[IOMultiplexerV2] alpha

[NextIRCd.git] / src / IOHandler / IODNSLookup.h

diff --git a/src/IOHandler/IODNSLookup.h b/src/IOHandler/IODNSLookup.h
new file mode 100644 (file)
index 0000000..29574cb
--- /dev/null
+++ b/src/IOHandler/IODNSLookup.h
@@ -0,0 +1,155 @@
+/* IODNSLookup.h - IOMultiplexer v2
+ * Copyright (C) 2014  Philipp Kreil (pk910)
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>. 
+ */
+#ifndef _IODNSLookup_h
+#define _IODNSLookup_h
+#include <stdlib.h>
+#include "IODNSAddress.struct.h"
+
+#ifndef _IOHandler_internals
+#include "IOHandler.h"
+#else
+
+struct IODNSEngine;
+extern struct IODNSEngine dnsengine_cares;
+extern struct IODNSEngine dnsengine_default;
+
+struct _IODNSQuery;
+extern struct _IODNSQuery *iodnsquery_first;
+extern struct _IODNSQuery *iodnsquery_last;
+
+/* Multithreading */
+#ifdef IODNS_USE_THREADS
+#ifndef HAVE_PTHREAD_H
+#undef IODNS_USE_THREADS
+#endif
+#endif
+#ifdef IODNS_USE_THREADS
+#include <pthread.h>
+#ifdef PTHREAD_MUTEX_RECURSIVE_NP
+#define PTHREAD_MUTEX_RECURSIVE_VAL PTHREAD_MUTEX_RECURSIVE_NP
+#else
+#define PTHREAD_MUTEX_RECURSIVE_VAL PTHREAD_MUTEX_RECURSIVE
+#endif
+#define IOTHREAD_MUTEX_INIT(var) { \
+    pthread_mutexattr_t mutex_attr; \
+    pthread_mutexattr_init(&mutex_attr);\
+    pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE_VAL);\
+    pthread_mutex_init(&var, &mutex_attr); \
+}
+#define IOSYNCHRONIZE(var) pthread_mutex_lock(&var)
+#define IODESYNCHRONIZE(var) pthread_mutex_unlock(&var)
+#else
+#define IOTHREAD_MUTEX_INIT(var)
+#define IOSYNCHRONIZE(var)
+#define IODESYNCHRONIZE(var)
+#endif
+
+#define IODNSFLAG_RUNNING        0x01
+#define IODNSFLAG_PROCESSING     0x02
+#define IODNSFLAG_PARENT_PUBLIC  0x04
+#define IODNSFLAG_PARENT_SOCKET  0x08
+
+struct IODNSResult;
+
+struct _IODNSQuery {
+       void *query;
+       
+       unsigned int flags : 8;
+       unsigned int type : 8;
+    union {
+               struct IODNSAddress addr;
+               char *host;
+       } request;
+       
+       struct IODNSResult *result;
+       
+       void *parent;
+       
+       struct _IODNSQuery *next, *prev;
+};
+
+struct IODNSEngine {
+    const char *name;
+    int (*init)();
+       void (*stop)();
+    void (*add)(struct _IODNSQuery *query);
+    void (*remove)(struct _IODNSQuery *query);
+    void (*loop)();
+};
+
+void _init_iodns();
+void _stop_iodns();
+struct _IODNSQuery *_create_dnsquery();
+void _start_dnsquery(struct _IODNSQuery *query);
+void _stop_dnsquery(struct _IODNSQuery *query);
+
+/* call only from engines! */
+enum IODNSEventType;
+void _free_dnsquery(struct _IODNSQuery *query);
+void iodns_event_callback(struct _IODNSQuery *query, enum IODNSEventType state);
+
+void iodns_poll();
+
+#endif
+
+struct IODNSEvent;
+struct sockaddr;
+
+#define IODNS_CALLBACK(NAME) void NAME(struct IODNSEvent *event)
+typedef IODNS_CALLBACK(iodns_callback);
+
+enum IODNSEventType {
+    IODNSEVENT_SUCCESS,
+    IODNSEVENT_FAILED
+};
+
+#define IODNS_RECORD_A    0x01
+#define IODNS_RECORD_AAAA 0x02
+#define IODNS_RECORD_PTR  0x04
+
+#define IODNS_FORWARD     0x03
+#define IODNS_REVERSE     0x04
+
+struct IODNSQuery {
+       void *query;
+       
+    iodns_callback *callback;
+    void *data;
+};
+
+struct IODNSResult {
+    unsigned int type : 8;
+    union {
+               struct IODNSAddress addr;
+               char *host;
+       } result;
+    struct IODNSResult *next;
+};
+
+struct IODNSEvent {
+    enum IODNSEventType type;
+    struct IODNSQuery *query;
+       struct IODNSResult *result;
+};
+
+struct IODNSQuery *iodns_getaddrinfo(char *hostname, int records, iodns_callback *callback);
+struct IODNSQuery *iodns_getnameinfo(const struct sockaddr *addr, size_t addrlen, iodns_callback *callback);
+void iodns_abort(struct IODNSQuery *query);
+
+void iodns_free_result(struct IODNSResult *result);
+
+#endif