Fix --connect-send. Half-close connections so we can detect two read sockets talking to each other.

adsbus/opts.c

@@ -76,7 +76,7 @@ bool opts_add_connect_send(char *arg) {
 		return false;
 	}
 
-	incoming_new(host, arg, send_new_wrapper, serializer);
+	outgoing_new(host, arg, send_new_wrapper, serializer);
 	free(host);
 	return true;
 }

adsbus/outgoing.c

@@ -78,8 +78,7 @@ static void outgoing_disconnect_handler(struct peer *peer) {
 		assert(!close(outgoing->peer.fd));
 	}
 	fprintf(stderr, "O %s: Peer disconnected; reconnecting...\n", outgoing->id);
-
-	outgoing_resolve(outgoing);
+	outgoing_retry(outgoing);
 }
 
 static void outgoing_connect_result(struct outgoing *outgoing, int result) {

adsbus/receive.c

@@ -1,7 +1,9 @@
-#include <stdlib.h>
-#include <stdio.h>
 #include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <sys/socket.h>
 #include <unistd.h>
 
 #include "airspy_adsb.h"
@@ -127,6 +129,9 @@ void receive_cleanup() {
 }
 
 void receive_new(int fd, void *unused, struct peer *on_close) {
+	int res = shutdown(fd, SHUT_WR);
+	assert(res == 0 || (res == -1 && errno == ENOTSOCK));
+
 	struct receive *receive = malloc(sizeof(*receive));
 	assert(receive);
 

adsbus/send.c

@@ -1,10 +1,12 @@
-#include <stdbool.h>
-#include <stdlib.h>
 #include <assert.h>
-#include <strings.h>
-#include <stdio.h>
-#include <unistd.h>
+#include <errno.h>
 #include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/socket.h>
+#include <unistd.h>
 
 #include "airspy_adsb.h"
 #include "beast.h"
@@ -115,6 +117,9 @@ struct serializer *send_get_serializer(char *name) {
 }
 
 void send_new(int fd, struct serializer *serializer, struct peer *on_close) {
+	int res = shutdown(fd, SHUT_RD);
+	assert(res == 0 || (res == -1 && errno == ENOTSOCK));
+
 	struct send *send = malloc(sizeof(*send));
 	assert(send);