dist/ipf/ipsend/slinux.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * (C)opyright 1992-1998 Darren Reed. (from tcplog)
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <netdb.h>
  13 #include <ctype.h>
  14 #include <signal.h>
  15 #include <errno.h>
  16 #include <sys/types.h>
  17 #include <sys/time.h>
  18 #include <sys/timeb.h>
  19 #include <sys/socket.h>
  20 #include <sys/file.h>
  21 #include <sys/ioctl.h>
  22 #include <sys/dir.h>
  23 #include <linux/netdevice.h>
  24 #include <net/if.h>
  25 #include <netinet/in.h>
  26 #include <netinet/in_systm.h>
  27 #include <netinet/ip.h>
  28 #include <netinet/tcp.h>
  29 #include "ipsend.h"
  30
  31 #if !defined(lint)
  32 static const char sccsid[] = "@(#)slinux.c      1.2 8/25/95";
  33 static const char rcsid[] = "@(#)Id: slinux.c,v 2.3 2001/06/09 17:09:26 darrenr Exp";
  34 #endif
  35
  36 #define CHUNKSIZE       8192
  37 #define BUFSPACE        (4*CHUNKSIZE)
  38
  39 /*
  40  * Be careful to only include those defined in the flags option for the
  41  * interface are included in the header size.
  42  */
  43
  44 static  int     timeout;
  45 static  char    *eth_dev = NULL;
  46
  47
  48 int     initdevice(dev, spare)
  49 char    *dev;
  50 int     spare;
  51 {
  52         int fd;
  53
  54         eth_dev = strdup(dev);
  55         if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
  56             {
  57                 perror("socket(SOCK_PACKET)");
  58                 exit(-1);
  59             }
  60
  61         return fd;
  62 }
  63
  64
  65 /*
  66  * output an IP packet onto a fd opened for /dev/nit
  67  */
  68 int     sendip(fd, pkt, len)
  69 int     fd, len;
  70 char    *pkt;
  71 {
  72         struct  sockaddr        s;
  73         struct  ifreq   ifr;
  74
  75         strncpy(ifr.ifr_name, eth_dev, sizeof(ifr.ifr_name));
  76         if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1)
  77             {
  78                 perror("SIOCGIFHWADDR");
  79                 return -1;
  80             }
  81         bcopy(ifr.ifr_hwaddr.sa_data, pkt + 6, 6);
  82         s.sa_family = ETHERTYPE_IP;
  83         strncpy(s.sa_data, eth_dev, sizeof(s.sa_data));
  84
  85         if (sendto(fd, pkt, len, 0, &s, sizeof(s)) == -1)
  86             {
  87                 perror("send");
  88                 return -1;
  89             }
  90
  91         return len;
  92 }