1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27
28#include <fstream>
29#include "fcntl.h"
30#include "Handle.h"
31#include "Trace.h"
32#include "Exceptions.h"
33#include "sun_fc.h"
34#include <unistd.h>
35
36#ifdef  __cplusplus
37extern "C" {
38#endif
39
40void get_random_bytes(HBA_UINT8 *ptr, size_t len) {
41	int fd = open("/dev/urandom", O_RDONLY);
42	size_t resid = len;
43	ssize_t bytes;
44
45	while (resid != 0) {
46		bytes = read(fd, ptr, resid);
47		ptr += bytes;
48		resid -= bytes;
49	}
50	close (fd);
51	return;
52}
53
54HBA_STATUS Sun_fcAdapterCreateWWN(HBA_HANDLE handle,
55    HBA_UINT32 portindex, HBA_WWN *nwwn, HBA_WWN *pwwn,
56    HBA_WWN *OUI, HBA_INT32 method) {
57	HBA_UINT8	randombyte[5] = {0};
58	HBA_WWN		randomwwn = {0};
59	int		index = 0;
60
61        Trace log("Sun_fcAdapterCreateWWN");
62
63        if ((nwwn == NULL) || (pwwn == NULL)) {
64                log.userError(
65                    "NULL WWN pointer");
66                return (HBA_STATUS_ERROR_ARG);
67        }
68	if (method == HBA_CREATE_WWN_FACTORY) {
69		return (HBA_STATUS_ERROR_NOT_SUPPORTED);
70	}
71
72        try {
73		/* create EUI-64 Mapped WWN */
74		if (OUI == NULL) {
75			/* if no OUI spec'd, used one of Sun's */
76			randomwwn.wwn[index++] = 0x0;
77			randomwwn.wwn[index++] = 0x0;
78			randomwwn.wwn[index++] = 0x7D;
79		} else {
80			memcpy(randomwwn.wwn, OUI->wwn, sizeof(HBA_WWN));
81			index += 3;
82		}
83		/*
84		 * for EUI-64 mapped, shift OUI first byte right two bits
85		 * then set top two bits to 11
86		 */
87		randomwwn.wwn[0] = randomwwn.wwn[0] >> 2;
88		randomwwn.wwn[0] = randomwwn.wwn[0] | 0xc0;
89
90		/* now create and add 40 random bits */
91		get_random_bytes(randombyte, 5);
92		memcpy(randomwwn.wwn+index, randombyte, 5);
93
94		memcpy(nwwn->wwn, randomwwn.wwn, sizeof(HBA_WWN));
95
96		/* toggle lowest bit, to make NWWN and PWWN unique */
97		randomwwn.wwn[7] = randomwwn.wwn[7] ^ 1;
98		memcpy(pwwn->wwn, randomwwn.wwn, sizeof(HBA_WWN));
99
100                return (HBA_STATUS_OK);
101        } catch (HBAException &e) {
102                return (e.getErrorCode());
103        } catch (...) {
104                log.internalError(
105                    "Uncaught exception");
106                return (HBA_STATUS_ERROR);
107        }
108}
109#ifdef  __cplusplus
110}
111#endif
112