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
234
235
236
237
238
239
240
241
242
243
|
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <strophe.h>
#include "gui.h"
#include "net.h"
#include "data.h"
// the state of net
typedef enum {
DISCONNECTED, // initial state
CONNECTING, // connection was requested but is not yet established
CONNECTED, // there is an active XMPP connetion to the server
SUSPENDED // not connected, but there is an open XMPP stream to be
// reconnected (see XEP-0198 for details)
} net_state_t;
// these variables stay initialized for the whole runtime
static net_state_t state;
static xmpp_log_t* log;
static xmpp_ctx_t* ctx;
// these variables stay initialized while the application is not disconnected
static xmpp_conn_t* conn;
static long flags;
// this variable stays initialized while the connection is suspended
static xmpp_sm_state_t* sm_state;
static int message_handler(xmpp_conn_t* conn, xmpp_stanza_t* stanza,
void* userdata) {
xmpp_stanza_t* body = xmpp_stanza_get_child_by_name(stanza, "body");
if (body == NULL) {
fprintf(stderr, "DEBUG: Got message stanza of type char without body!\n");
return 1;
}
const char* content = xmpp_stanza_get_text(body);
const char* sender = xmpp_stanza_get_from(stanza);
data_add_incoming_message(sender, content);
return 1;
}
static int roster_handler(xmpp_conn_t *conn, xmpp_stanza_t *stanza,
void *userdata) {
// iterate over roster result
xmpp_stanza_t* query = xmpp_stanza_get_child_by_name(stanza, "query");
for (xmpp_stanza_t* item = xmpp_stanza_get_children(query); item;
item = xmpp_stanza_get_next(item)) {
data_add_roster_item(xmpp_stanza_get_attribute(item, "jid"),
xmpp_stanza_get_attribute(item, "subscription"),
xmpp_stanza_get_attribute(item, "name"));
}
return 1;
}
static void conn_handler(xmpp_conn_t* conn, xmpp_conn_event_t status,int error,
xmpp_stream_error_t* stream_error, void* userdata) {
// FIXME handle error and stream_error (this could be a major bug)
// this implements at least debugging:
if (error != 0) {
fprintf(stderr, "conn_handler got error=%d\n", error);
}
if (stream_error != NULL) {
fprintf(stderr, "conn_handler got stream_error of type %d\n",
stream_error->type);
}
switch (status) {
case XMPP_CONN_CONNECT:
fprintf(stderr, "DEBUG: Got XMPP_CONN_CONNECT\n");
// add handler for <message> stanzas
xmpp_handler_add(conn, message_handler, NULL, "message", "chat",
NULL);
// add handler for roster response
xmpp_handler_add(conn, roster_handler, "jabber:iq:roster", "iq",
"result", NULL);
// send initial presence
xmpp_stanza_t* presence;
presence = xmpp_presence_new(ctx);
xmpp_send(conn, presence);
xmpp_stanza_release(presence);
// send roster request
xmpp_stanza_t* iq = xmpp_iq_new(ctx, "get", "initial_roster");
xmpp_stanza_t* query = xmpp_stanza_new(ctx);
xmpp_stanza_set_name(query, "query");
xmpp_stanza_set_ns(query, XMPP_NS_ROSTER);
xmpp_stanza_add_child(iq, query);
xmpp_stanza_release(query);
xmpp_send(conn, iq);
xmpp_stanza_release(iq);
break;
case XMPP_CONN_RAW_CONNECT:
fprintf(stderr, "DEBUG: Got XMPP_CONN_RAW_CONNECT\n");
break;
case XMPP_CONN_DISCONNECT:
fprintf(stderr, "DEBUG: Got XMPP_CONN_DISCONNECT\n");
break;
case XMPP_CONN_FAIL:
fprintf(stderr, "DEBUG: Got XMPP_CONN_FAIL\n");
break;
default:
fprintf(stderr, "DEBUG: Got unknown connection status '%d'!\n", status);
exit(1);
}
}
void net_init(void) {
fprintf(stderr, "net_init()\n");
xmpp_initialize();
log = xmpp_get_default_logger(XMPP_LEVEL_DEBUG); // or NULL for silence
ctx = xmpp_ctx_new(NULL, log);
state = DISCONNECTED;
}
static void delay(unsigned long int micros) {
unsigned long int now = clock();
while ((clock() - now) < micros) {}
}
void net_run_once(void) {
if (state == CONNECTING) {
if (xmpp_connect_client(conn, NULL, 0, conn_handler, NULL)
== XMPP_EOK) {
state = CONNECTED;
} else {
net_disconnect();
}
}
if (state != DISCONNECTED) {
xmpp_run_once(ctx, 200);
}
// TODO This delay is useless. But without it this function gets only
// called once by GTK. This could be a GTK bug.
delay(10000);
}
void net_quit(void) {
fprintf(stderr, "net_quit()\n");
net_disconnect();
// TODO is it possible to free xmpp_log_t ?
log = NULL;
xmpp_ctx_free(ctx);
xmpp_shutdown();
}
void net_connect(const char* jid, const char* password) {
fprintf(stderr, "net_connect()\n");
conn = xmpp_conn_new(ctx);
flags = 0;
flags |= XMPP_CONN_FLAG_MANDATORY_TLS;
xmpp_conn_set_flags(conn, flags);
xmpp_conn_set_jid(conn, jid);
xmpp_conn_set_pass(conn, password);
state = CONNECTING;
}
void net_disconnect(void) {
fprintf(stderr, "net_disconnect()\n");
if (sm_state) {
xmpp_free_sm_state(sm_state);
sm_state = NULL;
}
if (conn != NULL && xmpp_conn_is_connected(conn)) {
xmpp_disconnect(conn);
while (xmpp_conn_is_connected(conn)) {
xmpp_run_once(ctx, 200); // TODO avoid with additional
// state "disconnecting"
}
if (!xmpp_conn_release(conn)) {
fprintf(stderr, "DEBUG: Could not free connection!\n");
}
}
flags = 0;
state = DISCONNECTED;
}
void net_send_message(const char* sender, const char* content,
const char* recipient) {
// TODO what happens if client is disconnected and this function is called?
char* uuid = xmpp_uuid_gen(ctx);
xmpp_stanza_t* msg = xmpp_message_new(ctx, "chat", recipient, uuid);
xmpp_stanza_set_from(msg, sender);
xmpp_message_set_body(msg, content);
xmpp_send(conn, msg);
xmpp_free(ctx, msg);
xmpp_free(ctx, uuid);
}
|
