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kazoo-configs-kamailio
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added comments and fixed association bug were with maps back to itself

3.12
K Anderson 15 years ago
parent
7e6b7006aa
commit
41fa401570
1 changed files with 118 additions and 27 deletions
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  1. +118
    -27
      opensips/opensips.cfg

+ 118
- 27
opensips/opensips.cfg View File

@ -291,11 +291,14 @@ modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
######################################################################
route
{
# log the basic info regarding this call
xlog("L_INFO", "$ci|start|recieved $oP request $rm $ou");
xlog("L_INFO", "$ci|log|source $si:$sp");
xlog("L_INFO", "$ci|log|from $fu");
xlog("L_INFO", "$ci|log|to $tu");
# check that hop cound for this request and make sure it is under 10
# to prevent endless loops
if (!mf_process_maxfwd_header("10"))
{
xlog("L_WARN", "$ci|end|to many hops");
@ -305,6 +308,10 @@ route
exit;
}
# this check detemines if the opensips has routed the request to itself,
# this happens because the server is the destination of the request but
# we mangle it to send it else where. When that mangeling fails and we
# still relay it then it just comes right back to us...
if (src_ip==myself)
{
xlog("L_WARN", "$ci|end|sourced from this server");
@ -312,6 +319,8 @@ route
exit;
}
# currently we dont support subscribe in whistle so to keep the noise down
# just end the request here. For options just end the request here as well.
if (is_method("OPTIONS|SUBSCRIBE"))
{
xlog("L_NOTICE", "$ci|end|unsupported method");
@ -321,7 +330,9 @@ route
exit;
}
# if the source IP/port are in one of the server dispatch lists
# then this request originated from one of our media servers, mark it
# as such by setting flag 26
if (ds_is_in_list("$si", "$sp", "1") || ds_is_in_list("$si", "$sp", "2"))
{
xlog("L_INFO", "$ci|log|inception on-net");
@ -329,11 +340,16 @@ route
# Flag 26 marks the source as a on-net server
setflag(26);
}
# if the request source IP/port was not in any dispatcher lists
# this this originated outside our equipment (carrier, client, ect)
else
{
xlog("L_INFO", "$ci|log|inception off-net");
}
# if the to header has a tag attached then it implies this request
# has been processed by us before (IE: a media server has added
# its tag on the to header in prior messages)
if (has_totag())
{
# sequential request within a dialog should
@ -342,7 +358,9 @@ route
{
append_hf("P-hint: rr-enforced\r\n");
if (isflagset(26) && is_method("ACK"))
# if the request is an ACK from our media servers with a IP in the from domain
# then bump the association
if ($(fd{ip.isip}) && isflagset(26) && is_method("ACK"))
{
xlog("L_INFO", "$ci|log|maintaining contact association to media server $fd");
@ -373,6 +391,8 @@ route
}
}
# request with a to tag that cant be routed loosly and is not an ACK
# ignor eand discard
xlog("L_WARN", "$ci|end|could not route in dialog");
sl_send_reply("486", "PC Load Letter");
@ -380,7 +400,7 @@ route
exit;
}
# CANCEL processing
# if the request is to cancel a transaction process it now
if (is_method("CANCEL"))
{
# If this cancel is part of a transaction
@ -391,6 +411,8 @@ route
route(1);
}
# if the cancel does not belong to a known transaction or a
# request that has not progressed outside this server dont relay it
else
{
xlog("L_NOTICE", "$ci|end|no matching transaction");
@ -403,7 +425,9 @@ route
# and do standard processing of the message
t_check_trans();
# preloaded route checking
# Except for an ACK no request should have a route set with no to tag, this would
# indicate that the intial request has the Route headers and is likely someone trying
# to get us to send the request were they want
if (loose_route())
{
if (!is_method("ACK"))
@ -416,8 +440,12 @@ route
}
}
# If the request is a register we will pass it along but we need
# to add the path header (along with the received IP/port info)
if (is_method("REGISTER"))
