161 lines
3.1 KiB
C
161 lines
3.1 KiB
C
/* $NetBSD: snit.c,v 1.3 2004/03/28 09:00:56 martti Exp $ */
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/*
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* (C)opyright 1992-1998 Darren Reed. (from tcplog)
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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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*/
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#include <stdio.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/timeb.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <net/nit.h>
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#include <sys/fcntlcom.h>
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#include <sys/dir.h>
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#include <net/nit_if.h>
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#include <net/nit_pf.h>
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#include <net/nit_buf.h>
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#include <net/packetfilt.h>
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#include <sys/stropts.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 "ipsend.h"
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#if !defined(lint)
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static const char sccsid[] = "@(#)snit.c 1.5 1/11/96 (C)1995 Darren Reed";
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static const char rcsid[] = "@(#)Id: snit.c,v 2.3 2001/06/09 17:09:26 darrenr Exp";
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#endif
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#define CHUNKSIZE 8192
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#define BUFSPACE (4*CHUNKSIZE)
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/*
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* Be careful to only include those defined in the flags option for the
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* interface are included in the header size.
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*/
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#define BUFHDR_SIZE (sizeof(struct nit_bufhdr))
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#define NIT_HDRSIZE (BUFHDR_SIZE)
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static int timeout;
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int initdevice(device, tout)
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char *device;
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int tout;
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{
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struct strioctl si;
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struct timeval to;
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struct ifreq ifr;
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int fd;
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if ((fd = open("/dev/nit", O_RDWR)) < 0)
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{
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perror("/dev/nit");
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exit(-1);
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}
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/*
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* arrange to get messages from the NIT STREAM and use NIT_BUF option
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*/
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ioctl(fd, I_SRDOPT, (char*)RMSGD);
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ioctl(fd, I_PUSH, "nbuf");
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/*
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* set the timeout
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*/
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timeout = tout;
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si.ic_timout = 1;
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to.tv_sec = 1;
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to.tv_usec = 0;
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si.ic_cmd = NIOCSTIME;
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si.ic_len = sizeof(to);
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si.ic_dp = (char*)&to;
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if (ioctl(fd, I_STR, (char*)&si) == -1)
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{
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perror("ioctl: NIT timeout");
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exit(-1);
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}
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/*
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* request the interface
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*/
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strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
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ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' ';
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si.ic_cmd = NIOCBIND;
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si.ic_len = sizeof(ifr);
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si.ic_dp = (char*)𝔦
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if (ioctl(fd, I_STR, (char*)&si) == -1)
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{
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perror(ifr.ifr_name);
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exit(1);
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}
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return fd;
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}
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/*
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* output an IP packet onto a fd opened for /dev/nit
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*/
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int sendip(fd, pkt, len)
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int fd, len;
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char *pkt;
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{
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struct sockaddr sk, *sa = &sk;
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struct strbuf cbuf, *cp = &cbuf, dbuf, *dp = &dbuf;
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/*
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* For ethernet, need at least 802.3 header and IP header.
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*/
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if (len < (sizeof(sa->sa_data) + sizeof(struct ip)))
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return -1;
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/*
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* to avoid any output processing for IP, say we're not.
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*/
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sa->sa_family = AF_UNSPEC;
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bcopy(pkt, sa->sa_data, sizeof(sa->sa_data));
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pkt += sizeof(sa->sa_data);
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len -= sizeof(sa->sa_data);
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/*
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* construct NIT STREAMS messages, first control then data.
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*/
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cp->len = sizeof(*sa);
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cp->maxlen = sizeof(*sa);
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cp->buf = (char *)sa;
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dp->buf = pkt;
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dp->len = len;
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dp->maxlen = dp->len;
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if (putmsg(fd, cp, dp, 0) == -1)
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{
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perror("putmsg");
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return -1;
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}
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if (ioctl(fd, I_FLUSH, FLUSHW) == -1)
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{
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perror("I_FLUSH");
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return -1;
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}
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return len;
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}
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