5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 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.
22 #include "silcincludes.h"
23 #include "silccommand.h"
25 /******************************************************************************
29 ******************************************************************************/
31 /* Command Payload structure. Contents of this structure is parsed
33 struct SilcCommandPayloadStruct {
36 SilcArgumentPayload args;
39 /* Length of the command payload */
40 #define SILC_COMMAND_PAYLOAD_LEN 6
42 /* Parses command payload returning new command payload structure */
44 SilcCommandPayload silc_command_payload_parse(SilcBuffer buffer)
46 SilcCommandPayload new;
47 unsigned char args_num;
51 SILC_LOG_DEBUG(("Parsing command payload"));
53 new = silc_calloc(1, sizeof(*new));
55 /* Parse the Command Payload */
56 ret = silc_buffer_unformat(buffer,
57 SILC_STR_UI_SHORT(&payload_len),
58 SILC_STR_UI_CHAR(&new->cmd),
59 SILC_STR_UI_CHAR(&args_num),
60 SILC_STR_UI_SHORT(&new->ident),
67 if (payload_len != buffer->len) {
68 SILC_LOG_ERROR(("Incorrect command payload in packet, packet dropped"));
78 silc_buffer_pull(buffer, SILC_COMMAND_PAYLOAD_LEN);
80 new->args = silc_argument_payload_parse(buffer, args_num);
86 silc_buffer_push(buffer, SILC_COMMAND_PAYLOAD_LEN);
91 /* Encodes Command Payload returning it to SilcBuffer. */
93 SilcBuffer silc_command_payload_encode(SilcCommand cmd,
101 SilcBuffer args = NULL;
104 SILC_LOG_DEBUG(("Encoding command payload"));
107 args = silc_argument_payload_encode(argc, argv, argv_lens, argv_types);
111 len += SILC_COMMAND_PAYLOAD_LEN;
112 buffer = silc_buffer_alloc(len);
113 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
115 /* Create Command payload */
116 silc_buffer_format(buffer,
117 SILC_STR_UI_SHORT(len),
118 SILC_STR_UI_CHAR(cmd),
119 SILC_STR_UI_CHAR(argc),
120 SILC_STR_UI_SHORT(ident),
125 silc_buffer_pull(buffer, SILC_COMMAND_PAYLOAD_LEN);
126 silc_buffer_format(buffer,
127 SILC_STR_UI_XNSTRING(args->data, args->len),
129 silc_buffer_push(buffer, SILC_COMMAND_PAYLOAD_LEN);
136 /* Same as above but encode the buffer from SilcCommandPayload structure
137 instead of raw data. */
139 SilcBuffer silc_command_payload_encode_payload(SilcCommandPayload payload)
142 SilcBuffer args = NULL;
146 SILC_LOG_DEBUG(("Encoding command payload"));
149 args = silc_argument_payload_encode_payload(payload->args);
151 argc = silc_argument_get_arg_num(payload->args);
154 len += SILC_COMMAND_PAYLOAD_LEN;
155 buffer = silc_buffer_alloc(len);
156 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
158 /* Create Command payload */
159 silc_buffer_format(buffer,
160 SILC_STR_UI_SHORT(len),
161 SILC_STR_UI_CHAR(payload->cmd),
162 SILC_STR_UI_CHAR(argc),
163 SILC_STR_UI_SHORT(payload->ident),
168 silc_buffer_pull(buffer, SILC_COMMAND_PAYLOAD_LEN);
169 silc_buffer_format(buffer,
170 SILC_STR_UI_XNSTRING(args->data, args->len),
172 silc_buffer_push(buffer, SILC_COMMAND_PAYLOAD_LEN);
179 /* Encodes Command payload with variable argument list. The arguments
180 must be: uint32, unsigned char *, unsigned int, ... One
181 {uint32, unsigned char * and unsigned int} forms one argument,
182 thus `argc' in case when sending one {uint32, unsigned char *
183 and uint32} equals one (1) and when sending two of those it
184 equals two (2), and so on. This has to be preserved or bad things
