bridge.c

eCos操作系统源码

//==========================================================================
//
//      tests/bridge.c
//
//     
//
//==========================================================================
//####BSDCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from OpenBSD or other sources,
// and are covered by the appropriate copyright disclaimers included herein.
//
// -------------------------------------------
//
//####BSDCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    Jason L. Wright ([e-mail])
// Contributors: [e-mail] (Andrew Lunn), hmt
// Date:         2000-01-10
// Purpose:      
// Description:  
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================


/*	$OpenBSD: brconfig.c,v 1.6 2000/02/04 06:32:04 deraadt Exp $	*/

/*
 * Copyright (c) 1999, 2000 Jason L. Wright ([e-mail])
 * 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 Jason L. Wright
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <stdio.h>
#include <network.h>
#include <sys/types.h>
#include <stdlib.h>

#ifdef CYGPKG_NET_BRIDGE_HANDLER
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net/if_bridge.h>
#include <sys/errno.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <assert.h>
#include <ctype.h>

void bridge_usage __P((void));
int main __P((int, char **));
int bridge_setflag __P((int, char *, short));
int bridge_clrflag __P((int, char *, short));
int bridge_ifsetflag __P((int, char *, char *, u_int32_t));
int bridge_ifclrflag __P((int, char *, char *, u_int32_t));
int bridge_list __P((int, char *, char *));
int bridge_addrs __P((int, char *, char *));
int bridge_addaddr __P((int, char *, char *, char *));
int bridge_deladdr __P((int, char *, char *));
int bridge_maxaddr __P((int, char *, char *));
int bridge_timeout __P((int, char *, char *));
int bridge_flush __P((int, char *));
int bridge_flushall __P((int, char *));
int bridge_add __P((int, char *, char *));
int bridge_delete __P((int, char *, char *));
int bridge_status __P((int, char *));
int is_bridge __P((int, char *));
int bridge_show_all __P((int));
void printb __P((char *, unsigned short, char *));
int bridge_rule __P((int, char *, int, char **, int));
int bridge_rules __P((int, char *, char *, char *));
int bridge_flush_rule __P((int, char *, char *));
void bridge_badrule __P((int, char **, int));
void bridge_showrule __P((struct ifbrlreq *, char *));
int bridge_rulefile __P((int, char *, char *));

/* if_flags bits: borrowed from ifconfig.c */
#define	IFFBITS \
"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\
\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST"

#define	IFBAFBITS	"\020\1STATIC"
#define	IFBIFBITS	"\020\1LEARNING\2DISCOVER\3BLOCKNONIP\4BLOCKARP"

#define warnx(x) diag_printf(x);
#define warnx2(x,y) diag_printf(x,y) 
#define warnx3(x,y,z) diag_printf(x,y,z) 
#define err(x,y) assert(0);
extern  int cyg_kmem_print_stats(void);

static char * _ether_aton __P((char *, struct ether_addr *));

char *
ether_ntoa(e)
	struct ether_addr *e;
{
	static char a[] = "xx:xx:xx:xx:xx:xx";

	if (e->ether_addr_octet[0] > 0xFF || e->ether_addr_octet[1] > 0xFF ||
	    e->ether_addr_octet[2] > 0xFF || e->ether_addr_octet[3] > 0xFF ||
	    e->ether_addr_octet[4] > 0xFF || e->ether_addr_octet[5] > 0xFF) {
		errno = EINVAL;
		return (NULL);
	}

	(void)sprintf(a, "%02x:%02x:%02x:%02x:%02x:%02x",
	    e->ether_addr_octet[0], e->ether_addr_octet[1],
	    e->ether_addr_octet[2], e->ether_addr_octet[3],
	    e->ether_addr_octet[4], e->ether_addr_octet[5]);

	return (a);
}

static char *
_ether_aton(s, e)
	char *s;
	struct ether_addr *e;
{
	int i;
	long l;
	char *pp;

	while (isspace(*s))
		s++;

	/* expect 6 hex octets separated by ':' or space/NUL if last octet */
	for (i = 0; i < 6; i++) {
		l = strtol(s, &pp, 16);
		if (pp == s || l > 0xFF || l < 0)
			return (NULL);
		if (!(*pp == ':' || (i == 5 && (isspace(*pp) || *pp == '\0'))))
			return (NULL);
		e->ether_addr_octet[i] = (u_char)l;
		s = pp + 1;
	}

