xi_sink.c

早期freebsd实现

/*-
 * Copyright (c) 1988, 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988, 1991 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)xi_sink.c	7.6 (Berkeley) 7/15/91";
#endif /* not lint */

/*
 * This is a test program to be a sink for X.25 connections.
 */
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/route.h>
#include <net/if.h>
#include <netccitt/x25.h>

#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>


#define dbprintf if(verbose)printf
#ifdef __STDC__
#define try(a,b,c) {x = (a b); dbprintf("%s%s returns %d\n",c,#a,x);\
		if(x<0) {perror(#a); myexit(0);}}
#else
#define try(a,b,c) {x = (a b); dbprintf("%s%s returns %d\n",c,"a",x);\
		if(x<0) {perror("a"); myexit(0);}}
#endif


struct  ifreq ifr;
short port = 3000;
struct  sockaddr_x25 faddr, laddr = { sizeof(laddr), AF_CCITT };
struct  sockaddr_x25 *sx25 = &laddr;
char **xenvp;

long size, count = 10, forkp, echop = 0, mynamep, verbose = 1, playtag = 0;
long records, intercept = 0, confp;
void savedata();

char buf[2048];
char your_it[] = "You're it!";

char *Servername;

main(argc, argv, envp)
int argc;
char *argv[];
char *envp[];
{
	register char **av = argv;
	register char *cp;

	xenvp = envp;
	while(--argc > 0) {
		av++;
		if (strcmp(*av,"host")==0) {
			av++;
			ccitt_addr(*av, sx25);
			argc--;
		} else if (strcmp(*av,"count")==0) {
			av++;
			sscanf(*av,"%ld",&count);
			argc--;
		} else if (strcmp(*av,"size")==0) {
			av++;
			sscanf(*av,"%ld",&size);
			argc--;
		} else if (strcmp(*av, "intercept")==0) {
			intercept++;
		}
	}
	xisink();
}
#define BIG 2048
#define MIDLIN 512
char readbuf[BIG];
char name[MIDLIN];
struct iovec iov[1];
union {
    struct {
	    struct cmsghdr	cmhdr;
	    char		cmdata[128 - sizeof(struct cmsghdr)];
    } cm;
    char data[128];
} cbuf;
#define control cbuf.data
struct msghdr msghdr = {
	0, 0,
	iov, sizeof(iov)/sizeof(iov[1]),
	0, 0, 0
};

xisink()
{
	int x, s, pid, on = 1, loop = 0, n;
	extern int errno;

	try(socket, (AF_CCITT, SOCK_STREAM, 0),"");

	s = x;

	sx25->x25_opts.op_flags |= X25_MQBIT;
	try(bind, (s, (struct sockaddr *) sx25, sx25->x25_len), "");

	/*try(setsockopt, (s, SOL_SOCKET, SO_DEBUG, &on, sizeof (on)), ""); */

	try(listen, (s, 5), "");
	for(;;) {
		int child, ns;
		int addrlen = sizeof(faddr);
		char childname[50];

		try (accept, (s, (struct sockaddr *)&faddr, &addrlen), "");
		ns = x;
		dumpit("connection from:", &faddr, sizeof faddr);
		if (mynamep || intercept) {
			addrlen = sizeof(faddr);
			try (getsockname, (ns, (struct sockaddr *)&faddr,
				&addrlen), "");
			dumpit("connected as:", &faddr, addrlen);
		}
		loop++;
		if (loop > 3) myexit(0);
		if (forkp) {
			try(fork, (), "");
		} else
			x = 0;
		if (x == 0)  {
		    long n, count = 0, cn, flags;
		    records = 0;
		    for (;;) {
			msghdr.msg_controllen = sizeof(control);
			msghdr.msg_control = control;
			iov->iov_len = sizeof(readbuf);
			iov->iov_base = readbuf;
			n = recvmsg(ns, &msghdr, 0);
			flags = msghdr.msg_flags;
			count++;
			dbprintf("recvmsg from child %d got %d ctl %d flags %x\n",
				    getpid(), n, (cn = msghdr.msg_controllen),
					flags);
			fflush(stdout);
			if (cn && verbose)
				dumpit("control data:\n", control, cn);
			if (n < 0) {
				fprintf(stderr, "errno is %d\n", errno);
				perror("recvmsg");
				/*sleep (10);*/
				break;
			} else {
				if (verbose)
					dumpit("data:\n", readbuf, n);
			}
			if (echop)
				savedata(n);
			if (flags & MSG_EOR)
				records++;
			if (echop && (readbuf[0] & 0x80)) {
				dbprintf("Answering back!!!!\n");
				answerback(ns);
			}
			errno = 0;
		    }
		}
		myexit(0);
	}
}

struct savebuf {
	struct savebuf *s_next;
	struct savebuf *s_prev;
	int	s_n;
	int	s_flags;
} savebuf = {&savebuf, &savebuf};

void
savedata(n)
int n;
{
	register struct savebuf *s = (struct savebuf *)malloc(n + sizeof *s);
	if (s == 0)
		return;
	insque(s, savebuf.s_prev);
	s->s_n = n;
	s->s_flags = msghdr.msg_flags;
	bcopy(readbuf, (char *)(s + 1), n);
}

answerback(ns)
{
	int n;
	register struct savebuf *s = savebuf.s_next, *t;
	msghdr.msg_controllen = 0;
	msghdr.msg_control = 0;
	while (s != &savebuf) {
		iov->iov_len = s->s_n;
		iov->iov_base = (char *)(s + 1);
		n = sendmsg(ns, &msghdr, s->s_flags);
		dbprintf("echoed %d\n", n);
		t = s; s = s->s_next; remque(t); free((char *)t);
	}
}

dumpit(what, where, n)
char *what; unsigned short *where; int n;
{
	unsigned short *s = where;
	unsigned short *z = where + (n+1)/2;
	int count = 0;
	printf(what);
	while(s < z) {
		count++;
		printf("%x ",*s++);
		if ((count & 15) == 0)
			putchar('\n');
	}
	if (count & 15)
		putchar('\n');
	fflush(stdout);
}
myexit(n)
{
	fflush(stderr);
	printf("got %d records\n", records);
	fflush(stdout);
	exit(n);
}