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142 lines
4.3 KiB
142 lines
4.3 KiB
######## Generic Hash Table container in shared memory ########
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modparam("htable", "htable", "failover=>size=16;autoexpire=120")
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####### Dispatcher module ########
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loadmodule "dispatcher.so"
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modparam("dispatcher", "list_file", "/etc/kazoo/kamailio/dispatcher.list")
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modparam("dispatcher", "flags", 2)
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modparam("dispatcher", "use_default", 0)
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modparam("dispatcher", "force_dst", 1)
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modparam("dispatcher", "dst_avp", "$avp(ds_dst)")
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modparam("dispatcher", "attrs_avp", "$avp(ds_attrs)")
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modparam("dispatcher", "grp_avp", "$avp(ds_grp)")
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modparam("dispatcher", "cnt_avp", "$avp(ds_cnt)")
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modparam("dispatcher", "hash_pvar", "$avp(ds_grp)")
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# modparam("dispatcher", "setid_pvar", "$var(setid)")
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modparam("dispatcher", "ds_ping_method", "OPTIONS")
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modparam("dispatcher", "ds_ping_interval", 10)
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modparam("dispatcher", "ds_probing_threshhold", 3)
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modparam("dispatcher", "ds_probing_mode", 1)
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modparam("dispatcher", "ds_ping_reply_codes", "501,403,404,400,200")
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####### Dispatcher Logic ########
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route[DISPATCHER_CLASSIFY_SOURCE]
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{
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if (ds_is_from_list("1", "1") || ds_is_from_list("3", "1")) {
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xlog("L_INFO", "$ci|log|originated from internal sources");
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setflag(FLAG_INTERNALLY_SOURCED);
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} else {
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xlog("L_INFO", "$ci|log|originated from external sources");
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}
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}
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# Take the routes from dispatcher - hash over callid
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# If prefered route defined, reorder the destionations
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route[DISPATCHER_FIND_ROUTES]
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{
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if ($sht(failover=>$ci::current) != $null) {
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$du = $sht(failover=>$ci::current);
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return;
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}
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if (!ds_select_dst("1", "0")) {
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xlog("L_ERR", "$ci|end|no servers avaliable");
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sl_send_reply("480", "All servers busy");
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exit;
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}
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$var(contact_uri) = $(ct{tobody.user}) + "@" + $(ct{tobody.host});
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$var(from_uri) = @from.uri.user + "@" + @from.uri.host;
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if ($sht(associations=>$var(from_uri)) != $null) {
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$var(association) = $var(from_uri);
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route(DISPATCHER_REORDER_ROUTES);
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} else if ($sht(associations=>$var(contact_uri)) != $null) {
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$var(association) = $var(contact_uri);
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route(DISPATCHER_REORDER_ROUTES);
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}
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}
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route[DISPATCHER_REORDER_ROUTES]
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{
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$var(i) = 0;
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$var(found) = 0;
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while($(avp(ds_dst)[$var(i)]) != $null) {
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if($(avp(ds_dst)[$var(i)]) != $var(prefered_route)) {
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$avp(tmp_ds_dst) = $(avp(ds_dst)[$var(i)]);
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} else {
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$var(found) = 1;
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}
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$var(i) = $var(i) + 1;
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}
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if ($var(found)) {
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xlog("L_INFO", "$ci|log|re-ordering the dispatcher list to keep associated server first");
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$(avp(ds_dst)[*]) = $null;
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$var(i) = 0;
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while($(avp(tmp_ds_dst)[$var(i)]) != $null) {
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$avp(ds_dst) = $(avp(tmp_ds_dst)[$var(i)]);
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$var(i) = $var(i) + 1;
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}
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$avp(ds_dst) = $var(prefered_route);
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$du = $var(prefered_route);
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$(avp(tmp_ds_dst)[*]) = $null;
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} else {
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xlog("L_INFO", "$ci|log|associated media server is inactive, moving to $rd");
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$sht(associations=>$var(contact_uri)) = $null;
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}
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}
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route[DISPATCHER_NEXT_ROUTE]
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{
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$var(failover_count) = $sht(failover=>$ci::counts);
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if ($sht(failover=>$ci::counts) == $null) {
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$var(i) = 0;
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while($(avp(ds_dst)[$var(i)]) != $null) {
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$sht(failover=>$ci[$var(i)]) = $(avp(ds_dst)[$var(i)]);
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$var(i) = $var(i) + 1;
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if ($var(i) >= 3) {
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break;
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}
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}
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$sht(failover=>$ci::counts) = $var(i);
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$var(failover_count) = $var(i);
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}
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# try to find a new media server to send the call to
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if ($var(failover_count) > 1) {
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$var(failover_count) = $var(failover_count) - 1;
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$du = $sht(failover=>$ci[$var(failover_count)]);
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$sht(failover=>$ci::counts) = $var(failover_count);
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$sht(failover=>$ci::current) = $du;
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xlog("L_INFO", "$ci|log|remaining failed retry attempts: $var(failover_count)");
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xlog("L_INFO", "$ci|log|routing call to next media server $du");
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setflag(FLAG_SKIP_NAT_CORRECTION);
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# reset the final reply timer
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$avp(final_reply_timer) = 3;
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t_on_reply("INTERNAL_REPLY");
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t_on_failure("INTERNAL_FAULT");
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# relay the request to the new media server
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route(EXTERNAL_TO_INTERNAL_RELAY);
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exit();
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}
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}
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## vim:set tabstop=4 softtabstop=4 shiftwidth=4 expandtab
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