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ims_getters.c
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ims_getters.c
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/*
* $Id$
*
* Copyright (C) 2012 Smile Communications, jason.penton@smilecoms.com
* Copyright (C) 2012 Smile Communications, richard.good@smilecoms.com
*
* The initial version of this code was written by Dragos Vingarzan
* (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
* Fruanhofer Institute. It was and still is maintained in a separate
* branch of the original SER. We are therefore migrating it to
* Kamailio/SR and look forward to maintaining it from here on out.
* 2011/2012 Smile Communications, Pty. Ltd.
* ported/maintained/improved by
* Jason Penton (jason(dot)penton(at)smilecoms.com and
* Richard Good (richard(dot)good(at)smilecoms.com) as part of an
* effort to add full IMS support to Kamailio/SR using a new and
* improved architecture
*
* NB: Alot of this code was originally part of OpenIMSCore,
* FhG Fokus.
* Copyright (C) 2004-2006 FhG Fokus
* Thanks for great work! This is an effort to
* break apart the various CSCF functions into logically separate
* components. We hope this will drive wider use. We also feel
* that in this way the architecture is more complete and thereby easier
* to manage in the Kamailio/SR environment
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "../../core/parser/msg_parser.h"
#include "../../core/parser/digest/digest.h"
#include "../../core/parser/parse_to.h"
#include "../../core/parser/parse_expires.h"
#include "../../core/parser/contact/parse_contact.h"
#include "../../core/parser/parse_uri.h"
#include "../../core/parser/parse_rr.h"
#include "../../core/parser/parse_nameaddr.h"
#include "../../core/data_lump.h"
#include "../../core/data_lump_rpl.h"
#include "../../core/parser/parse_from.h"
#include "../../core/parser/parse_content.h"
#include "ims_getters.h"
#include "../../core/parser/parse_ppi_pai.h"
/**
* Delete parameters and stuff from uri.
* @param uri - the string to operate on
*/
static inline void cscf_strip_uri(str *uri)
{
int i;
/* Strip the ending */
i=0;
while(i<uri->len&&uri->s[i]!='@')
i++;
while(i<uri->len&&
uri->s[i]!=':'&&
uri->s[i]!='/'&&
uri->s[i]!='&')
i++;
uri->len=i;
}
/**
* Parses all the contact headers.
* @param msg - the SIP message
* @returns the first contact_body
*/
contact_body_t *cscf_parse_contacts(struct sip_msg *msg)
{
struct hdr_field* ptr;
if (!msg) return 0;
if (parse_headers(msg, HDR_EOH_F, 0)<0){
LM_ERR("Error parsing headers \n");
return 0;
}
if (msg->contact) {
ptr = msg->contact;
while(ptr) {
if (ptr->type == HDR_CONTACT_T) {
if (ptr->parsed==0){
if (parse_contact(ptr)<0){
LM_DBG("error parsing contacts [%.*s]\n",
ptr->body.len,ptr->body.s);
}
}
}
ptr = ptr->next;
}
}
if (!msg->contact) return 0;
return msg->contact->parsed;
}
/**
* Returns the Private Identity extracted from the Authorization header.
* If none found there takes the SIP URI in To without the "sip:" prefix
* \todo - remove the fallback case to the To header
* @param msg - the SIP message
* @param realm - the realm to match in an Authorization header
* @returns the str containing the private id, no mem dup
*/
str cscf_get_private_identity(struct sip_msg *msg, str realm) {
str pi = {0, 0};
struct hdr_field* h = 0;
int ret, i, res;
if ((parse_headers(msg, HDR_AUTHORIZATION_F, 0) != 0) && (parse_headers(msg, HDR_PROXYAUTH_F, 0) != 0)) {
return pi;
}
h = msg->authorization;
if (!msg->authorization) {
goto fallback;
}
if (realm.len && realm.s) {
ret = find_credentials(msg, &realm, HDR_AUTHORIZATION_T, &h);
if (ret < 0) {
ret = find_credentials(msg, &realm, HDR_PROXYAUTH_T, &h);
if (ret < 0) {
goto fallback;
} else {
if (ret >0) {
goto fallback;
}
h = msg->proxy_auth;
}
} else {
if (ret > 0) {
goto fallback;
}
}
}
if (!h)
goto fallback;
res = parse_credentials(h);
if (res != 0) {
LOG(L_ERR, "Error while parsing credentials\n");
return pi;
}
if (h) {
pi = ((auth_body_t*) h->parsed)->digest.username.whole;
if (memchr(pi.s, '@', pi.len) == 0) {
LM_DBG("no domain in username - required for IMPI - falling back to IMPU\n");
goto fallback;
}
}
goto done;
fallback:
pi = cscf_get_public_identity(msg);
if (pi.len > 4 && strncasecmp(pi.s, "sip:", 4) == 0) {
pi.s += 4;
pi.len -= 4;
}
for (i = 0; i < pi.len; i++)
if (pi.s[i] == ';') {
pi.len = i;
break;
}
done:
return pi;
}
/**
* Returns the Private Identity extracted from the Authorization header.
