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, uint32 len)
128 unsigned char *id_data = NULL;
132 buffer = silc_buffer_alloc(len);
133 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
134 silc_buffer_put(buffer, data, len);
136 ret = silc_buffer_unformat(buffer,
137 SILC_STR_UI_SHORT(&type),
138 SILC_STR_UI_SHORT(&idlen),
143 silc_buffer_pull(buffer, 4);
145 if (idlen > buffer->len)
148 ret = silc_buffer_unformat(buffer,
149 SILC_STR_UI_XNSTRING_ALLOC(&id_data, idlen),
154 silc_buffer_free(buffer);
156 id = silc_id_str2id(id_data, idlen, type);
161 silc_buffer_free(buffer);
165 /* Encodes ID Payload */
167 SilcBuffer silc_id_payload_encode(void *id, SilcIdType type)
170 unsigned char *id_data;
173 SILC_LOG_DEBUG(("Encoding %s ID payload",
174 type == SILC_ID_CLIENT ? "Client" :
175 type == SILC_ID_SERVER ? "Server" : "Channel"));
177 id_data = silc_id_id2str(id, type);
178 len = silc_id_get_len(type);
180 buffer = silc_buffer_alloc(4 + len);
181 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
182 silc_buffer_format(buffer,
183 SILC_STR_UI_SHORT(type),
184 SILC_STR_UI_SHORT(len),
185 SILC_STR_UI_XNSTRING(id_data, len),
192 /* Free ID Payload */
194 void silc_id_payload_free(SilcIDPayload payload)
197 silc_free(payload->id);
204 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
206 return payload ? payload->type : 0;
211 void *silc_id_payload_get_id(SilcIDPayload payload)
213 return payload ? silc_id_str2id(payload->id, payload->len,
214 payload->type) : NULL;
217 /* Get raw ID data. Data is duplicated. */
219 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
226 ret = silc_calloc(payload->len, sizeof(*ret));
227 memcpy(ret, payload->id, payload->len);
231 /* Get length of ID */
233 uint32 silc_id_payload_get_len(SilcIDPayload payload)
235 return payload ? payload->len : 0;
238 /******************************************************************************
242 ******************************************************************************/
244 struct SilcArgumentPayloadStruct {
246 unsigned char **argv;
252 /* Parses arguments and returns them into Argument Payload structure. */
254 SilcArgumentPayload silc_argument_payload_parse(SilcBuffer buffer,
257 SilcArgumentPayload new;
258 uint16 payload_len = 0;
259 unsigned char arg_num = 0;
260 unsigned char arg_type = 0;
264 SILC_LOG_DEBUG(("Parsing argument payload"));
266 new = silc_calloc(1, sizeof(*new));
267 new->argv = silc_calloc(argc, sizeof(unsigned char *));
268 new->argv_lens = silc_calloc(argc, sizeof(uint32));
269 new->argv_types = silc_calloc(argc, sizeof(uint32));
273 for (i = 0; i < argc; i++) {
274 ret = silc_buffer_unformat(buffer,
275 SILC_STR_UI_SHORT(&payload_len),
276 SILC_STR_UI_CHAR(&arg_type),
281 new->argv_lens[i] = payload_len;
282 new->argv_types[i] = arg_type;
284 if (payload_len > buffer->len - 3)
287 /* Get argument data */
288 silc_buffer_pull(buffer, 3);
289 ret = silc_buffer_unformat(buffer,
290 SILC_STR_UI_XNSTRING_ALLOC(&new->argv[i],
296 silc_buffer_pull(buffer, payload_len);
297 pull_len += 3 + payload_len;
300 if (buffer->len != 0)
306 silc_buffer_push(buffer, pull_len);
314 for (k = 0; k < i; k++)
315 silc_free(new->argv[k]);
318 silc_free(new->argv);
319 silc_free(new->argv_lens);
320 silc_free(new->argv_types);
328 /* Encodes arguments in to Argument Paylods returning them to SilcBuffer. */
330 SilcBuffer silc_argument_payload_encode(uint32 argc,
331 unsigned char **argv,
339 SILC_LOG_DEBUG(("Encoding Argument payload"));
342 for (i = 0; i < argc; i++)
343 len += 3 + argv_lens[i];
345 buffer = silc_buffer_alloc(len);
346 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
349 for (i = 0; i < argc; i++) {
350 silc_buffer_format(buffer,
351 SILC_STR_UI_SHORT(argv_lens[i]),
352 SILC_STR_UI_CHAR(argv_types[i]),
353 SILC_STR_UI_XNSTRING(argv[i], argv_lens[i]),
355 silc_buffer_pull(buffer, 3 + argv_lens[i]);
358 silc_buffer_push(buffer, len);
363 /* Same as above but encode the buffer from SilcArgumentPayload structure
364 instead of raw data. */
366 SilcBuffer silc_argument_payload_encode_payload(SilcArgumentPayload payload)
372 SILC_LOG_DEBUG(("Encoding Argument payload"));
375 for (i = 0; i < payload->argc; i++)
376 len += 3 + payload->argv_lens[i];
378 buffer = silc_buffer_alloc(len);
379 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
382 for (i = 0; i < payload->argc; i++) {
383 silc_buffer_format(buffer,
384 SILC_STR_UI_SHORT(payload->argv_lens[i]),
385 SILC_STR_UI_CHAR(payload->argv_types[i]),
386 SILC_STR_UI_XNSTRING(payload->argv[i],
387 payload->argv_lens[i]),
389 silc_buffer_pull(buffer, 3 + payload->argv_lens[i]);
392 silc_buffer_push(buffer, len);
397 /* Free's Command Payload */
399 void silc_argument_payload_free(SilcArgumentPayload payload)
404 for (i = 0; i < payload->argc; i++)
405 silc_free(payload->argv[i]);
407 silc_free(payload->argv);
408 silc_free(payload->argv_lens);
409 silc_free(payload->argv_types);
414 /* Returns number of arguments in payload */
416 uint32 silc_argument_get_arg_num(SilcArgumentPayload payload)
418 return payload ? payload->argc : 0;
421 /* Returns first argument from payload. */
423 unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
432 *ret_len = payload->argv_lens[payload->pos];
434 return payload->argv[payload->pos++];
437 /* Returns next argument from payload or NULL if no more arguments. */
439 unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
445 if (payload->pos >= payload->argc)
449 *ret_len = payload->argv_lens[payload->pos];
451 return payload->argv[payload->pos++];
454 /* Returns argument which type is `type'. */
456 unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,
465 for (i = 0; i < payload->argc; i++)
466 if (payload->argv_types[i] == type)
469 if (i >= payload->argc)
473 *ret_len = payload->argv_lens[i];
475 return payload->argv[i];