X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fcontrol.c;h=86224c29f46d82ccdd0f42f3b8990296d19ba3a0;hb=f6020a5224c9c4c17c11c5f9d2c8441638ac04fc;hp=277f7cb5d025cfac168bc9f4f003e416993a519b;hpb=f4010694b3b16453e5e6298c208910264e326978;p=tinc

diff --git a/src/control.c b/src/control.c
index 277f7cb5..86224c29 100644
--- a/src/control.c
+++ b/src/control.c
@@ -26,6 +26,7 @@
 #include "logger.h"
 #include "meta.h"
 #include "net.h"
+#include "netutl.h"
 #include "protocol.h"
 #include "route.h"
 #include "splay_tree.h"
@@ -33,7 +34,7 @@
 #include "xalloc.h"
 
 char controlcookie[65];
-extern char *controlcookiename;
+extern char *pidfilename;
 
 static bool control_return(connection_t *c, int type, int error) {
 	return send_request(c, "%d %d %d", CONTROL, type, error);
@@ -133,26 +134,49 @@ bool control_h(connection_t *c, char *request) {
 bool init_control(void) {
 	randomize(controlcookie, sizeof controlcookie / 2);
 	bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
-	controlcookie[sizeof controlcookie - 1] = 0;
 
-	FILE *f = fopen(controlcookiename, "w");
+	FILE *f = fopen(pidfilename, "w");
 	if(!f) {
-		logger(LOG_ERR, "Cannot write control socket cookie file %s: %s", controlcookiename, strerror(errno));
+		logger(LOG_ERR, "Cannot write control socket cookie file %s: %s", pidfilename, strerror(errno));
 		return false;
 	}
 
 #ifdef HAVE_FCHMOD
 	fchmod(fileno(f), 0600);
 #else
-	chmod(controlcookiename, 0600);
+	chmod(pidfilename, 0600);
 #endif
+	// Get the address and port of the first listening socket
+
+	char *localhost = NULL;
+	sockaddr_t sa;
+	socklen_t len = sizeof sa;
+
+	// Make sure we have a valid address, and map 0.0.0.0 and :: to 127.0.0.1 and ::1.
+
+	if(getsockname(listen_socket[0].tcp, (struct sockaddr *)&sa, &len)) {
+		xasprintf(&localhost, "127.0.0.1 port %d", myport);
+	} else {
+		if(sa.sa.sa_family == AF_INET) {
+			if(sa.in.sin_addr.s_addr == 0)
+				sa.in.sin_addr.s_addr = htonl(0x7f000001);
+		} else if(sa.sa.sa_family == AF_INET6) {
+			static const uint8_t zero[16] = {0};
+			if(!memcmp(sa.in6.sin6_addr.s6_addr, zero, sizeof zero))
+				sa.in6.sin6_addr.s6_addr[15] = 1;
+		}
+
+		localhost = sockaddr2hostname(&sa);
+	}
+
+	fprintf(f, "%d %s %s\n", (int)getpid(), controlcookie, localhost);
 
-	fprintf(f, "%s %s %d\n", controlcookie, myport, getpid());
+	free(localhost);
 	fclose(f);
 
 	return true;
 }
 
 void exit_control(void) {
-	unlink(controlcookiename);
+	unlink(pidfilename);
 }