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