contrib/ipfilter/ipsend/sirix.c

   1 /*
   2  * (C)opyright 1992-1998 Darren Reed.
   3  * (C)opyright 1997 Marc Boucher.
   4  *
   5  * See the IPFILTER.LICENCE file for details on licencing.
   6  */
   7 #if defined(__sgi) && (IRIX > 602)
   8 # include <sys/ptimers.h>
   9 #endif
  10 #include <stdio.h>
  11 #include <sys/types.h>
  12 #include <string.h>
  13 #include <unistd.h>
  14 #include <stdlib.h>
  15 #include <errno.h>
  16 #include <sys/socket.h>
  17 #include <sys/ioctl.h>
  18
  19 #include <net/if.h>
  20 #include <net/raw.h>
  21 #include <netinet/in.h>
  22 #include <netinet/in_systm.h>
  23 #include <netinet/ip.h>
  24 #include <netinet/if_ether.h>
  25 #include <netinet/ip_var.h>
  26 #include <netinet/udp.h>
  27 #include <netinet/udp_var.h>
  28 #include <netinet/tcp.h>
  29 #include "ipsend.h"
  30
  31 #if !defined(lint) && defined(LIBC_SCCS)
  32 static  char    sirix[] = "@(#)sirix.c  1.0 10/9/97 (C)1997 Marc Boucher";
  33 #endif
  34
  35
  36 int     initdevice(char *device, int sport, int tout)
  37 {
  38         int fd;
  39         struct sockaddr_raw sr;
  40
  41         if ((fd = socket(PF_RAW, SOCK_RAW, RAWPROTO_DRAIN)) < 0)
  42             {
  43                 perror("socket(PF_RAW, SOCK_RAW, RAWPROTO_DRAIN)");
  44                 return -1;
  45             }
  46
  47         memset(&sr, 0, sizeof(sr));
  48         sr.sr_family = AF_RAW;
  49         sr.sr_port = ETHERTYPE_IP;
  50         strncpy(sr.sr_ifname, device, sizeof(sr.sr_ifname));
  51         if (bind(fd, &sr, sizeof(sr)) < 0)
  52             {
  53                 perror("bind AF_RAW");
  54                 close(fd);
  55                 return -1;
  56             }
  57         return fd;
  58 }
  59
  60
  61 /*
  62  * output an IP packet
  63  */
  64 int     sendip(int fd, char *pkt, int len)
  65 {
  66         struct sockaddr_raw sr;
  67         int srlen = sizeof(sr);
  68         struct ifreq ifr;
  69         struct ether_header *eh = (struct ether_header *)pkt;
  70
  71         if (getsockname(fd, &sr, &srlen) == -1)
  72             {
  73                 perror("getsockname");
  74                 return -1;
  75             }
  76
  77         memset(&ifr, 0, sizeof(ifr));
  78         strncpy(ifr.ifr_name, sr.sr_ifname, sizeof ifr.ifr_name);
  79
  80         if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
  81             {
  82                 perror("ioctl SIOCGIFADDR");
  83                 return -1;
  84             }
  85
  86         memcpy(eh->ether_shost, ifr.ifr_addr.sa_data, sizeof(eh->ether_shost));
  87
  88         if (write(fd, pkt, len) == -1)
  89             {
  90                 perror("send");
  91                 return -1;
  92             }
  93
  94         return len;
  95 }