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save.c
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save.c
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/*
* mid-registrar contact storing
*
* This module is intended to be used as a middle layer SIP component in
* environments where a large proportion of SIP UAs (e.g. mobile devices)
* register at high enough frequencies that they actually degrade the
* performance of their registrars.
*
* Copyright (C) 2016-2020 OpenSIPS Solutions
*
* This file is part of opensips, a free SIP server.
*
* opensips 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
*
* opensips 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 "mid_registrar.h"
#include "ul_storage.h"
#include "lookup.h"
#include "encode.h"
#include "save.h"
#include "gruu.h"
#include "../../parser/parse_rr.h"
#include "../../parser/parse_uri.h"
#include "../../parser/contact/contact.h"
#include "../../parser/contact/parse_contact.h"
#include "../../parser/parse_methods.h"
#include "../../parser/parse_supported.h"
#include "../../parser/parse_allow.h"
#include "../../dset.h"
#include "../../parser/parse_from.h"
#include "../../daemonize.h"
#include "../../mod_fix.h"
#include "../../data_lump.h"
#include "../../data_lump_rpl.h"
#include "../../lib/reg/common.h"
#include "../../trim.h"
#include "../../strcommon.h"
#include "../usrloc/usrloc.h"
#include "../usrloc/urecord.h"
static struct {
char* buf;
int buf_len;
int data_len;
} contact = {0, 0, 0};
#define RETRY_AFTER "Retry-After: "
#define RETRY_AFTER_LEN (sizeof(RETRY_AFTER) - 1)
int prepare_rpl_path(struct sip_msg *req, str *path, int flags, struct sip_msg *rpl);
/*
* @_e: output param (integer) - value of the ";expires" Contact hf param or "Expires" hf
*/
void calc_contact_expires(struct sip_msg* _m, param_t* _ep, int* _e,
int enforce_expires_limits)
{
if (!_ep || !_ep->body.len) {
*_e = get_expires_hf(_m);
} else {
if (str2int(&_ep->body, (unsigned int*)_e) < 0) {
*_e = default_expires;
}
}
if (enforce_expires_limits) {
if ((*_e != 0) && min_expires && ((*_e) < min_expires))
*_e = min_expires;
if ((*_e != 0) && max_expires && ((*_e) > max_expires))
*_e = max_expires;
}
LM_DBG("expires: %d\n", *_e);
}
/* with the optionally added outgoing timeout extension
*
* @_e: output param (UNIX timestamp) - expiration time on the main registrar
* @egress: if true, the "outgoing_expires" modparam will be applied as a
* minimal value (useful when forcing egress expirations)
*/
void calc_ob_contact_expires(struct sip_msg* _m, param_t* _ep, int* _e, int egress)
{
if (!_ep || !_ep->body.len) {
*_e = get_expires_hf(_m);
} else {
if (str2int(&_ep->body, (unsigned int*)_e) < 0) {
*_e = default_expires;
}
}
/* extend outgoing timeout, thus throttling heavy incoming traffic */
if (reg_mode != MID_REG_MIRROR && egress &&
*_e > 0 && *_e < outgoing_expires)
*_e = outgoing_expires;
/* Convert to absolute value */
