{"id":3816,"date":"2015-09-02T07:30:00","date_gmt":"2015-09-01T22:30:00","guid":{"rendered":"http:\/\/pchero21.com\/?p=3816"},"modified":"2015-09-02T07:30:00","modified_gmt":"2015-09-01T22:30:00","slug":"siprtp-initiation-bug","status":"publish","type":"post","link":"http:\/\/pchero21.com\/?p=3816","title":{"rendered":"SIP\/RTP initiation bug"},"content":{"rendered":"

\ub298 \uc788\ub294 \uc77c\uc774\uc5c8\uc9c0\ub9cc, \ud2b9\ubcc4\ud788 \ub354 \uc774\uc0c1\ud55c \uc77c\uc774\uc5c8\ub2e4. \ubd84\uba85\ud788 \ubc1c\uc0dd\ud558\ub294 \uc7a5\uc560\uc600\ub2e4. \ud558\uc9c0\ub9cc \ub298 \uadf8\ub7ac\ub4ef\uc774 \ubd88\uaddc\uce59\uc801\uc774\uc5c8\uace0, \uc7ac\ud604\uc774 \ubd88\uac00\ub2a5\ud558\uc600\ub2e4.<\/p>\n

\uc0ac\uac74\uc758 \ubc1c\uc0dd\uc740, \uace0\uac1d\uc0ac \uc911 \ud558\ub098\uc5d0\uc11c “\uc815\uc0c1\uc801\uc73c\ub85c \uc74c\uc131\uba54\uc2dc\uc9c0\ub97c \ub0a8\uaca8\ub3c4, \uc2e4\uc81c\ub85c \uc74c\uc131 \uba54\uc2dc\uc9c0\ub97c \ud50c\ub808\uc774 \ud560 \ub54c\ub294, \uc544\ubb34 \uc18c\ub9ac\uac00 \uc548\ub09c\ub2e4”\ub294 \uac83\uc774\uc5c8\ub2e4. \uac00\ubccd\uac8c \uc0dd\uac01\ud588\ub2e4. record \ud568\uc218\uc758 \uc798\ubabb\ub41c \uc0ac\uc6a9\uc774\ub098, \ub179\uc74c\ud560 \ub370\uc774\ud130\uac00 \uc5c6\uc5c8\uac70\ub098….<\/p>\n

 <\/p>\n

\uc77c\ub2e8, \ub85c\uadf8 \ud30c\uc77c\ubd80\ud130 \ud655\uc778\ud588\ub2e4.<\/p>\n

\/var\/log\/freeswitch\/freeswitch.log<\/p><\/blockquote>\n

\uba3c\uc800 \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud55c \ucf00\uc774\uc2a4\ub97c \ucd94\ub824\ub0b4\uace0, \uadf8 \ub2e4\uc74c, \uc815\uc0c1\uc801\uc778 \ucf00\uc774\uc2a4\uc758 \ub85c\uadf8\ub97c \ube44\uad50\ud574\ubcf4\uc558\ub2e4. \ubaa8\ub4e0 \ubd80\ubd84\uc5d0\uc11c \uac19\uc740 \ub0b4\uc6a9\uc774\uc5c8\uc9c0\ub9cc, \ub2e8 \ud55c\uacf3 \ub2e4\ub978 \ubd80\ubd84\uc774 \uc788\uc5c8\ub2e4.<\/p>\n

