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 "debug.h" 44 #include "net_utils.h" 45 46 int 47 net_parsemac(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 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 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, vmname); 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