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.
21 #include "silcincludes.h"
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 > buffer.len || newp->len > SILC_PACKET_MAX_ID_LEN)
70 ret = silc_buffer_unformat(&buffer,
71 SILC_STR_UI_XNSTRING_ALLOC(&newp->id, newp->len),
76 silc_buffer_push(&buffer, 4);
81 SILC_LOG_DEBUG(("Error parsing ID payload"));
86 /* Return the ID directly from the raw payload data. */
88 void *silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len,
91 SilcBufferStruct buffer;
94 unsigned char *id_data;
98 silc_buffer_set(&buffer, (unsigned char *)data, len);
99 ret = silc_buffer_unformat(&buffer,
100 SILC_STR_UI_SHORT(&type),
101 SILC_STR_UI_SHORT(&idlen),
106 if (type > SILC_ID_CHANNEL)
109 silc_buffer_pull(&buffer, 4);
111 if (idlen > buffer.len || idlen > SILC_PACKET_MAX_ID_LEN)
114 ret = silc_buffer_unformat(&buffer,
115 SILC_STR_UI_XNSTRING(&id_data, idlen),
120 id = silc_id_str2id(id_data, idlen, type);
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;
140 id_data = silc_id_id2str(id, type);
141 len = silc_id_get_len(id, type);
142 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
148 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
149 SilcUInt32 id_len, SilcIdType type)
153 buffer = silc_buffer_alloc_size(4 + id_len);
156 silc_buffer_format(buffer,
157 SILC_STR_UI_SHORT(type),
158 SILC_STR_UI_SHORT(id_len),
159 SILC_STR_UI_XNSTRING(id, id_len),
164 /* Free ID Payload */
166 void silc_id_payload_free(SilcIDPayload payload)
169 silc_free(payload->id);
176 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
178 return payload ? payload->type : 0;
183 void *silc_id_payload_get_id(SilcIDPayload payload)
185 return payload ? silc_id_str2id(payload->id, payload->len,
186 payload->type) : NULL;
189 /* Get raw ID data. Data is duplicated. */
191 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
196 return silc_memdup(payload->id, payload->len);
199 /* Get length of ID */
201 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
203 return payload ? payload->len : 0;
206 /* Converts ID to string. */
208 unsigned char *silc_id_id2str(const void *id, SilcIdType type)
210 unsigned char *ret_id;
211 SilcServerID *server_id;
212 SilcClientID *client_id;
213 SilcChannelID *channel_id;
214 SilcUInt32 id_len = silc_id_get_len(id, type);
216 if (id_len > SILC_PACKET_MAX_ID_LEN)
221 server_id = (SilcServerID *)id;
222 ret_id = silc_calloc(id_len, sizeof(unsigned char));
225 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
226 SILC_PUT16_MSB(server_id->port, &ret_id[server_id->ip.data_len]);
227 SILC_PUT16_MSB(server_id->rnd, &ret_id[server_id->ip.data_len + 2]);
231 client_id = (SilcClientID *)id;
232 ret_id = silc_calloc(id_len, sizeof(unsigned char));
235 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
236 ret_id[client_id->ip.data_len] = client_id->rnd;
237 memcpy(&ret_id[client_id->ip.data_len + 1], client_id->hash,
241 case SILC_ID_CHANNEL:
242 channel_id = (SilcChannelID *)id;
243 ret_id = silc_calloc(id_len, sizeof(unsigned char));
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 void *silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
261 if (id_len > SILC_PACKET_MAX_ID_LEN)
267 SilcServerID *server_id;
269 if (id_len != ID_SERVER_LEN_PART + 4 &&
270 id_len != ID_SERVER_LEN_PART + 16)
273 server_id = silc_calloc(1, sizeof(*server_id));
276 memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
278 server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
279 SILC_GET16_MSB(server_id->port, &id[server_id->ip.data_len]);
280 SILC_GET16_MSB(server_id->rnd, &id[server_id->ip.data_len + 2]);
286 SilcClientID *client_id;
288 if (id_len != ID_CLIENT_LEN_PART + 4 &&
289 id_len != ID_CLIENT_LEN_PART + 16)
292 client_id = silc_calloc(1, sizeof(*client_id));
295 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
297 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
298 client_id->rnd = id[client_id->ip.data_len];
299 memcpy(client_id->hash, &id[client_id->ip.data_len + 1],
304 case SILC_ID_CHANNEL:
306 SilcChannelID *channel_id;
308 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
309 id_len != ID_CHANNEL_LEN_PART + 16)
312 channel_id = silc_calloc(1, sizeof(*channel_id));
315 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
317 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
318 SILC_GET16_MSB(channel_id->port, &id[channel_id->ip.data_len]);
319 SILC_GET16_MSB(channel_id->rnd, &id[channel_id->ip.data_len + 2]);
328 /* Returns length of the ID */
330 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
335 SilcServerID *server_id = (SilcServerID *)id;
336 return ID_SERVER_LEN_PART + server_id->ip.data_len;
341 SilcClientID *client_id = (SilcClientID *)id;
342 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
345 case SILC_ID_CHANNEL:
347 SilcChannelID *channel_id = (SilcChannelID *)id;
348 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
356 /* Duplicate ID data */
358 void *silc_id_dup(const void *id, SilcIdType type)
363 SilcServerID *server_id = (SilcServerID *)id;
364 return silc_memdup(server_id, sizeof(*server_id));
369 SilcClientID *client_id = (SilcClientID *)id;
370 return silc_memdup(client_id, sizeof(*client_id));
373 case SILC_ID_CHANNEL:
375 SilcChannelID *channel_id = (SilcChannelID *)id;
376 return silc_memdup(channel_id, sizeof(*channel_id));