DeforaNetworks/siproxd
DeforaNetworks/siproxd
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plugin_stripheader: may now strip just a particular value from the headers

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This commit is contained in:
Thomas Ries 2015-07-02 10:20:33 +00:00
parent 3e9c2d3455
commit 927223b12b
3 changed files with 73 additions and 32 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
0.8.2
=====
02-Jul-2015: - fixed a possible SEGV in sip_find_direction()
- plugin_stripheader: may now strip just a particular value
from the headers
26-Jan-2015: - added plugin_codecfilter (remove particular codecs in SDP
payloads)
20-Jan-2015: - added plugin_stripheader (remove particular SIP headers

6
doc/siproxd.conf.example
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@ -431,8 +431,14 @@ plugin_regex_replace = \1:001
# May be used to workaround IP fragmentation by removing "unimportant"
# SIP headers - this is clearly a ugly hack but sometimes saves on
# from headache.
# Format is <header>[:<value>], the :<value> part is optional - if not
# present the full header will be removed.
#
# remove entire header (all values attached to this header)
plugin_stripheader_remove = Allow
plugin_stripheader_remove = User-Agent
# remove only a particular value from a header (no spaces allowed)
plugin_stripheader_remove = Supported:100rel
######################################################################
# Plugin_codecfilter

96
src/plugin_stripheader.c
View File

@ -94,57 +94,89 @@ int PLUGIN_PROCESS(int stage, sip_ticket_t *ticket){
/* stage contains the PLUGIN_* value - the stage of SIP processing. */
int i;
int pos;
char *header_remove=NULL;
char *header_remove_args=NULL;
int dlc=65535; /* deadlock counter... - just a life insurance */
for (i=0; i<plugin_cfg.header_remove.used; i++) {
DEBUGC(DBCLASS_PLUGIN, "%s: looking for header [%s], entry=%i", name,
plugin_cfg.header_remove.string[i], i);
if (strchr(plugin_cfg.header_remove.string[i],':')) {
int len=strchr(plugin_cfg.header_remove.string[i],':') - plugin_cfg.header_remove.string[i];
header_remove = strndup(plugin_cfg.header_remove.string[i], len);
header_remove_args = strdup(strchr(plugin_cfg.header_remove.string[i],':')+1);
} else {
header_remove = strdup(plugin_cfg.header_remove.string[i]);
}
#if 0
int j=0;
osip_header_t *tmp;
DEBUGC(DBCLASS_PLUGIN, "%s: header list size=%i", name,
osip_list_size(&ticket->sipmsg->headers));
while (osip_list_size(&ticket->sipmsg->headers) > j) {
tmp = (osip_header_t *) osip_list_get(&ticket->sipmsg->headers, j);
DEBUGC(DBCLASS_PLUGIN, "%s: header list j=%i, hname=%s, hvalue=%s", name,
j, tmp->hname, tmp->hvalue);
// if (osip_strcasecmp(tmp->hname, hname) == 0) {
// *dest = tmp;
// return i;
// }
j++;
}
#endif
/* special case Allow header */
if (strcasecmp(plugin_cfg.header_remove.string[i], "allow") == 0) {
if (strcasecmp(header_remove, "allow") == 0) {
osip_allow_t *allow=NULL;
pos=0;
while ((pos = osip_message_get_allow(ticket->sipmsg,
0, &allow)) != -1) {
DEBUGC(DBCLASS_PLUGIN, "%s: removing Allow header pos=%i, val=%s", name,
pos, allow->value);
osip_list_remove(&ticket->sipmsg->allows, pos);
osip_allow_free(allow);
allow=NULL;
pos, &allow)) != -1) {
if (--dlc <= 0) { ERROR("deadlock counter has triggered. Likely a bug in code."); return STS_FAILURE;}
if (header_remove_args == NULL) {
/* remova all values for header */
DEBUGC(DBCLASS_PLUGIN, "%s: removing Allow header pos=%i, val=%s", name,
pos, allow->value);
osip_list_remove(&ticket->sipmsg->allows, pos);
osip_allow_free(allow);
allow=NULL;
} else {
/* remove only values "header_remove_args" */
if (osip_strcasecmp(header_remove_args, allow->value) == 0) {
DEBUGC(DBCLASS_PLUGIN, "%s: removing Allow header value pos=%i, val=%s", name,
pos, allow->value);
osip_list_remove(&ticket->sipmsg->allows, pos);
osip_allow_free(allow);
allow=NULL;
} else {
pos++;
}
}
}
/* generic headers */
} else {
osip_header_t *h=NULL;
pos=0;
while ((pos = osip_message_header_get_byname(ticket->sipmsg,
plugin_cfg.header_remove.string[i], 0, &h)) != -1) {
DEBUGC(DBCLASS_PLUGIN, "%s: removing header pos=%i, name=%s, val=%s", name,
pos, h->hname, h->hvalue);
osip_list_remove(&ticket->sipmsg->headers, pos);
osip_header_free(h);
header_remove, pos, &h)) != -1) {
if (--dlc <= 0) { ERROR("deadlock counter has triggered. Likely a bug in code."); return STS_FAILURE;}
if (header_remove_args == NULL) {
/* remova all values for header */
DEBUGC(DBCLASS_PLUGIN, "%s: removing header pos=%i, name=%s, val=%s", name,
pos, h->hname, h->hvalue);
osip_list_remove(&ticket->sipmsg->headers, pos);
osip_header_free(h);
} else {
/* remove only values "header_remove_args" */
if (osip_strcasecmp(header_remove_args, h->hvalue) == 0) {
DEBUGC(DBCLASS_PLUGIN, "%s: removing header value pos=%i, name=%s, val=%s", name,
pos, h->hname, h->hvalue);
osip_list_remove(&ticket->sipmsg->headers, pos);
osip_header_free(h);
h=NULL;
} else {
pos++;
}
} // if header_remove_args
}
}
/* free resources */
if (header_remove_args) {
free (header_remove_args);
header_remove_args = NULL;
}
if (header_remove) {
free (header_remove);
header_remove = NULL;
}
}
return STS_SUCCESS;