Andy Hilker wrote:
Hi,
i try porting a little utility from linux to freebsd.
Maybe someone could give me a hint, what i am doing wrong.
-- snip --
/* Note: not portable */
// if ((s = socket(AF_INET, SOCK_PACKET, SOCK_PACKET)) < 0) {
// ??? ported
if ((s = socket(AF_INET,SOCK_RAW,IPPROTO_RAW)) < 0) {
if (errno == EPERM)
fprintf(stderr, "programm must run as root\n");
else
perror("programm: socket");
if (! debug)
return 2;
}
/* Fill in the source address, if possible.
The code to retrieve the local station address is Linux specific. */
/* Note: not portable */
/*
if (! opt_no_src_addr){
struct ifreq if_hwaddr;
unsigned char *hwaddr = ifr_addr.sa_data;
strcpy(if_hwaddr.ifr_name, ifname);
if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) < 0) {
fprintf(stderr, "SIOCGIFHWADDR on %s failed: %s\n", ifname,
strerror(errno));
return 1;
}
memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
if (verbose) {
printf("The hardware address (SIOCGIFHWADDR) of %s is type %d "
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n", ifname,
if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
}
}
*/
// ??? ported, xx:xx:xx:xx:xx:xx = MAC Adress of sender
memcpy(outpack+6, "xx:xx:xx:xx:xx:xx", 6);
/* Note: not portable */
/*
whereto.sa_family = 0;
strcpy(whereto.sa_data, ifname);
if ((i = sendto(s, outpack, pktsize, 0, &whereto, sizeof(whereto))) < 0)
perror("sendto");
else if (debug)
printf("sendto returned %d.\n", i);
*/
// ??? ported, fxp0 = sending interface
whereto.sa_family = 0;
strcpy(whereto.sa_data, "fxp0");
if ((i = sendto(s, outpack, pktsize, 0, &whereto, sizeof(whereto))) < 0)
perror("sendto");
else if (debug)
printf("sendto returned %d.\n", i);
-- snip --
bye,
Andy
I wrote a paper on FreeBSD raw sockets a while ago. You can find it here:
http://www.reversedhell.net/rawsockets/raw_tcp.tgz
or here:
http://packetstormsecurity.org/programming-tutorials/raw_tcp.tgz
Cheers/bye,
Alin.
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