Changes in uspace/srv/net/tl/icmp/icmp.c [014dd57b:ffa2c8ef] in mainline
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uspace/srv/net/tl/icmp/icmp.c
r014dd57b rffa2c8ef 33 33 /** @file 34 34 * ICMP module implementation. 35 * @see icmp.h36 35 */ 37 36 … … 42 41 #include <stdint.h> 43 42 #include <str.h> 44 #include <ipc/ipc.h>45 43 #include <ipc/services.h> 46 44 #include <ipc/net.h> … … 51 49 #include <byteorder.h> 52 50 #include <errno.h> 51 #include <adt/hash_table.h> 53 52 54 53 #include <net/socket_codes.h> … … 64 63 #include <net_checksum.h> 65 64 #include <icmp_client.h> 66 #include <icmp_ interface.h>65 #include <icmp_remote.h> 67 66 #include <il_remote.h> 68 67 #include <ip_client.h> … … 73 72 #include <icmp_header.h> 74 73 75 #include "icmp.h" 76 77 /** ICMP module name. */ 74 /** ICMP module name */ 78 75 #define NAME "icmp" 79 76 80 /** Default ICMP error reporting. */ 81 #define NET_DEFAULT_ICMP_ERROR_REPORTING true 82 83 /** Default ICMP echo replying. */ 84 #define NET_DEFAULT_ICMP_ECHO_REPLYING true 85 86 /** Original datagram length in bytes transfered to the error notification 87 * message. 88 */ 89 #define ICMP_KEEP_LENGTH 8 90 91 /** Free identifier numbers pool start. */ 92 #define ICMP_FREE_IDS_START 1 93 94 /** Free identifier numbers pool end. */ 95 #define ICMP_FREE_IDS_END UINT16_MAX 96 97 /** Computes the ICMP datagram checksum. 98 * 99 * @param[in,out] header The ICMP datagram header. 100 * @param[in] length The total datagram length. 101 * @return The computed checksum. 77 /** Number of replies hash table keys */ 78 #define REPLY_KEYS 2 79 80 /** Number of replies hash table buckets */ 81 #define REPLY_BUCKETS 1024 82 83 /** 84 * Original datagram length in bytes transfered to the error 85 * notification message. 86 */ 87 #define ICMP_KEEP_LENGTH 8 88 89 /** Compute the ICMP datagram checksum. 90 * 91 * @param[in,out] header ICMP datagram header. 92 * @param[in] length Total datagram length. 93 * 94 * @return Computed checksum. 95 * 102 96 */ 103 97 #define ICMP_CHECKSUM(header, length) \ … … 105 99 106 100 /** An echo request datagrams pattern. */ 107 #define ICMP_ECHO_TEXT "Hello from HelenOS." 108 109 /** Computes an ICMP reply data key. 110 * 111 * @param[in] id The message identifier. 112 * @param[in] sequence The message sequence number. 113 * @return The computed ICMP reply data key. 114 */ 115 #define ICMP_GET_REPLY_KEY(id, sequence) \ 116 (((id) << 16) | (sequence & 0xFFFF)) 117 118 119 /** ICMP global data. */ 120 icmp_globals_t icmp_globals; 121 122 INT_MAP_IMPLEMENT(icmp_replies, icmp_reply_t); 123 INT_MAP_IMPLEMENT(icmp_echo_data, icmp_echo_t); 124 125 /** Releases the packet and returns the result. 126 * 127 * @param[in] packet The packet queue to be released. 128 * @param[in] result The result to be returned. 129 * @return The result parameter. 130 */ 131 static int icmp_release_and_return(packet_t *packet, int result) 132 { 133 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 134 return result; 135 } 136 137 /** Sends the ICMP message. 138 * 139 * Sets the message type and code and computes the checksum. 101 #define ICMP_ECHO_TEXT "ICMP hello from HelenOS." 102 103 /** ICMP reply data. */ 104 typedef struct { 105 /** Hash table link */ 106 link_t link; 107 108 /** Reply identification and sequence */ 109 icmp_param_t id; 110 icmp_param_t sequence; 111 112 /** Reply signaling */ 113 fibril_condvar_t condvar; 114 115 /** Reply result */ 116 int result; 117 } icmp_reply_t; 118 119 /** Global data */ 120 static int phone_net = -1; 121 static int phone_ip = -1; 122 static bool error_reporting = true; 123 static bool echo_replying = true; 124 static packet_dimension_t icmp_dimension; 125 126 /** ICMP client identification counter */ 127 static atomic_t icmp_client; 128 129 /** ICMP identifier and sequence number (client-specific) */ 130 static fibril_local icmp_param_t icmp_id; 131 static fibril_local icmp_param_t icmp_seq; 132 133 /** Reply hash table */ 134 static fibril_mutex_t reply_lock; 135 static hash_table_t replies; 136 137 static hash_index_t replies_hash(unsigned long key[]) 138 { 139 /* 140 * ICMP identifier and sequence numbers 141 * are 16-bit values. 