if (*_e > 0) *_e += get_act_time();
LM_DBG("outgoing expires: %d\n", *_e);
}
static int trim_to_single_contact(struct sip_msg *msg, str *aor)
{
static str escape_buf;
contact_t *c = NULL;
struct socket_info *send_sock;
struct lump *anchor = NULL;
char *buf;
int e, is_dereg = 1, len, len1;
struct hdr_field *ct;
union sockaddr_union _;
str extra_ct_params, esc_aor, *adv_host, *adv_port;
/* get the source socket on the way to the next hop */
send_sock = uri2sock(msg, GET_NEXT_HOP(msg), &_, PROTO_NONE);
if (!send_sock) {
LM_ERR("failed to obtain next hop socket, ci=%.*s\n",
msg->callid->body.len, msg->callid->body.s);
return -1;
}
adv_host = _get_adv_host(send_sock, msg);
adv_port = _get_adv_port(send_sock, msg);
/* completely remove all Contact hfs, except the last one */
for (ct = msg->contact; ct && ct->sibling; ct = ct->sibling) {
LM_DBG("deleting Contact '%.*s'\n", ct->len, ct->name.s);
anchor = del_lump(msg, ct->name.s - msg->buf, ct->len, HDR_CONTACT_T);
if (!anchor)
return -1;
}
for (c = ((contact_body_t *)ct->parsed)->contacts; c;
c = get_next_contact(c)) {
calc_contact_expires(msg, c->expires, &e, 1);
if (e != 0)
is_dereg = 0;
LM_DBG("deleting Contact '%.*s'\n", c->len, c->name.s);
anchor = del_lump(msg, c->name.s - msg->buf, c->len, HDR_CONTACT_T);
if (!anchor)
return -1;
}
if (!anchor) {
anchor = anchor_lump(msg, msg->unparsed - msg->buf, 0);
if (!anchor) {
LM_ERR("failed to add anchor lump\n");
return -1;
}
}
extra_ct_params = get_extra_ct_params(msg);
if (!reg_use_domain) {
esc_aor = *aor;
} else {
if (pkg_str_extend(&escape_buf, 3 * aor->len + 1) != 0) {
LM_ERR("oom\n");
return -1;
}
esc_aor = escape_buf;
if (escape_param(aor, &esc_aor) != 0) {
LM_ERR("failed to escape AoR string: %.*s\n", aor->len, aor->s);
return -1;
}
}
/* < sip: @ :ddddd */
len = 1 + 4 + esc_aor.len + 1 + adv_host->len + 6 +
extra_ct_params.len + 1 + 9 + 10 + 1;
/* > ;expires=<integer> \0 */
buf = pkg_malloc(len);
if (!buf) {
LM_ERR("oom\n");
return -1;
}
len1 = sprintf(buf, "<sip:%.*s@%.*s:%.*s%.*s>", esc_aor.len, esc_aor.s,
adv_host->len, adv_host->s, adv_port->len, adv_port->s,
extra_ct_params.len, extra_ct_params.s);
if (!msg->expires || msg->expires->body.len == 0) {
len1 += sprintf(buf + len1, ";expires=%d",
is_dereg ? 0 : outgoing_expires);
}
if (len1 >= len) {
LM_BUG("buffer overflow");
abort();
}
LM_DBG("inserting new Contact '%.*s'\n", len1, buf);
if (!insert_new_lump_after(anchor, buf, len1, HDR_CONTACT_T)) {
pkg_free(buf);
return -1;
}
return 0;
}
void free_ct_mappings(struct list_head *mappings)
{
struct list_head *_, *__;
struct ct_mapping *ctmap;
list_for_each_safe(_, __, mappings) {
list_del(_);
ctmap = list_entry(_, struct ct_mapping, list);
shm_free(ctmap->req_ct_uri.s);
shm_free(ctmap->instance.s);
shm_free(ctmap->received.s);
shm_free(ctmap);
}
}
/**
* Overwrites each Contact header field of the request.
* Saves all these mappings to the mri->ct_mappings list.
