/* * dhcpcd - DHCP client daemon * Copyright (c) 2006-2016 Roy Marples * 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 #include #include #include #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 ROUNDUP4(a) (1 + (((a) - 1) | 3)) #define ROUNDUP8(a) (1 + (((a) - 1) | 7)) #define USEC_PER_SEC 1000000L #define USEC_PER_NSEC 1000L #define NSEC_PER_SEC 1000000000L #define NSEC_PER_MSEC 1000000L #define MSEC_PER_SEC 1000L #define CSEC_PER_SEC 100L #define NSEC_PER_CSEC 10000000L /* 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 / NSEC_PER_MSEC; \ } 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)) \ * NSEC_PER_MSEC; \ } 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 __packed # define __packed __attribute__((__packed__)) # endif # ifndef __sysloglike # ifndef __syslog_attribute_ # define __syslog__ __printf__ # endif # define __sysloglike(a, b) __attribute__((format(__syslog__, a, b))) # endif # ifndef __unused # define __unused __attribute__((__unused__)) # endif #else # ifndef __packed # define __packed # endif # ifndef __sysloglike # define __sysloglike # endif # ifndef __unused # define __unused # endif #endif #ifndef __arraycount # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) #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); 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)) void logger(struct dhcpcd_ctx *, int, const char *, ...) __sysloglike(3, 4); 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); ssize_t addvar(struct dhcpcd_ctx *, char ***, const char *, const char *, const char *); ssize_t addvard(struct dhcpcd_ctx *, char ***, const char *, const char *, size_t); char *hwaddr_ntoa(const uint8_t *, size_t, char *, size_t); size_t hwaddr_aton(uint8_t *, const char *); size_t read_hwaddr_aton(uint8_t **, const char *); ssize_t recvmsg_realloc(int, struct msghdr *, int); #endif