eth: process function

kernel-src/io/net/eth.c

@@ -0,0 +1,29 @@
+#include <kernel/net.h>
+#include <kernel/eth.h>
+#include <logging.h>
+
+// runs on dpc context, called by the individual driver dpcs on a receive.
+void eth_process(netdev_t *netdev, void *buffer) {
+	ethframe_t *frame = buffer;
+
+	mac_t dst, src;
+	memcpy(&dst, &frame->destination, sizeof(mac_t));
+	memcpy(&src, &frame->source, sizeof(mac_t));
+
+	mac_t broadcast = NET_BROADCAST_MAC;
+	// check if packet is for our machine or a broadcast. if neither, do nothing
+	if (!(MAC_EQUAL(&dst, &netdev->mac) || MAC_EQUAL(&dst, &broadcast)))
+		return;
+
+	printf("our machine!\n");
+
+	void *nextbuff = (void *)((uintptr_t)buffer + sizeof(ethframe_t));
+
+	switch (be_to_cpu_w(frame->type)) {
+		case ETH_PROTO_IP:
+			break;
+		case ETH_PROTO_ARP:
+			arp_process(netdev, nextbuff);
+			break;
+	}
+}

kernel-src/io/net/ipv4.c

@@ -1,4 +1,5 @@
 #include <kernel/net.h>
+#include <kernel/eth.h>
 #include <arch/cpu.h>
 #include <logging.h>