Fixed no rf-gate w/o digi bug

Turns out that when configured as an I-gate and NOT as a digipeater,
aprx didn't add any heard stations to the historydb, since the receiver
wasn't a source for the transmitter. This made being an implicit RF-gate
without being a digipeater impossible.

Author: PhirePhly

aprx.h

@@ -667,6 +667,7 @@ extern int  digipeater_config(struct configfile *cf);
 extern void digipeater_receive(struct digipeater_source *src, struct pbuf_t *pb);
 extern int  digipeater_receive_filter(struct digipeater_source *src, struct pbuf_t *pb);
 extern dupecheck_t *digipeater_find_dupecheck(const struct aprx_interface *aif);
+extern struct digipeater* digipeater_find_by_iface(const struct aprx_interface *aif);
 
 /* interface.c */
 

digipeater.c

@@ -1672,6 +1672,18 @@ dupecheck_t *digipeater_find_dupecheck(const struct aprx_interface *aif)
 	return NULL;
 }
 
+struct digipeater* digipeater_find_by_iface(const struct aprx_interface *aif) {
+	int i;
+	for (i = 0; i < digi_count; i++) {
+		if (aif == digis[i]->transmitter)
+			return digis[i];
+	}
+
+	if (debug > 1) printf(" Failed to find digipeater by aprx_interface\n");
+	return NULL;
+}
+
+
 static void digipeater_resettime(void *arg)
 {
 	struct timeval *tv = (struct timeval *)arg;

interface.c

@@ -1007,6 +1007,20 @@ void interface_receive_ax25(const struct aprx_interface *aif,
 	if (aif == NULL) return;         // Not a real interface for digi use
 	if (aif->digisourcecount == 0) {
 		if (debug>1) printf("interface_receive_ax25() no receivers for source %s\n",aif->callsign);
+
+		if (!is_aprs) return;
+		if (debug > 1) printf("  Adding to histroydb anyways...");
+		struct digipeater *digi = digipeater_find_by_iface(aif);
+		if (digi == NULL) return;
+		historydb_t *historydb = digi->historydb;
+		struct pbuf_t *pb = pbuf_new(is_aprs, digi_like_aprs,
+				tnc2addrlen, tnc2buf, tnc2len,
+				axaddrlen, axbuf, axlen);
+		if (pb == NULL) return;
+		pb->source_if_group = aif->ifgroup;
+		parse_aprs(pb, historydb);
+		historydb_insert_heard(historydb, pb);
+		pbuf_put(pb);
 		return; // No receivers for this source
 	}