* If none found there takes the SIP URI in To without the "sip:" prefix
* \todo - remove the fallback case to the To header
* @param msg - the SIP message
* @param realm - the realm to match in an Authorization header
* @returns the str containing the private id, no mem dup
*/
str cscf_get_private_identity_from(struct sip_msg *msg, str realm)
{
str pi={0,0};
struct hdr_field* h=0;
int ret,i,res;
if (parse_headers(msg,HDR_AUTHORIZATION_F,0)!=0) {
return pi;
}
h = msg->authorization;
if (!msg->authorization){
goto fallback;
}
if (realm.len && realm.s) {
ret = find_credentials(msg, &realm, HDR_AUTHORIZATION_T, &h);
if (ret < 0) {
goto fallback;
} else
if (ret > 0) {
goto fallback;
}
}
res = parse_credentials(h);
if (res != 0) {
LOG(L_ERR, "Error while parsing credentials\n");
return pi;
}
if (h) pi=((auth_body_t*)h->parsed)->digest.username.whole;
goto done;
fallback:
pi = cscf_get_public_identity_from(msg);
if (pi.len>4&&strncasecmp(pi.s,"sip:",4)==0) {pi.s+=4;pi.len-=4;}
for(i=0;i<pi.len;i++)
if (pi.s[i]==';') {
pi.len=i;
break;
}
done:
return pi;
}
/**
* Returns the Private Identity extracted from the Authorization header.
* If none found there takes the SIP URI in To without the "sip:" prefix
* \todo - remove the fallback case to the To header
* @param msg - the SIP message
* @param realm - the realm to match in an Authorization header
* @returns the str containing the private id, no mem dup
*/
str cscf_get_private_identity_no_realm(struct sip_msg *msg, str realm)
{
str pi={0,0};
struct hdr_field* h=0;
int i;
if (parse_headers(msg,HDR_AUTHORIZATION_F,0)!=0) {
return pi;
}
if (!msg->authorization){
goto fallback;
}
h = msg->authorization;
if (h) pi=((auth_body_t*)h->parsed)->digest.username.whole;
goto done;
fallback:
pi = cscf_get_public_identity(msg);
if (pi.len>4&&strncasecmp(pi.s,"sip:",4)==0) {pi.s+=4;pi.len-=4;}
for(i=0;i<pi.len;i++)
if (pi.s[i]==';') {
pi.len=i;
break;
}
done:
return pi;
}
/**
* Returns the Public Identity extracted from the To header
* @param msg - the SIP message
* @returns the str containing the public id, no mem dup
*/
str cscf_get_public_identity(struct sip_msg *msg)
{
str pu={0,0};
struct to_body *to;
int i;
if (parse_headers(msg,HDR_TO_F,0)!=0) {
return pu;
}
if ( get_to(msg) == NULL ) {
to = (struct to_body*) pkg_malloc(sizeof(struct to_body));
parse_to( msg->to->body.s, msg->to->body.s + msg->to->body.len, to );
msg->to->parsed = to;
}
else to=(struct to_body *) msg->to->parsed;
pu = to->uri;
/* truncate to sip:username@host or tel:number */
for(i=4;i<pu.len;i++)
if (pu.s[i]==';' || pu.s[i]=='?' ||pu.s[i]==':'){
pu.len = i;
}
return pu;
}
/**
* Returns the Public Identity extracted from the From header
* @param msg - the SIP message
* @returns the str containing the public id, no mem dup
*/
str cscf_get_public_identity_from(struct sip_msg *msg)
{
str pu={0,0};
struct to_body *from;
int i;
if (parse_headers(msg,HDR_FROM_F,0)!=0) {
return pu;
}
if ( get_from(msg) == NULL ) {
from = (struct to_body*) pkg_malloc(sizeof(struct to_body));
parse_to( msg->from->body.s, msg->from->body.s + msg->from->body.len, from );
msg->from->parsed = from;
}
else from=(struct to_body *) msg->from->parsed;
pu = from->uri;
/* truncate to sip:username@host or tel:number */
for(i=4;i<pu.len;i++)
if (pu.s[i]==';' || pu.s[i]=='?' ||pu.s[i]==':'){
pu.len = i;
}
return pu;
}
/**
* Returns the expires value from the Expires header in the message.
