1 files changed, 34 insertions, 0 deletions
diff --git a/networking/udhcp/d6_socket.c b/networking/udhcp/d6_socket.c
new file mode 100644
index 0000000..56f69f6
--- /dev/null
+++ b/networking/udhcp/d6_socket.c
@@ -0,0 +1,34 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright (C) 2011 Denys Vlasenko.
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+#include "common.h"
+#include "d6_common.h"
+#include <net/if.h>
+
+int FAST_FUNC d6_listen_socket(int port, const char *inf)
+{
+	int fd;
+	struct sockaddr_in6 addr;
+
+	log1("Opening listen socket on *:%d %s", port, inf);
+	fd = xsocket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+
+	setsockopt_reuseaddr(fd);
+	if (setsockopt_broadcast(fd) == -1)
+		bb_perror_msg_and_die("SO_BROADCAST");
+
+	/* NB: bug 1032 says this doesn't work on ethernet aliases (ethN:M) */
+	if (setsockopt_bindtodevice(fd, inf))
+		xfunc_die(); /* warning is already printed */
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin6_family = AF_INET6;
+	addr.sin6_port = htons(port);
+	/* addr.sin6_addr is all-zeros */
+	xbind(fd, (struct sockaddr *)&addr, sizeof(addr));
+
+	return fd;
+}