{"id":84669,"date":"2026-07-26T15:49:35","date_gmt":"2026-07-26T07:49:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/84669.html"},"modified":"2026-07-26T15:49:35","modified_gmt":"2026-07-26T07:49:35","slug":"%e5%9f%ba%e4%ba%8egosip%e5%ba%93%e5%ae%9e%e7%8e%b0%e5%9b%bd%e6%a0%87%e4%bf%a1%e4%bb%a4%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e6%88%98%e6%95%99%e7%a8%8b%ef%bc%9a%e4%bb%8eserver%e5%88%b0%e6%94%b6%e5%8f%91","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/84669.html","title":{"rendered":"\u57fa\u4e8egosip\u5e93\u5b9e\u73b0\u56fd\u6807\u4fe1\u4ee4\u670d\u52a1\u5668\u5b9e\u6218\u6559\u7a0b\uff1a\u4eceserver\u5230\u6536\u53d1\u4fe1\u4ee4"},"content":{"rendered":"<p>\u672c\u7bc7\u4ee5 core\/app\/sev\/vss \u4e3a\u53c2\u7167&#xff0c;\u8bb2\u89e3VSS\u662f\u5982\u4f55\u63a5\u5165 github.com\/ghettovoice\/gosip&#xff0c;\u7528\u6765\u5b8c\u6210 SIP \u4fe1\u4ee4\u7684\u201c\u4ece\u6536\u8bf7\u6c42\u3001\u5230\u54cd\u5e94&#xff0c;\u518d\u5230\u4e3b\u52a8\u53d1\u8d77\u53d1\u8d77\u8bf7\u6c42&#xff0c;\u4ee5 INVITE&#043;ACK\u4e3a\u4f8b\u3002<\/p>\n<p>\u53c2\u8003\u4ee3\u7801 \u70b9\u51fb\u76f4\u8fbe<\/p>\n<p>\u4e3a\u4fbf\u4e8e\u843d\u5730&#xff0c;\u4e0b\u9762\u4f1a\u7528 INVITE \u8d2f\u7a7f\u4e24\u6761\u5178\u578b\u94fe\u8def&#xff1a;<\/p>\n<li>\u5165\u7ad9 INVITE&#xff08;\u8bbe\u5907 -&gt; VSS&#xff09;&#xff1a;VSS \u7684 InviteLogic \u8d1f\u8d23\u89e3\u6790 SDP\u3001\u5206\u914d\u672c\u5730 RTP \u7aef\u53e3\u3001\u56de 200OK&#043;SDP\u3002<\/li>\n<li>\u51fa\u7ad9 INVITE&#xff08;VSS -&gt; \u8bbe\u5907&#xff09;&#xff1a;VSS \u7684 VideoLiveInvite \u8d1f\u8d23\u6784\u5efa SDP\u3001\u53d1\u8d77 INVITE\u3001\u89e3\u6790\u54cd\u5e94 SDP\u3001\u518d\u53d1 ACK\u3002<\/li>\n<hr \/>\n<h3>1. VSS \u4e2d gosip \u7684\u89d2\u8272<\/h3>\n<p>\u5728 core\/app\/sev\/vss \u4e2d&#xff0c;gosip.Server \u65e2\u627f\u62c5\u201c\u670d\u52a1\u7aef&#xff08;\u63a5\u6536\u8bbe\u5907\u8bf7\u6c42&#xff09;\u201d&#xff0c;\u4e5f\u627f\u62c5\u201c\u5ba2\u6237\u7aef&#xff08;\u4e3b\u52a8\u53d1\u8d77\u8bf7\u6c42&#xff09;\u201d\u7684\u4e8b\u52a1\u5c42\u80fd\u529b&#xff1a;<\/p>\n<ul>\n<li>\u4f5c\u4e3a\u670d\u52a1\u7aef&#xff1a;server.NewSipSev(svcCtx).SipGbsServer(&#8230;) \u521b\u5efa gosip.NewServer(&#8230;)&#xff0c;\u5e76\u7528 OnRequest \u628a REGISTER \/ INVITE \/ ACK \/ BYE \/ MESSAGE \u7b49\u65b9\u6cd5\u8def\u7531\u5230\u4e1a\u52a1 handler\u3002<\/li>\n<li>\u4f5c\u4e3a\u5ba2\u6237\u7aef&#xff1a;\u51fa\u7ad9\u53d1\u8d77 SIP \u65f6&#xff0c;GBSSender.Send() \u4f1a\u6839\u636e TransportProtocol \u9009\u62e9 GBSUDPSev \/ GBSTCPSev&#xff0c;\u7136\u540e\u8c03\u7528 RequestWithContext(ctx, req) \u7b49\u5f85\u4e8b\u52a1\u8fd4\u56de\u7684\u6700\u7ec8\u54cd\u5e94\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>2. \u521b\u5efa\u670d\u52a1<\/h3>\n<p>VSS \u7a0b\u5e8f\u5165\u53e3\u5728 core\/app\/sev\/vss\/main.go\u3002\u542f\u52a8\u987a\u5e8f\u53ef\u4ee5\u6982\u62ec\u4e3a&#xff1a;<\/p>\n<ul>\n<li>\u52a0\u8f7d\u914d\u7f6e\u3001\u521b\u5efa svcCtx<\/li>\n<li>\u521d\u59cb\u5316&#xff08;initialize.DO&#xff09;<\/li>\n<li>\u542f\u52a8\u4e24\u4e2a SIP Server&#xff1a;GBS over TCP &#043; UDP<\/li>\n<li>\u542f\u52a8 SIP \u53d1\u9001\u5904\u7406\u5faa\u73af&#xff08;gbs_proc.SendLogic \u7b49&#xff09;<\/li>\n<li>\u7b49\u5f85\u9000\u51fa\u5e76\u8c03\u7528 Shutdown()<\/li>\n<\/ul>\n<p>main.go \u4e2d\u4e0e SIP Server \u76f8\u5173\u7684\u5173\u952e\u4ee3\u7801\u7247\u6bb5\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ SIP \u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">var<\/span> wg sync<span class=\"token punctuation\">.<\/span>WaitGroup<br \/>\nwg<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ GBS TCP<\/span><br \/>\n<span class=\"token keyword\">go<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">defer<\/span> wg<span class=\"token punctuation\">.<\/span><span class=\"token function\">Done<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nserver<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewSipSev<\/span><span class=\"token punctuation\">(<\/span>svcCtx<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">SipGbsServer<\/span><span class=\"token punctuation\">(<\/span>server<span class=\"token punctuation\">.<\/span>SipTCP<span class=\"token punctuation\">,<\/span> gbs_sip<span class=\"token punctuation\">.