---- Original Message ----
From: Vivienne Curran
To: Greger V. Teigre ; serusers@lists.iptel.org
Sent: Tuesday, April 05, 2005 02:25 PM
Subject: Re: [Serusers] Contact Header and SDP not rewritten

> Greger,
>
> Since fix_nated_register does not exist with 0.8.14, will
> fix_nated_contact do instead? Also if I am leaving out the
> has_totag() at the start of the script, will this greatly effect its
> functionality?
>
> Thank you,
> Vivienne
>
> "Greger V. Teigre" <greger@teigre.com> wrote:
> Vivienne,
>
> This is the first INVITE going from SER to your public phone. I have
> prefixed my comments with *==>
>
> U 84.203.148.146:5060 -> 157.190.74.151:5060
> INVITE sip:2092@157.190.74.151 SIP/2.0..Via: SIP/2.0/UDP
> 84.203.148.146;branch=z9hG4bK77bc.b54ca216.0..
> Via: SIP/2.0/UDP
> 172.16.3.31;rport=5060;received=84.203.148.14;branch=z9hG4bK1a48edc121f5bc1f..
> From: "2093" <sip:2093@84.203.148.146>;tag=2dc376dcd4655094..
> To: <sip:2092@84.203.148.146>..
> Contact: <sip:2093@84.203.148.14:5060>..
> *==> Correctly changed to the public address and port of 2093
> Supported: replaces..Call-ID: 44e1ae63c476fbff@172.16.3.31..CSeq:
> 10327 INVITE..
> User-Agent: Grandstream BT100 1.0.5.18..
> Max-Forwards: 69..Allow:
> INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE..
> Content-Type: application/sdp..
> Content-Length: 443....v=0..
> o=2093 8000 0 IN IP4 172.16.3.31..
> s=SIP Call..
> c=IN IP4 84.203.148.1484.203.148.146..
> *==> Here it seems that first fix_nated_sdp("3") is called (replace
> private IP with public IP), then force_rtp_proxy() (replace with
> proxy IP). You must only call one of them (fix_nated_sdp("1") is ok)
> t=0 0..
> m=audio 35006 RTP/AVP 0 8 4 18 2 15 99 9..
> a=sendrecv..
> a=rtpmap:0 PCMU/8000/3..
> a=rtpmap:8 PCMA/8000/3..
> a=rtpmap:4 G723/8000/3..a=rtpmap:18 G729/8000/3..
> a=rtpmap:2 G726-32/8000/3..
> a=rtpmap:15 G728/8000/3..
> a=rtpmap:99 iLBC/8000/3..
> a=fmtp:99 mode=20..
> a=rtpmap:9 G722/8000/3..
> a=ptime:20..
> a=direction:active..
> *==> Added by fix_nated_sdp("1") (and "3")
> a=oldmediaip:172.16.3.31..
> *==> Added by fix_nated_sdp("3")
> a=nortpproxy:yes..
> *==> Added by force_rtp_proxy()
>
> So, your call is proxied. Try using fix_nated_sdp("1"). It should
> make the INVITE correct. You have not posted the OK, so I don't know
> what is happening there. If you have followed the rtpproxy ONsip.org
> example in your onreply_route, you should be fine.
>
> Good luck!
> g-)
>
> ---- Original Message ----
> From: Vivienne Curran
> To: serusers@lists.iptel.org
> Sent: Tuesday, April 05, 2005 01:23 PM
> Subject: [Serusers] Contact Header and SDP not rewritten
>
>> Hello,
>>
>> I have a problem whereby when a private client rings a public client
>> only the public user can hear voice and when the public user rings
>> the private user, no audio is transmitted. After looking at the
>> messages I have have determined that the contact header and sdp part
>> of the invite contains the private address of the natted client. This
>> would lead me to believe that the registration process is incorrect.
>> My problem is that I believe my script should handle the registration
>> process correctly and I suspect that the following code is being
>> skipped: I tried changing it to nat_uac_test("19") and
>> fix_nated_sdp("3") but that didnt help.
>>> if (nat_uac_test("3")){
>>   if (method == "REGISTER" || ! search("^Record-Route:")){
>>    log("Log: Someone trying to register from private
>>    IP,rewriting\n"); fix_nated_contact(); #Rewrite contact with
>>    source IP if (method == "INVITE"){
>>     fix_nated_sdp("1"); #Add direction=active to SDP
>>     force_rtp_proxy();
>>    };
>>    force_rport(); # Add rport parameter to topmost Via
>>    setflag(6); # Mark as Nated
>>   };
>> };
>>
>> I have included the log message below and my ser.cfg as an
>> attachment. Please let me know where I could be going wrong.