*/
static int overwrite_req_contacts(struct sip_msg *req,
struct mid_reg_info *mri)
{
contact_t *c = NULL;
urecord_t *r;
ucontact_t *uc;
struct sip_uri puri;
struct socket_info *send_sock;
struct lump *anchor;
str new_username;
char *lump_buf;
int expiry_tick, expires, len, len1;
int cseq;
ucontact_id ctid;
struct ct_mapping *ctmap;
struct list_head *_;
union sockaddr_union __;
str extra_ct_params, ctid_str, *adv_host, *adv_port;
ul.lock_udomain(mri->dom, &mri->aor);
ul.get_urecord(mri->dom, &mri->aor, &r);
if (!r && ul.insert_urecord(mri->dom, &mri->aor, &r, 0) < 0) {
rerrno = R_UL_NEW_R;
LM_ERR("failed to insert new record structure\n");
goto out_err;
}
r->no_clear_ref++;
if (str2int(&get_cseq(req)->number, (unsigned int*)&cseq) < 0) {
rerrno = R_INV_CSEQ;
LM_ERR("failed to convert cseq number, ci: %.*s\n",
req->callid->body.len, req->callid->body.s);
goto out_err;
}
/* get the source socket on the way to the next hop */
send_sock = uri2sock(req, GET_NEXT_HOP(req), &__, PROTO_NONE);
if (!send_sock) {
LM_ERR("failed to obtain next hop socket, ci=%.*s\n",
req->callid->body.len, req->callid->body.s);
goto out_err;
}
adv_host = _get_adv_host(send_sock, req);
adv_port = _get_adv_port(send_sock, req);
c = get_first_contact(req);
list_for_each (_, &mri->ct_mappings) {
if (!c)
break;
ctmap = list_entry(_, struct ct_mapping, list);
/* if uri string points outside the original msg buffer, it means
the URI was already changed, and we cannot do it again */
if (c->uri.s < req->buf || c->uri.s > req->buf + req->len) {
LM_ERR("SCRIPT BUG - second attempt to change URI Contact\n");
goto out_err;
}
ul.get_ucontact(r, &c->uri, &req->callid->body, cseq + 1,
&mri->cmatch, &uc);
if (!uc)
ctid = ul.next_contact_id(r);
else
ctid = uc->contact_id;
ctid_str.s = int2str(ctid, &ctid_str.len);
if (ctid_insertion == MR_APPEND_PARAM) {
if (parse_uri(c->uri.s, c->uri.len, &puri) < 0) {
LM_ERR("failed to parse reply contact uri <%.*s>\n",
c->uri.len, c->uri.s);
goto out_err;
}
new_username = puri.user;
} else {
new_username = ctid_str;
}
calc_ob_contact_expires(req, c->expires, &expiry_tick, 1);
expires = expiry_tick == 0 ? 0 : expiry_tick - get_act_time();
ctmap->ctid = ctid;
if (expires == 0)
ctmap->zero_expires = 1;
anchor = del_lump(req, (c->name.s ? c->name.s : c->uri.s) - req->buf,
c->len, HDR_CONTACT_T);
if (!anchor)
goto out_err;
extra_ct_params = get_extra_ct_params(req);
len = new_username.len + 1 + adv_host->len +
6 /*port*/ + extra_ct_params.len + 2 /*IPv6*/ +
15 /* <sip:>;expires= */ + 10 /* len(expires) */ + 1 /*\0*/ +
(ctid_insertion == MR_APPEND_PARAM ?
