mirror of
https://github.com/rsmarples/dhcpcd.git
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199 lines
7.1 KiB
C
199 lines
7.1 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2016 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef COMMON_H
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#define COMMON_H
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#include <sys/param.h>
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#include <sys/time.h>
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#include <stdio.h>
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#include <syslog.h>
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#include "config.h"
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#include "defs.h"
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#include "dhcpcd.h"
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#ifndef HOSTNAME_MAX_LEN
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#define HOSTNAME_MAX_LEN 250 /* 255 - 3 (FQDN) - 2 (DNS enc) */
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#endif
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#ifndef MIN
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#define MIN(a,b) ((/*CONSTCOND*/(a)<(b))?(a):(b))
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#define MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b))
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#endif
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#define UNCONST(a) ((void *)(unsigned long)(const void *)(a))
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#define STRINGIFY(a) #a
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#define TOSTRING(a) STRINGIFY(a)
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#define UNUSED(a) (void)(a)
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#define ROUNDUP4(a) (1 + (((a) - 1) | 3))
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#define ROUNDUP8(a) (1 + (((a) - 1) | 7))
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#define USEC_PER_SEC 1000000L
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#define USEC_PER_NSEC 1000L
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#define NSEC_PER_SEC 1000000000L
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#define NSEC_PER_MSEC 1000000L
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#define MSEC_PER_SEC 1000L
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#define CSEC_PER_SEC 100L
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#define NSEC_PER_CSEC 10000000L
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/* Some systems don't define timespec macros */
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#ifndef timespecclear
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#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
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#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
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#define timespeccmp(tsp, usp, cmp) \
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(((tsp)->tv_sec == (usp)->tv_sec) ? \
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((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
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((tsp)->tv_sec cmp (usp)->tv_sec))
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#define timespecadd(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
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if ((vsp)->tv_nsec >= 1000000000L) { \
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(vsp)->tv_sec++; \
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(vsp)->tv_nsec -= 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#endif
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#define timespec_to_double(tv) \
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((double)(tv)->tv_sec + (double)((tv)->tv_nsec) / 1000000000.0)
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#define timespecnorm(tv) do { \
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while ((tv)->tv_nsec >= NSEC_PER_SEC) { \
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(tv)->tv_sec++; \
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(tv)->tv_nsec -= NSEC_PER_SEC; \
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} \
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} while (0 /* CONSTCOND */);
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#define ts_to_ms(ms, tv) do { \
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ms = (tv)->tv_sec * MSEC_PER_SEC; \
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ms += (tv)->tv_nsec / NSEC_PER_MSEC; \
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} while (0 /* CONSTCOND */);
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#define ms_to_ts(tv, ms) do { \
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(tv)->tv_sec = ms / MSEC_PER_SEC; \
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(tv)->tv_nsec = (suseconds_t)(ms - ((tv)->tv_sec * MSEC_PER_SEC)) \
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* NSEC_PER_MSEC; \
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} while (0 /* CONSTCOND */);
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#ifndef TIMEVAL_TO_TIMESPEC
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#define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
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(ts)->tv_sec = (tv)->tv_sec; \
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(ts)->tv_nsec = (tv)->tv_usec * USEC_PER_NSEC; \
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} while (0 /* CONSTCOND */)
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#endif
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#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
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# ifndef __packed
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# define __packed __attribute__((__packed__))
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# endif
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# ifndef __sysloglike
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# ifndef __syslog_attribute_
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# define __syslog__ __printf__
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# endif
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# define __sysloglike(a, b) __attribute__((format(__syslog__, a, b)))
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# endif
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# ifndef __unused
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# define __unused __attribute__((__unused__))
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# endif
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#else
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# ifndef __packed
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# define __packed
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# endif
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# ifndef __sysloglike
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# define __sysloglike
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# endif
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# ifndef __unused
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# define __unused
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# endif
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#endif
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#ifndef __arraycount
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# define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
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#endif
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/* We don't really need this as our supported systems define __restrict
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* automatically for us, but it is here for completeness. */
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#ifndef __restrict
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# if defined(__lint__)
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# define __restrict
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# elif __STDC_VERSION__ >= 199901L
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# define __restrict restrict
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# elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__))
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# define __restrict
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# endif
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#endif
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void get_line_free(void);
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extern int clock_monotonic;
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int get_monotonic(struct timespec *);
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/* We could shave a few k off the binary size by just using the
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* syslog(3) interface.
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* However, this results in a ugly output on the command line
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* and relies on syslogd(8) starting before dhcpcd which is not
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* always the case. */
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#ifndef USE_LOGFILE
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# define USE_LOGFILE 1
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#endif
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#if USE_LOGFILE
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void logger_open(struct dhcpcd_ctx *);
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#define logger_mask(ctx, lvl) setlogmask((lvl))
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void logger(struct dhcpcd_ctx *, int, const char *, ...) __sysloglike(3, 4);
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void logger_close(struct dhcpcd_ctx *);
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#else
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#define logger_open(ctx) openlog(PACKAGE, LOG_PERROR | LOG_PID, LOG_DAEMON)
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#define logger_mask(ctx, lvl) setlogmask((lvl))
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#define logger(ctx, pri, fmt, ...) \
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do { \
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UNUSED((ctx)); \
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syslog((pri), (fmt), ##__VA_ARGS__); \
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} while (0 /*CONSTCOND */)
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#define logger_close(ctx) closelog()
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#endif
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ssize_t setvar(struct dhcpcd_ctx *,
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char **, const char *, const char *, const char *);
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ssize_t setvard(struct dhcpcd_ctx *,
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char **, const char *, const char *, size_t);
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ssize_t addvar(struct dhcpcd_ctx *,
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char ***, const char *, const char *, const char *);
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ssize_t addvard(struct dhcpcd_ctx *,
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char ***, const char *, const char *, size_t);
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char *hwaddr_ntoa(const unsigned char *, size_t, char *, size_t);
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size_t hwaddr_aton(unsigned char *, const char *);
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#endif
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