* It searches into the Expires header and if not found returns -1
* @param msg - the SIP message, if available
* @is_shm - msg from from shared memory
* @returns the value of the expire or -1 if not found
*/
int cscf_get_expires_hdr(struct sip_msg *msg, int is_shm)
{
exp_body_t *exp;
int expires;
if (!msg) return -1;
/*first search in Expires header */
if (parse_headers(msg,HDR_EXPIRES_F,0)!=0) {
return -1;
}
if (msg->expires){
if (!msg->expires->parsed) {
parse_expires(msg->expires);
}
if (msg->expires->parsed) {
exp = (exp_body_t*) msg->expires->parsed;
if (exp->valid) {
expires = exp->val;
if(is_shm) {
free_expires((exp_body_t**)&exp);
msg->expires->parsed = 0;
}
return expires;
}
}
}
return -1;
}
/**
* Returns the expires value from the message.
* First it searches into the Expires header and if not found it also looks
* into the expires parameter in the contact header
* @param msg - the SIP message
* @param is_shm - msg from shared memory
* @returns the value of the expire or the default 3600 if none found
*/
int cscf_get_max_expires(struct sip_msg *msg, int is_shm)
{
unsigned int exp;
int max_expires = -1;
struct hdr_field *h;
contact_t *c;
/*first search in Expires header */
max_expires = cscf_get_expires_hdr(msg, is_shm);
cscf_parse_contacts(msg);
for(h=msg->contact;h;h=h->next){
if (h->type==HDR_CONTACT_T && h->parsed) {
for(c=((contact_body_t *) h->parsed)->contacts;c;c=c->next){
if(c->expires){
if (!str2int(&(c->expires->body), (unsigned int*)&exp) && (int)exp>max_expires) max_expires = exp;
}
}
}
}
if(is_shm){
for(h=msg->contact;h;h=h->next){
if (h->type==HDR_CONTACT_T && h->parsed) {
free_contact((contact_body_t**)&(h->parsed));
h->parsed = 0;
}
}
}
return max_expires;
}
/**
* Get the Public Identity from the Request URI of the message
* NB: free returned result str when done from shm
* @param msg - the SIP message
* @returns the public identity (don't forget to free from shm)
*/
str cscf_get_public_identity_from_requri(struct sip_msg *msg)
{
str pu={0,0};
if (msg->first_line.type!=SIP_REQUEST) {
return pu;
}
if (parse_sip_msg_uri(msg)<0){
return pu;
}
if(msg->parsed_uri.type==TEL_URI_T){
pu.len = 4 + msg->parsed_uri.user.len ;
pu.s = shm_malloc(pu.len+1);
if (!pu.s){
LM_ERR("cscf_get_public_identity_from_requri: Error allocating %d bytes\n", pu.len + 1);
pu.len = 0;
goto done;
}
sprintf(pu.s,"tel:%.*s",
msg->parsed_uri.user.len,
msg->parsed_uri.user.s);
}else{
pu.len = 4 + msg->parsed_uri.user.len + 1 + msg->parsed_uri.host.len;
pu.s = shm_malloc(pu.len+1);
if (!pu.s){
LM_ERR("cscf_get_public_identity_from_requri: Error allocating %d bytes\n", pu.len + 1);
pu.len = 0;
goto done;
}
sprintf(pu.s,"sip:%.*s@%.*s",
msg->parsed_uri.user.len,
msg->parsed_uri.user.s,
msg->parsed_uri.host.len,
msg->parsed_uri.host.s);
}
done:
return pu;
}
/**
* Get the contact from the Request URI of the message
* NB: free returned result str when done from shm
* @param msg - the SIP message
* @returns the contact (don't forget to free from shm)
