_introduce1_get_extensions, but take and return a const
  * pointer
  */
-const struct cell_extension_st * hs_cell_introduce1_getconst_extensions(const hs_cell_introduce1_t *inp);
-/** Set the value of the extensions field of the hs_cell_introduce1_t
+const struct trn_cell_extension_st * trn_cell_introduce1_getconst_extensions(const trn_cell_introduce1_t *inp);
+/** Set the value of the extensions field of the trn_cell_introduce1_t
  * in 'inp' to 'val'. Free the old value if any. Steals the
  * referenceto 'val'.Return 0 on success; return -1 and set the error
  * code on 'inp' on failure.
  */
-int hs_cell_introduce1_set_extensions(hs_cell_introduce1_t *inp, struct cell_extension_st *val);
-/** As hs_cell_introduce1_set_extensions, but does not free the
+int trn_cell_introduce1_set_extensions(trn_cell_introduce1_t *inp, struct trn_cell_extension_st *val);
+/** As trn_cell_introduce1_set_extensions, but does not free the
  * previous value.
  */
-int hs_cell_introduce1_set0_extensions(hs_cell_introduce1_t *inp, struct cell_extension_st *val);
+int trn_cell_introduce1_set0_extensions(trn_cell_introduce1_t *inp, struct trn_cell_extension_st *val);
 /** Return the length of the dynamic array holding the encrypted field
- * of the hs_cell_introduce1_t in 'inp'.
+ * of the trn_cell_introduce1_t in 'inp'.
  */
-size_t hs_cell_introduce1_getlen_encrypted(const hs_cell_introduce1_t *inp);
+size_t trn_cell_introduce1_getlen_encrypted(const trn_cell_introduce1_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * encrypted of the hs_cell_introduce1_t in 'inp'.
+ * encrypted of the trn_cell_introduce1_t in 'inp'.
  */
-uint8_t hs_cell_introduce1_get_encrypted(hs_cell_introduce1_t *inp, size_t idx);
-/** As hs_cell_introduce1_get_encrypted, but take and return a const
+uint8_t trn_cell_introduce1_get_encrypted(trn_cell_introduce1_t *inp, size_t idx);
+/** As trn_cell_introduce1_get_encrypted, but take and return a const
  * pointer
  */
-uint8_t hs_cell_introduce1_getconst_encrypted(const hs_cell_introduce1_t *inp, size_t idx);
+uint8_t trn_cell_introduce1_getconst_encrypted(const trn_cell_introduce1_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * encrypted of the hs_cell_introduce1_t in 'inp', so that it will
+ * encrypted of the trn_cell_introduce1_t in 'inp', so that it will
  * hold the value 'elt'.
  */
-int hs_cell_introduce1_set_encrypted(hs_cell_introduce1_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce1_set_encrypted(trn_cell_introduce1_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field encrypted of
- * the hs_cell_introduce1_t in 'inp'.
+ * the trn_cell_introduce1_t in 'inp'.
  */
-int hs_cell_introduce1_add_encrypted(hs_cell_introduce1_t *inp, uint8_t elt);
+int trn_cell_introduce1_add_encrypted(trn_cell_introduce1_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field encrypted of
  * 'inp'.
  */
-uint8_t * hs_cell_introduce1_getarray_encrypted(hs_cell_introduce1_t *inp);
-/** As hs_cell_introduce1_get_encrypted, but take and return a const
+uint8_t * trn_cell_introduce1_getarray_encrypted(trn_cell_introduce1_t *inp);
+/** As trn_cell_introduce1_get_encrypted, but take and return a const
  * pointer
  */
-const uint8_t  * hs_cell_introduce1_getconstarray_encrypted(const hs_cell_introduce1_t *inp);
+const uint8_t  * trn_cell_introduce1_getconstarray_encrypted(const trn_cell_introduce1_t *inp);
 /** Change the length of the variable-length array field encrypted of
  * 'inp' to 'newlen'.Fill extra elements with 0. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce1_setlen_encrypted(hs_cell_introduce1_t *inp, size_t newlen);
-/** Return a newly allocated hs_cell_introduce_ack with all elements
+int trn_cell_introduce1_setlen_encrypted(trn_cell_introduce1_t *inp, size_t newlen);
+/** Return a newly allocated trn_cell_introduce_ack with all elements
  * set to zero.
