5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 2000 Pekka Riikonen
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; either version 2 of the License, or
12 (at your option) any later version.
14 This program 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
17 GNU General Public License for more details.
20 /* Implementation of generic payloads described in the protocol
21 specification drafts. */
24 #include "silcincludes.h"
25 #include "silcpayload.h"
27 /******************************************************************************
31 ******************************************************************************/
33 struct SilcIDPayloadStruct {
39 /* Parses buffer and return ID payload into payload structure */
41 SilcIDPayload silc_id_payload_parse(SilcBuffer buffer)
46 SILC_LOG_DEBUG(("Parsing ID payload"));
48 new = silc_calloc(1, sizeof(*new));
50 ret = silc_buffer_unformat(buffer,
51 SILC_STR_UI_SHORT(&new->type),
52 SILC_STR_UI_SHORT(&new->len),
57 silc_buffer_pull(buffer, 4);
59 if (new->len > buffer->len)
62 ret = silc_buffer_unformat(buffer,
63 SILC_STR_UI_XNSTRING_ALLOC(&new->id, new->len),
68 silc_buffer_push(buffer, 4);
77 /* Parses data and return ID payload into payload structure. */
79 SilcIDPayload silc_id_payload_parse_data(unsigned char *data,
86 SILC_LOG_DEBUG(("Parsing ID payload"));
88 buffer = silc_buffer_alloc(len);
89 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
90 silc_buffer_put(buffer, data, len);
92 new = silc_calloc(1, sizeof(*new));
94 ret = silc_buffer_unformat(buffer,
95 SILC_STR_UI_SHORT(&new->type),
96 SILC_STR_UI_SHORT(&new->len),
101 silc_buffer_pull(buffer, 4);
103 if (new->len > buffer->len)
106 ret = silc_buffer_unformat(buffer,
107 SILC_STR_UI_XNSTRING_ALLOC(&new->id, new->len),
112 silc_buffer_free(buffer);
116 silc_buffer_free(buffer);
121 /* Return the ID directly from the raw payload data. */
123 void *silc_id_payload_parse_id(unsigned char *data, unsigned int len)
127 unsigned short idlen;
131 buffer = silc_buffer_alloc(len);
132 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
133 silc_buffer_put(buffer, data, len);
135 ret = silc_buffer_unformat(buffer,
136 SILC_STR_UI_SHORT(&type),
137 SILC_STR_UI_SHORT(&idlen),
142 silc_buffer_pull(buffer, 4);
144 if (idlen > buffer->len)
147 ret = silc_buffer_unformat(buffer,
148 SILC_STR_UI_XNSTRING_ALLOC(&id, idlen),
153 silc_buffer_free(buffer);
155 return silc_id_str2id(id, idlen, type);
158 silc_buffer_free(buffer);
162 /* Encodes ID Payload */
164 SilcBuffer silc_id_payload_encode(void *id, SilcIdType type)
167 unsigned char *id_data;
170 SILC_LOG_DEBUG(("Parsing ID payload"));
172 id_data = silc_id_id2str(id, type);
173 len = silc_id_get_len(type);
175 buffer = silc_buffer_alloc(4 + len);
176 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
177 silc_buffer_format(buffer,
178 SILC_STR_UI_SHORT(type),
179 SILC_STR_UI_SHORT(len),
180 SILC_STR_UI_XNSTRING(id_data, len),
187 /* Free ID Payload */
189 void silc_id_payload_free(SilcIDPayload payload)
192 silc_free(payload->id);
198 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
200 return payload->type;
205 void *silc_id_payload_get_id(SilcIDPayload payload)
207 return silc_id_str2id(payload->id, payload->len, payload->type);
210 /* Get raw ID data. Data is duplicated. */
212 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
214 unsigned char *ret = silc_calloc(payload->len, sizeof(*ret));
215 memcpy(ret, payload->id, payload->len);
219 /* Get length of ID */
221 unsigned int silc_id_payload_get_len(SilcIDPayload payload)
226 /******************************************************************************
230 ******************************************************************************/
232 struct SilcArgumentPayloadStruct {
234 unsigned char **argv;
235 unsigned int *argv_lens;
236 unsigned int *argv_types;
