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contrib/dhcpcd/src/dhcpcd.h

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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2021 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.
*/
#ifndef DHCPCD_H
#define DHCPCD_H
#include <sys/socket.h>
#include <net/if.h>
#include <stdio.h>
#include "config.h"
#ifdef HAVE_SYS_QUEUE_H
#include <sys/queue.h>
#endif
#include "defs.h"
#include "control.h"
#include "if-options.h"
#define HWADDR_LEN 20
#define IF_SSIDLEN 32
#define PROFILE_LEN 64
#define SECRET_LEN 64
#define IF_INACTIVE 0
#define IF_ACTIVE 1
#define IF_ACTIVE_USER 2
#define LINK_UP 1
#define LINK_UNKNOWN 0
#define LINK_DOWN -1
#define IF_DATA_IPV4 0
#define IF_DATA_ARP 1
#define IF_DATA_IPV4LL 2
#define IF_DATA_DHCP 3
#define IF_DATA_IPV6 4
#define IF_DATA_IPV6ND 5
#define IF_DATA_DHCP6 6
#define IF_DATA_MAX 7
#ifdef __QNX__
/* QNX carries defines for, but does not actually support PF_LINK */
#undef IFLR_ACTIVE
#endif
struct interface {
struct dhcpcd_ctx *ctx;
TAILQ_ENTRY(interface) next;
char name[IF_NAMESIZE];
unsigned int index;
unsigned int active;
unsigned int flags;
uint16_t hwtype; /* ARPHRD_ETHER for example */
unsigned char hwaddr[HWADDR_LEN];
uint8_t hwlen;
unsigned short vlanid;
unsigned int metric;
int carrier;
bool wireless;
uint8_t ssid[IF_SSIDLEN];
unsigned int ssid_len;
char profile[PROFILE_LEN];
struct if_options *options;
void *if_data[IF_DATA_MAX];
};
TAILQ_HEAD(if_head, interface);
#include "privsep.h"
/* dhcpcd requires CMSG_SPACE to evaluate to a compile time constant. */
#if defined(__QNX) || \
(defined(__NetBSD_Version__) && __NetBSD_Version__ < 600000000)
#undef CMSG_SPACE
#endif
#ifndef ALIGNBYTES
#define ALIGNBYTES (sizeof(int) - 1)
#endif
#ifndef ALIGN
#define ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
#endif
#ifndef CMSG_SPACE
#define CMSG_SPACE(len) (ALIGN(sizeof(struct cmsghdr)) + ALIGN(len))
#endif
struct passwd;
struct dhcpcd_ctx {
char pidfile[sizeof(PIDFILE) + IF_NAMESIZE + 1];
char vendor[256];
bool stdin_valid; /* It's possible stdin, stdout and stderr */
bool stdout_valid; /* could be closed when dhcpcd starts. */
bool stderr_valid;
int stderr_fd; /* FD for logging to stderr */
int fork_fd; /* FD for the fork init signal pipe */
const char *cffile;
unsigned long long options;
char *logfile;
int argc;
char **argv;
int ifac; /* allowed interfaces */
char **ifav; /* allowed interfaces */
int ifdc; /* denied interfaces */
char **ifdv; /* denied interfaces */
int ifc; /* listed interfaces */
char **ifv; /* listed interfaces */
int ifcc; /* configured interfaces */
char **ifcv; /* configured interfaces */
uint8_t duid_type;
unsigned char *duid;
size_t duid_len;
struct if_head *ifaces;
char *ctl_buf;
size_t ctl_buflen;
size_t ctl_bufpos;
size_t ctl_extra;
rb_tree_t routes; /* our routes */
#ifdef RT_FREE_ROUTE_TABLE
rb_tree_t froutes; /* free routes for re-use */
#endif
size_t rt_order; /* route order storage */
int pf_inet_fd;
#ifdef PF_LINK
int pf_link_fd;
#endif
void *priv;
int link_fd;
#ifndef SMALL
int link_rcvbuf;
#endif