	/* return character after the octets ala strtol(3) */
	return (pp);
}

struct ether_addr *
ether_aton(s)
	char *s;
{
	static struct ether_addr n;

	return (_ether_aton(s, &n) ? &n : NULL);
}

void
bridge_usage()
{
	diag_printf("usage: brconfig -a\n");
	diag_printf(
	    "usage: brconfig interface [up] [down] [add if] [del if] ...\n");
}


int
bridge_ifsetflag(s, brdg, ifsname, flag)
	int s;
	char *brdg, *ifsname;
	u_int32_t flag;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	strncpy(req.ifbr_ifsname, ifsname, sizeof(req.ifbr_ifsname));
	if (ioctl(s, SIOCBRDGGIFFLGS, (caddr_t)&req) < 0) {
		return (1);
	}

	req.ifbr_ifsflags |= flag;

	if (ioctl(s, SIOCBRDGSIFFLGS, (caddr_t)&req) < 0) {
		warnx3("%s: %s", brdg, ifsname);
		return (1);
	}
	return (0);
}

int
bridge_ifclrflag(s, brdg, ifsname, flag)
	int s;
	char *brdg, *ifsname;
	u_int32_t flag;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	strncpy(req.ifbr_ifsname, ifsname, sizeof(req.ifbr_ifsname));

	if (ioctl(s, SIOCBRDGGIFFLGS, (caddr_t)&req) < 0) {
		warnx3("%s: %s", brdg, ifsname);
		return (1);
	}

	req.ifbr_ifsflags &= ~flag;

	if (ioctl(s, SIOCBRDGSIFFLGS, (caddr_t)&req) < 0) {
		warnx3("%s: %s", brdg, ifsname);
		return (1);
	}
	return (0);
}

int
bridge_show_all(s)
	int s;
{
	char *inbuf = NULL;
	struct ifconf ifc;
	struct ifreq *ifrp, ifreq;
	int len = 8192, i;

	while (1) {
		ifc.ifc_len = len;
		ifc.ifc_buf = inbuf = realloc(inbuf, len);
		if (inbuf == NULL)
			err(1, "malloc");
		if (ioctl(s, SIOCGIFCONF, &ifc) < 0)
			err(1, "ioctl(SIOCGIFCONF)");
		if (ifc.ifc_len + sizeof(struct ifreq) < len)
			break;
		len *= 2;
	}
	ifrp = ifc.ifc_req;
	ifreq.ifr_name[0] = '\0';
	for (i = 0; i < ifc.ifc_len; ) {
		ifrp = (struct ifreq *)((caddr_t)ifc.ifc_req + i);
		i += sizeof(ifrp->ifr_name) +
		    (ifrp->ifr_addr.sa_len > sizeof(struct sockaddr) ?
		    ifrp->ifr_addr.sa_len : sizeof(struct sockaddr));
		if (ifrp->ifr_addr.sa_family != AF_LINK)
			continue;
		if (!is_bridge(s, ifrp->ifr_name))
			continue;
		bridge_status(s, ifrp->ifr_name);
	}
        free(ifc.ifc_buf);
	return (0);
}

int
bridge_setflag(s, brdg, f)
	int s;
	char *brdg;
	short f;
{
	struct ifreq ifr;

	strncpy(ifr.ifr_name, brdg, sizeof(ifr.ifr_name));

	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
		warnx2("%s", brdg);
		if (errno == EPERM)
			return (1);
		return (1);
	}

	ifr.ifr_flags |= f;

	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
		warnx2("%s", brdg);
		if (errno == EPERM)
			return (1);
		return (1);
	}

	return (0);
}

int
bridge_clrflag(s, brdg, f)
	int s;
	char *brdg;
	short f;
{
	struct ifreq ifr;

	strncpy(ifr.ifr_name, brdg, sizeof(ifr.ifr_name));

	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
		warnx2("%s", brdg);
		if (errno == EPERM)
			return (1);
		return (1);
	}

	ifr.ifr_flags &= ~(f);

