[FEATURE] b2b_bridge_retry() brakes SIP headers

[denyspozniak]

Hello!

In the example below, when doing serial call forking b2b_bridge_retry() brakes SIP header in B2-leg (sip:102@pbx):

• To header (from original A-leg)
• From display (completely missing)
• Contact (it's not clear where from)

A-leg (sip:[email protected]:50600) --> B1-leg (101@pbx)
                                                            --> B2-leg (102@pbx)

If you need help with reproducing or need logs/pcap traces, I can send privately.

route{
  if ( is_method("INVITE") && !has_totag() ) {
    b2b_client_new("dst1", "sip:101@pbx");
    b2b_server_new("src1");
    b2b_init_request("sbc");
    exit;
  }
}

route[b2b_logic_reply] {
    if ( $rm == "INVITE" && $rs == 403 ) {
        b2b_client_new("dst2", "sip:102@pbx");
        b2b_bridge_retry("dst2");
    }
}

SIP INVITE

---INCOMING A-leg:
INVITE sip:[email protected]:50600 SIP/2.0
Via: SIP/2.0/UDP 172.28.128.1:5060;branch=z9hG4bK80d7e96fc5a1ef11bf692e066dce02e3;rport
From: "PhonerLite" <sip:[email protected]>;tag=3364579678
To: <sip:[email protected]:50600>
Call-ID: [email protected]
CSeq: 1 INVITE
Contact: <sip:[email protected]>
Content-Type: application/sdp
Allow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK
Max-Forwards: 70
Supported: replaces, from-change, 100rel
User-Agent: PhonerLite/3.26
P-Preferred-Identity: <sip:[email protected]>
Content-Length:   373

---OUTGOING B1-leg:
INVITE sip:101@pbx SIP/2.0
Via: SIP/2.0/UDP 192.168.56.181:5060;branch=z9hG4bK04c.b2dad6b6.0
To: <sip:101@pbx>
From: "PhonerLite" <sip:[email protected]>;tag=6ac03514de7b804f3828ecc535d25839-a3a5
CSeq: 2 INVITE
Call-ID: .201.7518725.1731678282.1420985851
Max-Forwards: 69
Content-Length: 373
User-Agent: OpenSIPS (3.5.2 (x86_64/linux))
Content-Type: application/sdp
Supported: replaces, from-change, 100rel
Allow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK
X-CallID: [email protected]
Contact: <sip:[email protected]>

---OUTGOING B2-leg:
INVITE sip:102@pbx SIP/2.0
Via: SIP/2.0/UDP 192.168.56.181:5060;branch=z9hG4bK1029.925e8a76.0
To: <sip:[email protected]:50600>
From: <sip:[email protected]>;tag=36d52ec24f434cecf68e6c41b2db31a9-a3a5
CSeq: 2 INVITE
Call-ID: .64.1873052.1731678284.1474255093
Max-Forwards: 69
Content-Length: 373
User-Agent: OpenSIPS (3.5.2 (x86_64/linux))
Content-Type: application/sdp
Supported: replaces, from-change, 100rel
Allow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK
X-CallID: [email protected]
Contact: <sip:[email protected]>

opensips -V

version: opensips 3.5.2 (x86_64/linux)
flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, HP_MALLOC, DBG_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535
poll method support: poll, epoll, sigio_rt, select.
git revision: 8a183b0c0
main.c compiled on  with gcc 9