1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - DHCP client daemon
4 * Copyright (c) 2006-2020 Roy Marples <roy@marples.name>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/socket.h>
38 #ifdef HAVE_SYS_QUEUE_H
39 #include <sys/queue.h>
44 #include "if-options.h"
48 #define PROFILE_LEN 64
53 #define IF_ACTIVE_USER 2
56 #define LINK_UNKNOWN 0
58 #define LINK_DOWN_IFFUP -2
60 #define IF_DATA_IPV4 0
62 #define IF_DATA_IPV4LL 2
63 #define IF_DATA_DHCP 3
64 #define IF_DATA_IPV6 4
65 #define IF_DATA_IPV6ND 5
66 #define IF_DATA_DHCP6 6
70 /* QNX carries defines for, but does not actually support PF_LINK */
75 struct dhcpcd_ctx *ctx;
76 TAILQ_ENTRY(interface) next;
77 char name[IF_NAMESIZE];
81 uint16_t hwtype; /* ARPHRD_ETHER for example */
82 unsigned char hwaddr[HWADDR_LEN];
84 unsigned short vlanid;
88 uint8_t ssid[IF_SSIDLEN];
89 unsigned int ssid_len;
91 char profile[PROFILE_LEN];
92 struct if_options *options;
93 void *if_data[IF_DATA_MAX];
95 TAILQ_HEAD(if_head, interface);
99 /* dhcpcd requires CMSG_SPACE to evaluate to a compile time constant. */
100 #if defined(__QNX) || \
101 (defined(__NetBSD_Version__) && __NetBSD_Version__ < 600000000)
106 #define ALIGNBYTES (sizeof(int) - 1)
109 #define ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
112 #define CMSG_SPACE(len) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(len))
118 char pidfile[sizeof(PIDFILE) + IF_NAMESIZE + 1];
120 int fork_fd; /* FD for the fork init signal pipe */
121 int stderr_fd; /* FD for logging to stderr */
123 unsigned long long options;
127 int ifac; /* allowed interfaces */
128 char **ifav; /* allowed interfaces */
129 int ifdc; /* denied interfaces */
130 char **ifdv; /* denied interfaces */
131 int ifc; /* listed interfaces */
132 char **ifv; /* listed interfaces */
133 int ifcc; /* configured interfaces */
134 char **ifcv; /* configured interfaces */
137 struct if_head *ifaces;
144 rb_tree_t routes; /* our routes */
145 #ifdef RT_FREE_ROUTE_TABLE
146 rb_tree_t froutes; /* free routes for re-use */
148 size_t rt_order; /* route order storage */
159 int seq; /* route message sequence no */
160 int sseq; /* successful seq no sent */
168 #ifdef HAVE_OPEN_MEMSTREAM
172 size_t script_buflen;
174 size_t script_envlen;
177 int control_unpriv_fd;
178 struct fd_list_head control_fds;
179 char control_sock[sizeof(CONTROLSOCKET) + IF_NAMESIZE];
182 /* DHCP Enterprise options, RFC3925 */
183 struct dhcp_opt *vivso;
186 char *randomstate; /* original state */
188 /* For filtering RTM_MISS messages per router */
190 uint8_t *rt_missfilter;
191 size_t rt_missfilterlen;
192 size_t rt_missfiltersize;
196 struct passwd *ps_user; /* struct passwd for privsep user */
198 int ps_root_fd; /* Privileged Actioneer commands */
199 int ps_data_fd; /* Data from root spawned processes */
200 struct eloop *ps_eloop; /* eloop for polling root data */
201 struct ps_process_head ps_processes; /* List of spawned processes */
203 int ps_inet_fd; /* Network Proxy commands and data */
204 pid_t ps_control_pid;
205 int ps_control_fd; /* Control Proxy - generic listener */
206 int ps_control_data_fd; /* Control Proxy - data query */
207 struct fd_list *ps_control; /* Queue for the above */
208 struct fd_list *ps_control_client; /* Queue for the above */
212 struct dhcp_opt *dhcp_opts;
213 size_t dhcp_opts_len;
218 /* Our aggregate option buffer.
219 * We ONLY use this when options are split, which for most purposes is
220 * practically never. See RFC3396 for details. */
222 size_t opt_buffer_len;
231 struct ra_head *ra_routers;
233 struct dhcp_opt *nd_opts;
238 struct dhcp_opt *dhcp6_opts;
239 size_t dhcp6_opts_len;
256 extern const int dhcpcd_signals[];
257 extern const size_t dhcpcd_signals_len;
258 extern const int dhcpcd_signals_ignore[];
259 extern const size_t dhcpcd_signals_ignore_len;
262 extern const char *dhcpcd_default_script;
264 int dhcpcd_ifafwaiting(const struct interface *);
265 int dhcpcd_afwaiting(const struct dhcpcd_ctx *);
266 void dhcpcd_daemonise(struct dhcpcd_ctx *);
268 void dhcpcd_linkoverflow(struct dhcpcd_ctx *);
269 int dhcpcd_handleargs(struct dhcpcd_ctx *, struct fd_list *, int, char **);
270 void dhcpcd_handlecarrier(struct dhcpcd_ctx *, int, unsigned int, const char *);
271 int dhcpcd_handleinterface(void *, int, const char *);
272 void dhcpcd_handlehwaddr(struct interface *, uint16_t, const void *, uint8_t);
273 void dhcpcd_dropinterface(struct interface *, const char *);
274 int dhcpcd_selectprofile(struct interface *, const char *);
276 void dhcpcd_startinterface(void *);
277 void dhcpcd_activateinterface(struct interface *, unsigned long long);