【正文】 205 7 300 Multiple Choices......................................................................... 205 301 Moved Permanently ................................................................. 206 302 Moved Temporarily................................................................... 206 305 Use Proxy ..................................................................................... 207 380 Alternative Service ................................................................... 207 請求失敗 4xx .................................................................................................. 207 400 Bad Request ................................................................................ 207 401 Unauthorized .............................................................................. 207 402 Payment Required .................................................................... 208 403 Forbidden ..................................................................................... 208 404 Not Found .................................................................................... 208 405 Method Not Allowed ................................................................. 208 406 Not Acceptable ........................................................................... 208 407 Proxy Authentication Required ............................................ 208 408 Request Timeout ....................................................................... 209 410 Gone ............................................................................................ 209 413請求實體過大。 1 SIP: Session Initiation Protocol 2 目錄 SIP協(xié)議介紹 ............................................................................................................ 10 SIP協(xié)議功能概況 .................................................................................................... 10 術語 ............................................................................................................................ 12 實施概覽 .................................................................................................................... 12 協(xié)議的結構 ................................................................................................................ 22 協(xié)議的定義 ................................................................................................................ 24 SIP消息： ................................................................................................................ 32 7． 1 請求 .................................................................................................................... 33 7． 2應答 ..................................................................................................................... 34 頭域 ....................................................................................................................... 34 頭域格式。 ................................................................................................... 38 縮寫格式 ....................................................................................................... 38 ....................................................................................................................... 38 消息正文類型 (MessageBodyType) ...................................................... 39 消息體長度 ................................................................................................... 39 分幀的 SIP消息（ Framing SIP Messages） ............................................ 39 8 一般用戶代理行為 ....................................................................................................... 40 UAC特性 ............................................................................................................. 40 產生一個請求 ............................................................................................... 41 RequestURI ......................................................................................... 41 TO ............................................................................................................. 42 From ........................................................................................................ 43 CallID..................................................................................................... 43 Cseq ......................................................................................................... 44 MaxForwards ...................................................................................... 44 Via ............................................................................................................ 45 Contact ................................................................................................... 45 Supported 和 Require........................................................................ 46 附加信息部分 ........................................................................................ 46 發(fā)送一個請求 ............................................................................................... 47 處理應答 ....................................................................................................... 48 : transaction 層的錯誤 ......................................................................... 48 未知的應答 ............................................................................................... 48 Vias .......................................................................................................... 48 處理 3xx應答 ......................................................................................... 49 處理 4xx應答 ......................................................................................... 50 UAS特性 ............................................................................................................. 51 方法判定 ...................................