>>
>> Thank you,
>> Vivienne.
>>
>> 2093 (private) ringing 2092 (public)
>>
>> U 84.203.148.14:5060 -> 84.203.148.146:5060
>>   ! INVITE sip:2092@84.203.148.146 SIP/2.0..Via: SIP/2.0/UDP
>> 172.16.3.31;branch
>>   =z9hG4bK1a48edc121f5bc1f..From: "2093"
>> <sip:2093@84.203.148.146>;tag=2dc376
>>   dcd4655094..To: <sip:2092@84.203.148.146>..Contact:
>> <sip:2093@172.16.3.31>.
>>   .Supported: replaces..Call-ID: 44e1ae63c476fbff@172.16.3.31..CSeq:
>> 10327 IN
>>   VITE..User-Agent: Grandstream BT100 1.0.5.18..Max-Forwards:
>> 70..Allow: INVI
>>
>> TE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE..Content-Type:
>> applic
>>   ation/sdp..Content-Length: 362....v=0..o=2093 8000 0 IN IP4
>> 172.16.3.31..s=
>>   SIP Call..c=IN IP4 172.16.3.31..t=0 0..m=audio 5004 RTP/AVP 0 8 4
>> 18 2 15 9
>>   9 9..a=sendrecv..a=rtpmap:0 PCMU/8000/3..a=rtpmap:8
>> PCMA/8000/3..a=rtpmap:4
>>    G723/8000/3..a=rt! pmap:18 G729/8000/3..a=rtpmap:2
>> G726-32/8000/3..a=rtpmap:
>>   15 G728/8000/3..a=rtpmap:99 iLBC/8000/3..a=fmtp:99
>> mode=20..a=rtpmap:9 G722
>>   /8000/3..a=ptime:20..
>>
>> U 84.203.148.146:5060 -> 84.203.148.14:5060
>>   SIP/2.0 100 trying -- your call is important to us..Via:
>> SIP/2.0/UDP 172.16
>>
>> .3.31;branch=z9hG4bK1a48edc121f5bc1f;rport=5060;received=84.203.148.14..Fro
>>   m: "2093" <sip:2093@84.203.148.146>;tag=2dc376dcd4655094..To:
>> <sip:2092@84.
>>   203.148.146>..Call-ID: 44e1ae63c476fbff@172.16.3.31..CSeq: 10327
>> INVITE..Se
>>   rver: Sip EXpress router (0.8.14 (i386/linux))..Content-Length:
>> 0..Warning:
>>    392 84.203.148.146:5060 "Noisy feedback tells: pid=4732
>> req_src_ip=84.203
>>   .148.14 req_src_port=5060 in_uri=sip:2092@84.203.148.146
>> out_uri=sip:2092@1
>>   57.190.74.151 via_cnt==1"....
>>
>> U 84.203.148.146:5060 -> 157.190.74.151:5060
>>   INVITE sip:2092@157.190.74.151 SIP/2.0..Via: SIP/2.0/UDP
>> 84.203.148.146;bra
>>   nch=z9hG4bK77bc.b54ca216.0..Via: SIP/2.0/UDP
>> 172.16.3.31;rport=5060;receive
>>   d=84.203.148.14;branch=z9hG4bK1a48edc121f5bc1f..From: "2093"
>> <sip:2093@84.2
>>   03.148.146>;tag=2dc376dcd4655094..To:
>> <sip:2092@84.203.148.146>..Contact: <
>>   sip:2093@84.203.148.14:5060>..Supported: replaces..Call-ID:
>> 44e1ae63c476fbf
>>   f@172.16.3.31..CSeq: 10327 INVITE..User-Agent: Grandstream BT100
>> 1.0.5.18..
