/**
* Check, if a user-agent follows the indicated service-routes
*/
int check_service_routes(struct sip_msg* _m, udomain_t* _d) {
struct sip_uri uri;
int i;
struct hdr_field *hdr;
rr_t *r;
pcontact_t * c = getContactP(_m, _d);
/* Contact not found => not following service-routes */
if (c == NULL) return -1;
/* Search for the first Route-Header: */
if (find_first_route(_m) < 0) return -1;
LM_DBG("Got %i Route-Headers.\n", c->num_service_routes);
/* Lock this record while working with the data: */
ul.lock_udomain(_d, &c->aor);
/* Check the route-set: */
if (_m->route) {
hdr = _m->route;
LM_DBG("hdr is %p\n", hdr);
/* Check, if the first host is ourself: */
r = (rr_t*)hdr->parsed;
if (r) {
LM_DBG("Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
/* Skip first headers containing myself: */
while (parse_uri(r->nameaddr.uri.s, r->nameaddr.uri.len, &uri) == 0
&& check_self(&uri.host,uri.port_no?uri.port_no:SIP_PORT,0)) {
LM_DBG("Self\n");
/* Check for more headers and fail, if it was the last one
Check, if service-routes are indicated.
If yes, request is not following service-routes */
if (find_next_route(_m, &hdr) != 0) r = NULL;
else r = (rr_t*)hdr->parsed;
if (!r && (c->num_service_routes > 0)) {
LM_DBG("Not enough route-headers in Message\n");
goto error;
}
LM_DBG("hdr is %p\n", hdr);
LM_DBG("r is %p\n", r);
if (r)
LM_ERR("Next Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
}
/* Then check the following headers: */
for (i=0; i< c->num_service_routes; i++) {
LM_DBG("Route must be: %.*s\n", c->service_routes[i].len, c->service_routes[i].s);
/* No more Route-Headers? Not following service-routes */
if (!r) {
LM_ERR("No more route headers in message.\n");
goto error;
}
LM_DBG("Route is: %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
/* Check length: */
if (r->nameaddr.uri.len != c->service_routes[i].len) {
LM_DBG("Length does not match.\n");
goto error;
}
/* Check contents: */
if (strncasecmp(r->nameaddr.uri.s, c->service_routes[i].s, c->service_routes[i].len) != 0) {
LM_DBG("String comparison failed.\n");
goto error;
}
if (find_next_route(_m, &hdr) != 0) r = NULL;
else r = (rr_t*)hdr->parsed;
}
/* Check, if it was the last route-header in the message: */
if (r) {
LM_ERR("Too many route headers in message.\n");
goto error;
}
} else {
LM_WARN("Strange: Route-Header is present, but not parsed?!?");
if (c->num_service_routes > 0) goto error;
}
} else {
LM_ERR("No route header in Message.\n");
/* No route-header? Check, if service-routes are indicated.
If yes, request is not following service-routes */
if (c->num_service_routes > 0) goto error;
}
/* Unlock domain */
ul.unlock_udomain(_d, &c->aor);
return 1;
error:
/* Unlock domain */
ul.unlock_udomain(_d, &c->aor);
return -1;
}
/*
* Get next hop using the first Route not generated by this proxy or URI from the Request-Line
* param msg SIP message
* param nexthop Next hop IP
* param bufsize Size of nexthop
* return 0 success, -1 failure
*/
int ospGetNextHop(
struct sip_msg* msg,
char* nexthop,
int bufsize)
{
struct hdr_field* hf;
struct sip_uri uri;
rr_t* rt;
int found = 0;
int result = -1;
if (bufsize > 0) {
result = 0;
for (hf = msg->headers; hf; hf = hf->next) {
if (hf->type == HDR_ROUTE_T) {
for (rt = (rr_t*)hf->parsed; rt; rt = rt->next) {
if (parse_uri(rt->nameaddr.uri.s, rt->nameaddr.uri.len, &uri) == 0) {
LM_DBG("host '%.*s' port '%d'\n", uri.host.len, uri.host.s, uri.port_no);
if (check_self(&uri.host, uri.port_no ? uri.port_no : SIP_PORT, PROTO_NONE) != 1) {
LM_DBG("it is NOT me, FOUND!\n");
if (uri.port_no != 0) {
