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git.ipfire.org Git - thirdparty/squid.git/blob - src/dns/rfc2671.cc
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2 * Copyright (C) 1996-2016 The Squid Software Foundation and contributors
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
10 #include "dns/rfc1035.h"
11 #include "dns/rfc2671.h"
14 rfc2671RROptPack(char *buf
, size_t sz
, ssize_t edns_sz
)
16 // set the OPT record correctly. base it on a macro size of the Squid DNS read buffer
17 static rfc1035_rr opt
;
19 // EDNS OPT record says only what our DNS buffer size is so far.
20 snprintf(opt
.name
, RFC1035_MAXHOSTNAMESZ
, ".");
21 opt
.type
= RFC1035_TYPE_OPT
;
22 opt
._class
= min(edns_sz
, (ssize_t
)SQUID_UDP_SO_RCVBUF
-1);
23 opt
.ttl
= 0; // relevant?
27 return rfc1035RRPack(buf
, sz
, &opt
);