Add an option to ignore incomplete dialogs

Some power users don't want to open sngrep and see calls starting
with a response message. Meh.

config/sngreprc

@@ -50,6 +50,15 @@
 # set cl.column5 starting
 # set cl.column5.width 15
 
+
+##-----------------------------------------------------------------------------
+## Default minimun size from Message info in Call Flow panel
+# set cf.rawminwidth 100
+
+##-----------------------------------------------------------------------------
+## Ignore dialogs that does not start with a request method
+# set sip.ignoreincomplete 1
+
 ##-----------------------------------------------------------------------------
 ## You can ignore some calls with any of the previous attributes with a given
 ## value with ignore directive.

src/option.c

@@ -65,14 +65,19 @@ init_options()
     // Set Autoscroll in call list
     set_option_value("cl.autoscroll", "on");
     set_option_value("cl.scrollstep", "10");
+    set_option_value("cl.defexitbutton", "1");
 
     // Raw options for Call flow screen
     set_option_value("cf.forceraw", "on");
     set_option_value("cf.rawminwidth", "100");
     set_option_value("cf.splitcallid", "off");
 
+    // Allow dialogs to be incomplete
+    set_option_value("sip.ignoreincomlete", "0");
+
     // Read options from configuration files
     read_options("/etc/sngreprc");
+    read_options("/usr/local/etc/sngreprc");
     read_options("/root/.sngreprc");
 
     return 0;

src/sip.c

@@ -188,6 +188,20 @@ sip_load_message(const char *header, const char *payload)
 
     // Find the call for this msg
     if (!(call = call_find_by_callid(callid))) {
+
+        // Only create a new call if the first msg
+        // is a request message in the following gorup
+        if (get_option_int_value("sip.ignoreincomplete")) {
+            const char *method = msg_get_attribute(msg, SIP_ATTR_METHOD);
+            if (method && strcasecmp(method, "INVITE")
+                && strcasecmp(method, "REGISTER") && strcasecmp(method, "SUBSCRIBE")
+                && strcasecmp(method, "OPTIONS") && strcasecmp(method, "PUBLISH")
+                && strcasecmp(method, "MESSAGE") && strcasecmp(method, "NOTIFY")){
+                //@todo sip_msg_destroy();
+                return NULL;
+            }
+        }
+
         // Create the call if not found
         if (!(call = sip_call_create(callid))) {
             //@todo sip_msg_destroy();