ndhc/src/ndhc.h

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/* ndhc.h - DHCP client
*
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* Copyright (c) 2014-2015 Nicholas J. Kain <njkain at gmail dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 NJK_NDHC_NDHC_H_
#define NJK_NDHC_NDHC_H_
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#include <stdint.h>
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#include <limits.h>
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#include <net/if.h>
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#include "nk/random.h"
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struct client_state_t {
unsigned long long leaseStartTime;
int dhcpState;
int arpPrevState;
int ifsPrevState;
int ifDeconfig; // Set if the interface has already been deconfigured.
int epollFd, signalFd, listenFd, arpFd, nlFd, rfkillFd;
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int nlPortId;
uint32_t clientAddr, serverAddr, srcAddr, routerAddr;
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uint32_t lease, renewTime, rebindTime, xid;
struct nk_random_state_u32 rnd32_state;
uint8_t routerArp[6], serverArp[6];
uint8_t using_dhcp_bpf, init, got_router_arp, got_server_arp;
uint8_t rfkill_set;
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};
struct client_config_t {
char foreground; // Do not fork
char quit_after_lease; // Quit after obtaining lease
char abort_if_no_lease; // Abort if no lease
char background_if_no_lease; // Fork to background if no lease
char enable_rfkill; // Listen for rfkill events
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char interface[IFNAMSIZ]; // The name of the interface to use
char clientid[64]; // Optional client id to use
uint8_t clientid_len; // Length of the clientid
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char hostname[64]; // Optional hostname to use
char vendor[64]; // Vendor identification that will be sent
int metric; // Metric for the default route
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int ifindex; // Index number of the interface to use
uint32_t rfkillIdx; // Index of the corresponding rfkill device
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uint8_t arp[6]; // Our arp address
};
extern struct client_config_t client_config;
extern int ifchSock[2];
extern int ifchStream[2];
extern int sockdSock[2];
extern int sockdStream[2];
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extern char state_dir[PATH_MAX];
extern char chroot_dir[PATH_MAX];
extern char resolv_conf_d[PATH_MAX];
extern char pidfile[PATH_MAX];
extern uid_t ndhc_uid;
extern gid_t ndhc_gid;
void set_client_addr(const char v[static 1]);
void show_usage(void);
int get_clientid_string(const char str[static 1], size_t slen);
void background(void);
void print_version(void);
#endif /* NJK_NDHC_NDHC_H_ */