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windows version revival (dev-cpp)
1 /* this is libspopc.h file, part of the libspopc library sources
2 * copyright © 2002- Benoit Rouits <brouits@free.fr>
3 * released under the terms of the GNU Lesser General Public Licence.
4 *
5 * libspopc offers simple API for a pop3 client.
6 * See RFC 1725 for pop3 specifications.
7 * more information on http://herewe.servebeer.com/libspopc/
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #ifndef LIBSPOPC_H
25 #define LIBSPOPC_H
26
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 #include <sys/types.h>
32
33 #ifdef WIN32
34 #include <winsock.h>
35 #if BUILDING_DLL
36 # define DLLIMPORT __declspec (dllexport)
37 #else /* Not BUILDING_DLL */
38 # define DLLIMPORT __declspec (dllimport)
39 #endif /* Not BUILDING_DLL */
40 #else
41 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <netdb.h>
44 #define DLLIMPORT
45 #endif
46
47 /* thread-safe version of libspopc (>0.8) */
48
49 /* call this function before to use any routine from libspopc */
50 DLLIMPORT int libspopc_init(void);
51
52 /* call this function when you do not use anymore libspopc routines */
53 DLLIMPORT int libspopc_clean(void);
54
55 #ifdef USE_SSL
56
57 #include <openssl/ssl.h>
58
59 /******************************************************************************
60 * If compiled with SSL support, the low-level functions will act on a
61 * "pop3sock" structure, which contains the socket, SSL instance and context
62 * for the connection. This structure is dynamically allocated and initialized
63 * when you do pop3_prepare() or popbegin(), and is cleaned-up and destroyed in
64 * pop3_disconnect() or popend().
65 ******************************************************************************/
66
67 typedef struct {
68 int sock;
69 SSL *ssl;
70 SSL_CTX *ctx;
71 } pop3sock;
72
73 typedef pop3sock* pop3sock_t;
74
75 #define BAD_SOCK NULL
76
77 /******************************************************************************
78 * Use pop3_cert_setup() to specify the location of your SSL certificate
79 * bundle. If it is not set (or set to NULL), SSL connections can be still be
80 * made, but certificates will not be verified!
81 * This function sets a global variable, and should be called before
82 * pop3_prepare() or popbegin() if you want to verify certs.
83 *
84 * Hint: If you have a recent version of curl/libcurl installed, you can try
85 * setting this to the output of: "curl-config --ca"
86 ******************************************************************************/
87 DLLIMPORT void pop3_cert_setup(const char *certfile);
88
89 /******************************************************************************
90 * pop3_ssl_never() disable the use of SSL on any port, even 995.
91 * pop3_ssl_auto() enable the use of SSL only on port 995. (default)
92 * pop3_ssl_always() enable the use of SSL on any port, even 110.
93 *
94 * These functions set a library-wide variable, and should be called before
95 * pop3_prepare() or popbegin() if you want to modify libspopc behaviour.
96 * By default, not calling any of these, the behaviour of libspopc follows
97 * the same as pop3_ssl_auto() for backward compatibility reason.
98 ******************************************************************************/
99 DLLIMPORT void pop3_ssl_never(void);
100 DLLIMPORT void pop3_ssl_auto(void);
101 DLLIMPORT void pop3_ssl_always(void);
102
103 #else /* Non-SSL */
104
105 /******************************************************************************
106 * If the library is compiled without SSL, the "pop3sock_t" type is a simple
107 * integer (i.e. socket) and all the functions should work just as they did
108 * in previous libspopc versions (< 0.8).
109 ******************************************************************************/
110
111 typedef int pop3sock_t;
112
113
114 #define BAD_SOCK -1
115
116 #endif /* SSL/Non-SSL */
117
118
119 /***************************************
120 * low-level methods for a pop3 client *
121 ***************************************/
122 #define SOCKET_TIMEOUT 15 /* seconds a socket can block read/write */
123 #define TCPBUFLEN 512 /* length of generic socket buffer */
124 #define POPBUF 513 /* length of the pop resp: 512 bytes (RFC1939) + '\0' */
125 /******************************************************************************
126 * Be careful, using the low-level API is uncompliant with using the high
127 * level API. Here, you make your choice. If you don't know the pop3 protocol
128 * or what a socket is, it is then warmly recommended to use the *high-level*
129 * API if which is shown far below on this file.
