mirror of
https://github.com/pion/webrtc.git
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Generates working SDP
Currently doesn't match the WebRTC API but is enough to move on to ICE
This commit is contained in:
Sean DuBois
172
main.go
172
main.go
@@ -1,178 +1,10 @@
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package main
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import (
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"encoding/base64"
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"fmt"
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"github.com/pions/webrtc/internal/sdp"
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)
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var offer string = `v=5
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o=- 5170208399471905959 3 IN IP4 127.0.0.1
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s=-
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t=0 0
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a=group:BUNDLE audio video
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a=msid-semantic: WMS GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg
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m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126
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c=IN IP4 0.0.0.0
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a=rtcp:9 IN IP4 0.0.0.0
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a=ice-ufrag:62Xk
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a=ice-pwd:wmdmbYe4GoL24xoECsY5dUDW
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a=ice-options:trickle
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a=fingerprint:sha-256 86:3E:1E:81:12:B2:3F:1B:8F:44:D9:6D:8C:A7:EA:93:AF:A3:EE:12:4A:51:3F:BE:45:4D:7F:58:F2:91:10:A3
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a=setup:actpass
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a=mid:audio
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a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
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a=sendrecv
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a=rtcp-mux
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a=rtpmap:111 opus/48000/2
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a=rtcp-fb:111 transport-cc
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a=fmtp:111 minptime=10;useinbandfec=1
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a=rtpmap:103 ISAC/16000
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a=rtpmap:104 ISAC/32000
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a=rtpmap:9 G722/8000
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a=rtpmap:0 PCMU/8000
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a=rtpmap:8 PCMA/8000
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a=rtpmap:106 CN/32000
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a=rtpmap:105 CN/16000
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a=rtpmap:13 CN/8000
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a=rtpmap:110 telephone-event/48000
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a=rtpmap:112 telephone-event/32000
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a=rtpmap:113 telephone-event/16000
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a=rtpmap:126 telephone-event/8000
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a=ssrc:2887999179 cname:xVOr2VlleqfWPmYI
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a=ssrc:2887999179 msid:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg d11be3f4-352b-4873-bef6-3140ddddad32
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a=ssrc:2887999179 mslabel:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg
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a=ssrc:2887999179 label:d11be3f4-352b-4873-bef6-3140ddddad32
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m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102
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c=IN IP4 0.0.0.0
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a=rtcp:9 IN IP4 0.0.0.0
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a=ice-ufrag:62Xk
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a=ice-pwd:wmdmbYe4GoL24xoECsY5dUDW
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a=ice-options:trickle
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a=fingerprint:sha-256 86:3E:1E:81:12:B2:3F:1B:8F:44:D9:6D:8C:A7:EA:93:AF:A3:EE:12:4A:51:3F:BE:45:4D:7F:58:F2:91:10:A3
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a=setup:actpass
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a=mid:video
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a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
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a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
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a=extmap:4 urn:3gpp:video-orientation
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a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
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a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
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a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type
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a=extmap:8 http://www.webrtc.org/experiments/rtp-hdrext/video-timing
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a=sendrecv
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a=rtcp-mux
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a=rtcp-rsize
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a=rtpmap:96 VP8/90000
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a=rtcp-fb:96 goog-remb
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a=rtcp-fb:96 transport-cc
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a=rtcp-fb:96 ccm fir
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a=rtcp-fb:96 nack
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a=rtcp-fb:96 nack pli
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a=rtpmap:97 rtx/90000
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a=fmtp:97 apt=96
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a=rtpmap:98 VP9/90000
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a=rtcp-fb:98 goog-remb
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a=rtcp-fb:98 transport-cc
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a=rtcp-fb:98 ccm fir
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a=rtcp-fb:98 nack
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a=rtcp-fb:98 nack pli
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a=rtpmap:99 rtx/90000
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a=fmtp:99 apt=98
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a=rtpmap:100 red/90000
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a=rtpmap:101 rtx/90000
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a=fmtp:101 apt=100
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a=rtpmap:102 ulpfec/90000
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a=ssrc-group:FID 2760193303 4032463893
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a=ssrc:2760193303 cname:xVOr2VlleqfWPmYI
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a=ssrc:2760193303 msid:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg d4fc8e95-10b3-4772-9a17-ec7e3c5d3c10
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a=ssrc:2760193303 mslabel:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg
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a=ssrc:2760193303 label:d4fc8e95-10b3-4772-9a17-ec7e3c5d3c10
