Description

Hello,
Kamailio -master version couldnt relay tcp request to other sides. it gives EAGAIN error. When i test scenario on kamailio-5.2 version , it can relay.

Troubleshooting

Reproduction

route[TCPTEST]{
remove_hf("Route");
#loose_route();
if (!is_method("INVITE")) return;

$du="sip: mykamailio1.test:5060;transport=tcp";

if(!t_newtran()){
 xlog("L_WARN"," Couldnt create new transaction \r\n");
 sl_send_reply("503", "Service not available");
 exit;
}

if(!t_relay()){
 send_reply("503", "Service not available");
 exit;
}
exit;
}

Debugging Data

Log Messages

 7(15781) DEBUG: <core> [core/tcp_main.c:1229]: tcpconn_new(): on port 5060, type 2
 7(15781) DEBUG: <core> [core/tcp_main.c:1539]: tcpconn_add(): hashes: 507:2382:0, 2
 7(15781) DEBUG: <core> [core/tcp_main.c:2873]: tcpconn_1st_send(): pending write on new connection 0x7fd15b5e7c98 (-1/1483 bytes written) (err: 11 - Resource temporarily unavailable)
 7(15781) ERROR: <core> [core/tcp_main.c:2891]: tcpconn_1st_send(): [FD61:C23C:B3B6:0:0:0:0:5]:5060: EAGAIN and write queue full or failed for 0x7fd15b5e7c98
 7(15781) DEBUG: <core> [core/tcp_main.c:3153]: tcpconn_chld_put(): destroying connection 0x7fd15b5e7c98 (2, -1) flags 0060
 
 7(15781) ERROR: tm [../../core/forward.h:251]: msg_send_buffer(): tcp_send failed

SIP Traffic

UAC: IPv6: TCP ---> Kamailio (5.2) :IPv6 :TCP --->  Client or Server IPv6:TCP 

Possible Solutions

Additional Information

Kamailio master from git

• Operating System:

NAME="CentOS Linux"
VERSION="7 (Core)"
3.10.0-957.1.3.el7.x86_64

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