41edb306f0
Through fixes and improvements our ipfilter sources have diverged enough to warrant move from contrib into sbin/ipf. Now that I'm planning on implementing MSS clamping as in iptables it makes more sense to move ipfilter to sbin. This is the second of three commits of the ipfilter move. Suggested by glebius on two occaions. Suggested by and discussed with: glebius Reviewed by: glebius, kp (for #network) MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D33510
90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
/* $FreeBSD$ */
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/*
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* (C)opyright 2000 Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* WARNING: Attempting to use this .c file on HP-UX 11.00 will cause the
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* system to crash.
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "ipsend.h"
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#if !defined(lint) && defined(LIBC_SCCS)
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static char sirix[] = "@(#)sirix.c 1.0 10/9/97 (C)1997 Marc Boucher";
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#endif
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int initdevice(char *device, int tout)
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{
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struct sockaddr s;
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struct ifreq ifr;
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int fd;
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memset(&ifr, 0, sizeof(ifr));
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strncpy(ifr.ifr_name, device, sizeof ifr.ifr_name);
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if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
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{
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perror("socket(AF_INET, SOCK_RAW, IPPROTO_RAW)");
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return -1;
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}
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if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
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{
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perror("ioctl SIOCGIFADDR");
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return -1;
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}
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bzero((char *)&s, sizeof(s));
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s.sa_family = AF_INET;
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bcopy(&ifr.ifr_addr, s.sa_data, 4);
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if (bind(fd, &s, sizeof(s)) == -1)
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perror("bind");
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return fd;
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}
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/*
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* output an IP packet
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*/
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int sendip(int fd, char *pkt, int len)
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{
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struct ether_header *eh;
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struct sockaddr_in sin;
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eh = (struct ether_header *)pkt;
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bzero((char *)&sin, sizeof(sin));
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sin.sin_family = AF_INET;
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pkt += 14;
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len -= 14;
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bcopy(pkt + 12, (char *)&sin.sin_addr, 4);
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if (sendto(fd, pkt, len, 0, &sin, sizeof(sin)) == -1)
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{
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perror("send");
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return -1;
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}
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return len;
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}
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