net: remove doarp flag from netdev

kernel-src/include/kernel/net.h

@@ -29,7 +29,6 @@ typedef struct netdev_t {
 	size_t mtu;
 	uint32_t ip;
 	hashtable_t arpcache;
-	bool doarp;
 	int (*allocdesc)(size_t requestedsize, netdesc_t *desc);
 	int (*sendpacket)(struct netdev_t *_internal, netdesc_t desc, mac_t targetmac, int proto);
 } netdev_t;

kernel-src/io/net/ipv4.c

@@ -168,11 +168,9 @@ int ipv4_sendpacket(void *buffer, size_t packetsize, uint32_t ip, int proto, net
 		if (entry.netdev == NULL)
 			return 0; // if a packet can't be routed to anywhere just pretend it was sent somewhere
 
-		if (entry.netdev->doarp) {
-			int error = arp_lookup(entry.netdev, entry.gateway ? entry.gateway : ip, &mac);
-			if (error)
-				return error;
-		}
+		int error = arp_lookup(entry.netdev, entry.gateway ? entry.gateway : ip, &mac);
+		if (error)
+			return error;
 
 		netdev = entry.netdev;
 	} else {

kernel-src/io/net/loopback.c

@@ -51,7 +51,6 @@ void loopback_init() {
 	loopbacknetdev.sendpacket = loopback_sendpacket;
 	loopbacknetdev.allocdesc = loopback_allocdesc;
 	loopbacknetdev.ip = 0x7f000001;
-	loopbacknetdev.doarp = false;
 	__assert(hashtable_init(&loopbacknetdev.arpcache, 30) == 0);
 
 	for (int i = 0; i < 6; ++i)

kernel-src/io/net/vionet.c

@@ -179,7 +179,6 @@ int vionet_newdevice(viodevice_t *viodevice) {
 	netdev->netdev.mtu = 1500;
 	netdev->netdev.sendpacket = vionet_sendpacket;
 	netdev->netdev.allocdesc = vionet_allocdesc;
-	netdev->netdev.doarp = true;
 	__assert(hashtable_init(&netdev->netdev.arpcache, 30) == 0);
 
 	// initialize queues