vionet: initial tx only implementation

kernel-src/include/kernel/eth.h

@@ -0,0 +1,15 @@
+#ifndef _ETH_H
+#define _ETH_H
+
+#include <stdint.h>
+
+typedef struct {
+	uint8_t destination[6];
+	uint8_t source[6];
+	uint16_t type;
+} __attribute__((packed)) ethframe_t;
+
+#define ETH_PROTO_IP 0x0800
+#define ETH_PROTO_ARP 0x0806
+
+#endif

kernel-src/include/kernel/net.h

@@ -0,0 +1,67 @@
+#ifndef _NET_H
+#define _NET_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <kernel/eth.h>
+
+typedef struct {
+	void *address;
+	uintmax_t curroffset;
+	size_t size;
+} netdesc_t;
+
+typedef struct {
+	uint8_t address[6];
+} __attribute__((packed)) mac_t;
+
+typedef struct netdev_t {
+	mac_t mac;
+	size_t mtu;
+	int (*allocdesc)(size_t requestedsize, netdesc_t *desc);
+	int (*sendpacket)(struct netdev_t *_internal, netdesc_t desc, mac_t targetmac, int proto);
+} netdev_t;
+
+typedef struct {
+	uint16_t hwtype;
+	uint16_t protocoltype;
+	uint8_t hwlen;
+	uint8_t ptlen;
+	uint16_t opcode;
+	uint8_t srchw[6];
+	uint8_t srcpt[4];
+	uint8_t dsthw[6];
+	uint8_t dstpt[4];
+} __attribute__((packed)) arpframe_t;
+
+typedef struct {
+	uint8_t version_length;
+	uint8_t servicetype_ecn;
+	uint16_t packetlen;
+	uint16_t id;
+	uint16_t flags_fragoffset;
+	uint8_t timetolive;
+	uint8_t protocol;
+	uint16_t framechecksum;
+	uint32_t srcaddr;
+	uint32_t dstaddr;
+} __attribute__((packed)) ipv4frame_t;
+
+typedef struct {
+	uint16_t srcport;
+	uint16_t dstport;
+	uint16_t length;
+	uint16_t checksum;
+} __attribute__((packed)) udpframe_t;
+
+#define NET_BROADCAST_MAC (mac_t){.address = {0xff,0xff,0xff,0xff,0xff,0xff}}
+
+#define IPV4_PROTO_UDP 0x11
+
+int udp_allocdesc(netdev_t *netdev, size_t requestedsize, netdesc_t *desc);
+int udp_sendpacket(netdev_t *netdev, netdesc_t desc, uint32_t ip, uint16_t srcport, uint16_t dstport);
+int ipv4_allocdesc(netdev_t *netdev, size_t requestedsize, netdesc_t *desc);
+int ipv4_sendpacket(netdev_t *netdev, netdesc_t desc, uint32_t ip, int proto);
+
+#endif