\n
[DEBUG] switch_rtp.c:5617 Correct ip\/port confirmed.<\/pre>\n<\/blockquote>\n
\ubb38\uc81c\uac00 \ubc1c\uc0dd\ud55c \ub85c\uadf8\uc5d0\uc11c\ub294 \uc704\uc758 \ub77c\uc778\uc774 \ube60\uc838 \uc788\uc5c8\ub358 \uac83. \ubc14\ub85c freeswitch \uc18c\uc2a4 \ud30c\uc77c\uc744 \ud655\uc778\ud574\ubcf4\uc558\ub2e4. \ud574\ub2f9 \ub85c\uadf8 \ub77c\uc778\uc774 \uc5b4\ub5a8\ub54c \ub098\ud0c0\ub098\ub294 \ub85c\uadf8\uc778\uc9c0 \ud655\uc778\ud588\ub2e4. \ud574\ub2f9 \ub85c\uadf8\ub294 freeswitch \uc5d0\uc11c RTP \ud328\ud0b7\uc744 read \ub97c \uc2dc\uc791\ud560 \ub54c, \ub098\ud0c0\ub0b4\ub294 \ub85c\uadf8 \uc911 \ud558\ub098\uc600\ub2e4. \uc989, \ubb38\uc81c\uac00 \ub418\ub294 \ub85c\uadf8\uc5d0\uc11c\ub294 RTP read \uc2dc\uc791 \ub85c\uadf8\ub97c \ud655\uc778\ud560 \uc218 \uc5c6\uc5c8\ub2e4.<\/p>\n
\uc774\uc0c1\ud588\ub2e4. \uc65c\ub0d0\ud558\uba74 \ub098\uba38\uc9c0 SIP \uad00\ub828 \ub85c\uadf8\ub4e4\uc740 \uc815\uc0c1\uc801\uc73c\ub85c \uc1a1\/\uc218\uc2e0 \ud588\uae30 \ub54c\ubb38\uc774\ub2e4. \ub85c\uadf8\ub0b4\uc6a9\uc73c\ub85c \ud655\uc778\ud560 \uc218 \uc788\uc5c8\ub2e4.<\/p>\n
\uadf8\ub9ac\uace0 \ubd84\uc11d\ub41c \uc7a5\uc560 \ub0b4\uc6a9\uc740 \uc2e4\uc81c\ub85c \uc0ac\uc6a9\uc790\ub294 \uc74c\uc131\uc0ac\uc11c\ud568 \uba54\uc2dc\uc9c0\ub97c \ub0a8\uae30\ub824\uace0 \uc2dc\ub3c4 \ud588\uc5c8\uc9c0\ub9cc \ubb34\uc2a8\uc77c\uc774\uc5d0\uc120\uc9c0, \uc0dd\uc131\ub41c wav \ud30c\uc77c \uc0ac\uc774\uc988\uac00 \ubaa8\ub450 44 \ubc14\uc774\ud2b8(wav header size)\uac00 \uc0dd\uc131\ub418\ub294 \ud604\uc0c1\uc774\uc5c8\ub2e4.<\/p>\n
\uadf8\ub9ac\uace0.. \uacc4\uc18d\ub41c \uc7ac\ud604 \uc2e4\ud328.. \uc218\uc2ed \ucc28\ub840\uc5d0 \uac78\uce5c \ub2e4\uc591\ud55c \ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4\uc5d0\ub3c4 \uc7ac\ud604\uc5d0 \uc131\uacf5\ud560 \uc218 \uc5c6\uc5c8\ub2e4. \uc0ac\uc2e4 44 byte\uac00 \ub179\uc74c\ub418\ub294 \ud604\uc0c1\uc740 \uba87\uac1c \ucc3e\uc744 \uc218 \uc788\uc5c8\ub2e4. \ud558\uc9c0\ub9cc \ub354 \uc138\ubc00\ud55c \ubd84\uc11d \uacb0\uacfc, \uc774\ubc88 \uc7a5\uc560\uc640\ub294 \uc0c1\uad00\uc5c6\ub294 \ub2e4\ub978 \uc774\uc720\uc5d0\uc11c \ubc1c\uc0dd\ud55c \uac83\uc73c\ub85c \uacb0\ub860\uc774 \ub09c \uac83\ub4e4\uc774\uc5c8\ub2e4.<\/p>\n
\uadf8\ub7ec\ub2e4\uac00 \uaca8\uc6b0\uaca8\uc6b0 \uc624\ub298 \uc7ac\ud604\uc5d0 \uc131\uacf5\ud588\ub2e4.<\/p>\n
