int libwebrtc_set_offer( struct libwebrtc_connection* conn, const char* sdp ) {
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)conn;
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
ILibWrapper_WebRTC_Connection_GetUserData(connection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
// Microstack requires at least one candidate
std::string tmp;
if( strstr(sdp, "a=candidate") == NULL ) {
tmp = sdp;
tmp += "a=candidate:0 1 UDP 2128609534 0.0.0.0 0 typ host\n";
sdp = tmp.c_str();
}
char* offer = ILibWrapper_WebRTC_Connection_SetOffer(connection, (char*)sdp, strlen(sdp), &WebRTCOnIceCandidate);
if( offer == NULL )
return 0;
// always send this offer, as the callback will only send additianal candidates
ctx->callback(ctx, conn, NULL, LWRTC_CALLBACK_LOCAL_DESCRIPTION, user_data, offer, strlen(offer));
return 1;
}
// this is called for each ice candidate. if candidate is null, no additional candidates could be found.
void WebRTCOnIceCandidate(ILibWrapper_WebRTC_Connection webRTCConnection, struct sockaddr_in6* candidate) {
assert(webRTCConnection != NULL);
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)webRTCConnection;
ILibWrapper_WebRTC_Connection_GetUserData(webRTCConnection, (void**)&ctx, NULL, &user_data);
// no additional candidates found.
if( candidate == NULL )
return;
char* offer = ILibWrapper_WebRTC_Connection_AddServerReflexiveCandidateToLocalSDP( webRTCConnection, candidate );
if( offer == NULL ) {
ctx->callback(ctx, conn, NULL, LWRTC_CALLBACK_ERROR, user_data, NULL, 0 );
LOG("Offer failed, closing socket\n");
return;
}
free(offer);
char address[225];
ILibInet_ntop2((struct sockaddr*)candidate, address, 255);
const char* candidateFormat = "candidate:%d %d UDP %d %s %u typ host";
char buf[255] = {0};
snprintf(buf, sizeof(buf), candidateFormat, 0, 1, 2128609535-1, address, ntohs(candidate->sin6_port));
buf[sizeof(buf)-1] = 0;
ctx->callback(ctx, conn, NULL, LWRTC_CALLBACK_ICE_CANDIDATE, user_data, buf, strlen(buf) );
}
int libwebrtc_add_ice_candidate( struct libwebrtc_connection* conn, const char* candidate ) {
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)conn;
// updating the block seems to be causing some issues. disabled for now.
// if(true)return 1;
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
ILibWrapper_WebRTC_Connection_GetUserData(connection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
char address[255] = {0};
int port = 0;
// candidate:0 1 UDP 2128609534 0.0.0.0 0 typ host
sscanf(candidate, "%*s %*d %*s %*d %s %d %*s %*s", address, &port);
// todo, parse candidate into struct sockaddr_in6 and add to the offer...
char* offer = ILibWrapper_WebRTC_Connection_AddServerReflexiveCandidateToRemoteSDP(connection, address, port );
::libwebrtc_set_answer(conn, offer );
free(offer);
return 1;
}
void libwebrtc_close_connection( struct libwebrtc_connection* conn ) {
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)conn;
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
ILibWrapper_WebRTC_Connection_GetUserData(connection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
// this will trigger the callback for any existing channels.
ILibWrapper_WebRTC_Connection_Disconnect(connection);
// the connection object is now destroyed
}
struct libwebrtc_data_channel* libwebrtc_create_channel( struct libwebrtc_connection* c, const char* name )
{
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)c;
if( ! ILibWrapper_WebRTC_Connection_IsConnected( connection ) )
return NULL;
ILibWrapper_WebRTC_DataChannel* channel = ILibWrapper_WebRTC_DataChannel_Create(connection, (char*)name, strlen(name), &WebRTCOnDataChannelAck );
// Initially use parent user_data
ILibWrapper_WebRTC_Connection_GetUserData(connection, NULL, NULL, &channel->userData);
return (libwebrtc_data_channel*)channel;
}
// this is called when a channel receives data.
