webrtc单端口模式支持线程安全，支持链接迁移

ZLToolKit @ b8e06622

-Subproject commit a827f0bdcb4221c19ab1a243ebd1f01fa7dc50f2
+Subproject commit b8e066222b757a2c11b5e44c49ef6982acb95fe2

server/main.cpp

@@ -309,6 +309,17 @@ int start_main(int argc,char *argv[]) {
 #if defined(ENABLE_WEBRTC)
         //webrtc udp服务器
         UdpServer::Ptr rtcSrv = std::make_shared<UdpServer>();
+        rtcSrv->setOnCreateSocket([](const EventPoller::Ptr &poller, const Buffer::Ptr &buf, struct sockaddr *, int) {
+            if (!buf) {
+                return Socket::createSocket(poller, false);
+            }
+            auto new_poller = WebRtcSession::getPoller(buf);
+            if (!new_poller) {
+                //该数据对应的webrtc对象未找到，丢弃之
+                return Socket::Ptr();
+            }
+            return Socket::createSocket(new_poller, false);
+        });
         uint16_t rtcPort = mINI::Instance()[RTC::kPort];
 #endif//defined(ENABLE_WEBRTC)
 

webrtc/WebRtcSession.cpp

@@ -21,26 +21,54 @@ WebRtcSession::~WebRtcSession() {
     InfoP(this);
 }
 
-void WebRtcSession::onRecv(const Buffer::Ptr &buffer) {
+static string getUserName(const Buffer::Ptr &buffer) {
     auto buf = buffer->data();
     auto len = buffer->size();
-
-    if (!_transport && RTC::StunPacket::IsStun((const uint8_t *) buf, len)) {
+    if (!RTC::StunPacket::IsStun((const uint8_t *) buf, len)) {
+        return "";
+    }
     std::unique_ptr<RTC::StunPacket> packet(RTC::StunPacket::Parse((const uint8_t *) buf, len));
     if (!packet) {
-            WarnL << "parse stun error";
-            return;
+        return "";
     }
-        if (packet->GetClass() == RTC::StunPacket::Class::REQUEST &&
-            packet->GetMethod() == RTC::StunPacket::Method::BINDING) {
-            //收到binding request请求
-            _transport = createTransport(packet->GetUsername());
+    if (packet->GetClass() != RTC::StunPacket::Class::REQUEST ||
+        packet->GetMethod() != RTC::StunPacket::Method::BINDING) {
+        return "";
     }
+    //收到binding request请求
+    auto vec = split(packet->GetUsername(), ":");
+    return vec[0];
+}
+
+EventPoller::Ptr WebRtcSession::getPoller(const Buffer::Ptr &buffer) {
+    auto user_name = getUserName(buffer);
+    if (user_name.empty()) {
+        return nullptr;
     }
+    auto ret = WebRtcTransportImp::getTransport(user_name);
+    return ret ? ret->getPoller() : nullptr;
+}
 
-    if (_transport) {
-        _transport->inputSockData(buf, len, &_peer_addr);
+void WebRtcSession::onRecv(const Buffer::Ptr &buffer) {
+    auto buf = buffer->data();
+    auto len = buffer->size();
+
+    if (!_transport) {
+        auto user_name = getUserName(buffer);
+        if (user_name.empty()) {
+            //逻辑分支不太可能走到这里
+            WarnL << user_name;
+            return;
+        }
+        _transport = WebRtcTransportImp::getTransport(user_name);
+        if (!_transport) {
+            //逻辑分支不太可能走到这里
+            WarnL << user_name;
+            return;
         }
+        _transport->setSession(this);
+    }
+    _transport->inputSockData(buf, len, &_peer_addr);
 }
 
 void WebRtcSession::onError(const SockException &err) {
@@ -53,13 +81,3 @@ void WebRtcSession::onError(const SockException &err) {
 void WebRtcSession::onManager() {
 
 }
-
-std::shared_ptr<WebRtcTransport> WebRtcSession::createTransport(const string &user_name) {
-    if (user_name.empty()) {
-        return nullptr;
-    }
-    auto vec = split(user_name, ":");
-    auto ret = WebRtcTransportImp::getTransport(vec[0]);
-    ret->setSession(this);
-    return ret;
-}

webrtc/WebRtcSession.h

@@ -20,6 +20,8 @@ using namespace toolkit;
 
 class WebRtcSession : public UdpSession {
 public:
+    static EventPoller::Ptr getPoller(const Buffer::Ptr &);
+
     WebRtcSession(const Socket::Ptr &sock);
     ~WebRtcSession() override;
 
@@ -28,11 +30,8 @@ public:
     void onManager() override;
 
 private:
-    std::shared_ptr<WebRtcTransport> createTransport(const string &user_name);
-
-private:
     struct sockaddr _peer_addr;
-    std::shared_ptr<WebRtcTransport> _transport;
+    std::shared_ptr<WebRtcTransportImp> _transport;
 };