	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
		warnx2("%s", brdg);
		if (errno == EPERM)
			return (1);
		return (1);
	}

	return (0);
}

int
bridge_flushall(s, brdg)
	int s;
	char *brdg;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	req.ifbr_ifsflags = IFBF_FLUSHALL;
	if (ioctl(s, SIOCBRDGFLUSH, &req) < 0) {
		warnx2("%s", brdg);
		return (1);
	}
	return (0);
}

int
bridge_flush(s, brdg)
	int s;
	char *brdg;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	req.ifbr_ifsflags = IFBF_FLUSHDYN;
	if (ioctl(s, SIOCBRDGFLUSH, &req) < 0) {
		warnx2("%s", brdg);
		return (1);
	}
	return (0);
}

int
bridge_list(s, brdg, delim)
	int s;
	char *brdg, *delim;
{
	struct ifbreq *reqp;
	struct ifbifconf bifc;
	int i, len = 8192;
	char buf[sizeof(reqp->ifbr_ifsname) + 1], *inbuf = NULL;

	while (1) {
		strncpy(bifc.ifbic_name, brdg, sizeof(bifc.ifbic_name));
		bifc.ifbic_len = len;
		bifc.ifbic_buf = inbuf = realloc(inbuf, len);
		if (inbuf == NULL)
			err(1, "malloc");
		if (ioctl(s, SIOCBRDGIFS, &bifc) < 0)
			err(1, brdg);
		if (bifc.ifbic_len + sizeof(*reqp) < len)
			break;
		len *= 2;
	}
	for (i = 0; i < bifc.ifbic_len / sizeof(*reqp); i++) {
		reqp = bifc.ifbic_req + i;
		strncpy(buf, reqp->ifbr_ifsname, sizeof(buf));
		diag_printf("%s%s ", delim, buf);
		printb("flags", reqp->ifbr_ifsflags, IFBIFBITS);
		diag_printf("\n");
		bridge_rules(s, brdg, buf, delim);
	}
	free(bifc.ifbic_buf);
	return (0);             /* NOTREACHED */
}

int
bridge_add(s, brdg, ifn)
	int s;
	char *brdg, *ifn;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	strncpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
	if (ioctl(s, SIOCBRDGADD, &req) < 0) {
		warnx3("%s: %s", brdg, ifn);
		if (errno == EPERM)
			return (1);
		return (1);
	}
	return (0);
}

int
bridge_delete(s, brdg, ifn)
	int s;
	char *brdg, *ifn;
{
	struct ifbreq req;

	strncpy(req.ifbr_name, brdg, sizeof(req.ifbr_name));
	strncpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
	if (ioctl(s, SIOCBRDGDEL, &req) < 0) {
		warnx3("%s: %s", brdg, ifn);
		if (errno == EPERM)
			return (1);
		return (1);
	}
	return (0);
}

int
bridge_timeout(s, brdg, arg)
	int s;
	char *brdg, *arg;
{
	struct ifbcachetoreq ifbct;
	u_int32_t newtime;
	char *endptr;

	newtime = strtoul(arg, &endptr, 0);
	if (arg[0] == '\0' || endptr[0] != '\0') {
		diag_printf("invalid arg for timeout: %s\n", arg);
		return (1);
	}

	strncpy(ifbct.ifbct_name, brdg, sizeof(ifbct.ifbct_name));
	ifbct.ifbct_time = newtime;
	if (ioctl(s, SIOCBRDGSTO, (caddr_t)&ifbct) < 0) {
		warnx2("%s", brdg);
		return (1);
	}
	return (0);
}

int
bridge_maxaddr(s, brdg, arg)
	int s;
	char *brdg, *arg;
{
	struct ifbcachereq ifbc;
	u_int32_t newsize;
	char *endptr;

	newsize = strtoul(arg, &endptr, 0);
	if (arg[0] == '\0' || endptr[0] != '\0') {
		diag_printf("invalid arg for maxaddr: %s\n", arg);
		return (1);
	}

	strncpy(ifbc.ifbc_name, brdg, sizeof(ifbc.ifbc_name));
	ifbc.ifbc_size = newsize;
	if (ioctl(s, SIOCBRDGSCACHE, (caddr_t)&ifbc) < 0) {
		warnx2("%s", brdg);
		return (1);
	}
	return (0);
}

int
bridge_deladdr(s, brdg, addr)
	int s;
	char *brdg, *addr;
{
	struct ifbareq ifba;
	struct ether_addr *ea;

	strncpy(ifba.ifba_name, brdg, sizeof(ifba.ifba_name));
	ea = ether_aton(addr);
	if (ea == NULL) {
		warnx2("Invalid address: %s", addr);
		return (1);
	}
	bcopy(ea, &ifba.ifba_dst, sizeof(struct ether_addr));