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a=ssrc:4032463893 cname:xVOr2VlleqfWPmYI
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a=ssrc:4032463893 msid:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg d4fc8e95-10b3-4772-9a17-ec7e3c5d3c10
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a=ssrc:4032463893 mslabel:GCn7YH8sORLpim711LJvDoE5IX1awTl3EcOg
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a=ssrc:4032463893 label:d4fc8e95-10b3-4772-9a17-ec7e3c5d3c10
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`
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var answer string = `v=0
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o=- 7350794434983194469 2 IN IP4 127.0.0.1
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s=-
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t=0 0
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a=group:BUNDLE audio video
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a=msid-semantic: WMS
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m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126
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c=IN IP4 0.0.0.0
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a=rtcp:9 IN IP4 0.0.0.0
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a=ice-ufrag:2ukV
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a=ice-pwd:hAhdXfH8H8+IqWTdIj7q+XBa
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a=ice-options:trickle
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a=fingerprint:sha-256 26:12:82:57:36:FC:E3:3A:51:2E:A0:A8:33:BA:CC:A1:CD:9E:0B:FD:B5:CE:00:8C:23:F8:3B:A8:C4:B0:17:87
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a=setup:active
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a=mid:audio
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a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
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a=recvonly
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a=rtcp-mux
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a=rtpmap:111 opus/48000/2
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a=rtcp-fb:111 transport-cc
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a=fmtp:111 minptime=10;useinbandfec=1
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a=rtpmap:103 ISAC/16000
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a=rtpmap:104 ISAC/32000
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a=rtpmap:9 G722/8000
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a=rtpmap:0 PCMU/8000
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a=rtpmap:8 PCMA/8000
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a=rtpmap:106 CN/32000
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a=rtpmap:105 CN/16000
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a=rtpmap:13 CN/8000
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a=rtpmap:110 telephone-event/48000
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a=rtpmap:112 telephone-event/32000
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a=rtpmap:113 telephone-event/16000
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a=rtpmap:126 telephone-event/8000
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m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102
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c=IN IP4 0.0.0.0
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a=rtcp:9 IN IP4 0.0.0.0
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a=ice-ufrag:2ukV
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a=ice-pwd:hAhdXfH8H8+IqWTdIj7q+XBa
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a=ice-options:trickle
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a=fingerprint:sha-256 26:12:82:57:36:FC:E3:3A:51:2E:A0:A8:33:BA:CC:A1:CD:9E:0B:FD:B5:CE:00:8C:23:F8:3B:A8:C4:B0:17:87
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a=setup:active
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a=mid:video
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a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
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a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
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a=extmap:4 urn:3gpp:video-orientation
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a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
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a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
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a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type
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a=extmap:8 http://www.webrtc.org/experiments/rtp-hdrext/video-timing
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a=recvonly
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a=rtcp-mux
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a=rtcp-rsize
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a=rtpmap:96 VP8/90000
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a=rtcp-fb:96 goog-remb
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a=rtcp-fb:96 transport-cc
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a=rtcp-fb:96 ccm fir
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a=rtcp-fb:96 nack
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a=rtcp-fb:96 nack pli
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a=rtpmap:97 rtx/90000
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a=fmtp:97 apt=96
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a=rtpmap:98 VP9/90000
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a=rtcp-fb:98 goog-remb
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a=rtcp-fb:98 transport-cc
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a=rtcp-fb:98 ccm fir
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a=rtcp-fb:98 nack
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a=rtcp-fb:98 nack pli
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a=rtpmap:99 rtx/90000
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a=fmtp:99 apt=98
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a=rtpmap:100 red/90000
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a=rtpmap:101 rtx/90000
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a=fmtp:101 apt=100
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a=rtpmap:102 ulpfec/90000
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`
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func main() {
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o := &sdp.SessionDescription{}
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fmt.Println(o.Unmarshal(offer))
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fmt.Println(o.Marshal() == offer)
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a := &sdp.SessionDescription{}
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fmt.Println(a.Unmarshal(answer))
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fmt.Println(a.Marshal() == answer)
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fmt.Println(base64.StdEncoding.EncodeToString([]byte(generateVP8OnlyAnswer().Marshal())))
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}
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113
sdp_helper.go
Normal file
113
sdp_helper.go
Normal file
@@ -0,0 +1,113 @@
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package main
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import (
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"fmt"
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"math/rand"
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"net"
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"strconv"
