dist/ipf/ipsend/sockraw.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * (C)opyright 2000 Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * WARNING: Attempting to use this .c file on HP-UX 11.00 will cause the
   9  *          system to crash.
  10  */
  11 #include <sys/param.h>
  12 #include <sys/types.h>
  13 #include <sys/socket.h>
  14 #include <sys/ioctl.h>
  15
  16 #include <net/if.h>
  17 #include <netinet/in.h>
  18 #include <netinet/in_systm.h>
  19 #include <netinet/ip.h>
  20 #include <netinet/if_ether.h>
  21 #include <netinet/ip_var.h>
  22 #include <netinet/udp.h>
  23 #include <netinet/udp_var.h>
  24 #include <netinet/tcp.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <errno.h>
  30 #include "ipsend.h"
  31
  32 #if !defined(lint) && defined(LIBC_SCCS)
  33 static  char    sirix[] = "@(#)sirix.c  1.0 10/9/97 (C)1997 Marc Boucher";
  34 #endif
  35
  36
  37 int     initdevice(char *device, int tout)
  38 {
  39         struct sockaddr s;
  40         struct ifreq ifr;
  41         int fd;
  42
  43         memset(&ifr, 0, sizeof(ifr));
  44         strncpy(ifr.ifr_name, device, sizeof ifr.ifr_name);
  45
  46         if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
  47             {
  48                 perror("socket(AF_INET, SOCK_RAW, IPPROTO_RAW)");
  49                 return -1;
  50             }
  51
  52         if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
  53             {
  54                 perror("ioctl SIOCGIFADDR");
  55                 return -1;
  56             }
  57
  58         bzero((char *)&s, sizeof(s));
  59         s.sa_family = AF_INET;
  60         bcopy(&ifr.ifr_addr, s.sa_data, 4);
  61         if (bind(fd, &s, sizeof(s)) == -1)
  62                 perror("bind");
  63         return fd;
  64 }
  65
  66
  67 /*
  68  * output an IP packet
  69  */
  70 int     sendip(int fd, char *pkt, int len)
  71 {
  72         struct ether_header *eh;
  73         struct sockaddr_in sin;
  74
  75         eh = (struct ether_header *)pkt;
  76         bzero((char *)&sin, sizeof(sin));
  77         sin.sin_family = AF_INET;
  78         pkt += 14;
  79         len -= 14;
  80         bcopy(pkt + 12, (char *)&sin.sin_addr, 4);
  81
  82         if (sendto(fd, pkt, len, 0, &sin, sizeof(sin)) == -1)
  83             {
  84                 perror("send");
  85                 return -1;
  86             }
  87
  88         return len;
  89 }