2008/11/20 Maxim Sobolev <[EMAIL PROTECTED]>:
> Joan wrote:
>> Hello, I've been trying to setup a testing scenario to offer voip services.
>> At this point I've a phone behind a nat, and I am trying to
>> communicate to the openser, that in turns forwards the calls to an
>> asterisk server.
>> Before nating the phone and starting with the rtpproxy everything was
>> working properly.
>> The current scenario would be:
>> IP Phone (192.168.2.50) -> NAT server masking as 192.168.253.12)
>> -> Kamailio (192.168.253.98) -> Asterisk (192.168.253.2)
>>
>> The working scenario was:
>> IP Phone 192.168.253.25 -> Kamailio (192.168.253.98) -> Asterisk
>> (192.168.253.2)
>>
>> I've configured everthing in kamailio as the examples I saw, but I
>> suspect there's something wrong with my rtpproxy (I'm using
>> rtpproxy-1.2.alpha.20081104)
>> The fact is that when I sniff the traffic in localhost, having started
>> rtpproxy as "rtpproxy -s udp:localhost 15000 -f -u openser -l
>> 192.168.253.98 &"
>>
>> ###################################################################################
>> test:~# ngrep -lqtt -W byline port 15000 -d lo
>> interface: lo (127.0.0.0/255.0.0.0)
>> filter: (ip or ip6) and ( port 15000 )
>>
>> U 2008/11/20 16:46:13.466299 127.0.0.1:59654 -> 127.0.0.1:15000
>> 19694_4 L [EMAIL PROTECTED] 192.168.253.2 17790
>> 4e178bc90eb3861o0;1 as64b2e8a6;1
>>
>> U 2008/11/20 16:46:13.466376 127.0.0.1:15000 -> 127.0.0.1:59654
>> 19694_4 0 192.168.253.98
>> ###################################################################################
>>
>> I see that rtpproxy is returning 0 to the openser doesn't like it and
>> it says "ERROR:nathelper:force_rtp_proxy2_f: incorrect port 0 in reply
>> from rtp proxy"
>>
>> Do i have a broken rtpproxy, or it's a matter of configuration?
>
> Joan,
>
> It looks like misconfiguration to me, can you please send your
> openser.cfg config?
>
This is basically most of the config ...
This is the original config from kamailio adapted to work with db +
some nat detection/correction
# -- nathelper
modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:15000")
####### Routing Logic ########
# main request routing logic
route{
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
}
if (has_totag()) {
# sequential request withing a dialog should
# take the path determined by record-routing
if (loose_route()) {
if (is_method("BYE")) {
log(1, "MIS: Allibero el proxy \n");
unforce_rtp_proxy();
setflag(1); # do accouting ...
setflag(3); # ... even if the transaction fails
}
route(1);
} else {
if ( is_method("ACK") ) {
if ( t_check_trans() ) {
# non loose-route, but stateful ACK;
must be an ACK after a 487
or e.g. 404 from upstream server
t_relay();
exit;
} else {
# ACK without matching transaction ...
ignore and discard.\n");
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
#initial requests
# CANCEL processing
if (is_method("CANCEL"))
{
#Freeing proxy
unforce_rtp_proxy();
if (t_check_trans())
t_relay();
exit;
}
t_check_trans();
# authenticate if from local subscriber (uncomment to enable auth)
if (!(method=="REGISTER") && from_uri==myself)
{
if (!proxy_authorize("", "subscriber")) {
proxy_challenge("", "0");
exit;
}
if (!check_from()) {
sl_send_reply("403","Forbidden auth ID");
exit;
}
consume_credentials();
# caller authenticated
}
# record routing
if (!is_method("REGISTER|MESSAGE"))
record_route();
# account only INVITEs
if (is_method("INVITE")) {
setflag(1); # do accouting
if (uri =~ "sip:[EMAIL PROTECTED]")
{
rewritehost("192.168.253.2");
log(1, "MIS: Redirecting call to internal asterisk \n");
route(1);
return;
}
}
if (!is_uri_host_local())
{
append_hf("P-hint: outbound\r\n");
# if you have some interdomain connections via TLS
##if($rd=="tls_domain1.net") {
## t_relay("tls:domain1.net");
## exit;
##} else if($rd=="tls_domain2.net") {
## t_relay("tls:domain2.net");
## exit;
##}
route(1);
}
# requests for my domain
if (is_method("PUBLISH"))
{
sl_send_reply("503", "Service Unavailable");
exit;
}
if (is_method("REGISTER"))
{
# authenticate the REGISTER requests (uncomment to enable auth)
if (!www_authorize("", "subscriber"))
{
www_challenge("", "0");
exit;
}
if (!check_to())
{
sl_send_reply("403","Forbidden auth ID");
exit;
}
if (!save("location"))
sl_reply_error();
exit;
}
if ($rU==NULL) {
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
# apply DB based aliases (uncomment to enable)
alias_db_lookup("dbaliases");
if (!lookup("location")) {
switch ($retcode) {
case -1:
case -3:
t_newtran();
t_reply("404", "Not Found");
exit;
case -2:
sl_send_reply("405", "Method Not Allowed");
exit;
}
}
# when routing via usrloc, log the missed calls also
setflag(2);
route(1);
}
route[1] {
# for INVITEs enable some additional helper routes
if (is_method("INVITE")) {
if(isbflagset(2)) {########## # behind a NAT
log("MIS: Forcing proxy within router 1")
force_rtp_proxy();
};
t_on_branch("2");
t_on_reply("2");
t_on_failure("1");
}
if (!t_relay()) {
sl_reply_error();
};
exit;
}
branch_route[2] {
xlog("MIS: new branch at $ru\n");
}
onreply_route[2] {
xlog("MIS: incoming reply\n");
force_rport();
if (status =~ "(183)|(2[0-9][0-9])") {
if(nat_uac_test("19")) {
log("MIS: Hem detectat NAT");
setbflag(2); # flag for NAT
fix_nated_contact();
fix_nated_sdp("11");
force_rtp_proxy();
};
};
}
failure_route[1] {
if (t_was_cancelled()) {
exit;
}
}
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