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/* $KTH: lsb_addr_comp.c,v 1.9 1997/04/01 08:18:37 joda Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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 Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*/
#include "krb_locl.h"
#include "lsb_addr_comp.h"
int
krb_lsb_antinet_ulong_cmp(u_int32_t x, u_int32_t y)
{
int i;
u_int32_t a = 0, b = 0;
u_int8_t *p = (u_int8_t*) &x;
u_int8_t *q = (u_int8_t*) &y;
for(i = sizeof(u_int32_t) - 1; i >= 0; i--){
a = (a << 8) | p[i];
b = (b << 8) | q[i];
}
if(a > b)
return 1;
if(a < b)
return -1;
return 0;
}
int
krb_lsb_antinet_ushort_cmp(u_int16_t x, u_int16_t y)
{
int i;
u_int16_t a = 0, b = 0;
u_int8_t *p = (u_int8_t*) &x;
u_int8_t *q = (u_int8_t*) &y;
for(i = sizeof(u_int16_t) - 1; i >= 0; i--){
a = (a << 8) | p[i];
b = (b << 8) | q[i];
}
if(a > b)
return 1;
if(a < b)
return -1;
return 0;
}
u_int32_t
lsb_time(time_t t, struct sockaddr_in *src, struct sockaddr_in *dst)
{
/*
* direction bit is the sign bit of the timestamp. Ok until
* 2038??
*/
/* For compatibility with broken old code, compares are done in VAX
byte order (LSBFIRST) */
if (krb_lsb_antinet_ulong_less(src->sin_addr.s_addr, /* src < recv */
dst->sin_addr.s_addr) < 0)
t = -t;
else if (krb_lsb_antinet_ulong_less(src->sin_addr.s_addr,
dst->sin_addr.s_addr)==0)
if (krb_lsb_antinet_ushort_less(src->sin_port, dst->sin_port) < 0)
t = -t;
/*
* all that for one tiny bit! Heaven help those that talk to
* themselves.
*/
t = t & 0xffffffff;
return t;
}
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