[Serusers] Issues when using LCR module
Anthony Dean
tdean at tristarcorp.net
Fri Sep 9 19:25:54 CEST 2005
I am getting a weird issue when I use the LCR modules and I am not sure if
its a bug in the module or my config. It only happens when the first leg
has failed the invite and it jumps to the failure route and tries the next
gateway on the list.
The bug is in the "c=IN IPV4" line in the invite to the second gateway where
there should only be one ip address. So it sends the following:
c=IN IPV4 192.168.8.35192.168.8.35.
when it should be:
c=IN IPV4 192.168.8.35.
This makes the second gateway give back a 488 not acceptable back regardless
if it can process the call or not as the header is malformed. If the first
gateway of choice doesn't give back an error the call will connect just fine
as the first invite is correctly formatted (which makes me think it is
something to do with how I process the failure route that is at fault or how
the lcr does it - just can't figure out which).
Below is the sip message flow that I get (I made the first gateway give back
a 404 not found to test the lcr failover).
Call flow is supposed to be:
PH-A = 2958770000 (Caller, 192.168.10.30 [Nat Inside], 192.168.7.250 [Nat
Outside])
PH-B = 2959770000 (Called, PSTN)
GW-A = 192.168.8.6
GW-B = 192.168.35.18
SER = 192.168.8.35
PH-A -> SER (INVITE - Good)
PH-A <- SER (100 Trying - Good)
SER -> GW-A (INVITE - Good)
SER <- GW-A (100 Trying - Good)
SER <- GW-A (404 Not Found - Good)
SER -> GW-A (ACK - Good)
SER -> GW-B (INVITE - Malformed)
SER <- GW-B (488 Not Acceptable - Due To Malformed Header)
...
Then the call fails due to no more gateways as expected.
Any ideas what is causing this (my config is mainly based on the onsip pstn
example with lcr extras)?
U 192.168.7.250:61903 -> 192.168.8.35:5060
INVITE sip:2959770000 at 192.168.8.35 SIP/2.0.
Via: SIP/2.0/UDP 192.168.10.30:5060;branch=z9hG4bK-701a9765.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
Max-Forwards: 70.
Contact: 2958770000 <sip:2958770000 at 192.168.10.30:5060>.
Expires: 240.
User-Agent: Linksys/PAP2-2.0.13(LSb).
Content-Length: 286.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 712750 712750 IN IP4 192.168.10.30.
s=-.
c=IN IP4 192.168.10.30.
t=0 0.
m=audio 16430 RTP/AVP 18 0 8 100 101.
a=rtpmap:18 G729a/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:100 NSE/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 192.168.8.35:5060 -> 192.168.7.250:61903
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP
192.168.10.30:5060;branch=z9hG4bK-701a9765;rport=61903;received=192.168.7.25
0.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
Server: Sip Express Router (0.9.4 - i386/linux).
Content-Length: 0.
.
U 192.168.8.35:5060 -> 192.168.8.6:5060
INVITE sip:12959770000 at 192.168.8.6 SIP/2.0.
Record-Route:
<sip:2959770000 at 192.168.8.35:5060;nat=yes;ftag=d0ff6100e33025ado0;lr=on>.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.0.
Via: SIP/2.0/UDP
192.168.10.30:5060;rport=61903;received=192.168.7.250;branch=z9hG4bK-701a976
5.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
Max-Forwards: 16.
Contact: 2958770000 <sip:2958770000 at 192.168.7.250:61903>.
Expires: 240.
User-Agent: Linksys/PAP2-2.0.13(LSb).
Content-Length: 284.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 712750 712750 IN IP4 192.168.10.30.
s=-.
c=IN IP4 192.168.8.35.
t=0 0.
m=audio 35040 RTP/AVP 18 0 8 100 101.
a=rtpmap:18 G729a/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:100 NSE/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 192.168.8.6:50183 -> 192.168.8.35:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.0,SIP/2.0/UDP
192.168.10.30:5060;rport=61903;received=192.168.7.250;branch=z9hG4bK-701a976
5.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>;tag=22C61F2C-2339.
