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Diffstat (limited to 'src/backend/utils/adt/inet_net_ntop.c')
-rw-r--r--src/backend/utils/adt/inet_net_ntop.c180
1 files changed, 110 insertions, 70 deletions
diff --git a/src/backend/utils/adt/inet_net_ntop.c b/src/backend/utils/adt/inet_net_ntop.c
index 0287fec27f0..7a38c535569 100644
--- a/src/backend/utils/adt/inet_net_ntop.c
+++ b/src/backend/utils/adt/inet_net_ntop.c
@@ -16,7 +16,7 @@
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.15 2003/06/25 01:08:13 momjian Exp $";
+static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.16 2003/08/04 00:43:25 momjian Exp $";
#endif
#include "postgres.h"
@@ -40,13 +40,13 @@ static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.15 2003/06/25 01:08:13 mom
#endif
static char *inet_net_ntop_ipv4(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
static char *inet_cidr_ntop_ipv4(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
static char *inet_net_ntop_ipv6(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
static char *inet_cidr_ntop_ipv6(const u_char *src, int bits,
- char *dst, size_t size);
+ char *dst, size_t size);
/*
* char *
@@ -160,26 +160,30 @@ emsgsize:
* 0x11110000 in its fourth octet.
* author:
* Vadim Kogan (UCB), June 2001
- * Original version (IPv4) by Paul Vixie (ISC), July 1996
+ * Original version (IPv4) by Paul Vixie (ISC), July 1996
*/
static char *
inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
{
- u_int m;
- int b;
- int p;
- int zero_s, zero_l, tmp_zero_s, tmp_zero_l;
- int i;
- int is_ipv4 = 0;
- int double_colon = 0;
+ u_int m;
+ int b;
+ int p;
+ int zero_s,
+ zero_l,
+ tmp_zero_s,
+ tmp_zero_l;
+ int i;
+ int is_ipv4 = 0;
+ int double_colon = 0;
unsigned char inbuf[16];
- char outbuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
- char *cp;
- int words;
- u_char *s;
+ char outbuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
+ char *cp;
+ int words;
+ u_char *s;
- if (bits < 0 || bits > 128) {
+ if (bits < 0 || bits > 128)
+ {
errno = EINVAL;
return (NULL);
}
@@ -187,20 +191,24 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
cp = outbuf;
double_colon = 0;
- if (bits == 0) {
+ if (bits == 0)
+ {
*cp++ = ':';
*cp++ = ':';
*cp = '\0';
double_colon = 1;
- } else {
- /* Copy src to private buffer. Zero host part. */
+ }
+ else
+ {
+ /* Copy src to private buffer. Zero host part. */
p = (bits + 7) / 8;
memcpy(inbuf, src, p);
memset(inbuf + p, 0, 16 - p);
b = bits % 8;
- if (b != 0) {
+ if (b != 0)
+ {
m = ~0 << (8 - b);
- inbuf[p-1] &= m;
+ inbuf[p - 1] &= m;
}
s = inbuf;
@@ -212,13 +220,18 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
/* Find the longest substring of zero's */
zero_s = zero_l = tmp_zero_s = tmp_zero_l = 0;
- for (i = 0; i < (words * 2); i += 2) {
- if ((s[i] | s[i+1]) == 0) {
+ for (i = 0; i < (words * 2); i += 2)
+ {
+ if ((s[i] | s[i + 1]) == 0)
+ {
if (tmp_zero_l == 0)
tmp_zero_s = i / 2;
tmp_zero_l++;
- } else {
- if (tmp_zero_l && zero_l < tmp_zero_l) {
+ }
+ else
+ {
+ if (tmp_zero_l && zero_l < tmp_zero_l)
+ {
zero_s = tmp_zero_s;
zero_l = tmp_zero_l;
tmp_zero_l = 0;
@@ -226,23 +239,27 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
}
}
- if (tmp_zero_l && zero_l < tmp_zero_l) {
+ if (tmp_zero_l && zero_l < tmp_zero_l)
+ {
zero_s = tmp_zero_s;
zero_l = tmp_zero_l;
}
if (zero_l != words && zero_s == 0 && ((zero_l == 6) ||
- ((zero_l == 5 && s[10] == 0xff && s[11] == 0xff) ||
- ((zero_l == 7 && s[14] != 0 && s[15] != 1)))))
+ ((zero_l == 5 && s[10] == 0xff && s[11] == 0xff) ||
