After reading ifconfig source code for hours, I end with this, witch was
suppose to change mac address via a command line:
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/mac.h> #include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h> /* IP */
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h> #include <ifaddrs.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> struct afswtch { const char *af_name; /* as given on
cmd line, e.g. "inet" */ short af_af; /* AF_* */ /* * Status
is handled one of two ways; if there is an * address associated with the
interface then the * associated address family af_status method is invoked *
with the appropriate addressin info. Otherwise, if * all possible info is to
be displayed and af_other_status * is defined then it is invoked after all
address status * is presented. */ void (*af_status)(int, const
struct ifaddrs *); void (*af_other_status)(int); /* parse address
method */ void (*af_getaddr)(const char *, int); /* parse prefix
method (IPv6) */ void (*af_getprefix)(const char *, int); void
(*af_postproc)(int s, const struct afswtch *); u_long
af_difaddr; /* set dst if address ioctl */ u_long af_aifaddr;
/* set if address ioctl */ void *af_ridreq; /* */ void
*af_addreq; /* */ struct afswtch *af_next; /* XXX doesn't fit model */
void
(*af_status_tunnel)(int); void (*af_settunnel)(int s, struct
addrinfo *srcres, struct addrinfo *dstres);
}; int
main(int argc, char **argv)
{ int s, error; struct ifreq ifr; //char name[IFNAMSIZ]; mac_t
label; if (mac_from_text(&label, argv[1]) == -1) { perror(argv[1]); return; }
ifr.ifr_addr.sa_family = AF_INET; if ((s = socket(ifr.ifr_addr.sa_family,
SOCK_DGRAM, 0)) < 0) err(1, "socket(family %u,SOCK_DGRAM",
ifr.ifr_addr.sa_family); memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name,
argv[2], sizeof(ifr.ifr_name)); ifr.ifr_ifru.ifru_data = (void *)label; error =
ioctl(s, SIOCSIFMAC, &ifr); mac_free(label); if (error == -1)
perror("setifmac"); return 0;
}
Now, if I try to change mac address of my card, I get this message:
./mactool dc0 00:10:22:33:44:77
mactool: socket(family 18,SOCK_DGRAM: Protocol not supported
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