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chan_sip: Reject calls without prior SDP on 200 OK

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If we receive a 200 OK without SDP, we will now check to see if
the remote address has been established for that channel's RTP
session and if the to tag for that channel has changed from
the most recent to tag in a response less than 200.
If either a change has been made since the last to-tag was
received or the remote address is unset, then we will drop
the call.

(closes issue ASTERISK-22424)
Reported by: Jonathan Rose
Review: https://reviewboard.asterisk.org/r/2827/diff/#index_header
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Merged revisions 398835 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 398836 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 398837 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@398838 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jonathan Rose
2013-09-11 20:03:19 +00:00
parent 9b3e0b095e
commit 187802eeb2
2 changed files with 14 additions and 0 deletions
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1
channels/sip/include/sip.h
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@@ -1019,6 +1019,7 @@ struct sip_pvt {
AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
AST_STRING_FIELD(redircause); /*!< Referring cause */
AST_STRING_FIELD(theirtag); /*!< Their tag */
AST_STRING_FIELD(theirprovtag); /*!< Provisional their tag, used when evaluating responses to invites */
AST_STRING_FIELD(tag); /*!< Our tag for this session */
AST_STRING_FIELD(username); /*!< [user] name */
AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */