Description

According to the documentation for the UAC module, the uac_reg command can accept an optional argument to use the pre-calculated HA1 format:

4.7.  uac_auth([mode])
This function can be called only from failure route and will build the authentication response header and insert it into the request without sending anything.

If mode is set to 1, then the password has to be provided in HA1 format. The parameter can be a static integer or a variable holding an integer value

However, when I attempt to use this in my configuration file, Kamailio fails to start.

Troubleshooting

Reproduction

The problem is reproducible in the 5.4, 5.4-nightly, and dev-nightly debian packages with the following config file:

#!KAMAILIO

loadmodule "tm"
loadmodule "sl"
loadmodule "pv"
loadmodule "uac"
loadmodule "rr"

modparam("uac","auth_username_avp","$avp(auser)")
modparam("uac","auth_password_avp","$avp(apass)")
modparam("uac","auth_realm_avp","$avp(arealm)")



request_route {

    if( $rm == "INVITE" ) {
        t_on_failure("TRUNKAUTH");
    }

    t_relay();
}

failure_route[TRUNKAUTH] {

    $avp(auser)  = "user";
    $avp(arealm) = "realm";
    $avp(apass)  = "password";

    if (uac_auth(1)) {
        t_relay();
    }
    exit;
}

A check on syntax file syntax gives an error of:

$ sudo kamailio -eEc

 0(18427) ERROR: <core> [core/cfg.y:3451]: yyparse(): cfg. parser: failed to find command uac_auth (params 1)
 0(18427) CRITICAL: <core> [core/cfg.y:3592]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 30, column 19: unknown command, missing loadmodule?

ERROR: bad config file (1 errors)

No failures are observed if the parameter is removed from line 30. Changed from if (uac_auth(1)) { to if (uac_auth()) {.

Additional Information

• Kamailio Version - output of kamailio -v

version: kamailio 5.4.4 (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_BLACKLIST, 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 8.3.0

• Operating System:

Linux aarenet-sipdir2 4.19.0-14-cloud-amd64 #1 SMP Debian 4.19.171-2 (2021-01-30) x86_64 GNU/Linux

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