snprintf(nexthop, bufsize, "%.*s:%d", uri.host.len, uri.host.s, uri.port_no);
nexthop[bufsize - 1] = '\0';
} else {
ospCopyStrToBuffer(&uri.host, nexthop, bufsize);
}
found = 1;
break;
} else {
LM_DBG("it IS me, keep looking\n");
}
} else {
LM_ERR("failed to parse route uri '%.*s'\n",
rt->nameaddr.uri.len,
rt->nameaddr.uri.s);
}
}
if (found == 1) {
break;
}
}
}
if (!found) {
LM_DBG("using the Request-Line instead host '%.*s' port '%d'\n",
msg->parsed_uri.host.len,
msg->parsed_uri.host.s,
msg->parsed_uri.port_no);
if (msg->parsed_uri.port_no != 0) {
snprintf(nexthop, bufsize, "%.*s:%d", msg->parsed_uri.host.len, msg->parsed_uri.host.s, msg->parsed_uri.port_no);
nexthop[bufsize - 1] = '\0';
} else {
ospCopyStrToBuffer(&msg->parsed_uri.host, nexthop, bufsize);
}
found = 1;
}
}
return result;
}
/* removes first via & sends msg to the second
* - mode param controls if modules sip response callbacks are executed */
static int do_forward_reply(struct sip_msg* msg, int mode)
{
char* new_buf;
struct dest_info dst;
unsigned int new_len;
int r;
#ifdef USE_TCP
char* s;
int len;
#endif
init_dest_info(&dst);
new_buf=0;
/*check if first via host = us */
if (check_via){
if (check_self(&msg->via1->host,
msg->via1->port?msg->via1->port:SIP_PORT,
msg->via1->proto)!=1){
LOG(L_NOTICE, "ERROR: forward_reply: host in first via!=me :"
" %.*s:%d\n", msg->via1->host.len, msg->via1->host.s,
msg->via1->port);
/* send error msg back? */
goto error;
}
}
/* check modules response_f functions */
if(likely(mode==0)) {
for (r=0; r<mod_response_cbk_no; r++)
if (mod_response_cbks[r](msg)==0) goto skip;
}
/* we have to forward the reply stateless, so we need second via -bogdan*/
if (parse_headers( msg, HDR_VIA2_F, 0 )==-1
|| (msg->via2==0) || (msg->via2->error!=PARSE_OK))
{
/* no second via => error */
LOG(L_DBG, "reply cannot be forwarded - no 2nd via\n");
goto error;
}
new_buf = build_res_buf_from_sip_res( msg, &new_len);
if (!new_buf){
LOG(L_ERR, "ERROR: forward_reply: building failed\n");
goto error;
}
dst.proto=msg->via2->proto;
SND_FLAGS_OR(&dst.send_flags, &msg->fwd_send_flags, &msg->rpl_send_flags);
if (update_sock_struct_from_via( &dst.to, msg, msg->via2 )==-1) goto error;
#ifdef USE_COMP
dst.comp=msg->via2->comp_no;
#endif
#if defined USE_TCP || defined USE_SCTP
if (
#ifdef USE_TCP
dst.proto==PROTO_TCP
|| dst.proto==PROTO_WS
#ifdef USE_TLS
|| dst.proto==PROTO_TLS
|| dst.proto==PROTO_WSS
#endif
#ifdef USE_SCTP
||
#endif /* USE_SCTP */
#endif /* USE_TCP */
#ifdef USE_SCTP
dst.proto==PROTO_SCTP
#endif /* USE_SCTP */
){
/* find id in i param if it exists */
if (msg->via1->i && msg->via1->i->value.s){
s=msg->via1->i->value.s;
len=msg->via1->i->value.len;
DBG("forward_reply: i=%.*s\n",len, ZSW(s));
if (reverse_hex2int(s, len, (unsigned int*)&dst.id)<0){
LOG(L_ERR, "ERROR: forward_reply: bad via i param \"%.*s\"\n",
len, ZSW(s));
dst.id=0;
}
}
}
#endif
apply_force_send_socket(&dst, msg);
if (msg_send(&dst, new_buf, new_len)<0)
{
STATS_RPL_FWD_DROP();
goto error;
}
#ifdef STATS
STATS_TX_RESPONSE( (msg->first_line.u.reply.statuscode/100) );
#endif
DBG(" reply forwarded to %.*s:%d\n",
msg->via2->host.len, msg->via2->host.s,
(unsigned short) msg->via2->port);
STATS_RPL_FWD_OK();
pkg_free(new_buf);
skip:
return 0;
error:
if (new_buf) pkg_free(new_buf);
return -1;
}
static int l_siplua_getRoute(lua_State *L)
{
struct sipapi_object *o;
rr_t *rt;
str uri;
struct sip_uri puri;
int n = 1;
o = luaL_checkudata(L, 1, "siplua.api");
if (parse_headers(o->msg, HDR_ROUTE_F, 0) == -1)
return luaL_error(L, "failed to parse headers");
if (!o->msg->route)
{
lua_pushnil(L);
return 1;
}