{
# if we fail to add the path header then dont let it
# register because it will cause issues later...
if (!add_path_received())
{
xlog("L_ERR", "$ci|end|unable to add path");
@ -430,19 +458,21 @@ route
xlog("L_INFO", "$ci|log|added path");
}
# is from media servers
# if the request is from on of our media servers then dont change the routing
if (isflagset(26))
{
xlog("L_INFO", "$ci|log|originated from internal source");
}
# not from media severs has a contact uri and is in memcache
# if the request is not from our media severs but has a contact uri in memcache
# then change the routing to go to the server previously associated with it.
else if ($ct.fields(uri) && cache_fetch("memcached_callid_hash", "$(ct.fields(uri){uri.user})", $avp(i:55)))
{
$rd = $avp(i:55);
xlog("L_INFO", "$ci|log|contact $(ct.fields(uri){uri.user}) is associated with media server");
xlog("L_INFO", "$ci|log|contact $(ct.fields(uri){uri.user}) is associated with media server $rd");
}
# not from media servers and call id is in memcache
# if the request is not from our media severs but has a call-id in memcache
# then change the routing to go to the server previously associated with it.
else if (cache_fetch("memcached_callid_hash", "$ci", $avp(i:55)))
{
$rd = $avp(i:55);
@ -456,15 +486,26 @@ route
cache_store("memcached_callid_hash", "$(ct.fields(uri){uri.user})", "$rd", 3600);
}
}
# not from media servers and no information in memcache
# if the request is not from our media servers and no associations in memcache
# then try to distribute to a media server
else if (ds_select_domain("1", "4"))
{
xlog("L_INFO", "$ci|log|routing call to arbitrary media server $rd");
}
# if no media server could be set with ds_select_domain and there is no existing
# association then we have no way to route this call, terminate
else
{
ds_select_domain("1", "4");
xlog("L_ERR", "$ci|end|no servers avaliable");
xlog("L_INFO", "$ci|log|routing call to arbitrary media server");
sl_send_reply("486", "All servers busy");
exit;
}
# record routing
# for all initial request (not having been processed above in the has_totag)
# that are not a register or message add this sever to the route set on the
# request so subsequent messages come through this server
if (!is_method("REGISTER|MESSAGE"))
{
# Record the route that this request has taken
@ -481,34 +522,52 @@ route[1]
{
route("nat_test_and_correct");
# if the request domain is an IP and it exists in the list of our media servers (irregardless of the port)
# then...
# 1. remove any X-AUTH-IP headers so we will be the only one to set it
# 2. set the X-AUTH-IP header for freeswitch ACLs
# 3. set the final reply timer to two seconds, so we failover faster
# 4. arm a logging branch for replies
# 5. arm a failure branch that will try another one of our media servers when possible
if ($(rd{ip.isip}) && (ds_is_in_list("$rd", "", "1") || ds_is_in_list("$rd", "", "2")))
{
remove_hf("X-AUTH-IP");
xlog("L_INFO", "$ci|log|X-AUTH-IP: $si");
append_hf("X-AUTH-IP: $si\r\n");
xlog("L_INFO", "$ci|log|provisional reply required in 2 seconds");
$avp(s:final_reply_timer) = 2;
t_on_reply("on_net_reply");
t_on_failure("on_net_fault");
}
# if the request domain is not an IP or in our list of media servers then
# assume it is going somewhere outside our control and give that equipment
# longer to respond. Also arm a branch to log the replies
else
{
xlog("L_INFO", "$ci|log|provisional reply required in 6 seconds");
$avp(s:final_reply_timer) = 6;
t_on_reply("off_net_reply");
}
if (!t_relay())
# try to send the request on its way, if it fails send back a
# stateless error to the requestor
if (t_relay())
{
xlog("L_ERR", "$ci|end|unable to relay message");
sl_reply_error();
xlog("L_INFO", "$ci|pass|$rd");
}
else
{
xlog("L_INFO", "$ci|pass|$rd");
xlog("L_ERR", "$ci|end|unable to relay message");
sl_reply_error();
}
exit;
@ -516,33 +575,40 @@ route[1]
route[nat_test_and_correct]
