[sr-dev] git:master: tmx: be sure From header is parsed before accessing the tag

[Juha Heinanen]

there is still something wrong with t_precheck_trans().  when i use it,
sip proxy process handling a requests gets stuck in some kind of loop.
top show that it uses lots of cpu.

gdb where attached to the process is shown below.

-- juha

(gdb) where
#0  0x00007f446c3a0e08 in tmx_check_pretran (msg=0x7f447a2bad88)
    at tmx_pretran.c:308
#1  0x00007f446c39edeb in w_t_precheck_trans (msg=0x7f447a2bad88, p1=0x0, 
    p2=0x0) at tmx_mod.c:709
#2  0x000000000041c6b3 in do_action (h=0x7fff80ddb7c0, a=0x7f44799e62c8, 
    msg=0x7f447a2bad88) at action.c:1107
#3  0x0000000000425233 in run_actions (h=0x7fff80ddb7c0, a=0x7f44799e62c8, 
    msg=0x7f447a2bad88) at action.c:1607
#4  0x000000000042591f in run_actions_safe (h=0x7fff80ddc070, 
    a=0x7f44799e62c8, msg=0x7f447a2bad88) at action.c:1672
#5  0x00000000004cb56f in rval_get_int (h=0x7fff80ddc070, msg=0x7f447a2bad88, 
    i=0x7fff80ddbee0, rv=0x7f44799e6558, cache=0x0) at rvalue.c:924
#6  0x00000000004ce227 in rval_expr_eval_int (h=0x7fff80ddc070, 
    msg=0x7f447a2bad88, res=0x7fff80ddbee0, rve=0x7f44799e6550)
    at rvalue.c:1918
#7  0x000000000041c3d6 in do_action (h=0x7fff80ddc070, a=0x7f44799e6ed0, 
    msg=0x7f447a2bad88) at action.c:1083
#8  0x0000000000425233 in run_actions (h=0x7fff80ddc070, a=0x7f44799da228, 
    msg=0x7f447a2bad88) at action.c:1607
#9  0x00000000004259e7 in run_top_route (a=0x7f44799da228, msg=0x7f447a2bad88, 
    c=0x0) at action.c:1693
#10 0x00000000004ab495 in receive_msg (
    buf=0x1808390 "SUBSCRIBE sip:192.98.102.30:5080;transport=tcp SIP/2.0\r\nVia: SIP/2.0/TCP 192.98.102.30:5054;rport;branch=z9hG4bKxcqiqhbw\r\nRoute: <sip:192.98.102.30;transport=tcp;r2=on;lr>,<sip:127.0.0.1:5070;transpor"..., len=579, 
    rcv_info=0x7f44708ec3d8) at receive.c:213
#11 0x0000000000533b6e in receive_tcp_msg (
    tcpbuf=0x7f44708ec6a8 "SUBSCRIBE sip:192.98.102.30:5080;transport=tcp SIP/2.0\r\nVia: SIP/2.0/TCP 192.98.102.30:5054;rport;branch=z9hG4bKxcqiqhbw\r\nRoute: <sip:192.98.102.30;transport=tcp;r2=on;lr>,<sip:127.0.0.1:5070;transpor"..., 
    len=579, rcv_info=0x7f44708ec3d8, con=0x7f44708ec3c0) at tcp_read.c:1232
#12 0x0000000000534a20 in tcp_read_req (con=0x7f44708ec3c0, 
    bytes_read=0x7fff80ddc4cc, read_flags=0x7fff80ddc4c8) at tcp_read.c:1387
#13 0x0000000000535e0c in handle_io (fm=0x7f447a39a5b0, events=1, idx=-1)
    at tcp_read.c:1559
#14 0x000000000052edd9 in io_wait_loop_epoll (h=0x8e4200, t=2, repeat=0)
    at io_wait.h:1092
#15 0x0000000000536ce2 in tcp_receive_loop (unix_sock=57) at tcp_read.c:1728
#16 0x000000000052929f in tcp_init_children () at tcp_main.c:4970
#17 0x0000000000470d9d in main_loop () at main.c:1704
#18 0x00000000004739ae in main (argc=17, argv=0x7fff80ddc998) at main.c:2554