<\/span><span class=\"token function\">RegisterHandlers<\/span><span class=\"token punctuation\">(<\/span>svcCtx<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ GBS UDP<\/span><br \/>\n<span class=\"token keyword\">go<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">defer<\/span> wg<span class=\"token punctuation\">.<\/span><span class=\"token function\">Done<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nserver<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewSipSev<\/span><span class=\"token punctuation\">(<\/span>svcCtx<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">SipGbsServer<\/span><span class=\"token punctuation\">(<\/span>server<span class=\"token punctuation\">.<\/span>SipUDP<span class=\"token punctuation\">,<\/span> gbs_sip<span class=\"token punctuation\">.<\/span><span class=\"token function\">RegisterHandlers<\/span><span class=\"token punctuation\">(<\/span>svcCtx<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>wg<span class=\"token punctuation\">.<\/span><span class=\"token function\">Wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token operator\">&#8230;<\/span><br \/>\nserver<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewSipProc<\/span><span class=\"token punctuation\">(<\/span>svcCtx<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">DO<\/span><span class=\"token punctuation\">(<\/span><br \/>\n<span class=\"token comment\">\/\/ &#8230;<\/span><br \/>\n<span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span>gbs_proc<span class=\"token punctuation\">.<\/span>SendLogic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token comment\">\/\/ &#8230;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token operator\">&lt;-<\/span>stop<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>svcCtx<span class=\"token punctuation\">.<\/span>GBSTCPSev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">Shutdown<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>svcCtx<span class=\"token punctuation\">.<\/span>GBSUDPSev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">Shutdown<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h4>2.1 SipGbsServer&#xff1a;\u771f\u6b63\u521b\u5efa gosip.NewServer &#043; \u76d1\u542c &#043; \u6302\u8f7d handler<\/h4>\n<p>SipGbsServer \u5728 core\/app\/sev\/vss\/internal\/server\/sip.go \u4e2d\u5b9e\u73b0\u3002\u5b83\u5b8c\u6210\u4e86\u56db\u4ef6\u4e8b&#xff1a;<\/p>\n<li>\u7b49\u5f85\u521d\u59cb\u5316\u5c31\u7eea&#xff1a;svcCtx.InitFetchDataState.Wait()&#xff0c;\u8fd9\u4e00\u6b65\u4e5f\u662fvss\u9879\u76ee\u4e2d\u6240\u6709\u670d\u52a1\u7684\u6570\u636e\u4f9d\u8d56<\/li>\n<li>\u521b\u5efa gosip server&#xff1a;gosip.NewServer(&#8230;)<\/li>\n<li>\u6ce8\u518c\u6bcf\u4e2a SIP \u65b9\u6cd5\u7684\u56de\u8c03&#xff1a;sipSvr.OnRequest(key, item)<\/li>\n<li>\u5f00\u59cb\u76d1\u542c&#xff1a;sipSvr.Listen(network, addr)&#xff0c;\u5e76\u5199\u56de svcCtx.GBSUDPSev\/GBSTCPSev<\/li>\n<p>\u8282\u9009\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">var<\/span> <span class=\"token punctuation\">(<\/span><br \/>\nsipSvr <span class=\"token operator\">&#061;<\/span> gosip<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewServer<\/span><span class=\"token punctuation\">(<\/span>gosip<span class=\"token punctuation\">.<\/span>ServerConfig<span class=\"token punctuation\">{<\/span>Host<span class=\"token punctuation\">:<\/span> s<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>Config<span class=\"token punctuation\">.<\/span>InternalIp<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">NewLogger<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\naddr   <span class=\"token operator\">&#061;<\/span> fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s:%d&#034;<\/span><span class=\"token punctuation\">,<\/span> s<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>Config<span class=\"token punctuation\">.<\/span>Host<span class=\"token punctuation\">,<\/span> s<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>Config<span class=\"token punctuation\">.<\/span>Sip<span class=\"token punctuation\">.<\/span>Port<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> key<span class=\"token punctuation\">,<\/span> item <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">range<\/span> handlers <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">if<\/span> err <span class=\"token operator\">:&#061;<\/span> sipSvr<span class=\"token punctuation\">.