For testing this was validated on master with the setup below.

environment

root@kam:~# uname -a
Linux kam 6.1.0-9-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.27-1 (2023-05-08) x86_64 GNU/Linux

root@kam:~# lsb_release -a
Distributor ID:	Debian
Description:	Debian GNU/Linux 12 (bookworm)
Release:	12
Codename:	bookworm

root@kam:~# kamailio -I
Print out of kamailio internals
  Version: kamailio 5.9.0-dev1 (x86_64/linux) 
  Default config: /usr/local/etc/kamailio/kamailio.cfg
  Default paths to modules: /usr/local/lib64/kamailio/modules
  Compile flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, 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
  MAX_RECV_BUFFER_SIZE=262144
  MAX_SEND_BUFFER_SIZE=262144
  MAX_URI_SIZE=1024
  BUF_SIZE=65535
  DEFAULT PKG_SIZE=8MB
  DEFAULT SHM_SIZE=64MB
  ADAPTIVE_WAIT_LOOPS=1024
  TCP poll methods: poll, epoll_lt, epoll_et, sigio_rt, select
  Source code revision ID: unknown 
  Compiled with: gcc 12.2.0
  Compiled architecture: x86_64
  Compiled on: 16:39:25 Apr 23 2024
Thank you for flying kamailio!

setup

  1. compile kamalio and all modules outlined in kamailio.cfg (a simplified version of a routing config with the most popular modules loaded to ensure none of them crash from the changes)
  2. install mariadb-server and run kamdbctl create
  3. add test table / data to kamailio DB using test.sql
  4. create a self signed key/cert pair in /usr/local/etc/kamailio
  5. configure network defines per your server in /usr/local/etc/kamailio/kamailio.cfg
  6. run kamailio: kamailio -P /var/run/kamailio/kamailio.pid -m 512 -M 128 -E -e -DD

run test

send a call via any uac to the server and watch the output from the foreground kamailio process:

(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:876:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] test1: -2,147,483,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:877:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] test2: 0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:878:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] test3: 2,147,483,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:879:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] test4: 4,294,967,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:881:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (local) var(test1)=-2147483000 vn(test1)=-2147483000 avp(test1)=-2147483000 shv(test1)=-2147483000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:883:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (local) var(test2)=0 vn(test2)=0 avp(test2)=0 shv(test2)=0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:885:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (local) var(test3)=2147483000 vn(test3)=2147483000 avp(test3)=2147483000 shv(test3)=2147483000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:887:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (local) var(test4)=-296 vn(test4)=-296 avp(test4)=-296 shv(test4)=-296
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:889:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (signed) test1: -2,147,483,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:890:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (signed) test2: 0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:891:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (signed) test3: 2,147,483,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:892:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (unsigned) test4: 0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:893:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (unsigned) test5: 2,147,483,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:894:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (unsigned) test6: 4,294,967,000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:896:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test1)=-2147483000 vn(test1)=-2147483000 avp(test1)=-2147483000 shv(test1)=-2147483000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:898:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test2)=0 vn(test2)=0 avp(test2)=0 shv(test2)=0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:900:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test3)=2147483000 vn(test3)=2147483000 avp(test3)=2147483000 shv(test3)=2147483000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:902:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test4)=0 vn(test4)=0 avp(test4)=0 shv(test4)=0
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:904:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test5)=2147483000 vn(test5)=2147483000 avp(test5)=2147483000 shv(test5)=2147483000
(65041) INFO: [/usr/local/etc/kamailio/kamailio.cfg:906:DEFAULT_ROUTE] [skpqdsqmwemdnhx@devbox1:INVITE:<null>] (db) var(test6)=4294967000 vn(test6)=4294967000 avp(test6)=4294967000 shv(test6)=4294

The private variables hold the correct unsigned value with the patches applied..

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