+ ((zero_l == 7 && s[14] != 0 && s[15] != 1)))))
is_ipv4 = 1;
/* Format whole words. */
- for (p = 0; p < words; p++) {
- if (zero_l != 0 && p >= zero_s && p < zero_s + zero_l) {
+ for (p = 0; p < words; p++)
+ {
+ if (zero_l != 0 && p >= zero_s && p < zero_s + zero_l)
+ {
/* Time to skip some zeros */
if (p == zero_s)
*cp++ = ':';
- if (p == words - 1) {
+ if (p == words - 1)
+ {
*cp++ = ':';
double_colon = 1;
}
@@ -251,15 +268,19 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
continue;
}
- if (is_ipv4 && p > 5 ) {
+ if (is_ipv4 && p > 5)
+ {
*cp++ = (p == 6) ? ':' : '.';
cp += SPRINTF((cp, "%u", *s++));
/* we can potentially drop the last octet */
- if (p != 7 || bits > 120) {
+ if (p != 7 || bits > 120)
+ {
*cp++ = '.';
cp += SPRINTF((cp, "%u", *s++));
}
- } else {
+ }
+ else
+ {
if (cp != outbuf)
*cp++ = ':';
cp += SPRINTF((cp, "%x", *s * 256 + s[1]));
@@ -268,7 +289,8 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
}
}
- if (!double_colon) {
+ if (!double_colon)
+ {
if (bits < 128 - 32)
cp += SPRINTF((cp, "::"));
else if (bits < 128 - 16)
@@ -281,7 +303,7 @@ inet_cidr_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
if (strlen(outbuf) + 1 > size)
goto emsgsize;
strcpy(dst, outbuf);
-
+
return (dst);
emsgsize:
@@ -373,21 +395,24 @@ emsgsize:
}
static int
-decoct(const u_char *src, int bytes, char *dst, size_t size) {
- char *odst = dst;
- char *t;
- int b;
+decoct(const u_char *src, int bytes, char *dst, size_t size)
+{
+ char *odst = dst;
+ char *t;
+ int b;
- for (b = 1; b <= bytes; b++) {
+ for (b = 1; b <= bytes; b++)
+ {
if (size < sizeof "255.")
return (0);
t = dst;
dst += SPRINTF((dst, "%u", *src++));
- if (b != bytes) {
+ if (b != bytes)
+ {
*dst++ = '.';
*dst = '\0';
}
- size -= (size_t)(dst - t);
+ size -= (size_t) (dst - t);
}
return (dst - odst);
}
@@ -402,42 +427,52 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
* 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;
+ 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)) {
+ 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.
+ * 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;
- for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
- if (words[i] == 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) {
+ }
+ else
+ {
+ if (cur.base != -1)
+ {
if (best.base == -1 || cur.len > best.len)
best = cur;
cur.base = -1;
}
}
}
- if (cur.base != -1) {
+ if (cur.base != -1)
+ {
if (best.base == -1 || cur.len > best.len)
best = cur;
}
@@ -448,10 +483,12 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
* Format the result.
*/
tp = tmp;
- for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
+ 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)) {
+ i < (best.base + best.len))
+ {
if (i == best.base)
*tp++ = ':';
continue;
@@ -461,12 +498,14 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
*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) {
+ (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);
}
@@ -477,8 +516,8 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
}
/* Was it a trailing run of 0x00's? */
- if (best.base != -1 && (best.base + best.len) ==
- (NS_IN6ADDRSZ / NS_INT16SZ))
+ if (best.base != -1 && (best.base + best.len) ==
+ (NS_IN6ADDRSZ / NS_INT16SZ))
*tp++ = ':';
*tp = '\0';
@@ -488,7 +527,8 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
/*
* Check for overflow, copy, and we're done.
*/
- if ((size_t)(tp - tmp) > size) {
+ if ((size_t) (tp - tmp) > size)
+ {
errno = EMSGSIZE;
return (NULL);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-21 04:27:25 +0000