142 */ 143 hash_index_t index = ((key[0] & 0xffff) << 16) | (key[1] & 0xffff); 144 return (index % REPLY_BUCKETS); 145 } 146 147 static int replies_compare(unsigned long key[], hash_count_t keys, link_t *item) 148 { 149 icmp_reply_t *reply = 150 hash_table_get_instance(item, icmp_reply_t, link); 151 152 if (keys == 1) 153 return (reply->id == key[0]); 154 else 155 return ((reply->id == key[0]) && (reply->sequence == key[1])); 156 } 157 158 static void replies_remove_callback(link_t *item) 159 { 160 } 161 162 static hash_table_operations_t reply_ops = { 163 .hash = replies_hash, 164 .compare = replies_compare, 165 .remove_callback = replies_remove_callback 166 }; 167 168 /** Release the packet and return the result. 169 * 170 * @param[in] packet Packet queue to be released. 171 * 172 */ 173 static void icmp_release(packet_t *packet) 174 { 175 pq_release_remote(phone_net, packet_get_id(packet)); 176 } 177 178 /** Send the ICMP message. 179 * 180 * Set the message type and code and compute the checksum. 140 181 * Error messages are sent only if allowed in the configuration. 141 * Releases the packet on errors. 142 * 143 * @param[in] type The message type. 144 * @param[in] code The message code. 145 * @param[in] packet The message packet to be sent. 146 * @param[in] header The ICMP header. 147 * @param[in] error The error service to be announced. Should be 148 * SERVICE_ICMP or zero. 149 * @param[in] ttl The time to live. 150 * @param[in] tos The type of service. 151 * @param[in] dont_fragment The value indicating whether the datagram must not 152 * be fragmented. Is used as a MTU discovery. 153 * @return EOK on success. 154 * @return EPERM if the error message is not allowed. 155 */ 156 static int icmp_send_packet(icmp_type_t type, icmp_code_t code, packet_t *packet, 157 icmp_header_t *header, services_t error, ip_ttl_t ttl, ip_tos_t tos, 158 int dont_fragment) 159 { 160 int rc; 161 182 * Release the packet on errors. 183 * 184 * @param[in] type Message type. 185 * @param[in] code Message code. 186 * @param[in] packet Message packet to be sent. 187 * @param[in] header ICMP header. 188 * @param[in] error Error service to be announced. Should be 189 * SERVICE_ICMP or zero. 190 * @param[in] ttl Time to live. 191 * @param[in] tos Type of service. 192 * @param[in] dont_fragment Disable fragmentation. 193 * 194 * @return EOK on success. 195 * @return EPERM if the error message is not allowed. 196 * 197 */ 198 static int icmp_send_packet(icmp_type_t type, icmp_code_t code, 199 packet_t *packet, icmp_header_t *header, services_t error, ip_ttl_t ttl, 200 ip_tos_t tos, bool dont_fragment) 201 { 162 202 /* Do not send an error if disabled */ 163 if (error && !icmp_globals.error_reporting) 164 return icmp_release_and_return(packet, EPERM); 165 203 if ((error) && (!error_reporting)) { 204 icmp_release(packet); 205 return EPERM; 206 } 207 166 208 header->type = type; 167 209 header->code = code; 210 211 /* 212 * The checksum needs to be calculated 213 * with a virtual checksum field set to 214 * zero. 215 */ 168 216 header->checksum = 0; 169 217 header->checksum = ICMP_CHECKSUM(header, 170 218 packet_get_data_length(packet)); 171 219 172 rc = ip_client_prepare_packet(packet, IPPROTO_ICMP, ttl, tos,220 int rc = ip_client_prepare_packet(packet, IPPROTO_ICMP, ttl, tos, 173 221 dont_fragment, 0); 174 if (rc != EOK) 175 return icmp_release_and_return(packet, rc); 176 177 return ip_send_msg(icmp_globals.ip_phone, -1, packet, SERVICE_ICMP, 178 error); 179 } 180 181 /** Prepares the ICMP error packet. 