130 ******************************************************************************/
131
132 /**************
133 * connecting *
134 **************/
135
136 DLLIMPORT pop3sock_t pop3_prepare(const char* servername, const int port, struct sockaddr_in* connection, struct hostent* server);
137 /* prepares the pop session and returns a socket descriptor, or BAD_SOCK on error */
138
139 DLLIMPORT char* pop3_connect(pop3sock_t sock, struct sockaddr_in* connection);
140 /* connects to the server through the sock and returns server's welcome */
141
142 DLLIMPORT void pop3_disconnect(pop3sock_t sock, struct hostent* server);
143 /* close socket and free server info */
144
145
146 /****************
147 * pop3 queries *
148 ****************/
149
150 DLLIMPORT char* pop3_user(pop3sock_t sock, const char* name);
151 /* performs "USER" pop query and returns server's <=512 bytes resp */
152
153 DLLIMPORT char* pop3_pass(pop3sock_t sock, const char* pw);
154 /* performs "PASS" pop query and return server's <=512 bytes resp */
155
156 DLLIMPORT char* pop3_quit(pop3sock_t sock);
157 /* performs "QUIT" pop query and returns server's <=512 bytes resp */
158
159 DLLIMPORT char* pop3_stat(pop3sock_t sock);
160 /* performs "STAT" pop query and returns server's <=512 bytes resp */
161
162
163 DLLIMPORT char* pop3_list(pop3sock_t sock, int id);
164 /* performs a "LIST" pop query and returns server's (long) resp */
165
166 DLLIMPORT char* pop3_retr(pop3sock_t sock, int id);
167 /* performs a "RETR" pop query and returns server's (long) resp */
168
169 DLLIMPORT char* pop3_dele(pop3sock_t sock, int id);
170 /* performs a "DELE" pop query and returns server's <=512 bytes resp */
171
172 DLLIMPORT char* pop3_noop(pop3sock_t sock);
173 /* performs a "NOOP" pop query and returns server's <=512 bytes resp */
174
175 DLLIMPORT char* pop3_rset(pop3sock_t sock);
176 /* performs a "RSET" pop query and returns server's <=512 bytes resp */
177
178 DLLIMPORT char* pop3_top(pop3sock_t sock, int id, int lines);
179 /* performs a "TOP" pop query and returns server's (long) resp */
180
181 DLLIMPORT char* pop3_uidl(pop3sock_t sock, int id);
182 /* performs a "UIDL" pop query and returns server's (long) resp */
183
184 DLLIMPORT char* pop3_apop(pop3sock_t sock, const char* name, const char* digest);
185 /* performs a "APOP" secure pop query and returns server's <=512 bytes resp */
186
187
188 /*********************
189 * parsing utilities *
190 *********************/
191 #define DOTBEGIN(s) ((s)[0]=='\n'&&(s)[1]=='.')
192
193 int dotline(char* buf);
194 /* returns 1 if 'buf' contains a "\n.\n" or "\n.\0" or \r.(etc) substring
195 * buf must be terminated by '\0' */
196
197 DLLIMPORT int pop3_error(char* string);
198 /* returns 1 on pop server error (i.e : -ERR ...) or NULL reply */
199
200 /************************************
201 * reply re-formatting, after query *
202 ************************************/
203 DLLIMPORT char* nextline(char* string);
204 /* returns a pointer to the next line of given string */
205
206 DLLIMPORT char* retr2msg(char* data);
207 /* returns formatted mail from a pop RETR X query
208 * must only be called on data returned by pop3_retr() */
209
210 DLLIMPORT void freemsg(char* msg);
211 /* free the message received by reetr2msg */
212
213 DLLIMPORT int* list2array(char* poplist);
214 /* WARNING: must not be called after a mail deletion
215 * returns an int array of sizes of messages from a LIST pop query
216 * array[0] holds id of the array's last element
217 * must only be called on data received by a pop3_list(sock,0) request */
218
219 DLLIMPORT void freelistarray(int* array);
220 /* free the message sizes array created by list2array */
221
222 DLLIMPORT int listi2size(char* resp);
223 /* grep the given size (in bytes) in resp after a pop3_list(sock,ID) request
224 * do not use after a pop3_list(sock,0) ! */
225
226 DLLIMPORT int stat2num(char* resp);
227 /* returns the number of downloadable messages on pop server */
228
229 DLLIMPORT int stat2bytes(char* resp);
230 /* returns the sumsize in bytes of all stored messages on server
231 * must only be called just after a pop3_stat() request */
232
233 DLLIMPORT char** uidl2array(char* resp);
234 /* WARNING: mus not be called after a mail deletion
235 * returns an array of unique strings for each message id
236 * array[0] gives array's last id
237 * must only be called just after a pop3_uidl(sock,0) request */
238
239 DLLIMPORT void freeuidlarray(char** arrray);
240 /* free the uidl array created by uidl2array */
241
242 DLLIMPORT char* uidli2sig(char* resp);
243 /* grep the pop signature of *one* message signature reply
244 * should only be called on data received by a pop3_uidl(sock,ID) request
245 * do not use it after a pop3_uidl(sock,0) ! */
246
247
248 /***************************************************
249 * high-level API for a SIMPLE MDA/MUA *
250 ***************************************************/
251
252 /******************************************************************************
253 * This is the high-level API of libspopc and it is recommended to use it
254 * instead of the low-level one. This high-level API, in spite of its very
255 * 'teasing' name, just provides a *very simple* way to access and query a
256 * pop3 server with your e-mail client. This API handles pop3 in a very
257 * convenient manner for the non 'socket-aware' C developper.