\uc55e\uc11c \ub9d0\ud588\ub4ef\uc774, \uc7a5\uc560\ub294 \ubd88\uaddc\uce59\uc801\uc73c\ub85c \ubc1c\uc0dd\ud558\uace0 \uc788\uc5c8\ub2e4. \ud558\uc9c0\ub9cc \uadf8 \uc911\uc5d0\uc11c\ub3c4 \uc7a5\uc560\uac00 ‘\uc790\uc8fc’ \ubc1c\uc0dd\ud558\ub294 \uace0\uac1d\uc0ac\uac00 \uc788\uc5c8\ub294\ub370, \uadf8 \uace0\uac1d\uc0ac\uc758 \uc804\ud654\ubc88\ud638\ub97c \uc774\uc6a9\ud574\uc11c \uc7ac\ud604\ud560 \uc218 \uc788\uc5c8\ub358 \uac83\uc774\ub2e4.<\/p>\n
\uc6b0\ub9ac\ud68c\uc0ac\ub294 \ub374\ub9c8\ud06c\uc5d0 \uc788\uc5c8\uace0, \ud574\ub2f9 \uace0\uac1d\uc0ac\ub294 \ub3c5\uc77c\uc5d0 \uc788\uc5c8\ub2e4. \ub374\ub9c8\ud06c\uc5d0\uc11c \ub3c5\uc77c \uace0\uac1d\uc0ac\ub85c \uc804\ud654\ub97c \uac78\uc5b4 \uc74c\uc131 \uba54\uc2dc\uc9c0\ub97c \ub0a8\uae30\uba74 \uc815\uc0c1\uc801\uc73c\ub85c \ub0a8\uae38 \uc218 \uc788\uc5c8\ub2e4. \ud558\uc9c0\ub9cc \ub3c5\uc77c \uc804\ud654\ubc88\ud638\ub97c \uc774\uc6a9\ud558\uc5ec \ub3c5\uc77c \uace0\uac1d\uc0ac\ub85c \uc804\ud654\ub97c \uac78\uba74 44 \ubc14\uc774\ud2b8\uc758 \uc74c\uc131 \ud30c\uc77c\uc774 \uc0dd\uc131\ub418\ub294 \uac83\uc774\uc5c8\ub2e4.<\/p>\n
\uc88b\ub2e4. \uc774\uc81c\uc57c \uaca8\uc6b0 \uc7ac\ud604\uc5d0 \uc131\uacf5\ud588\ub2e4. \uc5ec\uae30\uae4c\uc9c0 \ub3c4\ub2ec\ud558\uae30\uae4c\uc9c0 \uad49\uc7a5\ud788 \ub9ce\uc740 \uc2dc\uac04\uc774 \uac78\ub838\ub2e4(\uc57d, 2\uc8fc\uc77c?)<\/p>\n
\uc544\ubb34\ud2bc \ud14c\uc2a4\ud2b8\ub97c \uc9c4\ud589\ud588\ub294\ub370, \ubaa8\ub4e0 \uc11c\ubc84\uc5d0\uc11c tcpdump \uba85\ub839\uc5b4\ub97c \uc774\uc6a9\ud558\uc5ec \ud328\ud0b7\uc744 \ucea1\uccd0\ud558\uace0 \ud574\ub2f9 \ucea1\uccd0 \ub0b4\uc6a9\ub4e4\uc744 \ube44\uad50\ud588\ub2e4. \ubd84\uc11d\ub41c \ub0b4\uc6a9\uc740 \ub3c5\uc77c \ub124\ud2b8\uc6cc\ud06c \uc5b4\ub518\uac00\uc5d0\uc11c RTP \ud328\ud0b7\uc744 \ucc28\ub2e8\ud558\uace0 \uc788\uc5c8\ub358 \uac83. \uc65c \ucc28\ub2e8\uc744 \ud588\uc744\uae4c? \uc5f4\ub764 \ud1a0\ub860\ub05d\uc5d0, \uc774\ub7f0 \ud604\uc0c1\uc740 \ube44\ub2e8 \ub3c5\uc77c\ubfd0 \uc544\ub2c8\ub77c, \ub2e4\ub978 \uc5b4\ub290\uacf3\uc5d0\uc11c\ub3c4 \uac00\ub2a5\ud55c \ud604\uc0c1\uc774\ub77c\ub294 \ucd94\uce21\uc774 \ub098\uc654\ub2e4. \uadf8\ub798\uc57c\ub9cc \uadf8\ub3d9\uc548 \ubc1c\uc0dd\ud588\ub358 \ubd88\uaddc\uce59 \uc7a5\uc560\uc5d0 \ub300\ud55c \uc124\uba85\uc774 \ub41c\ub2e4\ub294 \uac83\uc774\ub2e4.<\/p>\n
\uacb0\ub860\uc801\uc73c\ub85c… \uc544\uc9c1\uae4c\uc9c0 \uc7a5\uc560\ub294 \uc9c4\ud589\uc911\uc774\ub2e4. \uc774\uc81c\uc57c \uaca8\uc6b0 \uc7ac\ud604\uc5d0 \uc131\uacf5\ud558\uace0 \ubb38\uc81c\uc758 \uc2e4\ub9c8\ub9ac\ub97c \uc7a1\uc558\uae30 \ub54c\ubb38\uc774\ub2e4. \uadf8\ub9ac\uace0, \uc624\ub298\ub85c\uc368 \uac1c\ubc1c\uc790(\ub098)\uc758 \uc798\ubabb\uc774 \uc544\ub2cc\uac83\uc73c\ub85c \ubc1d\ud600\uc84c\uc9c0\ub9cc(\u314e\u314e\u314e\u314e\u314e) \uadf8\uac83\uacfc\ub294 \ubcc4\uac1c\ub85c \uad49\uc7a5\ud788 \uc778\uc0c1\uc801\uc778 \uc7a5\uc560\uc600\uace0, \uc7a5\uc560 \ubd84\uc11d\uc774\uc5c8\ub2e4.<\/p>\n
