Header And Logo
|
#include "postgres.h"#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <assert.h>#include <ctype.h>#include "utils/builtins.h"#include "utils/inet.h"
Go to the source code of this file.
Defines | |
| #define | NS_IN6ADDRSZ 16 |
| #define | NS_INT16SZ 2 |
| #define | NS_INADDRSZ 4 |
Functions | |
| static int | inet_net_pton_ipv4 (const char *src, u_char *dst) |
| static int | inet_cidr_pton_ipv4 (const char *src, u_char *dst, size_t size) |
| static int | inet_net_pton_ipv6 (const char *src, u_char *dst) |
| static int | inet_cidr_pton_ipv6 (const char *src, u_char *dst, size_t size) |
| int | inet_net_pton (int af, const char *src, void *dst, size_t size) |
| static int | getbits (const char *src, int *bitsp) |
| static int | getv4 (const char *src, u_char *dst, int *bitsp) |
| #define NS_IN6ADDRSZ 16 |
Definition at line 435 of file inet_net_pton.c.
Referenced by inet_cidr_pton_ipv6().
| #define NS_INADDRSZ 4 |
Definition at line 437 of file inet_net_pton.c.
Referenced by inet_cidr_pton_ipv6().
| #define NS_INT16SZ 2 |
Definition at line 436 of file inet_net_pton.c.
Referenced by inet_cidr_pton_ipv6().
| static int getbits | ( | const char * | src, | |
| int * | bitsp | |||
| ) | [static] |
Definition at line 350 of file inet_net_pton.c.
References digits, NULL, and val.
Referenced by getv4(), and inet_cidr_pton_ipv6().
{
static const char digits[] = "0123456789";
int n;
int val;
char ch;
val = 0;
n = 0;
while ((ch = *src++) != '\0')
{
const char *pch;
pch = strchr(digits, ch);
if (pch != NULL)
{
if (n++ != 0 && val == 0) /* no leading zeros */
return (0);
val *= 10;
val += (pch - digits);
if (val > 128) /* range */
return (0);
continue;
}
return (0);
}
if (n == 0)
return (0);
*bitsp = val;
return (1);
}
| static int getv4 | ( | const char * | src, | |
| u_char * | dst, | |||
| int * | bitsp | |||
| ) | [static] |
Definition at line 383 of file inet_net_pton.c.
References digits, getbits(), NULL, and val.
Referenced by inet_cidr_pton_ipv6().
{
static const char digits[] = "0123456789";
u_char *odst = dst;
int n;
u_int val;
char ch;
val = 0;
n = 0;
while ((ch = *src++) != '\0')
{
const char *pch;
pch = strchr(digits, ch);
if (pch != NULL)
{
if (n++ != 0 && val == 0) /* no leading zeros */
return (0);
val *= 10;
val += (pch - digits);
if (val > 255) /* range */
return (0);
continue;
}
if (ch == '.' || ch == '/')
{
if (dst - odst > 3) /* too many octets? */
return (0);
*dst++ = val;
if (ch == '/')
return (getbits(src, bitsp));
val = 0;
n = 0;
continue;
}
return (0);
}
if (n == 0)
return (0);
if (dst - odst > 3) /* too many octets? */
return (0);
*dst++ = val;
return (1);
}
| static int inet_cidr_pton_ipv4 | ( | const char * | src, | |
| u_char * | dst, | |||
| size_t | size | |||
| ) | [static] |
Definition at line 98 of file inet_net_pton.c.
References assert, and digits.
Referenced by inet_net_pton().
