Avoid unexpected "482 Request Merged" #211
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added 2 commits
April 10, 2023 08:04
In certain cases 'leg_method' might be null so the IF statement:
if (leg_method && method_name && !su_casematch(method_name, leg_method))
continue;
is not working at all despite 'method_name' is not null. It leads to
leg matching process returns false positive at:
if (loose_match == NULL)
loose_match = leg;
…2.2; 17.2.3/ Implements missing matching rules (17.2.3.1 and 17.2.3.2)
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Apr 25, 2023
algitbot
pushed a commit
to alpinelinux/aports
that referenced
this pull request
Apr 25, 2023
algitbot
pushed a commit
to alpinelinux/aports
that referenced
this pull request
Apr 25, 2023
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This pull request consists of two commits and is aimed to avoid unexpected (wrong) "482 Request Merged" responses. These commits are implementing missing matching rules described in RFC3261 sections 17.2.3.1/2, and also fixing leg matching condition.
Use case: Call group calling process hunts sequentially for a group member that answers a group call. During a process it sends next INVITE upon previous one got canceled due to "No answer" or "Busy here" response. Such a next INVITE has different branch parameter in the topmost Via, however FreeSwitch (mod_sofia) still qualifies this new transaction as to be merged with an existing one. So the affords to add simple implementation of 17.2.3.1/2 rules and correcting the leg matching condition fixed the case.