1 #ifndef __EVENT_CLIENT_H__
2 #define __EVENT_CLIENT_H__
6 #include <sys/socket.h>
8 #include <arpa/nameser.h>
10 #include <curl/curl.h>
12 typedef struct AsyncIO AsyncIO;
14 typedef enum _eNextState {
34 typedef eNextState (*IO_CallBack)(AsyncIO *IO);
35 typedef eReadState (*IO_LineReaderCallback)(AsyncIO *IO);
36 typedef void (*ParseDNSAnswerCb)(AsyncIO*, unsigned char*, int);
37 typedef void (*FreeDNSReply)(void *DNSData);
40 typedef struct __ReadAsyncMsg {
42 size_t maxlen; /* maximum message length */
44 const char *terminator; /* token signalling EOT */
48 int flushing; /* if we read maxlen, read until nothing more arives and ignore this. */
50 int crlf; /* CRLF newlines instead of LF */
54 typedef struct _DNSQueryParts {
55 ParseDNSAnswerCb DNS_CB;
59 void *VParsedDNSReply;
60 FreeDNSReply DNSReplyFree;
64 typedef struct _evcurl_request_data
67 struct curl_slist *headers;
68 char errdesc[CURL_ERROR_SIZE];
73 long PlainPostDataLen;
78 } evcurl_request_data;
83 /* connection related */
86 /* read/send related... */
91 FDIOBuffer IOB; /* when sending from / reading into files, this is used. */
94 ev_cleanup abort_by_shutdown, /* server wants to go down... */
95 db_abort_by_shutdown; /* server wants to go down... */
96 ev_timer conn_fail, /* connection establishing timed out */
97 rw_timeout; /* timeout while sending data */
98 ev_idle unwind_stack, /* get c-ares out of the stack */
99 db_unwind_stack, /* wait for next db operation... */
100 conn_fail_immediate; /* unwind stack, but fail immediately. */
101 ev_io recv_event, /* receive data from the client */
102 send_event, /* send more data to the client */
103 conn_event; /* Connection successfully established */
105 StrBuf *ErrMsg; /* if we fail to connect, or lookup, error goes here. */
107 /* Citadel application callbacks... */
108 IO_CallBack ReadDone, /* Theres new data to read... */
109 SendDone, /* we may send more data */
110 Terminate, /* shutting down... */
111 Timeout, /* Timeout handler; may also be connection timeout */
112 ConnFail, /* What to do when one connection failed? */
113 DNSFail, /* the dns lookup didn't work out. */
114 ShutdownAbort,/* we're going down. make your piece. */
115 NextDBOperation; /* Perform Database IO */
117 IO_LineReaderCallback LineReader; /* if we have linereaders, maybe we want to read more lines before the real application logic is called? */
120 ev_io dns_recv_event,
122 struct ares_options DNSOptions;
123 ares_channel DNSChannel;
124 DNSQueryParts *DNSQuery;
126 evcurl_request_data HttpReq;
128 /* Saving / loading a message async from / to disk */
129 ReadAsyncMsg *ReadMsg;
130 struct CtdlMessage *AsyncMsg;
131 struct recptypes *AsyncRcp;
132 /* Custom data; its expected to contain AsyncIO so we can save malloc()s... */
133 void *Data; /* application specific data */
134 void *CitContext; /* Citadel Session context... */
137 typedef struct _IOAddHandler {
142 void FreeAsyncIOContents(AsyncIO *IO);
144 eNextState NextDBOperation(AsyncIO *IO, IO_CallBack CB);
145 eNextState QueueDBOperation(AsyncIO *IO, IO_CallBack CB);
146 eNextState QueueEventContext(AsyncIO *IO, IO_CallBack CB);
147 int ShutDownEventQueue(void);
149 eNextState InitEventIO(AsyncIO *IO,
152 double first_rw_timeout,
154 void IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents);
156 int QueueQuery(ns_type Type, const char *name, AsyncIO *IO, DNSQueryParts *QueryParts, IO_CallBack PostDNS);
157 void QueueGetHostByName(AsyncIO *IO, const char *Hostname, DNSQueryParts *QueryParts, IO_CallBack PostDNS);
159 void QueryCbDone(AsyncIO *IO);
161 void StopClient(AsyncIO *IO);
163 void StopClientWatchers(AsyncIO *IO);
165 void SetNextTimeout(AsyncIO *IO, double timeout);
167 void InitC_ares_dns(AsyncIO *IO);
169 #include <curl/curl.h>
173 sta = curl_easy_setopt(chnd, (CURLOPT_##s), (v)); \
175 syslog(LOG_ERR, "error setting option " #s " on curl handle: %s", curl_easy_strerror(sta)); \
179 int evcurl_init(AsyncIO *IO,
182 IO_CallBack CallBack,
183 IO_CallBack Terminate);
185 eNextState ReAttachIO(AsyncIO *IO,
189 void evcurl_handle_start(AsyncIO *IO);
191 #endif /* __EVENT_CLIENT_H__ */