Date: Thu, 08 Sep 2005 21:06:38 GMT.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 101 INVITE.
Allow-Events: telephone-event.
Content-Length: 0.
.
U 192.168.8.6:50183 -> 192.168.8.35:5060
SIP/2.0 404 Not Found.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.0,SIP/2.0/UDP
192.168.10.30:5060;rport=61903;received=192.168.7.250;branch=z9hG4bK-701a976
5.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>;tag=22C61F2C-2339.
Date: Thu, 08 Sep 2005 21:06:38 GMT.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 101 INVITE.
Allow-Events: telephone-event.
Reason: Q.850;cause=3.
Content-Length: 0.
.
U 192.168.8.35:5060 -> 192.168.8.6:5060
ACK sip:12959770000 at 192.168.8.6 SIP/2.0.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.0.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
To: <sip:2959770000 at 192.168.8.35>;tag=22C61F2C-2339.
CSeq: 101 ACK.
User-Agent: Sip Express Router (0.9.4 - i386/linux).
Content-Length: 0.
.
U 192.168.8.35:5060 -> 192.168.35.18:5060
INVITE sip:12959770000 at 192.168.35.18 SIP/2.0.
Record-Route:
<sip:2959770000 at 192.168.8.35:5060;nat=yes;ftag=d0ff6100e33025ado0;lr=on>.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.1.
Via: SIP/2.0/UDP
192.168.10.30:5060;rport=61903;received=192.168.7.250;branch=z9hG4bK-701a976
5.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
Max-Forwards: 16.
Contact: 2958770000 <sip:2958770000 at 192.168.7.250:61903>.
Expires: 240.
User-Agent: Linksys/PAP2-2.0.13(LSb).
Content-Length: 300.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 712750 712750 IN IP4 192.168.10.30.
s=-.
c=IN IP4 192.168.8.35192.168.8.35.
t=0 0.
m=audio 3504035040 RTP/AVP 18 0 8 100 101.
a=rtpmap:18 G729a/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:100 NSE/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 192.168.35.18:5060 -> 192.168.8.35:5060
SIP/2.0 488 Not acceptable here.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.1.
Via: SIP/2.0/UDP
192.168.10.30:5060;received=192.168.7.250;branch=z9hG4bK-701a9765.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>;tag=as113c57f8.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
User-Agent: Video PBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER.
Contact: <sip:12959770000 at 192.168.35.18>.
Content-Length: 0.
.
U 192.168.8.35:5060 -> 192.168.35.18:5060
ACK sip:12959770000 at 192.168.35.18 SIP/2.0.
Via: SIP/2.0/UDP 192.168.8.35;branch=z9hG4bK1128.6389a122.1.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
To: <sip:2959770000 at 192.168.8.35>;tag=as113c57f8.
CSeq: 101 ACK.
User-Agent: Sip Express Router (0.9.4 - i386/linux).
Content-Length: 0.
.
U 192.168.8.35:5060 -> 192.168.7.250:61903
SIP/2.0 503 Service Temporarilly Unavailable, No More Available Gateways.
Via: SIP/2.0/UDP
192.168.10.30:5060;branch=z9hG4bK-701a9765;rport=61903;received=192.168.7.25
0.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>;tag=d1bd3b96fe18e5f9baf4949f8e4468f7-0b42.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 INVITE.
Server: Sip Express Router (0.9.4 - i386/linux).
Content-Length: 0.
.
U 192.168.7.250:61903 -> 192.168.8.35:5060
ACK sip:2959770000 at 192.168.8.35 SIP/2.0.
Via: SIP/2.0/UDP 192.168.10.30:5060;branch=z9hG4bK-701a9765.
