1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/**
* @file network.h Network API
* @ingroup core
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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 2 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef _PURPLE_NETWORK_H_
#define _PURPLE_NETWORK_H_
#ifdef __cplusplus
extern "C" {
#endif
/**************************************************************************/
/** @name Network API */
/**************************************************************************/
/*@{*/
typedef struct _PurpleNetworkListenData PurpleNetworkListenData;
typedef void (*PurpleNetworkListenCallback) (int listenfd, gpointer data);
/**
* Converts a dot-decimal IP address to an array of unsigned
* chars. For example, converts 192.168.0.1 to a 4 byte
* array containing 192, 168, 0 and 1.
*
* @param ip An IP address in dot-decimal notiation.
* @return An array of 4 bytes containing an IP addresses
* equivalent to the given parameter, or NULL if
* the given IP address is invalid. This value
* is statically allocated and should not be
* freed.
*/
const unsigned char *purple_network_ip_atoi(const char *ip);
/**
* Sets the IP address of the local system in preferences. This
* is the IP address that should be used for incoming connections
* (file transfer, direct IM, etc.) and should therefore be
* publicly accessible.
*
* @param ip The local IP address.
*/
void purple_network_set_public_ip(const char *ip);
/**
* Returns the IP address of the local system set in preferences.
*
* This returns the value set via purple_network_set_public_ip().
* You probably want to use purple_network_get_my_ip() instead.
*
* @return The local IP address set in preferences.
*/
const char *purple_network_get_public_ip(void);
/**
* Returns the IP address of the local system.
*
* You probably want to use purple_network_get_my_ip() instead.
*
* @note The returned string is a pointer to a static buffer. If this
* function is called twice, it may be important to make a copy
* of the returned string.
*
* @param fd The fd to use to help figure out the IP, or else -1.
* @return The local IP address.
*/
const char *purple_network_get_local_system_ip(int fd);
/**
* Returns the IP address that should be used anywhere a
* public IP addresses is needed (listening for an incoming
* file transfer, etc).
*
* If the user has manually specified an IP address via
* preferences, then this IP is returned. Otherwise the
* IP address returned by purple_network_get_local_system_ip()
* is returned.
*
* @note The returned string is a pointer to a static buffer. If this
* function is called twice, it may be important to make a copy
* of the returned string.
*
* @param fd The fd to use to help figure out the IP, or -1.
* @return The local IP address to be used.
*/
const char *purple_network_get_my_ip(int fd);
/**
* Should calls to purple_network_listen() and purple_network_listen_range()
* map the port externally using NAT-PMP or UPnP?
* The default value is TRUE
*
* @param map_external Should the open port be mapped externally?
* @deprecated In 3.0.0 a boolean will be added to the above functions to
* perform the same function.
* @since 2.3.0
*/
void purple_network_listen_map_external(gboolean map_external);
/**
* Attempts to open a listening port ONLY on the specified port number.
* You probably want to use purple_network_listen_range() instead of this.
* This function is useful, for example, if you wanted to write a telnet
* server as a Purple plugin, and you HAD to listen on port 23. Why anyone
* would want to do that is beyond me.
*
* This opens a listening port. The caller will want to set up a watcher
* of type PURPLE_INPUT_READ on the fd returned in cb. It will probably call
* accept in the watcher callback, and then possibly remove the watcher and close
* the listening socket, and add a new watcher on the new socket accept
* returned.
*
* @param port The port number to bind to. Must be greater than 0.
* @param socket_type The type of socket to open for listening.
* This will be either SOCK_STREAM for TCP or SOCK_DGRAM for UDP.
* @param cb The callback to be invoked when the port to listen on is available.
* The file descriptor of the listening socket will be specified in
* this callback, or -1 if no socket could be established.
* @param cb_data extra data to be returned when cb is called
*
* @return A pointer to a data structure that can be used to cancel
* the pending listener, or NULL if unable to obtain a local
* socket to listen on.
*/
PurpleNetworkListenData *purple_network_listen(unsigned short port,
int socket_type, PurpleNetworkListenCallback cb, gpointer cb_data);
/**
* Opens a listening port selected from a range of ports. The range of
* ports used is chosen in the following manner:
* If a range is specified in preferences, these values are used.
* If a non-0 values are passed to the function as parameters, these
* values are used.
* Otherwise a port is chosen at random by the operating system.
*
* This opens a listening port. The caller will want to set up a watcher
* of type PURPLE_INPUT_READ on the fd returned in cb. It will probably call
* accept in the watcher callback, and then possibly remove the watcher and close
* the listening socket, and add a new watcher on the new socket accept
* returned.
*
* @param start The port number to bind to, or 0 to pick a random port.
* Users are allowed to override this arg in prefs.
* @param end The highest possible port in the range of ports to listen on,
* or 0 to pick a random port. Users are allowed to override this
* arg in prefs.
* @param socket_type The type of socket to open for listening.
* This will be either SOCK_STREAM for TCP or SOCK_DGRAM for UDP.
* @param cb The callback to be invoked when the port to listen on is available.
* The file descriptor of the listening socket will be specified in
* this callback, or -1 if no socket could be established.
* @param cb_data extra data to be returned when cb is called
*
* @return A pointer to a data structure that can be used to cancel
* the pending listener, or NULL if unable to obtain a local
* socket to listen on.
*/
PurpleNetworkListenData *purple_network_listen_range(unsigned short start,
unsigned short end, int socket_type,
PurpleNetworkListenCallback cb, gpointer cb_data);
/**
* This can be used to cancel any in-progress listener connection
* by passing in the return value from either purple_network_listen()
* or purple_network_listen_range().
*
* @param listen_data This listener attempt will be canceled and
* the struct will be freed.
*/
void purple_network_listen_cancel(PurpleNetworkListenData *listen_data);
/**
* Gets a port number from a file descriptor.
*
* @param fd The file descriptor. This should be a tcp socket. The current
* implementation probably dies on anything but IPv4. Perhaps this
* possible bug will inspire new and valuable contributors to Purple.
* @return The port number, in host byte order.
*/
unsigned short purple_network_get_port_from_fd(int fd);
/**
* Detects if there is an available network connection.
*
* @return TRUE if the network is available
*/
gboolean purple_network_is_available(void);
/**
* Get the handle for the network system
*
* @return the handle to the network system
*/
void *purple_network_get_handle(void);
/**
* Initializes the network subsystem.
*/
void purple_network_init(void);
/**
* Shuts down the network subsystem.
*/
void purple_network_uninit(void);
/*@}*/
#ifdef __cplusplus
}
#endif
#endif /* _PURPLE_NETWORK_H_ */
|
