Header And Logo
|
#include "postgres.h"#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include "utils/inet.h"
Go to the source code of this file.
Defines | |
| #define | NS_IN6ADDRSZ 16 |
| #define | NS_INT16SZ 2 |
| #define | SPRINTF(x) ((size_t)sprintf x) |
Functions | |
| static char * | inet_net_ntop_ipv4 (const u_char *src, int bits, char *dst, size_t size) |
| static char * | inet_net_ntop_ipv6 (const u_char *src, int bits, char *dst, size_t size) |
| char * | inet_net_ntop (int af, const void *src, int bits, char *dst, size_t size) |
| static int | decoct (const u_char *src, int bytes, char *dst, size_t size) |
| #define NS_IN6ADDRSZ 16 |
Definition at line 48 of file inet_net_ntop.c.
Referenced by inet_net_ntop_ipv6().
| #define NS_INT16SZ 2 |
Definition at line 49 of file inet_net_ntop.c.
Referenced by inet_net_ntop_ipv6().
| #define SPRINTF | ( | x | ) | ((size_t)sprintf x) |
Definition at line 54 of file inet_net_ntop.c.
Referenced by decoct(), inet_net_ntop_ipv4(), and inet_net_ntop_ipv6().
| static int decoct | ( | const u_char * | src, | |
| int | bytes, | |||
| char * | dst, | |||
| size_t | size | |||
| ) | [static] |
Definition at line 157 of file inet_net_ntop.c.
References SPRINTF.
Referenced by inet_net_ntop_ipv6().
{
char *odst = dst;
char *t;
int b;
for (b = 1; b <= bytes; b++)
{
if (size <= sizeof "255.")
return (0);
t = dst;
dst += SPRINTF((dst, "%u", *src++));
if (b != bytes)
{
*dst++ = '.';
*dst = '\0';
}
size -= (size_t) (dst - t);
}
return (dst - odst);
}
| char* inet_net_ntop | ( | int | af, | |
| const void * | src, | |||
| int | bits, | |||
| char * | dst, | |||
| size_t | size | |||
| ) |
Definition at line 78 of file inet_net_ntop.c.
References inet_net_ntop_ipv4(), inet_net_ntop_ipv6(), NULL, PGSQL_AF_INET, and PGSQL_AF_INET6.
Referenced by connectFailureMessage(), getnameinfo(), inet_abbrev(), network_host(), network_out(), and network_show().
{
/*
* We need to cover both the address family constants used by the PG inet
* type (PGSQL_AF_INET and PGSQL_AF_INET6) and those used by the system
* libraries (AF_INET and AF_INET6). We can safely assume PGSQL_AF_INET
* == AF_INET, but the INET6 constants are very likely to be different. If
* AF_INET6 isn't defined, silently ignore it.
*/
switch (af)
{
case PGSQL_AF_INET:
return (inet_net_ntop_ipv4(src, bits, dst, size));
case PGSQL_AF_INET6:
#if defined(AF_INET6) && AF_INET6 != PGSQL_AF_INET6
case AF_INET6:
#endif
return (inet_net_ntop_ipv6(src, bits, dst, size));
default:
errno = EAFNOSUPPORT;
return (NULL);
}
}
| static char * inet_net_ntop_ipv4 | ( | const u_char * | src, | |
| int | bits, | |||
| char * | dst, | |||
| size_t | size | |||
| ) | [static] |
Definition at line 116 of file inet_net_ntop.c.
Referenced by inet_net_ntop().
{
char *odst = dst;
char *t;
int len = 4;
int b;
if (bits < 0 || bits > 32)
{
errno = EINVAL;
return (NULL);
}
/* Always format all four octets, regardless of mask length. */
for (b = len; b > 0; b--)
{
if (size <= sizeof ".255")
goto emsgsize;
t = dst;
if (dst != odst)
*dst++ = '.';
dst += SPRINTF((dst, "%u", *src++));
size -= (size_t) (dst - t);
}
/* don't print masklen if 32 bits */
if (bits != 32)
{
if (size <= sizeof "/32")
goto emsgsize;
dst += SPRINTF((dst, "/%u", bits));
}
return (odst);
emsgsize:
errno = EMSGSIZE;
return (NULL);
}
| static char * inet_net_ntop_ipv6 | ( | const u_char * | src, | |
| int | bits, | |||
| char * | dst, | |||
| size_t | size | |||
| ) | [static] |
Definition at line 180 of file inet_net_ntop.c.
References cur, decoct(), i, NS_IN6ADDRSZ, NS_INT16SZ, NULL, and SPRINTF.
Referenced by inet_net_ntop().
{
/*
* Note that int32_t and int16_t need only be "at least" large enough to
* contain a value of the specified size. On some systems, like Crays,
* there is no such thing as an integer variable with 16 bits. Keep this
* in mind if you think this function should have been coded to use
* pointer overlays. All the world's not a VAX.
*/
char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255/128"];
char *tp;
struct
{
int base,
len;
} best, cur;
u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
int i;
if ((bits < -1) || (bits > 128))
{
errno = EINVAL;
return (NULL);
}
/*
* Preprocess: Copy the input (bytewise) array into a wordwise array. Find
* the longest run of 0x00's in src[] for :: shorthanding.
*/
memset(words, '\0', sizeof words);
for (i = 0; i < NS_IN6ADDRSZ; i++)
words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
best.base = -1;
cur.base = -1;
best.len = 0;
cur.len = 0;
for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
{
if (words[i] == 0)
{
if (cur.base == -1)
cur.base = i, cur.len = 1;
else
cur.len++;
}
else
{
if (cur.base != -1)
{
if (best.base == -1 || cur.len > best.len)
best = cur;
cur.base = -1;
}
}
}
if (cur.base != -1)
{
if (best.base == -1 || cur.len > best.len)
best = cur;
}
if (best.base != -1 && best.len < 2)
best.base = -1;
/*
* Format the result.
*/
tp = tmp;
for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
{
/* Are we inside the best run of 0x00's? */
if (best.base != -1 && i >= best.base &&
i < (best.base + best.len))
{
if (i == best.base)
*tp++ = ':';
continue;
}
/* Are we following an initial run of 0x00s or any real hex? */
if (i != 0)
*tp++ = ':';
/* Is this address an encapsulated IPv4? */
if (i == 6 && best.base == 0 && (best.len == 6 ||
(best.len == 7 && words[7] != 0x0001) ||
(best.len == 5 && words[5] == 0xffff)))
{
int n;
n = decoct(src + 12, 4, tp, sizeof tmp - (tp - tmp));
if (n == 0)
{
errno = EMSGSIZE;
return (NULL);
}
tp += strlen(tp);
break;
}
tp += SPRINTF((tp, "%x", words[i]));
}
/* Was it a trailing run of 0x00's? */
if (best.base != -1 && (best.base + best.len) ==
(NS_IN6ADDRSZ / NS_INT16SZ))
*tp++ = ':';
*tp = '\0';
if (bits != -1 && bits != 128)
tp += SPRINTF((tp, "/%u", bits));
/*
* Check for overflow, copy, and we're done.
*/
if ((size_t) (tp - tmp) > size)
{
errno = EMSGSIZE;
return (NULL);
}
strcpy(dst, tmp);
return (dst);
}
1.7.1