[asterisk-bugs] [JIRA] (ASTERISK-20720) Accept MWI subscriptions with several elements in Accept header

[Alexei Gradinari (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-20720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexei Gradinari updated ASTERISK-20720:
----------------------------------------

    Attachment: mwi-subscriptions.patch
    
> Accept MWI subscriptions with several elements in Accept header
> ---------------------------------------------------------------
>
>                 Key: ASTERISK-20720
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20720
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Subscriptions
>    Affects Versions: 1.8.18.0, 10.10.0, 11.0.0
>         Environment: Linux Slackware 13.0
> Linux Kernel 3.1.0 i686
>            Reporter: Alexei Gradinari
>            Severity: Minor
>         Attachments: mwi-subscriptions.patch
>
>
> There are SIP UAs which send SIP SUBSCRIBE with several elements in Accept header.
> For example
> ================================
> SUBSCRIBE sip:NAME at XXX.XXX.XXX.XXX:5060 SIP/2.0
> From: <sip:NAME at XXX.XXX.XXX.XXX:5060>;tag=10f21b8-267564c2-13c4-45028-1a7-39b4fd5b-1a7
> To: <sip:NAME at XXX.XXX.XXX.XXX:5060>
> Call-ID: 10fa418-267564c2-13c4-45028-1a7-2c53e6e5-1a7
> CSeq: 2 SUBSCRIBE
> Via: SIP/2.0/UDP YYY.YYY.YYY.YYY:5060;branch=z9hG4bK-1a8-67a33-79138a66
> Expires: 180
> Event: message-summary
> Max-Forwards: 70
> Supported: replaces,100rel
> User-Agent: Thomson TG784 Build 8.2.7.7
> Contact: <sip:NAME at YYY.YYY.YYY.YYY:5060>
> Accept: application/dtmf-relay, x-application/dtmf-relay, application/sdp,application/simple-message-summary
> Content-Length: 0
> ================================
> Asterisk does not support multiply elements in Accept header for MWI SUBSCRIBE.
> This patch fixes it.
> --- chan_sip.c  2012-11-05 11:29:46.000000000 -0500
> +++ chan_sip.c-new      2012-11-22 12:58:04.527860807 -0500
> @@ -27126,7 +27126,7 @@
>  
>                 accept = __get_header(req, "Accept", &start);
>                 while (!found_supported && !ast_strlen_zero(accept)) {
> -                       found_supported = strcmp(accept, "application/simple-message-summary") ? 0 : 1;
> +                       found_supported = strstr(accept, "application/simple-message-summary") ? 1 : 0;
>                         if (!found_supported && (option_debug > 2)) {
>                                 ast_debug(1, "Received SIP mailbox subscription for unknown format: %s\n", accept);
>                         }

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