5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2000 - 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.
21 /****h* silccore/SilcGenericPayloadAPI
25 * Implementation of the generic payloads described in the protocol
26 * specification; ID Payload and Argument Payload. The ID Payload is
27 * used to represent an ID. The Argument Payload is used to include
28 * arguments to other payloads that needs arguments.
35 /****s* silccore/SilcGenericPayloadAPI/SilcIDPayload
39 * typedef struct SilcIDPayloadStruct *SilcIDPayload;
43 * This context is the actual ID Payload and is allocated by
44 * silc_id_payload_parse and given as argument usually to all
45 * silc_id_payload_* functions. It is freed by the function
46 * silc_id_payload_free.
49 typedef struct SilcIDPayloadStruct *SilcIDPayload;
51 /****s* silccore/SilcGenericPayloadAPI/SilcArgumentPayload
55 * typedef struct SilcArgumentPayloadStruct *SilcArgumentPayload;
59 * This context is the actual Argument Payload and is allocated
60 * by silc_argument_payload_parse and given as argument usually to
61 * all silc_argument_payload_* functions. It is freed by the
62 * silc_argument_payload_free function.
65 typedef struct SilcArgumentPayloadStruct *SilcArgumentPayload;
69 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_parse
73 * SilcIDPayload silc_id_payload_parse(SilcBuffer buffer);
77 * Parses buffer and return ID payload into payload structure. The
78 * `buffer' is raw payload buffer.
81 SilcIDPayload silc_id_payload_parse(SilcBuffer buffer);
83 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_parse_data
87 * SilcIDPayload silc_id_payload_parse_data(unsigned char *data,
92 * Parses buffer and return ID payload into payload structure. The
93 * `data' and `len' are the raw payload buffer. This is equivalent
94 * to the silc_id_payload_parse function.
97 SilcIDPayload silc_id_payload_parse_data(unsigned char *data,
100 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_parse_id
104 * void *silc_id_payload_parse_id(unsigned char *data, uint32 len);
108 * Return ID directly from the raw ID Payload data buffer. The
109 * caller must free the returned ID.
112 void *silc_id_payload_parse_id(unsigned char *data, uint32 len);
114 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_encode
118 * SilcBuffer silc_id_payload_encode(void *id, SilcIdType type);
122 * Encodes ID Payload. The `id' is the ID of the type `type' to put
123 * into the payload. Returns the encoded payload buffer.
126 SilcBuffer silc_id_payload_encode(void *id, SilcIdType type);
128 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_encode_data
132 * SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
133 * uin32 id_len, SilcIdType type);
137 * Encodes ID Payload. The `id' is raw ID data of the length of `id_len'
138 * of type of `type'. Returns the encoded payload buffer.
141 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
142 uint32 id_len, SilcIdType type);
144 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_free
148 * void silc_id_payload_free(SilcIDPayload payload);
152 * Frees the ID Payload and all data in it.
155 void silc_id_payload_free(SilcIDPayload payload);
157 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_get_type
161 * SilcIdType silc_id_payload_get_type(SilcIDPayload payload);
165 * Returns the ID type from the ID Payload. The type tells the
166 * type of the ID in the payload.
169 SilcIdType silc_id_payload_get_type(SilcIDPayload payload);
171 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_get_id
175 * void *silc_id_payload_get_id(SilcIDPayload payload);
179 * Returns the ID in the ID Payload. The caller must free the
183 void *silc_id_payload_get_id(SilcIDPayload payload);
185 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_get_data
189 * unsigned char *silc_id_payload_get_data(SilcIDPayload payload);
193 * Returns the raw ID data from the ID Payload. The data is duplicated
194 * and the caller must free it.
197 unsigned char *silc_id_payload_get_data(SilcIDPayload payload);
199 /****f* silccore/SilcGenericPayloadAPI/silc_id_payload_get_len
203 * uint32 silc_id_payload_get_len(SilcIDPayload payload);
207 * Returns the length of the ID in the ID Payload.
210 uint32 silc_id_payload_get_len(SilcIDPayload payload);
212 /****f* silccore/SilcGenericPayloadAPI/silc_argument_payload_parse
216 * SilcArgumentPayload silc_argument_payload_parse(SilcBuffer buffer,
221 * Parses arguments and returns them into Argument Payload structure.
222 * the `buffer' is raw Argument Payload data buffer. The `argc' is
223 * the number of arguments in the Argument Payload. The caller must
224 * know the number of the arguments. This is always known as the
225 * Argument payload is associated with other payloads which defines
226 * the number of the arguments.
229 SilcArgumentPayload silc_argument_payload_parse(SilcBuffer buffer,
232 /****f* silccore/SilcGenericPayloadAPI/silc_argument_payload_encode
236 * SilcBuffer silc_argument_payload_encode(uint32 argc,
237 * unsigned char **argv,
239 * uint32 *argv_types);
243 * Encodes arguments in to Argument Paylods returning them to SilcBuffer.
244 * The `argv' is the array of the arguments, the `argv_lens' array of
245 * the length of the `argv' arguments and the `argv_types' array of
246 * the argument types of the `argv' arguments. The `argc' is the
247 * number of arguments.
250 SilcBuffer silc_argument_payload_encode(uint32 argc,
251 unsigned char **argv,
255 /****f* silccore/SilcGenericPayloadAPI/silc_argument_payload_encode_payload
260 * silc_argument_payload_encode_payload(SilcArgumentPayload payload);
264 * Same as silc_argument_payload_encode but encodes the payload from
265 * already allocated SilcArgumentPayload structure instead of raw data.
268 SilcBuffer silc_argument_payload_encode_payload(SilcArgumentPayload payload);
270 /****f* silccore/SilcGenericPayloadAPI/silc_argument_payload_free
274 * void silc_argument_payload_free(SilcArgumentPayload payload);
278 * Frees the Argument Payload and all data in it.
281 void silc_argument_payload_free(SilcArgumentPayload payload);
283 /****f* silccore/SilcGenericPayloadAPI/silc_argument_get_arg_num
287 * uint32 silc_argument_get_arg_num(SilcArgumentPayload payload);
291 * Returns the number of argument in the Argument Payload.
294 uint32 silc_argument_get_arg_num(SilcArgumentPayload payload);
296 /****f* silccore/SilcGenericPayloadAPI/silc_argument_get_first_arg
300 * unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
305 * Returns the first argument in the Argument Payload. The lenght
306 * of the argument is returned to `ret_len'. The caller must not
307 * free the returned argument. Returns NULL on error.
310 unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
313 /****f* silccore/SilcGenericPayloadAPI/silc_argument_get_next_arg
317 * unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
322 * Returns next argument from the Argument Payload. The length of
323 * the argument is returned to `ret_len'. The caller must not free
324 * the returned argument. This returns NULL when there are no more
325 * arguments in the payload.
328 unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
331 /****f* silccore/SilcGenericPayloadAPI/silc_argument_get_arg_type
335 * unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,
341 * Returns argument by type. The returned argument has type `type'
342 * in the Argument Payload. Each argument has their own type (or zero
343 * if no specific type is set). The length of the argument is returned
344 * to the `ret_len'. The caller must not free the returned argument.
345 * Returns NULL on error.
348 unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,