<\/span><span class=\"token function\">OnRequest<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nfunctions<span class=\"token punctuation\">.<\/span><span class=\"token function\">LogError<\/span><span class=\"token punctuation\">(<\/span>fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Sip GBS Request [%S] err: %s&#034;<\/span><span class=\"token punctuation\">,<\/span> key<span class=\"token punctuation\">,<\/span> err<span class=\"token punctuation\">.<\/span><span class=\"token function\">Error<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> err <span class=\"token operator\">:&#061;<\/span> sipSvr<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">string<\/span><span class=\"token punctuation\">(<\/span>networkType<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">panic<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> networkType <span class=\"token operator\">&#061;&#061;<\/span> SipTCP <span class=\"token punctuation\">{<\/span><br \/>\ns<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>GBSTCPSev <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>sipSvr<br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\ns<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>GBSUDPSev <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>sipSvr<br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h4>2.2 RegisterHandlers&#xff1a;\u628a SIP \u65b9\u6cd5\u8def\u7531\u5230\u4e1a\u52a1\u903b\u8f91<\/h4>\n<p>core\/app\/sev\/vss\/internal\/handler\/gbs_sip\/routers.go \u5b9a\u4e49\u4e86\u8def\u7531\u8868\u3002\u4ee5 INVITE \u4e3a\u4f8b&#xff1a;<\/p>\n<p>sip<span class=\"token punctuation\">.<\/span>INVITE<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>req sip<span class=\"token punctuation\">.<\/span>Request<span class=\"token punctuation\">,<\/span> tx sip<span class=\"token punctuation\">.<\/span>ServerTransaction<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nsip2<span class=\"token punctuation\">.<\/span><span class=\"token function\">DO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;GBS&#034;<\/span><span class=\"token punctuation\">,<\/span> svcCtx<span class=\"token punctuation\">,<\/span> req<span class=\"token punctuation\">,<\/span> tx<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">nil<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span>gbssip<span class=\"token punctuation\">.<\/span>InviteLogic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>\u8fd9\u610f\u5473\u7740&#xff1a;gosip \u6536\u5230 INVITE \u540e&#xff0c;\u4f1a\u8fdb\u5165 sip2.DO&#xff0c;\u6700\u7ec8\u7531 InviteLogic.DO() \u5904\u7406\u4e1a\u52a1\u3002<\/p>\n<hr \/>\n<h3>3. \u5165\u7ad9 INVITE&#xff08;\u8bbe\u5907 -&gt; VSS&#xff09;&#xff1a;InviteLogic \u54cd\u5e94 200OK &#043; SDP<\/h3>\n<p>\u5165\u7ad9 INVITE \u7684\u5904\u7406\u94fe\u8def\u53ef\u4ee5\u6309\u201c\u5305\u88c5\u5c42 &#043; \u4e1a\u52a1\u5c42\u201d\u62c6\u5f00&#xff1a;<\/p>\n<li>gosip \u89e6\u53d1 handler&#xff1a;OnRequest(sip.INVITE, handler)<\/li>\n<li>sip2.DO(&#8230;) \u505a\u901a\u7528\u5904\u7406&#xff08;\u89e3\u6790\u8bf7\u6c42\u3001\u9ed1\u540d\u5355\u6821\u9a8c\u3001\u9519\u8bef\u8bed\u4e49\u3001\u7edf\u4e00\u54cd\u5e94\u7b56\u7565&#xff09;<\/li>\n<li>\u8c03\u7528 InviteLogic.DO() \u5b9e\u73b0 INVITE \u7684\u5177\u4f53\u4e1a\u52a1&#xff08;\u89e3\u6790 SDP\u3001\u6821\u9a8c\u3001\u5206\u914d\u7aef\u53e3\u3001\u56de\u5305&#xff09;<\/li>\n<hr \/>\n<h4>3.1 \u7edf\u4e00\u5165\u53e3&#xff1a;sip2.DO \u600e\u4e48\u628a sip.Request \u53d8\u6210\u4f60\u4eec\u7684 types.Request<\/h4>\n<p>\u5728 core\/app\/sev\/vss\/internal\/pkg\/sip\/sip_handler.go \u4e2d&#xff0c;DO() \u505a\u4e86\u8fd9\u4e9b\u5173\u952e\u4e8b\u60c5&#xff1a;<\/p>\n<ul>\n<li>\u8c03\u7528 ParseToRequest(h.req) \u89e3\u6790 From\u3001Source\u3001Body\u3001Via \u7b49\u4fe1\u606f&#xff0c;\u751f\u6210 *types.Request<\/li>\n<li>\u7ef4\u62a4\u65e5\u5fd7&#xff1a;\u5199\u5165 svcCtx.SipLog<\/li>\n<li>\u8d85\u65f6\u63a7\u5236&#xff1a;context.WithTimeout(&#8230;, svcCtx.Config.Timeout)<\/li>\n<li>\u8c03\u7528\u4e1a\u52a1\u903b\u8f91&#xff1a;h.logic.New(ctx, h.svcCtx, data, h.tx).DO()<\/li>\n<li>\u6839\u636e types.Response \u51b3\u5b9a\u662f\u5426\u54cd\u5e94\u3001\u5982\u4f55\u54cd\u5e94<\/li>\n<\/ul>\n<p>ParseToRequest \u7684\u5173\u952e\u70b9\u5728 core\/app\/sev\/vss\/internal\/pkg\/sip\/utils.go&#xff1a;<\/p>\n<ul>\n<li>ID \u6765\u81ea req.From().Address.User().String()<\/li>\n<li>TransportProtocol \u4ece ViaHop.Transport \u63a8\u65ad&#xff08;UDP\/TCP \u7b49&#xff09;<\/li>\n<li>Body \u5c31\u662f req.Body()&#xff08;INVITE \u7684 SDP \u6b63\u5728\u8fd9\u91cc&#xff09;<\/li>\n<\/ul>\n<hr \/>\n<h4>3.2 \u4e1a\u52a1\u5c42&#xff1a;InviteLogic.DO() \u505a\u4e86\u4ec0\u4e48<\/h4>\n<p>\u5165\u7ad9 INVITE \u7684\u6838\u5fc3\u4ee3\u7801\u5728 core\/app\/sev\/vss\/internal\/logic\/gbs_sip\/invite.go&#xff0c;\u5b83\u7684\u6d41\u7a0b\u53ef\u4ee5\u6982\u62ec\u4e3a&#xff1a;<\/p>\n<li>\u89e3\u6790 SDP&#xff1a;\n<ul>\n<li>sdpInfo, err :&#061; sdp.ParseString(l.req.Original.Body())<\/li>\n<li>\u68c0\u67e5 len(sdpInfo.Media) &gt; 0<\/li>\n<\/ul>\n<\/li>\n<li>\u6821\u9a8c\u8bf7\u6c42\u662f\u5426\u5408\u6cd5&#xff1a;\n<ul>\n<li>\u901a\u8fc7 l.req.ID \u53bb svcCtx.TalkSipData \u7684 key \u91cc\u67e5\u627e\u5339\u914d&#xff08;\u907f\u514d\u201c\u672a\u77e5\u5bf9\u8bb2\u4f1a\u8bdd\u201d\u88ab\u9519\u8bef\u542f\u52a8&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u5206\u914d\u672c\u5730\u7aef\u53e3&#xff1a;\n<ul>\n<li>usablePort :&#061; common.UsablePort(l.svcCtx)<\/li>\n<li>\u8fd9\u91cc\u4f1a\u8df3\u8fc7\u5f53\u524d\u6b63\u5728\u5360\u7528\u7684\u7aef\u53e3&#xff0c;\u5e76\u68c0\u67e5\u7cfb\u7edf\u53ef\u7528\u6027<\/li>\n<\/ul>\n<\/li>\n<li>\u76f4\u63a5\u7528 ServerTransaction \u56de 200OK &#043; SDP&#xff1a;\n<ul>\n<li>sip2.NewGBSSender(&#8230;).InviteSDPResponse(l.tx, sdpInfo, usablePort)<\/li>\n<li>\u8fd9\u4e00\u6b65\u4f1a\u8c03\u7528 tx.Respond(resp) \u628a\u54cd\u5e94\u53d1\u56de\u53bb<\/li>\n<\/ul>\n<\/li>\n<li>\u5199\u5165 RTP \u8fde\u63a5\u4fe1\u606f&#xff08;\u4f9b\u540e\u7eed\u97f3\u9891 RTP \u53d1\u9001\/\u63a5\u6536\u4f7f\u7528&#xff09;&#xff1a;\n<ul>\n<li>common.SetTalkRtpConnInfo(svcCtx, sdpInfo, talkSipKey, usablePort)<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de **Ignore: true**\u2757\u2757\u2757&#xff1a;\n<ul>\n<li>\u8868\u793a\u201c\u54cd\u5e94\u5df2\u7ecf\u5728 InviteSDPResponse \u91cc\u5b8c\u6210\u4e86\u201d&#xff0c;\u4e0d\u8981\u8ba9 sip2.DO \u7ee7\u7eed\u518d\u505a\u4e00\u5c42\u9ed8\u8ba4 OK \u56de\u5305<\/li>\n<\/ul>\n<\/li>\n<p>\u5982\u679c\u4f60\u60f3\u5feb\u901f\u7406\u89e3\u4e3a\u4ec0\u4e48\u5165\u7ad9 INVITE \u5fc5\u987b\u5148\u56de SDP \u518d\u5199\u7f13\u5b58&#xff0c;\u53ef\u4ee5\u91cd\u70b9\u770b common.SetTalkRtpConnInfo&#xff08;core\/app\/sev\/vss\/internal\/pkg\/common\/talk.go&#xff09;\u505a\u4e86\u8fd9\u4e9b\u4e8b&#xff1a;<\/p>\n<ul>\n<li>\u4ece SDP \u7684 Media[0] \/ Media[].Formats[] \u4e2d\u63a8\u5bfc\u97f3\u9891 codec&#xff1a;PCMA \/ PCMU \/ AAC \u5bf9\u5e94 payloadType \u4e0e sampleRate<\/li>\n<li>\u4ece SDP \u7684 SSRC&#xff08;\u6709\u4e9b\u8bbe\u5907\u5e26\u524d\u7f00\u65f6\u4f1a\u88c1\u526a&#xff09;\u89e3\u6790\u51fa\u6570\u5b57\u578b SSRC&#xff0c;\u5e76\u5199\u5165\u7f13\u5b58<\/li>\n<li>\u628a\u672c\u6b21\u53ef\u7528\u7aef\u53e3 usablePort \u5199\u5165 RTPUsablePort&#xff0c;\u5e76\u8ba1\u7b97 RTPRtpPort\/RTPRtcpPort \u7684\u5bf9\u5e94\u5173\u7cfb<\/li>\n<li>\u628a sdpInfo.Connection.Address \u5199\u5165 RTPRemoteIP&#xff0c;\u4e3a\u540e\u7eed RTP \u901a\u4fe1\u51c6\u5907\u201c\u5bf9\u7aef IP &#043; \u672c\u7aef\u7aef\u53e3\u201d<\/li>\n<\/ul>\n<p>\u201c\u5148\u81ea\u5b9a\u4e49\u54cd\u5e94&#xff0c;\u518d\u8fd4\u56de Ignore\u201d\u7684\u6a21\u5f0f\u5728 InviteLogic \u91cc\u662f\u660e\u786e\u5b58\u5728\u7684&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u56de\u590dinvite 200OK<\/span><br \/>\n<span class=\"token keyword\">if<\/span> err <span class=\"token operator\">:&#061;<\/span> sip2<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewGBSSender<\/span><span class=\"token punctuation\">(<\/span>l<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">,<\/span> l<span class=\"token punctuation\">.<\/span>req<span class=\"token punctuation\">,<\/span> l<span class=\"token punctuation\">.<\/span>req<span class=\"token punctuation\">.<\/span>ID<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">InviteSDPResponse<\/span><span class=\"token punctuation\">(<\/span>l<span class=\"token punctuation\">.<\/span>tx<span class=\"token punctuation\">,<\/span> sdpInfo<span class=\"token punctuation\">,<\/span> usablePort<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&amp;<\/span>types<span class=\"token punctuation\">.<\/span>Response<span class=\"token punctuation\">{<\/span>Error<span class=\"token punctuation\">:<\/span> types<span class=\"token punctuation\">.