tune the TCP socket code

src/rpc/src/rpcTcp.c

@@ -468,7 +468,7 @@ static void taosFreeFdObj(SFdObj *pFdObj) {
 
   pFdObj->signature = NULL;
   epoll_ctl(pThreadObj->pollFd, EPOLL_CTL_DEL, pFdObj->fd, NULL);
-  taosCloseTcpSocket(pFdObj->fd);
+  taosCloseSocket(pFdObj->fd);
 
   pThreadObj->numOfFds--;
 

src/util/inc/tsocket.h

@@ -31,7 +31,6 @@ int  taosOpenUdpSocket(uint32_t localIp, uint16_t localPort);
 int  taosOpenTcpClientSocket(uint32_t ip, uint16_t port, uint32_t localIp);
 int  taosOpenTcpServerSocket(uint32_t ip, uint16_t port);
 int  taosKeepTcpAlive(int sockFd);
-void taosCloseTcpSocket(int sockFd);
 
 int      taosGetFqdn(char *);
 uint32_t taosGetIpFromFqdn(const char *);

src/util/src/tsocket.c

@@ -305,18 +305,9 @@ int taosOpenTcpClientSocket(uint32_t destIp, uint16_t destPort, uint32_t clientI
     sockFd = -1;
   }
 
-  return sockFd;
-}
-
-void taosCloseTcpSocket(int sockFd) {
-  struct linger linger;
-  linger.l_onoff = 1;
-  linger.l_linger = 0;
-  if (taosSetSockOpt(sockFd, SOL_SOCKET, SO_LINGER, (void *)&linger, sizeof(linger)) < 0) {
-    uError("setsockopt SO_LINGER failed: %d (%s)", errno, strerror(errno));
-  }
+  taosKeepTcpAlive(sockFd);
 
-  taosCloseSocket(sockFd);
+  return sockFd;
 }
 
 int taosKeepTcpAlive(int sockFd) {
@@ -355,6 +346,15 @@ int taosKeepTcpAlive(int sockFd) {
     return -1;
   }
 
+  struct linger linger = {0};
+  linger.l_onoff = 1;
+  //linger.l_linger = 0;
+  if (taosSetSockOpt(sockFd, SOL_SOCKET, SO_LINGER, (void *)&linger, sizeof(linger)) < 0) {
+    uError("setsockopt SO_LINGER failed: %d (%s)", errno, strerror(errno));
+    close(sockFd);
+    return -1;
+  }
+
   return 0;
 }