240 /* Parses arguments and returns them into Argument Payload structure. */
242 SilcArgumentPayload silc_argument_payload_parse(SilcBuffer buffer,
245 SilcArgumentPayload new;
246 unsigned short payload_len = 0;
247 unsigned char arg_num = 0;
248 unsigned char arg_type = 0;
249 unsigned int pull_len = 0;
252 SILC_LOG_DEBUG(("Parsing argument payload"));
254 new = silc_calloc(1, sizeof(*new));
255 new->argv = silc_calloc(argc, sizeof(unsigned char *));
256 new->argv_lens = silc_calloc(argc, sizeof(unsigned int));
257 new->argv_types = silc_calloc(argc, sizeof(unsigned int));
261 for (i = 0; i < argc; i++) {
262 ret = silc_buffer_unformat(buffer,
263 SILC_STR_UI_SHORT(&payload_len),
264 SILC_STR_UI_CHAR(&arg_type),
269 new->argv_lens[i] = payload_len;
270 new->argv_types[i] = arg_type;
272 if (payload_len > buffer->len)
275 /* Get argument data */
276 silc_buffer_pull(buffer, 3);
277 ret = silc_buffer_unformat(buffer,
278 SILC_STR_UI_XNSTRING_ALLOC(&new->argv[i],
284 silc_buffer_pull(buffer, payload_len);
285 pull_len += 3 + payload_len;
288 if (buffer->len != 0)
294 silc_buffer_push(buffer, pull_len);
302 for (k = 0; k < i; k++)
303 silc_free(new->argv[k]);
306 silc_free(new->argv);
307 silc_free(new->argv_lens);
308 silc_free(new->argv_types);
316 /* Encodes arguments in to Argument Paylods returning them to SilcBuffer. */
318 SilcBuffer silc_argument_payload_encode(unsigned int argc,
319 unsigned char **argv,
320 unsigned int *argv_lens,
321 unsigned int *argv_types)
327 SILC_LOG_DEBUG(("Encoding Argument payload"));
330 for (i = 0; i < argc; i++)
331 len += 3 + argv_lens[i];
333 buffer = silc_buffer_alloc(len);
334 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
337 for (i = 0; i < argc; i++) {
338 silc_buffer_format(buffer,
339 SILC_STR_UI_SHORT(argv_lens[i]),
340 SILC_STR_UI_CHAR(argv_types[i]),
341 SILC_STR_UI_XNSTRING(argv[i], argv_lens[i]),
343 silc_buffer_pull(buffer, 3 + argv_lens[i]);
346 silc_buffer_push(buffer, len);
351 /* Same as above but encode the buffer from SilcArgumentPayload structure
352 instead of raw data. */
354 SilcBuffer silc_argument_payload_encode_payload(SilcArgumentPayload payload)
360 SILC_LOG_DEBUG(("Encoding Argument payload"));
363 for (i = 0; i < payload->argc; i++)
364 len += 3 + payload->argv_lens[i];
366 buffer = silc_buffer_alloc(len);
367 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
370 for (i = 0; i < payload->argc; i++) {
371 silc_buffer_format(buffer,
372 SILC_STR_UI_SHORT(payload->argv_lens[i]),
373 SILC_STR_UI_CHAR(payload->argv_types[i]),
374 SILC_STR_UI_XNSTRING(payload->argv[i],
375 payload->argv_lens[i]),
377 silc_buffer_pull(buffer, 3 + payload->argv_lens[i]);
380 silc_buffer_push(buffer, len);
385 /* Free's Command Payload */
387 void silc_argument_payload_free(SilcArgumentPayload payload)
392 for (i = 0; i < payload->argc; i++)
393 silc_free(payload->argv[i]);
395 silc_free(payload->argv);
400 /* Returns number of arguments in payload */
402 unsigned int silc_argument_get_arg_num(SilcArgumentPayload payload)
404 return payload->argc;
407 /* Returns first argument from payload. */
409 unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
410 unsigned int *ret_len)
415 *ret_len = payload->argv_lens[payload->pos];
417 return payload->argv[payload->pos++];
420 /* Returns next argument from payload or NULL if no more arguments. */
422 unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
423 unsigned int *ret_len)
425 if (payload->pos >= payload->argc)
429 *ret_len = payload->argv_lens[payload->pos];
431 return payload->argv[payload->pos++];
434 /* Returns argument which type is `type'. */
436 unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,
438 unsigned int *ret_len)
442 for (i = 0; i < payload->argc; i++)
443 if (payload->argv_types[i] == type)
446 if (i >= payload->argc)
450 *ret_len = payload->argv_lens[i];
452 return payload->argv[i];