1 /*
2
3 silcnotify.c
4
5 Author: Pekka Riikonen <priikone@silcnet.org>
6
7 Copyright (C) 2000 - 2007 Pekka Riikonen
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 */
19 /* $Id: silcnotify.c,v 1.24 2007/07/01 16:42:02 priikone Exp $ */
20
21 #include "silc.h"
22 #include "silcnotify.h"
23
24 /******************************************************************************
25
26 Notify Payload
27
28 ******************************************************************************/
29
30 struct SilcNotifyPayloadStruct {
31 SilcNotifyType type;
32 unsigned char argc;
33 SilcArgumentPayload args;
34 };
35
36 /* Parse notify payload buffer and return data into payload structure */
37
38 SilcNotifyPayload silc_notify_payload_parse(const unsigned char *payload,
39 SilcUInt32 payload_len)
40 {
41 SilcBufferStruct buffer;
42 SilcNotifyPayload newp;
43 SilcUInt16 len;
44 int ret;
45
46 SILC_LOG_DEBUG(("Parsing Notify payload"));
47
48 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
49 newp = silc_calloc(1, sizeof(*newp));
50 if (!newp)
51 return NULL;
52
53 ret = silc_buffer_unformat(&buffer,
54 SILC_STR_UI_SHORT(&newp->type),
55 SILC_STR_UI_SHORT(&len),
56 SILC_STR_UI_CHAR(&newp->argc),
57 SILC_STR_END);
58 if (ret == -1)
59 goto err;
60
61 if (len > silc_buffer_len(&buffer))
62 goto err;
63
64 if (newp->argc) {
65 silc_buffer_pull(&buffer, 5);
66 newp->args = silc_argument_payload_parse(buffer.data,
67 silc_buffer_len(&buffer),
68 newp->argc);
69 if (!newp->args)
70 goto err;
71 silc_buffer_push(&buffer, 5);
72 }
73
74 return newp;
75
76 err:
77 silc_free(newp);
78 return NULL;
79 }
80
81 /* Encode notify payload with variable argument list. If `argc' is > 0
82 argument payloads will be associated to the notify payload. Variable
83 arguments must be {usigned char *, SilcUInt32 (len)}. */
84
85 SilcBuffer silc_notify_payload_encode(SilcNotifyType type, SilcUInt32 argc,
86 va_list ap)
87 {
88 SilcBuffer buffer;
89 SilcBuffer args = NULL;
90 unsigned char **argv;
91 SilcUInt32 *argv_lens = NULL, *argv_types = NULL;
92 unsigned char *x;
93 SilcUInt32 x_len, len = 0;
94 int i, k = 0;
95
96 if (argc) {
97 argv = silc_calloc(argc, sizeof(unsigned char *));
98 if (!argv)
99 return NULL;
100 argv_lens = silc_calloc(argc, sizeof(SilcUInt32));
101 if (!argv_lens) {
102 silc_free(argv);
103 return NULL;
104 }
105 argv_types = silc_calloc(argc, sizeof(SilcUInt32));
106 if (!argv_types) {
107 silc_free(argv_lens);
108 silc_free(argv);
109 return NULL;
110 }
111
112 for (i = 0, k = 0; i < argc; i++) {
113 x = va_arg(ap, unsigned char *);
114 x_len = va_arg(ap, SilcUInt32);
115
116 if (!x || !x_len)
117 continue;
118
119 argv[k] = silc_memdup(x, x_len);
120 if (!argv[k])
121 return NULL;
122 argv_lens[k] = x_len;
123 argv_types[k] = i + 1;
124 k++;
125 }
126
127 args = silc_argument_payload_encode(k, argv, argv_lens, argv_types);
128 len = silc_buffer_len(args);
129
130 for (i = 0; i < k; i++)
131 silc_free(argv[i]);
132 silc_free(argv);
133 silc_free(argv_lens);
134 silc_free(argv_types);
135 }
136
137 len += 5;
138 buffer = silc_buffer_alloc_size(len);
139 if (!buffer)
140 return NULL;
141 silc_buffer_format(buffer,
142 SILC_STR_UI_SHORT(type),
143 SILC_STR_UI_SHORT(len),
144 SILC_STR_UI_CHAR(k),
145 SILC_STR_END);
146
147 if (k) {
148 silc_buffer_format(buffer,
149 SILC_STR_OFFSET(5),
150 SILC_STR_DATA(args->data, silc_buffer_len(args)),
151 SILC_STR_END);
152 silc_buffer_free(args);
153 }
154
155 return buffer;
156 }
157
158 /* Same as above but takes argument from the `args' Argument Payload. */
159
160 SilcBuffer silc_notify_payload_encode_args(SilcNotifyType type,
161 SilcUInt32 argc,
162 SilcBuffer args)
163 {
164 SilcBuffer buffer;
165 SilcUInt32 len;
166
167 len = 5 + (args ? silc_buffer_len(args) : 0);
168 buffer = silc_buffer_alloc_size(len);
169 if (!buffer)
170 return NULL;
171 silc_buffer_format(buffer,
172 SILC_STR_UI_SHORT(type),
173 SILC_STR_UI_SHORT(len),
174 SILC_STR_UI_CHAR(argc),
175 SILC_STR_END);
176
177 if (args)
178 silc_buffer_format(buffer,
179 SILC_STR_OFFSET(5),
180 SILC_STR_DATA(args->data, silc_buffer_len(args)),
181 SILC_STR_END);
182
183 return buffer;
184 }
185
186 /* Frees notify payload */
187
188 void silc_notify_payload_free(SilcNotifyPayload payload)
189 {
190 if (payload) {
191 silc_argument_payload_free(payload->args);
192 silc_free(payload);
193 }
194 }
195
196 /* Return notify type */
197
198 SilcNotifyType silc_notify_get_type(SilcNotifyPayload payload)
199 {
200 return payload->type;
201 }
202
203 /* Return argument nums */
204
205 SilcUInt32 silc_notify_get_arg_num(SilcNotifyPayload payload)
206 {
207 return payload->argc;
208 }
209
210 /* Return argument payload */
211
212 SilcArgumentPayload silc_notify_get_args(SilcNotifyPayload payload)
213 {
214 return payload->args;
215 }
216
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