1 files changed, 67 insertions, 0 deletions
diff --git a/src/or/protover.h b/src/or/protover.h
new file mode 100644
index 0000000000..075405e7ca
--- /dev/null
+++ b/src/or/protover.h
@@ -0,0 +1,67 @@
+
+#ifndef TOR_PROTOVER_H
+#define TOR_PROTOVER_H
+
+#include "container.h"
+
+/** The first version of Tor that included "proto" entries in its
+ * descriptors.  Authorities should use this to decide whether to
+ * guess proto lines. */
+/* This is a guess. */
+#define FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS "0.2.9.3-alpha"
+
+/** List of recognized subprotocols. */
+typedef enum protocol_type_t {
+  PRT_LINK,
+  PRT_LINKAUTH,
+  PRT_RELAY,
+  PRT_DIRCACHE,
+  PRT_HSDIR,
+  PRT_HSINTRO,
+  PRT_HSREND,
+  PRT_DESC,
+  PRT_MICRODESC,
+  PRT_CONS,
+} protocol_type_t;
+
+int protover_all_supported(const char *s, char **missing);
+int protover_is_supported_here(protocol_type_t pr, uint32_t ver);
+const char *protover_get_supported_protocols(void);
+
+char *protover_compute_vote(const smartlist_t *list_of_proto_strings,
+                            int threshold);
+const char *protover_compute_for_old_tor(const char *version);
+int protocol_list_supports_protocol(const char *list, protocol_type_t tp,
+                                    uint32_t version);
+
+void protover_free_all(void);
+
+#ifdef PROTOVER_PRIVATE
+/** Represents a range of subprotocols of a given type. All subprotocols
+ * between <b>low</b> and <b>high</b> inclusive are included. */
+typedef struct proto_range_t {
+  uint32_t low;
+  uint32_t high;
+} proto_range_t;
+
+/** Represents a set of ranges of subprotocols of a given type. */
+typedef struct proto_entry_t {
+  /** The name of the protocol.
+   *
+   * (This needs to handle voting on protocols which
+   * we don't recognize yet, so it's a char* rather than a protocol_type_t.)
+   */
+  char *name;
+  /** Smartlist of proto_range_t */
+  smartlist_t *ranges;
+} proto_entry_t;
+
+STATIC smartlist_t *parse_protocol_list(const char *s);
+STATIC void proto_entry_free(proto_entry_t *entry);
+STATIC char *encode_protocol_list(const smartlist_t *sl);
+STATIC const char *protocol_type_to_str(protocol_type_t pr);
+STATIC int str_to_protocol_type(const char *s, protocol_type_t *pr_out);
+#endif
+
+#endif
+