void WebRTCOnDataChannelData(struct ILibWrapper_WebRTC_DataChannel* dataChannel, char* data, int dataLen) {
assert(dataChannel != NULL);
assert(data != NULL);
assert(dataLen > 0);
void* user_data = dataChannel->userData;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)dataChannel->parent;
libwebrtc_data_channel* channel = (libwebrtc_data_channel*)dataChannel;
ILibWrapper_WebRTC_Connection_GetUserData(dataChannel->parent, (void**)&ctx, NULL, NULL);//&user_data);
assert( ctx != NULL );
ctx->callback( ctx, conn, channel, LWRTC_CALLBACK_CHANNEL_RECEIVE, user_data, data, dataLen );
}
void libwebrtc_close_channel( struct libwebrtc_data_channel* channel ) {
ILibWrapper_WebRTC_DataChannel* dataChannel = (ILibWrapper_WebRTC_DataChannel*)channel;
void* user_data = dataChannel->userData;
libwebrtc_context* ctx = NULL;
//libwebrtc_connection* conn = (libwebrtc_connection*)dataChannel->parent;
ILibWrapper_WebRTC_Connection_GetUserData(dataChannel->parent, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
// still unsure if this will trigger a channelClosed or not.
ILibWrapper_WebRTC_DataChannel_Close(dataChannel);
// uncomment this if its not triggered by above...
//ctx->callback( ctx, conn, channel, LWRTC_CALLBACK_CHANNEL_CLOSED, user_data, 0, 0 );
}
// This is called when the DataChannel is closed
void WebRTCOnDataChannelClosed(ILibWrapper_WebRTC_DataChannel *dataChannel)
{
assert(dataChannel != NULL);
void* user_data = dataChannel->userData;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)dataChannel->parent;
libwebrtc_data_channel* channel = (libwebrtc_data_channel*)dataChannel;
ILibWrapper_WebRTC_Connection_GetUserData(dataChannel->parent, (void**)&ctx, NULL, NULL);//&user_data);
if( ! ctx )
return;
// NOTE: When channels are auto-closed due to connection being destroyed, the channel_closed callback will occur AFTER the connection closed callback...
ctx->callback( ctx, conn, channel, LWRTC_CALLBACK_CHANNEL_CLOSED, user_data, dataChannel->channelName, strlen(dataChannel->channelName) );
}
// This is called when the remote ACK's our DataChannel creation request
void WebRTCOnDataChannelAck(ILibWrapper_WebRTC_DataChannel *dataChannel)
{
assert( dataChannel != NULL );
assert( dataChannel->parent != NULL );
void* user_data = dataChannel->userData;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)dataChannel->parent;
libwebrtc_data_channel* channel = (libwebrtc_data_channel*)dataChannel;
ILibWrapper_WebRTC_Connection_GetUserData(dataChannel->parent, (void**)&ctx, NULL, NULL);//&Nuser_data);
assert( ctx != NULL );
dataChannel->OnBinaryData = &WebRTCOnDataChannelData;
dataChannel->OnClosed = &WebRTCOnDataChannelClosed;
ctx->callback( ctx, conn, channel, LWRTC_CALLBACK_CHANNEL_CONNECTED, user_data, dataChannel->channelName, strlen(dataChannel->channelName) );
}
// If we launched this sample with "STUN", then this is called when a STUN candidate is found while setting an offer
void CandidateSink(ILibWrapper_WebRTC_Connection connection, struct sockaddr_in6* candidate)
{
printf(red"candidatesink!\n"rst);
SimpleRendezvousServer sender;
SimpleRendezvousServerToken token;
char *sdp = ILibWrapper_WebRTC_Connection_AddServerReflexiveCandidateToLocalSDP(connection, candidate);
ILibWrapper_WebRTC_Connection_GetUserData(connection, &sender, &token, NULL);
if(SimpleRendezvousServer_WebSocket_IsWebSocket(token)==0)
{
printf(red"ws is ws(token?)\n"rst);
SimpleRendezvousServer_Respond(sender, token, 1, sdp, strlen(sdp), ILibAsyncSocket_MemoryOwnership_CHAIN); // Send the SDP to the remote side
}
else
{
printf(red"not token?\n"rst);
SimpleRendezvousServer_WebSocket_Send(token, SimpleRendezvousServer_WebSocket_DataType_TEXT, sdp, strlen(sdp), ILibAsyncSocket_MemoryOwnership_CHAIN, SimpleRendezvousServer_FragmentFlag_Complete);
}
}
// This is called when the remote side creates a data channel
void WebRTCDataChannelAccept(ILibWrapper_WebRTC_Connection webRTCConnection, ILibWrapper_WebRTC_DataChannel *dataChannel) {
assert( webRTCConnection != NULL );
assert( dataChannel != NULL );
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)webRTCConnection;
libwebrtc_data_channel* channel = (libwebrtc_data_channel*)dataChannel;
ILibWrapper_WebRTC_Connection_GetUserData(webRTCConnection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
dataChannel->OnBinaryData = &WebRTCOnDataChannelData;
dataChannel->OnClosed = &WebRTCOnDataChannelClosed;
// use the parent user_data initially.
