[sr-dev] [kamailio/kamailio] Write Buffer too small (#2240)

<!-- Kamailio Project uses GitHub Issues only for bugs in the code or feature requests. Please use this template only for bug reports. If you have questions about using Kamailio or related to its configuration file, ask on sr-users mailing list: * http://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users If you have questions about developing extensions to Kamailio or its existing C code, ask on sr-dev mailing list: * http://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-dev Please try to fill this template as much as possible for any issue. It helps the developers to troubleshoot the issue. If there is no content to be filled in a section, the entire section can be removed. You can delete the comments from the template sections when filling. You can delete next line and everything above before submitting (it is a comment). --> ### Description <!-- Explain what you did, what you expected to happen, and what actually happened. --> We're trying to connect the same subscriber with Kamailio for load testing. Sometimes it registers successfully but sometimes it throws the following error. ### Troubleshooting #### Reproduction <!-- If the issue can be reproduced, describe how it can be done. --> I don't exactly know how to reproduce as some the clients pass and some fail. #### Debugging Data <!-- If you got a core dump, use gdb to extract troubleshooting data - full backtrace, local variables and the list of the code at the issue location. gdb /path/to/kamailio /path/to/corefile bt full info locals list If you are familiar with gdb, feel free to attach more of what you consider to be relevant. --> ``` (paste your debugging data here) ``` #### Log Messages <!-- Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> BUG: tls [tls_server.c:849]: tls_encode_f(): write buffer too small (65536/65536 bytes) ERROR: websocket [ws_frame.c:300]: encode_and_send_ws_frame(): sending WebSocket frame ERROR: websocket [ws_frame.c:800]: ws_frame_transmit(): sending message NOTICE: <script>: WebSocket connection from a.b.c.d:1234 has closed ERROR: registrar [reply.c:745]: reg_send_reply(): failed to send 200 OK ERROR: <core> [core/tcp_main.c:3502]: handle_ser_child(): received CON_ERROR for 0x7f9472eec990 (id 100), refcnt 4, flags 0x4018 NOTICE: <script>: Error in saving location data WARNING: sl [../../core/forward.h:173]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found ERROR: sl [sl_funcs.c:362]: sl_reply_error(): stateless error reply used: I'm terribly sorry, server error occurred (1/SL) WARNING: <core> [core/tcp_read.c:1716]: handle_io(): F_TCPCONN connection marked as bad: 0x7f9472eec990 id 100 refcnt 1 #### SIP Traffic <!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> ### Possible Solutions <!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. --> Need to increase the default tls write buffer size from 65536. I think it is set as "#define TLS_WR_MBUF_SZ 65536" ### Additional Information * **Kamailio Version** - output of `kamailio -v` version: kamailio 5.0.8 (x86_64/linux) c35e69 flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: c35e69 compiled on 05:04:45 Nov 25 2019 with gcc 4.8.5 * **Operating System**: <!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `uname -a`) --> Linux 3.10.0-957.21.3.el7.x86_64 #1 SMP Tue Jun 18 16:35:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux CentOS Linux release 7.7.1908 (Core) -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2240