ctid_str.len + 2 + ctid_param.len : 0);
lump_buf = pkg_malloc(len);
if (!lump_buf) {
LM_ERR("oom\n");
goto out_err;
}
LM_DBG("building new Contact URI:\nuser: '%.*s'\n"
"adv_host: '%.*s'\nadv_port: '%.*s'\nfull Contact: '%.*s'\n"
"ctid_str: %.*s, ctid_param: %.*s\n",
new_username.len, new_username.s, adv_host->len, adv_host->s,
adv_port->len, adv_port->s, c->uri.len, c->uri.s,
ctid_str.len, ctid_str.s, ctid_param.len, ctid_param.s);
if (ctid_insertion == MR_APPEND_PARAM) {
LM_DBG("param insertion\n");
len1 = snprintf(lump_buf, len,
"<sip:%.*s@%.*s:%.*s;%.*s=%llu%.*s>;expires=%d",
new_username.len, new_username.s,
adv_host->len, adv_host->s, adv_port->len, adv_port->s,
ctid_param.len, ctid_param.s, (unsigned long long)ctid,
extra_ct_params.len, extra_ct_params.s, expires);
} else {
LM_DBG("username insertion\n");
len1 = snprintf(lump_buf, len,
"<sip:%.*s@%.*s:%.*s%.*s>;expires=%d",
new_username.len, new_username.s,
adv_host->len, adv_host->s, adv_port->len, adv_port->s,
extra_ct_params.len, extra_ct_params.s, expires);
}
LM_DBG("final buffer: %.*s\n", len1, lump_buf);
if (len1 < len)
len = len1;
if (insert_new_lump_after(anchor, lump_buf, len, HDR_CONTACT_T) == 0) {
pkg_free(lump_buf);
goto out_err;
}
c = get_next_contact(c);
}
ul.unlock_udomain(mri->dom, &mri->aor);
return 0;
out_err:
ul.unlock_udomain(mri->dom, &mri->aor);
return -1;
}
static int replace_expires_hf(struct sip_msg *msg, int new_expiry)
{
struct lump *lump;
char *p;
int len;
if (!msg->expires || msg->expires->body.len <= 0)
return 1;
LM_DBG("....... Exp hdr: '%.*s'\n",
msg->expires->body.len, msg->expires->body.s);
lump = del_lump(msg, msg->expires->body.s - msg->buf,
msg->expires->body.len, HDR_EXPIRES_T);
if (!lump) {
LM_ERR("fail del_lump on 'Expires:' hf value!\n");
return -1;
}
p = pkg_malloc(11);
if (!p)
return -1;
len = sprintf(p, "%d", new_expiry);
if (!insert_new_lump_after(lump, p, len, HDR_OTHER_T)) {
LM_ERR("fail to insert_new_lump over 'Expires' hf value!\n");
return -1;
}
return 0;
}
int replace_expires_ct_param(struct sip_msg *msg, contact_t *ct, int expires)
{
struct lump *lump;
int len;
char *p;
if (!ct->expires) {
LM_DBG("adding expires, ct '%.*s' with %d, %p -> %p\n",
ct->uri.len, ct->uri.s, expires, msg->buf, msg->buf+msg->len);
lump = anchor_lump(msg, ct->name.s + ct->len - msg->buf, HDR_OTHER_T);
if (!lump) {
LM_ERR("oom\n");
return -1;
}
p = pkg_malloc(20);
if (!p)
return -1;
len = sprintf(p, ";expires=%d", expires);
} else {
LM_DBG("replacing expires, ct '%.*s' '%.*s' with %d, %p -> %p (%p)\n",
ct->uri.len, ct->uri.s, ct->expires->body.len,
ct->expires->body.s, expires, msg->buf, msg->buf+msg->len,
ct->expires->body.s);
lump = del_lump(msg, ct->expires->body.s - msg->buf, ct->expires->body.len,
HDR_EXPIRES_T);
if (!lump) {
LM_ERR("oom\n");
return -1;
}
p = pkg_malloc(11);
if (!p)
return -1;
len = sprintf(p, "%d", expires);
}