From: 2958770000 <sip:2958770000 at 192.168.8.35>;tag=d0ff6100e33025ado0.
To: <sip:2959770000 at 192.168.8.35>;tag=d1bd3b96fe18e5f9baf4949f8e4468f7-0b42.
Call-ID: c19d05bc-82926821 at 192.168.10.30.
CSeq: 101 ACK.
Max-Forwards: 70.
Contact: 2958770000 <sip:2958770000 at 192.168.10.30:5060>.
User-Agent: Linksys/PAP2-2.0.13(LSb).
Content-Length: 0.
.
# -----------------------------------------------------------------
# Standard Settings
# -----------------------------------------------------------------
debug = 3
children = 1
fork = no
log_stderror = yes
check_via = no
dns = no
rev_dns = no
sip_warning = no
# -----------------------------------------------------------------
# Server Settings
# -----------------------------------------------------------------
port = 5060
listen = 192.168.8.35
alias = 192.168.8.35
# -----------------------------------------------------------------
# Fifo Settings
# -----------------------------------------------------------------
fifo = "/tmp/ser_fifo"
fifo_mode = 0666
fifo_db_url = "mysql://root:password@192.168.8.35/ser"
# -----------------------------------------------------------------
# Module Settings
# -----------------------------------------------------------------
loadmodule "/usr/lib/ser/modules/sl.so"
loadmodule "/usr/lib/ser/modules/tm.so"
loadmodule "/usr/lib/ser/modules/rr.so"
loadmodule "/usr/lib/ser/modules/auth.so"
loadmodule "/usr/lib/ser/modules/auth_db.so"
loadmodule "/usr/lib/ser/modules/auth_radius.so"
loadmodule "/usr/lib/ser/modules/uri.so"
loadmodule "/usr/lib/ser/modules/uri_db.so"
loadmodule "/usr/lib/ser/modules/uri_radius.so"
loadmodule "/usr/lib/ser/modules/uac.so"
loadmodule "/usr/lib/ser/modules/lcr.so"
loadmodule "/usr/lib/ser/modules/acc.so"
loadmodule "/usr/lib/ser/modules/exec.so"
loadmodule "/usr/lib/ser/modules/group.so"
loadmodule "/usr/lib/ser/modules/group_radius.so"
loadmodule "/usr/lib/ser/modules/avpops.so"
loadmodule "/usr/lib/ser/modules/avp_radius.so"
loadmodule "/usr/lib/ser/modules/maxfwd.so"
loadmodule "/usr/lib/ser/modules/usrloc.so"
loadmodule "/usr/lib/ser/modules/domain.so"
loadmodule "/usr/lib/ser/modules/textops.so"
loadmodule "/usr/lib/ser/modules/options.so"
loadmodule "/usr/lib/ser/modules/registrar.so"
loadmodule "/usr/lib/ser/modules/nathelper.so"
loadmodule "/usr/lib/ser/modules/mediaproxy.so"
loadmodule "/usr/lib/ser/modules/permissions.so"
loadmodule "/usr/lib/ser/modules/speeddial.so"
loadmodule "/usr/lib/ser/modules/mysql.so"
loadmodule "/usr/lib/ser/modules/msilo.so"
loadmodule "/usr/lib/ser/modules/xlog.so"
# -----------------------------------------------------------------
# Module Parameters
# -----------------------------------------------------------------
modparam("auth", "secret", "password")
modparam("auth", "nonce_expire", 60)
modparam("auth", "rpid_prefix", "")
modparam("auth", "rpid_suffix",
";party=calling;id-type=subscriber;screen=yes")
modparam("auth", "realm_prefix", "sip.")
