feature(rpc): add connect timeout

include/os/osSocket.h

@@ -137,7 +137,8 @@ typedef struct TdEpoll *TdEpollPtr;
 int32_t taosSendto(TdSocketPtr pSocket, void *msg, int len, unsigned int flags, const struct sockaddr *to, int tolen);
 int32_t taosWriteSocket(TdSocketPtr pSocket, void *msg, int len);
 int32_t taosReadSocket(TdSocketPtr pSocket, void *msg, int len);
-int32_t taosReadFromSocket(TdSocketPtr pSocket, void *buf, int32_t len, int32_t flags, struct sockaddr *destAddr, int *addrLen);
+int32_t taosReadFromSocket(TdSocketPtr pSocket, void *buf, int32_t len, int32_t flags, struct sockaddr *destAddr,
+                           int *addrLen);
 int32_t taosCloseSocketNoCheck1(SocketFd fd);
 int32_t taosCloseSocket(TdSocketPtr *ppSocket);
 int32_t taosCloseSocketServer(TdSocketServerPtr *ppSocketServer);
@@ -156,6 +157,8 @@ int32_t taosNonblockwrite(TdSocketPtr pSocket, char *ptr, int32_t nbytes);
 int64_t taosCopyFds(TdSocketPtr pSrcSocket, TdSocketPtr pDestSocket, int64_t len);
 void    taosWinSocketInit();
 
+int taosCreateSocketWithTimeOutOpt(uint32_t conn_timeout_sec);
+
 TdSocketPtr       taosOpenUdpSocket(uint32_t localIp, uint16_t localPort);
 TdSocketPtr       taosOpenTcpClientSocket(uint32_t ip, uint16_t port, uint32_t localIp);
 TdSocketServerPtr taosOpenTcpServerSocket(uint32_t ip, uint16_t port);

source/libs/transport/inc/transComm.h

@@ -21,6 +21,7 @@ extern "C" {
 #include <uv.h>
 #include "lz4.h"
 #include "os.h"
+#include "osSocket.h"
 #include "rpcCache.h"
 #include "rpcHead.h"
 #include "rpcLog.h"
@@ -105,6 +106,7 @@ typedef void* queue[2];
 
 #define TRANS_RETRY_COUNT_LIMIT 10  // retry count limit
 #define TRANS_RETRY_INTERVAL    5   // ms retry interval
+#define TRANS_CONN_TIMEOUT      3   // connect timeout
 
 typedef struct {
   SRpcInfo* pRpc;     // associated SRpcInfo

source/libs/transport/src/transCli.c

@@ -103,6 +103,10 @@ static void      cliDestroyConn(SCliConn* pConn, bool clear /*clear tcp handle o
 static void      cliDestroy(uv_handle_t* handle);
 static void      cliSend(SCliConn* pConn);
 
+/*
+ * set TCP connection timeout per-socket level
+ */
+static int cliCreateSocket();
 // process data read from server, add decompress etc later
 static void cliHandleResp(SCliConn* conn);
 // handle except about conn
@@ -729,9 +733,15 @@ void cliHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd) {
     if (ret) {
       tError("%s cli conn %p failed to set conn option, errmsg %s", pTransInst->label, conn, uv_err_name(ret));
     }
+    int fd = taosCreateSocketWithTimeOutOpt(TRANS_CONN_TIMEOUT);
+    if (fd == -1) {
+      tTrace("%s cli conn %p failed to create socket", pTransInst->label, conn);
+      cliHandleExcept(conn);
+      return;
+    }
+    uv_tcp_open((uv_tcp_t*)conn->stream, fd);
 
     struct sockaddr_in addr;
-
     addr.sin_family = AF_INET;
     addr.sin_addr.s_addr = taosGetIpv4FromFqdn(conn->ip);
     addr.sin_port = (uint16_t)htons((uint16_t)conn->port);

source/os/src/osSocket.c

@@ -44,6 +44,10 @@
 #endif
 #endif
 
+#ifndef INVALID_SOCKET
+#define INVALID_SOCKET -1
+#endif
+
 typedef struct TdSocketServer {
 #if SOCKET_WITH_LOCK
   TdThreadRwlock rwlock;
@@ -94,7 +98,8 @@ int32_t taosReadSocket(TdSocketPtr pSocket, void *buf, int len) {
 #endif
 }
 
-int32_t taosReadFromSocket(TdSocketPtr pSocket, void *buf, int32_t len, int32_t flags, struct sockaddr *destAddr, int *addrLen) {
+int32_t taosReadFromSocket(TdSocketPtr pSocket, void *buf, int32_t len, int32_t flags, struct sockaddr *destAddr,
+                           int *addrLen) {
   if (pSocket == NULL || pSocket->fd < 0) {
     return -1;
   }
@@ -689,8 +694,7 @@ TdSocketServerPtr taosOpenTcpServerSocket(uint32_t ip, uint16_t port) {
   return (TdSocketServerPtr)pSocket;
 }
 
-TdSocketPtr taosAcceptTcpConnectSocket(TdSocketServerPtr pServerSocket, struct sockaddr *destAddr,
-                                       int *addrLen) {
+TdSocketPtr taosAcceptTcpConnectSocket(TdSocketServerPtr pServerSocket, struct sockaddr *destAddr, int *addrLen) {
   if (pServerSocket == NULL || pServerSocket->fd < 0) {
     return NULL;
   }
@@ -887,7 +891,6 @@ int32_t taosGetSocketName(TdSocketPtr pSocket, struct sockaddr *destAddr, int *a
   return getsockname(pSocket->fd, destAddr, addrLen);
 }
 
-
 TdEpollPtr taosCreateEpoll(int32_t size) {
   EpollFd fd = -1;
 #ifdef WINDOWS
@@ -939,3 +942,28 @@ int32_t taosCloseEpoll(TdEpollPtr *ppEpoll) {
   taosMemoryFree(*ppEpoll);
   return code;
 }
+/*
+ * Set TCP connection timeout per-socket level.
+ * ref [https://github.com/libuv/help/issues/54]
+ */
+int taosCreateSocketWithTimeOutOpt(uint32_t conn_timeout_sec) {
+#if defined(WINDOWS)
+  SOCKET fd;
+#else
+  int      fd;
+#endif
+  if ((fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {
+    return -1;
+  }
+#if defined(WINDOWS)
+  if (0 != setsockopt(fd, IPPROTO_TCP, TCP_MAXRT, (char *)&conn_timeout_sec, sizeof(conn_timeout_sec))) {
+    return -1;
+  }
+#else  // Linux like systems
+  uint32_t conn_timeout_ms = conn_timeout_sec * 1000;
+  if (0 != setsockopt(fd, IPPROTO_TCP, TCP_USER_TIMEOUT, (char *)&conn_timeout_ms, sizeof(conn_timeout_ms))) {
+    return -1;
+  }
+#endif
+  return (int)fd;
+}