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udhcp[cd]: fix binding to network aliases. Closes 5432, 5438

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2012-08-10 00:27:22 +02:00
parent 4919565c15
commit 6567edd10b
1 changed files with 9 additions and 1 deletions
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10
networking/udhcp/socket.c
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@ -80,6 +80,7 @@ int FAST_FUNC udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf)
{
int fd;
struct sockaddr_in addr;
char *colon;
log1("Opening listen socket on *:%d %s", port, inf);
fd = xsocket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
@ -88,10 +89,17 @@ int FAST_FUNC udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf)
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) */
/* SO_BINDTODEVICE doesn't work on ethernet aliases (ethN:M) */
colon = strrchr(inf, ':');
if (colon)
*colon = '\0';
if (setsockopt_bindtodevice(fd, inf))
xfunc_die(); /* warning is already printed */
if (colon)
*colon = ':';
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);