mirror of
https://github.com/rsmarples/dhcpcd.git
synced 2024-11-28 12:33:49 +08:00
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
|
|
* 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 <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/utsname.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <syslog.h>
|
|
|
|
#include "if-options.h"
|
|
#include "platform.h"
|
|
|
|
#ifndef SYS_NMLN /* OSX */
|
|
# define SYS_NMLN 256
|
|
#endif
|
|
|
|
static char march[SYS_NMLN];
|
|
|
|
char *
|
|
hardware_platform(void)
|
|
{
|
|
int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
|
|
size_t len = sizeof(march);
|
|
|
|
if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
|
|
march, &len, NULL, 0) != 0)
|
|
return NULL;
|
|
return march;
|
|
}
|
|
|
|
#define get_inet6_sysctl(code) inet6_sysctl(code, 0, 0)
|
|
#define set_inet6_sysctl(code, val) inet6_sysctl(code, val, 1)
|
|
static int
|
|
inet6_sysctl(int code, int val, int action)
|
|
{
|
|
int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
|
|
size_t size;
|
|
|
|
mib[3] = code;
|
|
size = sizeof(val);
|
|
if (action) {
|
|
if (sysctl(mib, sizeof(mib)/sizeof(mib[0]),
|
|
NULL, 0, &val, size) == -1)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &val, &size, NULL, 0) == -1)
|
|
return -1;
|
|
return val;
|
|
}
|
|
|
|
static void
|
|
restore_kernel_ra(void)
|
|
{
|
|
|
|
if (options & DHCPCD_FORKED)
|
|
return;
|
|
syslog(LOG_INFO, "restoring Kernel IPv6 RA support");
|
|
if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 1) == -1)
|
|
syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
|
|
}
|
|
|
|
int
|
|
check_ipv6(const char *ifname)
|
|
{
|
|
int val;
|
|
|
|
/* BSD doesn't support these values per iface, so just return 1 */
|
|
if (ifname)
|
|
return 1;
|
|
|
|
val = get_inet6_sysctl(IPV6CTL_ACCEPT_RTADV);
|
|
if (val == 0)
|
|
options |= DHCPCD_IPV6RA_OWN;
|
|
else if (options & DHCPCD_IPV6RA_OWN) {
|
|
syslog(LOG_INFO, "disabling Kernel IPv6 RA support");
|
|
if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 0) == -1) {
|
|
syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
|
|
return 0;
|
|
}
|
|
atexit(restore_kernel_ra);
|
|
}
|
|
return 1;
|
|
if (get_inet6_sysctl(IPV6CTL_FORWARDING) != 0) {
|
|
syslog(LOG_WARNING,
|
|
"Kernel is configured as a router, not a host");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|