1 /*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2012 Roy Marples <roy@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 <errno.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <syslog.h>
33
34 #include "common.h"
35 #include "platform.h"
36
37 static const char *mproc =
38 #if defined(__alpha__)
39 "system type"
40 #elif defined(__arm__)
41 "Hardware"
42 #elif defined(__avr32__)
43 "cpu family"
44 #elif defined(__bfin__)
45 "BOARD Name"
46 #elif defined(__cris__)
47 "cpu model"
48 #elif defined(__frv__)
49 "System"
50 #elif defined(__i386__) || defined(__x86_64__)
51 "vendor_id"
52 #elif defined(__ia64__)
53 "vendor"
54 #elif defined(__hppa__)
55 "model"
56 #elif defined(__m68k__)
57 "MMU"
58 #elif defined(__mips__)
59 "system type"
60 #elif defined(__powerpc__) || defined(__powerpc64__)
61 "machine"
62 #elif defined(__s390__) || defined(__s390x__)
63 "Manufacturer"
64 #elif defined(__sh__)
65 "machine"
66 #elif defined(sparc) || defined(__sparc__)
67 "cpu"
68 #elif defined(__vax__)
69 "cpu"
70 #else
71 NULL
72 #endif
73 ;
74
75 char *
hardware_platform(void)76 hardware_platform(void)
77 {
78 FILE *fp;
79 char *buf, *p;
80
81 if (mproc == NULL) {
82 errno = EINVAL;
83 return NULL;
84 }
85
86 fp = fopen("/proc/cpuinfo", "r");
87 if (fp == NULL)
88 return NULL;
89
90 p = NULL;
91 while ((buf = get_line(fp))) {
92 if (strncmp(buf, mproc, strlen(mproc)) == 0) {
93 p = strchr(buf, ':');
94 if (p != NULL && ++p != NULL) {
95 while (*p == ' ')
96 p++;
97 break;
98 }
99 }
100 }
101 fclose(fp);
102
103 if (p == NULL)
104 errno = ESRCH;
105 return p;
106 }
107
108 static int
check_proc_int(const char * path)109 check_proc_int(const char *path)
110 {
111 FILE *fp;
112 char *buf;
113
114 fp = fopen(path, "r");
115 if (fp == NULL)
116 return -1;
117 buf = get_line(fp);
118 fclose(fp);
119 if (buf == NULL)
120 return -1;
121 return atoi(buf);
122 }
123
124 static const char *prefix = "/proc/sys/net/ipv6/conf";
125
126 int
check_ipv6(const char * ifname)127 check_ipv6(const char *ifname)
128 {
129 int r;
130 char path[256];
131
132 if (ifname == NULL)
133 ifname = "all";
134
135 snprintf(path, sizeof(path), "%s/%s/accept_ra", prefix, ifname);
136 r = check_proc_int(path);
137 if (r != 1 && r != 2) {
138 syslog(LOG_WARNING,
139 "%s: not configured to accept IPv6 RAs", ifname);
140 return 0;
141 }
142
143 if (r != 2) {
144 snprintf(path, sizeof(path), "%s/%s/forwarding",
145 prefix, ifname);
146 if (check_proc_int(path) != 0) {
147 syslog(LOG_WARNING,
148 "%s: configured as a router, not a host", ifname);
149 return 0;
150 }
151 }
152 return 1;
153 }
154