[Serdev] I can't append a head field in the tm module

[Bogdan-Andrei IANCU]

take a look in textops module, at function "append_to_reply_f" to see 
how you append something to the reply; you don't need to import any 
function from other module!!

bogdan

PS: the function you try to import ("append_hf") adds a header to 
request, not to reply ;-)

szj wrote:

> Hi:
>
>  I want to insert a header field without the script. Instead I
> insert it in the tm module's t_relay() function. Next is my code.
> The first time I use the pkg_malloc(), but ser report that:
> BUG: qm_*: prev. fragm. tail overwritten(c0c0c000, abcdefed)
> so I changed the pkg_malloc to the shm_malloc();
> this time the error happend again in the different place.
>
>    typedef  int(*local_fp)(struct sip_msg *msg, str *txt, int flags);
>    str *str1;
>    char *tmp =  "P-Security-Nobody:  this is a test header for \r\n";
>    local_fp append_to_reply = NULL;
>
>    str1 = (str*)shm_malloc(sizeof(str));
>    if(str1)
>    {
>      str1->len = strlen(tmp);
>      str1->s = (char*)shm_malloc(str1->len);
>      strcpy(str1->s, tmp);
>      append_to_reply = (local_fp)find_export("append_hf", 1, 0);
>      if(append_to_reply){
>        DBG("DEBUG: SUNZJ find apppend_to_reply\n");
>        append_to_reply(p_msg, str1, NULL);
>      }
>    }
>
> the next is gdb's output.
> Program received signal SIGABRT, Aborted.
> [Switching to Thread -1208486208 (LWP 6439)]
> 0x00ad77a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> (gdb)
> (gdb) where
> #0  0x00ad77a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> #1  0x00b1b955 in raise () from /lib/tls/libc.so.6
> #2  0x00b1d319 in abort () from /lib/tls/libc.so.6
> #3  0x0808cb9d in qm_debug_frag (qm=0xb5f7e000, f=0x6) at 
> mem/q_malloc.c:156
> #4  0x0808d1ab in qm_malloc (qm=0xb5f7e000, size=4107, file=0x13fb49 
> "h_table.c", func=0x13fb1e "build_cell", line=231)
>    at mem/q_malloc.c:379
> #5  0x0011b654 in build_cell (p_msg=0x814bec0) at shm_mem.h:135
> #6  0x0012c23e in t_newtran (p_msg=0x814bec0) at t_lookup.c:988
> #7  0x00123f4e in t_relay_to (p_msg=0x814bec0, proxy=0x0, proto=0, 
> replicate=0) at t_funcs.c:241
> #8  0x0012f450 in w_t_relay (p_msg=0x814bec0, _foo=0x0, _bar=0x0) at 
> tm.c:893
> #9  0x0804fe41 in do_action (a=0x814a4ac, msg=0x814bec0) at action.c:611
> #10 0x08050bad in run_actions (a=0x814a4ac, msg=0x814bec0) at 
> action.c:719
> #11 0x08074fe8 in eval_elem (e=0x814a4fc, msg=0x814bec0) at route.c:605
> #12 0x08075482 in eval_expr (e=0x814a4fc, msg=0x814bec0) at route.c:654
> #13 0x080754be in eval_expr (e=0x814a540, msg=0x814bec0) at route.c:670
> #14 0x0804edd5 in do_action (a=0x814a684, msg=0x814bec0) at action.c:587
> #15 0x08050bad in run_actions (a=0x814a684, msg=0x814bec0) at 
> action.c:719
> #16 0x0805019f in do_action (a=0x814a3ac, msg=0x814bec0) at action.c:376
> #17 0x08050bad in run_actions (a=0x814a3ac, msg=0x814bec0) at 
> action.c:719
> #18 0x0806de90 in receive_msg (
>    buf=0x80db480 "INVITE sip:862222 at sip.suntest.com SIP/2.0\r\nVia: 
> SIP/2.0/UDP 192.168.0.19:5500;branch=z9hG4bK958088909\r\nFrom: 
> <sip:861111 at sip.suntest.com>;tag=1137899792;tag=1613933050\r\nTo: 
> <sip:862222 at sip.suntest.com"..., len=1018,
>    rcv_info=0xbffe1590) at receive.c:162
> #19 0x080858dc in udp_rcv_loop () at udp_server.c:458
> #20 0x0805d77f in main_loop () at main.c:1032
> #21 0x0805ece5 in main (argc=2, argv=0xbffe1754) at main.c:1569
>
>  Anyone who tell me what the problem is will be appreciated.
>  
>  Thanks for your kind help
>  Best Regards.
>
> Sun Zongjun
>
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