modparam("auth", "rpid_avp", "i:13")
modparam("auth_db", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("auth_db", "user_column", "username")
modparam("auth_db", "domain_column", "domain")
modparam("auth_db", "password_column", "password")
modparam("auth_db", "password_column_2", "ha1b")
modparam("auth_db", "calculate_ha1", 1)
modparam("auth_radius", "radius_config",
"/etc/ser/radius/radiusclient.conf")
modparam("auth_radius", "service_type", 15)
modparam("uri_db", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("uri_db", "uri_table", "uri")
modparam("uri_db", "uri_user_column", "username")
modparam("uri_db", "uri_domain_column", "domain")
modparam("uri_db", "uri_uriuser_column", "uri_user")
modparam("uri_db", "subscriber_table", "subscriber")
modparam("uri_db", "subscriber_user_column", "username")
modparam("uri_db", "subscriber_domain_column", "domain")
modparam("uri_db", "use_uri_table", 0)
modparam("uri_radius", "radius_config",
"/etc/ser/radius/radiusclient.conf")
modparam("uri_radius", "service_type", 15)
modparam("domain", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("domain", "db_mode", 0)
modparam("domain", "domain_table", "domain")
modparam("group", "db_url", "mysql://root:password@192.168.8.35/ser")
modparam("group", "table", "grp")
modparam("group", "user_column", "username")
modparam("group", "domain_column", "domain")
modparam("group", "group_column", "grp")
modparam("group", "use_domain", 0)
modparam("group_radius", "radius_config",
"/etc/ser/radius/radiusclient.conf")
modparam("group_radius", "use_domain", 0)
modparam("registrar", "nat_flag", 6)
modparam("registrar", "append_branches", 0)
modparam("registrar", "case_sensitive", 0)
modparam("registrar", "default_expires", 300)
modparam("registrar", "default_q", 100)
modparam("registrar", "max_contacts", 0)
modparam("registrar", "max_expires", 300)
modparam("registrar", "min_expires", 60)
modparam("registrar", "use_domain", 0)
modparam("registrar", "received_avp", 42)
modparam("registrar", "received_param", "received")
modparam("registrar", "retry_after", 0)
modparam("permissions", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("permissions", "db_mode", 1)
modparam("permissions", "trusted_table", "trusted")
modparam("permissions", "default_allow_file",
"/etc/ser/permissions/allow")
modparam("permissions", "default_deny_file",
"/etc/ser/permissions/deny")
modparam("permissions", "check_all_branches", 1)
modparam("permissions", "allow_suffix", ".allow")
modparam("permissions", "deny_suffix", ".deny")
modparam("usrloc", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("usrloc", "db_mode", 1)
modparam("usrloc", "desc_time_order", 1)
modparam("usrloc", "timer_interval", 30)
modparam("usrloc", "use_domain", 0)
modparam("usrloc", "user_column", "username")
modparam("usrloc", "domain_column", "domain")
modparam("usrloc", "contact_column", "contact")
modparam("usrloc", "expires_column", "expires")
modparam("usrloc", "q_column", "q")
modparam("usrloc", "callid_column", "callid")
modparam("usrloc", "cseq_column", "cseq")
modparam("usrloc", "method_column", "method")
modparam("usrloc", "flags_column", "flags")
modparam("usrloc", "user_agent_column", "user_agent")
modparam("usrloc", "received_column", "received")
modparam("avpops", "avp_url",
"mysql://root:password@192.168.8.35/ser")
modparam("avpops", "avp_aliases", "voicemail=i:500")
modparam("avpops", "avp_table", "preferences")
modparam("avpops", "uuid_column", "uuid")
