/* SPDX-License-Identifier: BSD-2-Clause */ /* * dhcpcd - DHCP client daemon * Copyright (c) 2006-2019 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 #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 __unused # define __unused __attribute__((__unused__)) # endif #else # ifndef __packed # define __packed # endif # ifndef __unused # define __unused # endif #endif /* Needed for rbtree(3) compat */ #ifndef __RCSID #define __RCSID(a) #endif #ifndef __predict_false # if __GNUC__ > 2 # define __predict_true(exp) __builtin_expect((exp) != 0, 1) # define __predict_false(exp) __builtin_expect((exp) != 0, 0) #else # define __predict_true(exp) (exp) # define __predict_false(exp) (exp) # endif #endif #ifndef __BEGIN_DECLS # if defined(__cplusplus) # define __BEGIN_DECLS extern "C" { # define __END_DECLS }; # else /* __BEGIN_DECLS */ # define __BEGIN_DECLS # define __END_DECLS # endif /* __BEGIN_DECLS */ #endif /* __BEGIN_DECLS */ #ifndef __fallthrough # if __GNUC__ >= 7 # define __fallthrough __attribute__((fallthrough)) # else # define __fallthrough # endif #endif /* * Compile Time Assertion. */ #ifndef __CTASSERT # ifdef __COUNTER__ # define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__) # else # define __CTASSERT(x) __CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__) # define __CTASSERT99(x, a, b) __CTASSERT0(x, __CONCAT(__ctassert,a), \ __CONCAT(_,b)) # endif # define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z) # define __CTASSERT1(x, y, z) typedef char y ## z[/*CONSTCOND*/(x) ? 1 : -1] __unused #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 *); const char *hwaddr_ntoa(const void *, size_t, char *, size_t); size_t hwaddr_aton(uint8_t *, const char *); size_t read_hwaddr_aton(uint8_t **, const char *); int is_root_local(void); #endif