-#include <event.h>
+/*
+ *
+ * Copyright (c) 1998-2012 by the citadel.org team
+ *
+ * This program is open source 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __EVENT_CLIENT_H__
+#define __EVENT_CLIENT_H__
+#define EV_COMPAT3 0
+#include "sysconfig.h"
+#include <ev.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <ares.h>
+#include <curl/curl.h>
typedef struct AsyncIO AsyncIO;
typedef enum _eNextState {
- eSendReply,
+ eSendDNSQuery,
+ eReadDNSReply,
+
+ eDBQuery,
+
+ eConnect,
+ eSendReply,
eSendMore,
- eReadMessage,
+ eSendFile,
+
+ eReadMessage,
+ eReadMore,
+ eReadPayload,
+ eReadFile,
+
+ eTerminateConnection,
eAbort
}eNextState;
-typedef int (*EventContextAttach)(void *Data);
-typedef eNextState (*IO_CallBack)(void *Data);
+typedef eNextState (*IO_CallBack)(AsyncIO *IO);
typedef eReadState (*IO_LineReaderCallback)(AsyncIO *IO);
+typedef void (*ParseDNSAnswerCb)(AsyncIO*, unsigned char*, int);
+typedef void (*FreeDNSReply)(void *DNSData);
-struct AsyncIO {
- int sock;
- struct event recv_event, send_event;
- IOBuffer SendBuf, RecvBuf;
- IO_LineReaderCallback LineReader;
- IO_CallBack ReadDone, SendDone;
- StrBuf *IOBuf;
+
+typedef struct __ReadAsyncMsg {
+ StrBuf *MsgBuf;
+ size_t maxlen; /* maximum message length */
+
+ const char *terminator; /* token signalling EOT */
+ long tlen;
+ int dodot;
+
+ int flushing;
+/* if we read maxlen, read until nothing more arives and ignore this. */
+
+ int crlf; /* CRLF newlines instead of LF */
+} ReadAsyncMsg;
+
+
+typedef struct _DNSQueryParts {
+ ParseDNSAnswerCb DNS_CB;
+ IO_CallBack PostDNS;
+
+ int DNSStatus;
+ void *VParsedDNSReply;
+ FreeDNSReply DNSReplyFree;
void *Data;
+} DNSQueryParts;
+
+typedef struct _evcurl_request_data
+{
+ CURL *chnd;
+ struct curl_slist *headers;
+ char errdesc[CURL_ERROR_SIZE];
+
+ int attached;
+
+ char *PlainPostData;
+ long PlainPostDataLen;
+ StrBuf *PostData;
+
+ StrBuf *ReplyData;
+ long httpcode;
+} evcurl_request_data;
+
+/* DNS Related */
+typedef struct __evcares_data {
+ ev_tstamp Start;
+ ev_io recv_event,
+ send_event;
+ ev_timer timeout; /* timeout while requesting ips */
+#ifdef DEBUG_CARES
+ short int SourcePort;
+#endif
+ struct ares_options Options;
+ ares_channel Channel;
+ DNSQueryParts *Query;
+
+ IO_CallBack Fail; /* the dns lookup didn't work out. */
+} evcares_data;
+
+struct AsyncIO {
+ long ID;
+ ev_tstamp Now;
+ ev_tstamp StartIO;
+ ev_tstamp StartDB;
eNextState NextState;
+
+ /* connection related */
+ ParsedURL *ConnectMe;
+
+ /* read/send related... */
+ StrBuf *IOBuf;
+ IOBuffer SendBuf,
+ RecvBuf;
+
+ FDIOBuffer IOB;
+ /* when sending from / reading into files, this is used. */
+
+ /* our events... */
+ ev_cleanup abort_by_shutdown, /* server wants to go down... */
+ db_abort_by_shutdown; /* server wants to go down... */
+ ev_timer conn_fail, /* connection establishing timed out */
+ rw_timeout; /* timeout while sending data */
+ ev_idle unwind_stack, /* get c-ares out of the stack */
+ db_unwind_stack, /* wait for next db operation... */
+ conn_fail_immediate; /* unwind stack, but fail immediately. */
+ ev_io recv_event, /* receive data from the client */
+ send_event, /* send more data to the client */
+ conn_event; /* Connection successfully established */
+
+ StrBuf *ErrMsg; /* if we fail to connect, or lookup, error goes here. */
+
+ /* Citadel application callbacks... */
+ IO_CallBack ReadDone, /* Theres new data to read... */
+ SendDone, /* we may send more data */
+ Terminate, /* shutting down... */
+ DBTerminate, /* shutting down... */
+ Timeout, /* Timeout handler;may also be conn. timeout */
+ ConnFail, /* What to do when one connection failed? */
+ ShutdownAbort,/* we're going down. make your piece. */
+ NextDBOperation; /* Perform Database IO */
+
+ /* if we have linereaders, maybe we want to read more lines before
+ * the real application logic is called? */
+ IO_LineReaderCallback LineReader;
+
+ evcares_data DNS;
+
+ evcurl_request_data HttpReq;