modparam("avpops", "username_column", "username")
modparam("avpops", "domain_column", "domain")
modparam("avpops", "attribute_column", "attribute")
modparam("avpops", "value_column", "value")
modparam("avpops", "type_column", "type")
modparam("lcr", "db_url", "mysql://root:password@192.168.8.35/ser")
modparam("lcr", "gw_table", "gw")
modparam("lcr", "gw_name_column", "gw_name")
modparam("lcr", "ip_addr_column", "ip_addr")
modparam("lcr", "port_column", "port")
modparam("lcr", "uri_scheme_column", "uri_scheme")
modparam("lcr", "transport_column", "transport")
modparam("lcr", "grp_id_column", "grp_id")
modparam("lcr", "lcr_table", "lcr")
modparam("lcr", "prefix_column", "prefix")
modparam("lcr", "from_uri_column", "from_uri")
modparam("lcr", "priority_column", "priority")
modparam("lcr", "gw_uri_avp", "1400")
modparam("lcr", "contact_avp", "1401")
modparam("lcr", "fr_inv_timer_avp", "fr_inv_timer_avp")
modparam("lcr", "fr_inv_timer", 30)
modparam("lcr", "fr_inv_timer_next", 30)
modparam("lcr", "rpid_avp", "rpid")
modparam("rr", "enable_full_lr", 1)
modparam("rr", "append_fromtag", 1)
modparam("rr", "enable_double_rr", 1)
modparam("rr", "add_username", 0)
modparam("tm", "fr_timer", 10)
modparam("tm", "fr_inv_timer", 30)
modparam("tm", "wt_timer", 10)
modparam("tm", "delete_timer", 2)
modparam("tm", "retr_timer1p1", 1)
modparam("tm", "retr_timer1p2", 2)
modparam("tm", "retr_timer1p3", 4)
modparam("tm", "retr_timer2", 4)
modparam("tm", "noisy_ctimer", 0)
modparam("tm", "via1_matching", 1)
modparam("tm", "unix_tx_timeout", 2)
modparam("tm", "restart_fr_on_each_reply", 1)
modparam("tm", "fr_timer_avp", "callee_fr_timer")
modparam("tm", "fr_inv_timer_avp", "callee_fr_inv_timer")
modparam("tm", "tw_append", "")
modparam("acc", "db_url", "mysql://root:password@192.168.8.35/ser")
modparam("acc", "radius_config", "/etc/ser/radius/radiusclient.conf")
modparam("acc", "log_fmt", "cdfimorstup")
modparam("acc", "log_level", 1)
modparam("acc", "service_type", 15)
modparam("acc", "log_flag", 21)
modparam("acc", "log_missed_flag", 22)
modparam("acc", "db_flag", 23)
modparam("acc", "db_missed_flag", 24)
modparam("acc", "radius_flag", 25)
modparam("acc", "radius_missed_flag", 26)
modparam("acc", "report_ack", 0)
modparam("acc", "report_cancels", 1)
modparam("acc", "failed_transactions", 1)
modparam("acc", "early_media", 0)
modparam("nathelper", "rtpproxy_sock", "unix:/var/run/rtpproxy.sock")
modparam("nathelper", "rtpproxy_disable", 1)
modparam("nathelper", "natping_interval", 0)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "received_avp", 42)
modparam("nathelper", "rtpproxy_disable_tout", 60)
modparam("nathelper", "rtpproxy_tout", 1)
modparam("nathelper", "rtpproxy_retr", 5)
modparam("nathelper", "force_socket", "")
modparam("mediaproxy", "mediaproxy_socket",
"/var/run/mediaproxy.sock")
modparam("mediaproxy", "sip_asymmetrics", "/etc/ser/mediaproxy/sip")
modparam("mediaproxy", "rtp_asymmetrics", "/etc/ser/mediaproxy/rtp")
modparam("mediaproxy", "natping_interval", 30)
modparam("exec", "setvars", 1)
modparam("speeddial", "db_url",
"mysql://root:password@192.168.8.35/ser")
modparam("speeddial", "use_domain", 0)
modparam("speeddial", "user_column", "username")
modparam("speeddial", "domain_column", "domain")
modparam("speeddial", "sd_user_column", "sd_username")
modparam("speeddial", "sd_domain_column", "sd_domain")
modparam("speeddial", "new_uri_column", "new_uri")
modparam("speeddial", "domain_prefix", "sip.")
