3 /***************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at http://curl.haxx.se/docs/copyright.html.
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
23 ***************************************************************************/
29 #if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_FTP) || \
30 !defined(CURL_DISABLE_POP3) || !defined(CURL_DISABLE_SMTP)
34 /* forward-declaration, this is defined in urldata.h */
38 * 'pingpong' is the generic struct used for protocols doing server<->client
39 * conversations in a back-and-forth style such as FTP, IMAP, POP3, SMTP etc.
41 * It holds response cache and non-blocking sending data.
44 char *cache; /* data cache between getresponse()-calls */
45 size_t cache_size; /* size of cache in bytes */
46 size_t nread_resp; /* number of bytes currently read of a server response */
47 char *linestart_resp; /* line start pointer for the server response
49 bool pending_resp; /* set TRUE when a server response is pending or in
50 progress, and is cleared once the last response is
52 char *sendthis; /* allocated pointer to a buffer that is to be sent to the
54 size_t sendleft; /* number of bytes left to send from the sendthis buffer */
55 size_t sendsize; /* total size of the sendthis buffer */
56 struct timeval response; /* set to Curl_tvnow() when a command has been sent
57 off, used to time-out response reading */
58 long response_time; /* When no timeout is given, this is the amount of
59 milliseconds we await for a server response. */
61 struct connectdata *conn; /* points to the connectdata struct that this
64 /* Function pointers the protocols MUST implement and provide for the
65 pingpong layer to function */
67 CURLcode (*statemach_act)(struct connectdata *conn);
69 int (*endofresp)(struct pingpong *pp, int *code);
73 * Curl_pp_multi_statemach()
75 * called repeatedly until done when the multi interface is used.
77 CURLcode Curl_pp_multi_statemach(struct pingpong *pp);
80 * Curl_pp_easy_statemach()
82 * called repeatedly until done when the easy interface is used.
84 CURLcode Curl_pp_easy_statemach(struct pingpong *pp);
87 /* initialize stuff to prepare for reading a fresh new response */
88 void Curl_pp_init(struct pingpong *pp);
90 /* Returns timeout in ms. 0 or negative number means the timeout has already
92 long Curl_pp_state_timeout(struct pingpong *pp);
95 /***********************************************************************
99 * Send the formated string as a command to a pingpong server. Note that
100 * the string should not have any CRLF appended, as this function will
101 * append the necessary things itself.
103 * NOTE: we build the command in a fixed-length buffer, which sets length
104 * restrictions on the command!
106 * made to never block
108 CURLcode Curl_pp_sendf(struct pingpong *pp,
109 const char *fmt, ...);
111 /***********************************************************************
115 * Send the formated string as a command to a pingpong server. Note that
116 * the string should not have any CRLF appended, as this function will
117 * append the necessary things itself.
119 * NOTE: we build the command in a fixed-length buffer, which sets length
120 * restrictions on the command!
122 * made to never block
124 CURLcode Curl_pp_vsendf(struct pingpong *pp,
131 * Reads a piece of a server response.
133 CURLcode Curl_pp_readresp(curl_socket_t sockfd,
135 int *code, /* return the server code if done */
136 size_t *size); /* size of the response */
139 CURLcode Curl_pp_flushsend(struct pingpong *pp);
141 /* call this when a pingpong connection is disconnected */
142 CURLcode Curl_pp_disconnect(struct pingpong *pp);
144 int Curl_pp_getsock(struct pingpong *pp, curl_socket_t *socks,
147 #endif /* __PINGPONG_H */