libt2n: (gerd) add connect timeout

[libt2n] / src / socket_client.cpp

diff --git a/src/socket_client.cpp b/src/socket_client.cpp
index 067b033..100ca54 100644 (file)
--- a/src/socket_client.cpp
+++ b/src/socket_client.cpp
@@ -43,74 +43,137 @@ using namespace std;
 namespace libt2n
 {
 
-socket_client_connection::socket_client_connection(const std::string& _server, int _port, int _max_retries)
+socket_client_connection::socket_client_connection(int _port, const std::string& _server, 
+            long long _connect_timeout_usec, int _max_retries)
     : client_connection(), socket_handler(0,tcp_s)
 {
     max_retries=_max_retries;
+    connect_timeout_usec=_connect_timeout_usec;
 
     server=_server;
     port=_port;
 
-    connect();
+    tcp_connect(max_retries);
 }
 
-socket_client_connection::socket_client_connection(const std::string& _path, int _max_retries)
+socket_client_connection::socket_client_connection(const std::string& _path,
+            long long _connect_timeout_usec, int _max_retries)
     : client_connection(), socket_handler(0,unix_s)
 {
     max_retries=_max_retries;
+    connect_timeout_usec=_connect_timeout_usec;
 
     path=_path;
 
-    connect();
+    unix_connect(max_retries);
 }
 
-void socket_client_connection::connect()
+void socket_client_connection::tcp_connect(int max_retries)
 {
-    if (get_type() == unix_s)
+    struct sockaddr_in sock_addr;
+
+    sock_addr.sin_family = AF_INET;
+    sock_addr.sin_port = htons(port);
+
+    // find the target ip
+    if (inet_aton(server.c_str(),&sock_addr.sin_addr)==0)
     {
-        struct sockaddr_un unix_addr;
+        struct hostent *server_hent;
+        server_hent=gethostbyname(server.c_str());
+        if (server_hent == NULL)
+            throw t2n_connect_error(string("can't find server ")+server);
 
-        unix_addr.sun_family = AF_UNIX;
-        strcpy (unix_addr.sun_path, path.c_str());
+        memcpy(&sock_addr.sin_addr,server_hent->h_addr_list[0],sizeof(sock_addr.sin_addr));
+    }
 
-        sock = socket(PF_UNIX, SOCK_STREAM, 0);
-        if (!sock)
-            throw t2n_connect_error(string("socket() error: ")+strerror(errno));
+    sock = socket(PF_INET, SOCK_STREAM, 0);
+    if (!sock)
+        throw t2n_connect_error(string("socket() error: ")+strerror(errno));
 
-        if (::connect(sock,(struct sockaddr *) &unix_addr, sizeof(unix_addr)))
-            throw t2n_connect_error(string("connect() error: ")+strerror(errno));
+    try
+    {
+        connect_with_timeout((struct sockaddr *) &sock_addr,sizeof(sock_addr));
     }
-    else if (get_type() == tcp_s)
+    catch (t2n_connect_error &e)
     {
-        struct sockaddr_in sock_addr;
+        // recurse if retries left
+        if (max_retries > 0)
+            tcp_connect(max_retries-1);
+    }
 
-        sock_addr.sin_family = AF_INET;
-        sock_addr.sin_port = htons(port);
+    do_callbacks(new_connection);
+}
 
-        // find the target ip
-        if (inet_aton(server.c_str(),&sock_addr.sin_addr)==0)
-        {
-            struct hostent *server_hent;
-            server_hent=gethostbyname(server.c_str());
-            if (server_hent == NULL)
-                throw t2n_connect_error(string("can't find server ")+server);
+void socket_client_connection::unix_connect(int max_retries)
+{
+    struct sockaddr_un unix_addr;
 
-            memcpy(&sock_addr.sin_addr,server_hent->h_addr_list[0],sizeof(sock_addr.sin_addr));
-        }
+    unix_addr.sun_family = AF_UNIX;
+    strcpy (unix_addr.sun_path, path.c_str());
 
-        sock = socket(PF_INET, SOCK_STREAM, 0);
-        if (!sock)
-            throw t2n_connect_error(string("socket() error: ")+strerror(errno));
+    sock = socket(PF_UNIX, SOCK_STREAM, 0);
+    if (!sock)
+        throw t2n_connect_error(string("socket() error: ")+strerror(errno));
 
-        if (::connect(sock,(struct sockaddr *) &sock_addr, sizeof(sock_addr)))
-            throw t2n_connect_error(string("connect() error: ")+strerror(errno));
+    try
+    {
+        connect_with_timeout((struct sockaddr *) &unix_addr, sizeof(unix_addr));
+    }
+    catch (t2n_connect_error &e)
+    {
+        // recurse if retries left
+        if (max_retries > 0)
+            tcp_connect(max_retries-1);
     }
-    else
-        throw t2n_connect_error(string("invalid connection type"));
 
+    do_callbacks(new_connection);
+}
+
+void socket_client_connection::connect_with_timeout(struct sockaddr *sock_addr,unsigned int sockaddr_size)
+{
     set_socket_options(sock);
 
-    do_callbacks(new_connection);
+    int ret=::connect(sock,sock_addr, sockaddr_size);
+
+    if (ret < 0)
+    {
+        if (errno==EINPROGRESS)
+        {
+            /* set timeout */
+            struct timeval tval;
+            struct timeval *timeout_ptr;
+
+            if (connect_timeout_usec == -1)
+                timeout_ptr = NULL;
+            else
+            {
+                timeout_ptr = &tval;
+
+                // convert timeout from long long usec to int sec + int usec
+                tval.tv_sec = connect_timeout_usec / 1000000;
+                tval.tv_usec = connect_timeout_usec % 1000000;
+            }
+
+            fd_set connect_socket_set;
+            FD_ZERO(&connect_socket_set);
+            FD_SET(sock,&connect_socket_set);
+
+            int ret;
+            while ((ret=select(FD_SETSIZE, NULL, &connect_socket_set, NULL, timeout_ptr)) &&
+                    ret < 0 && errno==EINTR);
+
+            if (ret < 0)
+                throw t2n_connect_error(string("connect() error (select): ")+strerror(errno));
+
+            socklen_t sopt=sizeof(int);
+            int valopt;
+            ret=getsockopt(sock, SOL_SOCKET, SO_ERROR, (void*)(&valopt), &sopt);
+            if (ret < 0 || valopt)
+                throw t2n_connect_error(string("connect() error (getsockopt): ")+strerror(errno));
+        }
+        else
+            throw t2n_connect_error(string("connect() error: ")+strerror(errno));
+    }
 }
 
 void socket_client_connection::close()