  */
-hs_cell_introduce_ack_t *hs_cell_introduce_ack_new(void);
-/** Release all storage held by the hs_cell_introduce_ack in 'victim'.
- * (Do nothing if 'victim' is NULL.)
+trn_cell_introduce_ack_t *trn_cell_introduce_ack_new(void);
+/** Release all storage held by the trn_cell_introduce_ack in
+ * 'victim'. (Do nothing if 'victim' is NULL.)
  */
-void hs_cell_introduce_ack_free(hs_cell_introduce_ack_t *victim);
-/** Try to parse a hs_cell_introduce_ack from the buffer in 'input',
+void trn_cell_introduce_ack_free(trn_cell_introduce_ack_t *victim);
+/** Try to parse a trn_cell_introduce_ack from the buffer in 'input',
  * using up to 'len_in' bytes from the input buffer. On success,
  * return the number of bytes consumed and set *output to the newly
- * allocated hs_cell_introduce_ack_t. On failure, return -2 if the
+ * allocated trn_cell_introduce_ack_t. On failure, return -2 if the
  * input appears truncated, and -1 if the input is otherwise invalid.
  */
-ssize_t hs_cell_introduce_ack_parse(hs_cell_introduce_ack_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_introduce_ack_parse(trn_cell_introduce_ack_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * hs_cell_introduce_ack in 'obj'. On failure, return a negative
+ * trn_cell_introduce_ack in 'obj'. On failure, return a negative
  * value. Note that this value may be an overestimate, and can even be
  * an underestimate for certain unencodeable objects.
  */
-ssize_t hs_cell_introduce_ack_encoded_len(const hs_cell_introduce_ack_t *obj);
-/** Try to encode the hs_cell_introduce_ack from 'input' into the
+ssize_t trn_cell_introduce_ack_encoded_len(const trn_cell_introduce_ack_t *obj);
+/** Try to encode the trn_cell_introduce_ack from 'input' into the
  * buffer at 'output', using up to 'avail' bytes of the output buffer.
  * On success, return the number of bytes used. On failure, return -2
  * if the buffer was not long enough, and -1 if the input was invalid.
  */
-ssize_t hs_cell_introduce_ack_encode(uint8_t *output, size_t avail, const hs_cell_introduce_ack_t *input);
-/** Check whether the internal state of the hs_cell_introduce_ack in
+ssize_t trn_cell_introduce_ack_encode(uint8_t *output, size_t avail, const trn_cell_introduce_ack_t *input);
+/** Check whether the internal state of the trn_cell_introduce_ack in
  * 'obj' is consistent. Return NULL if it is, and a short message if
  * it is not.
  */
-const char *hs_cell_introduce_ack_check(const hs_cell_introduce_ack_t *obj);
+const char *trn_cell_introduce_ack_check(const trn_cell_introduce_ack_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int hs_cell_introduce_ack_clear_errors(hs_cell_introduce_ack_t *obj);
+int trn_cell_introduce_ack_clear_errors(trn_cell_introduce_ack_t *obj);
 /** Return the value of the status field of the
- * hs_cell_introduce_ack_t in 'inp'
+ * trn_cell_introduce_ack_t in 'inp'
  */
-uint16_t hs_cell_introduce_ack_get_status(const hs_cell_introduce_ack_t *inp);
-/** Set the value of the status field of the hs_cell_introduce_ack_t
+uint16_t trn_cell_introduce_ack_get_status(const trn_cell_introduce_ack_t *inp);
+/** Set the value of the status field of the trn_cell_introduce_ack_t
  * in 'inp' to 'val'. Return 0 on success; return -1 and set the error
  * code on 'inp' on failure.