dataChannel->userData = user_data;
ctx->callback( ctx, conn, channel, LWRTC_CALLBACK_CHANNEL_ACCEPTED, user_data, dataChannel->channelName, strlen(dataChannel->channelName) );
}
int libwebrtc_create_offer( struct libwebrtc_connection* c ) {
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)c;
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
ILibWrapper_WebRTC_Connection_GetUserData(connection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
char* offer = ILibWrapper_WebRTC_Connection_GenerateOffer(connection, &WebRTCOnIceCandidate );
if( offer == NULL )
return 0;
// always send this offer, as the callback will only send additianal candidates
if( ctx->callback(ctx, c, NULL, LWRTC_CALLBACK_LOCAL_DESCRIPTION, user_data, offer, strlen(offer)) ) {
return 0;
}
return 1;
}
void PassiveCandidateSink(ILibWrapper_WebRTC_Connection connection, struct sockaddr_in6* candidate)
{
printf("While generating an offer?\n"rst);
SimpleRendezvousServer sender;
SimpleRendezvousServerToken token;
char *offer;
char *encodedOffer;
int encodedOfferLen;
char *h1;
ILibWrapper_WebRTC_Connection_GetUserData(connection, &sender, &token, (void**)&h1);
offer = ILibWrapper_WebRTC_Connection_AddServerReflexiveCandidateToLocalSDP(connection, candidate);
printf(green"ofer: \n %s\n"rst,offer);
encodedOfferLen = ILibBase64Encode((unsigned char*)offer, strlen(offer),(unsigned char**)&encodedOffer);
h1 = ILibString_Replace(passiveHtmlBody, passiveHtmlBodyLength, "/*{{{SDP}}}*/", 13, encodedOffer, encodedOfferLen);
free(offer);
free(encodedOffer);
SimpleRendezvousServer_Respond(sender, token, 1, h1, strlen(h1), ILibAsyncSocket_MemoryOwnership_CHAIN); // Send the SDP to the remote side
}
int libwebrtc_set_answer( struct libwebrtc_connection* conn, const char* sdp ) {
ILibWrapper_WebRTC_Connection connection = (ILibWrapper_WebRTC_Connection)conn;
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
ILibWrapper_WebRTC_Connection_GetUserData(connection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
// Microstack requires at least one candidate
std::string tmp;
if( strstr(sdp, "a=candidate") == NULL ) {
tmp = sdp;
tmp += "a=candidate:0 1 UDP 2128609534 0.0.0.0 0 typ host\n";
sdp = tmp.c_str();
}
char* offer = ILibWrapper_WebRTC_Connection_SetOffer(connection, (char*)sdp, strlen(sdp), NULL); // no CB as this is the answer
if( offer == NULL )
return 0;
return 1;
}
// This is called when a WebRTC Connection is established or disconnected
void WebRTCConnectionStatus(ILibWrapper_WebRTC_Connection webRTCConnection, int connected) {
assert(webRTCConnection != NULL);
void* user_data = NULL;
libwebrtc_context* ctx = NULL;
libwebrtc_connection* conn = (libwebrtc_connection*)webRTCConnection;
ILibWrapper_WebRTC_Connection_GetUserData(webRTCConnection, (void**)&ctx, NULL, &user_data);
assert( ctx != NULL );
if( connected )
ctx->callback( ctx, conn, NULL, LWRTC_CALLBACK_ESTABLISHED, user_data, NULL, 0);
else {
// TODO: We really should notify all the channels as closed as well, as we can't rely on microstack to do it as it occurs after this call.
// Clear the user data from the Connection, so additional callbacks wont be fired, as an DCs that are active get closed AFTER this call.
ILibWrapper_WebRTC_Connection_SetUserData(webRTCConnection, NULL, NULL, NULL);
ctx->callback( ctx, conn, NULL, LWRTC_CALLBACK_DISCONNECTED, user_data, NULL, 0);
// for all intensive purposes the connection object is destroyed at this point. We dont have a specific callback,
// but since this was called it WILL be destroyed when this call returns.
ctx->callback( ctx, conn, NULL, LWRTC_CALLBACK_DESTROY, user_data, NULL, 0);
}
}
__declspec(dllexport) void ILibWrapper_DLL_WebRTC_Connection_GetUserData(ILibWrapper_WebRTC_Connection connection, void **user1, void **user2, void **user3)
{
ILibWrapper_WebRTC_Connection_GetUserData(connection, user1, user2, user3);
}