if (!insert_new_lump_after(lump, p, len, HDR_OTHER_T)) {
LM_ERR("insert_new_lump_after() failed!\n");
return -1;
}
return 0;
}
static void remove_expires_hf(struct sip_msg *msg)
{
if (msg->expires && msg->expires->body.len > 0) {
LM_DBG("remove Exp hdr: '%.*s'\n",
msg->expires->body.len, msg->expires->body.s);
if (!del_lump(msg, msg->expires->name.s - msg->buf,
msg->expires->len, HDR_EXPIRES_T))
LM_ERR("fail del_lump on 'Expires:' hf value!\n");
}
}
static int replace_expires(contact_t *c, struct sip_msg *msg, int new_expires,
int *skip_exp_header)
{
if (!c->expires || c->expires->body.len <= 0) {
if (*skip_exp_header == 0 && replace_expires_hf(msg, new_expires) == 0)
*skip_exp_header = 1;
} else {
if (replace_expires_ct_param(msg, c, new_expires) != 0) {
LM_ERR("failed to replace contact hf param expires, ci=%.*s\n",
msg->callid->body.len, msg->callid->body.s);
return -1;
}
}
return 0;
}
void overwrite_contact_expirations(struct sip_msg *req, struct mid_reg_info *mri)
{
contact_t *c;
int e, expiry_tick, new_expires;
int skip_exp_header = 0;
for (c = get_first_contact(req); c; c = get_next_contact(c)) {
calc_contact_expires(req, c->expires, &e, 1);
calc_ob_contact_expires(req, c->expires, &expiry_tick, 1);
if (expiry_tick == 0)
new_expires = 0;
else
new_expires = expiry_tick - get_act_time();
LM_DBG("....... contact: '%.*s' Calculated TIMEOUT = %d (%d)\n",
c->len, c->uri.s, expiry_tick, new_expires);
mri->expires = e;
mri->expires_out = new_expires;
if (e != new_expires &&
replace_expires(c, req, new_expires, &skip_exp_header) != 0) {
LM_ERR("failed to replace expires for ct '%.*s'\n",
c->uri.len, c->uri.s);
}
}
}
int dup_req_info(struct sip_msg *req, struct mid_reg_info *mri)
{
contact_t *c;
struct ct_mapping *ctmap;
unsigned int allowed;
str *ua, no_ua = str_init("n/a");
if (parse_headers(req, HDR_USERAGENT_F, 0) != -1 && req->user_agent &&
req->user_agent->body.len > 0 &&
req->user_agent->body.len < UA_MAX_SIZE) {
ua = &req->user_agent->body;
} else {
ua = &no_ua;
}
if (shm_str_sync(&mri->user_agent, ua) != 0) {
LM_ERR("oom\n");
return -1;
}
mri->cflags = getb0flags(req);
if (parse_allow(req) != -1)
allowed = get_allow_methods(req);
else
allowed = ALL_METHODS;
free_ct_mappings(&mri->ct_mappings);
for (c = get_first_contact(req); c; c = get_next_contact(c)) {
ctmap = shm_malloc(sizeof *ctmap);
if (!ctmap) {
LM_ERR("oom\n");
return -1;
}
memset(ctmap, 0, sizeof *ctmap);
if (shm_str_dup(&ctmap->req_ct_uri, &c->uri) != 0) {
LM_ERR("oom\n");
goto err_free;
}
update_act_time();
calc_contact_expires(req, c->expires, &ctmap->expires, 1);
/* q */
if (calc_contact_q(c->q, &ctmap->q) < 0) {
rerrno = R_INV_Q;
LM_ERR("failed to calculate q\n");
goto err_free;
}
/* methods */
if (c->methods) {
if (parse_methods(&c->methods->body, &ctmap->methods) < 0) {
rerrno = R_PARSE;
LM_ERR("failed to parse contact methods\n");
goto err_free;
}
} else {
ctmap->methods = allowed;
}
