320 lines
8.1 KiB
C
320 lines
8.1 KiB
C
/* helpers.h - Various helper functions
|
|
|
|
Copyright (C) 2000, 2001 Thomas Moestl
|
|
Copyright (C) 2002, 2003, 2004, 2007, 2009, 2011 Paul A. Rombouts
|
|
|
|
This file is part of the pdnsd package.
|
|
|
|
pdnsd is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
pdnsd is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with pdnsd; see the file COPYING. If not, see
|
|
<http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
|
|
#ifndef HELPERS_H
|
|
#define HELPERS_H
|
|
|
|
#include <config.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "cache.h"
|
|
#include "pdnsd_assert.h"
|
|
|
|
#define SOFTLOCK_MAXTRIES 1000
|
|
|
|
int run_as(const char *user);
|
|
void pdnsd_exit(void);
|
|
int softlock_mutex(pthread_mutex_t *mutex);
|
|
|
|
#if 0
|
|
inline static int isdchar (unsigned char c)
|
|
{
|
|
return ((c>='a' && c<='z') || (c>='A' && c<='Z') || (c>='0' && c<='9') || c=='-'
|
|
#ifdef UNDERSCORE
|
|
|| c=='_'
|
|
#endif
|
|
);
|
|
}
|
|
#endif
|
|
|
|
const unsigned char *rhn2str(const unsigned char *rhn, unsigned char *str, unsigned int size);
|
|
int str2rhn(const unsigned char *str, unsigned char *rhn);
|
|
const char *parsestr2rhn(const unsigned char *str, unsigned int len, unsigned char *rhn);
|
|
|
|
/* Note added by Paul Rombouts:
|
|
Compared to the definition used by Thomas Moestl (strlen(rhn)+1), the following definition of rhnlen
|
|
may yield a different result in certain error situations (when a domain name segment contains a null byte).
|
|
*/
|
|
inline static unsigned int rhnlen(const unsigned char *rhn)
|
|
__attribute__((always_inline));
|
|
inline static unsigned int rhnlen(const unsigned char *rhn)
|
|
{
|
|
unsigned int i=0,lb;
|
|
|
|
while((lb=rhn[i++]))
|
|
i+=lb;
|
|
return i;
|
|
}
|
|
|
|
/* Skip k segments in a name in length-byte string notation. */
|
|
inline static const unsigned char *skipsegs(const unsigned char *nm, unsigned k)
|
|
__attribute__((always_inline));
|
|
inline static const unsigned char *skipsegs(const unsigned char *nm, unsigned k)
|
|
{
|
|
unsigned lb;
|
|
for(;k && (lb= *nm); --k) {
|
|
nm += lb+1;
|
|
}
|
|
return nm;
|
|
}
|
|
|
|
/* Skip a name in length-byte string notation and return a pointer to the
|
|
position right after the terminating null byte.
