{"id":1205,"date":"2026-02-22T11:25:17","date_gmt":"2026-02-22T03:25:17","guid":{"rendered":"https:\/\/www.myvoipapp.com\/cnblog\/?p=1205"},"modified":"2026-02-22T11:25:17","modified_gmt":"2026-02-22T03:25:17","slug":"keep-alive","status":"publish","type":"post","link":"https:\/\/www.myvoipapp.com\/cnblog\/2026\/02\/22\/keep-alive\/","title":{"rendered":"Keep-alive"},"content":{"rendered":"\n<p>\u5728 SIP \u901a\u4fe1\u9886\u57df\uff0ckeep-alive \uff08\u4fdd\u6d3b\uff09\u6709\u4e24\u79cd\uff1a\u8bbe\u5907\u7684 keep-alive \u4e0e\u4f1a\u8bdd\uff08session\uff0cdialog\uff09\u7684 keep-alive\u3002<\/p>\n\n\n\n<p>\u8bbe\u5907\u7684 keep-alive \u76ee\u524d\u5927\u5bb6\u90fd\u6709\u6210\u719f\u7edf\u4e00\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5e76\u4e14\u7b26\u5408 <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc3261\" target=\"_blank\" rel=\"noreferrer noopener\">RFC3261<\/a> \u7684\u8981\u6c42\uff0c\u90a3\u5c31\u662f\u91c7\u7528 OPTIONS \u64cd\u4f5c\u8fdb\u884c\u68c0\u6d4b\uff0c\u5982\u679c\u5bf9\u7aef\u8bbe\u5907\u8fd4\u56de 200OK \u5219\u8bf4\u660e\u8bbe\u5907 keep-alive\u3002\u7ec8\u7aef\u91c7\u7528 REGISTER \u4e5f\u53ef\u4ee5\u68c0\u6d4b\u8bbe\u5907 keep-alive\u3002<\/p>\n\n\n\n<p>\u5404\u5382\u5bb6\u4e00\u76f4\u90fd\u6ca1\u6709\u4f1a\u8bdd keep-alive \u7684\u7edf\u4e00\u89e3\u51b3\u65b9\u6848\u3002<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc4028\" target=\"_blank\" rel=\"noreferrer noopener\">RFC4028<\/a> \u89c4\u8303\u867d\u7136\u5b9a\u4e49\u4e86 reINVITE \u548c UPDATE \u7528\u4e8e\u4f1a\u8bdd keep-alive \u68c0\u6d4b\uff0c\u4f46\u662f\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u7528\u4e8e\u4f1a\u8bdd\u68c0\u6d4b\u663e\u5f97\u592a\u590d\u6742\u4e86\uff0c\u4f1a\u5bfc\u81f4\u91cd\u65b0\u534f\u5546\u5a92\u4f53\uff0c\u5f71\u54cd\u4f1a\u8bdd\u7684\u901a\u8bdd\u8d28\u91cf\u3002<\/p>\n\n\n\n<p>\u76ee\u524d\u5404\u5382\u5bb6\u7684\u601d\u8def\u5012\u662f\u57fa\u672c\u4e00\u81f4\uff1a\u65e2\u7136\u6b63\u5e38\u7684 reINVITE \u548c UPDATE \u64cd\u4f5c\u4f1a\u5bfc\u81f4\u65b0\u7684\u5a92\u4f53\u534f\u5546\uff0c\u90a3\u4e0d\u643a\u5e26 SDP \u662f\u4e0d\u662f\u5c31\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8e\u4f1a\u8bdd\u7684 keep-alive\uff1f\u5f53\u7136\uff0c reINVITE \u662f\u4f8b\u5916\uff0c\u300creINVITE without SDP\u300d\u5df2\u7ecf\u88ab\u7528\u4e8e 3PCC \u6d41\u7a0b\uff0c\u56e0\u6b64\u4e0d\u53ef\u80fd\u518d\u7528\u4e8e\u4f1a\u8bdd keep-alive \u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u6839\u636e\u5386\u5e74\u4e0e\u5404\u5382\u5bb6\u8bbe\u5907\u5bf9\u63a5\u7684\u7ecf\u9a8c\uff0c\u603b\u7ed3\u4ee5\u4e0b\u7528\u4e8e\u4f1a\u8bdd keep-alive \u7684\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UPDATE without SDP<\/li>\n\n\n\n<li>INFO without SDP<\/li>\n\n\n\n<li>MESSAGE