1 /* $NetBSD: slinux.c,v 1.2 2012/07/22 14:27:36 darrenr Exp $ */ 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 1.1.1.2 2012/07/22 13:44:37 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 } 93