/* * eth-linux.c * * Copyright (c) 2000 Dug Song <dugsong@monkey.org> * * $Id: eth-linux.c,v 1.8 2005/01/25 21:30:40 dugsong Exp $ */#include "config.h"#include <sys/types.h>#include <sys/ioctl.h>#include <sys/socket.h>#include <net/if.h>#include <features.h>#if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1#include <netpacket/packet.h>#include <net/ethernet.h>#else#include <asm/types.h>#include <linux/if_packet.h>#include <linux/if_ether.h>#endif /* __GLIBC__ */#include <netinet/in.h>#include <assert.h>#include <errno.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include "dnet.h"struct eth_handle {	int			fd;	struct ifreq		ifr;	struct sockaddr_ll	sll;};eth_t *eth_open(const char *device){	eth_t *e;	int n;		if ((e = calloc(1, sizeof(*e))) != NULL) {		if ((e->fd = socket(PF_PACKET, SOCK_RAW,			 htons(ETH_P_ALL))) < 0)			return (eth_close(e));#ifdef SO_BROADCAST		n = 1;		if (setsockopt(e->fd, SOL_SOCKET, SO_BROADCAST, &n,			sizeof(n)) < 0)			return (eth_close(e));#endif		strlcpy(e->ifr.ifr_name, device, sizeof(e->ifr.ifr_name));				if (ioctl(e->fd, SIOCGIFINDEX, &e->ifr) < 0)			return (eth_close(e));				e->sll.sll_family = AF_PACKET;		e->sll.sll_ifindex = e->ifr.ifr_ifindex;	}	return (e);}ssize_teth_send(eth_t *e, const void *buf, size_t len){	struct eth_hdr *eth = (struct eth_hdr *)buf;		e->sll.sll_protocol = eth->eth_type;	return (sendto(e->fd, buf, len, 0, (struct sockaddr *)&e->sll,	    sizeof(e->sll)));}eth_t *eth_close(eth_t *e){	if (e != NULL) {		if (e->fd >= 0)			close(e->fd);		free(e);	}	return (NULL);}inteth_get(eth_t *e, eth_addr_t *ea){	struct addr ha;		if (ioctl(e->fd, SIOCGIFHWADDR, &e->ifr) < 0)		return (-1);		if (addr_ston(&e->ifr.ifr_hwaddr, &ha) < 0)		return (-1);	memcpy(ea, &ha.addr_eth, sizeof(*ea));	return (0);}inteth_set(eth_t *e, const eth_addr_t *ea){	struct addr ha;	ha.addr_type = ADDR_TYPE_ETH;	ha.addr_bits = ETH_ADDR_BITS;	memcpy(&ha.addr_eth, ea, ETH_ADDR_LEN);	addr_ntos(&ha, &e->ifr.ifr_hwaddr);	return (ioctl(e->fd, SIOCSIFHWADDR, &e->ifr));}