172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* 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
|
|
static char sccsid[] = "@(#)af.c 8.1 (Berkeley) 6/5/93";
|
|
#endif /* not lint */
|
|
|
|
#include "defs.h"
|
|
|
|
/*
|
|
* Address family support routines
|
|
*/
|
|
int inet_hash(), inet_netmatch(), inet_output(),
|
|
inet_portmatch(), inet_portcheck(),
|
|
inet_checkhost(), inet_rtflags(), inet_sendroute(), inet_canon();
|
|
char *inet_format();
|
|
|
|
#define NIL { 0 }
|
|
#define INET \
|
|
{ inet_hash, inet_netmatch, inet_output, \
|
|
inet_portmatch, inet_portcheck, inet_checkhost, \
|
|
inet_rtflags, inet_sendroute, inet_canon, \
|
|
inet_format \
|
|
}
|
|
|
|
struct afswitch afswitch[AF_MAX] = {
|
|
NIL, /* 0- unused */
|
|
NIL, /* 1- Unix domain, unused */
|
|
INET, /* Internet */
|
|
};
|
|
|
|
int af_max = sizeof(afswitch) / sizeof(afswitch[0]);
|
|
|
|
struct sockaddr_in inet_default = {
|
|
#ifdef RTM_ADD
|
|
sizeof (inet_default),
|
|
#endif
|
|
AF_INET, INADDR_ANY };
|
|
|
|
inet_hash(sin, hp)
|
|
register struct sockaddr_in *sin;
|
|
struct afhash *hp;
|
|
{
|
|
register u_long n;
|
|
|
|
n = inet_netof(sin->sin_addr);
|
|
if (n)
|
|
while ((n & 0xff) == 0)
|
|
n >>= 8;
|
|
hp->afh_nethash = n;
|
|
hp->afh_hosthash = ntohl(sin->sin_addr.s_addr);
|
|
hp->afh_hosthash &= 0x7fffffff;
|
|
}
|
|
|
|
inet_netmatch(sin1, sin2)
|
|
struct sockaddr_in *sin1, *sin2;
|
|
{
|
|
|
|
return (inet_netof(sin1->sin_addr) == inet_netof(sin2->sin_addr));
|
|
}
|
|
|
|
/*
|
|
* Verify the message is from the right port.
|
|
*/
|
|
inet_portmatch(sin)
|
|
register struct sockaddr_in *sin;
|
|
{
|
|
|
|
return (sin->sin_port == sp->s_port);
|
|
}
|
|
|
|
/*
|
|
* Verify the message is from a "trusted" port.
|
|
*/
|
|
inet_portcheck(sin)
|
|
struct sockaddr_in *sin;
|
|
{
|
|
|
|
return (ntohs(sin->sin_port) <= IPPORT_RESERVED);
|
|
}
|
|
|
|
/*
|
|
* Internet output routine.
|
|
*/
|
|
inet_output(s, flags, sin, size)
|
|
int s, flags;
|
|
struct sockaddr_in *sin;
|
|
int size;
|
|
{
|
|
struct sockaddr_in dst;
|
|
|
|
dst = *sin;
|
|
sin = &dst;
|
|
if (sin->sin_port == 0)
|
|
sin->sin_port = sp->s_port;
|
|
if (sin->sin_len == 0)
|
|
sin->sin_len = sizeof (*sin);
|
|
if (sendto(s, packet, size, flags,
|
|
(struct sockaddr *)sin, sizeof (*sin)) < 0)
|
|
perror("sendto");
|
|
}
|
|
|
|
/*
|
|
* Return 1 if the address is believed
|
|
* for an Internet host -- THIS IS A KLUDGE.
|
|
*/
|
|
inet_checkhost(sin)
|
|
struct sockaddr_in *sin;
|
|
{
|
|
u_long i = ntohl(sin->sin_addr.s_addr);
|
|
|
|
#ifndef IN_EXPERIMENTAL
|
|
#define IN_EXPERIMENTAL(i) (((long) (i) & 0xe0000000) == 0xe0000000)
|
|
#endif
|
|
|
|
if (IN_EXPERIMENTAL(i) || sin->sin_port != 0)
|
|
return (0);
|
|
if (i != 0 && (i & 0xff000000) == 0)
|
|
return (0);
|
|
for (i = 0; i < sizeof(sin->sin_zero)/sizeof(sin->sin_zero[0]); i++)
|
|
if (sin->sin_zero[i])
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
inet_canon(sin)
|
|
struct sockaddr_in *sin;
|
|
{
|
|
|
|
sin->sin_port = 0;
|
|
sin->sin_len = sizeof(*sin);
|
|
}
|
|
|
|
char *
|
|
inet_format(sin)
|
|
struct sockaddr_in *sin;
|
|
{
|
|
char *inet_ntoa();
|
|
|
|
return (inet_ntoa(sin->sin_addr));
|
|
}
|