socket: SIOCGIFINDEX

kernel-src/include/kernel/abi.h

@@ -184,6 +184,7 @@ typedef struct {
 #define SIOCSIFADDR	0x8916
 #define SIOCGIFMTU 0x8921
 #define SIOCGIFHWADDR 0x8927
+#define SIOCGIFINDEX 0x8933
 #define SIOCADDRT 0x890b
 #define FIONREAD 0x541B
 #define FIONBIO 0x5421
@@ -193,6 +194,7 @@ typedef struct {
 	union {
 		abisockaddr_t addr;
 		int mtu;
+		int ifindex;
 		short flags;
 	};
 } ifreq_t;

kernel-src/include/kernel/net.h

@@ -37,6 +37,7 @@ typedef struct {
 
 typedef struct netdev_t {
 	mac_t mac;
+	int ifindex;
 	size_t mtu;
 	uint32_t ip;
 	int ipcurrid; // XXX This is defined as something per peer. However, having only one of these *should* work for most cases