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_LOG_DEBUG(("Parsing ID payload"));
53 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
54 new = silc_calloc(1, sizeof(*new));
56 ret = silc_buffer_unformat(&buffer,
57 SILC_STR_UI_SHORT(&new->type),
58 SILC_STR_UI_SHORT(&new->len),
63 silc_buffer_pull(&buffer, 4);
65 if (new->len > buffer.len)
68 ret = silc_buffer_unformat(&buffer,
69 SILC_STR_UI_XNSTRING_ALLOC(&new->id, new->len),
74 silc_buffer_push(&buffer, 4);
83 /* Return the ID directly from the raw payload data. */
85 void *silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len)
87 SilcBufferStruct buffer;
90 unsigned char *id_data = NULL;
94 silc_buffer_set(&buffer, (unsigned char *)data, len);
95 ret = silc_buffer_unformat(&buffer,
96 SILC_STR_UI_SHORT(&type),
97 SILC_STR_UI_SHORT(&idlen),
102 silc_buffer_pull(&buffer, 4);
104 if (idlen > buffer.len)
107 ret = silc_buffer_unformat(&buffer,
108 SILC_STR_UI_XNSTRING_ALLOC(&id_data, idlen),
113 id = silc_id_str2id(id_data, idlen, type);
121 /* Encodes ID Payload */
123 SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type)
126 unsigned char *id_data;
129 id_data = silc_id_id2str(id, type);
130 len = silc_id_get_len(id, type);
131 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
137 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
138 SilcUInt32 id_len, SilcIdType type)
142 SILC_LOG_DEBUG(("Encoding %s ID payload",
143 type == SILC_ID_CLIENT ? "Client" :
144 type == SILC_ID_SERVER ? "Server" : "Channel"));
146 buffer = silc_buffer_alloc(4 + id_len);
147 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
148 silc_buffer_format(buffer,
149 SILC_STR_UI_SHORT(type),
150 SILC_STR_UI_SHORT(id_len),
151 SILC_STR_UI_XNSTRING(id, id_len),
156 /* Free ID Payload */
158 void silc_id_payload_free(SilcIDPayload payload)
161 silc_free(payload->id);
168 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
170 return payload ? payload->type : 0;
175 void *silc_id_payload_get_id(SilcIDPayload payload)
177 return payload ? silc_id_str2id(payload->id, payload->len,
178 payload->type) : NULL;
181 /* Get raw ID data. Data is duplicated. */
183 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
188 return silc_memdup(payload->id, payload->len);
191 /* Get length of ID */
193 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
195 return payload ? payload->len : 0;
198 /* Converts ID to string. */
200 unsigned char *silc_id_id2str(const void *id, SilcIdType type)
202 unsigned char *ret_id;
203 SilcServerID *server_id;
204 SilcClientID *client_id;
205 SilcChannelID *channel_id;
206 SilcUInt32 id_len = silc_id_get_len(id, type);
210 server_id = (SilcServerID *)id;
211 ret_id = silc_calloc(id_len, sizeof(unsigned char));
212 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
213 SILC_PUT16_MSB(server_id->port, &ret_id[4]);
214 SILC_PUT16_MSB(server_id->rnd, &ret_id[6]);
218 client_id = (SilcClientID *)id;
219 ret_id = silc_calloc(id_len, sizeof(unsigned char));
220 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
221 ret_id[4] = client_id->rnd;
222 memcpy(&ret_id[5], client_id->hash, CLIENTID_HASH_LEN);
225 case SILC_ID_CHANNEL:
226 channel_id = (SilcChannelID *)id;
227 ret_id = silc_calloc(id_len, sizeof(unsigned char));
228 memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
229 SILC_PUT16_MSB(channel_id->port, &ret_id[4]);
230 SILC_PUT16_MSB(channel_id->rnd, &ret_id[6]);
238 /* Converts string to a ID */
240 void *silc_id_str2id(const unsigned char *id, SilcUInt32 id_len, SilcIdType type)
246 SilcServerID *server_id;
248 if (id_len != ID_SERVER_LEN_PART + 4 &&
249 id_len != ID_SERVER_LEN_PART + 16)
252 server_id = silc_calloc(1, sizeof(*server_id));
253 memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
255 server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
256 SILC_GET16_MSB(server_id->port, &id[4]);
257 SILC_GET16_MSB(server_id->rnd, &id[6]);
263 SilcClientID *client_id;
265 if (id_len != ID_CLIENT_LEN_PART + 4 &&
266 id_len != ID_CLIENT_LEN_PART + 16)
269 client_id = silc_calloc(1, sizeof(*client_id));
270 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
272 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
273 client_id->rnd = id[4];
274 memcpy(client_id->hash, &id[5], CLIENTID_HASH_LEN);
278 case SILC_ID_CHANNEL:
280 SilcChannelID *channel_id;
282 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
283 id_len != ID_CHANNEL_LEN_PART + 16)
286 channel_id = silc_calloc(1, sizeof(*channel_id));
287 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
289 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
290 SILC_GET16_MSB(channel_id->port, &id[4]);
291 SILC_GET16_MSB(channel_id->rnd, &id[6]);
300 /* Returns length of the ID */
302 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
307 SilcServerID *server_id = (SilcServerID *)id;
308 return ID_SERVER_LEN_PART + server_id->ip.data_len;
313 SilcClientID *client_id = (SilcClientID *)id;
314 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
317 case SILC_ID_CHANNEL:
319 SilcChannelID *channel_id = (SilcChannelID *)id;
320 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
328 /* Duplicate ID data */
330 void *silc_id_dup(const void *id, SilcIdType type)
335 SilcServerID *server_id = (SilcServerID *)id;
336 return silc_memdup(server_id, sizeof(*server_id));
341 SilcClientID *client_id = (SilcClientID *)id;
342 return silc_memdup(client_id, sizeof(*client_id));
345 case SILC_ID_CHANNEL:
347 SilcChannelID *channel_id = (SilcChannelID *)id;
348 return silc_memdup(channel_id, sizeof(*channel_id));