add a block component

allow to view msg buf in logs & block misconfigured devices

kamailio/block.cfg

@@ -0,0 +1,43 @@
+######## BLOCK BY IP[PORT] ########
+
+#!ifndef KZ_BLOCK_DISABLE
+
+#!trydef KZ_BLOCK_ENABLE 1
+#!trydef KZ_BLOCK_LOG_LEVEL 1
+#!trydef KZ_BLOCK_LOG_BUFFER 0
+#!trydef KZ_BLOCK_DRY_RUN 0
+
+#!ifdef KZ_BLOCK_COLD_CACHE
+#!substdef "!BLOCK_S_WARM_CACHE!!g" 
+#!else
+#!substdef "!BLOCK_S_WARM_CACHE!dbtable=block_cache;dbmode=1;!g"
+#!endif
+
+modparam("htable", "htable", "block=>size=8;BLOCK_S_WARM_CACHE")
+modparam("statistics","variable", "block:blocked_requests")
+
+kazoo.block_enable = KZ_BLOCK_ENABLE descr "enable block processing"
+kazoo.block_log_level = KZ_BLOCK_LOG_LEVEL descr "block log level"
+kazoo.block_log_buffer = KZ_BLOCK_LOG_BUFFER descr "log the received buffer"
+kazoo.block_dry_run = KZ_BLOCK_DRY_RUN descr "log but keep processing"
+
+## global param to enable route
+received_route_mode=1
+
+event_route[core:msg-received]
+{
+  if($sel(cfg_get.kazoo.block_enable) == 1) {
+     if($sht(block=>$rcv(srcip)) || $sht(block=>$rcv(srcip)::$rcv(srcport))) {
+         if($sel(cfg_get.kazoo.block_log_buffer) == 1) {
+            xlog("$(sel(cfg_get.kazoo.block_log_level){s.int})", "|block|request from [$rcv(srcip):$rcv(srcport)] to [$rcv(rcvip):$rcv(rcvport)] was blocked => [$rcv(buf)]\n");
+         } else {
+            xlog("$(sel(cfg_get.kazoo.block_log_level){s.int})", "|block|request from [$rcv(srcip):$rcv(srcport)] to [$rcv(rcvip):$rcv(rcvport)] was blocked\n");
+         }
+         if($sel(cfg_get.kazoo.block_dry_run) == 0) {
+            drop;
+         }
+     }
+  }
+}
+
+#!endif

kamailio/default.cfg

@@ -269,6 +269,8 @@ include_file "sip_trace-role.cfg"
 ## auth ##
 include_file "auth.cfg"
 
+## block ##
+include_file "block.cfg"
 
 ####### Permissions module ##########
 loadmodule "permissions.so"