{
static const char xdigits[] = "0123456789abcdef";
static const char digits[] = "0123456789";
int n,
ch,
tmp = 0,
dirty,
bits;
const u_char *odst = dst;
ch = *src++;
if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
&& isxdigit((unsigned char) src[1]))
{
/* Hexadecimal: Eat nybble string. */
if (size <= 0U)
goto emsgsize;
dirty = 0;
src++; /* skip x or X. */
while ((ch = *src++) != '\0' && isxdigit((unsigned char) ch))
{
if (isupper((unsigned char) ch))
ch = tolower((unsigned char) ch);
n = strchr(xdigits, ch) - xdigits;
assert(n >= 0 && n <= 15);
if (dirty == 0)
tmp = n;
else
tmp = (tmp << 4) | n;
if (++dirty == 2)
{
if (size-- <= 0U)
goto emsgsize;
*dst++ = (u_char) tmp;
dirty = 0;
}
}
if (dirty)
{ /* Odd trailing nybble? */
if (size-- <= 0U)
goto emsgsize;
*dst++ = (u_char) (tmp << 4);
}
}
else if (isdigit((unsigned char) ch))
{
/* Decimal: eat dotted digit string. */
for (;;)
{
tmp = 0;
do
{
n = strchr(digits, ch) - digits;
assert(n >= 0 && n <= 9);
tmp *= 10;
tmp += n;
if (tmp > 255)
goto enoent;
} while ((ch = *src++) != '\0' &&
isdigit((unsigned char) ch));
if (size-- <= 0U)
goto emsgsize;
*dst++ = (u_char) tmp;
if (ch == '\0' || ch == '/')
break;
if (ch != '.')
goto enoent;
ch = *src++;
if (!isdigit((unsigned char) ch))
goto enoent;
}
}
else
goto enoent;
bits = -1;
if (ch == '/' && isdigit((unsigned char) src[0]) && dst > odst)
{
/* CIDR width specifier. Nothing can follow it. */
ch = *src++; /* Skip over the /. */
bits = 0;
do
{
n = strchr(digits, ch) - digits;
assert(n >= 0 && n <= 9);
bits *= 10;
bits += n;
} while ((ch = *src++) != '\0' && isdigit((unsigned char) ch));
if (ch != '\0')
goto enoent;
if (bits > 32)
goto emsgsize;
}
/* Firey death and destruction unless we prefetched EOS. */
if (ch != '\0')
goto enoent;
/* If nothing was written to the destination, we found no address. */
if (dst == odst)
goto enoent;
/* If no CIDR spec was given, infer width from net class. */
if (bits == -1)
{
if (*odst >= 240) /* Class E */
bits = 32;
else if (*odst >= 224) /* Class D */
bits = 8;
else if (*odst >= 192) /* Class C */
bits = 24;
else if (*odst >= 128) /* Class B */
bits = 16;
else
/* Class A */
bits = 8;
/* If imputed mask is narrower than specified octets, widen. */
if (bits < ((dst - odst) * 8))
bits = (dst - odst) * 8;
/*
* If there are no additional bits specified for a class D address
* adjust bits to 4.
*/
if (bits == 8 && *odst == 224)
bits = 4;
}
/* Extend network to cover the actual mask. */
while (bits > ((dst - odst) * 8))
{
if (size-- <= 0U)
goto emsgsize;
*dst++ = '\0';
}
return (bits);
enoent:
errno = ENOENT;
return (-1);
emsgsize:
errno = EMSGSIZE;
return (-1);
}
| static int inet_cidr_pton_ipv6 | ( | const char * | src, | |
| u_char * | dst, | |||
| size_t | size | |||
| ) | [static] |
Definition at line 440 of file inet_net_pton.c.
References digits, getbits(), getv4(), i, NS_IN6ADDRSZ, NS_INADDRSZ, NS_INT16SZ, NULL, and val.
Referenced by inet_net_pton(), and inet_net_pton_ipv6().
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
u_char tmp[NS_IN6ADDRSZ],
*tp,
*endp,
*colonp;
const char *xdigits,
*curtok;
int ch,
saw_xdigit;
u_int val;
int digits;
int bits;
if (size < NS_IN6ADDRSZ)
goto emsgsize;
memset((tp = tmp), '\0', NS_IN6ADDRSZ);
endp = tp + NS_IN6ADDRSZ;
colonp = NULL;
/* Leading :: requires some special handling. */
if (*src == ':')
if (*++src != ':')
goto enoent;
curtok = src;
saw_xdigit = 0;
val = 0;
digits = 0;
bits = -1;
while ((ch = *src++) != '\0')
{
const char *pch;
if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
pch = strchr((xdigits = xdigits_u), ch);
if (pch != NULL)
{
val <<= 4;
val |= (pch - xdigits);
if (++digits > 4)
goto enoent;
saw_xdigit = 1;
continue;
}
if (ch == ':')
{
curtok = src;
if (!saw_xdigit)
{
if (colonp)
goto enoent;
colonp = tp;
continue;
}
else if (*src == '\0')
goto enoent;
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
saw_xdigit = 0;
digits = 0;
val = 0;
continue;
}
if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
getv4(curtok, tp, &bits) > 0)
{
tp += NS_INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
if (ch == '/' && getbits(src, &bits) > 0)
break;
goto enoent;
}
if (saw_xdigit)
{
if (tp + NS_INT16SZ > endp)
goto enoent;
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
}
if (bits == -1)
bits = 128;
endp = tmp + 16;
if (colonp != NULL)
{
/*
* Since some memmove()'s erroneously fail to handle overlapping
* regions, we'll do the shift by hand.
