69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/*
|
|
* This file is part of the UCB release of Plan 9. It is subject to the license
|
|
* terms in the LICENSE file found in the top-level directory of this
|
|
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
|
|
* part of the UCB release of Plan 9, including this file, may be copied,
|
|
* modified, propagated, or distributed except according to the terms contained
|
|
* in the LICENSE file.
|
|
*/
|
|
|
|
#include <u.h>
|
|
#include <lib9.h>
|
|
#include <ip.h>
|
|
|
|
/* from the kernel. Sorry. */
|
|
enum {
|
|
Nipht = 521, /* convenient prime */
|
|
};
|
|
|
|
/* Jehanne iphash() from ip/ipaux.c */
|
|
uint32_t
|
|
iphash(uint8_t *sa, uint16_t sp, uint8_t *da, uint16_t dp)
|
|
{
|
|
return (((uint32_t)(sa[IPaddrlen-1])<<24) ^ (sp << 16) ^ (((uint32_t)da[IPaddrlen-1])<<8) ^ dp ) % Nipht;
|
|
}
|
|
|
|
/* old Nix iphash (worked with kenc) */
|
|
uint32_t oldiphash(uint8_t * sa, uint16_t sp, uint8_t * da, uint16_t dp)
|
|
{
|
|
return ((sa[IPaddrlen - 1] << 24) ^ (sp << 16) ^ (da[IPaddrlen - 1] << 8) ^
|
|
dp) % Nipht;
|
|
}
|
|
|
|
/* conventions.
|
|
* informational messages go on fd 2.
|
|
* PASS/FAIL go on fd 1 and there is only ever one of each.
|
|
* The first four characters of passing tests are PASS
|
|
* The first four characters of failing tests are FAIL
|
|
* It is an error to print both PASS and FAIL
|
|
* FAIL tests should exits() with a message
|
|
* We may consider not printing PASS/FAIL and using exits instead.
|
|
*/
|
|
void
|
|
main()
|
|
{
|
|
static uint8_t sa[IPaddrlen] = { 0x80, };
|
|
static uint8_t da[IPaddrlen];
|
|
uint16_t sp = 4;
|
|
uint16_t dp = 5;
|
|
uint32_t ohash, nhash;
|
|
sa[IPaddrlen - 1] = 0x80;
|
|
ohash = oldiphash(sa, sp, da, dp);
|
|
if (ohash > Nipht)
|
|
fprint(2, "oldiphash returns bad value: 0x%ulx, should be < 0x%ulx\n",
|
|
ohash, Nipht);
|
|
nhash = iphash(sa, sp, da, dp);
|
|
if (nhash > Nipht)
|
|
fprint(2, "iphash returns bad value: 0x%ulx, should be < 0x%ulx\n",
|
|
ohash, Nipht);
|
|
fprint(2, "ohash is 0x%ulx, nhash is 0x%ulx\n", ohash, nhash);
|
|
if (ohash == nhash) {
|
|
/* ohash and nhash should differs on gcc due to type promotion rules */
|
|
fprint(2, "FAIL: iphash equals\n");
|
|
exits("FAIL");
|
|
}
|
|
/* Always print PASS at the end. */
|
|
print("PASS\n");
|
|
exits("PASS");
|
|
}
|