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RFC 3261 [20.19] specifies the Expiry value of a method to be
between 0 and 2^32-1 seconds. Internally, the expiry value (stored
as pjsip_expires_hdr, which is pjsip_generic_int_hdr, which is
pj_int32_t) is a signed value, so when a method with a large expiry
comes in, it overflows. I think the corrective action here would be to either change the expiry variable to an pj_uint32_t or, if -1 is a valid internal value, pj_int64_t.
GIL RICHARD •
SOFTWARE SYSTEMS DEVELOPER
INTERTALK CRITICAL
INFORMATION SYSTEMS
    
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