1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2011 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#ifndef DHCPCD_H
29#define DHCPCD_H
30
31#include <sys/socket.h>
32#include <net/if.h>
33#include <netinet/in.h>
34
35#include <limits.h>
36
37#include "control.h"
38#include "dhcp.h"
39#include "if-options.h"
40
41#define HWADDR_LEN 20
42#define IF_SSIDSIZE 33
43#define PROFILE_LEN 64
44
45enum DHS {
46	DHS_INIT,
47	DHS_DISCOVER,
48	DHS_REQUEST,
49	DHS_BOUND,
50	DHS_RENEW,
51	DHS_REBIND,
52	DHS_REBOOT,
53	DHS_INFORM,
54	DHS_RENEW_REQUESTED,
55	DHS_INIT_IPV4LL,
56	DHS_PROBE
57};
58
59#define LINK_UP 	1
60#define LINK_UNKNOWN	0
61#define LINK_DOWN 	-1
62
63struct if_state {
64	enum DHS state;
65	char profile[PROFILE_LEN];
66	struct if_options *options;
67	struct dhcp_message *sent;
68	struct dhcp_message *offer;
69	struct dhcp_message *new;
70	struct dhcp_message *old;
71	struct dhcp_lease lease;
72	const char *reason;
73	time_t interval;
74	time_t nakoff;
75	uint32_t xid;
76	int socket;
77	int probes;
78	int claims;
79	int conflicts;
80	time_t defend;
81	struct in_addr fail;
82	size_t arping_index;
83};
84
85struct ra_opt {
86	uint8_t type;
87	struct timeval expire;
88	char *option;
89	struct ra_opt *next;
90};
91
92struct ra {
93	struct in6_addr from;
94	char sfrom[INET6_ADDRSTRLEN];
95	unsigned char *data;
96	ssize_t data_len;
97	struct timeval received;
98	uint32_t lifetime;
99	struct in6_addr prefix;
100	int prefix_len;
101	uint32_t prefix_vltime;
102	uint32_t prefix_pltime;
103	char sprefix[INET6_ADDRSTRLEN];
104	struct ra_opt *options;
105	int expired;
106	struct ra *next;
107};
108
109struct interface {
110	char name[IF_NAMESIZE];
111	struct if_state *state;
112
113	int flags;
114	sa_family_t family;
115	unsigned char hwaddr[HWADDR_LEN];
116	size_t hwlen;
117	int metric;
118	int carrier;
119	int wireless;
120	char ssid[IF_SSIDSIZE];
121
122	int raw_fd;
123	int udp_fd;
124	int arp_fd;
125	size_t buffer_size, buffer_len, buffer_pos;
126	unsigned char *buffer;
127
128	struct in_addr addr;
129	struct in_addr net;
130	struct in_addr dst;
131
132	char leasefile[PATH_MAX];
133	time_t start_uptime;
134
135	unsigned char *clientid;
136
137	unsigned char *rs;
138	size_t rslen;
139	int rsprobes;
140	struct ra *ras;
141
142	struct interface *next;
143};
144
145extern int pidfd;
146extern unsigned long long options;
147extern int ifac;
148extern char **ifav;
149extern int ifdc;
150extern char **ifdv;
151extern struct interface *ifaces;
152extern int avoid_routes;
153
154struct interface *find_interface(const char *);
155int handle_args(struct fd_list *, int, char **);
156void handle_carrier(int, int, const char *);
157void handle_interface(int, const char *);
158void handle_hwaddr(const char *, unsigned char *, size_t);
159void handle_ifa(int, const char *,
160    struct in_addr *, struct in_addr *, struct in_addr *);
161void handle_exit_timeout(void *);
162void start_interface(void *);
163void start_discover(void *);
164void start_request(void *);
165void start_renew(void *);
166void start_rebind(void *);
167void start_reboot(struct interface *);
168void start_expire(void *);
169void send_decline(struct interface *);
170void open_sockets(struct interface *);
171void close_sockets(struct interface *);
172void drop_dhcp(struct interface *, const char *);
173void drop_interface(struct interface *, const char *);
174int select_profile(struct interface *, const char *);
175
176#endif
177