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Date: Wed, 10 Dec 2003 13:32:51 +0100
From: Andy Hilker <ah@cryptobank.de>
To: freebsd-hackers@FreeBSD.ORG
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Organization: cryptobank - Andy Hilker
Subject: porting linux SOCK_RAW to freebsd
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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