[Serusers] Mediaproxy

[giAndrea]

At 17.22 26/05/2004 +0200, Martin Rusnak wrote:
>ser uses a unix socket to talk to mediaproxy. You can specify socket file 
>as a parameter --socket when starting mediaproxy (the default is 
>/var/run/ser/mediaproxy.sock). And inside ser.cfg you should specify the 
>file for the mediaproxy module, for example:
>
>modparam("mediaproxy", "mediaproxy_socket", "/var/run/ser/mediaproxy.sock")

i've already inserted this row on my ser.cfg.



# ----------- global configuration parameters ------------------------

debug=9
fork=no
log_stderror=yes

check_via=no
dns=no
rev_dns=no
port=5060
children=4
fifo="/tmp/ser_fifo"

# ------------------ module loading ----------------------------------

loadmodule "/usr/lib/ser/modules/mysql.so"
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/maxfwd.so"
loadmodule "/usr/lib/ser/modules/usrloc.so"
loadmodule "/usr/lib/ser/modules/registrar.so"
loadmodule "/usr/lib/ser/modules/textops.so"

# mysql.so must be loaded !
loadmodule "/usr/lib/ser/modules/auth.so"
loadmodule "/usr/lib/ser/modules/auth_db.so"

# !! MediaProxy
loadmodule "/usr/lib/ser/modules/domain.so"
loadmodule "/usr/lib/ser/modules/mediaproxy.so"

# !! Nathelper
loadmodule "/usr/lib/ser/modules/nathelper.so"


# ----------------- setting module-specific parameters ---------------

# -- usrloc params --
modparam("usrloc", "db_mode", 2)

# -- auth params --
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")

# -- rr params --
# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)

# !! Nathelper
modparam("registrar", "nat_flag", 6)
modparam("nathelper", "natping_interval", 30) # Ping interval 30 s
modparam("nathelper", "ping_nated_only", 1)   # Ping only clients behind NAT

# !! MediaProxy
modparam("mediaproxy", "mediaproxy_socket", "/var/run/proxydispatcher.sock")
modparam("mediaproxy", "sip_asymmetrics", "/etc/ser/sip-asymmetrics-clients")
modparam("mediaproxy", "rtp_asymmetrics", "/etc/ser/rtp-asymmetrics-clients")
modparam("mediaproxy", "natping_interval", 20)



# -------------------------  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");
                 break;
         };
         if (msg:len >=  max_len ) {
                 sl_send_reply("513", "Message too big");
                 break;
         };

         # !! 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 (client_nat_test("3")) { #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 (method == "REGISTER" || ! search("^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".

                     fix_contact(); # fix_nated_contact(); # Rewrite 
contact with source IP of signalling
                     if (method == "INVITE") {
                         fix_nated_sdp("1"); # Add direction=active to SDP
                     };
                     force_rport(); # Add rport parameter to topmost Via
                     setflag(6);    # Mark as NATed
                 };
         };

         # 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 (!method=="REGISTER") record_route();

         # 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);
                 break;
         };

         if (!uri==myself) {
                 # mark routing logic in request
                 append_hf("P-hint: outbound\r\n");
                 route(1);
                 break;
         };

         # 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 (method=="REGISTER") {

                         if (!www_authorize("webby.spidlink.com", 
"subscriber")) {
                                 www_challenge("webby.spidlink.com", "0");
                                 break;
                         };

                         save("location");
                         break;
                 };

                 # lookup("aliases");
                 if (!uri==myself) {
                         append_hf("P-hint: outbound alias\r\n");
                         route(1);
                         break;
                 };

                 # native SIP destinations are handled using our USRLOC DB
                 if (!lookup("location")) {
                         sl_send_reply("404", "Not Found");
                         break;
                 };
         };
         append_hf("P-hint: usrloc applied\r\n");
         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");
             break;
         };

         # if client or server know to be behind a NAT, enable relay
         if (isflagset(6)) {
             use_media_proxy(); # sostituisce force_rtp_proxy();
         };

         # 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 (isflagset(6) && status =~ "(183)|2[0-9][0-9]") {
         fix_contact(); # sostituisce fix_nated_contact();
         use_media_proxy(); # sostituisce force_rtp_proxy();
     # otherwise, is it a transaction behind a NAT and we did not
     # know at time of request processing ? (RFC1918 contacts)
     } else if (client_nat_test("1")) { # sostituisce (nat_uac_test("1")) {
         fix_contact(); # sostituisce fix_nated_contact();
     };
}