(gdb) bt
#0  0xb7caaa71 in strcasecmp () from /lib/tls/libc.so.6
#1  0xb73df361 in handle_request_invite (p=0x81d1c20, req=0xb739c120, debug=0,
    seqno=1, sin=0xb739c110, recount=0xb739c104,
    e=0xb739c343 "sip:07968133414@192.168.3.197") at chan_sip.c:13145
#2  0xb73e38cf in handle_request (p=0x81d1c20, req=0xb739c120, sin=0xb739c110,
    recount=0xb739c104, nounlock=0xb739c108) at chan_sip.c:14206
#3  0xb73e4233 in sipsock_read (id=0x818ff80, fd=17, events=1, ignore=0x0)
    at chan_sip.c:14354
#4  0x0809f366 in ast_io_wait (ioc=0x8169358, howlong=1000) at io.c:279
#5  0xb73e4abc in do_monitor (data=0x0) at chan_sip.c:14547
#6  0x080eb397 in dummy_start (data=0x81900e8) at utils.c:538
#7  0xb7ed90bd in start_thread () from /lib/tls/libpthread.so.0
#8  0xb7d098ae in clone () from /lib/tls/libc.so.6
(gdb)