*
* NOTE: should only be called when REQ URI has been converted sip:user@IP_ADDRESS:PORT or tel:IP_ADDRESS:PORT
*/
str cscf_get_contact_from_requri(struct sip_msg *msg)
{
str pu={0,0};
if (msg->first_line.type!=SIP_REQUEST) {
return pu;
}
if (parse_sip_msg_uri(msg)<0){
return pu;
}
if(!msg->parsed_uri.port.len){
return pu;
}
if(msg->parsed_uri.type==TEL_URI_T){
pu.len = 4 + msg->parsed_uri.user.len + msg->parsed_uri.port.len + 1 /*for colon before port*/;
pu.s = shm_malloc(pu.len+1);
if (!pu.s){
LM_ERR("cscf_get_public_identity_from_requri: Error allocating %d bytes\n", pu.len + 1);
pu.len = 0;
goto done;
}
sprintf(pu.s,"tel:%.*s:%.*s",
msg->parsed_uri.user.len,
msg->parsed_uri.user.s,
msg->parsed_uri.port.len,
msg->parsed_uri.port.s);
}else{
pu.len = 4 + msg->parsed_uri.user.len + 1/*for @*/ + msg->parsed_uri.host.len + msg->parsed_uri.port.len + 1 /*for colon before port*/;
pu.s = shm_malloc(pu.len+1);
if (!pu.s){
LM_ERR("cscf_get_public_identity_from_requri: Error allocating %d bytes\n", pu.len + 1);
pu.len = 0;
goto done;
}
sprintf(pu.s,"sip:%.*s@%.*s:%.*s",
msg->parsed_uri.user.len,
msg->parsed_uri.user.s,
msg->parsed_uri.host.len,
msg->parsed_uri.host.s,
msg->parsed_uri.port.len,
msg->parsed_uri.port.s);
}
done:
return pu;
}
/**
* Finds if the message contains the orig parameter in the first Route header
* @param msg - the SIP message
* @param str1 - not used
* @param str2 - not used
* @returns #CSCF_RETURN_TRUE if yes, else #CSCF_RETURN_FALSE
*/
int cscf_has_originating(struct sip_msg *msg,char *str1,char *str2)
{
//int ret=CSCF_RETURN_FALSE;
struct hdr_field *h;
str* uri;
rr_t *r;
if (parse_headers(msg, HDR_ROUTE_F, 0)<0){
LM_DBG("I_originating: error parsing headers\n");
return CSCF_RETURN_FALSE;
}
h = msg->route;
if (!h){
LM_DBG("I_originating: Header Route not found\n");
return CSCF_RETURN_FALSE;
}
if (parse_rr(h)<0){
LM_DBG("I_originating: Error parsing as Route header\n");
return CSCF_RETURN_FALSE;
}
r = (rr_t*)h->parsed;
uri = &r->nameaddr.uri;
struct sip_uri puri;
if (parse_uri(uri->s, uri->len, &puri) < 0) {
LM_DBG( "I_originating: Error while parsing the first route URI\n");
return -1;
}
if (puri.params.len < 4) return CSCF_RETURN_FALSE;
int c = 0;
int state = 0;
while (c < puri.params.len) {
switch (puri.params.s[c]) {
case 'o': if (state==0) state=1;
break;
case 'r': if (state==1) state=2;
break;
case 'i': if (state==2) state=3;
break;
case 'g': if (state==3) state=4;
break;
case ' ':
case '\t':
case '\r':
case '\n':
case ',':
case ';':
if (state==4) return CSCF_RETURN_TRUE;
state=0;
break;
case '=': if (state==4) return CSCF_RETURN_TRUE;
state=-1;
break;
default: state=-1;
}
c++;
}
return state==4 ? CSCF_RETURN_TRUE : CSCF_RETURN_FALSE;
}
str s_asserted_identity={"P-Asserted-Identity",19};
/**
* Looks for the P-Asserted-Identity header and extracts its content
* @param msg - the sip message
* @returns the asserted identity
*/
str cscf_get_asserted_identity(struct sip_msg *msg, int is_shm) {
int len;
