5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2006 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; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
24 /* ID lengths (in bytes) without the IP address part */
25 #define ID_SERVER_LEN_PART 4
26 #define ID_CLIENT_LEN_PART CLIENTID_HASH_LEN + 1
27 #define ID_CHANNEL_LEN_PART 4
29 /******************************************************************************
33 ******************************************************************************/
35 struct SilcIDPayloadStruct {
41 /* Parses buffer and return ID payload into payload structure */
43 SilcIDPayload silc_id_payload_parse(const unsigned char *payload,
44 SilcUInt32 payload_len)
46 SilcBufferStruct buffer;
50 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
51 newp = silc_calloc(1, sizeof(*newp));
55 ret = silc_buffer_unformat(&buffer,
56 SILC_STR_UI_SHORT(&newp->type),
57 SILC_STR_UI_SHORT(&newp->len),
62 if (newp->type > SILC_ID_CHANNEL)
65 silc_buffer_pull(&buffer, 4);
67 if (newp->len > silc_buffer_len(&buffer) ||
68 newp->len > SILC_PACKET_MAX_ID_LEN)
71 ret = silc_buffer_unformat(&buffer,
72 SILC_STR_UI_XNSTRING_ALLOC(&newp->id, newp->len),
80 SILC_LOG_DEBUG(("Error parsing ID payload"));
85 /* Return the ID directly from the raw payload data. */
87 SilcBool silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len,
90 SilcBufferStruct buffer;
93 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 > silc_buffer_len(&buffer) || idlen > SILC_PACKET_MAX_ID_LEN)
115 ret = silc_buffer_unformat(&buffer,
116 SILC_STR_UI_XNSTRING(&id_data, idlen),
123 if (type == SILC_ID_CLIENT) {
124 if (!silc_id_str2id(id_data, idlen, type, &ret_id->u.client_id,
125 sizeof(SilcClientID)))
127 } else if (type == SILC_ID_SERVER) {
128 if (!silc_id_str2id(id_data, idlen, type, &ret_id->u.server_id,
129 sizeof(SilcServerID)))
132 if (!silc_id_str2id(id_data, idlen, type, &ret_id->u.channel_id,
133 sizeof(SilcChannelID)))
140 SILC_LOG_DEBUG(("Error parsing ID payload"));
144 /* Encodes ID Payload */
146 SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type)
149 unsigned char id_data[32];
152 if (!silc_id_id2str(id, type, id_data, sizeof(id_data), &len))
154 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
159 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
160 SilcUInt32 id_len, SilcIdType type)
164 buffer = silc_buffer_alloc_size(4 + id_len);
167 silc_buffer_format(buffer,
168 SILC_STR_UI_SHORT(type),
169 SILC_STR_UI_SHORT(id_len),
170 SILC_STR_UI_XNSTRING(id, id_len),
175 /* Free ID Payload */
177 void silc_id_payload_free(SilcIDPayload payload)
180 silc_free(payload->id);
187 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
189 return payload ? payload->type : 0;
194 SilcBool silc_id_payload_get_id(SilcIDPayload payload, void *ret_id,
195 SilcUInt32 ret_id_len)
199 return silc_id_str2id(payload->id, payload->len, payload->type,
203 /* Get raw ID data. Data is duplicated. */
205 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
210 return silc_memdup(payload->id, payload->len);
213 /* Get length of ID */
215 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
217 return payload ? payload->len : 0;
220 /* Converts ID to string. */
222 SilcBool silc_id_id2str(const void *id, SilcIdType type,
223 unsigned char *ret_id, SilcUInt32 ret_id_size,
224 SilcUInt32 *ret_id_len)
226 SilcServerID *server_id;
227 SilcClientID *client_id;
228 SilcChannelID *channel_id;
229 SilcUInt32 id_len = silc_id_get_len(id, type);
231 if (id_len > ret_id_size)
235 *ret_id_len = id_len;
237 if (id_len > SILC_PACKET_MAX_ID_LEN)
242 server_id = (SilcServerID *)id;
243 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
244 SILC_PUT16_MSB(server_id->port, &ret_id[server_id->ip.data_len]);
245 SILC_PUT16_MSB(server_id->rnd, &ret_id[server_id->ip.data_len + 2]);
249 client_id = (SilcClientID *)id;
250 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
251 ret_id[client_id->ip.data_len] = client_id->rnd;
252 memcpy(&ret_id[client_id->ip.data_len + 1], client_id->hash,
256 case SILC_ID_CHANNEL:
257 channel_id = (SilcChannelID *)id;
258 memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
259 SILC_PUT16_MSB(channel_id->port, &ret_id[channel_id->ip.data_len]);
260 SILC_PUT16_MSB(channel_id->rnd, &ret_id[channel_id->ip.data_len + 2]);
268 /* Converts string to a ID */
270 SilcBool silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
271 SilcIdType type, void *ret_id, SilcUInt32 ret_id_size)
273 if (id_len > SILC_PACKET_MAX_ID_LEN)
279 SilcServerID *server_id = ret_id;
281 if (id_len != ID_SERVER_LEN_PART + 4 &&
282 id_len != ID_SERVER_LEN_PART + 16)
285 if (ret_id_size < sizeof(SilcServerID))
288 memset(ret_id, 0, ret_id_size);
289 memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
291 server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
292 SILC_GET16_MSB(server_id->port, &id[server_id->ip.data_len]);
293 SILC_GET16_MSB(server_id->rnd, &id[server_id->ip.data_len + 2]);
299 SilcClientID *client_id = ret_id;
301 if (id_len != ID_CLIENT_LEN_PART + 4 &&
302 id_len != ID_CLIENT_LEN_PART + 16)
305 if (ret_id_size < sizeof(SilcClientID))
308 memset(ret_id, 0, ret_id_size);
309 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
311 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
312 client_id->rnd = id[client_id->ip.data_len];
313 memcpy(client_id->hash, &id[client_id->ip.data_len + 1],
318 case SILC_ID_CHANNEL:
320 SilcChannelID *channel_id = ret_id;
322 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
323 id_len != ID_CHANNEL_LEN_PART + 16)
326 if (ret_id_size < sizeof(SilcChannelID))
329 memset(ret_id, 0, ret_id_size);
330 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
332 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
333 SILC_GET16_MSB(channel_id->port, &id[channel_id->ip.data_len]);
334 SILC_GET16_MSB(channel_id->rnd, &id[channel_id->ip.data_len + 2]);
343 /* Returns length of the ID */
345 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
350 SilcServerID *server_id = (SilcServerID *)id;
351 return ID_SERVER_LEN_PART + server_id->ip.data_len;
356 SilcClientID *client_id = (SilcClientID *)id;
357 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
360 case SILC_ID_CHANNEL:
362 SilcChannelID *channel_id = (SilcChannelID *)id;
363 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
371 /* Duplicate ID data */
373 void *silc_id_dup(const void *id, SilcIdType type)
378 SilcServerID *server_id = (SilcServerID *)id;
379 return silc_memdup(server_id, sizeof(*server_id));
384 SilcClientID *client_id = (SilcClientID *)id;
385 return silc_memdup(client_id, sizeof(*client_id));
388 case SILC_ID_CHANNEL:
390 SilcChannelID *channel_id = (SilcChannelID *)id;
391 return silc_memdup(channel_id, sizeof(*channel_id));