<\/span><span class=\"token function\">NewErr<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">.<\/span><span class=\"token function\">Error<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token operator\">&#8230;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&amp;<\/span>types<span class=\"token punctuation\">.<\/span>Response<span class=\"token punctuation\">{<\/span>Ignore<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h4>3.3 \u5165\u7ad9 INVITE \u65f6\u5e8f\u56fe&#xff08;\u8bbe\u5907 -&gt; VSS GBS&#xff09;<\/h4>\n<p>\u6ce8\u610f\u533a\u5206GBS\u4e0eGBC\u7684\u533a\u522b<\/p>\n<p>     GBSSender (InviteSDPResponse)<\/p>\n<p>     InviteLogic<\/p>\n<p>     VSS GBS (gosip.Server)<\/p>\n<p>     \u8bbe\u5907<\/p>\n<p>      GBSSender (InviteSDPResponse)<\/p>\n<p>      InviteLogic<\/p>\n<p>      VSS GBS (gosip.Server)<\/p>\n<p>      \u8bbe\u5907<\/p>\n<p>  #mermaid-svg-8HKYHt8fbhj1cmht{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-8HKYHt8fbhj1cmht .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-8HKYHt8fbhj1cmht .error-icon{fill:#552222;}#mermaid-svg-8HKYHt8fbhj1cmht .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-8HKYHt8fbhj1cmht .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-8HKYHt8fbhj1cmht .marker{fill:#333333;stroke:#333333;}#mermaid-svg-8HKYHt8fbhj1cmht .marker.cross{stroke:#333333;}#mermaid-svg-8HKYHt8fbhj1cmht svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-8HKYHt8fbhj1cmht p{margin:0;}#mermaid-svg-8HKYHt8fbhj1cmht .actor{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-8HKYHt8fbhj1cmht text.actor&gt;tspan{fill:black;stroke:none;}#mermaid-svg-8HKYHt8fbhj1cmht .actor-line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);}#mermaid-svg-8HKYHt8fbhj1cmht .innerArc{stroke-width:1.5;stroke-dasharray:none;}#mermaid-svg-8HKYHt8fbhj1cmht .messageLine0{stroke-width:1.5;stroke-dasharray:none;stroke:#333;}#mermaid-svg-8HKYHt8fbhj1cmht .messageLine1{stroke-width:1.5;stroke-dasharray:2,2;stroke:#333;}#mermaid-svg-8HKYHt8fbhj1cmht #arrowhead path{fill:#333;stroke:#333;}#mermaid-svg-8HKYHt8fbhj1cmht .sequenceNumber{fill:white;}#mermaid-svg-8HKYHt8fbhj1cmht #sequencenumber{fill:#333;}#mermaid-svg-8HKYHt8fbhj1cmht #crosshead path{fill:#333;stroke:#333;}#mermaid-svg-8HKYHt8fbhj1cmht .messageText{fill:#333;stroke:none;}#mermaid-svg-8HKYHt8fbhj1cmht .labelBox{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-8HKYHt8fbhj1cmht .labelText,#mermaid-svg-8HKYHt8fbhj1cmht .labelText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-8HKYHt8fbhj1cmht .loopText,#mermaid-svg-8HKYHt8fbhj1cmht .loopText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-8HKYHt8fbhj1cmht .loopLine{stroke-width:2px;stroke-dasharray:2,2;stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);}#mermaid-svg-8HKYHt8fbhj1cmht .note{stroke:#aaaa33;fill:#fff5ad;}#mermaid-svg-8HKYHt8fbhj1cmht .noteText,#mermaid-svg-8HKYHt8fbhj1cmht .noteText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-8HKYHt8fbhj1cmht .activation0{fill:#f4f4f4;stroke:#666;}#mermaid-svg-8HKYHt8fbhj1cmht .activation1{fill:#f4f4f4;stroke:#666;}#mermaid-svg-8HKYHt8fbhj1cmht .activation2{fill:#f4f4f4;stroke:#666;}#mermaid-svg-8HKYHt8fbhj1cmht .actorPopupMenu{position:absolute;}#mermaid-svg-8HKYHt8fbhj1cmht .actorPopupMenuPanel{position:absolute;fill:#ECECFF;box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);filter:drop-shadow(3px 5px 2px rgb(0 0 0 \/ 0.4));}#mermaid-svg-8HKYHt8fbhj1cmht .actor-man line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-8HKYHt8fbhj1cmht .actor-man circle,#mermaid-svg-8HKYHt8fbhj1cmht line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;stroke-width:2px;}#mermaid-svg-8HKYHt8fbhj1cmht :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>   INVITE (SDP in body)<\/p>\n<p>   handler(sip.INVITE) &#043; ServerTransaction tx<\/p>\n<p>   Parse SDP &#043; \u6821\u9a8c talkSipKey(\u8bed\u97f3\u5bf9\u8bb2\u53ef\u9009)<\/p>\n<p>   InviteSDPResponse(tx, sdpInfo, usablePort)<\/p>\n<p>   tx.Respond(200OK &#043; SDP)<\/p>\n<p>   SetTalkRtpConnInfo(\u672c\u5730\u7aef\u53e3\/ssrc\/codec\/rtp\u8fde\u63a5\u4fe1\u606f)(\u8bed\u97f3\u5bf9\u8bb2\u53ef\u9009)<\/p>\n<p>   200OK &#043; SDP<\/p>\n<hr \/>\n<h3>4. \u51fa\u7ad9 INVITE&#xff08;VSS -&gt; \u8bbe\u5907&#xff09;&#xff1a;VideoLiveInvite &#043; ACK<\/h3>\n<p>\u51fa\u7ad9 INVITE \u6ca1\u6709\u8d70 InviteLogic&#xff08;\u56e0\u4e3a InviteLogic \u662f\u670d\u52a1\u7aef\u63a5\u6536 INVITE \u7684 handler&#xff09;\u3002\u51fa\u7ad9 INVITE \u7684\u89e6\u53d1\u94fe\u8def\u662f&#xff1a;<\/p>\n<li>\u5916\u90e8 HTTP \u89e6\u53d1\u201c\u62c9\u6d41\/\u56de\u653e\u201d\u5165\u53e3&#xff08;\u4f8b\u5982 video_live_invite.go&#xff09;<\/li>\n<li>\u628a\u201c\u9700\u8981\u53d1\u8d77 INVITE \u7684\u53c2\u6570\u201d\u6295\u9012\u5230 svcCtx.SipSendVideoLiveInvite channel<\/li>\n<li>gbs_proc.SendLogic \u5faa\u73af\u6d88\u8d39\u8be5 channel<\/li>\n<li>SendLogic.VideoLiveInvite \u8c03\u7528 sip2.NewGBSSender(&#8230;).VideoLiveInvite(req)<\/li>\n<li>GBSSender.VideoLiveInvite \u6784\u5efa INVITE \u7684 SDP \u5e76\u901a\u8fc7 gosip \u7684 RequestWithContext \u53d1\u8d77\u8bf7\u6c42<\/li>\n<li>\u6536\u5230\u54cd\u5e94\u540e\u89e3\u6790 SDP&#xff0c;\u5e76\u6784\u5efa ACK \u518d\u53d1\u4e00\u6b21<\/li>\n<hr \/>\n<h4>4.1 \u89e6\u53d1\u70b9&#xff1a;HTTP \u903b\u8f91\u5982\u4f55\u6295\u9012 SipSendVideoLiveInvite<\/h4>\n<p>HTTP \u5165\u53e3\u5728 core\/app\/sev\/vss\/internal\/logic\/http\/gbs\/video_live_invite.go\u3002\u5728\u51c6\u5907\u597d stream\/media server \u4fe1\u606f\u540e&#xff0c;\u4f1a\u505a&#xff1a;<\/p>\n<p>l<span class=\"token punctuation\">.<\/span>svcCtx<span class=\"token punctuation\">.<\/span>SipSendVideoLiveInvite <span class=\"token operator\">&lt;-<\/span> <span class=\"token operator\">&amp;<\/span>types<span class=\"token punctuation\">.<\/span>SipVideoLiveInviteMessage<span class=\"token punctuation\">{<\/span><br \/>\n     StreamPort<span class=\"token punctuation\">:<\/span>     streamRes<span class=\"token punctuation\">.<\/span>StreamPort<span class=\"token punctuation\">,<\/span><br \/>\n     MediaTransMode<span class=\"token punctuation\">:<\/span> streamRes<span class=\"token punctuation\">.<\/span>TransportProtocol<span class=\"token punctuation\">.<\/span>MediaTransMode<span class=\"token punctuation\">,<\/span><br \/>\n     MediaServerUrl<span class=\"token punctuation\">:<\/span> streamRes<span class=\"token punctuation\">.<\/span>MediaServerUrl<span class=\"token punctuation\">,<\/span><br \/>\n     MediaServerIP<span class=\"token punctuation\">:<\/span>  msIP<span class=\"token punctuation\">,<\/span><br \/>\n     MediaServerPort<span class=\"token punctuation\">:<\/span> streamRes<span class=\"token punctuation\">.<\/span>MSNode<span class=\"token punctuation\">.<\/span>HttpPort<span class=\"token punctuation\">,<\/span><br \/>\n     StreamName<span class=\"token punctuation\">:<\/span>     streamName<span class=\"token punctuation\">,<\/span><br \/>\n     PlayType<span class=\"token punctuation\">:<\/span>       args<span class=\"token punctuation\">.<\/span>PlayType<span class=\"token punctuation\">,<\/span><br \/>\n     ChannelUniqueId<span class=\"token punctuation\">:<\/span> args<span class=\"token punctuation\">.<\/span>ChannelItem<span class=\"token punctuation\">.<\/span>UniqueId<span class=\"token punctuation\">,<\/span><br \/>\n     DeviceUniqueId<span class=\"token punctuation\">:<\/span>  args<span class=\"token punctuation\">.<\/span>DeviceUniqueId<span class=\"token punctuation\">,<\/span><br \/>\n     Req<span class=\"token punctuation\">:<\/span>             sipReqRes<span class=\"token punctuation\">.<\/span>Req<span class=\"token punctuation\">,<\/span><br \/>\n     TransportProtocol<span class=\"token punctuation\">:<\/span> args<span class=\"token punctuation\">.<\/span>DeviceItem<span class=\"token punctuation\">.<\/span><span class=\"token function\">TransportProtocol<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n     Download<span class=\"token punctuation\">:<\/span> args<span class=\"token punctuation\">.<\/span>Download<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h4>4.2 SendLogic.VideoLiveInvite&#xff1a;\u4e3b\u52a8\u53d1 INVITE&#xff0c;\u5e76\u5728\u54cd\u5e94\u540e\u53d1 ACK<\/h4>\n<p>\u6838\u5fc3\u5728 core\/app\/sev\/vss\/internal\/logic\/gbs_proc\/send_sip_proc.go \u7684 VideoLiveInvite&#xff1a;<\/p>\n<p>\u63e1\u624b\u987a\u5e8f\u5de5\u4f5c&#xff1a;<\/p>\n<ul>\n<li>invite -&gt; ack(from to tag callid) -&gt; info(&#8230;) -&gt; notify(&#8230;) -&gt; bye<\/li>\n<\/ul>\n<p>\u5176\u4e2d\u6700\u4e0e gosip \u76f4\u63a5\u76f8\u5173\u7684\u662f INVITE\/ACK \u4e24\u6b65&#xff1a;<\/p>\n<li>INVITE&#xff1a;\n<ul>\n<li>inviteData, inviteRes, err :&#061; sip2.NewGBSSender(&#8230;).VideoLiveInvite(req)<\/li>\n<li>\u8981\u68c0\u67e5\u6210\u529f