str uri = { 0, 0 };
if (!msg || !msg->pai)
return uri;
if ((parse_pai_header(msg) == 0) && (msg->pai) && (msg->pai->parsed)) {
to_body_t *pai = get_pai(msg)->id;
if (!is_shm)
return pai->uri;
//make a pkg malloc str to return to consuming function
len = pai->uri.len + 1;
uri.s = (char*) pkg_malloc(pai->uri.len + 1);
if (!uri.s) {
LM_ERR("no more pkg mem\n");
return uri;
}
memset(uri.s, 0, len);
memcpy(uri.s, pai->uri.s, pai->uri.len);
uri.len = pai->uri.len;
p_id_body_t* ptr = (p_id_body_t*) msg->pai->parsed;
msg->pai->parsed = 0;
free_pai_ppi_body(ptr);
}
return uri;
}
static str phone_context_s={";phone-context=",15};
/**
* Extracts the realm from a SIP/TEL URI.
* - SIP - the hostname
* - TEL - the phone-context parameter
* @param msg - the SIP message
* @returns the realm
*/
str cscf_get_realm_from_uri(str uri)
{
str realm={0,0};
int i;
if (uri.len<5) {
LM_DBG( "cscf_get_realm_from_uri: Error trying to extra realm from too short URI <%.*s>.\n",uri.len,uri.s);
return realm;
}
if (strncasecmp(uri.s,"sip:",4)==0||
strncasecmp(uri.s,"sips:",5)==0) {
/* SIP URI */
realm = uri;
for(i=0;i<realm.len;i++)
if (realm.s[i]=='@'){
realm.s = realm.s + i + 1;
realm.len = realm.len - i - 1;
break;
}
if (!realm.len) realm = uri;
for(i=0;i<realm.len;i++)
if (realm.s[i]==';'||realm.s[i]=='&'||realm.s[i]==':') {
realm.len = i;
break;
}
}else
if (strncasecmp(uri.s,"tel:",4)==0) {
/* TEL URI */
realm = uri;
while(realm.s[0]!=';' && realm.len>0){
realm.s++;
realm.len--;
}
if (realm.len<1) {realm.len=0;return realm;}
else{
while(realm.len>phone_context_s.len){
if (strncasecmp(realm.s,phone_context_s.s,phone_context_s.len)==0){
realm.s+=phone_context_s.len;
realm.len-=phone_context_s.len;
for(i=0;i<realm.len;i++)
if (realm.s[i]==';' || realm.s[i]=='&'){
realm.len = i;
break;
}
break;
}
realm.s++;
realm.len--;
}
}
}else{
/* unknown... just extract between @ and ;? */
realm = uri;
for(i=0;i<realm.len;i++)
if (realm.s[i]=='@'){
realm.s = realm.s + i + 1;
realm.len = realm.len - i - 1;
break;
}
if (!realm.len) realm = uri;
for(i=0;i<realm.len;i++)
if (realm.s[i]==';'||realm.s[i]=='&'||realm.s[i]==':') {
realm.len = i;
break;
}
}
LM_DBG( "cscf_get_realm_from_uri: realm <%.*s>.\n",realm.len,realm.s);
return realm;
}
/**
* Delivers the Realm from request URI
* @param msg sip message
* @returns realm as String on success 0 on fail
*/
str cscf_get_realm_from_ruri(struct sip_msg *msg)
{
str realm={0,0};
if (!msg || msg->first_line.type!=SIP_REQUEST){
LM_DBG("cscf_get_realm_from_ruri: This is not a request!!!\n");
return realm;
}
if (!msg->parsed_orig_ruri_ok)
if (parse_orig_ruri(msg) < 0)
return realm;
realm = msg->parsed_orig_ruri.host;
return realm;
}
/**
* Looks for the Call-ID header
* @param msg - the sip message
* @param hr - ptr to return the found hdr_field
* @returns the callid value
*/
str cscf_get_call_id(struct sip_msg *msg,struct hdr_field **hr)
{
struct hdr_field *h;
str call_id={0,0};
if (hr) *hr = 0;
if (!msg) return call_id;
if (parse_headers(msg, HDR_CALLID_F, 0)<0){