/* instance */
if (c->instance && shm_str_dup(&ctmap->instance,
&c->instance->body) != 0) {
LM_ERR("oom\n");
goto err_free;
}
/* received */
if (c->received) {
if (shm_str_dup(&ctmap->received, &c->received->body) != 0) {
LM_ERR("oom\n");
goto err_free;
}
}
list_add_tail(&ctmap->list, &mri->ct_mappings);
}
return 0;
err_free:
shm_free(ctmap->req_ct_uri.s);
shm_free(ctmap->instance.s);
shm_free(ctmap);
return -1;
}
void mid_reg_reply_fcaps(struct cell *_, int __, struct tmcb_params *params)
{
pn_append_rpl_fcaps(params->rpl);
}
/* called exactly once per outgoing branch */
void mid_reg_req_fwded(struct cell *_, int __, struct tmcb_params *params)
{
struct sip_msg *req = params->req;
struct mid_reg_info *mri = *(struct mid_reg_info **)(params->param);
str *next_hop = NULL;
lock_start_write(mri->tm_lock);
mri->pending_replies++;
if (parse_reg_headers(req) != 0) {
LM_ERR("failed to parse req headers\n");
goto out;
}
if (req->expires)
LM_DBG("msg expires: '%.*s'\n", req->expires->body.len, req->expires->body.s);
if (shm_str_sync(&mri->main_reg_uri, GET_RURI(req)) != 0) {
LM_ERR("oom\n");
goto out;
}
if (GET_RURI(req) != GET_NEXT_HOP(req))
next_hop = GET_NEXT_HOP(req);
if (shm_str_sync(&mri->main_reg_next_hop, next_hop) != 0) {
LM_ERR("oom\n");
goto out;
}
if (mri->star)
goto out;
if (reg_mode != MID_REG_MIRROR)
overwrite_contact_expirations(req, mri);
if (reg_mode == MID_REG_THROTTLE_AOR) {
LM_DBG("trimming all Contact URIs into one...\n");
if (trim_to_single_contact(req, &mri->aor)) {
LM_ERR("failed to overwrite Contact URI\n");
goto out;
}
}
/* TODO: the TMCB_RESPONSE_IN callback provides the initial request as an
* SHM'ized struct sip_msg, and does not proceed to free any PKG structures
* resulted when parse_headers() operations are performed on it during the
* callback, leading to PKG memory leaks.
*
* The current workaround is to dup any info we need from the request
* earliest, before sending out the request and almost ignore the
* un-parsable "req" sip_msg provided during TMCB_RESPONSE_IN.
*/
if (dup_req_info(req, mri) != 0) {
LM_ERR("oom\n");
goto out;
}
if (reg_mode == MID_REG_MIRROR || reg_mode == MID_REG_THROTTLE_CT) {
LM_DBG("fixing Contact URI ...\n");
if (overwrite_req_contacts(req, mri)) {
LM_ERR("failed to overwrite Contact URIs\n");
goto out;
}
}
out:
if (pn_enable) {
pn_append_req_fcaps(req, &mri->pn_provider_state);
if (mri->pn_provider_state && tmb.register_tmcb(req, NULL,
TMCB_RESPONSE_FWDED, mid_reg_reply_fcaps, mri, NULL) <= 0)
LM_ERR("failed to register Feature-Caps on-reply callback\n");
}
LM_DBG("REQ FORWARDED TO '%.*s' (obp: %.*s), expires=%d\n",
mri->main_reg_uri.len, mri->main_reg_uri.s,
mri->main_reg_next_hop.len, mri->main_reg_next_hop.s,
mri->expires_out);
lock_stop_write(mri->tm_lock);
}
static inline unsigned int calc_buf_len(ucontact_t* c,int build_gruu,
struct sip_msg *_m)
{
unsigned int len;
int qlen;
