(gdb) bt full
#0  0xb4a710b7 in realtime_peer (peername=0xb4a63130 "fred") at chan_iax2.c:2556
        __p = 10
        __x = 0
        var = (struct ast_variable *) 0x8123160
        tmp = (struct ast_variable *) 0x8122ec8
        peer = (struct iax2_peer *) 0x0
        regseconds = 11578503
        nowtime = 0
        dynamic = 1
        __PRETTY_FUNCTION__ = "realtime_peer"
#1  0xb4a6bce0 in find_peer (name=0xb4a63130 "fred", realtime=1) at chan_iax2.c:805
        peer = (struct iax2_peer *) 0x0
#2  0xb4a7a12d in register_verify (callno=1, sin=0xb4a663c0, ies=0xb4a64180) at chan_iax2.c:4903
        requeststr = '\0' <repeats 255 times>
        peer = "fred", '\0' <repeats 251 times>
        md5secret = '\0' <repeats 255 times>
        rsasecret = '\0' <repeats 255 times>
        secret = '\0' <repeats 255 times>
        iabuf = '\0' <repeats 15 times>
        p = (struct iax2_peer *) 0x0
        key = (struct ast_key *) 0x0
        keyn = 0x0
        x = 0
        expire = 60
        __PRETTY_FUNCTION__ = "register_verify"
#3  0xb4a856f0 in socket_read (id=0x8149ae8, fd=26, events=1, cbdata=0x81498f0) at chan_iax2.c:7163
        sin = {sin_family = 2, sin_port = 55569, sin_addr = {s_addr = 50331658}, sin_zero = "\000\000\000\000\000\000\000"}
        res = 22
        updatehistory = 0
        new = 1
        buf = "\200\001\000\000\000\000\000\023\000\000\006\r\000\004fred\000\002\000<", '\0' <repeats 2942 times>, "\207¬°\000\000\000\000\000l\201©´0\214\024\b°k¦´Èd¦´G秴T\206©´0J\004@\230_¦´", '\0' <repeats 32 times>, "\001\000\000\000H¤\207B%¾\a\000\001", '\0' <repeats 899 times>, "¤>\223", '\0' <repeats 45 times>, "8\230\237\000\000\230\237\000 \000\000\000\000\230\237", '\0' <repeats 17 times>, "8\230\237", '\0' <repeats 46 times>, "\230\237\000\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
        ptr = 0x0
        len = 16
        dcallno = 0
        fh = (struct ast_iax2_full_hdr *) 0xb4a653b0
        mh = (struct ast_iax2_mini_hdr *) 0xb4a653b0
        meta = (struct ast_iax2_meta_hdr *) 0xb4a653b0
        vh = (struct ast_iax2_video_hdr *) 0xb4a653b0
        mth = (struct ast_iax2_meta_trunk_hdr *) 0x0
        mte = (struct ast_iax2_meta_trunk_entry *) 0x0
        mtm = (struct ast_iax2_meta_trunk_mini *) 0x0
        dblbuf = '\0' <repeats 4095 times>
        fr = {sockfd = 0, callno = 1, dcallno = 0, data = 0x0, datalen = 0, retries = 0, ts = 19, retrytime = 0, outoforder = 0, sentyet = 0, oseqno = 0, 
  iseqno = 0, transfer = 0, final = 0, direction = 0, retrans = 0, next = 0x0, prev = 0x0, af = {frametype = 0, subclass = 0, datalen = 0, samples = 0, 
    mallocd = 0, offset = 0, src = 0x0, data = 0x0, delivery = {tv_sec = 0, tv_usec = 0}, prev = 0x0, next = 0x0}, unused = '\0' <repeats 63 times>, 
  afdata = 0xb4a64374 ""}
        cur = (struct iax_frame *) 0x0
        iabuf = '\0' <repeats 15 times>
        f = {frametype = 6, subclass = 13, datalen = 10, samples = 0, mallocd = 0, offset = 0, src = 0x0, data = 0x0, delivery = {tv_sec = 0, 
    tv_usec = 0}, prev = 0x0, next = 0x0}
        c = (struct ast_channel *) 0x0
        dp = (struct iax2_dpcache *) 0x0
        peer = (struct iax2_peer *) 0x0
        tpeer = (struct iax2_trunk_peer *) 0x0
        rxtrunktime = {tv_sec = 0, tv_usec = 0}
        ies = {called_number = 0x0, calling_number = 0x0, calling_ani = 0x0, calling_name = 0x0, calling_ton = -1, calling_tns = -1, calling_pres = -1, 
  called_context = 0x0, username = 0xb4a653be "fred", password = 0x0, capability = 0, format = 0, codec_prefs = 0x0, language = 0x0, version = 0, 
  adsicpe = 0, dnid = 0x0, rdnis = 0x0, authmethods = 0, encmethods = 0, challenge = 0x0, md5_result = 0x0, rsa_result = 0x0, apparent_addr = 0x0, 
  refresh = 60, dpstatus = 0, callno = 0, cause = 0x0, causecode = 0 '\0', iax_unknown = 0 '\0', msgcount = -1, autoanswer = 0, musiconhold = 0, 
  transferid = 0, datetime = 0, devicetype = 0x0, serviceident = 0x0, firmwarever = -1, fwdesc = 0, fwdata = 0x0, fwdatalen = 0 '\0', enckey = 0x0, 
  enckeylen = 0 '\0', provver = 0, samprate = 1, provverpres = 0, rr_jitter = 0, rr_loss = 0, rr_pkts = 0, rr_delay = 0, rr_dropped = 0, rr_ooo = 0}
        ied0 = {buf = '\0' <repeats 1023 times>, pos = 0}
        ied1 = {buf = '\0' <repeats 1023 times>, pos = 0}
        format = 0
        exists = 0
        minivid = 0
        ts = 0
        empty = '\0' <repeats 31 times>
        duped_fr = (struct iax_frame *) 0x0
        host_pref_buf = '\0' <repeats 127 times>
        caller_pref_buf = '\0' <repeats 127 times>
        pref = {order = '\0' <repeats 31 times>}
        rpref = {order = '\0' <repeats 31 times>}
        using_prefs = 0xb4a94a6d "mine"
        __PRETTY_FUNCTION__ = "socket_read"
#4  0x0805479b in ast_io_wait (ioc=0x8120ee0, howlong=1000) at io.c:268
        res = 1
        x = 0
        origcnt = 2
#5  0xb4a88581 in network_thread (ignore=0x0) at chan_iax2.c:7747
        res = 1000
        f = (struct iax_frame *) 0x0
        freeme = (struct iax_frame *) 0x0
#6  0x00b09341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#7  0x00998fee in clone () from /lib/tls/libc.so.6
No symbol table info available.