  */
-int hs_cell_introduce_ack_set_status(hs_cell_introduce_ack_t *inp, uint16_t val);
+int trn_cell_introduce_ack_set_status(trn_cell_introduce_ack_t *inp, uint16_t val);
 /** Return the value of the extensions field of the
- * hs_cell_introduce_ack_t in 'inp'
+ * trn_cell_introduce_ack_t in 'inp'
  */
-struct cell_extension_st * hs_cell_introduce_ack_get_extensions(hs_cell_introduce_ack_t *inp);
-/** As hs_cell_introduce_ack_get_extensions, but take and return a
+struct trn_cell_extension_st * trn_cell_introduce_ack_get_extensions(trn_cell_introduce_ack_t *inp);
+/** As trn_cell_introduce_ack_get_extensions, but take and return a
  * const pointer
  */
-const struct cell_extension_st * hs_cell_introduce_ack_getconst_extensions(const hs_cell_introduce_ack_t *inp);
+const struct trn_cell_extension_st * trn_cell_introduce_ack_getconst_extensions(const trn_cell_introduce_ack_t *inp);
 /** Set the value of the extensions field of the
- * hs_cell_introduce_ack_t in 'inp' to 'val'. Free the old value if
+ * trn_cell_introduce_ack_t in 'inp' to 'val'. Free the old value if
  * any. Steals the referenceto 'val'.Return 0 on success; return -1
  * and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_ack_set_extensions(hs_cell_introduce_ack_t *inp, struct cell_extension_st *val);
-/** As hs_cell_introduce_ack_set_extensions, but does not free the
+int trn_cell_introduce_ack_set_extensions(trn_cell_introduce_ack_t *inp, struct trn_cell_extension_st *val);
+/** As trn_cell_introduce_ack_set_extensions, but does not free the
  * previous value.
  */
-int hs_cell_introduce_ack_set0_extensions(hs_cell_introduce_ack_t *inp, struct cell_extension_st *val);
-/** Return a newly allocated hs_cell_introduce_encrypted with all
+int trn_cell_introduce_ack_set0_extensions(trn_cell_introduce_ack_t *inp, struct trn_cell_extension_st *val);
+/** Return a newly allocated trn_cell_introduce_encrypted with all
  * elements set to zero.
  */
-hs_cell_introduce_encrypted_t *hs_cell_introduce_encrypted_new(void);
-/** Release all storage held by the hs_cell_introduce_encrypted in
+trn_cell_introduce_encrypted_t *trn_cell_introduce_encrypted_new(void);
+/** Release all storage held by the trn_cell_introduce_encrypted in
  * 'victim'. (Do nothing if 'victim' is NULL.)
  */
-void hs_cell_introduce_encrypted_free(hs_cell_introduce_encrypted_t *victim);
-/** Try to parse a hs_cell_introduce_encrypted from the buffer in
+void trn_cell_introduce_encrypted_free(trn_cell_introduce_encrypted_t *victim);
+/** Try to parse a trn_cell_introduce_encrypted from the buffer in
  * 'input', using up to 'len_in' bytes from the input buffer. On
  * success, return the number of bytes consumed and set *output to the
- * newly allocated hs_cell_introduce_encrypted_t. On failure, return
+ * newly allocated trn_cell_introduce_encrypted_t. On failure, return
  * -2 if the input appears truncated, and -1 if the input is otherwise
  * invalid.
  */
-ssize_t hs_cell_introduce_encrypted_parse(hs_cell_introduce_encrypted_t **output, const uint8_t *input, const size_t len_in);
+ssize_t trn_cell_introduce_encrypted_parse(trn_cell_introduce_encrypted_t **output, const uint8_t *input, const size_t len_in);
 /** Return the number of bytes we expect to need to encode the
- * hs_cell_introduce_encrypted in 'obj'. On failure, return a negative
- * value. Note that this value may be an overestimate, and can even be
- * an underestimate for certain unencodeable objects.
+ * trn_cell_introduce_encrypted in 'obj'. On failure, return a
+ * negative value. Note that this value may be an overestimate, and
+ * can even be an underestimate for certain unencodeable objects.
  */
-ssize_t hs_cell_introduce_encrypted_encoded_len(const hs_cell_introduce_encrypted_t *obj);
-/** Try to encode the hs_cell_introduce_encrypted from 'input' into
+ssize_t trn_cell_introduce_encrypted_encoded_len(const trn_cell_introduce_encrypted_t *obj);
+/** Try to encode the trn_cell_introduce_encrypted from 'input' into
  * the buffer at 'output', using up to 'avail' bytes of the output
  * buffer. On success, return the number of bytes used. On failure,
  * return -2 if the buffer was not long enough, and -1 if the input
  * was invalid.