int seq; /* route message sequence no */
int sseq; /* successful seq no sent */
#ifdef USE_SIGNALS
sigset_t sigset;
#endif
struct eloop *eloop;
char *script;
#ifdef HAVE_OPEN_MEMSTREAM
FILE *script_fp;
#endif
char *script_buf;
size_t script_buflen;
char **script_env;
size_t script_envlen;
int control_fd;
int control_unpriv_fd;
struct fd_list_head control_fds;
char control_sock[sizeof(CONTROLSOCKET) + IF_NAMESIZE];
char control_sock_unpriv[sizeof(CONTROLSOCKET) + IF_NAMESIZE + 7];
gid_t control_group;
/* DHCP Enterprise options, RFC3925 */
struct dhcp_opt *vivso;
size_t vivso_len;
char *randomstate; /* original state */
/* For filtering RTM_MISS messages per router */
#ifdef BSD
uint8_t *rt_missfilter;
size_t rt_missfilterlen;
size_t rt_missfiltersize;
#endif
#ifdef PRIVSEP
struct passwd *ps_user; /* struct passwd for privsep user */
pid_t ps_root_pid;
int ps_root_fd; /* Privileged Proxy commands */
int ps_log_fd; /* chroot logging */
int ps_data_fd; /* Data from root spawned processes */
struct eloop *ps_eloop; /* eloop for polling root data */
struct ps_process_head ps_processes; /* List of spawned processes */
pid_t ps_inet_pid;
int ps_inet_fd; /* Network Proxy commands and data */
pid_t ps_control_pid;
int ps_control_fd; /* Control Proxy - generic listener */
int ps_control_data_fd; /* Control Proxy - data query */
struct fd_list *ps_control; /* Queue for the above */
struct fd_list *ps_control_client; /* Queue for the above */
#endif
#ifdef INET
struct dhcp_opt *dhcp_opts;
size_t dhcp_opts_len;
int udp_rfd;
int udp_wfd;
/* Our aggregate option buffer.
* We ONLY use this when options are split, which for most purposes is
* practically never. See RFC3396 for details. */
uint8_t *opt_buffer;
size_t opt_buffer_len;
#endif
#ifdef INET6
uint8_t *secret;
size_t secret_len;
#ifndef __sun
int nd_fd;
#endif
struct ra_head *ra_routers;
struct dhcp_opt *nd_opts;
size_t nd_opts_len;
#ifdef DHCP6
int dhcp6_rfd;
int dhcp6_wfd;
struct dhcp_opt *dhcp6_opts;
size_t dhcp6_opts_len;
#endif
#ifndef __linux__
int ra_global;
#endif
#endif /* INET6 */
#ifdef PLUGIN_DEV
char *dev_load;
int dev_fd;
struct dev *dev;
void *dev_handle;
#endif
};
#ifdef USE_SIGNALS
extern const int dhcpcd_signals[];
extern const size_t dhcpcd_signals_len;
extern const int dhcpcd_signals_ignore[];
extern const size_t dhcpcd_signals_ignore_len;
#endif
extern const char *dhcpcd_default_script;
int dhcpcd_ifafwaiting(const struct interface *);
int dhcpcd_afwaiting(const struct dhcpcd_ctx *);
void dhcpcd_daemonise(struct dhcpcd_ctx *);
void dhcpcd_linkoverflow(struct dhcpcd_ctx *);
int dhcpcd_handleargs(struct dhcpcd_ctx *, struct fd_list *, int, char **);
void dhcpcd_handlecarrier(struct interface *, int, unsigned int);
int dhcpcd_handleinterface(void *, int, const char *);
void dhcpcd_handlehwaddr(struct interface *, uint16_t, const void *, uint8_t);
void dhcpcd_dropinterface(struct interface *, const char *);
int dhcpcd_selectprofile(struct interface *, const char *);
void dhcpcd_startinterface(void *);
void dhcpcd_activateinterface(struct interface *, unsigned long long);
#endif