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DNS Update fix. A misconfigured server could crash during DNS update

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processing if the configuration included overlapping pools or
multiple fixed-address entries for a single address.  This issue
affected both IPv4 and IPv6. The fix allows a server to detect such
conditions, provides the user with extra information and recommended
steps to fix the problem.  If the user enables the appropriate option
in site.h then server will be terminated
This commit is contained in:
Shawn Routhier
2011-07-08 22:49:11 +00:00
parent 355fb647bc
commit beaed73f00
6 changed files with 338 additions and 30 deletions
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10
common/dns.c
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@@ -3,7 +3,7 @@
Domain Name Service subroutines. */
/*
* Copyright (c) 2009-2010 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 2009-2011 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 2004-2007 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 2001-2003 by Internet Software Consortium
*
@@ -448,12 +448,20 @@ ddns_cb_alloc(const char *file, int line)
}
}
#if defined (DEBUG_DNS_UPDATES)
log_info("%s(%d): Allocating ddns_cb=%p", file, line, ddns_cb);
#endif
return(ddns_cb);
}
void
ddns_cb_free(dhcp_ddns_cb_t *ddns_cb, const char *file, int line)
{
#if defined (DEBUG_DNS_UPDATES)
log_info("%s(%d): freeing ddns_cb=%p", file, line, ddns_cb);
#endif
data_string_forget(&ddns_cb->fwd_name, file, line);
data_string_forget(&ddns_cb->rev_name, file, line);
data_string_forget(&ddns_cb->dhcid, file, line);