diff --git a/trunk/src/app/srs_app_listener.cpp b/trunk/src/app/srs_app_listener.cpp
index 260edfbb4..4852b2ea9 100755
--- a/trunk/src/app/srs_app_listener.cpp
+++ b/trunk/src/app/srs_app_listener.cpp
@@ -124,7 +124,7 @@ srs_error_t SrsUdpListener::listen()
     
     addrinfo* r  = NULL;
     SrsAutoFree(addrinfo, r);
-    if(getaddrinfo(ip.c_str(), sport, (const addrinfo*)&hints, &r) != 0) {
+    if(getaddrinfo(ip.c_str(), sport, (const addrinfo*)&hints, &r)) {
         return srs_error_new(ERROR_SYSTEM_IP_INVALID, "get address info");
     }
     
@@ -220,7 +220,7 @@ srs_error_t SrsTcpListener::listen()
     
     addrinfo* r = NULL;
     SrsAutoFree(addrinfo, r);
-    if(getaddrinfo(ip.c_str(), sport, (const addrinfo*)&hints, &r) != 0) {
+    if(getaddrinfo(ip.c_str(), sport, (const addrinfo*)&hints, &r)) {
         return srs_error_new(ERROR_SYSTEM_IP_INVALID, "get address info");
     }
     
diff --git a/trunk/src/app/srs_app_mpegts_udp.cpp b/trunk/src/app/srs_app_mpegts_udp.cpp
index 4c131b75b..cf37c82dd 100644
--- a/trunk/src/app/srs_app_mpegts_udp.cpp
+++ b/trunk/src/app/srs_app_mpegts_udp.cpp
@@ -163,7 +163,7 @@ srs_error_t SrsMpegtsOverUdp::on_udp_packet(const sockaddr* from, const int from
     if(getnameinfo(from, fromlen, 
                    (char*)&address_string, sizeof(address_string),
                    (char*)&port_string, sizeof(port_string),
-                   NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
+                   NI_NUMERICHOST|NI_NUMERICSERV)) {
         return srs_error_new(ERROR_SYSTEM_IP_INVALID, "bad address");
     }
     std::string peer_ip = std::string(address_string);
diff --git a/trunk/src/app/srs_app_utility.cpp b/trunk/src/app/srs_app_utility.cpp
index c36e974d0..94db336a7 100644
--- a/trunk/src/app/srs_app_utility.cpp
+++ b/trunk/src/app/srs_app_utility.cpp
@@ -1117,7 +1117,7 @@ string srs_get_local_ip(int fd)
     char* h = (char*)saddr;
     socklen_t nbh = (socklen_t)sizeof(saddr);
     const int r0 = getnameinfo((const sockaddr*)&addr, addrlen, h, nbh,NULL, 0, NI_NUMERICHOST);
-    if(r0 != 0) {
+    if(r0) {
         return "";
     }
 
@@ -1159,7 +1159,7 @@ string srs_get_peer_ip(int fd)
     char* h = (char*)saddr;
     socklen_t nbh = (socklen_t)sizeof(saddr);
     const int r0 = getnameinfo((const sockaddr*)&addr, addrlen, h, nbh, NULL, 0, NI_NUMERICHOST);
-    if(r0 != 0) {
+    if(r0) {
         return "";
     }
 
diff --git a/trunk/src/kernel/srs_kernel_utility.cpp b/trunk/src/kernel/srs_kernel_utility.cpp
index 94f6375d3..1e4142ee5 100644
--- a/trunk/src/kernel/srs_kernel_utility.cpp
+++ b/trunk/src/kernel/srs_kernel_utility.cpp
@@ -164,7 +164,7 @@ string srs_dns_resolve(string host, int& family)
     addrinfo* r = NULL;
     SrsAutoFree(addrinfo, r);
     
-    if(getaddrinfo(host.c_str(), NULL, NULL, &r) != 0) {
+    if(getaddrinfo(host.c_str(), NULL, NULL, &r)) {
         return "";
     }
     
