DeforaNetworks/siproxd
DeforaNetworks/siproxd
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plugin_fix_DTAG

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This commit is contained in:
Thomas Ries 2015-08-30 07:38:39 +00:00
parent 437c8215f3
commit 26fd4f57c4
4 changed files with 49 additions and 38 deletions
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2
doc/siproxd.conf.example
View File

@ -393,7 +393,7 @@ plugin_fix_bogus_via_networks = 10.0.0.0/8,172.16.0.0/12,192.168.0.0/16
# responses, causing the received SIP response to be discarded by
# any SIP client that properly checks the Via chain.
# DTAG_networks: Network where DTAG messages are received from.
plugin_fix_DTAG_networks = 217.0.23.100/24
plugin_fix_DTAG_networks = 217.0.23.100/32
######################################################################
# Plugin_stun

6
src/accessctl.c
View File

@ -168,8 +168,12 @@ int process_aclist (char *aclist, struct sockaddr_in from) {
(long)ntohl(from.sin_addr.s_addr) & bitmask);
if ( (ntohl(inaddr.s_addr) & bitmask) ==
(ntohl(from.sin_addr.s_addr) & bitmask) ) return STS_SUCCESS;
(ntohl(from.sin_addr.s_addr) & bitmask) ) {
DEBUGC(DBCLASS_ACCESS, "process_aclist: MATCH");
return STS_SUCCESS;
}
}
DEBUGC(DBCLASS_ACCESS, "process_aclist: no match");
return STS_FAILURE;
}

33
src/plugin_fix_DTAG.c
View File

@ -56,7 +56,7 @@ static cfgopts_t plugin_cfg_opts[] = {
};
/* Prototypes */
static int sip_patch_topvia(sip_ticket_t *ticket);
static int sip_fix_topvia(sip_ticket_t *ticket);
/*
@ -101,27 +101,33 @@ int PLUGIN_PROCESS(int stage, sip_ticket_t *ticket){
type = ticket->direction;
/* Incoming SIP response? */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: type=%i", type);
if (type == RESTYP_INCOMING) {
/* Incoming SIP response? */
if (type == RESTYP_INCOMING) {
/* a Via header needs to be present in response */
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 */
get_ip_by_host(via->host, &(from.sin_addr));
if ((plugin_cfg.networks != NULL) &&
(strcmp(plugin_cfg.networks, "") !=0) &&
(process_aclist(plugin_cfg.networks, ticket->from) == STS_SUCCESS) &&
(process_aclist(plugin_cfg.networks, from) == STS_SUCCESS)) {
/* is in list, patch Via header */
/* VIA & Sender IP are in list, fix Via header */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: replacing a bogus via");
if (sip_patch_topvia(ticket) == STS_FAILURE) {
if (sip_fix_topvia(ticket) == STS_FAILURE) {
ERROR("patching inbound Via failed!");
}
} else {
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: not match, returning.");
}
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: done");
}
return STS_SUCCESS;
}
@ -138,19 +144,21 @@ int PLUGIN_END(plugin_def_t *plugin_def){
}
/*--------------------------------------------------------------------*/
static int sip_patch_topvia(sip_ticket_t *ticket) {
static int sip_fix_topvia(sip_ticket_t *ticket) {
osip_via_t *via;
int sts;
if((via = osip_list_get(&(ticket->sipmsg->vias), 0)) != NULL) {
// 1) check that via header matches criteria (is not local)
if (! is_via_local(via)) {
// 2) remove broken via header
/* 1) IP of Via has been checked beforehand. */
/* 2) remove broken via header */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: removing topmost via");
sts = osip_list_remove(&(ticket->sipmsg->vias), 0);
osip_via_free (via);
via = NULL;
// 3) add my via header
/* 3) add my via header */
DEBUGC(DBCLASS_PLUGIN, "plugin_fix_DTAG: adding new via");
if (ticket->direction == RESTYP_INCOMING) {
sts = sip_add_myvia(ticket, IF_OUTBOUND);
if (sts == STS_FAILURE) {
@ -163,7 +171,6 @@ static int sip_patch_topvia(sip_ticket_t *ticket) {
}
}
}
}
return STS_SUCCESS;
}

20
src/proxy.c
View File

@ -485,6 +485,16 @@ int proxy_response (sip_ticket_t *ticket) {
response=ticket->sipmsg;
/*
* figure out if this is an request coming from the outside
* world to one of our registered clients
*/
sip_find_direction(ticket, NULL);
type = ticket->direction;
/* Call Plugins for stage: PLUGIN_PRE_PROXY */
sts = call_plugins(PLUGIN_PRE_PROXY, ticket);
/*
* RFC 3261, Section 16.7 step 3
* Proxy Behavior - Response Processing - Remove my Via header field value
@ -496,16 +506,6 @@ int proxy_response (sip_ticket_t *ticket) {
return STS_FAILURE;
}
/*
* figure out if this is an request coming from the outside
* world to one of our registered clients
*/
sip_find_direction(ticket, NULL);
type = ticket->direction;
/* Call Plugins for stage: PLUGIN_PRE_PROXY */
sts = call_plugins(PLUGIN_PRE_PROXY, ticket);
/*
* ok, we got a response that we are allowed to process.
*/