1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011 NetApp, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
20 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
24 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
25 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/types.h>
29#include <net/ethernet.h>
30
31#include <assert.h>
32#include <errno.h>
33#include <limits.h>
34#include <md5.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38
39#include "bhyverun.h"
40#include "config.h"
41#include "debug.h"
42#include "net_utils.h"
43
44int
45net_parsemac(const char *mac_str, uint8_t *mac_addr)
46{
47        struct ether_addr *ea;
48        char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
49
50	if (mac_str == NULL)
51		return (EINVAL);
52
53	ea = ether_aton(mac_str);
54
55	if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
56	    memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
57		EPRINTLN("Invalid MAC %s", mac_str);
58		return (EINVAL);
59	} else
60		memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
61
62        return (0);
63}
64
65int
66net_parsemtu(const char *mtu_str, unsigned long *mtu)
67{
68	char *end;
69	unsigned long val;
70
71	assert(mtu_str != NULL);
72
73	if (*mtu_str == '-')
74		goto err;
75
76	val = strtoul(mtu_str, &end, 0);
77
78	if (*end != '\0')
79		goto err;
80
81	if (val == ULONG_MAX)
82		return (ERANGE);
83
84	if (val == 0 && errno == EINVAL)
85		return (EINVAL);
86
87	*mtu = val;
88
89	return (0);
90
91err:
92	errno = EINVAL;
93	return (EINVAL);
94}
95
96void
97net_genmac(struct pci_devinst *pi, uint8_t *macaddr)
98{
99	/*
100	 * The default MAC address is the standard NetApp OUI of 00-a0-98,
101	 * followed by an MD5 of the PCI slot/func number and dev name
102	 */
103	MD5_CTX mdctx;
104	unsigned char digest[16];
105	char nstr[80];
106
107	snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
108	    pi->pi_func, get_config_value("name"));
109
110	MD5Init(&mdctx);
111	MD5Update(&mdctx, nstr, (unsigned int)strlen(nstr));
112	MD5Final(digest, &mdctx);
113
114	macaddr[0] = 0x00;
115	macaddr[1] = 0xa0;
116	macaddr[2] = 0x98;
117	macaddr[3] = digest[0];
118	macaddr[4] = digest[1];
119	macaddr[5] = digest[2];
120}
121