LM_DBG("cscf_get_call_id: error parsing headers\n");
return call_id;
}
h = msg->callid;
if (!h){
LM_DBG("cscf_get_call_id: Header Call-ID not found\n");
return call_id;
}
if (hr) *hr = h;
call_id = h->body;
return call_id;
}
static str sos_uri_par={"sos", 3};
/**
* Check if the contact has an URI parameter with the value "sos",
* used for detecting an Emergency Registration
* http://tools.ietf.org/html/draft-patel-ecrit-sos-parameter-0x
* @param uri - contact uri to be checked
* @return 1 if found, 0 if not, -1 on error
*/
int cscf_get_sos_uri_param(str uri)
{
struct sip_uri puri;
param_hooks_t h;
param_t *p=0, *crt;
enum pclass p_class = CLASS_URI;
int ret;
ret = 0;
p = NULL;
if(parse_uri(uri.s, uri.len, &puri)<0){
LM_DBG("cscf_get_sos_uri_param: failed to parse %.*s\n",
uri.len, uri.s);
return -1;
}
if(puri.params.len <= 0)
return 0;
LM_DBG( "cscf_get_sos_uri_param: searching through the uri parameters:%.*s\n",
puri.params.len, puri.params.s);
if(parse_params(&(puri.params), p_class, &h, &p)){
LM_DBG( "cscf_get_sos_uri_param:error while parsing uri parameters\n");
ret = -1;
goto end;
}
for(crt = p ; crt ; crt=crt->next){
LM_DBG( "cscf_get_sos_uri_param:name: %.*s body: %.*s\n",
crt->name.len, crt->name.s,
crt->body.len, crt->body.s);
if((crt->name.len == sos_uri_par.len) &&
(strncmp(crt->name.s, sos_uri_par.s, sos_uri_par.len) == 0)){
ret =1;
goto end;
}
}
end:
if(p) free_params(p);
return ret;
}
str cscf_p_visited_network_id={"P-Visited-Network-ID",20};
/**
* Return the P-Visited-Network-ID header
* @param msg - the SIP message
* @returns the str with the header's body
*/
str cscf_get_visited_network_id(struct sip_msg *msg, struct hdr_field **h)
{
str vnid={0,0};
struct hdr_field *hdr;
if (h) *h=0;
if (parse_headers(msg,HDR_EOH_F,0)!=0) {
LM_DBG("cscf_get_visited_network_id: Error parsing until header EOH: \n");
return vnid;
}
hdr = msg->headers;
while(hdr){
if (hdr->name.len==cscf_p_visited_network_id.len &&
strncasecmp(hdr->name.s,cscf_p_visited_network_id.s,hdr->name.len)==0)
{
if (h) *h = hdr;
vnid = hdr->body;
goto done;
}
hdr = hdr->next;
}
LM_DBG("cscf_get_visited_network_id: P-Visited-Network-ID header not found \n");
done:
LM_DBG("cscf_get_visited_network_id: <%.*s> \n",
vnid.len,vnid.s);
return vnid;
}
/**
* Adds a header to the message as the first one in the message
* @param msg - the message to add a header to
* @param content - the str containing the new header
* @returns 1 on succes, 0 on failure
*/
int cscf_add_header_first(struct sip_msg *msg, str *hdr,int type)
{
struct hdr_field *first;
struct lump* anchor,*l;
first = msg->headers;
anchor = anchor_lump(msg, first->name.s - msg->buf, 0 , 0 );
if (anchor == NULL) {
LM_DBG( "cscf_add_header_first: anchor_lump failed\n");
return 0;
}
if (!(l=insert_new_lump_before(anchor, hdr->s,hdr->len,type))){
LM_ERR( "cscf_add_header_first: error creating lump for header\n" );
return 0;
}
return 1;
}
/**
* Returns the next header structure for a given header name.
