From 415e2384ff0cb3c98ef942a2a99085f9427b18a4 Mon Sep 17 00:00:00 2001
From: Stephan Rotolante <stephanrotolante@gmail.com>
Date: Wed, 11 Sep 2024 11:06:24 -0400
Subject: [PATCH] Implement peer_connection_add_ice_candidate

Resolves #63
---
 src/ice.c             |  8 +++++++-
 src/peer_connection.c | 10 ++++++++++
 src/peer_connection.h |  7 +++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/ice.c b/src/ice.c
index 77dfcde..a54ea57 100644
--- a/src/ice.c
+++ b/src/ice.c
@@ -79,10 +79,16 @@ void ice_candidate_to_description(IceCandidate* candidate, char* description, in
 }
 
 int ice_candidate_from_description(IceCandidate* candidate, char* description, char* end) {
-  char* split_start = description + strlen("a=candidate:");
+  char* split_start = description;
   char* split_end = NULL;
   int index = 0;
   char buf[64];
+
+  if (strncmp("a=", split_start, strlen("a=")) == 0) {
+    split_start += strlen("a=");
+  }
+  split_start += strlen("candidate:");
+
   // a=candidate:448736988 1 udp 2122260223 172.17.0.1 49250 typ host generation 0 network-id 1 network-cost 50
   // a=candidate:udpcandidate 1 udp 120 192.168.1.102 8000 typ host
   while ((split_end = strstr(split_start, " ")) != NULL && split_start < end) {
diff --git a/src/peer_connection.c b/src/peer_connection.c
index 45b6b4c..e68a354 100644
--- a/src/peer_connection.c
+++ b/src/peer_connection.c
@@ -557,3 +557,13 @@ char* peer_connection_lookup_sid_label(PeerConnection* pc, uint16_t sid) {
   }
   return NULL;  // Not found
 }
+
+int peer_connection_add_ice_candidate(PeerConnection* pc, char* candidate) {
+  Agent* agent = &pc->agent;
+  if (ice_candidate_from_description(&agent->remote_candidates[agent->remote_candidates_count], candidate, candidate + strlen(candidate)) != 0) {
+    return -1;
+  }
+
+  agent->remote_candidates_count++;
+  return 0;
+}
diff --git a/src/peer_connection.h b/src/peer_connection.h
index ad0446c..d917884 100644
--- a/src/peer_connection.h
+++ b/src/peer_connection.h
@@ -144,6 +144,13 @@ int peer_connection_lookup_sid(PeerConnection* pc, const char* label, uint16_t*
 
 char* peer_connection_lookup_sid_label(PeerConnection* pc, uint16_t sid);
 
+/**
+ * @brief adds a new remote candidate to the peer connection
+ * @param[in] peer connection
+ * @param[in] ice candidate
+ */
+int peer_connection_add_ice_candidate(PeerConnection* pc, char* ice_candidate);
+
 #ifdef __cplusplus
 }
 #endif