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      1 /*
      2  * dhcpcd - DHCP client daemon
      3  * Copyright (c) 2006-2010 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 #ifndef DHCPCD_H
     29 #define DHCPCD_H
     30 
     31 #include <sys/socket.h>
     32 #include <net/if.h>
     33 
     34 #include <limits.h>
     35 
     36 #include "control.h"
     37 #include "dhcp.h"
     38 #include "if-options.h"
     39 
     40 #define HWADDR_LEN 20
     41 #define IF_SSIDSIZE 33
     42 #define PROFILE_LEN 64
     43 
     44 enum DHS {
     45 	DHS_INIT,
     46 	DHS_DISCOVER,
     47 	DHS_REQUEST,
     48 	DHS_BOUND,
     49 	DHS_RENEW,
     50 	DHS_REBIND,
     51 	DHS_REBOOT,
     52 	DHS_INFORM,
     53 	DHS_RENEW_REQUESTED,
     54 	DHS_INIT_IPV4LL,
     55 	DHS_PROBE
     56 };
     57 
     58 #define LINK_UP 	1
     59 #define LINK_UNKNOWN	0
     60 #define LINK_DOWN 	-1
     61 
     62 struct if_state {
     63 	enum DHS state;
     64 	char profile[PROFILE_LEN];
     65 	struct if_options *options;
     66 	struct dhcp_message *sent;
     67 	struct dhcp_message *offer;
     68 	struct dhcp_message *new;
     69 	struct dhcp_message *old;
     70 	struct dhcp_lease lease;
     71 	const char *reason;
     72 	time_t interval;
     73 	time_t nakoff;
     74 	uint32_t xid;
     75 	int socket;
     76 	int probes;
     77 	int claims;
     78 	int conflicts;
     79 	time_t defend;
     80 	struct in_addr fail;
     81 	size_t arping_index;
     82 };
     83 
     84 struct interface {
     85 	char name[IF_NAMESIZE];
     86 	struct if_state *state;
     87 
     88 	int flags;
     89 	sa_family_t family;
     90 	unsigned char hwaddr[HWADDR_LEN];
     91 	size_t hwlen;
     92 	int metric;
     93 	int carrier;
     94 	int wireless;
     95 	char ssid[IF_SSIDSIZE];
     96 
     97 	int raw_fd;
     98 	int udp_fd;
     99 	int arp_fd;
    100 	size_t buffer_size, buffer_len, buffer_pos;
    101 	unsigned char *buffer;
    102 
    103 	struct in_addr addr;
    104 	struct in_addr net;
    105 	struct in_addr dst;
    106 
    107 	char leasefile[PATH_MAX];
    108 	time_t start_uptime;
    109 
    110 	unsigned char *clientid;
    111 
    112 	struct interface *next;
    113 };
    114 
    115 extern int pidfd;
    116 extern int options;
    117 extern int ifac;
    118 extern char **ifav;
    119 extern int ifdc;
    120 extern char **ifdv;
    121 extern struct interface *ifaces;
    122 extern int avoid_routes;
    123 
    124 struct interface *find_interface(const char *);
    125 int handle_args(struct fd_list *, int, char **);
    126 void handle_interface(int, const char *);
    127 void handle_hwaddr(const char *, unsigned char *, size_t);
    128 void handle_ifa(int, const char *,
    129     struct in_addr *, struct in_addr *, struct in_addr *);
    130 void handle_exit_timeout(void *);
    131 void start_interface(void *);
    132 void start_discover(void *);
    133 void start_request(void *);
    134 void start_renew(void *);
    135 void start_rebind(void *);
    136 void start_reboot(struct interface *);
    137 void start_expire(void *);
    138 void send_decline(struct interface *);
    139 void open_sockets(struct interface *);
    140 void close_sockets(struct interface *);
    141 void drop_config(struct interface *, const char *);
    142 int select_profile(struct interface *, const char *);
    143 
    144 #endif
    145