>>   Max-Forwards: 69..Allow:
>> INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SU
>>   BSCRIBE..Content-Type: application/sdp..Content-Length:
>> 443....v=0..o=2093
>>   8000 0 IN IP4 172.16.3.31..s=SIP Call..c=IN IP4
>> 84.203.148.1484.203.148.146
>>   ..t=0 0..m=audio 35006 RTP/AVP 0 8 4 18 2 15 99
>> 9..a=sendrecv..a=rtpmap:0 P
>>   CMU/8000/3..a=rtpmap:8 PCMA/8000/3..a=rtpmap:4
>> G723/8000/3..a=rtpmap:18 G72
>>   9/8000/3..a=rtpmap:2 G726-32/8000/3..a=rtpmap:15
>> G728/8000/3..a=rtpmap:99 i
>>   LBC/8000/3..a=fmtp:99 mode=20..a=rtpmap:9
>> G722/8000/3..a=ptime:20..a=direct
>>   ion:active..a=oldmediaip:172.16.3.31..a=nortpproxy:yes..
>>
>> U 84.203.148.146:5060 -> 157.190.74.150:5060
>>   INVITE sip:2092@157.190.74.150 SIP/2.0..Via: SIP/2.0/UDP
>> 84.203.148.146;bra
>>   nch=z9hG4bK77bc.b54ca216.1..Via: SIP/2.0/UDP
>> 172.16.3.31;rport=5060;receive
>>   d=84.203.148.14;branch=z9hG4bK1a48edc121f5bc1f..From: "2093"
>> <sip:2093@84.2
>>   03.148.146>;tag=2dc376dcd4655094..To:
>> <sip:2092@84.203.148.146>..Contact: <
>>   sip:2093@84.203.148.14:5060>..Supported: replaces..Call-ID:
>> 44e1ae63c476fbf
>>   f@172.16.3.31..CSeq: 10327 INVITE..User-Agent: Grandstream BT100
>> 1.0.5.18..
>>   Max-Forwards: 69..Allow:
>> INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SU
>>   BSCRIBE..Content-Type: application/sdp..Content-Length:
>> 443....v=0..o=2093
>>   8000 0 IN IP4 172.16.3.31..s=SIP Call..c=IN IP4
>> 84.203.148.1484.203.148.146
>>   ..t=0 0..m=audio 35006 RTP/AVP 0 8 4 18 2 15 99
>> 9..a=sendrecv..a=rtpmap:0 P
>>   CMU/8000/3..a=rtpmap:8 PCMA/8000/3..a=rtpmap:4
>> G723/8000/3..a=rtpmap:18 G72
>>   9/8000/3..a=rtpmap:2 G726-32/8000/3..a=rtpmap:15
>> G728/8000/3..a=rtpmap:99 i
>>   LBC/8000/3..a=fmtp:99 mode=20..a=rtpmap:9
>> G722/8000/3..a=ptime:20..a=direct
>>   ion:active..a=oldmediaip:172.16.3.31..a=nortpproxy:yes..
>>
>> U 157.190.74.151:5060 -> 84.203.148.146:5060
>>   SIP/2.0 100 Trying..Via: SIP/2.0/UDP
>> 84.203.148.146;branch=z9hG4bK77bc.b54c
>>   a216.0..Via: SIP/2.0/UDP
>> 172.16.3.31;rport=5060;received=84.203.148.14;bran
>>   ch=z9hG4bK1a48edc121f5bc1f..From: "2093"
>> <sip:2093@84.203.148.146>;tag=2dc3
>>   76dcd4655094..To: <sip:2092@84.203.148.146>..Call-ID:
>> 44e1ae63c476fbff@172.
>>   16.3.31..CSeq: 10327 INVITE..User-Agent: Grandstream BT100
>> 1.0.5.18..Conten
>>   t-Length: 0....
>>
>> U 157.190.74.151:5060 -> 84.203.148.146:5060
>>   SIP/2.0 180 Ringing! ..Via: SIP/2.0/UDP
>> 84.203.148.146;branch=z9hG4bK77bc.b54
>>   ca216.0..Via: SIP/2.0/UDP
>> 172.16.3.31;rport=5060;received=84.203.148.14;bra
>>   nch=z9hG4bK1a48edc121f5bc1f..From: "2093"
>> <sip:2093@84.203.148.146>;tag=2dc
>>   376dcd4655094..To:
>> <sip:2092@84.203.148.146>;tag=10bdf2044401a257..Call-ID:
>>    44e1ae63c476fbff@172.16.3.31..CSeq: 10327 INVITE..User-Agent:
>> Grandstream
>>   BT100 1.0.5.18..Content-Length: 0....
