1 files changed, 111 insertions, 0 deletions
diff --git a/src/or/protover_rust.c b/src/or/protover_rust.c
new file mode 100644
index 0000000000..ebe815357b
--- /dev/null
+++ b/src/or/protover_rust.c
@@ -0,0 +1,111 @@
+/* Copyright (c) 2016-2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/*
+ * \file protover_rust.c
+ * \brief Provide a C wrapper for functions exposed in /src/rust/protover,
+ * and safe translation/handling between the Rust/C boundary.
+ */
+
+#include "or.h"
+#include "protover.h"
+#include "rust_types.h"
+
+#ifdef HAVE_RUST
+
+int rust_protover_all_supported(const char *s, char **missing);
+rust_str_ref_t rust_protover_compute_for_old_tor(const char *version);
+rust_str_ref_t rust_protover_compute_vote(const smartlist_t *proto_votes,
+                                          int threshold);
+rust_str_ref_t rust_protover_get_supported_protocols(void);
+int rust_protocol_list_supports_protocol(const char *list, protocol_type_t tp,
+                                         uint32_t version);
+int rust_protover_is_supported_here(protocol_type_t pr, uint32_t ver);
+
+/* Define for compatibility, used in main.c */
+void protover_free_all(void) {};
+
+/*
+ * Wrap rust_protover_is_supported_here, located in /src/rust/protover
+ */
+int
+protover_is_supported_here(protocol_type_t pr, uint32_t ver)
+{
+  return rust_protover_is_supported_here(pr, ver);
+}
+
+/*
+ * Wrap rust_protover_list_supports_protocol, located  in /src/rust/protover
+ */
+int
+protocol_list_supports_protocol(const char *list, protocol_type_t tp,
+                                uint32_t version)
+{
+  return rust_protocol_list_supports_protocol(list, tp, version);
+}
+
+/*
+ * Wrap rust_protover_get_supported_protocols, located in /src/rust/protover
+ */
+const char *
+protover_get_supported_protocols(void)
+{
+  rust_str_ref_t rust_protocols = rust_protover_get_supported_protocols();
+
+  char *protocols = NULL;
+  if (rust_protocols != NULL) {
+    move_rust_str_to_c_and_free(rust_protocols, &protocols);
+  }
+  return protocols;
+}
+
+/*
+ * Wrap rust_protover_compute_vote, located in /src/rust/protover
+ */
+char *
+protover_compute_vote(const smartlist_t *proto_strings,
+                      int threshold)
+{
+  rust_str_ref_t rust_protocols = rust_protover_compute_vote(proto_strings,
+                                                             threshold);
+
+  char *protocols = NULL;
+  if (rust_protocols != NULL) {
+    move_rust_str_to_c_and_free(rust_protocols, &protocols);
+  }
+  return protocols;
+}
+
+/*
+ * Wrap rust_protover_all_supported, located in /src/rust/protover
+ */
+int
+protover_all_supported(const char *s, char **missing_out)
+{
+  rust_str_ref_t missing_out_copy = NULL;
+  int is_supported  = rust_protover_all_supported(s, &missing_out_copy);
+
+  if (!is_supported) {
+    move_rust_str_to_c_and_free(missing_out_copy, missing_out);
+  }
+
+  return is_supported;
+}
+
+/*
+ * Wrap rust_compute_for_old_tor, located in /src/rust/protover
+ */
+const char *
+protover_compute_for_old_tor(const char *version)
+{
+  rust_str_ref_t rust_protocols = rust_protover_compute_for_old_tor(version);
+
+  char *protocols = NULL;
+  if (rust_protocols != NULL) {
+    move_rust_str_to_c_and_free(rust_protocols, &protocols);
+  }
+  return protocols;
+}
+
+#endif
+