diff options
Diffstat (limited to 'libbb/xconnect.c')
| -rw-r--r-- | libbb/xconnect.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libbb/xconnect.c b/libbb/xconnect.c index d48c50339..27c7424b6 100644 --- a/libbb/xconnect.c +++ b/libbb/xconnect.c @@ -7,6 +7,7 @@ */ #include <netinet/in.h> +#include <net/if.h> #include "libbb.h" void FAST_FUNC setsockopt_reuseaddr(int fd) @@ -17,6 +18,20 @@ int FAST_FUNC setsockopt_broadcast(int fd) { return setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &const_int_1, sizeof(const_int_1)); } +int FAST_FUNC setsockopt_bindtodevice(int fd, const char *iface) +{ + int r; + struct ifreq ifr; + strncpy(ifr.ifr_name, iface, IFNAMSIZ); + /* Actually, ifr_name is at offset 0, and in practice + * just giving char[IFNAMSIZ] instead of struct ifreq works too. + * But just in case it's not true on some obscure arch... */ + r = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)); + if (r) + bb_perror_msg("can't bind to interface %s", iface); + return r; +} + void FAST_FUNC xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) { |