  */
-ssize_t hs_cell_introduce_encrypted_encode(uint8_t *output, size_t avail, const hs_cell_introduce_encrypted_t *input);
+ssize_t trn_cell_introduce_encrypted_encode(uint8_t *output, size_t avail, const trn_cell_introduce_encrypted_t *input);
 /** Check whether the internal state of the
- * hs_cell_introduce_encrypted in 'obj' is consistent. Return NULL if
+ * trn_cell_introduce_encrypted in 'obj' is consistent. Return NULL if
  * it is, and a short message if it is not.
  */
-const char *hs_cell_introduce_encrypted_check(const hs_cell_introduce_encrypted_t *obj);
+const char *trn_cell_introduce_encrypted_check(const trn_cell_introduce_encrypted_t *obj);
 /** Clear any errors that were set on the object 'obj' by its setter
  * functions. Return true iff errors were cleared.
  */
-int hs_cell_introduce_encrypted_clear_errors(hs_cell_introduce_encrypted_t *obj);
+int trn_cell_introduce_encrypted_clear_errors(trn_cell_introduce_encrypted_t *obj);
 /** Return the (constant) length of the array holding the rend_cookie
- * field of the hs_cell_introduce_encrypted_t in 'inp'.
+ * field of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-size_t hs_cell_introduce_encrypted_getlen_rend_cookie(const hs_cell_introduce_encrypted_t *inp);
+size_t trn_cell_introduce_encrypted_getlen_rend_cookie(const trn_cell_introduce_encrypted_t *inp);
 /** Return the element at position 'idx' of the fixed array field
- * rend_cookie of the hs_cell_introduce_encrypted_t in 'inp'.
+ * rend_cookie of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-uint8_t hs_cell_introduce_encrypted_get_rend_cookie(hs_cell_introduce_encrypted_t *inp, size_t idx);
-/** As hs_cell_introduce_encrypted_get_rend_cookie, but take and
+uint8_t trn_cell_introduce_encrypted_get_rend_cookie(trn_cell_introduce_encrypted_t *inp, size_t idx);
+/** As trn_cell_introduce_encrypted_get_rend_cookie, but take and
  * return a const pointer
  */
-uint8_t hs_cell_introduce_encrypted_getconst_rend_cookie(const hs_cell_introduce_encrypted_t *inp, size_t idx);
+uint8_t trn_cell_introduce_encrypted_getconst_rend_cookie(const trn_cell_introduce_encrypted_t *inp, size_t idx);
 /** Change the element at position 'idx' of the fixed array field
- * rend_cookie of the hs_cell_introduce_encrypted_t in 'inp', so that
+ * rend_cookie of the trn_cell_introduce_encrypted_t in 'inp', so that
  * it will hold the value 'elt'.
  */
-int hs_cell_introduce_encrypted_set_rend_cookie(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce_encrypted_set_rend_cookie(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
 /** Return a pointer to the TRUNNEL_REND_COOKIE_LEN-element array
  * field rend_cookie of 'inp'.
  */
-uint8_t * hs_cell_introduce_encrypted_getarray_rend_cookie(hs_cell_introduce_encrypted_t *inp);
-/** As hs_cell_introduce_encrypted_get_rend_cookie, but take and
+uint8_t * trn_cell_introduce_encrypted_getarray_rend_cookie(trn_cell_introduce_encrypted_t *inp);
+/** As trn_cell_introduce_encrypted_get_rend_cookie, but take and
  * return a const pointer
  */
-const uint8_t  * hs_cell_introduce_encrypted_getconstarray_rend_cookie(const hs_cell_introduce_encrypted_t *inp);
+const uint8_t  * trn_cell_introduce_encrypted_getconstarray_rend_cookie(const trn_cell_introduce_encrypted_t *inp);
 /** Return the value of the extensions field of the
- * hs_cell_introduce_encrypted_t in 'inp'
+ * trn_cell_introduce_encrypted_t in 'inp'
  */
-struct cell_extension_st * hs_cell_introduce_encrypted_get_extensions(hs_cell_introduce_encrypted_t *inp);
-/** As hs_cell_introduce_encrypted_get_extensions, but take and return
- * a const pointer
+struct trn_cell_extension_st * trn_cell_introduce_encrypted_get_extensions(trn_cell_introduce_encrypted_t *inp);
+/** As trn_cell_introduce_encrypted_get_extensions, but take and
+ * return a const pointer
  */
-const struct cell_extension_st * hs_cell_introduce_encrypted_getconst_extensions(const hs_cell_introduce_encrypted_t *inp);
+const struct trn_cell_extension_st * trn_cell_introduce_encrypted_getconst_extensions(const trn_cell_introduce_encrypted_t *inp);
 /** Set the value of the extensions field of the
- * hs_cell_introduce_encrypted_t in 'inp' to 'val'. Free the old value
- * if any. Steals the referenceto 'val'.Return 0 on success; return -1
- * and set the error code on 'inp' on failure.