inviteRes.StatusCode() &#xff08;\u9879\u76ee\u91cc\u5141\u8bb8 &lt;&#061; 200&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>ACK&#xff1a;\n<ul>\n<li>ackData, err :&#061; sip2.NewGBSSender(&#8230;).AckReq(inviteRes)<\/li>\n<li>sip2.NewGBSSender(&#8230;).SendDirect(ackData) \u628a ACK \u53d1\u51fa\u53bb<\/li>\n<\/ul>\n<\/li>\n<p>\u7d27\u63a5\u7740\u5b83\u4f1a\u628a\u54cd\u5e94 SDP \u518d\u89e3\u6790\u4e00\u904d&#xff0c;\u7136\u540e\u542f\u52a8 RTP \u76f8\u5173\u6d41\u7a0b&#xff08;ms.New(&#8230;).ACKRtpPub(&#8230;)&#xff09;\u3002\u5176\u4e2d\u6700\u5173\u952e\u7684\u8f93\u5165\u662f&#xff1a;<\/p>\n<ul>\n<li>sdpInfo.Media[0].Port&#xff1a;RTP \u7aef\u53e3<\/li>\n<li>sdpInfo.Connection.Address&#xff1a;\u8fdc\u7aef IP<\/li>\n<li>filesize&#xff1a;\u4ece SDP \u7684 attributes \u91cc\u63d0\u53d6&#xff08;\u7528\u4e8e\u540e\u7eed RTP\/\u4e0b\u8f7d\u63a7\u5236\u7b49&#xff09;<\/li>\n<\/ul>\n<hr \/>\n<h4>4.3 GBSSender.VideoLiveInvite&#xff1a;\u5982\u4f55\u6784\u9020 INVITE &#043; SDP<\/h4>\n<p>core\/app\/sev\/vss\/internal\/pkg\/sip\/gbs_send.go \u4e2d&#xff0c;VideoLiveInvite() \u4f1a&#xff1a;<\/p>\n<li>\u7ec4\u88c5 SIP \u5934&#xff1a;\n<ul>\n<li>Via \/ From \/ To \/ Call-ID \/ User-Agent<\/li>\n<li>CSeq: INVITE<\/li>\n<li>Content-Type: Application\/SDP<\/li>\n<\/ul>\n<\/li>\n<li>\u751f\u6210 SDP&#xff1a;\n<ul>\n<li>video media&#xff08;PS\/MPEG4\/H264\/H265&#xff09;<\/li>\n<li>Connection\/Origin \u4f7f\u7528 MediaServerIP\u3001ChannelUniqueId\u3001\u672c\u5730 Sip.ID \u7b49<\/li>\n<li>\u6839\u636e PlayType \u51b3\u5b9a\u662f\u5426\u8d70 playback \u5206\u652f&#xff0c;\u5e76\u8bbe\u7f6e Subject header<\/li>\n<\/ul>\n<\/li>\n<li>makeRequest(sip.INVITE, headers, body) \u6784\u9020 sip.Request<\/li>\n<li>l.Send(request) \u89e6\u53d1 gosip \u7684\u51fa\u7ad9\u4e8b\u52a1<\/li>\n<p>\u5176\u4e2d l.Send() \u662f\u8fd9\u6837\u9009 transport server \u7684&#xff08;\u7b80\u5316\u63cf\u8ff0&#xff09;&#xff1a;<\/p>\n<ul>\n<li>l.req.TransportProtocol &#061;&#061; &#034;UDP&#034; -&gt; \u8c03 GBSUDPSev.RequestWithContext<\/li>\n<li>\u5426\u5219 -&gt; \u8c03 GBSTCPSev.RequestWithContext<\/li>\n<\/ul>\n<hr \/>\n<h4>4.4 \u51fa\u7ad9 INVITE \u65f6\u5e8f\u56fe&#xff08;VSS -&gt; \u8bbe\u5907&#xff09;<\/h4>\n<p>     Device<\/p>\n<p>     GBSSender &#043; gosip client transaction<\/p>\n<p>     SendLogic.VideoLiveInvite<\/p>\n<p>     SipSendVideoLiveInvite Channel<\/p>\n<p>     HTTP\/WS \u63a5\u53e3<\/p>\n<p>      Device<\/p>\n<p>      GBSSender &#043; gosip client transaction<\/p>\n<p>      SendLogic.VideoLiveInvite<\/p>\n<p>      SipSendVideoLiveInvite Channel<\/p>\n<p>      HTTP\/WS \u63a5\u53e3<\/p>\n<p>  #mermaid-svg-7KxZiS93y5XzqJPY{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-7KxZiS93y5XzqJPY .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-7KxZiS93y5XzqJPY .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-7KxZiS93y5XzqJPY .error-icon{fill:#552222;}#mermaid-svg-7KxZiS93y5XzqJPY .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-7KxZiS93y5XzqJPY .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-7KxZiS93y5XzqJPY 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.loopLine{stroke-width:2px;stroke-dasharray:2,2;stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);}#mermaid-svg-7KxZiS93y5XzqJPY .note{stroke:#aaaa33;fill:#fff5ad;}#mermaid-svg-7KxZiS93y5XzqJPY .noteText,#mermaid-svg-7KxZiS93y5XzqJPY .noteText&gt;tspan{fill:black;stroke:none;}#mermaid-svg-7KxZiS93y5XzqJPY .activation0{fill:#f4f4f4;stroke:#666;}#mermaid-svg-7KxZiS93y5XzqJPY .activation1{fill:#f4f4f4;stroke:#666;}#mermaid-svg-7KxZiS93y5XzqJPY .activation2{fill:#f4f4f4;stroke:#666;}#mermaid-svg-7KxZiS93y5XzqJPY .actorPopupMenu{position:absolute;}#mermaid-svg-7KxZiS93y5XzqJPY .actorPopupMenuPanel{position:absolute;fill:#ECECFF;box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);filter:drop-shadow(3px 5px 2px rgb(0 0 0 \/ 0.4));}#mermaid-svg-7KxZiS93y5XzqJPY .actor-man line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;}#mermaid-svg-7KxZiS93y5XzqJPY .actor-man circle,#mermaid-svg-7KxZiS93y5XzqJPY line{stroke:hsl(259.6261682243, 59.7765363128%, 87.9019607843%);fill:#ECECFF;stroke-width:2px;}#mermaid-svg-7KxZiS93y5XzqJPY :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>   \u6295\u9012 SipVideoLiveInviteMessage<\/p>\n<p>   \u6d88\u8d39\u6d88\u606f<\/p>\n<p>   \u6784\u9020 INVITE (headers &#043; SDP) \u5e76 RequestWithContext<\/p>\n<p>   INVITE (SDP)<\/p>\n<p>   