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rpid.c
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rpid.c
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/*
* Copyright (C) 2001-2003 FhG Fokus
*
* 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
*
*/
/*!
* \file
* \brief Remote-Party-ID related functions
* \ingroup auth
* - Module: \ref auth
*/
#include <string.h>
#include <strings.h>
#include "../../core/str.h"
#include "../../core/data_lump.h"
#include "../../core/dprint.h"
#include "../../core/mem/mem.h"
#include "../../core/parser/parse_nameaddr.h"
#include "../../core/parser/parse_uri.h"
#include "../../core/parser/parser_f.h"
#include "../../core/ut.h"
#include "../../core/pvar.h"
#include "checks.h"
#include "rpid.h"
#define RPID_HF_NAME "Remote-Party-ID: "
#define RPID_HF_NAME_LEN (sizeof(RPID_HF_NAME) - 1)
extern str rpid_prefix; /*!< Remote-Party-ID prefix */
extern str rpid_suffix; /*!< Remote-Party-ID suffix */
/* rpid AVP specs */
static unsigned short rpid_avp_type;
static int_str rpid_avp_name;
/*!
* \brief Parse and set the RPID AVP specs
* \param rpid_avp_param RPID AVP parameter
* \return 0 on success, -1 on failure
*/
int init_rpid_avp(char *rpid_avp_param)
{
pv_spec_t avp_spec;
str stmp;
if (rpid_avp_param && *rpid_avp_param) {
stmp.s = rpid_avp_param; stmp.len = strlen(stmp.s);
if (pv_parse_spec(&stmp, &avp_spec)==0
|| avp_spec.type!=PVT_AVP) {
LM_ERR("malformed or non AVP %s AVP definition\n", rpid_avp_param);
return -1;
}
if(pv_get_avp_name(0, &(avp_spec.pvp), &rpid_avp_name,
&rpid_avp_type)!=0)
{
LM_ERR("[%s]- invalid AVP definition\n", rpid_avp_param);
return -1;
}
} else {
rpid_avp_name.n = 0;
rpid_avp_type = 0;
}
return 0;
}
/*!
* \brief Gets the RPID avp specs
* \param rpid_avp_p AVP name
* \param rpid_avp_type_p AVP type
*/
void get_rpid_avp( int_str *rpid_avp_p, int *rpid_avp_type_p )
{
*rpid_avp_p = rpid_avp_name;
*rpid_avp_type_p = rpid_avp_type;
}
/*!
* \brief Append RPID helper function
* \param _m SIP message
* \param _s appended string
* \note Copy of append_hf_helper from textops
* \return 0 on success, negative on failure
*/
static inline int append_rpid_helper(struct sip_msg* _m, str *_s)
{
struct lump* anchor;
if (parse_headers(_m, HDR_EOH_F, 0) == -1) {
LM_ERR("failed to parse message\n");
return -1;
}
anchor = anchor_lump(_m, _m->unparsed - _m->buf, 0, 0);
if (!anchor) {
LM_ERR("can't get anchor\n");
return -2;
}
if (!insert_new_lump_before(anchor, _s->s, _s->len, 0)) {
LM_ERR("can't insert lump\n");
return -3;
}
return 0;
}
/*!
