Add '199' option-tag to INVITE's Supported header, REF 14595

According to RFC6228 Chapter 4, when UAC sends an initial dialog initiation request and is willing to receive 199 responses, it must insert '199' option-tag' in the Supported header field.

requested review from @iryna.antsyferova

assigned to @Yalu

added 2 commits

• b57df527 - 1 commit from branch asterisk_rdkb
• a6abbc22 - Add '199' option-tag to INVITE's Supported header, REF 14595

Compare with previous version

added 1 commit

• 1926024a - Add '199' option-tag to INVITE's Supported header, REF 14595

Compare with previous version

The "199" option-tag is added only to outgoing INVITE request, verified the call is processed without issues. INVITE with the fix applied:

INVITE sip:102@192.168.0.2:5060;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.0.64:5060;rport;branch=z9hG4bKPj9fa7cdba-0e67-487c-81b1-3d7fe90cab67
From: "100" <sip:100@192.168.0.2;user=phone>;tag=e8b79663-7246-43de-b658-4f35a83da5e2
To: <sip:102@192.168.0.2;user=phone>
Contact: <sip:100@192.168.0.64:5060>
Call-ID: f1e5812c-ada5-43d9-851b-8c04919ab4fe
CSeq: 9069 INVITE
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, REFER
Supported: 100rel, timer, replaces, norefersub, 199
Session-Expires: 1800
Min-SE: 90
P-Early-Media: supported
Max-Forwards: 70
User-Agent: Mediatek-SMART7-004.002.001
Content-Type: application/sdp
Content-Length:   281

v=0
o=- 174784725 174784725 IN IP4 192.168.0.64
s=Asterisk
c=IN IP4 192.168.0.64
t=0 0
m=audio 7080 RTP/AVP 9 8 0 101
a=rtpmap:9 G722/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:20
a=sendrecv

approved this merge request

merged