@@ -173,7 +173,7 @@ string srs_dns_resolve(string host, int& family)
     socklen_t nbh = sizeof(saddr);
     const int r0 = getnameinfo(r->ai_addr, r->ai_addrlen, h, nbh, NULL, 0, NI_NUMERICHOST);
 
-    if(r0) {
+    if(!r0) {
        family = r->ai_family;
        return string(saddr);
     }
diff --git a/trunk/src/libs/srs_lib_simple_socket.cpp b/trunk/src/libs/srs_lib_simple_socket.cpp
index b9e5c3e56..65c3e3a76 100644
--- a/trunk/src/libs/srs_lib_simple_socket.cpp
+++ b/trunk/src/libs/srs_lib_simple_socket.cpp
@@ -23,6 +23,8 @@
 
 #include <srs_lib_simple_socket.hpp>
 
+#include <netinet/tcp.h>
+
 #include <srs_kernel_error.hpp>
 
 // for srs-librtmp, @see https://github.com/ossrs/srs/issues/213
@@ -119,6 +121,10 @@ int srs_hijack_io_create_socket(srs_hijack_io_t ctx, srs_rtmp_t owner)
     if (!SOCKET_VALID(skt->fd)) {
         return ERROR_SOCKET_CREATE;
     }
+    
+    // No TCP cache.
+    int v = 1;
+    setsockopt(skt->fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
 
     return ERROR_SUCCESS;
 }
@@ -133,14 +139,15 @@ int srs_hijack_io_connect(srs_hijack_io_t ctx, const char* server_ip, int port)
     memset(&hints, 0, sizeof(hints));
     hints.ai_family   = skt->family;
     hints.ai_socktype = SOCK_STREAM;
-    hints.ai_flags    = AI_NUMERICHOST;
     
     addrinfo* r  = NULL;
     SrsAutoFree(addrinfo, r);
-    if(getaddrinfo(server_ip, sport, (const addrinfo*)&hints, &r) == 0) {
-        if(::connect(skt->fd, r->ai_addr, r->ai_addrlen) < 0){
-            return ERROR_SOCKET_CONNECT;
-        }
+    if(getaddrinfo(server_ip, sport, (const addrinfo*)&hints, &r)) {
+        return ERROR_SOCKET_CONNECT;
+    }
+    
+    if(::connect(skt->fd, r->ai_addr, r->ai_addrlen) < 0){
+        return ERROR_SOCKET_CONNECT;
     }
     
     return ERROR_SUCCESS;
diff --git a/trunk/src/service/srs_service_st.cpp b/trunk/src/service/srs_service_st.cpp
index b0de11a01..9a5eea12e 100644
--- a/trunk/src/service/srs_service_st.cpp
+++ b/trunk/src/service/srs_service_st.cpp
@@ -124,7 +124,7 @@ srs_error_t srs_socket_connect(string server, int port, int64_t tm, srs_netfd_t*
     
     addrinfo* r  = NULL;
     SrsAutoFree(addrinfo, r);
-    if(getaddrinfo(server.c_str(), sport, (const addrinfo*)&hints, &r) != 0) {
+    if(getaddrinfo(server.c_str(), sport, (const addrinfo*)&hints, &r)) {
         return srs_error_new(ERROR_SYSTEM_IP_INVALID, "get address info");
     }
     
diff --git a/trunk/src/service/srs_service_utility.cpp b/trunk/src/service/srs_service_utility.cpp
index 63694483e..e4e62746e 100644
--- a/trunk/src/service/srs_service_utility.cpp
+++ b/trunk/src/service/srs_service_utility.cpp
@@ -107,7 +107,7 @@ void discover_network_iface(ifaddrs* cur, vector<string>& ips, stringstream& ss0
     char* h = (char*)saddr;
     socklen_t nbh = (socklen_t)sizeof(saddr);
     const int r0 = getnameinfo(cur->ifa_addr, sizeof(sockaddr_storage), h, nbh, NULL, 0, NI_NUMERICHOST);
-    if(r0 != 0) {
+    if(r0) {
         srs_warn("convert local ip failed: %s", gai_strerror(r0));
         return;
     }