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/
usr/
src/
courier-0.66.1/
rfc1035/
- drwxrwxrwx
|
Viewing file:  rfc1035an.c (2.33 KB) -rw-rw-rw-Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
** Copyright 1998 - 2000 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "config.h"
#include "rfc1035.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
void rfc1035_ntoa_ipv4(const struct in_addr *in, char *buf)
{
union {
unsigned char addr[4];
RFC1035_UINT32 n;
} u;
int i;
char *p;
char pbuf[4];
u.n=in->s_addr;
for (i=0; i<4; i++)
{
if (i) *buf++='.';
p=pbuf+3;
*p=0;
do
{
*--p = '0' + (u.addr[i] % 10);
} while ( (u.addr[i] /= 10) != 0);
while (*p)
*buf++ = *p++;
}
*buf=0;
}
void rfc1035_ntoa(const RFC1035_ADDR *in, char *buf)
{
#if RFC1035_IPV6
inet_ntop(AF_INET6, in, buf, RFC1035_MAXNAMESIZE+1);
#else
rfc1035_ntoa_ipv4(in, buf);
#endif
}
static RFC1035_UINT32 doaton(const char *p, int *err)
{
RFC1035_UINT32 octets[4];
int i;
int base;
*err=1;
for (i=0; i<4; i++)
{
if (i > 0)
{
if (*p == '\0') break;
if (*p != '.') return ( -1 );
++p;
}
if (*p < '0' || *p > '9') return (-1);
octets[i]=0;
base=10;
if (*p == '0') base=8;
while (*p >= '0' && *p < '0'+base)
octets[i] = octets[i] * base + (*p++ - '0');
}
if (*p) return ( -1 );
*err=0;
if (i == 1) return (octets[0]);
*err=1;
if (octets[0] > 255) return ( -1 );
octets[0] <<= 24;
if (i == 2)
{
if (octets[1] > 0x00FFFFFF) return ( -1 );
*err=0;
return (octets[0] | octets[1]);
}
if (octets[1] > 255) return ( -1 );
octets[1] <<= 16;
if (i == 3)
{
if (octets[2] > 0x0000FFFF) return ( -1 );
*err=0;
return (octets[0] | octets[1] | octets[2]);
}
if (octets[2] > 255 || octets[3] > 255) return ( -1 );
*err=0;
return (octets[0] | octets[1] | (octets[2] << 8) | octets[3]);
}
int rfc1035_aton_ipv4(const char *p, struct in_addr *in4)
{
int dummy;
RFC1035_UINT32 n=doaton(p, &dummy);
union {
unsigned char addr[4];
struct in_addr n;
} u;
u.addr[3]=n;
u.addr[2]=n >> 8;
u.addr[1]=n >> 16;
u.addr[0]=n >> 24;
if (dummy) errno=EINVAL;
*in4=u.n;
return (dummy);
}
#if RFC1035_IPV6
int rfc1035_aton(const char *p, RFC1035_ADDR *in6)
{
struct in_addr in4;
if (rfc1035_aton_ipv4(p, &in4) == 0)
{
rfc1035_ipv4to6(in6, &in4);
return (0);
}
if (inet_pton(AF_INET6, p, in6) <= 0)
return (-1);
return (0);
}
#else
int rfc1035_aton(const char *p, RFC1035_ADDR *in4)
{
return (rfc1035_aton_ipv4(p, in4));
}
#endif
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