*/
const int n = tp - colonp;
int i;
if (tp == endp)
goto enoent;
for (i = 1; i <= n; i++)
{
endp[-i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if (tp != endp)
goto enoent;
/*
* Copy out the result.
*/
memcpy(dst, tmp, NS_IN6ADDRSZ);
return (bits);
enoent:
errno = ENOENT;
return (-1);
emsgsize:
errno = EMSGSIZE;
return (-1);
}
| int inet_net_pton | ( | int | af, | |
| const char * | src, | |||
| void * | dst, | |||
| size_t | size | |||
| ) |
Definition at line 63 of file inet_net_pton.c.
References inet_cidr_pton_ipv4(), inet_cidr_pton_ipv6(), inet_net_pton_ipv4(), inet_net_pton_ipv6(), PGSQL_AF_INET, and PGSQL_AF_INET6.
Referenced by network_in().
{
switch (af)
{
case PGSQL_AF_INET:
return size == -1 ?
inet_net_pton_ipv4(src, dst) :
inet_cidr_pton_ipv4(src, dst, size);
case PGSQL_AF_INET6:
return size == -1 ?
inet_net_pton_ipv6(src, dst) :
inet_cidr_pton_ipv6(src, dst, size);
default:
errno = EAFNOSUPPORT;
return (-1);
}
}
| static int inet_net_pton_ipv4 | ( | const char * | src, | |
| u_char * | dst | |||
| ) | [static] |
Definition at line 261 of file inet_net_pton.c.
References assert, and digits.
Referenced by inet_net_pton().
{
static const char digits[] = "0123456789";
const u_char *odst = dst;
int n,
ch,
tmp,
bits;
size_t size = 4;
/* Get the mantissa. */
while (ch = *src++, isdigit((unsigned char) ch))
{
tmp = 0;
do
{
n = strchr(digits, ch) - digits;
assert(n >= 0 && n <= 9);
tmp *= 10;
tmp += n;
if (tmp > 255)
goto enoent;
} while ((ch = *src++) != '\0' && isdigit((unsigned char) ch));
if (size-- == 0)
goto emsgsize;
*dst++ = (u_char) tmp;
if (ch == '\0' || ch == '/')
break;
if (ch != '.')
goto enoent;
}
/* Get the prefix length if any. */
bits = -1;
if (ch == '/' && isdigit((unsigned char) src[0]) && dst > odst)
{
/* CIDR width specifier. Nothing can follow it. */
ch = *src++; /* Skip over the /. */
bits = 0;
do
{
n = strchr(digits, ch) - digits;
assert(n >= 0 && n <= 9);
bits *= 10;
bits += n;
} while ((ch = *src++) != '\0' && isdigit((unsigned char) ch));
if (ch != '\0')
goto enoent;
if (bits > 32)
goto emsgsize;
}
/* Firey death and destruction unless we prefetched EOS. */
if (ch != '\0')
goto enoent;
/* Prefix length can default to /32 only if all four octets spec'd. */
if (bits == -1)
{
if (dst - odst == 4)
bits = 32;
else
goto enoent;
}
/* If nothing was written to the destination, we found no address. */
if (dst == odst)
goto enoent;
/* If prefix length overspecifies mantissa, life is bad. */
if ((bits / 8) > (dst - odst))
goto enoent;
/* Extend address to four octets. */
while (size-- > 0)
*dst++ = 0;
return bits;
enoent:
errno = ENOENT;
return (-1);
emsgsize:
errno = EMSGSIZE;
return (-1);
}
| static int inet_net_pton_ipv6 | ( | const char * | src, | |
| u_char * | dst | |||
| ) | [static] |
Definition at line 430 of file inet_net_pton.c.
References inet_cidr_pton_ipv6().
Referenced by inet_net_pton().
{
return inet_cidr_pton_ipv6(src, dst, 16);
}
1.7.1