[BUG] interface binding: length must include the trailing zero
The interface length passed to the setsockopt(SO_BINDTODEVICE) must
include the trailing \0. Otherwise it will randomly fail.
diff --git a/src/backend.c b/src/backend.c
index d386805..f511b77 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -1723,7 +1723,7 @@
#ifdef SO_BINDTODEVICE
/* Note: this might fail if not CAP_NET_RAW */
if (s->srv->iface_name)
- setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, s->srv->iface_name, s->srv->iface_len);
+ setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, s->srv->iface_name, s->srv->iface_len + 1);
#endif
ret = tcpv4_bind_socket(fd, flags, &s->srv->source_addr, remote);
if (ret) {
@@ -1767,7 +1767,7 @@
#ifdef SO_BINDTODEVICE
/* Note: this might fail if not CAP_NET_RAW */
if (s->be->iface_name)
- setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, s->be->iface_name, s->be->iface_len);
+ setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, s->be->iface_name, s->be->iface_len + 1);
#endif
ret = tcpv4_bind_socket(fd, flags, &s->be->source_addr, remote);
if (ret) {