* \brief Append RPID header field to the message
* \param _m SIP message
* \param _s1 unused
* \param _s2 unused
* \return 1 on success, -1 on failure
*/
int append_rpid_hf(struct sip_msg* _m, char* _s1, char* _s2)
{
struct usr_avp *avp;
str rpid_hf, rpid;
char *at;
int_str val;
if (rpid_avp_name.n==0) {
LM_ERR("rpid avp not defined\n");
return -1;
}
if ( (avp=search_first_avp( rpid_avp_type , rpid_avp_name, &val, 0))==0 ) {
LM_DBG("no rpid AVP\n");
return -1;
}
if ( !(avp->flags&AVP_VAL_STR) || !val.s.s || !val.s.len) {
LM_DBG("empty or non-string rpid, nothing to append\n");
return -1;
}
rpid = val.s;
rpid_hf.len = RPID_HF_NAME_LEN + rpid_prefix.len + rpid.len
+ rpid_suffix.len + CRLF_LEN;
rpid_hf.s = pkg_malloc(rpid_hf.len);
if (!rpid_hf.s) {
PKG_MEM_ERROR;
return -1;
}
at = rpid_hf.s;
memcpy(at, RPID_HF_NAME, RPID_HF_NAME_LEN);
at += RPID_HF_NAME_LEN;
memcpy(at, rpid_prefix.s, rpid_prefix.len);
at += rpid_prefix.len;
memcpy(at, rpid.s, rpid.len);
at += rpid.len;
memcpy(at, rpid_suffix.s, rpid_suffix.len);
at += rpid_suffix.len;
memcpy(at, CRLF, CRLF_LEN);
if (append_rpid_helper(_m, &rpid_hf) < 0) {
pkg_free(rpid_hf.s);
return -1;
}
return 1;
}
/*!
* \brief Append RPID header field to the message with parameters
* \param _m SIP message
* \param _prefix prefix
* \param _suffix suffix
* \return 1 on success, -1 on failure
*/
int append_rpid_hf_p(struct sip_msg* _m, char* _prefix, char* _suffix)
{
struct usr_avp *avp;
str rpid_hf, rpid;
char* at;
str* p, *s;
int_str val;
if (rpid_avp_name.n==0) {
LM_ERR("rpid avp not defined\n");
return -1;
}
if ( (avp=search_first_avp( rpid_avp_type , rpid_avp_name, &val, 0))==0 ) {
LM_DBG("no rpid AVP\n");
return -1;
}
if ( !(avp->flags&AVP_VAL_STR) || !val.s.s || !val.s.len) {
LM_DBG("empty or non-string rpid, nothing to append\n");
return -1;
}
rpid = val.s;
p = (str*)_prefix;
s = (str*)_suffix;
rpid_hf.len = RPID_HF_NAME_LEN + p->len + rpid.len + s->len + CRLF_LEN;
rpid_hf.s = pkg_malloc(rpid_hf.len);
if (!rpid_hf.s) {
PKG_MEM_ERROR;
return -1;
}
at = rpid_hf.s;
memcpy(at, RPID_HF_NAME, RPID_HF_NAME_LEN);
at += RPID_HF_NAME_LEN;
memcpy(at, p->s, p->len);
at += p->len;
memcpy(at, rpid.s, rpid.len);
at += rpid.len;
memcpy(at, s->s, s->len);
at += s->len;
memcpy(at, CRLF, CRLF_LEN);
if (append_rpid_helper(_m, &rpid_hf) < 0) {
pkg_free(rpid_hf.s);
return -1;
}
return 1;
}
/*!
* \brief Check if URI in RPID AVP contains an E164 user part
* \param _m SIP message
* \param _s1 unused
* \param _s2 unused
* \return 1 if the URI contains an E164 user part, -1 if not
*/
int is_rpid_user_e164(struct sip_msg* _m, char* _s1, char* _s2)
{
struct usr_avp *avp;
name_addr_t parsed;
str tmp, rpid;
struct sip_uri uri;
int_str val;
if (rpid_avp_name.n==0) {
LM_ERR("rpid avp not defined\n");
return -1;
}
if ( (avp=search_first_avp( rpid_avp_type , rpid_avp_name, &val, 0))==0 ) {
LM_DBG("no rpid AVP\n");
goto err;
}
if ( !(avp->flags&AVP_VAL_STR) || !val.s.s || !val.s.len) {
LM_DBG("empty or non-string rpid, nothing to append\n");
return -1;
}
rpid = val.s;
if (find_not_quoted(&rpid, '<')) {
if (parse_nameaddr(&rpid, &parsed) < 0) {
LM_ERR("failed to parse RPID\n");
goto err;
}
tmp = parsed.uri;
} else {
tmp = rpid;
}
if (parse_uri(tmp.s, tmp.len, &uri) < 0) {
LM_ERR("failed to parse RPID URI\n");
goto err;
}
return siputils_e164_check(&uri.user);
err:
return -1;
}