1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <net/ethernet.h> 33 34 #include <assert.h> 35 #include <errno.h> 36 #include <limits.h> 37 #include <md5.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #include "bhyverun.h" 43 #include "config.h" 44 #include "debug.h" 45 #include "net_utils.h" 46 47 int 48 net_parsemac(const char *mac_str, uint8_t *mac_addr) 49 { 50 struct ether_addr *ea; 51 char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 }; 52 53 if (mac_str == NULL) 54 return (EINVAL); 55 56 ea = ether_aton(mac_str); 57 58 if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) || 59 memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) { 60 EPRINTLN("Invalid MAC %s", mac_str); 61 return (EINVAL); 62 } else 63 memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN); 64 65 return (0); 66 } 67 68 int 69 net_parsemtu(const char *mtu_str, unsigned long *mtu) 70 { 71 char *end; 72 unsigned long val; 73 74 assert(mtu_str != NULL); 75 76 if (*mtu_str == '-') 77 goto err; 78 79 val = strtoul(mtu_str, &end, 0); 80 81 if (*end != '\0') 82 goto err; 83 84 if (val == ULONG_MAX) 85 return (ERANGE); 86 87 if (val == 0 && errno == EINVAL) 88 return (EINVAL); 89 90 *mtu = val; 91 92 return (0); 93 94 err: 95 errno = EINVAL; 96 return (EINVAL); 97 } 98 99 void 100 net_genmac(struct pci_devinst *pi, uint8_t *macaddr) 101 { 102 /* 103 * The default MAC address is the standard NetApp OUI of 00-a0-98, 104 * followed by an MD5 of the PCI slot/func number and dev name 105 */ 106 MD5_CTX mdctx; 107 unsigned char digest[16]; 108 char nstr[80]; 109 110 snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot, 111 pi->pi_func, get_config_value("name")); 112 113 MD5Init(&mdctx); 114 MD5Update(&mdctx, nstr, (unsigned int)strlen(nstr)); 115 MD5Final(digest, &mdctx); 116 117 macaddr[0] = 0x00; 118 macaddr[1] = 0xa0; 119 macaddr[2] = 0x98; 120 macaddr[3] = digest[0]; 121 macaddr[4] = digest[1]; 122 macaddr[5] = digest[2]; 123 } 124