if (parse_rr(o->msg->route) < 0)
return luaL_error(L, "failed to parse route HF");
lua_newtable(L);
for (rt = (rr_t *)o->msg->route->parsed; rt; rt = rt->next )
{
uri = rt->nameaddr.uri;
lua_pushinteger(L, n++);
lua_newtable(L);
lua_pushliteral(L, "uri");
lua_pushlstring(L, uri.s, uri.len);
lua_rawset(L, -3);
if (parse_uri(uri.s, uri.len, &puri) < 0)
{
if (n == 1)
return luaL_error(L, "failed to parse the first route URI");
continue;
}
lua_pushliteral(L, "user");
lua_pushlstring(L, puri.user.s, puri.user.len);
lua_rawset(L, -3);
lua_pushliteral(L, "host");
lua_pushlstring(L, puri.host.s, puri.host.len);
lua_rawset(L, -3);
lua_pushliteral(L, "port");
lua_pushinteger(L, puri.port_no);
lua_rawset(L, -3);
lua_pushliteral(L, "params");
lua_pushlstring(L, puri.params.s, puri.params.len);
lua_rawset(L, -3);
lua_pushliteral(L, "lr");
lua_pushlstring(L, puri.lr.s, puri.lr.len);
lua_rawset(L, -3);
lua_pushliteral(L, "lr_val");
lua_pushlstring(L, puri.lr_val.s, puri.lr_val.len);
lua_rawset(L, -3);
lua_pushliteral(L, "r2");
lua_pushlstring(L, puri.r2.s, puri.r2.len);
lua_rawset(L, -3);
lua_pushliteral(L, "r2_val");
lua_pushlstring(L, puri.r2_val.s, puri.r2_val.len);
lua_rawset(L, -3);
lua_pushliteral(L, "is_myself");
if (check_self(&puri.host, puri.port_no ? puri.port_no : SIP_PORT, 0) >= 0)
lua_pushboolean(L, 1);
else
lua_pushboolean(L, 0);
lua_rawset(L, -3);
lua_rawset(L, -3);
}
return 1;
}
/*! \brief removes first via & sends msg to the second */
int forward_reply(struct sip_msg* msg)
{
char* new_buf;
union sockaddr_union* to;
unsigned int new_len;
struct sr_module *mod;
int proto;
int id; /* used only by tcp*/
struct socket_info *send_sock;
char* s;
int len;
to=0;
id=0;
new_buf=0;
/*check if first via host = us */
if (check_via){
if (check_self(&msg->via1->host,
msg->via1->port?msg->via1->port:SIP_PORT,
msg->via1->proto)!=1){
LM_ERR("host in first via!=me : %.*s:%d\n",
msg->via1->host.len, msg->via1->host.s, msg->via1->port);
/* send error msg back? */
goto error;
}
}
/* quick hack, slower for multiple modules*/
for (mod=modules;mod;mod=mod->next){
if ((mod->exports) && (mod->exports->response_f)){
LM_DBG("found module %s, passing reply to it\n",
mod->exports->name);
if (mod->exports->response_f(msg)==0) goto skip;
}
}
/* if stateless fwd was disabled, we cannot have stateless replies here*/
if (sl_fwd_disabled)
goto skip;
/* we have to forward the reply stateless, so we need second via -bogdan*/
if (parse_headers( msg, HDR_VIA2_F, 0 )==-1
|| (msg->via2==0) || (msg->via2->error!=PARSE_OK))
{
/* no second via => error */
LM_ERR("no 2nd via found in reply\n");
goto error;
}
to=(union sockaddr_union*)pkg_malloc(sizeof(union sockaddr_union));
if (to==0){
LM_ERR("out of pkg memory\n");
goto error;
}
proto=msg->via2->proto;
if (update_sock_struct_from_via( to, msg, msg->via2 )==-1) goto error;
if (is_tcp_based_proto(proto)){
/* find id in i param if it exists */
if (msg->via1->i&&msg->via1->i->value.s){
s=msg->via1->i->value.s;
len=msg->via1->i->value.len;
id=reverse_hex2int(s, len);
}
}
send_sock = get_send_socket(msg, to, proto);
new_buf = build_res_buf_from_sip_res( msg, &new_len, send_sock,0);
if (!new_buf){
LM_ERR("failed to build rpl from req failed\n");
goto error;
}
if (msg_send(send_sock, proto, to, id, new_buf, new_len, msg)<0) {
update_stat( drp_rpls, 1);
goto error0;
}
update_stat( fwd_rpls, 1);
/*
* If no port is specified in the second via, then this
* message output a wrong port number - zero. Despite that
* the correct port is choosen in update_sock_struct_from_via,
* as its visible with su_getport(to); .