+
+ /* Saving / loading a message async from / to disk */
+ ReadAsyncMsg *ReadMsg;
+ struct CtdlMessage *AsyncMsg;
+ struct recptypes *AsyncRcp;
+
+ /* Context specific data; Hint: put AsyncIO in there */
+ void *Data; /* application specific data */
+ void *CitContext; /* Citadel Session context... */
};
+typedef struct _IOAddHandler {
+ AsyncIO *IO;
+ IO_CallBack EvAttch;
+} IOAddHandler;
+
+#define CCID ((CitContext*)IO->CitContext)->cs_pid
+
+#define EV_syslog(LEVEL, FORMAT, ...) \
+ syslog(LEVEL, "IO[%ld]CC[%d]" FORMAT, IO->ID, CCID, __VA_ARGS__)
+
+#define EVM_syslog(LEVEL, FORMAT) \
+ syslog(LEVEL, "IO[%ld]CC[%d]" FORMAT, IO->ID, CCID)
+
+#define EVNC_syslog(LEVEL, FORMAT, ...) \
+ syslog(LEVEL, "IO[%ld]" FORMAT, IO->ID, __VA_ARGS__)
+
+#define EVNCM_syslog(LEVEL, FORMAT) syslog(LEVEL, "IO[%ld]" FORMAT, IO->ID)
+
+#ifdef DEBUG_CARES
+#define EV_DNS_LOG_START(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] + Starting " #a " %p FD %d", IO->ID, CCID, &IO->a, IO->a.fd); \
+ EV_backtrace(IO);
+
+#define EV_DNS_LOG_STOP(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] - Stopping " #a " %p FD %d", IO->ID, CCID, &IO->a, IO->a.fd); \
+ EV_backtrace(IO);
+
+#define EV_DNS_LOG_INIT(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] * Init " #a " %p FD %d", IO->ID, CCID, &IO->a, IO->a.fd); \
+ EV_backtrace(IO);
+
+#define EV_DNS_LOGT_START(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] + Starting " #a " %p", IO->ID, CCID, &IO->a); \
+ EV_backtrace(IO);
+
+#define EV_DNS_LOGT_STOP(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] - Stopping " #a " %p", IO->ID, CCID, &IO->a); \
+ EV_backtrace(IO);
+
+#define EV_DNS_LOGT_INIT(a) \
+ syslog(LOG_DEBUG, "IO[%ld]CC[%d] * Init " #a " %p", IO->ID, CCID, &IO->a); \
+ EV_backtrace(IO);
+#else
+#define EV_DNS_LOG_START(a)
+#define EV_DNS_LOG_STOP(a)
+#define EV_DNS_LOG_INIT(a)
+#define EV_DNS_LOGT_START(a)
+#define EV_DNS_LOGT_STOP(a)
+#define EV_DNS_LOGT_INIT(a)
+#endif
+
+void FreeAsyncIOContents(AsyncIO *IO);
+
+eNextState NextDBOperation(AsyncIO *IO, IO_CallBack CB);
+eNextState QueueDBOperation(AsyncIO *IO, IO_CallBack CB);
+eNextState QueueEventContext(AsyncIO *IO, IO_CallBack CB);
+eNextState QueueCurlContext(AsyncIO *IO);
+
+eNextState EvConnectSock(AsyncIO *IO,
+ double conn_timeout,
+ double first_rw_timeout,
+ int ReadFirst);
+void IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents);
+
+int QueueQuery(ns_type Type,
+ const char *name,
+ AsyncIO *IO,
+ DNSQueryParts *QueryParts,
+ IO_CallBack PostDNS);
+
+void QueueGetHostByName(AsyncIO *IO,
+ const char *Hostname,
+ DNSQueryParts *QueryParts,
+ IO_CallBack PostDNS);
+
+void QueryCbDone(AsyncIO *IO);
+
+void StopClient(AsyncIO *IO);
+
+void StopClientWatchers(AsyncIO *IO);
+
+void SetNextTimeout(AsyncIO *IO, double timeout);
+
+#include <curl/curl.h>
+
+#define OPT(s, v) \
+ do { \
+ sta = curl_easy_setopt(chnd, (CURLOPT_##s), (v)); \
+ if (sta) { \
+ syslog(LOG_ERR, \
+ "error setting option " #s \
+ " on curl handle: %s", \
+ curl_easy_strerror(sta)); \
+ } } while (0)
+
+void InitIOStruct(AsyncIO *IO,
+ void *Data,
+ eNextState NextState,
+ IO_LineReaderCallback LineReader,
+ IO_CallBack DNS_Fail,
+ IO_CallBack SendDone,
+ IO_CallBack ReadDone,
+ IO_CallBack Terminate,
+ IO_CallBack DBTerminate,
+ IO_CallBack ConnFail,
+ IO_CallBack Timeout,
+ IO_CallBack ShutdownAbort);
+
+int InitcURLIOStruct(AsyncIO *IO,
+ void *Data,
+ const char* Desc,
+ IO_CallBack SendDone,
+ IO_CallBack Terminate,
+ IO_CallBack DBTerminate,
+ IO_CallBack ShutdownAbort);
+
+eNextState ReAttachIO(AsyncIO *IO,
+ void *pData,
+ int ReadFirst);
-int QueueEventContext(void *Ctx, EventContextAttach CB);
+void EV_backtrace(AsyncIO *IO);
+ev_tstamp ctdl_ev_now (void);
-void InitEventIO(AsyncIO *IO,
- void *pData,
- IO_CallBack ReadDone,
- IO_CallBack SendDone,
- IO_LineReaderCallback LineReader,
- int ReadFirst);
+#endif /* __EVENT_CLIENT_H__ */
projects / citadel.git / blobdiff