I'm adding and removing headers in the standard route[RELAY], but if there is
a redirection involved headers aren't removed.
route[RELAY]
{
#stdstuff
route(ADDCHECKSUM);
# enable additional event routes for forwarded requests
# - serial forking, RTP relaying handling, a.s.o.
if (is_method("INVITE|SUBSCRIBE")) {
t_on_branch("MANAGE_BRANCH");
t_on_reply("MANAGE_REPLY");
}
if (is_method("INVITE")) {
t_on_failure("MANAGE_FAILURE");
}
if (!t_relay()) {
sl_reply_error();
}
exit;
}
route[ADDCHECKSUM]
{
if($avp(dst_accountcode) || $avp(src_accountcode))
{
#some magic
remove_hf("X-rand");
remove_hf("X-csum");
append_hf("X-rand: $var(rand)\r\n");
append_hf("X-csum: $var(checksum)\r\n");
}
return;
}
This works well unless the destination is a redirecting sip server.
failure_route[MANAGE_FAILURE] {
route(NATMANAGE);
if (t_is_canceled()) {
exit;
}
if (t_check_status("3[0-9][0-9]"))
{
#...
route(RELAY);
exit;
}
-user calls destination.
-dispatcher sets destination is send to redirectserver and routes to RELAY,
addchecksums add some headers called from relay.
-redirectserver replies 302.
-failure route triggers and ends with a route to RELAY. Any existing old
values should be removed and the newer ones added.
But end the result is that I have two sets op X-rand/csum headers for the
INVITE to the redirection contact. How do I get rid of every X-csum/rand
header except the last added ones?
Version tested: 4.2.5.
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