a2af890d85
* 20-resolv.conf now uses the correct variable for $IF_METRIC * Exclude interface values when dumping the lease * Parse static value subnet_mask when it exists instead of deriving from ip address * logger calls now resemble dhcpcd calls to syslog(3) * Reject offered IP address if INADDR_BROADCAST or INADDR_ANY * Change the route if source address has changed * Note the address we are requesting in the broadcast log entry * When operating on one interface, respect the timeout for in dhcpcd.conf * Escape | and & characters before passing the value to the shell Ensure we set a valid hostname, DNS domain and NIS domain. Document the need for input validation in dhcpcd-run-hooks(8). Fixes CVE-2011-996 Based on a patch to dhcpcd-3 by Marius Tomaschewski <mt@suse.de>
157 lines
5.1 KiB
C
157 lines
5.1 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2011 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef INTERFACE_H
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#define INTERFACE_H
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <limits.h>
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#include "config.h"
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#include "dhcp.h"
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#include "dhcpcd.h"
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#ifndef DUID_LEN
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# define DUID_LEN 128 + 2
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#endif
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#define EUI64_ADDR_LEN 8
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#define INFINIBAND_ADDR_LEN 20
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/* Linux 2.4 doesn't define this */
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#ifndef ARPHRD_IEEE1394
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# define ARPHRD_IEEE1394 24
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#endif
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/* The BSD's don't define this yet */
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#ifndef ARPHRD_INFINIBAND
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# define ARPHRD_INFINIBAND 32
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#endif
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/* Work out if we have a private address or not
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* 10/8
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* 172.16/12
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* 192.168/16
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*/
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#ifndef IN_PRIVATE
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# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \
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((addr & 0xfff00000) == 0xac100000) || \
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((addr & IN_CLASSB_NET) == 0xc0a80000))
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#endif
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#define LINKLOCAL_ADDR 0xa9fe0000
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#define LINKLOCAL_MASK IN_CLASSB_NET
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#define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK)
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#ifndef IN_LINKLOCAL
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# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
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#endif
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struct rt {
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struct in_addr dest;
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struct in_addr net;
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struct in_addr gate;
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const struct interface *iface;
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struct in_addr src;
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struct rt *next;
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};
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extern int socket_afnet;
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uint32_t get_netmask(uint32_t);
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char *hwaddr_ntoa(const unsigned char *, size_t);
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size_t hwaddr_aton(unsigned char *, const char *);
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int getifssid(const char *, char *);
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struct interface *init_interface(const char *);
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struct interface *discover_interfaces(int, char * const *);
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void free_interface(struct interface *);
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int do_mtu(const char *, short int);
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#define get_mtu(iface) do_mtu(iface, 0)
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#define set_mtu(iface, mtu) do_mtu(iface, mtu)
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int inet_ntocidr(struct in_addr);
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int inet_cidrtoaddr(int, struct in_addr *);
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int up_interface(struct interface *);
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int if_conf(struct interface *);
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int if_init(struct interface *);
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int do_address(const char *,
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struct in_addr *, struct in_addr *, struct in_addr *, int);
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int if_address(const struct interface *,
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const struct in_addr *, const struct in_addr *,
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const struct in_addr *, int);
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#define add_address(iface, addr, net, brd) \
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if_address(iface, addr, net, brd, 1)
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#define del_address(iface, addr, net) \
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if_address(iface, addr, net, NULL, -1)
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#define has_address(iface, addr, net) \
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do_address(iface, addr, net, NULL, 0)
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#define get_address(iface, addr, net, dst) \
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do_address(iface, addr, net, dst, 1)
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int if_route(const struct interface *, const struct in_addr *,
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const struct in_addr *, const struct in_addr *, int, int);
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#define add_route(iface, dest, mask, gate, metric) \
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if_route(iface, dest, mask, gate, metric, 1)
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#define change_route(iface, dest, mask, gate, metric) \
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if_route(iface, dest, mask, gate, metric, 0)
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#define del_route(iface, dest, mask, gate, metric) \
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if_route(iface, dest, mask, gate, metric, -1)
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#define del_src_route(iface, dest, mask, gate, metric) \
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if_route(iface, dest, mask, gate, metric, -2)
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void free_routes(struct rt *);
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int open_udp_socket(struct interface *);
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extern const size_t udp_dhcp_len;
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ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t,
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struct in_addr, struct in_addr);
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ssize_t get_udp_data(const uint8_t **, const uint8_t *);
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int valid_udp_packet(const uint8_t *, size_t, struct in_addr *, int);
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int open_socket(struct interface *, int);
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ssize_t send_packet(const struct interface *, struct in_addr,
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const uint8_t *, ssize_t);
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ssize_t send_raw_packet(const struct interface *, int,
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const void *, ssize_t);
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ssize_t get_raw_packet(struct interface *, int, void *, ssize_t, int *);
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int init_sockets(void);
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int open_link_socket(void);
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int manage_link(int);
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int carrier_status(struct interface *);
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#endif
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