without SDP<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u65b0\u7248\u672c miniSIPServer \u7684\u9ed8\u8ba4\u5904\u7406\u65b9\u5f0f\uff1a\u5982\u679c\u5728\u4f1a\u8bdd\u8fc7\u7a0b\u4e2d\u6536\u5230\u4e0a\u8ff0\u4e09\u79cd SIP \u6d88\u606f\uff0c\u5c06\u8fdb\u5165\u4f1a\u8bdd keep-alive \u5904\u7406\u6d41\u7a0b\uff1b\u5982\u679c\u4f1a\u8bdd\u5b58\u5728\uff0c\u5219\u8fd4\u56de 200OK \u6d88\u606f\u3002<\/p>\n\n\n\n<p>UPDATE \u548c INFO \u672c\u8eab\u5c31\u53ea\u80fd\u5728\u4f1a\u8bdd\u4e2d\u4f20\u9012\uff0c\u56e0\u6b64\u5929\u7136\u5951\u5408 keep-alive \u7684\u8981\u6c42\u3002\u6211\u4eec\u63a8\u8350\u4f18\u5148\u91c7\u7528 INFO\uff0cRFC3261 \u660e\u786e\u5b9a\u4e49\u4e86 INFO\uff0c\u5404\u5382\u5bb6\u8bbe\u5907\u4e00\u5b9a\u4f1a\u652f\u6301 INFO \u64cd\u4f5c\u3002\u800c UPDATE \u64cd\u4f5c\u5b9a\u4e49\u5728\u8865\u5145\u534f\u8bae\u4e2d\uff0c\u90e8\u5206\u5382\u5bb6\u7684\u8bbe\u5907\u672a\u5fc5\u4f1a\u652f\u6301 UPDATE\uff0c\u66f4\u9051\u8bba \u300cUPDATE without SDP\u300d\u3002<\/p>\n\n\n\n<p>MESSAGE \u5373\u53ef\u4ee5\u5728\u4f1a\u8bdd\u5185\u4f20\u9012\uff0c\u4e5f\u53ef\u4ee5\u5728\u4f1a\u8bdd\u5916\u53d1\u8d77\uff0c\u7528\u4e8e\u4f20\u9012\u5373\u65f6\u6d88\u606f\uff08instant message\uff09\u3002\u6211\u4eec\u9650\u5b9a \u300cMESSAGE without SDP\u300d\u53ea\u80fd\u5728\u4f1a\u8bdd\u5185\u4f20\u9012\uff0c\u5e76\u4fdd\u7559\u7ed9 keep-alive \u6d41\u7a0b\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 SIP \u901a\u4fe1\u9886\u57df\uff0ckeep-alive \uff08\u4fdd\u6d3b\uff09\u6709\u4e24\u79cd\uff1a\u8bbe\u5907\u7684 keep-alive \u4e0e\u4f1a\u8bdd\uff08session\uff0cdialog\uff09\u7684 keep-alive\u3002 \u8bbe\u5907&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.myvoipapp.com\/cnblog\/2026\/02\/22\/keep-alive\/\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105,106],"tags":[144,491,493,20,309,492],"class_list":["post-1205","post","type-post","status-publish","format-standard","hentry","category-minisipserver_cloud","category-minisipserver","tag-info","tag-keep-alive","tag-message","tag-sip","tag-update","tag-492"],"_links":{"self":[{"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/posts\/1205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/comments?post=1205"}],"version-history":[{"count":1,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/posts\/1205\/revisions"}],"predecessor-version":[{"id":1206,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/posts\/1205\/revisions\/1206"}],"wp:attachment":[{"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/media?parent=1205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/categories?post=1205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.myvoipapp.com\/cnblog\/wp-json\/wp\/v2\/tags?post=1205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}