modparam("maxfwd", "max_limit", 16)
modparam("options", "accept", "*/*")
modparam("options", "accept_encoding", "")
modparam("options", "accept_language", "en")
modparam("xlog", "buf_size", 8192)
modparam("uac", "from_store_param", "vsf")
modparam("uac", "credential", "username:domain:password")
modparam("msilo", "db_url", "mysql://root:password@192.168.8.35/ser")
modparam("msilo", "db_table", "silo")
modparam("msilo", "registrar", "sip:registrar at tristarcorp.net")
modparam("msilo", "expire_time", 259200)
modparam("msilo", "check_time", 30)
modparam("msilo", "use_contact", 1)
modparam("avp_radius", "radius_config",
"/etc/ser/radius/radiusclient.conf")
modparam("avp_radius", "caller_service_type", 15)
modparam("avp_radius", "callee_service_type", 15)
# -----------------------------------------------------------------
# Main Route
# -----------------------------------------------------------------
route {
# -----------------------------------------------------------------
# Sanity Check
# -----------------------------------------------------------------
if (!mf_process_maxfwd_header("10")) {
if (method != "ACK") {
sl_send_reply("483", "Too Many Hops");
};
break;
};
if (msg:len > max_len) {
if (method != "ACK") {
sl_send_reply("513", "Message Overflow");
};
break;
};
# -----------------------------------------------------------------
# Record Route
# -----------------------------------------------------------------
if (method == "INVITE" && client_nat_test("3")) {
record_route_preset("192.168.8.35:5060;nat=yes");
} else if (method != "REGISTER") {
record_route();
};
# -----------------------------------------------------------------
# Call Tear Down
# -----------------------------------------------------------------
if (method == "BYE" || method == "CANCEL") {
end_media_session();
};
# -----------------------------------------------------------------
# Loose Routing
# -----------------------------------------------------------------
if (loose_route()) {
if (has_totag() && (method == "INVITE" || method == "ACK")) {
if (client_nat_test("3") || search("^Route:.*;nat=yes")) {
setflag(6);
use_media_proxy();
};
};
route(1);
break;
};
# -----------------------------------------------------------------
# Call Processing
# -----------------------------------------------------------------
if (uri != myself) {
route(1);
break;
};
if (uri == myself) {
if (method == "REGISTER") {
route(2);
break;
} else if (method == "REFER" || method == "INVITE" || method ==
"CANCEL") {
route(3);
break;
} else if (method == "OPTIONS") {
options_reply();
break;
};
lookup("aliases");
if (uri != myself) {
route(1);
break;
};
if (!lookup("location")) {
sl_send_reply("404", "User Not Found");
break;
};
};
route(1);
break;
}
# -----------------------------------------------------------------
# Default Message Handler
# -----------------------------------------------------------------
route[1] {
# -----------------------------------------------------------------
# Reply Routing
# -----------------------------------------------------------------
t_on_reply("1");
# -----------------------------------------------------------------
# Call Log & Accounting (log=21, sql=23, radius=25)
# -----------------------------------------------------------------
setflag(23);
# -----------------------------------------------------------------
# Relay Call
# -----------------------------------------------------------------
if (!t_relay()) {
if (method == "INVITE" || method == "ACK") {
end_media_session();
};
if (method != "REFER" && method != "INVITE" && method != "CANCEL" &&
method != "ACK") {
sl_reply_error();
};
};
}
# -----------------------------------------------------------------
# Register Message Handler
# -----------------------------------------------------------------
route[2] {
# -----------------------------------------------------------------
# Nat Test
# -----------------------------------------------------------------
if (!search("^Contact:\ +\*") && client_nat_test("7")) {
setflag(6);
fix_nated_register();
force_rport();
};
# -----------------------------------------------------------------
# Authenticate User
# -----------------------------------------------------------------
if (!allow_trusted() && !from_gw()) {
if (!www_authorize("", "subscriber")) {
www_challenge("", "1");
break;
};
consume_credentials();
};
# -----------------------------------------------------------------
# Save Registration
# -----------------------------------------------------------------
if (!save("location")) {