*/
LM_DBG("reply forwarded to %.*s:%d\n", msg->via2->host.len,
msg->via2->host.s, (unsigned short) msg->via2->port);
pkg_free(new_buf);
pkg_free(to);
skip:
return 0;
error:
update_stat( err_rpls, 1);
error0:
if (new_buf) pkg_free(new_buf);
if (to) pkg_free(to);
return -1;
}
int send_resource_subs(char* uri, void* param)
{
str pres_uri, *tmp_str;
struct sip_uri parsed_pres_uri;
int duplicate = 0;
str *normalized_uri;
subs_info_t *s = (subs_info_t *) ((void**)param)[0];
list_entry_t **rls_contact_list = (list_entry_t **) ((void**)param)[1];
pres_uri.s = uri;
pres_uri.len = strlen(uri);
normalized_uri = normalize_sip_uri(&pres_uri);
if (normalized_uri->s == NULL || normalized_uri->len == 0) {
LM_ERR("failed to normalize RLS entry URI %.*s\n",
pres_uri.len, pres_uri.s);
return -1;
}
if (parse_uri(normalized_uri->s, normalized_uri->len, &parsed_pres_uri)
< 0) {
LM_ERR("bad uri: %.*s\n", normalized_uri->len, normalized_uri->s);
return -1;
}
if (check_self(&parsed_pres_uri.host, 0, PROTO_NONE) != 1
&& rls_disable_remote_presence != 0)
{
LM_WARN("Unable to subscribe to remote contact %.*s for watcher %.*s\n",
normalized_uri->len, normalized_uri->s,
s->watcher_uri->len,
s->watcher_uri->s);
return 1;
}
/* Silently drop subscribes over the limit - will print a single warning
* later */
if (rls_max_backend_subs > 0 && ++counter > rls_max_backend_subs)
return 1;
s->pres_uri = normalized_uri;
s->remote_target = normalized_uri;
/* Build list of contacts... checking each contact exists only once */
if ((tmp_str = (str *)pkg_malloc(sizeof(str))) == NULL)
{
LM_ERR("out of private memory\n");
return -1;
}
if ((tmp_str->s = (char *)pkg_malloc(sizeof(char) * pres_uri.len)) == NULL)
{
pkg_free(tmp_str);
LM_ERR("out of private memory\n");
return -1;
}
memcpy(tmp_str->s, normalized_uri->s, normalized_uri->len);
tmp_str->len = normalized_uri->len;
*rls_contact_list = list_insert(tmp_str, *rls_contact_list, &duplicate);
if (duplicate != 0)
{
LM_WARN("%.*s has %.*s multiple times in the same resource list\n",
s->watcher_uri->len, s->watcher_uri->s,
s->pres_uri->len, s->pres_uri->s);
pkg_free(tmp_str->s);
pkg_free(tmp_str);
return 1;
}
return pua_send_subscribe(s);
}
/**
* Check, if a user-agent follows the indicated service-routes
*/
int check_service_routes(struct sip_msg* _m, udomain_t* _d) {
struct sip_uri uri;
int i;
struct hdr_field *hdr;
rr_t *r;
char routes[MAXROUTES][MAXROUTESIZE];
unsigned int num_routes = 0;
struct via_body * vb;
unsigned short port;
unsigned short proto;
/* Contact not found => not following service-routes */
// if (c == NULL) return -1;
/* Search for the first Route-Header: */
if (find_first_route(_m) < 0) return -1;
// LM_DBG("Got %i Route-Headers.\n", c->num_service_routes);
vb = cscf_get_ue_via(_m);
port = vb->port?vb->port:5060;
proto = vb->proto;
/* Lock this record while working with the data: */
ul.lock_udomain(_d, &vb->host, port, proto);
if (_m->route) {
hdr = _m->route;
r = (rr_t*)hdr->parsed;
//get rid of ourselves from route header
if (r) {
LM_DBG("Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
while (r && (parse_uri(r->nameaddr.uri.s, r->nameaddr.uri.len, &uri) == 0)
&& check_self(&uri.host,uri.port_no?uri.port_no:SIP_PORT,0)) {
LM_DBG("Self\n");
/* Check for more headers and fail, if it was the last one
Check, if service-routes are indicated.
