Check 3rd party payload for APRS type #428

Author: F4FXL

Diff for: src/pfilter.c

@@ -869,6 +869,19 @@ static int filt_t (pfstate_t *pf)
 
 	assert (infop != NULL);
 
+	if(*infop == '}') {
+		// We have a 3d party packet, dig inside it to get the actual type.
+		packet_t pp_payload = ax25_from_text ((char*)infop+1, 0);
+		if (pp_payload == NULL) {
+			print_error (pf, "Invalid third party payload\n");
+			return (0);
+		}
+		memset (src, 0, sizeof(src));
+		ax25_get_addr_with_ssid (pp_payload, AX25_SOURCE, src);
+		(void) ax25_get_info (pp_payload, (unsigned char **)(&infop));
+		ax25_delete(pp_payload);
+	}
+
 	for (f = pf->token_str + 2; *f != '\0'; f++) {
 	  switch (*f) {