dhcpv4: Move BindToInterface to interfaces package

This moves the implementations of the BindToInterface to the interfaces/
package, since they aren't ipv4-specific.
The BindToInterface function remains in dhcpv4 (simply wraps the one in
interfaces) to keep backwards-compatibility

Additionally, fold bindtodevice_darwin into bindtodevice_bsd: darwin is
mostly a BSD, and happens to support IP_RECVIF, so use that instead of
IP_BOUND_IF, which only affects sends, not receives according to the
code comments in bsd/netinet/ip_output.c as well as being v4-only

Signed-off-by: Anatole Denis <natolumin@unverle.fr>

1 files changed, 10 insertions, 0 deletions

diff --git a/dhcpv4/bindtointerface.go b/dhcpv4/bindtointerface.go
new file mode 100644
index 0000000..dbe8fbc
--- /dev/null
+++ b/dhcpv4/bindtointerface.go
@@ -0,0 +1,10 @@
+package dhcpv4
+
+import (
+	"github.com/insomniacslk/dhcp/interfaces"
+)
+
+// BindToInterface (deprecated) redirects to interfaces.BindToInterface
+func BindToInterface(fd int, ifname string) error {
+	return interfaces.BindToInterface(fd, ifname)
+}