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
44 int
net_parsemac(const char * mac_str,uint8_t * mac_addr)45 net_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
65 int
net_parsemtu(const char * mtu_str,unsigned long * mtu)66 net_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
91 err:
92 errno = EINVAL;
93 return (EINVAL);
94 }
95
96 void
net_genmac(struct pci_devinst * pi,uint8_t * macaddr)97 net_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