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(("Encoding %s ID payload",
171 type == SILC_ID_CLIENT ? "Client" :
172 type == SILC_ID_SERVER ? "Server" : "Channel"));
174 id_data = silc_id_id2str(id, type);
175 len = silc_id_get_len(type);
177 buffer = silc_buffer_alloc(4 + len);
178 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
179 silc_buffer_format(buffer,
180 SILC_STR_UI_SHORT(type),
181 SILC_STR_UI_SHORT(len),
182 SILC_STR_UI_XNSTRING(id_data, len),
189 /* Free ID Payload */
191 void silc_id_payload_free(SilcIDPayload payload)
194 silc_free(payload->id);
200 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
202 return payload ? payload->type : 0;
207 void *silc_id_payload_get_id(SilcIDPayload payload)
209 return payload ? silc_id_str2id(payload->id, payload->len,
210 payload->type) : NULL;
213 /* Get raw ID data. Data is duplicated. */
215 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
222 ret = silc_calloc(payload->len, sizeof(*ret));
223 memcpy(ret, payload->id, payload->len);
227 /* Get length of ID */
229 unsigned int silc_id_payload_get_len(SilcIDPayload payload)
231 return payload ? payload->len : 0;
234 /******************************************************************************
238 ******************************************************************************/
240 struct SilcArgumentPayloadStruct {
242 unsigned char **argv;
243 unsigned int *argv_lens;
244 unsigned int *argv_types;
248 /* Parses arguments and returns them into Argument Payload structure. */
250 SilcArgumentPayload silc_argument_payload_parse(SilcBuffer buffer,
253 SilcArgumentPayload new;
254 unsigned short payload_len = 0;
255 unsigned char arg_num = 0;
256 unsigned char arg_type = 0;
257 unsigned int pull_len = 0;
260 SILC_LOG_DEBUG(("Parsing argument payload"));
262 new = silc_calloc(1, sizeof(*new));
263 new->argv = silc_calloc(argc, sizeof(unsigned char *));
264 new->argv_lens = silc_calloc(argc, sizeof(unsigned int));
265 new->argv_types = silc_calloc(argc, sizeof(unsigned int));
269 for (i = 0; i < argc; i++) {
270 ret = silc_buffer_unformat(buffer,
271 SILC_STR_UI_SHORT(&payload_len),
272 SILC_STR_UI_CHAR(&arg_type),
277 new->argv_lens[i] = payload_len;
278 new->argv_types[i] = arg_type;
280 if (payload_len > buffer->len - 3)
283 /* Get argument data */
284 silc_buffer_pull(buffer, 3);
285 ret = silc_buffer_unformat(buffer,
286 SILC_STR_UI_XNSTRING_ALLOC(&new->argv[i],
292 silc_buffer_pull(buffer, payload_len);
293 pull_len += 3 + payload_len;
296 if (buffer->len != 0)
302 silc_buffer_push(buffer, pull_len);
310 for (k = 0; k < i; k++)
311 silc_free(new->argv[k]);
314 silc_free(new->argv);
315 silc_free(new->argv_lens);
316 silc_free(new->argv_types);
324 /* Encodes arguments in to Argument Paylods returning them to SilcBuffer. */
326 SilcBuffer silc_argument_payload_encode(unsigned int argc,
327 unsigned char **argv,
328 unsigned int *argv_lens,
329 unsigned int *argv_types)
335 SILC_LOG_DEBUG(("Encoding Argument payload"));
338 for (i = 0; i < argc; i++)
339 len += 3 + argv_lens[i];
341 buffer = silc_buffer_alloc(len);
342 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
345 for (i = 0; i < argc; i++) {
346 silc_buffer_format(buffer,
347 SILC_STR_UI_SHORT(argv_lens[i]),
348 SILC_STR_UI_CHAR(argv_types[i]),
349 SILC_STR_UI_XNSTRING(argv[i], argv_lens[i]),
351 silc_buffer_pull(buffer, 3 + argv_lens[i]);
354 silc_buffer_push(buffer, len);
359 /* Same as above but encode the buffer from SilcArgumentPayload structure
360 instead of raw data. */
362 SilcBuffer silc_argument_payload_encode_payload(SilcArgumentPayload payload)
368 SILC_LOG_DEBUG(("Encoding Argument payload"));
371 for (i = 0; i < payload->argc; i++)
372 len += 3 + payload->argv_lens[i];
374 buffer = silc_buffer_alloc(len);
375 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
378 for (i = 0; i < payload->argc; i++) {
379 silc_buffer_format(buffer,
380 SILC_STR_UI_SHORT(payload->argv_lens[i]),
381 SILC_STR_UI_CHAR(payload->argv_types[i]),
382 SILC_STR_UI_XNSTRING(payload->argv[i],
383 payload->argv_lens[i]),
385 silc_buffer_pull(buffer, 3 + payload->argv_lens[i]);
388 silc_buffer_push(buffer, len);
393 /* Free's Command Payload */
395 void silc_argument_payload_free(SilcArgumentPayload payload)
400 for (i = 0; i < payload->argc; i++)
401 silc_free(payload->argv[i]);
403 silc_free(payload->argv);
408 /* Returns number of arguments in payload */
410 unsigned int silc_argument_get_arg_num(SilcArgumentPayload payload)
412 return payload ? payload->argc : 0;
415 /* Returns first argument from payload. */
417 unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
418 unsigned int *ret_len)
426 *ret_len = payload->argv_lens[payload->pos];
428 return payload->argv[payload->pos++];
431 /* Returns next argument from payload or NULL if no more arguments. */
433 unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
434 unsigned int *ret_len)
439 if (payload->pos >= payload->argc)
443 *ret_len = payload->argv_lens[payload->pos];
445 return payload->argv[payload->pos++];
448 /* Returns argument which type is `type'. */
450 unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,
452 unsigned int *ret_len)
459 for (i = 0; i < payload->argc; i++)
460 if (payload->argv_types[i] == type)
463 if (i >= payload->argc)
467 *ret_len = payload->argv_lens[i];
469 return payload->argv[i];