185 will happen. The variable arguments is: {type, data, data_len}. */
187 SilcBuffer silc_command_payload_encode_va(SilcCommand cmd,
195 buffer = silc_command_payload_encode_vap(cmd, ident, argc, ap);
201 /* Same as above but with va_list. */
203 SilcBuffer silc_command_payload_encode_vap(SilcCommand cmd,
205 uint32 argc, va_list ap)
207 unsigned char **argv;
208 uint32 *argv_lens = NULL, *argv_types = NULL;
215 argv = silc_calloc(argc, sizeof(unsigned char *));
216 argv_lens = silc_calloc(argc, sizeof(uint32));
217 argv_types = silc_calloc(argc, sizeof(uint32));
219 for (i = 0, k = 0; i < argc; i++) {
220 x_type = va_arg(ap, uint32);
221 x = va_arg(ap, unsigned char *);
222 x_len = va_arg(ap, uint32);
224 if (!x_type || !x || !x_len)
227 argv[k] = silc_calloc(x_len + 1, sizeof(unsigned char));
228 memcpy(argv[k], x, x_len);
229 argv_lens[k] = x_len;
230 argv_types[k] = x_type;
234 buffer = silc_command_payload_encode(cmd, k, argv, argv_lens,
237 for (i = 0; i < k; i++)
240 silc_free(argv_lens);
241 silc_free(argv_types);
246 /* Same as above except that this is used to encode strictly command
247 reply packets. The command status message to be returned is sent as
248 extra argument to this function. The `argc' must not count `status'
252 silc_command_reply_payload_encode_va(SilcCommand cmd,
253 SilcCommandStatus status,
261 buffer = silc_command_reply_payload_encode_vap(cmd, status, ident, argc, ap);
268 silc_command_reply_payload_encode_vap(SilcCommand cmd,
269 SilcCommandStatus status,
270 uint16 ident, uint32 argc,
273 unsigned char **argv;
274 uint32 *argv_lens = NULL, *argv_types = NULL;
275 unsigned char status_data[2];
283 argv = silc_calloc(argc, sizeof(unsigned char *));
284 argv_lens = silc_calloc(argc, sizeof(uint32));
285 argv_types = silc_calloc(argc, sizeof(uint32));
287 SILC_PUT16_MSB(status, status_data);
288 argv[0] = silc_calloc(sizeof(status_data) + 1, sizeof(unsigned char));
289 memcpy(argv[0], status_data, sizeof(status_data));
290 argv_lens[0] = sizeof(status_data);
293 for (i = 1, k = 1; i < argc; i++) {
294 x_type = va_arg(ap, uint32);
295 x = va_arg(ap, unsigned char *);
296 x_len = va_arg(ap, uint32);
298 if (!x_type || !x || !x_len)
301 argv[k] = silc_calloc(x_len + 1, sizeof(unsigned char));
302 memcpy(argv[k], x, x_len);
303 argv_lens[k] = x_len;
304 argv_types[k] = x_type;
308 buffer = silc_command_payload_encode(cmd, k, argv, argv_lens,
311 for (i = 0; i < k; i++)
314 silc_free(argv_lens);
315 silc_free(argv_types);
320 /* Frees Command Payload */
322 void silc_command_payload_free(SilcCommandPayload payload)
325 silc_argument_payload_free(payload->args);
330 /* Returns command */
332 SilcCommand silc_command_get(SilcCommandPayload payload)
337 /* Retuns arguments payload */
339 SilcArgumentPayload silc_command_get_args(SilcCommandPayload payload)
341 return payload->args;
344 /* Returns identifier */
346 uint16 silc_command_get_ident(SilcCommandPayload payload)
348 return payload->ident;
351 /* Function to set identifier to already allocated Command Payload. Command
352 payloads are frequentlly resent in SILC and thusly this makes it easy
353 to set the identifier. */
355 void silc_command_set_ident(SilcCommandPayload payload, uint16 ident)
357 payload->ident = ident;
360 /* Function to set the command to already allocated Command Payload. */
362 void silc_command_set_command(SilcCommandPayload payload, SilcCommand command)
364 payload->cmd = command;