+ * trn_cell_introduce_encrypted_t in 'inp' to 'val'. Free the old
+ * value if any. Steals the referenceto 'val'.Return 0 on success;
+ * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_set_extensions(hs_cell_introduce_encrypted_t *inp, struct cell_extension_st *val);
-/** As hs_cell_introduce_encrypted_set_extensions, but does not free
+int trn_cell_introduce_encrypted_set_extensions(trn_cell_introduce_encrypted_t *inp, struct trn_cell_extension_st *val);
+/** As trn_cell_introduce_encrypted_set_extensions, but does not free
  * the previous value.
  */
-int hs_cell_introduce_encrypted_set0_extensions(hs_cell_introduce_encrypted_t *inp, struct cell_extension_st *val);
+int trn_cell_introduce_encrypted_set0_extensions(trn_cell_introduce_encrypted_t *inp, struct trn_cell_extension_st *val);
 /** Return the value of the onion_key_type field of the
- * hs_cell_introduce_encrypted_t in 'inp'
+ * trn_cell_introduce_encrypted_t in 'inp'
  */
-uint8_t hs_cell_introduce_encrypted_get_onion_key_type(const hs_cell_introduce_encrypted_t *inp);
+uint8_t trn_cell_introduce_encrypted_get_onion_key_type(const trn_cell_introduce_encrypted_t *inp);
 /** Set the value of the onion_key_type field of the
- * hs_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
+ * trn_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
  * success; return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_set_onion_key_type(hs_cell_introduce_encrypted_t *inp, uint8_t val);
+int trn_cell_introduce_encrypted_set_onion_key_type(trn_cell_introduce_encrypted_t *inp, uint8_t val);
 /** Return the value of the onion_key_len field of the
- * hs_cell_introduce_encrypted_t in 'inp'
+ * trn_cell_introduce_encrypted_t in 'inp'
  */
-uint16_t hs_cell_introduce_encrypted_get_onion_key_len(const hs_cell_introduce_encrypted_t *inp);
+uint16_t trn_cell_introduce_encrypted_get_onion_key_len(const trn_cell_introduce_encrypted_t *inp);
 /** Set the value of the onion_key_len field of the
- * hs_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
+ * trn_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
  * success; return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_set_onion_key_len(hs_cell_introduce_encrypted_t *inp, uint16_t val);
+int trn_cell_introduce_encrypted_set_onion_key_len(trn_cell_introduce_encrypted_t *inp, uint16_t val);
 /** Return the length of the dynamic array holding the onion_key field
- * of the hs_cell_introduce_encrypted_t in 'inp'.
+ * of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-size_t hs_cell_introduce_encrypted_getlen_onion_key(const hs_cell_introduce_encrypted_t *inp);
+size_t trn_cell_introduce_encrypted_getlen_onion_key(const trn_cell_introduce_encrypted_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * onion_key of the hs_cell_introduce_encrypted_t in 'inp'.
+ * onion_key of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-uint8_t hs_cell_introduce_encrypted_get_onion_key(hs_cell_introduce_encrypted_t *inp, size_t idx);
-/** As hs_cell_introduce_encrypted_get_onion_key, but take and return
+uint8_t trn_cell_introduce_encrypted_get_onion_key(trn_cell_introduce_encrypted_t *inp, size_t idx);
+/** As trn_cell_introduce_encrypted_get_onion_key, but take and return
  * a const pointer
  */
-uint8_t hs_cell_introduce_encrypted_getconst_onion_key(const hs_cell_introduce_encrypted_t *inp, size_t idx);
+uint8_t trn_cell_introduce_encrypted_getconst_onion_key(const trn_cell_introduce_encrypted_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * onion_key of the hs_cell_introduce_encrypted_t in 'inp', so that it
- * will hold the value 'elt'.