* @param msg - the SIP message to look into
* @param header_name - the name of the header to search for
* @param last_header - last header to ignore in the search, or NULL if to start from the first one
* @returns the hdr_field on success or NULL if not found
*/
struct hdr_field* cscf_get_next_header(struct sip_msg * msg ,
str header_name,struct hdr_field* last_header)
{
struct hdr_field *h;
if (parse_headers(msg, HDR_EOH_F, 0)<0){
LM_ERR("cscf_get_next_header_field: error parsing headers\n");
return NULL;
}
if (last_header) h = last_header->next;
else h = msg->headers;
while(h){
if (h->name.len==header_name.len &&strncasecmp(h->name.s,header_name.s,header_name.len)==0)
break;
h = h->next;
}
return h;
}
/**
* Looks for the First Via header and returns its body.
* @param msg - the SIP message
* @param h - the hdr_field to fill with the result
* @returns the first via_body
*/
struct via_body* cscf_get_first_via(struct sip_msg *msg,struct hdr_field **h)
{
if (h) *h = 0;
if (!msg->h_via1 && parse_headers(msg,HDR_VIA_F,0)!=0) {
LM_ERR("cscf_get_first_via: Error parsing until header Via: \n");
return msg->h_via1->parsed;
}
if (!msg->via1){
LM_ERR( "cscf_get_first_via: Message does not contain Via header.\n");
return msg->h_via1->parsed;
}
return msg->h_via1->parsed;
}
/**
* Looks for the UE Via in First Via header if its a request
* or in the last if its a response and returns its body
* @param msg - the SIP message
* @returns the via of the UE
*/
struct via_body* cscf_get_ue_via(struct sip_msg *msg)
{
struct via_body *vb=0;
if (msg->first_line.type==SIP_REQUEST) vb = cscf_get_first_via(msg,0);
else vb = cscf_get_last_via(msg);
if (!vb) return 0;
if (vb->port == 0) vb->port=5060;
return vb;
}
/**
* Looks for the Last Via header and returns it.
* @param msg - the SIP message
* @returns the last via body body
*/
struct via_body* cscf_get_last_via(struct sip_msg *msg)
{
struct hdr_field *h=0,*i;
struct via_body *vb;
if (parse_headers(msg,HDR_EOH_F,0)!=0) {
LM_ERR("cscf_get_last_via: Error parsing until last header\n");
return 0;
}
i = msg->headers;
while(i){
if (i->type == HDR_VIA_T){
h = i;
}
i = i->next;
}
if (!h) return 0;
if (!h->parsed){
vb = pkg_malloc(sizeof(struct via_body));
if (!vb){
LM_ERR("cscf_get_last_via: Error allocating %lx bytes\n",sizeof(struct via_body));
return 0;
}
parse_via(h->body.s,h->body.s+h->body.len,vb);
h->parsed = vb;
}
vb = h->parsed;
while(vb->next)
vb = vb->next;
return vb;
}
/**
* Looks for the WWW-Authenticate header and returns its body.
* @param msg - the SIP message
* @param h - the hdr_field to fill with the result
* @returns the www-authenticate body
*/
str cscf_get_authenticate(struct sip_msg *msg,struct hdr_field **h)
{
str auth={0,0};
struct hdr_field *hdr;
*h = 0;
if (parse_headers(msg,HDR_EOH_F,0)!=0) {
LM_ERR("cscf_get_authorization: Error parsing until header WWW-Authenticate: \n");
return auth;
}
hdr = msg->headers;
while(hdr){
if (hdr->name.len ==16 &&
strncasecmp(hdr->name.s,"WWW-Authenticate",16)==0)
{
*h = hdr;
auth = hdr->body;
break;
}
hdr = hdr->next;
}
if (!hdr){
LM_DBG( "cscf_get_authorization: Message does not contain WWW-Authenticate header.\n");