1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2012 Roy Marples <roy (at) marples.name> 4 * All rights reserved 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 PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/socket.h> 30 #include <sys/sysctl.h> 31 #include <sys/utsname.h> 32 #include <netinet/in.h> 33 34 #include <syslog.h> 35 36 #include "platform.h" 37 38 #ifndef SYS_NMLN /* OSX */ 39 # define SYS_NMLN 256 40 #endif 41 42 static char march[SYS_NMLN]; 43 44 char * 45 hardware_platform(void) 46 { 47 int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 48 size_t len = sizeof(march); 49 50 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), 51 march, &len, NULL, 0) != 0) 52 return NULL; 53 return march; 54 } 55 56 static int 57 inet6_sysctl(int code) 58 { 59 int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 }; 60 int val; 61 size_t size; 62 63 mib[3] = code; 64 size = sizeof(val); 65 if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &val, &size, NULL, 0) == -1) 66 return -1; 67 return val; 68 } 69 70 int 71 check_ipv6(const char *ifname) 72 { 73 74 /* BSD doesn't support these values per iface, so just reutrn 1 */ 75 if (ifname) 76 return 1; 77 78 if (inet6_sysctl(IPV6CTL_ACCEPT_RTADV) != 1) { 79 syslog(LOG_WARNING, 80 "Kernel is not configured to accept IPv6 RAs"); 81 return 0; 82 } 83 if (inet6_sysctl(IPV6CTL_FORWARDING) != 0) { 84 syslog(LOG_WARNING, 85 "Kernel is configured as a router, not a host"); 86 return 0; 87 } 88 return 1; 89 } 90