>>
>> Send instant messages to your online friends
>> http://uk.messenger.yahoo.com
>>
>>
>>
>> #
>> # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $
>> #
>> # simple quick-start config script
>> #
>>
>> # ----------- global configuration parameters
>> ------------------------
>>
>> #debug=3         # deb! ug level (cmd line: -dddddddddd)
>> #fork=yes
>> #log_stderror=no # (cmd line: -E)
>>
>> /* Uncomment these lines to enter debugging mode
>> debug=7
>> fork=no
>> log_stderror=yes
>> */
>>
>> check_via=no # (cmd. line: -v)
>> dns=no           # (cmd. line: -r)
>> rev_dns=no      # (cmd. line: -R)
>> #port=5060
>> #children=4
>> fifo="/tmp/ser_fifo"
>>
>> alias="157.190.74.152:5060"
>>
>> # ------------------ module loading
>> ----------------------------------
>>
>> # Uncomment this if you want to use SQL database
>> loadmodule "/usr/lib/ser/modules/mysql.so"
>>
>> loadmodule "/usr/lib/ser/modules/sl.so"
>> loadmodule "/usr/lib/ser/modules/tm.so"
>> loadmodule "/usr/lib/ser/modules/rr.so"
>> loadmodule "/usr/lib/ser/modules/maxfwd.so"
>> loadmodule "/usr/lib/ser/modules/usrloc.so"
>> loadmodule "/usr/lib/ser/modules/registrar.so"
>> loadmodule "/usr/lib/ser/modules/textops.so"
>> loadmodule "/usr/lib/ser/modules/nathelper.so"
>> #loadmodule "/usr/lib/ser/modules/pa.so"
>> loadmodule "/usr/lib/ser/modules/cpl-c.so"
>>
>> # Uncomment this if you want digest authentication
>> # mysql.so must be loaded !
>> loadmodule "/usr/lib/ser/modules/auth.so"
>> loadmodule "/usr/lib/ser/modules/auth_db.so"
>>
>> # ----------------- setting module-specific parameters
>> ---------------
>>
>> # -- usrloc params --
>>
>> #modparam("usrloc", "db_mode",   0)
>>
>> # Uncomment this if you want to use SQL database
>> # for persistent storage and comment the previous line
>> modparam("usrloc", "db_mode", 2)
>>
>> # -- auth params --
>> # Uncomment if you are using auth module
>> #
>> modparam("auth_db", "calculate_ha1", yes)
>> #
>> # If you set "calculate_ha1" parameter to yes (which true in this
>> config),
>> # uncomment also the following parameter)
>> #
>> modparam("auth_db", "password_column", "password")
>>
>> # -- rr params --
>> # add value to ;lr param to make some broken UAs happy
>> #NB Had to up this value from 1 to 11 because reinvites were
>> bombarding called phone
>> modparam("rr", "enable_full_lr", 11)
>>
>> #!! Nathelper
>> modparam("registrar", "nat_flag", 60)
>> modparam("nathelper", "natping_interval", 30) #Ping interval 30 s
>> modparam("nathelper", "ping_nated_only", 1)   #Ping only clients
>> behind NAT
>> modparam("nathelper", "rtpproxy_sock", "/var/run/rtpproxy.sock")
>>
>> modparam("tm", "fr_inv_timer", 20)
>>
>> #modparam("pa", "default_expires", 3600)
>>
>> modparam("usrloc", "db_url", "sql://root:1alfa156@localhost/ser")
>>
>> #modparam("cpl-c", "cpl_db", "mysql://root:1alfa156@localhost/ser")
>> #modparam("cpl-c", "cpl_table", "cpl")
>> #modparam("cpl-c", "cpl_dtd_file",
>> "/work/sip_router/modules/cpl-ccpl-06.dtd")
>>
>> # ------------------------- request routing logic
>> -------------------
>>
>> # main routing logic
>>
>> route{
>>
>> # initial sanity checks -- messages with
>> # max_forwards==0, or excessively long requests
>> if (!mf_process_maxfwd_header("10")) {
>> sl_send_reply("483","Too Many Hops");
>> break;
>> };
>> if ( msg:len > max_len ) {
>> sl_send_reply("513", "Message too big");
>> break;
>> };
>>
>> #######################################################################################
>> if (nat_uac_test("3")){
>> if (method == "REGISTER" || ! search("^Record-Route:")){
>> log("Log: So! meone trying to register from private IP,rewriting\n");
>> fix_nated_contact(); #Rewrite contact with source IP
>> if (method == "INVITE"){
>> fix_nated_sdp("1"); #Add direction=active to SDP
>> force_rtp_proxy();
>> };
>> force_rport(); # Add rport parameter to topmost Via
>> setflag(6); # Mark as Nated