{
# check if the request is from a client behind NAT, and fix if so...
# this check looks at:
# 1. if client has a private IP address (as defined by RFC1918) in the Contact field of the SIP message
# 2. if client has contacted OpenSIPS from an address that is different from the one in the Via field
if (client_nat_test("3"))
{
xlog("L_INFO", "$ci|log|via address differs from source or RFC1918 address in contact");
# adds the rport parameter to the first Via header
force_rport();
#xlog("L_INFO", "$ci|log|forced rport");
# will replace the IP and port in the Contact header with the IP and port
# the SIP message was received from
fix_contact();
#xlog("L_INFO", "$ci|log|fixed contact");
}
# if the request has a body see if it needs NAT corrections as well,
# this check looks at:
# 8. SDP is searched for occurrence of RFC1918 addresses
if (has_body("application/sdp") && nat_uac_test("8"))
{
xlog("L_INFO", "$ci|log|SDP contains a RFC1918 address");
#xlog("L_INFO", "$ci|log|rewrite SDP connection data with source address");
#xlog("L_INFO", "$ci|log|rewrite SDP origin with source address ");
# alters the SDP information in order to facilitate NAT traversal.
# 2. rewrite media IP address (c=) with source IP
# 8. rewrite IP from origin description (o=) with source IP
fix_nated_sdp("10");
}
}
onreply_route[off_net_reply]
{
# this branch handles replies that are comming from equipment
# outside our control, just logging and NAT corrections
xlog("L_INFO", "$ci|start|recieved off-net reply $rs $rr");
xlog("L_INFO", "$ci|log|source $si:$sp");
@ -553,11 +619,16 @@ onreply_route[off_net_reply]
onreply_route[on_net_reply]
{
# this branch handles replies that are comming from our
# media server, just logging and NAT corrections
xlog("L_INFO", "$ci|start|recieved on-net reply $rs $rr");
xlog("L_INFO", "$ci|log|source $si:$sp");
route("nat_test_and_correct");
# if one of our media servers has replied with a 407 or 401 associate
# this call-id with that media server so the next "initial" requests
# go to it (IE: the reply to the challenge)
if (t_check_status("(407)|(401)"))
{
cache_store("memcached_callid_hash", "$ci ", "$si", 60);
@ -570,6 +641,8 @@ onreply_route[on_net_reply]
failure_route[on_net_fault]
{
# if the failure cause was due to the transaction being
# cancelled then we are complete
if (t_was_cancelled())
{
xlog("L_INFO", "$ci|end|transaction was cancelled");
@ -577,6 +650,8 @@ failure_route[on_net_fault]
exit;
}
# if the failure case was soemthing that we should recover
# from then try to find a new media server
if (t_check_status("(408)|(5[0-9][0-9])"))
{
xlog("L_INFO", "$ci|start|recieved or generated negative reply");
@ -584,12 +659,24 @@ failure_route[on_net_fault]
xlog("L_ERR", "$ci|log|moving media server $rd to probing mode");
# flag the media server that failed and start sending SIP pings
# when it begins responding put it back in the lsit
ds_mark_dst("p");
if(ds_select_domain("1", "4"))
# keep track of the original request domain so we can detemine
# if ds_select_domain chooses the same domain...
$avp(s:old_rd)=$rd;
# try to find a new media server to send the calls to, this is
# taking advantage of a bug since ds_select_domain is not supposed
# to be using in the failover branch (but it is necessary in our
# configuration).
if(ds_select_domain("1", "4") && $avp(s:old_rd) != $rd)
{
xlog("L_INFO", "$ci|log|routing call to arbitrary media server");
xlog("L_INFO", "$ci|log|routing call to arbitrary media server $rd");
# if the request has a contact and is an INVITE then store the new
# association
if ($ct.fields(uri) && is_method("INVITE"))
{
xlog("L_INFO", "$ci|log|associated contact $(ct.fields(uri){uri.user}) with media server $rd");
@ -599,11 +686,15 @@ failure_route[on_net_fault]
xlog("L_INFO", "$ci|pass|$rd");
# reset the final reply timer
$avp(s:final_reply_timer) = 2;
# relay the request to the new media server
t_relay();
exit;
}
xlog("L_ERR", "$ci|end|no other media servers avaliable");
}
}

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