200OK (SDP in response body)<\/p>\n<p>   inviteRes \u8fd4\u56de<\/p>\n<p>   AckReq(inviteRes) &#043; SendDirect(ACK)<\/p>\n<p>   ACK<\/p>\n<p>   \u542f\u52a8 RTP \u63a8\/\u63a5\u5165&#xff08;ms.ACKRtpPub \u7b49&#xff09;<\/p>\n<hr \/>\n<h3>5. \u54ea\u4e9b\u5b57\u6bb5\u5fc5\u987b\u4fdd\u6301\u4e00\u81f4 \u2757\u2757\u2757\u2757\u2757\u2757\u2757\u2757\u2757\u2757<\/h3>\n<p>\u5728 send_sip_proc.go \u91cc\u6709\u975e\u5e38\u5173\u952e\u7684\u70b9&#xff1a;<\/p>\n<p>invite -&gt; ack(from to tag callid) -&gt; notify(&#8230;) -&gt; bye<\/p>\n<p>\u4eceack\u5f00\u59cb from to tag callid\u5230\u540e\u7eed\u6d41\u7a0b\u8fd9\u51e0\u4e2a\u503c\u9700\u8981\u4fdd\u6301\u4e00\u81f4<\/p>\n<p>\u53c2\u8003\u4ee3\u7801 \u70b9\u51fb\u76f4\u8fbe core\/app\/sev\/vss\/internal\/logic\/gbs_proc\/send_sip_proc.go:260<\/p>\n<p>\u7ed3\u5408 GBSSender.AckReq(resp sip.Response) \u7684\u5b9e\u73b0&#xff0c;\u53ef\u4ee5\u770b\u51fa ACK \u4f9d\u8d56\u54cd\u5e94\u91cc\u7684&#xff1a;<\/p>\n<ul>\n<li>Call-ID&#xff1a;\u4ece inviteRes.CallID() \u63d0\u53d6<\/li>\n<li>To\/From&#xff1a;\u4ece inviteRes.To() \/ inviteRes.From() \u53d6\u56de<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u5f53\u9700\u8981\u6269\u5c55\u66f4\u591a SIP \u65b9\u6cd5&#xff08;\u6bd4\u5982\u8865\u9f50 catalog\/notify\/broadcast \u6216\u8005\u589e\u52a0 talk \u5b8c\u6574\u7248\u6d41\u7a0b&#xff09;\u65f6&#xff0c;\u52a1\u5fc5\u4ece&#xff1a;<\/p>\n<ul>\n<li>\u53d1\u8d77\u65b9\u6784\u9020\u7684\u8bf7\u6c42\u5934\u5b57\u6bb5<\/li>\n<li>\u54cd\u5e94\u65b9\u56de\u6765\u7684 To\/From\/Call-ID\/CSeq<\/li>\n<\/ul>\n<p>\u6ce8\u610f\u8fd9\u4e24\u7aef\u505a\u5b57\u6bb5\u5bf9\u9f50<\/p>\n<hr \/>\n<h3>6. \u9605\u8bfb\u4ee3\u7801\u7684\u63a8\u8350\u8def\u7ebf&#xff0c;\u6700\u5feb\u628a\u63e1 gosip \u96c6\u6210\u65b9\u5f0f<\/h3>\n<p>\u5982\u679c\u4f60\u8981\u5feb\u901f\u7406\u89e3 VSS \u5982\u4f55\u4f7f\u7528 gosip&#xff0c;\u5efa\u8bae\u6309\u4e0b\u9762\u987a\u5e8f\u8bfb&#xff1a;<\/p>\n<li>core\/app\/sev\/vss\/main.go&#xff1a;\u670d\u52a1\u542f\u52a8\u4e0e\u9000\u51fa\u6d41\u7a0b<\/li>\n<li>core\/app\/sev\/vss\/internal\/server\/sip.go&#xff1a;gosip.NewServer &#043; Listen &#043; OnRequest<\/li>\n<li>core\/app\/sev\/vss\/internal\/handler\/gbs_sip\/routers.go&#xff1a;\u65b9\u6cd5\u8def\u7531\u8868&#xff08;INVITE -&gt; InviteLogic&#xff09;<\/li>\n<li>core\/app\/sev\/vss\/internal\/pkg\/sip\/sip_handler.go&#xff1a;sip2.DO \u901a\u7528\u89e3\u6790\/\u54cd\u5e94\u6846\u67b6<\/li>\n<li>core\/app\/sev\/vss\/internal\/logic\/gbs_sip\/invite.go&#xff1a;\u5165\u7ad9 INVITE \u7684\u4e1a\u52a1\u5b9e\u73b0<\/li>\n<li>core\/app\/sev\/vss\/internal\/logic\/http\/gbs\/video_live_invite.go&#xff1a;\u51fa\u7ad9 INVITE \u7684\u89e6\u53d1\u5165\u53e3<\/li>\n<li>core\/app\/sev\/vss\/internal\/logic\/gbs_proc\/send_sip_proc.go&#xff1a;\u51fa\u7ad9 INVITE &#043; ACK \u7684\u63e1\u624b\u7f16\u6392<\/li>\n<li>core\/app\/sev\/vss\/internal\/pkg\/sip\/gbs_send.go&#xff1a;INVITE\/ACK SDP \u4e0e header \u7684\u6784\u9020<\/li>\n<hr \/>\n<h3>7. \u6ce8\u610f\u4e8b\u9879<\/h3>\n<ul>\n<li>sip.INVITE \u7684\u5165\u7ad9\u573a\u666f\u4e0e GBSSender.VideoLiveInvite \u7684\u51fa\u7ad9\u573a\u666f\u533a\u5206\u6e05\u695a&#xff08;\u540c\u4e3a INVITE&#xff0c;\u4f46 SDP\/\u7f13\u5b58 key\/\u5a92\u4f53\u7c7b\u578b\u4e0d\u540c&#xff09;<\/li>\n<li>Ack \u540e\u7eed\u7684 RTP \u534f\u8bae\u5165\u53c2\u4e0e SDP \u4e2d\u7684 connection\/ssrc\/port\/codec \u505a\u4e00\u81f4\u6027\u6821\u9a8c&#xff08;\u907f\u514d\u95ee\u9898\u96be\u6392\u67e5&#xff09;<\/li>\n<li>GBC\u662f\u4fe1\u4ee4\u4e0b\u7ea7\u670d\u52a1\u5668 &#xff08;\u5e73\u53f0\u6216\u8005\u8bbe\u5907\u7aef&#xff09;\u5b9e\u9645\u4e0eGBS\u4f7f\u7528\u65b9\u5f0f\u5927\u4f53\u4e00\u81f4&#xff0c;\u9700\u8981\u6ce8\u610f\u7684\u662fGBC\u662f\u8bbe\u5907\u65b9&#xff0c;\u800cGBS\u662f\u4f5c\u4e3a\u4e0a\u7ea7\u4fe1\u4ee4\u670d\u52a1\u5668<\/li>\n<li>\u5982\u679c\u5728\u540c\u6837\u7684\u5de5\u7a0b\u7ed3\u6784\u91cc\u5b9e\u73b0\u5b8c\u6574\u7684\u4fe1\u4ee4\u670d\u52a1\u5668&#xff08;\u6bd4\u5982catalog \/ register \/ keepalive \/ bye \u7b49&#xff09;&#xff0c;\u9700\u8981\u4e25\u683c\u6309\u7167\u9879\u76ee\u7ed3\u6784\u6ce8\u518c\u8def\u7531\u7b49<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u7bc7\u4ee5 core\/app\/sev\/vss \u4e3a\u53c2\u7167&#xff0c;\u8bb2\u89e3VSS\u662f\u5982\u4f55\u63a5\u5165 github.com\/ghettovoice\/gosip&#xff0c;\u7528\u6765\u5b8c\u6210 SIP 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