>> };
>> };
>> ########################################################################################
>>
>> # we record-route all messages -- to make sure that
>> # subsequent messages will go through our proxy; that's
>> # particularly good if upstream and downstream entities
>> # use different transport protocol
>>
>> if (method =="REGISTER") record_route();
>>
>> # loose-route processing
>> if (loose_route()) {
>> #commented 11/02/05
>> #t_relay();
>> route(1);
>> break;
>> };
>>
>> # if the request is for other domain use UsrLoc
>> ! # (in case, it does not work, use the following command
>> # with proper names and addresses in it)
>> if (uri==myself) {
>>
>> log(1,"into loop");
>> if (method=="REGISTER") {
>>
>> # Uncomment this if you want to use digest authentication
>> # if (!www_authorize("157.190.74.152", "subscriber")) {
>> # www_challenge("157.190.74.152", "0");
>> # break;
>> # };
>>
>> #cpl_process_register();
>>
>> save("location");
>> break;
>> };
>>
>> # if (method=="SUBSCRIBE")
>> # {
>> # log(1, "Subscribe\n");
>> # if(t_newtran())
>> # {
>> # log(1, "Registrar\n");
>> # handle_subscription("registrar");
>> # };
>> # break;
>> # };
>>
>> lookup("aliases");
>> if (!uri==myself) {
>> append_hf("P-hint: outbound alias\r\n");
>> route(1);
>> break;
>> };
>>
>> if (method=="INVITE"){
>>
>> log(1,"in ! invite loop");
>> #break; #no 100 trying
>> #if (!cpl_run_script("incoming","is_stateless"))
>> #{
>> # #script execution failed
>> # t_reply("500", "CPL script execution failed");
>> #};
>>
>> t_on_failure("1");
>> };
>>
>> # native SIP destinations are handled using our USRLOC DB
>> if (!lookup("location")) {
>> #sl_send_reply("404", "Not Found");
>> route(2);
>> break;
>> };
>> };
>>
>> # forward to current uri now; use stateful forwarding; that
>> # works reliably even if we forward from TCP to UDP
>> #commented 11/02/05#######################
>> if (!t_relay()) {
>> sl_reply_error();
>> };
>>
>> #route(1);
>> }
>>
>> ######################################entered
>> 11/02/05############################################################
>> route[1]
>> {
>> #!!Nathelper
>> if(uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" &&
>> !search("^Route:")){
>> sl_send_reply("479", "We don't forward to private IP addresses");
>> break;
>> };
>>
>> if (isflagset(6)){
>> force_rtp_proxy();
>> }
>>
>> t_on_reply("1");
>>
>> if(!t_relay()){
>> sl_reply_error();
>> break;
>> };
>>
>> }
>>
>> ######################################entered
>> 11/02/05############################################################
>> #!! Nathelper
>> onreply_route[1] {
>> if(isflagset(6) && status =~ "(183)|2[0-9][0-9]"){
>> fix_nated_contact();
>> force_rtp_proxy();
>> }else if (nat_uac_test("1")){
>> fix_nated_contact();
>> };
>> }
>> #################################################################################################################
>>
>> # ------------- handling of unavai! lable user ------------------
>> route[2] {
>>
>>         # non-Voip -- just send "off-line"
>>         if (!(method == "INVITE" || method == "ACK" || method ==
>> "CANCEL")) {
>>                 sl_send_reply("404", "Not Found");
>>                 break;
>>         };
>>
>>         # forward to voicemail now
>>         rewritehostport("157.190.74.152:5062");
>>         t_relay_to_udp("157.190.74.152", "5062");
>> }
>>
>> # if forwarding downstream did not succeed, try voicemail running
>> # at 172.16.2.120:5062
>>
>> failure_route[1] {
>>         revert_uri();
>>         rewritehostport("157.190.74.152:5062");
>>         append_branch();
>>         t_relay_to_udp("157.190.74.152", "5062");
>> }
>>
>>
>>
>>
>>
>> _______________________________________________
>> Serusers mailing list
>> serusers@lists.iptel.org
>> http://lists.iptel.org/mailman/listinfo/serusers
> Send instant messages to your online friends
> http://uk.messenger.yahoo.com