182 * 183 * Truncates the original packet if longer than ICMP_KEEP_LENGTH bytes. 184 * Prefixes and returns the ICMP header. 185 * 186 * @param[in,out] packet The original packet. 222 if (rc != EOK) { 223 icmp_release(packet); 224 return rc; 225 } 226 227 return ip_send_msg(phone_ip, -1, packet, SERVICE_ICMP, error); 228 } 229 230 /** Prepare the ICMP error packet. 231 * 232 * Truncate the original packet if longer than ICMP_KEEP_LENGTH bytes. 233 * Prefix and return the ICMP header. 234 * 235 * @param[in,out] packet Original packet. 236 * 187 237 * @return The prefixed ICMP header. 188 238 * @return NULL on errors. 239 * 189 240 */ 190 241 static icmp_header_t *icmp_prepare_packet(packet_t *packet) 191 242 { 192 icmp_header_t *header; 193 size_t header_length; 194 size_t total_length; 195 196 total_length = packet_get_data_length(packet); 243 size_t total_length = packet_get_data_length(packet); 197 244 if (total_length <= 0) 198 245 return NULL; 199 200 header_length = ip_client_header_length(packet);246 247 size_t header_length = ip_client_header_length(packet); 201 248 if (header_length <= 0) 202 249 return NULL; 203 250 204 251 /* Truncate if longer than 64 bits (without the IP header) */ 205 252 if ((total_length > header_length + ICMP_KEEP_LENGTH) && 206 253 (packet_trim(packet, 0, 207 total_length - header_length - ICMP_KEEP_LENGTH) != EOK)) {254 total_length - header_length - ICMP_KEEP_LENGTH) != EOK)) 208 255 return NULL; 209 } 210 211 header = PACKET_PREFIX(packet, icmp_header_t); 256 257 icmp_header_t *header = PACKET_PREFIX(packet, icmp_header_t); 212 258 if (!header) 213 259 return NULL; 214 260 215 261 bzero(header, sizeof(*header)); 216 262 return header; 217 263 } 218 264 219 /** Request san echo message.220 * 221 * Send s a packet with specified parameters to the target host and waits for222 * the reply upto the given timeout.223 * Block sthe caller until the reply or the timeout occurs.224 * 225 * @param[in] id The message identifier.226 * @param[in] sequence The message sequence parameter.227 * @param[in] size The message data length in bytes.228 * @param[in] timeout The timeout in miliseconds.229 * @param[in] ttl The time to live.230 * @param[in] tos The type of service.231 * @param[in] dont_fragment The value indicating whether the datagram must not232 * be fragmented. Is used as a MTU discovery.233 * @param[in] addr The target host address.234 * @param[in] addrlen The torget host address length.235 * @return 236 * @return 237 * 238 * @return 239 * @return 240 * 241 * @return 242 * @return EPARTY if there was an internal error.265 /** Request an echo message. 266 * 267 * Send a packet with specified parameters to the target host 268 * and wait for the reply upto the given timeout. 269 * Block the caller until the reply or the timeout occurs. 270 * 271 * @param[in] id Message identifier. 272 * @param[in] sequence Message sequence parameter. 273 * @param[in] size Message data length in bytes. 274 * @param[in] timeout Timeout in miliseconds. 275 * @param[in] ttl Time to live. 276 * @param[in] tos Type of service. 277 * @param[in] dont_fragment Disable fragmentation. 278 * @param[in] addr Target host address. 279 * @param[in] addrlen Torget host address length. 280 * 281 * @return ICMP_ECHO on success. 282 * @return ETIMEOUT if the reply has not arrived before the 283 * timeout. 284 * @return ICMP type of the received error notification. 