Issue 298 - Add beacon SOURCE option to override AX.25 source.

src/beacon.c

@@ -804,7 +804,12 @@ static void beacon_send (int j, dwgps_info_t *gpsinfo)
  * 	src > dest [ , via ]
  */
 
-	      strlcpy (beacon_text, mycall, sizeof(beacon_text));
+	      if (bp->source != NULL) {
+	        strlcpy (beacon_text, bp->source, sizeof(beacon_text));
+	      }
+	      else {
+	        strlcpy (beacon_text, mycall, sizeof(beacon_text));
+	      }
 	      strlcat (beacon_text, ">", sizeof(beacon_text));
 
 	      if (bp->dest != NULL) {

src/config.c

@@ -5273,6 +5273,8 @@ static int beacon_options(char *cmd, struct beacon_s *b, int line, struct audio_
 	b->freq = G_UNKNOWN;
 	b->tone = G_UNKNOWN;
 	b->offset = G_UNKNOWN;
+	b->source = NULL;
+	b->dest = NULL;
 
 	while ((t = split(NULL,0)) != NULL) {
 
@@ -5344,6 +5346,17 @@ static int beacon_options(char *cmd, struct beacon_s *b, int line, struct audio_
 	       b->sendto_chan = n;
 	    }
 	  }
+	  else if (strcasecmp(keyword, "SOURCE") == 0) {
+	    b->source = strdup(value);
+	    for (p = b->source; *p != '\0'; p++) {
+	      if (islower(*p)) {
+	        *p = toupper(*p);	/* silently force upper case. */
+	      }
+	    }
+	    if (strlen(b->source) > 9) {
+	       b->source[9] = '\0';
+	    }
+	  }
 	  else if (strcasecmp(keyword, "DEST") == 0) {
 	    b->dest = strdup(value);
 	    for (p = b->dest; *p != '\0'; p++) {

src/config.h

@@ -160,6 +160,9 @@ struct misc_config_s {
 
 	  time_t next;		/* Unix time to transmit next one. */
 
+	  char *source;		/* NULL or explicit AX.25 source address to use */
+				/* instead of the mycall value for the channel. */
+
 	  char *dest;		/* NULL or explicit AX.25 destination to use */
 				/* instead of the software version such as APDW11. */