[OpenSIPS-Users] Opensips 488 Not acceptable here
Bogdan Chifor
chiforbogdan86 at gmail.com
Thu Jun 6 19:26:00 CEST 2013
Hello,
I am using OpenSIPs as a SIP server solution.I just finished a server
configuration which permits NAT traversal (I used RTP proxy)(on Debian).
As a SIP client application I am using CSipSimple(Android) (which uses
PJSUA as backend solution).
The setup works fine and the NAT traversal problem is solved. (I am able to
call from a 3G network provider to my wireless LAN-it uses NAT on both
sides and it works great).
However sometimes I am getting the 488 Not acceptable here error. Sometimes
this error appears even when both of the phones are in the same LAN.
Also this error appeared when I called from the 3G network operator to my
wireless LAN.(when I called from my wireless LAN to the 3G operator it
worked fine).
The conclusion is that I cannot replicate this error every time.
I know that is a SDP issue.
Here is my opensips.cfg
#
# $Id: nathelper.cfg 9345 2012-10-18 20:24:22Z osas $
#
# simple quick-start config script including nathelper support
# This default script includes nathelper support. To make it work
# you will also have to install Maxim's RTP proxy. The proxy is enforced
# if one of the parties is behind a NAT.
#
# If you have an endpoing in the public internet which is known to
# support symmetric RTP (Cisco PSTN gateway or voicemail, for example),
# then you don't have to force RTP proxy. If you don't want to enforce
# RTP proxy for some destinations than simply use t_relay() instead of
# route(1)
#
# Sections marked with !! Nathelper contain modifications for nathelper
#
# NOTE !! This config is EXPERIMENTAL !
#
# ----------- global configuration parameters ------------------------
debug=5
log_stderror=no
log_facility=LOG_LOCAL0
#log_name=opensips.log
fork=yes
children=4
/* uncomment the following lines to enable debugging */
#debug=6
#fork=no
#log_stderror=yes
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
#port=5060
listen=udp:195.95.167.214:8899
#advertised_address="195.95.167.194"
#advertised_port=5060
port=8899
children=4
disable_tcp=yes
alias=voip.certsign.ro
alias=195.95.167.214
#alias=192.168.185.26
# ------------------ module loading ----------------------------------
#set module path
mpath="/usr/lib/opensips/modules/"
# Uncomment this if you want to use SQL database
loadmodule "db_mysql.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "signaling.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "textops.so"
loadmodule "mi_fifo.so"
loadmodule "sipmsgops.so"
loadmodule "dialog.so"
loadmodule "avpops.so"
loadmodule "domain.so"
#loadmodule "xlog.so"
loadmodule "acc.so"
# Uncomment this if you want digest authentication
# db_mysql.so must be loaded !
loadmodule "auth.so"
loadmodule "auth_db.so"
# !! Nathelper
loadmodule "nathelper.so"
loadmodule "rtpproxy.so"
# ----------------- setting module-specific parameters ---------------
# -- mi_fifo params --
modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
# -- usrloc params --
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "db_url", "mysql://opensips:qwe123@localhost/opensips")
# -- auth params --
# Uncomment if you are using auth module
modparam("auth_db", "calculate_ha1", yes)
#
# If you set "calculate_ha1" parameter to yes (which true in this config),
# uncomment also the following parameter)
modparam("auth_db", "password_column", "password")
modparam("auth_db", "db_url", "mysql://opensips:qwe123@localhost/opensips")
modparam("auth_db", "load_credentials", "")
db_default_url="mysql://opensips:qwe123@localhost/opensips"
#
# !! Nathelper
#
modparam("usrloc", "nat_bflag", 6)
modparam("nathelper", "ping_nated_only", 1) # Ping only clients behind NAT
modparam("nathelper", "sipping_bflag", 8)
modparam("nathelper", "received_avp", "$avp(i:801)")
# RTPProxy setup
#modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:7789")
modparam("nathelper", "force_socket", "udp:127.0.0.1:7789")
modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7789")
modparam("rtpproxy", "rtpproxy_autobridge", 1)
modparam("rtpproxy", "rtpproxy_timeout", "0.5")
modparam("rtpproxy", "rtpproxy_retr", 3)
#
# ------- dialog --------
#**
modparam("dialog", "db_mode", 1)
modparam("dialog", "db_update_period", 30)
#modparam("dialog", "dlg_flag", 4)
modparam("dialog", "dlg_match_mode", 1)
#
# --> avpops params -----
#**
modparam("avpops", "avp_table", "usr_preferences")
modparam("avpops", "use_domain", 1)
# ************
# ----- presence params -----
/* uncomment the following lines if you want to enable presence */
#modparam("presencepresence_xml", "db_url",
# "mysql://opensips:opensipsrw@localhost/opensips")
#modparam("presence_xml", "force_active", 1)
#modparam("presence", "server_address", "sip:localhost:5060")
# ------------------------- request routing logic -------------------
# main routing logic
route{
# initial sanity checks -- messages with
# max_forwards==0, or excessively long requests
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
};
if (msg:len >= 2048 ) {
sl_send_reply("513", "Message too big");
exit;
};
# !! Nathelper
# Special handling for NATed clients; first, NAT test is
# executed: it looks for via!=received and RFC1918 addresses
# in Contact (may fail if line-folding is used); also,
# the received test should, if completed, should check all
# vias for rpesence of received
#if (nat_uac_test("3")) {
# Allow RR-ed requests, as these may indicate that
# a NAT-enabled proxy takes care of it; unless it is
# a REGISTER
if (is_method("REGISTER") ||
!is_present_hf("Record-Route")) {
log("LOG:Someone trying to register from private
IP, rewriting\n");