struct socket_info *sock;
len = 0;
while(c) {
if (VALID_CONTACT(c, get_act_time())) {
if (len) len += CONTACT_SEP_LEN;
len += 2 /* < > */ + c->c.len;
qlen = len_q(c->q);
if (qlen) len += Q_PARAM_LEN + qlen;
len += EXPIRES_PARAM_LEN + INT2STR_MAX_LEN;
if (c->received.s) {
len += 1 /* ; */
+ rcv_param.len
+ 1 /* = */
+ 1 /* dquote */
+ c->received.len
+ 1 /* dquote */
;
}
if (build_gruu && c->instance.s) {
sock = (c->sock)?(c->sock):(_m->rcv.bind_address);
/* pub gruu */
len += PUB_GRUU_SIZE
+ 1 /* quote */
+ SIP_PROTO_SIZE
+ c->aor->len
+ (reg_use_domain ?0:(1 /* @ */ + sock->name.len + 1 /* : */ + sock->port_no_str.len))
+ GR_PARAM_SIZE
+ (c->instance.len - 2)
+ 1 /* quote */
;
/* temp gruu */
len += TEMP_GRUU_SIZE
+ 1 /* quote */
+ SIP_PROTO_SIZE
+ TEMP_GRUU_HEADER_SIZE
+ calc_temp_gruu_len(c->aor,&c->instance,&c->callid)
+ 1 /* @ */
+ sock->name.len
+ 1 /* : */
+ sock->port_no_str.len
+ GR_NO_VAL_SIZE
+ 1 /* quote */
;
/* sip.instance */
len += SIP_INSTANCE_SIZE
+ 1 /* quote */
+ (c->instance.len - 2)
+ 1 /* quote */
;
}
}
c = c->next;
}
if (len) len += CONTACT_BEGIN_LEN + CRLF_LEN;
return len;
}
int build_contact(ucontact_t* c,struct sip_msg *_m)
{
char *p, *cp, *tmpgr;
int fl, len,grlen;
int build_gruu = 0;
struct socket_info *sock;
LM_DBG("building contact ...\n");
if (!disable_gruu && _m->supported && parse_supported(_m) == 0 &&
(get_supported(_m) & F_SUPPORTED_GRUU))
build_gruu=1;
contact.data_len = calc_buf_len(c,build_gruu,_m);
if (!contact.data_len) return 0;
if (!contact.buf || (contact.buf_len < contact.data_len)) {
if (contact.buf) pkg_free(contact.buf);
contact.buf = (char*)pkg_malloc(contact.data_len);
if (!contact.buf) {
contact.data_len = 0;
contact.buf_len = 0;
LM_ERR("no pkg memory left\n");
return -1;
} else {
contact.buf_len = contact.data_len;
}
}
p = contact.buf;
memcpy(p, CONTACT_BEGIN, CONTACT_BEGIN_LEN);
p += CONTACT_BEGIN_LEN;
fl = 0;
while(c) {
if (VALID_CONTACT(c, get_act_time())) {
if (fl) {
memcpy(p, CONTACT_SEP, CONTACT_SEP_LEN);
p += CONTACT_SEP_LEN;
} else {
fl = 1;
}
*p++ = '<';
memcpy(p, c->c.s, c->c.len);
p += c->c.len;
*p++ = '>';
len = len_q(c->q);
if (len) {
memcpy(p, Q_PARAM, Q_PARAM_LEN);
p += Q_PARAM_LEN;
memcpy(p, q2str(c->q, 0), len);
p += len;
}
memcpy(p, EXPIRES_PARAM, EXPIRES_PARAM_LEN);
p += EXPIRES_PARAM_LEN;
cp = int2str((int)(c->expires - get_act_time()), &len);
memcpy(p, cp, len);
p += len;
if (c->received.s) {
*p++ = ';';
memcpy(p, rcv_param.s, rcv_param.len);
p += rcv_param.len;
*p++ = '=';
*p++ = '\"';
memcpy(p, c->received.s, c->received.len);
p += c->received.len;
*p++ = '\"';
}
if (build_gruu && c->instance.s) {
sock = (c->sock)?(c->sock):(_m->rcv.bind_address);
/* build pub GRUU */
memcpy(p,PUB_GRUU,PUB_GRUU_SIZE);
p += PUB_GRUU_SIZE;
*p++ = '\"';
memcpy(p,SIP_PROTO,SIP_PROTO_SIZE);
p += SIP_PROTO_SIZE;
memcpy(p,c->aor->s,c->aor->len);
p += c->aor->len;
if (!reg_use_domain) {
*p++ = '@';
