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- /* linux.c: low level access routines for Linux
- * Copyright 2007, Coraid, Inc., and licensed under GPL v.2.
- */
- #include "config.h"
- #include <sys/socket.h>
- #include <stdio.h>
- #include <string.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <sys/time.h>
- #include <features.h> /* for the glibc version number */
- #if __GLIBC__ >= 2 && __GLIBC_MINOR >= 1
- #include <netpacket/packet.h>
- #include <net/ethernet.h> /* the L2 protocols */
- #else
- #include <asm/types.h>
- #include <linux/if_packet.h>
- #include <linux/if_ether.h> /* The L2 protocols */
- #endif
- #include <sys/ioctl.h>
- #include <sys/types.h>
- #include <net/if.h>
- #include <netinet/in.h>
- #include <linux/fs.h>
- #include <sys/stat.h>
- #include "dat.h"
- #include "fns.h"
- static int
- getindx(int s, char *name) // return the index of device 'name'
- {
- struct ifreq xx;
- int n;
- strcpy(xx.ifr_name, name);
- n = ioctl(s, SIOCGIFINDEX, &xx);
- if (n == -1)
- return -1;
- return xx.ifr_ifindex;
- }
- int
- dial(char *eth) // get us a raw connection to an interface
- {
- int i;
- int n, s;
- struct sockaddr_ll sa;
- enum { aoe_type = 0x88a2 };
- memset(&sa, 0, sizeof sa);
- s = socket(PF_PACKET, SOCK_RAW, htons(aoe_type));
- if (s == -1) {
- perror("got bad socket");
- return -1;
- }
- i = getindx(s, eth);
- sa.sll_family = AF_PACKET;
- sa.sll_protocol = htons(0x88a2);
- sa.sll_ifindex = i;
- n = bind(s, (struct sockaddr *)&sa, sizeof sa);
- if (n == -1) {
- perror("bind funky");
- return -1;
- }
- return s;
- }
- int
- getea(int s, char *name, uchar *ea)
- {
- struct ifreq xx;
- int n;
- strcpy(xx.ifr_name, name);
- n = ioctl(s, SIOCGIFHWADDR, &xx);
- if (n == -1) {
- perror("Can't get hw addr");
- return 0;
- }
- memmove(ea, xx.ifr_hwaddr.sa_data, 6);
- return 1;
- }
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