1 files changed, 87 insertions, 0 deletions
diff --git a/src/feature/relay/circuitbuild_relay.h b/src/feature/relay/circuitbuild_relay.h
new file mode 100644
index 0000000000..0783161538
--- /dev/null
+++ b/src/feature/relay/circuitbuild_relay.h
@@ -0,0 +1,87 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2020, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * @file circuitbuild_relay.h
+ * @brief Header for feature/relay/circuitbuild_relay.c
+ **/
+
+#ifndef TOR_FEATURE_RELAY_CIRCUITBUILD_RELAY_H
+#define TOR_FEATURE_RELAY_CIRCUITBUILD_RELAY_H
+
+#include "lib/cc/torint.h"
+#include "lib/log/log.h"
+
+#include "app/config/config.h"
+
+struct cell_t;
+struct created_cell_t;
+
+struct circuit_t;
+struct or_circuit_t;
+struct extend_cell_t;
+
+/* Log a protocol warning about getting an extend cell on a client. */
+static inline void
+circuitbuild_warn_client_extend(void)
+{
+  log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL,
+         "Got an extend cell, but running as a client. Closing.");
+}
+
+#ifdef HAVE_MODULE_RELAY
+
+int circuit_extend(struct cell_t *cell, struct circuit_t *circ);
+
+int onionskin_answer(struct or_circuit_t *circ,
+                     const struct created_cell_t *created_cell,
+                     const char *keys, size_t keys_len,
+                     const uint8_t *rend_circ_nonce);
+
+#else /* !defined(HAVE_MODULE_RELAY) */
+
+static inline int
+circuit_extend(struct cell_t *cell, struct circuit_t *circ)
+{
+  (void)cell;
+  (void)circ;
+  circuitbuild_warn_client_extend();
+  return -1;
+}
+
+static inline int
+onionskin_answer(struct or_circuit_t *circ,
+                 const struct created_cell_t *created_cell,
+                 const char *keys, size_t keys_len,
+                 const uint8_t *rend_circ_nonce)
+{
+  (void)circ;
+  (void)created_cell;
+  (void)keys;
+  (void)keys_len;
+  (void)rend_circ_nonce;
+  tor_assert_nonfatal_unreached();
+  return -1;
+}
+
+#endif /* defined(HAVE_MODULE_RELAY) */
+
+#ifdef TOR_UNIT_TESTS
+
+STATIC int circuit_extend_state_valid_helper(const struct circuit_t *circ);
+STATIC int circuit_extend_add_ed25519_helper(struct extend_cell_t *ec);
+STATIC int circuit_extend_lspec_valid_helper(const struct extend_cell_t *ec,
+                                             const struct circuit_t *circ);
+STATIC const tor_addr_port_t * circuit_choose_ip_ap_for_extend(
+                                             const tor_addr_port_t *ipv4_ap,
+                                             const tor_addr_port_t *ipv6_ap);
+STATIC void circuit_open_connection_for_extend(const struct extend_cell_t *ec,
+                                               struct circuit_t *circ,
+                                               int should_launch);
+
+#endif /* defined(TOR_UNIT_TESTS) */
+
+#endif /* !defined(TOR_FEATURE_RELAY_CIRCUITBUILD_RELAY_H) */