# This will work only for user agents that support
symmetric
# communication. We tested quite many of them and
majority is
# smart enough to be symmetric. In some phones it
takes a
# configuration option. With Cisco 7960, it is
called
# NAT_Enable=Yes, with kphone it is called
"symmetric media" and
# "symmetric signalling".
# Rewrite contact with source IP of signalling
fix_nated_contact();
if ( is_method("INVITE") ) {
log("@DEBUG:FIX SDP");
fix_nated_sdp("2"); # Add direction=active
to SDP
};
force_rport(); # Add rport parameter to topmost Via
setbflag(6); # Mark as NATed
# if you want sip nat pinging
# setbflag(8);
};
#};
# subsequent messages withing a dialog should take the
# path determined by record-routing
if (loose_route()) {
# mark routing logic in request
append_hf("P-hint: rr-enforced\r\n");
route(1);
exit;
};
# we record-route all messages -- to make sure that
# subsequent messages will go through our proxy; that's
# particularly good if upstream and downstream entities
# use different transport protocol
if (!is_method("REGISTER"))
record_route();
if (!uri==myself) {
# mark routing logic in request
append_hf("P-hint: outbound\r\n");
route(1);
exit;
};
# if the request is for other domain use UsrLoc
# (in case, it does not work, use the following command
# with proper names and addresses in it)
if (uri==myself) {
if (is_method("REGISTER")) {
# Uncomment this if you want to use digest
authentication
#if (!www_authorize("siphub.org", "subscriber")) {
# www_challenge("siphub.org", "0");
# return;
#};
save("location");
exit;
};
lookup("aliases");
if (!uri==myself) {
append_hf("P-hint: outbound alias\r\n");
route(1);
exit;
};
# native SIP destinations are handled using our USRLOC DB
if (!lookup("location")) {
sl_send_reply("404", "Not Found");
exit;
};
};
append_hf("P-hint: usrloc applied\r\n");
log("@DEBUG:LINE BEFORE ROUTE[1]");
route(1);
}
route[1]
{
# !! Nathelper
if (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" &&
!search("^Route:")){
sl_send_reply("479", "We don't forward to private IP
addresses");
exit;
};
# if client or server know to be behind a NAT, enable relay
if (isbflagset(6)){
if (is_method("INVITE")) {
log("@DEBUG:INVITE METHOD");
if (has_body("application/sdp")) {
log("@DEBUG:application/sdp");
if (rtpproxy_offer("195.95.167.214")) {
t_on_reply("2");
log("@DEBUG:RTP PROXY OFFER");
}
} else {
t_on_reply("3");
}
}
if (is_method("ACK") && has_body("application/sdp"))
rtpproxy_answer();
};
# NAT processing of replies; apply to all transactions (for example,
# re-INVITEs from public to private UA are hard to identify as
# NATed at the moment of request processing); look at replies
t_on_reply("1");
# send it out now; use stateful forwarding as it works reliably
# even for UDP2TCP
if (!t_relay()) {
sl_reply_error();
};
}
# !! Nathelper
onreply_route[1] {
# NATed transaction ?
if (isbflagset(6) && status =~ "(183)|2[0-9][0-9]") {
fix_nated_contact();
rtpproxy_answer();
# otherwise, is it a transaction behind a NAT and we did not
# know at time of request processing ? (RFC1918 contacts)
} else if (nat_uac_test("1")) {
fix_nated_contact();
};
}
onreply_route[2]
{
if (has_body("application/sdp"))
rtpproxy_answer("195.95.167.214");
}
onreply_route[3]
{
if (has_body("application/sdp"))
rtpproxy_offer("195.95.167.214");
}
Please help me.
Thank you very much,
Chifor Bogdan
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