Author: is
Date: 2011-11-09 13:54:07 +0000 (Wed, 09 Nov 2011)
New Revision: 4268

Modified:
trunk/src/core/ngx_resolver.c
Log:
Fixed compression pointer processing in DNS response greater than 255 bytes.

Thanks to Ben Hawkes.


Modified: trunk/src/core/ngx_resolver.c
===================================================================
--- trunk/src/core/ngx_resolver.c 2011-11-08 13:48:23 UTC (rev 4267)
+++ trunk/src/core/ngx_resolver.c 2011-11-09 13:54:07 UTC (rev 4268)
@@ -1952,7 +1952,13 @@
n = *src++;

for ( ;; ) {
- if (n != 0xc0) {
+ if (n & 0xc0) {
+ n = ((n & 0x3f) << 8) + *src;
+ src = &buf[n];
+
+ n = *src++;
+
+ } else {
ngx_memcpy(dst, src, n);
dst += n;
src += n;
@@ -1962,12 +1968,6 @@
if (n != 0) {
*dst++ = '.';
}
-
- } else {
- n = ((n & 0x3f) << 8) + *src;
- src = &buf[n];
-
- n = *src++;
}

if (n == 0) {

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