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authorHenryk Plötz <henryk@ploetzli.ch>2014-10-03 20:22:01 +0200
committerHenryk Plötz <henryk@ploetzli.ch>2014-10-03 20:29:44 +0200
commit7f632c0640f174bbbc1deb532e3a3977d595d28a (patch)
tree3df92847b2e58d2ced6daa00222fb77458023593 /edns0.c
parenteaaa5b4f9301ae2e5a29dd77616d8e29fd3b2c28 (diff)
downloadtinydnssec-7f632c0640f174bbbc1deb532e3a3977d595d28a.tar.gz
tinydnssec-7f632c0640f174bbbc1deb532e3a3977d595d28a.tar.bz2
Apply djbdns-1.05-dnssec.patch
SHA1 62e2ce1d31f1fe908fac84fc8bd049a12621810f, contained in tinydnssec-1.05-1.3.tar.bz2 Source was http://www.tinydnssec.org/download/tinydnssec-1.05-1.3.tar.bz2, SHA1 b33d5c3e0de67f6427aad8c00a99580b59804075
Diffstat (limited to 'edns0.c')
-rw-r--r--edns0.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/edns0.c b/edns0.c
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+/* (C) 2012 Peter Conrad <conrad@quisquis.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "dns.h"
+#include "edns0.h"
+#include "response.h"
+#include "uint16.h"
+
+unsigned int check_edns0(const char header[12], const char *buf, const int len, unsigned int pos)
+{
+char opt_class[2];
+char opt_ttl[4];
+
+ max_response_len = 512;
+ do_dnssec = 0;
+ if (!header[6] && !header[7] && !header[8] && !header[9]
+ && !header[10] && header[11] == 1) {
+ char nametype[3];
+ uint16 size, min_len;
+ pos = dns_packet_copy(buf,len,pos,nametype,3); if (!pos) return pos;
+ if (nametype[0] || nametype[1] || nametype[2] != DNS_T_OPT[1]) return pos;
+ pos = dns_packet_copy(buf,len,pos,opt_class,2); if (!pos) return pos;
+ pos = dns_packet_copy(buf,len,pos,opt_ttl,4); if (!pos) return pos;
+ if (opt_ttl[0]) return pos; // unsupported RCODE in query
+ if (opt_ttl[1]) return pos; // unsupported version
+ do_dnssec = opt_ttl[2] & 0x80;
+ uint16_unpack_big(opt_class, &size);
+ min_len = do_dnssec ? 1220 : 512;
+ max_response_len = size > 4000 ? 4000 : size;
+ if (max_response_len < min_len) { max_response_len = min_len; }
+ }
+ return pos;
+}