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// SPDX-License-Identifier: MIT
/*
Copyright (c) 2007, 2008 by Juliusz Chroboczek
Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
*/
#ifndef BABEL_UTIL_H
#define BABEL_UTIL_H
#include "babeld.h"
#include "babel_main.h"
#include "log.h"
#include "memory.h"
DECLARE_MGROUP(BABELD);
#if defined(i386) || defined(__mc68020__) || defined(__x86_64__)
#define DO_NTOHS(_d, _s) do{ _d = ntohs(*(const unsigned short*)(_s)); }while(0)
#define DO_NTOHL(_d, _s) do{ _d = ntohl(*(const unsigned*)(_s)); } while(0)
#define DO_HTONS(_d, _s) do{ *(unsigned short*)(_d) = htons(_s); } while(0)
#define DO_HTONL(_d, _s) do{ *(unsigned*)(_d) = htonl(_s); } while(0)
/* Some versions of gcc seem to be buggy, and ignore the packed attribute.
Disable this code until the issue is clarified. */
/* #elif defined __GNUC__*/
#else
#define DO_NTOHS(_d, _s) \
do { short _dd; \
memcpy(&(_dd), (_s), 2); \
_d = ntohs(_dd); } while(0)
#define DO_NTOHL(_d, _s) \
do { int _dd; \
memcpy(&(_dd), (_s), 4); \
_d = ntohl(_dd); } while(0)
#define DO_HTONS(_d, _s) \
do { unsigned short _dd; \
_dd = htons(_s); \
memcpy((_d), &(_dd), 2); } while(0)
#define DO_HTONL(_d, _s) \
do { unsigned _dd; \
_dd = htonl(_s); \
memcpy((_d), &(_dd), 4); } while(0)
#endif
static inline int
seqno_compare(unsigned short s1, unsigned short s2)
{
if(s1 == s2)
return 0;
else
return ((s2 - s1) & 0x8000) ? 1 : -1;
}
static inline short
seqno_minus(unsigned short s1, unsigned short s2)
{
return (short)((s1 - s2) & 0xFFFF);
}
static inline unsigned short
seqno_plus(unsigned short s, int plus)
{
return ((s + plus) & 0xFFFF);
}
/* Returns a time in microseconds on 32 bits (thus modulo 2^32,
i.e. about 4295 seconds). */
static inline unsigned int
time_us(const struct timeval t)
{
return (unsigned int) (t.tv_sec * 1000000 + t.tv_usec);
}
int roughly(int value);
void timeval_minus(struct timeval *d,
const struct timeval *s1, const struct timeval *s2);
unsigned timeval_minus_msec(const struct timeval *s1, const struct timeval *s2)
ATTRIBUTE ((pure));
void timeval_add_msec(struct timeval *d, const struct timeval *s, int msecs);
void set_timeout (struct timeval *timeout, int msecs);
int timeval_compare(const struct timeval *s1, const struct timeval *s2)
ATTRIBUTE ((pure));
void timeval_min(struct timeval *d, const struct timeval *s);
void timeval_min_sec(struct timeval *d, time_t secs);
int parse_nat(const char *string) ATTRIBUTE ((pure));
int parse_msec(const char *string) ATTRIBUTE ((pure));
unsigned char *mask_prefix(unsigned char *restrict ret,
const unsigned char *restrict prefix,
unsigned char plen);
const char *format_address(const unsigned char *address);
const char *format_prefix(const unsigned char *address, unsigned char prefix);
const char *format_eui64(const unsigned char *eui);
const char *format_thousands(unsigned int value);
int parse_address(const char *address, unsigned char *addr_r, int *af_r);
int parse_eui64(const char *eui, unsigned char *eui_r);
int wait_for_fd(int direction, int fd, int msecs);
int martian_prefix(const unsigned char *prefix, int plen) ATTRIBUTE ((pure));
int linklocal(const unsigned char *address) ATTRIBUTE ((pure));
int v4mapped(const unsigned char *address) ATTRIBUTE ((pure));
void v4tov6(unsigned char *dst, const unsigned char *src);
void inaddr_to_uchar(unsigned char *dest, const struct in_addr *src);
void uchar_to_inaddr(struct in_addr *dest, const unsigned char *src);
void in6addr_to_uchar(unsigned char *dest, const struct in6_addr *src);
void uchar_to_in6addr(struct in6_addr *dest, const unsigned char *src);
int daemonise(void);
extern const unsigned char v4prefix[16];
static inline bool
is_default(const unsigned char *prefix, int plen)
{
return plen == 0 || (plen == 96 && v4mapped(prefix));
}
/* If debugging is disabled, we want to avoid calling format_address
for every omitted debugging message. So debug is a macro. But
vararg macros are not portable. */
#if defined NO_DEBUG
#define debugf(...) do {} while(0)
#else /* NO_DEBUG */
/* some levels */
#define BABEL_DEBUG_COMMON (1 << 0)
#define BABEL_DEBUG_KERNEL (1 << 1)
#define BABEL_DEBUG_FILTER (1 << 2)
#define BABEL_DEBUG_TIMEOUT (1 << 3)
#define BABEL_DEBUG_IF (1 << 4)
#define BABEL_DEBUG_ROUTE (1 << 5)
#define BABEL_DEBUG_ALL (0xFFFF)
#define debugf(level, ...) \
do { \
if (unlikely(debug & level)) \
zlog_debug(__VA_ARGS__); \
} while (0)
#endif /* NO_DEBUG */
#endif /* BABEL_UTIL_H */
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