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/cdefs.h>
29
30 #include <sys/types.h>
31 #include <net/ethernet.h>
32
33 #include <assert.h>
34 #include <errno.h>
35 #include <limits.h>
36 #include <md5.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "bhyverun.h"
42 #include "config.h"
43 #include "debug.h"
44 #include "net_utils.h"
45
46 int
net_parsemac(const char * mac_str,uint8_t * mac_addr)47 net_parsemac(const char *mac_str, uint8_t *mac_addr)
48 {
49 struct ether_addr *ea;
50 char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
51
52 if (mac_str == NULL)
53 return (EINVAL);
54
55 ea = ether_aton(mac_str);
56
57 if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
58 memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
59 EPRINTLN("Invalid MAC %s", mac_str);
60 return (EINVAL);
61 } else
62 memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
63
64 return (0);
65 }
66
67 int
net_parsemtu(const char * mtu_str,unsigned long * mtu)68 net_parsemtu(const char *mtu_str, unsigned long *mtu)
69 {
70 char *end;
71 unsigned long val;
72
73 assert(mtu_str != NULL);
74
75 if (*mtu_str == '-')
76 goto err;
77
78 val = strtoul(mtu_str, &end, 0);
79
80 if (*end != '\0')
81 goto err;
82
83 if (val == ULONG_MAX)
84 return (ERANGE);
85
86 if (val == 0 && errno == EINVAL)
87 return (EINVAL);
88
89 *mtu = val;
90
91 return (0);
92
93 err:
94 errno = EINVAL;
95 return (EINVAL);
96 }
97
98 void
net_genmac(struct pci_devinst * pi,uint8_t * macaddr)99 net_genmac(struct pci_devinst *pi, uint8_t *macaddr)
100 {
101 /*
102 * The default MAC address is the standard NetApp OUI of 00-a0-98,
103 * followed by an MD5 of the PCI slot/func number and dev name
104 */
105 MD5_CTX mdctx;
106 unsigned char digest[16];
107 char nstr[80];
108
109 snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
110 pi->pi_func, get_config_value("name"));
111
112 MD5Init(&mdctx);
113 MD5Update(&mdctx, nstr, (unsigned int)strlen(nstr));
114 MD5Final(digest, &mdctx);
115
116 macaddr[0] = 0x00;
117 macaddr[1] = 0xa0;
118 macaddr[2] = 0x98;
119 macaddr[3] = digest[0];
120 macaddr[4] = digest[1];
121 macaddr[5] = digest[2];
122 }
123