258 ******************************************************************************/
259
260 typedef struct{
261 pop3sock_t sock; /* socket descriptor */
262 struct sockaddr_in* connection;
263 struct hostent* server;
264 int* list; /* pop messages size list */
265 char** uidl; /* pop messages signature list */
266 int bytes; /* total stored (in bytes) on pop server */
267 int last; /* last available message id */
268 int num; /* number of available messages */
269 int del; /* 0|1 flag to ask deletion of retrieved messages */
270 int sync; /* session state: 1 = sync-ed; 0 = need sync */
271 } popsession;
272
273 #define popbytes(s) ((s)->bytes)
274 /* gives the total stored data size (in bytes) on the pop server
275 * arg 's' is type 'popsession*'; 'result' is type 'int' */
276
277 #define popsetdel(s) ((s)->del=1)
278 /* asks the session to delete any retrieved messages on the server
279 * arg 's' is type 'popsession*' */
280
281 #define popsetundel(s) ((s)->del=0)
282 /* asks the session to not delete any retrieved message on the server
283 * arg 's' is type 'popsession*' */
284
285 #define popmsgsize(s,i) ((s)->list[(i)])
286 /* gives the size of message 'i' for session 's'
287 * args are type 'session*'(s) and 'int'(i)
288 * 'i' must *not* be 0 */
289
290 #define popmsguid(s,i) ((s)->uidl[(i)])
291 /* points to the 'char*' uid (unique signature) of 'int'(i) message id */
292
293 DLLIMPORT int poplast(popsession* session);
294 /* gives the id of the last message of the current session */
295
296 DLLIMPORT int popnum(popsession* session);
297 /* gives the current number of stored message. it is != to poplast() */
298
299 DLLIMPORT char* popbegin(const char* servername,const char* user, const char* pass, popsession** sp);
300 /* prepares, connect and get lists of messages stored on pop server
301 * you must give a valid servername, user and pass
302 * returns an error message if a problem occurs, else NULL */
303
304 DLLIMPORT char* popgethead(popsession* session, int id);
305 /* returns the header of a message (id between 1 and poplast()) or NULL on bad id */
306
307 DLLIMPORT char* popgetmsg(popsession* session, int id);
308 /* returns a message (id between 1 and poplast()) or NULL on bad id */
309
310 DLLIMPORT int popdelmsg(popsession* session, int id);
311 /* deletes message 'id' on pop server
312 * returns -1 on server error, 0 else */
313
314 DLLIMPORT int popchkmsg(popsession* session, int id);
315 /* tells if a message is still accessible on the server (not deleted)
316 * returns 1 of so, or 0 if message has been marked for deletion */
317
318 DLLIMPORT int popcancel(popsession* session);
319 /* cancels all previous deletion on pop server
320 * returns -1 on server error, 0 else */
321
322 DLLIMPORT int popsync(popsession* session);
323 /* re-synchronize the session object from the server
324 * need to be called if session->sync is 0
325 * returns -1 on error, 0 else */
326
327 DLLIMPORT void popend(popsession* session);
328 /* quit and destroys pop session */
329
330 #ifdef __cplusplus
331 }
332 #endif
333 #endif

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