+ * onion_key of the trn_cell_introduce_encrypted_t in 'inp', so that
+ * it will hold the value 'elt'.
  */
-int hs_cell_introduce_encrypted_set_onion_key(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce_encrypted_set_onion_key(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field onion_key of
- * the hs_cell_introduce_encrypted_t in 'inp'.
+ * the trn_cell_introduce_encrypted_t in 'inp'.
  */
-int hs_cell_introduce_encrypted_add_onion_key(hs_cell_introduce_encrypted_t *inp, uint8_t elt);
+int trn_cell_introduce_encrypted_add_onion_key(trn_cell_introduce_encrypted_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field onion_key of
  * 'inp'.
  */
-uint8_t * hs_cell_introduce_encrypted_getarray_onion_key(hs_cell_introduce_encrypted_t *inp);
-/** As hs_cell_introduce_encrypted_get_onion_key, but take and return
+uint8_t * trn_cell_introduce_encrypted_getarray_onion_key(trn_cell_introduce_encrypted_t *inp);
+/** As trn_cell_introduce_encrypted_get_onion_key, but take and return
  * a const pointer
  */
-const uint8_t  * hs_cell_introduce_encrypted_getconstarray_onion_key(const hs_cell_introduce_encrypted_t *inp);
+const uint8_t  * trn_cell_introduce_encrypted_getconstarray_onion_key(const trn_cell_introduce_encrypted_t *inp);
 /** Change the length of the variable-length array field onion_key of
  * 'inp' to 'newlen'.Fill extra elements with 0. Return 0 on success;
  * return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_setlen_onion_key(hs_cell_introduce_encrypted_t *inp, size_t newlen);
+int trn_cell_introduce_encrypted_setlen_onion_key(trn_cell_introduce_encrypted_t *inp, size_t newlen);
 /** Return the value of the nspec field of the
- * hs_cell_introduce_encrypted_t in 'inp'
+ * trn_cell_introduce_encrypted_t in 'inp'
  */
-uint8_t hs_cell_introduce_encrypted_get_nspec(const hs_cell_introduce_encrypted_t *inp);
+uint8_t trn_cell_introduce_encrypted_get_nspec(const trn_cell_introduce_encrypted_t *inp);
 /** Set the value of the nspec field of the
- * hs_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
+ * trn_cell_introduce_encrypted_t in 'inp' to 'val'. Return 0 on
  * success; return -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_set_nspec(hs_cell_introduce_encrypted_t *inp, uint8_t val);
+int trn_cell_introduce_encrypted_set_nspec(trn_cell_introduce_encrypted_t *inp, uint8_t val);
 /** Return the length of the dynamic array holding the nspecs field of
- * the hs_cell_introduce_encrypted_t in 'inp'.
+ * the trn_cell_introduce_encrypted_t in 'inp'.
  */
-size_t hs_cell_introduce_encrypted_getlen_nspecs(const hs_cell_introduce_encrypted_t *inp);
+size_t trn_cell_introduce_encrypted_getlen_nspecs(const trn_cell_introduce_encrypted_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * nspecs of the hs_cell_introduce_encrypted_t in 'inp'.
+ * nspecs of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-struct link_specifier_st * hs_cell_introduce_encrypted_get_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx);
-/** As hs_cell_introduce_encrypted_get_nspecs, but take and return a
+struct link_specifier_st * trn_cell_introduce_encrypted_get_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx);
+/** As trn_cell_introduce_encrypted_get_nspecs, but take and return a
  * const pointer
  */
- const struct link_specifier_st * hs_cell_introduce_encrypted_getconst_nspecs(const hs_cell_introduce_encrypted_t *inp, size_t idx);
+ const struct link_specifier_st * trn_cell_introduce_encrypted_getconst_nspecs(const trn_cell_introduce_encrypted_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * nspecs of the hs_cell_introduce_encrypted_t in 'inp', so that it
+ * nspecs of the trn_cell_introduce_encrypted_t in 'inp', so that it
  * will hold the value 'elt'. Free the previous value, if any.
