[OpenSIPS-Devel] [OpenSIPS/opensips] 981e35: Fix crash when using $si in non SIP routes.

[Bogdan-Andrei Iancu]

  Branch: refs/heads/2.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 981e3541239ce67481abfc52cae769f7bd35a6ee
      https://github.com/OpenSIPS/opensips/commit/981e3541239ce67481abfc52cae769f7bd35a6ee
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2016-03-15 (Tue, 15 Mar 2016)

  Changed paths:
    M evi/event_interface.c
    M modules/dialog/dlg_req_within.h
    M modules/event_route/route_send.c
    M pvar.c
    M route.c
    M timer.c

  Log Message:
  -----------
  Fix crash when using $si in non SIP routes.

If using $si in event, timer or startup routes, return a NULL value.
Use a dummy AF_INET from src and dst IPs.
Prevent crashing while evaluating $si by checking return code of ip_addr2a()
Closes #817
Outdates #828

(cherry picked from commit 2d0cebc0be2491984ce357afd89d41212866bc06)