\uc65c\ub0d0\ud558\uba74, \uc624\ub298 \ub124\ud2b8\uc6cc\ud06c \uad00\ub9ac\uc790, \uac1c\ubc1c\uc790(\ub098), \uac1c\ubc1c \uc120\uc784, \ucee8\uc124\ud134\ud2b8 \uc774\ub807\uac8c 4\uba85\uc774 \ubaa8\uc5ec \uc774\ub7f0\uc800\ub7f0 \ud1a0\ub860\uc744 \ud558\uace0, \uad6c\uccb4\uc801\uc778 \ubc29\ubc95\uc744 \uad6c\uc0c1\ud558\uace0, \ud14c\uc2a4\ud2b8\ub97c \ud588\ub294\ub370 \uad49\uc7a5\ud788 \uc778\uc0c1\uc801\uc774\uc5c8\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n
 <\/p>\n
\uacb0\ub860\uc740…\ud63c\uc790 \ub059\ub059 \uc553\uace0 \uc788\ub358 2\uc8fc\uc77c\uac04\uc758 \uace0\ubbfc\uc774 \ud55c\ubc29\uc5d0 \ud574\uacb0\ub418\uc5c8\ub2e4.\u00a0 \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
\ub298 \uc788\ub294 \uc77c\uc774\uc5c8\uc9c0\ub9cc, \ud2b9\ubcc4\ud788 \ub354 \uc774\uc0c1\ud55c \uc77c\uc774\uc5c8\ub2e4. \ubd84\uba85\ud788 \ubc1c\uc0dd\ud558\ub294 \uc7a5\uc560\uc600\ub2e4. \ud558\uc9c0\ub9cc \ub298 \uadf8\ub7ac\ub4ef\uc774 \ubd88\uaddc\uce59\uc801\uc774\uc5c8\uace0, \uc7ac\ud604\uc774 \ubd88\uac00\ub2a5\ud558\uc600\ub2e4. \uc0ac\uac74\uc758 \ubc1c\uc0dd\uc740, \uace0\uac1d\uc0ac \uc911 \ud558\ub098\uc5d0\uc11c “\uc815\uc0c1\uc801\uc73c\ub85c \uc74c\uc131\uba54\uc2dc\uc9c0\ub97c \ub0a8\uaca8\ub3c4, \uc2e4\uc81c\ub85c \uc74c\uc131 \uba54\uc2dc\uc9c0\ub97c \ud50c\ub808\uc774 \ud560 \ub54c\ub294, \uc544\ubb34 \uc18c\ub9ac\uac00 \uc548\ub09c\ub2e4”\ub294 \uac83\uc774\uc5c8\ub2e4. \uac00\ubccd\uac8c \uc0dd\uac01\ud588\ub2e4. record \ud568\uc218\uc758 \uc798\ubabb\ub41c \uc0ac\uc6a9\uc774\ub098, … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1006],"tags":[127,1007,346],"_links":{"self":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts\/3816"}],"collection":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3816"}],"version-history":[{"count":1,"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts\/3816\/revisions"}],"predecessor-version":[{"id":3817,"href":"http:\/\/pchero21.com\/index.php?rest_route=\/wp\/v2\/posts\/3816\/revisions\/3817"}],"wp:attachment":[{"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3816"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pchero21.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}