|
|
*/
|
|
inline static unsigned char *skiprhn(unsigned char *rhn)
|
|
__attribute__((always_inline));
|
|
inline static unsigned char *skiprhn(unsigned char *rhn)
|
|
{
|
|
unsigned lb;
|
|
|
|
while((lb= *rhn++))
|
|
rhn += lb;
|
|
return rhn;
|
|
}
|
|
|
|
/* count the number of name segments of a name in length-byte string notation. */
|
|
inline static unsigned int rhnsegcnt(const unsigned char *rhn)
|
|
__attribute__((always_inline));
|
|
inline static unsigned int rhnsegcnt(const unsigned char *rhn)
|
|
{
|
|
unsigned int res=0,lb;
|
|
|
|
while((lb= *rhn)) {
|
|
++res;
|
|
rhn += lb+1;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
unsigned int rhncpy(unsigned char *dst, const unsigned char *src);
|
|
int isnormalencdomname(const unsigned char *rhn, unsigned maxlen);
|
|
|
|
inline static int is_inaddr_any(pdnsd_a *a) __attribute__((always_inline));
|
|
inline static int is_inaddr_any(pdnsd_a *a)
|
|
{
|
|
return SEL_IPVER( a->ipv4.s_addr==INADDR_ANY,
|
|
IN6_IS_ADDR_UNSPECIFIED(&a->ipv6) );
|
|
}
|
|
|
|
|
|
inline static int same_inaddr(pdnsd_a *a, pdnsd_a *b)
|
|
__attribute__((always_inline));
|
|
inline static int same_inaddr(pdnsd_a *a, pdnsd_a *b)
|
|
{
|
|
return SEL_IPVER( a->ipv4.s_addr==b->ipv4.s_addr,
|
|
IN6_ARE_ADDR_EQUAL(&a->ipv6,&b->ipv6) );
|
|
}
|
|
|
|
/* Compare a pdnsd_a* with a pdnsd_a2*. */
|
|
inline static int same_inaddr2(pdnsd_a *a, pdnsd_a2 *b)
|
|
__attribute__((always_inline));
|
|
inline static int same_inaddr2(pdnsd_a *a, pdnsd_a2 *b)
|
|
{
|
|
return SEL_IPVER( a->ipv4.s_addr==b->ipv4.s_addr,
|
|
IN6_ARE_ADDR_EQUAL(&a->ipv6,&b->ipv6) && b->ipv4.s_addr==INADDR_ANY );
|
|
}
|
|
|
|
inline static int equiv_inaddr2(pdnsd_a *a, pdnsd_a2 *b)
|
|
__attribute__((always_inline));
|
|
inline static int equiv_inaddr2(pdnsd_a *a, pdnsd_a2 *b)
|
|
{
|
|
return SEL_IPVER( a->ipv4.s_addr==b->ipv4.s_addr,
|
|
IN6_ARE_ADDR_EQUAL(&a->ipv6,&b->ipv6) ||
|
|
(b->ipv4.s_addr!=INADDR_ANY && ADDR_EQUIV6_4(&a->ipv6,&b->ipv4)) );
|
|
}
|
|
|
|
int str2pdnsd_a(const char *addr, pdnsd_a *a);
|
|
const char *pdnsd_a2str(pdnsd_a *a, char *buf, int maxlen);
|
|
|
|
int init_rng(void);
|
|
#ifdef RANDOM_DEVICE
|
|
extern FILE *rand_file;
|
|
/* Because this is usually empty, it is now defined as a macro to save overhead.*/
|
|
#define free_rng() {if (rand_file) fclose(rand_file);}
|
|
#else
|
|
#define free_rng()
|
|
#endif
|
|
|
|
unsigned short get_rand16(void);
|
|
|
|
int fsprintf(int fd, const char *format, ...) printfunc(2, 3);
|
|
#if !defined(CPP_C99_VARIADIC_MACROS)
|
|
/* GNU C Macro Varargs style. */
|
|
# define fsprintf_or_return(args...) {int _retval; if((_retval=fsprintf(args))<0) return _retval;}
|
|
#else
|
|
/* ANSI C99 style variadic macro. */
|
|
# define fsprintf_or_return(...) {int _retval; if((_retval=fsprintf(__VA_ARGS__))<0) return _retval;}
|
|
#endif
|
|
|
|
/* Added by Paul Rombouts */
|
|
inline static ssize_t write_all(int fd,const void *data,size_t n)
|
|
__attribute__((always_inline));
|
|
inline static ssize_t write_all(int fd,const void *data,size_t n)
|
|
{
|
|
ssize_t written=0;
|
|
|
|
while(written<n) {
|
|
ssize_t m=write(fd,(const void*)(((const char*)data)+written),n-written);
|
|
|
|
if(m<0)
|
|
return m;
|
|
|
|
written+=m;
|
|
}
|
|
|
|
return written;
|
|
}
|
|
|
|
void hexdump(const void *data, int dlen, char *buf, int buflen);
|
|
int escapestr(const char *in, int ilen, char *str, int size);
|
|
|
|
#if 0
|
|
inline static int stricomp(const char *a, const char *b)
|
|
{
|
|
return !strcasecmp(a,b);
|
|
}
|
|
#endif
|
|
|
|
/* compare two names in length byte - string format
|
|
rhnicmp returns 1 if the names are the same (ignoring upper/lower case),
|
|
0 otherwise.
