/*
* verifies the from address agains the access lists
* defined in the configuration file.
*
* returns a bitmask with ACCESSCTL_SIP, ACCESSCTL_REG
*/
int accesslist_check (struct sockaddr_in from) {
int access = 0;
DEBUGC(DBCLASS_ACCESS,"deny list (SIP):%s",
configuration.hosts_deny_sip? configuration.hosts_deny_sip : "*NULL*");
DEBUGC(DBCLASS_ACCESS,"allow list (SIP):%s",
configuration.hosts_allow_sip? configuration.hosts_allow_sip : "*NULL*");
DEBUGC(DBCLASS_ACCESS,"allow list (REG):%s",
configuration.hosts_allow_reg? configuration.hosts_allow_reg : "*NULL*");
/*
* check DENY list
*/
if ( (configuration.hosts_deny_sip !=NULL) &&
(strcmp(configuration.hosts_deny_sip,"")!=0) ) {
/* non-empty list -> check agains it */
if (process_aclist(configuration.hosts_deny_sip, from)== STS_SUCCESS) {
/* yup - this one is blacklisted */
DEBUGC(DBCLASS_ACCESS,"caught by deny list");
return 0;
}
}
/*
* check SIP allow list
*/
if ( (configuration.hosts_allow_sip !=NULL) &&
(strcmp(configuration.hosts_allow_sip,"")!=0) ) {
/* non-empty list -> check agains it */
if (process_aclist(configuration.hosts_allow_sip, from)==STS_SUCCESS) {
/* SIP access granted */
DEBUGC(DBCLASS_ACCESS,"granted SIP access");
access |= ACCESSCTL_SIP;
}
} else {
access |= ACCESSCTL_SIP;
}
/*
* check SIP registration allow list
*/
if ( (configuration.hosts_allow_reg !=NULL) &&
(strcmp(configuration.hosts_allow_reg,"")!=0) ) {
/* non-empty list -> check agains it */
if (process_aclist(configuration.hosts_allow_reg, from)==STS_SUCCESS) {
/* SIP registration access granted */
DEBUGC(DBCLASS_ACCESS,"granted REG/SIP access");
access |= ACCESSCTL_REG | ACCESSCTL_SIP;
}
} else {
access |= ACCESSCTL_REG;
}
DEBUGC(DBCLASS_ACCESS,"access check =%i", access);
return access;
}
/*
* Processing.
*
*/
int PLUGIN_PROCESS(int stage, sip_ticket_t *ticket){
/* stage contains the PLUGIN_* value - the stage of SIP processing. */
int type;
osip_via_t *via;
struct sockaddr_in from;
type = ticket->direction;
/* Incoming SIP message? */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_bogus_via: type=%i", type);
if (type == REQTYP_INCOMING) {
if((via = osip_list_get(&(ticket->sipmsg->vias), 0)) == NULL) {
WARN("no Via header found in incoming SIP message");
return STS_SUCCESS;
}
get_ip_by_host(via->host, &(from.sin_addr));
/* check for Via IP in configured range */
if ((plugin_cfg.networks != NULL) &&
(strcmp(plugin_cfg.networks, "") !=0) &&
(process_aclist(plugin_cfg.networks, from) == STS_SUCCESS)) {
/* is in list, patch Via header with received from IP */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_bogus_via: replacing a bogus via");
if (sip_patch_topvia(ticket) == STS_FAILURE) {
ERROR("patching inbound Via failed!");
}
}
}
return STS_SUCCESS;
}