5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005 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,
88 SilcIdType *ret_type, void *ret_id,
89 SilcUInt32 ret_id_size)
91 SilcBufferStruct buffer;
94 unsigned char *id_data;
97 silc_buffer_set(&buffer, (unsigned char *)data, len);
98 ret = silc_buffer_unformat(&buffer,
99 SILC_STR_UI_SHORT(&type),
100 SILC_STR_UI_SHORT(&idlen),
105 if (type > SILC_ID_CHANNEL)
108 silc_buffer_pull(&buffer, 4);
110 if (idlen > silc_buffer_len(&buffer) || idlen > SILC_PACKET_MAX_ID_LEN)
113 ret = silc_buffer_unformat(&buffer,
114 SILC_STR_UI_XNSTRING(&id_data, idlen),
119 if (!silc_id_str2id(id_data, idlen, type, ret_id, ret_id_size))
128 SILC_LOG_DEBUG(("Error parsing ID payload"));
132 /* Encodes ID Payload */
134 SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type)
137 unsigned char id_data[32];
140 if (!silc_id_id2str(id, type, id_data, sizeof(id_data), &len))
142 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
147 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
148 SilcUInt32 id_len, SilcIdType type)
152 buffer = silc_buffer_alloc_size(4 + id_len);
155 silc_buffer_format(buffer,
156 SILC_STR_UI_SHORT(type),
157 SILC_STR_UI_SHORT(id_len),
158 SILC_STR_UI_XNSTRING(id, id_len),
163 /* Free ID Payload */
165 void silc_id_payload_free(SilcIDPayload payload)
168 silc_free(payload->id);
175 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
177 return payload ? payload->type : 0;
182 SilcBool silc_id_payload_get_id(SilcIDPayload payload, void *ret_id,
183 SilcUInt32 ret_id_len)
187 return silc_id_str2id(payload->id, payload->len, payload->type,
191 /* Get raw ID data. Data is duplicated. */
193 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
198 return silc_memdup(payload->id, payload->len);
201 /* Get length of ID */
203 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
205 return payload ? payload->len : 0;
208 /* Converts ID to string. */
210 SilcBool silc_id_id2str(const void *id, SilcIdType type,
211 unsigned char *ret_id, SilcUInt32 ret_id_size,
212 SilcUInt32 *ret_id_len)
214 SilcServerID *server_id;
215 SilcClientID *client_id;
216 SilcChannelID *channel_id;
217 SilcUInt32 id_len = silc_id_get_len(id, type);
219 if (id_len > ret_id_size)
223 *ret_id_len = id_len;
225 if (id_len > SILC_PACKET_MAX_ID_LEN)
230 server_id = (SilcServerID *)id;
231 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
232 SILC_PUT16_MSB(server_id->port, &ret_id[server_id->ip.data_len]);
233 SILC_PUT16_MSB(server_id->rnd, &ret_id[server_id->ip.data_len + 2]);
237 client_id = (SilcClientID *)id;
238 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
239 ret_id[client_id->ip.data_len] = client_id->rnd;
240 memcpy(&ret_id[client_id->ip.data_len + 1], client_id->hash,
244 case SILC_ID_CHANNEL:
245 channel_id = (SilcChannelID *)id;
246 memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
247 SILC_PUT16_MSB(channel_id->port, &ret_id[channel_id->ip.data_len]);
248 SILC_PUT16_MSB(channel_id->rnd, &ret_id[channel_id->ip.data_len + 2]);
256 /* Converts string to a ID */
258 SilcBool silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
259 SilcIdType type, void *ret_id, SilcUInt32 ret_id_size)
261 if (id_len > SILC_PACKET_MAX_ID_LEN)
267 SilcServerID *server_id = ret_id;
269 if (id_len != ID_SERVER_LEN_PART + 4 &&
270 id_len != ID_SERVER_LEN_PART + 16)
273 if (ret_id_size < sizeof(SilcServerID))
276 memset(ret_id, 0, ret_id_size);
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 = ret_id;
289 if (id_len != ID_CLIENT_LEN_PART + 4 &&
290 id_len != ID_CLIENT_LEN_PART + 16)
293 if (ret_id_size < sizeof(SilcClientID))
296 memset(ret_id, 0, ret_id_size);
297 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
299 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
300 client_id->rnd = id[client_id->ip.data_len];
301 memcpy(client_id->hash, &id[client_id->ip.data_len + 1],
306 case SILC_ID_CHANNEL:
308 SilcChannelID *channel_id = ret_id;
310 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
311 id_len != ID_CHANNEL_LEN_PART + 16)
314 if (ret_id_size < sizeof(SilcChannelID))
317 memset(ret_id, 0, ret_id_size);
318 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
320 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
321 SILC_GET16_MSB(channel_id->port, &id[channel_id->ip.data_len]);
322 SILC_GET16_MSB(channel_id->rnd, &id[channel_id->ip.data_len + 2]);
331 /* Returns length of the ID */
333 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
338 SilcServerID *server_id = (SilcServerID *)id;
339 return ID_SERVER_LEN_PART + server_id->ip.data_len;
344 SilcClientID *client_id = (SilcClientID *)id;
345 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
348 case SILC_ID_CHANNEL:
350 SilcChannelID *channel_id = (SilcChannelID *)id;
351 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
359 /* Duplicate ID data */
361 void *silc_id_dup(const void *id, SilcIdType type)
366 SilcServerID *server_id = (SilcServerID *)id;
367 return silc_memdup(server_id, sizeof(*server_id));
372 SilcClientID *client_id = (SilcClientID *)id;
373 return silc_memdup(client_id, sizeof(*client_id));
376 case SILC_ID_CHANNEL:
378 SilcChannelID *channel_id = (SilcChannelID *)id;
379 return silc_memdup(channel_id, sizeof(*channel_id));