|
|
*/
|
|
inline static int rhnicmp(const unsigned char *a, const unsigned char *b)
|
|
__attribute__((always_inline));
|
|
inline static int rhnicmp(const unsigned char *a, const unsigned char *b)
|
|
{
|
|
unsigned int i=0;
|
|
unsigned char lb;
|
|
for(;;) {
|
|
lb=a[i];
|
|
if(lb!=b[i]) return 0;
|
|
if(!lb) break;
|
|
++i;
|
|
do {
|
|
if(tolower(a[i])!=tolower(b[i])) return 0;
|
|
++i;
|
|
} while(--lb);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Bah. I want strlcpy. */
|
|
inline static int strncp(char *dst, const char *src, size_t dstsz)
|
|
__attribute__((always_inline));
|
|
inline static int strncp(char *dst, const char *src, size_t dstsz)
|
|
{
|
|
#ifdef HAVE_STRLCPY
|
|
return (strlcpy(dst,src,dstsz)<dstsz);
|
|
#else
|
|
#ifdef HAVE_STPNCPY
|
|
char *p=stpncpy(dst,src,dstsz);
|
|
if(p<dst+dstsz) return 1;
|
|
*(p-1)='\0';
|
|
return 0;
|
|
#else
|
|
strncpy(dst,src,dstsz);
|
|
if(strlen(src)<dstsz) return 1;
|
|
dst[dstsz-1]='\0';
|
|
return 0;
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
#ifndef HAVE_STRDUP
|
|
inline static char *strdup(const char *s)
|
|
__attribute__((always_inline));
|
|
inline static char *strdup(const char *s)
|
|
{
|
|
size_t sz=strlen(s)+1;
|
|
char *cp=malloc(sz);
|
|
if(cp)
|
|
memcpy(cp,s,sz);
|
|
return cp;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_STRNDUP
|
|
/* This version may allocate a buffer that is unnecessarily large,
|
|
but I'm always going to use it with n<strlen(s)
|
|
*/
|
|
inline static char *strndup(const char *s, size_t n)
|
|
__attribute__((always_inline));
|
|
inline static char *strndup(const char *s, size_t n)
|
|
{
|
|
char *cp;
|
|
cp=malloc(n+1);
|
|
if(cp) {
|
|
memcpy(cp,s,n);
|
|
cp[n]='\0';
|
|
}
|
|
return cp;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_STPCPY
|
|
inline static char *stpcpy (char *dest, const char *src)
|
|
__attribute__((always_inline));
|
|
inline static char *stpcpy (char *dest, const char *src)
|
|
{
|
|
register char *d = dest;
|
|
register const char *s = src;
|
|
|
|
while ((*d++ = *s++) != '\0');
|
|
|
|
return d - 1;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_MEMPCPY
|
|
inline static void *mempcpy(void *dest, const void *src, size_t len)
|
|
__attribute__((always_inline));
|
|
inline static void *mempcpy(void *dest, const void *src, size_t len)
|
|
{
|
|
memcpy(dest,src,len);
|
|
return ((char *)dest)+len;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_GETLINE
|
|
int getline(char **lineptr, size_t *n, FILE *stream);
|
|
#endif
|
|
|
|
#ifndef HAVE_ASPRINTF
|
|
int asprintf (char **lineptr, const char *format, ...);
|
|
#endif
|
|
|
|
#ifndef HAVE_VASPRINTF
|
|
#include <stdarg.h>
|
|
int vasprintf (char **lineptr, const char *format, va_list va);
|
|
#endif
|
|
|
|
#ifndef HAVE_INET_NTOP
|
|
const char *inet_ntop(int af, const void *src, char *dst, size_t size);
|
|
#endif
|
|
|
|
#define strlitlen(strlit) (sizeof(strlit)-1)
|
|
|
|
#endif /* HELPERS_H */
|