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You can delete next line and everything above before submitting (it is a comment). --> <!-- Explain what you did, what you expected to happen, and what actually happened. --> I incremented sess-version w/ value `2147483648` via `$sdp(sess_version) = -1` as well as `$sdp(sess_version) = 2147483648`. sess-version in SDP should be 2147483649 but is `-1941279658`. ### Troubleshooting [RFC4566 5.2. Origin ("o=")](https://datatracker.ietf.org/doc/html/rfc4566#section-5.2) ``` <sess-version> is a version number for this session description. Its usage is up to the creating tool, so long as <sess-version> is increased when a modification is made to the session data. Again, it is RECOMMENDED that an NTP format timestamp is used. ``` [Wikipedia NTP Timestamps](https://en.wikipedia.org/wiki/Network_Time_Protocol#Timestamps) ``` The 64-bit binary fixed-point timestamps used by NTP consist of a 32-bit part for seconds and a 32-bit part for fractional second, giving a time scale that rolls over every 232 seconds (136 years) and a theoretical resolution of 2−32 seconds (233 picoseconds). NTP uses an epoch of January 1, 1900. Therefore, the first rollover occurs on February 7, 2036.[28][29] ``` #### Reproduction Receive SDP w/ sess-version greater equal 2^31 (2147483648) and increase version via `$sdp(sess-version) = -1` or setting a value greater than 2^31. <!-- If the issue can be reproduced, describe how it can be done. --> #### 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). --> ``` May 02 06:43:20.578496 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} <core> [core/parser/sdp/sdp_helpr_funcs.c:622]: extract_sess_version(): oline(46): >o=user1 53655765 2147483648 IN IP4 127.0.0.1 < May 02 06:43:20.578501 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} <core> [core/parser/sdp/sdp_helpr_funcs.c:651]: extract_sess_version(): end 10: >2147483648< May 02 06:43:20.578508 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} <core> [core/parser/sdp/sdp_helpr_funcs.c:506]: extract_mediaip(): located IP address [127.0.0.1] in `o=' field May 02 06:43:20.578512 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} <core> [core/parser/sdp/sdp_helpr_funcs.c:506]: extract_mediaip(): located IP address [127.0.0.1] in `c=' field May 02 06:43:20.578532 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1918]: sdp_get_sess_version(): sdp_session_num 0 sess-version: 2147483648 May 02 06:43:20.578536 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1923]: sdp_get_sess_version(): sdp_session_num 1 May 02 06:43:20.578576 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1918]: sdp_get_sess_version(): sdp_session_num 0 sess-version: 2147483648 May 02 06:43:20.578581 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1923]: sdp_get_sess_version(): sdp_session_num 1 May 02 06:43:20.578695 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:2111]: pv_set_sdp(): res->flags: 24 May 02 06:43:20.578702 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:2112]: pv_set_sdp(): PV_TYPE_INT: 16 May 02 06:43:20.578705 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:2113]: pv_set_sdp(): PV_VAL_INT: 8 May 02 06:43:20.578708 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:2116]: pv_set_sdp(): param.pvn.u.isname.name.n = 1 May 02 06:43:20.578710 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:2125]: pv_set_sdp(): do $sdp(sess_version) = -1941279658 May 02 06:43:20.578713 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1918]: sdp_get_sess_version(): sdp_session_num 0 sess-version: 2147483648 May 02 06:43:20.578716 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1923]: sdp_get_sess_version(): sdp_session_num 1 May 02 06:43:20.578750 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1971]: sdp_set_sess_version(): old_sess_version_num: -2147483648 autoincrement: 0 May 02 06:43:20.578756 debian11 /usr/sbin/kamailio[121163]: DEBUG: {1 2 INVITE 1-121317(a)127.0.0.1} sdpops [sdpops_mod.c:1972]: sdp_set_sess_version(): *new_sess_version_num: -1941279658 autoincrement: 0 ``` ### Possible Solutions <!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. --> ### Additional Information * **Kamailio Version** - output of `kamailio -v` ``` version: kamailio 5.5.4 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, 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_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 10.2.1 ``` * **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 `lsb_release -a` and `uname -a`) --> ``` Distributor ID: Debian Description: Debian GNU/Linux 11 (bullseye) Release: 11 Codename: bullseye Linux debian11 5.10.0-13-amd64 #1 SMP Debian 5.10.106-1 (2022-03-17) x86_64 GNU/Linux ``` -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3099 You are receiving this because you are subscribed to this thread. 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