If yes, request is not following service-routes */
if (find_next_route(_m, &hdr) != 0)
r = NULL;
else
r = (rr_t*)hdr->parsed;
LM_DBG("hdr is %p\n", hdr);
LM_DBG("r is %p\n", r);
if (r)
LM_DBG("Next Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
}
int i = 0;
while (r) {
memset(routes[i],0,MAXROUTESIZE);
memcpy(routes[i], r->nameaddr.uri.s, r->nameaddr.uri.len);
if (find_next_route(_m, &hdr) != 0)
r = NULL;
else
r = (rr_t*)hdr->parsed;
i += 1;
num_routes += 1;
}
LM_DBG("num_routes is %d\n", num_routes);
for (i=0; i<num_routes; i++) {
LM_DBG("route %d for checking is %s\n", i, routes[i]);
}
pcontact_t * c = getContactP(_m, _d, PCONTACT_REGISTERED, routes, num_routes);
if (!c) {
LM_DBG("no contact found in usrloc when checking for service route\n");
goto error;
}
LM_DBG("we have a contact which satisifes the routes...\n");
ul.unlock_udomain(_d, &vb->host, port, proto);
return 1;
}
} else {
LM_DBG("Request doesn't have any route headers to check service-route...ignoring\n");
goto error;
}
pcontact_t * c = getContactP(_m, _d, PCONTACT_REGISTERED, 0, 0);
if (!c) {
LM_DBG("no contact found in usrloc when checking for service route\n");
goto error;
}
/* Check the route-set: */
if (_m->route) {
hdr = _m->route;
LM_DBG("hdr is %p\n", hdr);
/* Check, if the first host is ourself: */
r = (rr_t*)hdr->parsed;
if (r) {
LM_DBG("Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
/* Skip first headers containing myself: */
while (r && (parse_uri(r->nameaddr.uri.s, r->nameaddr.uri.len, &uri) == 0)
&& check_self(&uri.host,uri.port_no?uri.port_no:SIP_PORT,0)) {
LM_DBG("Self\n");
/* Check for more headers and fail, if it was the last one
Check, if service-routes are indicated.
If yes, request is not following service-routes */
if (find_next_route(_m, &hdr) != 0) r = NULL;
else r = (rr_t*)hdr->parsed;
if (!r && (c->num_service_routes > 0)) {
LM_DBG("Not enough route-headers in Message\n");
goto error;
}
LM_DBG("hdr is %p\n", hdr);
LM_DBG("r is %p\n", r);
if (r)
LM_DBG("Next Route is %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
}
LM_DBG("We have %d service-routes\n", c->num_service_routes);
/* Then check the following headers: */
for (i=0; i< c->num_service_routes; i++) {
LM_DBG("Route must be: %.*s\n", c->service_routes[i].len, c->service_routes[i].s);
/* No more Route-Headers? Not following service-routes */
if (!r) {
LM_DBG("No more route headers in message.\n");
goto error;
}
LM_DBG("Route is: %.*s\n", r->nameaddr.uri.len, r->nameaddr.uri.s);
/* Check length: */
if (r->nameaddr.uri.len != c->service_routes[i].len) {
LM_DBG("Length does not match.\n");
goto error;
}
/* Check contents: */
if (strncasecmp(r->nameaddr.uri.s, c->service_routes[i].s, c->service_routes[i].len) != 0) {
LM_DBG("String comparison failed.\n");
goto error;
}
if (find_next_route(_m, &hdr) != 0) r = NULL;
else r = (rr_t*)hdr->parsed;
}
/* Check, if it was the last route-header in the message: */
if (r) {
LM_DBG("Too many route headers in message.\n");
goto error;
}
} else {
LM_WARN("Strange: Route-Header is present, but not parsed?!?");
if (c->num_service_routes > 0) goto error;
}
} else {
LM_DBG("No route header in Message.\n");
/* No route-header? Check, if service-routes are indicated.
If yes, request is not following service-routes */
if (c->num_service_routes > 0) goto error;
}
/* Unlock domain */
ul.unlock_udomain(_d, &vb->host, port, proto);
return 1;
error:
/* Unlock domain */
ul.unlock_udomain(_d, &vb->host, port, proto);
return -1;
}