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"github.com/pions/webrtc/internal/sdp"
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)
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// VP8, recvonly SDP
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// TODO RTCPeerConnection.localDescription()
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func generateVP8OnlyAnswer() *sdp.SessionDescription {
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videoMediaDescription := &sdp.MediaDescription{
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MediaName: "video 9 UDP/TLS/RTP/SAVPF 96 97",
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ConnectionData: "IN IP4 0.0.0.0",
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Attributes: []string{
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"rtcp:9 IN IP4 0.0.0.0",
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// TODO kc5nra proper fingerprint
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"fingerprint:sha-256 26:12:82:57:36:FC:E3:3A:51:2E:A0:A8:33:BA:CC:A1:CD:9E:0B:FD:B5:CE:00:8C:23:F8:3B:A8:C4:B0:17:87",
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"setup:active",
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"mid:video",
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"recvonly",
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"rtcp-mux",
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"rtcp-rsize",
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"rtpmap:96 VP8/90000",
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"rtcp-fb:96 goog-remb",
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"rtcp-fb:96 transport-cc",
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"rtcp-fb:96 ccm fir",
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"rtcp-fb:96 nack",
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"rtcp-fb:96 nack pli",
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"rtpmap:97 rtx/90000",
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"fmtp:97 apt=96",
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"ice-ufrag:" + randSeq(4),
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"ice-pwd:" + randSeq(24),
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},
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}
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// Generate only UDP host candidates for ICE
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basePriority := rand.Int()
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for _, c := range hostCandidates() {
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id := rand.Int()
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videoMediaDescription.Attributes = append(videoMediaDescription.Attributes, fmt.Sprintf("candidate:%d 1 UDP %d %s 1816 typ host", id, basePriority, c))
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videoMediaDescription.Attributes = append(videoMediaDescription.Attributes, fmt.Sprintf("candidate:%d 2 UDP %d %s 1816 typ host", id, basePriority, c))
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basePriority = basePriority + 1
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}
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sessionId := strconv.FormatUint(uint64(rand.Uint32())<<32+uint64(rand.Uint32()), 10)
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return &sdp.SessionDescription{
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ProtocolVersion: 0,
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Origin: "- " + sessionId + " 2 IN IP4 127.0.0.1",
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SessionName: "-",
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Timing: []string{"0 0"},
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Attributes: []string{
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"group:BUNDLE audio video",
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"msid-semantic: WMS",
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},
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MediaDescriptions: []*sdp.MediaDescription{
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videoMediaDescription,
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},
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}
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}
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//TODO Sean-Der temporary
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func randSeq(n int) string {
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letters := []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
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b := make([]rune, n)
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for i := range b {
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b[i] = letters[rand.Intn(len(letters))]
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}
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return string(b)
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}
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//TODO Sean-Der temporary
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func hostCandidates() (ips []string) {
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ifaces, err := net.Interfaces()
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if err != nil {
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return ips
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}
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for _, iface := range ifaces {
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if iface.Flags&net.FlagUp == 0 {
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continue // interface down
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}
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if iface.Flags&net.FlagLoopback != 0 {
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continue // loopback interface
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}
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addrs, err := iface.Addrs()
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if err != nil {
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return ips
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}
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for _, addr := range addrs {
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var ip net.IP
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switch v := addr.(type) {
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case *net.IPNet:
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ip = v.IP
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case *net.IPAddr:
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ip = v.IP
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}
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if ip == nil || ip.IsLoopback() {
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continue
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}
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ip = ip.To4()
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if ip == nil {
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continue // not an ipv4 address
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}
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ips = append(ips, ip.String())
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}
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}
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return ips
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}
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Reference in New Issue
Block a user