伺服器建立一個socket作為server端的套接字

1.RTSPServer::setUpOurSocket

1.1.呼叫 GroupsockHelper 的 setupStreamSocket建立一個socket連線，並繫結，

ourSocket = setupStreamSocket(env, ourPort);

1.2. 設定傳送緩衝區為50K

if (!increaseSendBufferTo(env, ourSocket, 50*1024))

1.3. 監聽埠 其最大連線數為LISTEN_BACKLOG_SIZE 20

    if (listen(ourSocket, LISTEN_BACKLOG_SIZE) < 0)

1.4. 返回建立的socket

return ourSocket;

呼叫建構函式
2.new RTSPServer

      2.1. 記錄成員資訊 埠號 記錄socket

    fRTSPServerPort(ourPort), fRTSPServerSocket(ourSocket), fHTTPServerSocket(-1), fHTTPServerPort(0),
    fServerMediaSessions(HashTable::create(STRING_HASH_KEYS)),
    fClientConnections(HashTable::create(ONE_WORD_HASH_KEYS)),
    fClientConnectionsForHTTPTunneling(NULL), // will get created if needed
    fClientSessions(HashTable::create(STRING_HASH_KEYS)),
    fPendingRegisterRequests(HashTable::create(ONE_WORD_HASH_KEYS)), fRegisterRequestCounter(0),
    fAuthDB(authDatabase), fReclamationTestSeconds(reclamationTestSeconds),
    fAllowStreamingRTPOverTCP(True) {
  ignoreSigPipeOnSocket(ourSocket); // so that clients on the same host that are killed don't also kill us
 

2.2  註冊一個成員函函式用於接收客戶端的連線

void RTSPServer::incomingConnectionHandlerRTSP(void* instance, int /*mask*/) {
  RTSPServer* server = (RTSPServer*)instance;
  server->incomingConnectionHandlerRTSP1();
}
void RTSPServer::incomingConnectionHandlerRTSP1() {
  incomingConnectionHandler(fRTSPServerSocket);
}
void RTSPServer::incomingConnectionHandler(int serverSocket) {
 

2.2.1accept返回客戶端的socket描述符clientSocket int clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &clientAddrLen);

2.2.2設定和客戶端的連線模式為非阻塞的模式

makeSocketNonBlocking

2.2.3.設定客戶端socket描述符的傳送快取為50*1024

increaseSendBufferTo(envir(), clientSocket, 50*1024);

2.2.4.建立一個處理連線函式

createNewClientConnection
RTSPClientConnection

2.2.4.1 將該連結新增進入fClientConnections的連線表中

fOurServer.fClientConnections->Add((char const*)this, this);

2.2.4.2 註冊一個處理事件通訊的函式（自己的程式可以用執行緒替代）

setBackgroundHandling（&incomingRequestHandler（））

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