  */
-int hs_cell_introduce_encrypted_set_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt);
-/** As hs_cell_introduce_encrypted_set_nspecs, but does not free the
+int trn_cell_introduce_encrypted_set_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt);
+/** As trn_cell_introduce_encrypted_set_nspecs, but does not free the
  * previous value.
  */
-int hs_cell_introduce_encrypted_set0_nspecs(hs_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt);
+int trn_cell_introduce_encrypted_set0_nspecs(trn_cell_introduce_encrypted_t *inp, size_t idx, struct link_specifier_st * elt);
 /** Append a new element 'elt' to the dynamic array field nspecs of
- * the hs_cell_introduce_encrypted_t in 'inp'.
+ * the trn_cell_introduce_encrypted_t in 'inp'.
  */
-int hs_cell_introduce_encrypted_add_nspecs(hs_cell_introduce_encrypted_t *inp, struct link_specifier_st * elt);
+int trn_cell_introduce_encrypted_add_nspecs(trn_cell_introduce_encrypted_t *inp, struct link_specifier_st * elt);
 /** Return a pointer to the variable-length array field nspecs of
  * 'inp'.
  */
-struct link_specifier_st * * hs_cell_introduce_encrypted_getarray_nspecs(hs_cell_introduce_encrypted_t *inp);
-/** As hs_cell_introduce_encrypted_get_nspecs, but take and return a
+struct link_specifier_st * * trn_cell_introduce_encrypted_getarray_nspecs(trn_cell_introduce_encrypted_t *inp);
+/** As trn_cell_introduce_encrypted_get_nspecs, but take and return a
  * const pointer
  */
-const struct link_specifier_st *  const  * hs_cell_introduce_encrypted_getconstarray_nspecs(const hs_cell_introduce_encrypted_t *inp);
+const struct link_specifier_st *  const  * trn_cell_introduce_encrypted_getconstarray_nspecs(const trn_cell_introduce_encrypted_t *inp);
 /** Change the length of the variable-length array field nspecs of
  * 'inp' to 'newlen'.Fill extra elements with NULL; free removed
  * elements. Return 0 on success; return -1 and set the error code on
  * 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_setlen_nspecs(hs_cell_introduce_encrypted_t *inp, size_t newlen);
+int trn_cell_introduce_encrypted_setlen_nspecs(trn_cell_introduce_encrypted_t *inp, size_t newlen);
 /** Return the length of the dynamic array holding the pad field of
- * the hs_cell_introduce_encrypted_t in 'inp'.
+ * the trn_cell_introduce_encrypted_t in 'inp'.
  */
-size_t hs_cell_introduce_encrypted_getlen_pad(const hs_cell_introduce_encrypted_t *inp);
+size_t trn_cell_introduce_encrypted_getlen_pad(const trn_cell_introduce_encrypted_t *inp);
 /** Return the element at position 'idx' of the dynamic array field
- * pad of the hs_cell_introduce_encrypted_t in 'inp'.
+ * pad of the trn_cell_introduce_encrypted_t in 'inp'.
  */
-uint8_t hs_cell_introduce_encrypted_get_pad(hs_cell_introduce_encrypted_t *inp, size_t idx);
-/** As hs_cell_introduce_encrypted_get_pad, but take and return a
+uint8_t trn_cell_introduce_encrypted_get_pad(trn_cell_introduce_encrypted_t *inp, size_t idx);
+/** As trn_cell_introduce_encrypted_get_pad, but take and return a
  * const pointer
  */
-uint8_t hs_cell_introduce_encrypted_getconst_pad(const hs_cell_introduce_encrypted_t *inp, size_t idx);
+uint8_t trn_cell_introduce_encrypted_getconst_pad(const trn_cell_introduce_encrypted_t *inp, size_t idx);
 /** Change the element at position 'idx' of the dynamic array field
- * pad of the hs_cell_introduce_encrypted_t in 'inp', so that it will
+ * pad of the trn_cell_introduce_encrypted_t in 'inp', so that it will
  * hold the value 'elt'.
