1 /* vi: set sw=4 ts=4: */
2 /*
3 * Copyright (C) 2011 Denys Vlasenko.
4 *
5 * Licensed under GPLv2, see file LICENSE in this source tree.
6 */
7 #include "common.h"
8 #include "d6_common.h"
9 #include <net/if.h>
10
d6_listen_socket(int port,const char * inf)11 int FAST_FUNC d6_listen_socket(int port, const char *inf)
12 {
13 int fd;
14 struct sockaddr_in6 addr;
15
16 log1("opening listen socket on *:%d %s", port, inf);
17 fd = xsocket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
18
19 setsockopt_reuseaddr(fd);
20 if (setsockopt_broadcast(fd) == -1)
21 bb_perror_msg_and_die("SO_BROADCAST");
22
23 /* NB: bug 1032 says this doesn't work on ethernet aliases (ethN:M) */
24 if (setsockopt_bindtodevice(fd, inf))
25 xfunc_die(); /* warning is already printed */
26
27 memset(&addr, 0, sizeof(addr));
28 addr.sin6_family = AF_INET6;
29 addr.sin6_port = htons(port);
30 /* addr.sin6_addr is all-zeros */
31 xbind(fd, (struct sockaddr *)&addr, sizeof(addr));
32
33 return fd;
34 }
35