sl_reply_error();
};
}
# -----------------------------------------------------------------
# Invite/Cancel Message Handler
# -----------------------------------------------------------------
route[3] {
# -----------------------------------------------------------------
# Nat Fixup
# -----------------------------------------------------------------
if (client_nat_test("3")) {
setflag(7);
force_rport();
fix_nated_contact();
};
# -----------------------------------------------------------------
# Authorize Users / Setup Voicemail For Gateways
# -----------------------------------------------------------------
if (!allow_trusted() || !from_gw()) {
if (!proxy_authorize("", "subscriber")) {
proxy_challenge("", "1");
break;
};
consume_credentials();
};
# -----------------------------------------------------------------
# Check For Alias
# -----------------------------------------------------------------
lookup("aliases");
if (uri != myself) {
route(4);
break;
};
# -----------------------------------------------------------------
# Cancel Call
# -----------------------------------------------------------------
if (method == "CANCEL") {
route(1);
break;
};
# -----------------------------------------------------------------
# Check For Local User
# -----------------------------------------------------------------
lookup("location");
if (uri != myself) {
route(4);
break;
};
# -----------------------------------------------------------------
# Route Call
# -----------------------------------------------------------------
if (uri =~ "^sip:1[0-9]{10}@" || uri =~ "^sip:011") {
route(5);
break;
} else {
sl_send_reply("404", "User Not Found");
break;
};
}
# -----------------------------------------------------------------
# Media Proxy Enabler
# -----------------------------------------------------------------
route[4] {
# -----------------------------------------------------------------
# Enable Media Proxy
# -----------------------------------------------------------------
if (isflagset(6) || isflagset(7)) {
use_media_proxy();
};
route(1);
break;
}
# -----------------------------------------------------------------
# Gateway LCR Route Handler
# -----------------------------------------------------------------
route[5] {
# -----------------------------------------------------------------
# Load Pstn LCR Gateways
# -----------------------------------------------------------------
if (!load_gws()) {
sl_send_reply("500", "Internal Server Error, No PSTN Gateways");
break;
};
# -----------------------------------------------------------------
# Find Next Available Gateway
# -----------------------------------------------------------------
if (!next_gw()) {
sl_send_reply("503", "Service Temporarilly Unavailable");
break;
}
# -----------------------------------------------------------------
# Route Call
# -----------------------------------------------------------------
t_on_failure("1");
route(4);
break;
}
# -----------------------------------------------------------------
# LCR Route Failure Handler
# -----------------------------------------------------------------
failure_route[1] {
# -----------------------------------------------------------------
# Failed Call Log & Accounting (log=22, sql=24, radius=26)
# -----------------------------------------------------------------
setflag(24);
# -----------------------------------------------------------------
# Find Next Available Gateway
# -----------------------------------------------------------------
if (method == "INVITE" && t_check_status("404|408|500|503")) {
if (!next_gw()) {
t_reply("503", "Service Temporarilly Unavailable, No More Available
Gateways");
break;
};
t_on_failure("1");
route(4);
break;
};
}
# -----------------------------------------------------------------
# Reply Route
# -----------------------------------------------------------------
onreply_route[1] {
# -----------------------------------------------------------------
# Enable Media Proxy
# -----------------------------------------------------------------
if ((isflagset(6) || isflagset(7)) && (status =~
"(180)|(183)|2[0-9][0-9]")) {
if (!search("^Content-Length:\ +0")) {
use_media_proxy();
};
};
# -----------------------------------------------------------------
# Nat Fixup
# -----------------------------------------------------------------
if (client_nat_test("1")) {
fix_nated_contact();
};
}
Thank You
Anthony Dean
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