  */
-int hs_cell_introduce_encrypted_set_pad(hs_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
+int trn_cell_introduce_encrypted_set_pad(trn_cell_introduce_encrypted_t *inp, size_t idx, uint8_t elt);
 /** Append a new element 'elt' to the dynamic array field pad of the
- * hs_cell_introduce_encrypted_t in 'inp'.
+ * trn_cell_introduce_encrypted_t in 'inp'.
  */
-int hs_cell_introduce_encrypted_add_pad(hs_cell_introduce_encrypted_t *inp, uint8_t elt);
+int trn_cell_introduce_encrypted_add_pad(trn_cell_introduce_encrypted_t *inp, uint8_t elt);
 /** Return a pointer to the variable-length array field pad of 'inp'.
  */
-uint8_t * hs_cell_introduce_encrypted_getarray_pad(hs_cell_introduce_encrypted_t *inp);
-/** As hs_cell_introduce_encrypted_get_pad, but take and return a
+uint8_t * trn_cell_introduce_encrypted_getarray_pad(trn_cell_introduce_encrypted_t *inp);
+/** As trn_cell_introduce_encrypted_get_pad, but take and return a
  * const pointer
  */
-const uint8_t  * hs_cell_introduce_encrypted_getconstarray_pad(const hs_cell_introduce_encrypted_t *inp);
+const uint8_t  * trn_cell_introduce_encrypted_getconstarray_pad(const trn_cell_introduce_encrypted_t *inp);
 /** Change the length of the variable-length array field pad of 'inp'
  * to 'newlen'.Fill extra elements with 0. Return 0 on success; return
  * -1 and set the error code on 'inp' on failure.
  */
-int hs_cell_introduce_encrypted_setlen_pad(hs_cell_introduce_encrypted_t *inp, size_t newlen);
+int trn_cell_introduce_encrypted_setlen_pad(trn_cell_introduce_encrypted_t *inp, size_t newlen);
 
 
 #endif
diff --git a/src/trunnel/hs/cell_introduce1.trunnel b/src/trunnel/hs/cell_introduce1.trunnel
index f7776879cd..7577c1526f 100644
--- a/src/trunnel/hs/cell_introduce1.trunnel
+++ b/src/trunnel/hs/cell_introduce1.trunnel
@@ -5,7 +5,7 @@
  */
 
 /* From cell_common.trunnel. */
-extern struct cell_extension;
+extern struct trn_cell_extension;
 /* From ed25519_cert.trunnel. */
 extern struct link_specifier;
 
@@ -13,7 +13,7 @@ const TRUNNEL_SHA1_LEN = 20;
 const TRUNNEL_REND_COOKIE_LEN = 20;
 
 /* INTRODUCE1 payload. See details in section 3.2.1. */
-struct hs_cell_introduce1 {
+struct trn_cell_introduce1 {
   /* Always zeroed. MUST be checked explicitely by the caller. */
   u8 legacy_key_id[TRUNNEL_SHA1_LEN];
 
@@ -23,28 +23,28 @@ struct hs_cell_introduce1 {
   u8 auth_key[auth_key_len];
 
   /* Extension(s). Reserved fields. */
-  struct cell_extension extensions;
+  struct trn_cell_extension extensions;
 
   /* Variable length, up to the end of cell. */
   u8 encrypted[];
 };
 
 /* INTRODUCE_ACK payload. See details in section 3.2.2. */
-struct hs_cell_introduce_ack {
+struct trn_cell_introduce_ack {
   /* Status of introduction. */
   u16 status IN [0x0000, 0x0001, 0x0002];
 
   /* Extension(s). Reserved fields. */
-  struct cell_extension extensions;
+  struct trn_cell_extension extensions;
 };
 
 /* Encrypted section of the INTRODUCE1/INTRODUCE2 cell. */
-struct hs_cell_introduce_encrypted {
+struct trn_cell_introduce_encrypted {
   /* Rendezvous cookie. */
   u8 rend_cookie[TRUNNEL_REND_COOKIE_LEN];
 
   /* Extension(s). Reserved fields. */
-  struct cell_extension extensions;
+  struct trn_cell_extension extensions;
 
   /* Onion key material. */
   u8 onion_key_type IN [0x01];