5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
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"
25 /* ID lengths (in bytes) without the IP address part */
26 #define ID_SERVER_LEN_PART 4
27 #define ID_CLIENT_LEN_PART CLIENTID_HASH_LEN + 1
28 #define ID_CHANNEL_LEN_PART 4
30 /******************************************************************************
34 ******************************************************************************/
36 struct SilcIDPayloadStruct {
42 /* Parses buffer and return ID payload into payload structure */
44 SilcIDPayload silc_id_payload_parse(const unsigned char *payload,
45 SilcUInt32 payload_len)
47 SilcBufferStruct buffer;
51 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
52 newp = silc_calloc(1, sizeof(*newp));
56 ret = silc_buffer_unformat(&buffer,
57 SILC_STR_UI_SHORT(&newp->type),
58 SILC_STR_UI_SHORT(&newp->len),
63 if (newp->type > SILC_ID_CHANNEL)
66 silc_buffer_pull(&buffer, 4);
68 if (newp->len > buffer.len || newp->len > SILC_PACKET_MAX_ID_LEN)
71 ret = silc_buffer_unformat(&buffer,
72 SILC_STR_UI_XNSTRING_ALLOC(&newp->id, newp->len),
77 silc_buffer_push(&buffer, 4);
82 SILC_LOG_DEBUG(("Error parsing ID payload"));
87 /* Return the ID directly from the raw payload data. */
89 void *silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len,
92 SilcBufferStruct buffer;
95 unsigned char *id_data;
99 silc_buffer_set(&buffer, (unsigned char *)data, len);
100 ret = silc_buffer_unformat(&buffer,
101 SILC_STR_UI_SHORT(&type),
102 SILC_STR_UI_SHORT(&idlen),
107 if (type > SILC_ID_CHANNEL)
110 silc_buffer_pull(&buffer, 4);
112 if (idlen > buffer.len || idlen > SILC_PACKET_MAX_ID_LEN)
115 ret = silc_buffer_unformat(&buffer,
116 SILC_STR_UI_XNSTRING(&id_data, idlen),
121 id = silc_id_str2id(id_data, idlen, type);
129 SILC_LOG_DEBUG(("Error parsing ID payload"));
133 /* Encodes ID Payload */
135 SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type)
138 unsigned char *id_data;
141 id_data = silc_id_id2str(id, type);
142 len = silc_id_get_len(id, type);
143 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
149 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
150 SilcUInt32 id_len, SilcIdType type)
154 buffer = silc_buffer_alloc_size(4 + id_len);
157 silc_buffer_format(buffer,
158 SILC_STR_UI_SHORT(type),
159 SILC_STR_UI_SHORT(id_len),
160 SILC_STR_UI_XNSTRING(id, id_len),
165 /* Free ID Payload */
167 void silc_id_payload_free(SilcIDPayload payload)
170 silc_free(payload->id);
177 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
179 return payload ? payload->type : 0;
184 void *silc_id_payload_get_id(SilcIDPayload payload)
186 return payload ? silc_id_str2id(payload->id, payload->len,
187 payload->type) : NULL;
190 /* Get raw ID data. Data is duplicated. */
192 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
197 return silc_memdup(payload->id, payload->len);
200 /* Get length of ID */
202 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
204 return payload ? payload->len : 0;
207 /* Converts ID to string. */
209 unsigned char *silc_id_id2str(const void *id, SilcIdType type)
211 unsigned char *ret_id;
212 SilcServerID *server_id;
213 SilcClientID *client_id;
214 SilcChannelID *channel_id;
215 SilcUInt32 id_len = silc_id_get_len(id, type);
217 if (id_len > SILC_PACKET_MAX_ID_LEN)
222 server_id = (SilcServerID *)id;
223 ret_id = silc_calloc(id_len, sizeof(unsigned char));
226 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
227 SILC_PUT16_MSB(server_id->port, &ret_id[server_id->ip.data_len]);
228 SILC_PUT16_MSB(server_id->rnd, &ret_id[server_id->ip.data_len + 2]);
232 client_id = (SilcClientID *)id;
233 ret_id = silc_calloc(id_len, sizeof(unsigned char));
236 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
237 ret_id[client_id->ip.data_len] = client_id->rnd;
238 memcpy(&ret_id[client_id->ip.data_len + 1], client_id->hash,
242 case SILC_ID_CHANNEL:
243 channel_id = (SilcChannelID *)id;
244 ret_id = silc_calloc(id_len, sizeof(unsigned char));
247 memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
248 SILC_PUT16_MSB(channel_id->port, &ret_id[channel_id->ip.data_len]);
249 SILC_PUT16_MSB(channel_id->rnd, &ret_id[channel_id->ip.data_len + 2]);
257 /* Converts string to a ID */
259 void *silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
262 if (id_len > SILC_PACKET_MAX_ID_LEN)
268 SilcServerID *server_id;
270 if (id_len != ID_SERVER_LEN_PART + 4 &&
271 id_len != ID_SERVER_LEN_PART + 16)
274 server_id = silc_calloc(1, sizeof(*server_id));
277 memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
279 server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
280 SILC_GET16_MSB(server_id->port, &id[server_id->ip.data_len]);
281 SILC_GET16_MSB(server_id->rnd, &id[server_id->ip.data_len + 2]);
287 SilcClientID *client_id;
289 if (id_len != ID_CLIENT_LEN_PART + 4 &&
290 id_len != ID_CLIENT_LEN_PART + 16)
293 client_id = silc_calloc(1, sizeof(*client_id));
296 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
298 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
299 client_id->rnd = id[client_id->ip.data_len];
300 memcpy(client_id->hash, &id[client_id->ip.data_len + 1],
305 case SILC_ID_CHANNEL:
307 SilcChannelID *channel_id;
309 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
310 id_len != ID_CHANNEL_LEN_PART + 16)
313 channel_id = silc_calloc(1, sizeof(*channel_id));
316 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
318 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
319 SILC_GET16_MSB(channel_id->port, &id[channel_id->ip.data_len]);
320 SILC_GET16_MSB(channel_id->rnd, &id[channel_id->ip.data_len + 2]);
329 /* Returns length of the ID */
331 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
336 SilcServerID *server_id = (SilcServerID *)id;
337 return ID_SERVER_LEN_PART + server_id->ip.data_len;
342 SilcClientID *client_id = (SilcClientID *)id;
343 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
346 case SILC_ID_CHANNEL:
348 SilcChannelID *channel_id = (SilcChannelID *)id;
349 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
357 /* Duplicate ID data */
359 void *silc_id_dup(const void *id, SilcIdType type)
364 SilcServerID *server_id = (SilcServerID *)id;
365 return silc_memdup(server_id, sizeof(*server_id));
370 SilcClientID *client_id = (SilcClientID *)id;
371 return silc_memdup(client_id, sizeof(*client_id));
374 case SILC_ID_CHANNEL:
376 SilcChannelID *channel_id = (SilcChannelID *)id;
377 return silc_memdup(channel_id, sizeof(*channel_id));