Diff: cyclone_tcp/mdns/mdns_common.h

Revision:

0:8918a71cdbe9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cyclone_tcp/mdns/mdns_common.h	Sat Feb 04 18:15:49 2017 +0000
@@ -0,0 +1,118 @@
+/**
+ * @file mdns_common.h
+ * @brief Functions common to mDNS client and mDNS responder
+ *
+ * @section License
+ *
+ * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
+ *
+ * This file is part of CycloneTCP Open.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * @author Oryx Embedded SARL (www.oryx-embedded.com)
+ * @version 1.7.6
+ **/
+
+#ifndef _MDNS_COMMON_H
+#define _MDNS_COMMON_H
+
+//Dependencies
+#include "core/net.h"
+#include "dns/dns_common.h"
+
+//Maximum size of DNS messages
+#ifndef MDNS_MESSAGE_MAX_SIZE
+   #define MDNS_MESSAGE_MAX_SIZE 1024
+#elif (MDNS_MESSAGE_MAX_SIZE < 1)
+   #error MDNS_MESSAGE_MAX_SIZE parameter is not valid
+#endif
+
+//Default resource record TTL (cache lifetime)
+#ifndef MDNS_DEFAULT_RR_TTL
+   #define MDNS_DEFAULT_RR_TTL 120
+#elif (MDNS_DEFAULT_RR_TTL < 1)
+   #error MDNS_DEFAULT_RR_TTL parameter is not valid
+#endif
+
+//mDNS port number
+#define MDNS_PORT 5353
+//Default IP TTL value
+#define MDNS_DEFAULT_IP_TTL 255
+//Maximum RR TTL in legacy unicast responses
+#define MDNS_LEGACY_UNICAST_RR_TTL 10
+
+//QU flag
+#define MDNS_QCLASS_QU 0x8000
+//Cache Flush flag
+#define MDNS_RCLASS_CACHE_FLUSH 0x8000
+
+//mDNS IPv4 multicast group
+#define MDNS_IPV4_MULTICAST_ADDR IPV4_ADDR(224, 0, 0, 251)
+
+
+/**
+ * @brief mDNS message
+ **/
+
+typedef struct
+{
+   NetBuffer *buffer;
+   size_t offset;
+   size_t length;
+   const IpPseudoHeader *pseudoHeader;
+   const UdpHeader *udpHeader;
+   DnsHeader *dnsHeader;
+   systime_t timestamp;
+   systime_t timeout;
+   uint_t sharedRecordCount;
+} MdnsMessage;
+
+
+//mDNS IPv6 multicast group
+extern const Ipv6Addr MDNS_IPV6_MULTICAST_ADDR;
+
+//mDNS related functions
+error_t mdnsInit(NetInterface *interface);
+
+void mdnsProcessMessage(NetInterface *interface, const IpPseudoHeader *pseudoHeader,
+   const UdpHeader *udpHeader, const NetBuffer *buffer, size_t offset, void *params);
+
+void mdnsProcessResponse(NetInterface *interface, MdnsMessage *response);
+
+bool_t mdnsCheckSourceAddr(NetInterface *interface,
+   const IpPseudoHeader *pseudoHeader);
+
+error_t mdnsCreateMessage(MdnsMessage *message, bool_t queryResponse);
+void mdnsDeleteMessage(MdnsMessage *message);
+
+error_t mdnsSendMessage(NetInterface *interface, const MdnsMessage *message,
+   const IpAddr *destIpAddr, uint_t destPort);
+
+size_t mdnsEncodeName(const char_t *instance, const char_t *service,
+   const char_t *domain, uint8_t *dest);
+
+int_t mdnsCompareName(const DnsHeader *message, size_t length, size_t pos,
+   const char_t *instance, const char_t *service, const char_t *domain, uint_t level);
+
+int_t mdnsCompareRecord(const MdnsMessage *message1, size_t offset1,
+   const DnsResourceRecord *record1, const MdnsMessage *message2,
+   size_t offset2, const DnsResourceRecord *record2);
+
+bool_t mdnsCheckDuplicateRecord(const MdnsMessage *message, const char_t *instance,
+   const char_t *service, const char_t *domain, uint16_t rtype);
+
+#endif
+