| /* |
| * dhcpcd - DHCP client daemon |
| * Copyright (c) 2006-2015 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 COMMON_H |
| #define COMMON_H |
| |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <stdio.h> |
| #include <syslog.h> |
| |
| #include "config.h" |
| #include "defs.h" |
| #include "dhcpcd.h" |
| |
| #ifndef HOSTNAME_MAX_LEN |
| #define HOSTNAME_MAX_LEN 250 /* 255 - 3 (FQDN) - 2 (DNS enc) */ |
| #endif |
| |
| #ifndef MIN |
| #define MIN(a,b) ((/*CONSTCOND*/(a)<(b))?(a):(b)) |
| #define MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b)) |
| #endif |
| |
| #define UNCONST(a) ((void *)(unsigned long)(const void *)(a)) |
| #define STRINGIFY(a) #a |
| #define TOSTRING(a) STRINGIFY(a) |
| #define UNUSED(a) (void)(a) |
| |
| #define USEC_PER_SEC 1000000L |
| #define USEC_PER_NSEC 1000L |
| #define NSEC_PER_SEC 1000000000L |
| #define MSEC_PER_SEC 1000L |
| #define MSEC_PER_NSEC 1000000L |
| |
| /* Some systems don't define timespec macros */ |
| #ifndef timespecclear |
| #define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L) |
| #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec) |
| #define timespeccmp(tsp, usp, cmp) \ |
| (((tsp)->tv_sec == (usp)->tv_sec) ? \ |
| ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \ |
| ((tsp)->tv_sec cmp (usp)->tv_sec)) |
| #define timespecadd(tsp, usp, vsp) \ |
| do { \ |
| (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ |
| (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ |
| if ((vsp)->tv_nsec >= 1000000000L) { \ |
| (vsp)->tv_sec++; \ |
| (vsp)->tv_nsec -= 1000000000L; \ |
| } \ |
| } while (/* CONSTCOND */ 0) |
| #define timespecsub(tsp, usp, vsp) \ |
| do { \ |
| (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ |
| (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ |
| if ((vsp)->tv_nsec < 0) { \ |
| (vsp)->tv_sec--; \ |
| (vsp)->tv_nsec += 1000000000L; \ |
| } \ |
| } while (/* CONSTCOND */ 0) |
| #endif |
| |
| #define timespec_to_double(tv) \ |
| ((double)(tv)->tv_sec + (double)((tv)->tv_nsec) / 1000000000.0) |
| #define timespecnorm(tv) do { \ |
| while ((tv)->tv_nsec >= NSEC_PER_SEC) { \ |
| (tv)->tv_sec++; \ |
| (tv)->tv_nsec -= NSEC_PER_SEC; \ |
| } \ |
| } while (0 /* CONSTCOND */); |
| #define ts_to_ms(ms, tv) do { \ |
| ms = (tv)->tv_sec * MSEC_PER_SEC; \ |
| ms += (tv)->tv_nsec / MSEC_PER_NSEC; \ |
| } while (0 /* CONSTCOND */); |
| #define ms_to_ts(tv, ms) do { \ |
| (tv)->tv_sec = ms / MSEC_PER_SEC; \ |
| (tv)->tv_nsec = (suseconds_t)(ms - ((tv)->tv_sec * MSEC_PER_SEC)) \ |
| * MSEC_PER_NSEC; \ |
| } while (0 /* CONSTCOND */); |
| |
| #ifndef TIMEVAL_TO_TIMESPEC |
| #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \ |
| (ts)->tv_sec = (tv)->tv_sec; \ |
| (ts)->tv_nsec = (tv)->tv_usec * USEC_PER_NSEC; \ |
| } while (0 /* CONSTCOND */) |
| #endif |
| |
| #if __GNUC__ > 2 || defined(__INTEL_COMPILER) |
| # ifndef __dead |
| # define __dead __attribute__((__noreturn__)) |
| # endif |
| # ifndef __packed |
| # define __packed __attribute__((__packed__)) |
| # endif |
| # ifndef __printflike |
| # define __printflike(a, b) __attribute__((format(printf, a, b))) |
| # endif |
| # ifndef __unused |
| # define __unused __attribute__((__unused__)) |
| # endif |
| #else |
| # ifndef __dead |
| # define __dead |
| # endif |
| # ifndef __packed |
| # define __packed |
| # endif |
| # ifndef __printflike |
| # define __printflike |
| # endif |
| # ifndef __unused |
| # define __unused |
| # endif |
| #endif |
| |
| /* We don't really need this as our supported systems define __restrict |
| * automatically for us, but it is here for completeness. */ |
| #ifndef __restrict |
| # if defined(__lint__) |
| # define __restrict |
| # elif __STDC_VERSION__ >= 199901L |
| # define __restrict restrict |
| # elif !(2 < __GNUC__ || (2 == __GNU_C && 95 <= __GNUC_VERSION__)) |
| # define __restrict |
| # endif |
| #endif |
| |
| void get_line_free(void); |
| const char *get_hostname(char *, size_t, int); |
| extern int clock_monotonic; |
| int get_monotonic(struct timespec *); |
| |
| /* We could shave a few k off the binary size by just using the |
| * syslog(3) interface. |
| * However, this results in a ugly output on the command line |
| * and relies on syslogd(8) starting before dhcpcd which is not |
| * always the case. */ |
| #ifndef USE_LOGFILE |
| # define USE_LOGFILE 1 |
| #endif |
| #if USE_LOGFILE |
| void logger_open(struct dhcpcd_ctx *); |
| #define logger_mask(ctx, lvl) setlogmask((lvl)) |
| __printflike(3, 4) void logger(struct dhcpcd_ctx *, int, const char *, ...); |
| void logger_close(struct dhcpcd_ctx *); |
| #else |
| #define logger_open(ctx) openlog(PACKAGE, LOG_PERROR | LOG_PID, LOG_DAEMON) |
| #define logger_mask(ctx, lvl) setlogmask((lvl)) |
| #define logger(ctx, pri, fmt, ...) \ |
| do { \ |
| UNUSED((ctx)); \ |
| syslog((pri), (fmt), ##__VA_ARGS__); \ |
| } while (0 /*CONSTCOND */) |
| #define logger_close(ctx) closelog() |
| #endif |
| |
| ssize_t setvar(struct dhcpcd_ctx *, |
| char ***, const char *, const char *, const char *); |
| ssize_t setvard(struct dhcpcd_ctx *, |
| char ***, const char *, const char *, size_t); |
| time_t uptime(void); |
| |
| char *hwaddr_ntoa(const unsigned char *, size_t, char *, size_t); |
| size_t hwaddr_aton(unsigned char *, const char *); |
| #endif |