memcpy(p,sock->name.s,sock->name.len);
p += sock->name.len;
*p++ = ':';
memcpy(p,sock->port_no_str.s,sock->port_no_str.len);
p += sock->port_no_str.len;
}
memcpy(p,GR_PARAM,GR_PARAM_SIZE);
p += GR_PARAM_SIZE;
memcpy(p,c->instance.s+1,c->instance.len-2);
p += c->instance.len-2;
*p++ = '\"';
/* build temp GRUU */
memcpy(p,TEMP_GRUU,TEMP_GRUU_SIZE);
p += TEMP_GRUU_SIZE;
*p++ = '\"';
memcpy(p,SIP_PROTO,SIP_PROTO_SIZE);
p += SIP_PROTO_SIZE;
memcpy(p,TEMP_GRUU_HEADER,TEMP_GRUU_HEADER_SIZE);
p += TEMP_GRUU_HEADER_SIZE;
tmpgr = build_temp_gruu(c->aor,&c->instance,&c->callid,&grlen);
base64encode((unsigned char *)p,
(unsigned char *)tmpgr,grlen);
p += calc_temp_gruu_len(c->aor,&c->instance,&c->callid);
*p++ = '@';
memcpy(p,sock->name.s,sock->name.len);
p += sock->name.len;
*p++ = ':';
memcpy(p,sock->port_no_str.s,sock->port_no_str.len);
p += sock->port_no_str.len;
memcpy(p,GR_NO_VAL,GR_NO_VAL_SIZE);
p += GR_NO_VAL_SIZE;
*p++ = '\"';
/* build +sip.instance */
memcpy(p,SIP_INSTANCE,SIP_INSTANCE_SIZE);
p += SIP_INSTANCE_SIZE;
*p++ = '\"';
memcpy(p,c->instance.s+1,c->instance.len-2);
p += c->instance.len-2;
*p++ = '\"';
}
}
c = c->next;
}
memcpy(p, CRLF, CRLF_LEN);
p += CRLF_LEN;
contact.data_len = p - contact.buf;
LM_DBG("created Contact HF: %.*s\n", contact.data_len, contact.buf);
return 0;
}
static contact_t *match_contact(ucontact_id ctid, struct sip_msg *msg)
{
contact_t *c;
struct sip_uri puri;
str ctid_str;
int idx;
ctid_str.s = int2str(ctid, &ctid_str.len);
for (c = get_first_contact2(msg); c; c = get_next_contact2(c)) {
LM_DBG("it='%.*s'\n", c->uri.len, c->uri.s);
if (parse_uri(c->uri.s, c->uri.len, &puri) < 0) {
LM_ERR("failed to parse reply contact uri <%.*s>\n",
c->uri.len, c->uri.s);
return NULL;
}
/* try to match the request Contact with a Contact from the reply */
if (ctid_insertion == MR_APPEND_PARAM) {
idx = get_uri_param_idx(&ctid_param, &puri);
if (idx < 0) {
LM_DBG("failed to locate our ';%.*s=' param, ci = %.*s!\n",
ctid_param.len, ctid_param.s,
msg->callid->body.len, msg->callid->body.s);
continue;
}
if (str_match(&ctid_str, &puri.u_val[idx]))
return c;
} else {
if (str_match(&ctid_str, &puri.user))
return c;
}
}
return NULL;
}
/**
* Ensures that a given @msg includes all registering contact usernames from
* the @ct_mappings list.
*/
static int validate_msg_contacts(struct sip_msg *msg,
struct list_head *ct_mappings)
{
struct ct_mapping *ctmap;
struct list_head *_;
list_for_each(_, ct_mappings) {
ctmap = list_entry(_, struct ct_mapping, list);
if (!ctmap->zero_expires && !match_contact(ctmap->ctid, msg))
return -1;
}
return 0;
}
int append_contacts(ucontact_t *contacts, struct sip_msg *msg)
{
struct lump *anchor;
char *buf;
int len;
build_contact(contacts, msg);
buf = pkg_malloc(contact.data_len + 1);
if (!buf) {
LM_ERR("oom\n");
return -1;
}
anchor = anchor_lump(msg, msg->unparsed - msg->buf, 0);
if (!anchor) {
pkg_free(buf);