| /* |
| * dhcpcd - DHCP client daemon |
| * Copyright (c) 2006-2012 Roy Marples <roy@marples.name> |
| * All rights reserved |
| |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <syslog.h> |
| |
| #include "common.h" |
| #include "platform.h" |
| |
| static const char *mproc = |
| #if defined(__alpha__) |
| "system type" |
| #elif defined(__arm__) |
| "Hardware" |
| #elif defined(__avr32__) |
| "cpu family" |
| #elif defined(__bfin__) |
| "BOARD Name" |
| #elif defined(__cris__) |
| "cpu model" |
| #elif defined(__frv__) |
| "System" |
| #elif defined(__i386__) || defined(__x86_64__) |
| "vendor_id" |
| #elif defined(__ia64__) |
| "vendor" |
| #elif defined(__hppa__) |
| "model" |
| #elif defined(__m68k__) |
| "MMU" |
| #elif defined(__mips__) |
| "system type" |
| #elif defined(__powerpc__) || defined(__powerpc64__) |
| "machine" |
| #elif defined(__s390__) || defined(__s390x__) |
| "Manufacturer" |
| #elif defined(__sh__) |
| "machine" |
| #elif defined(sparc) || defined(__sparc__) |
| "cpu" |
| #elif defined(__vax__) |
| "cpu" |
| #else |
| NULL |
| #endif |
| ; |
| |
| char * |
| hardware_platform(void) |
| { |
| FILE *fp; |
| char *buf, *p; |
| |
| if (mproc == NULL) { |
| errno = EINVAL; |
| return NULL; |
| } |
| |
| fp = fopen("/proc/cpuinfo", "r"); |
| if (fp == NULL) |
| return NULL; |
| |
| p = NULL; |
| while ((buf = get_line(fp))) { |
| if (strncmp(buf, mproc, strlen(mproc)) == 0) { |
| p = strchr(buf, ':'); |
| if (p != NULL && ++p != NULL) { |
| while (*p == ' ') |
| p++; |
| break; |
| } |
| } |
| } |
| fclose(fp); |
| |
| if (p == NULL) |
| errno = ESRCH; |
| return p; |
| } |
| |
| static int |
| check_proc_int(const char *path) |
| { |
| FILE *fp; |
| char *buf; |
| |
| fp = fopen(path, "r"); |
| if (fp == NULL) |
| return -1; |
| buf = get_line(fp); |
| fclose(fp); |
| if (buf == NULL) |
| return -1; |
| return atoi(buf); |
| } |
| |
| static const char *prefix = "/proc/sys/net/ipv6/conf"; |
| |
| int |
| check_ipv6(const char *ifname) |
| { |
| int r; |
| char path[256]; |
| |
| if (ifname == NULL) |
| ifname = "all"; |
| |
| snprintf(path, sizeof(path), "%s/%s/accept_ra", prefix, ifname); |
| r = check_proc_int(path); |
| if (r != 1 && r != 2) { |
| syslog(LOG_WARNING, |
| "%s: not configured to accept IPv6 RAs", ifname); |
| return 0; |
| } |
| |
| if (r != 2) { |
| snprintf(path, sizeof(path), "%s/%s/forwarding", |
| prefix, ifname); |
| if (check_proc_int(path) != 0) { |
| syslog(LOG_WARNING, |
| "%s: configured as a router, not a host", ifname); |
| return 0; |
| } |
| } |
| return 1; |
| } |