285 * @return EINVAL if the addrlen parameter is less or equal to 286 * zero. 287 * @return ENOMEM if there is not enough memory left. 288 * 243 289 */ 244 290 static int icmp_echo(icmp_param_t id, icmp_param_t sequence, size_t size, 245 mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, 246 const struct sockaddr * addr, socklen_t addrlen) 247 { 248 icmp_header_t *header; 249 packet_t *packet; 250 size_t length; 251 uint8_t *data; 252 icmp_reply_t *reply; 253 int reply_key; 254 int index; 255 int rc; 256 291 mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, bool dont_fragment, 292 const struct sockaddr *addr, socklen_t addrlen) 293 { 257 294 if (addrlen <= 0) 258 295 return EINVAL; 259 260 length = (size_t) addrlen; 261 /* TODO do not ask all the time */ 262 rc = ip_packet_size_req(icmp_globals.ip_phone, -1, 263 &icmp_globals.packet_dimension); 264 if (rc != EOK) 265 return rc; 266 267 packet = packet_get_4_remote(icmp_globals.net_phone, size, 268 icmp_globals.packet_dimension.addr_len, 269 ICMP_HEADER_SIZE + icmp_globals.packet_dimension.prefix, 270 icmp_globals.packet_dimension.suffix); 296 297 size_t length = (size_t) addrlen; 298 299 packet_t *packet = packet_get_4_remote(phone_net, size, 300 icmp_dimension.addr_len, ICMP_HEADER_SIZE + icmp_dimension.prefix, 301 icmp_dimension.suffix); 271 302 if (!packet) 272 303 return ENOMEM; 273 304 274 305 /* Prepare the requesting packet, set the destination address. */ 275 rc = packet_set_addr(packet, NULL, (const uint8_t *) addr, length); 276 if (rc != EOK) 277 return icmp_release_and_return(packet, rc); 278 306 int rc = packet_set_addr(packet, NULL, (const uint8_t *) addr, length); 307 if (rc != EOK) { 308 icmp_release(packet); 309 return rc; 310 } 311 279 312 /* Allocate space in the packet */ 280 data = (uint8_t *) packet_suffix(packet, size); 281 if (!data) 282 return icmp_release_and_return(packet, ENOMEM); 283 313 uint8_t *data = (uint8_t *) packet_suffix(packet, size); 314 if (!data) { 315 icmp_release(packet); 316 return ENOMEM; 317 } 318 284 319 /* Fill the data */ 285 320 length = 0; … … 289 324 } 290 325 memcpy(data + length, ICMP_ECHO_TEXT, size - length); 291 326 292 327 /* Prefix the header */ 293 header = PACKET_PREFIX(packet, icmp_header_t); 294 if (!header) 295 return icmp_release_and_return(packet, ENOMEM); 296 297 bzero(header, sizeof(*header)); 328 icmp_header_t *header = PACKET_PREFIX(packet, icmp_header_t); 329 if (!header) { 330 icmp_release(packet); 331 return ENOMEM; 332 } 333 334 bzero(header, sizeof(icmp_header_t)); 298 335 header->un.echo.identifier = id; 299 336 header->un.echo.sequence_number = sequence; 300 337 301 338 /* Prepare the reply structure */ 302 reply = malloc(sizeof(*reply)); 303 if (!reply) 304 return icmp_release_and_return(packet, ENOMEM); 305 306 fibril_mutex_initialize(&reply->mutex); 307 fibril_mutex_lock(&reply->mutex); 339 icmp_reply_t *reply = malloc(sizeof(icmp_reply_t)); 340 if (!reply) { 341 icmp_release(packet); 342 return ENOMEM; 343 } 344 345 reply->id = id; 346 reply->sequence = sequence; 308 347 fibril_condvar_initialize(&reply->condvar); 309 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, 310 header->un.echo.sequence_number); 311 index = icmp_replies_add(&icmp_globals.replies, reply_key, reply); 312 if (index < 0) { 313 free(reply); 314 return icmp_release_and_return(packet, index); 315 } 316 317 /* Unlock the globals so that we can wait for the reply */ 318 fibril_rwlock_write_unlock(&icmp_globals.lock); 319 348 349 /* Add the reply to the replies hash table */ 350 fibril_mutex_lock(&reply_lock); 351 352 unsigned long key[REPLY_KEYS] = {id, sequence}; 353 hash_table_insert(&replies, key, &reply->link); 354 320 355 /* Send the request */ 321 356 icmp_send_packet(ICMP_ECHO, 0, packet, header, 0, ttl, tos, 322 357 dont_fragment); 323 358 324 359 /* Wait for the reply. Timeout in microseconds. */ 325 rc = fibril_condvar_wait_timeout(&reply->condvar, &reply ->mutex,360 rc = fibril_condvar_wait_timeout(&reply->condvar, &reply_lock, 326 361 timeout * 1000); 327 362 if (rc == EOK) 328 363 rc = reply->result; 329 330 /* Drop the reply mutex before locking the globals again*/331 fibril_mutex_unlock(&reply->mutex);332 fibril_rwlock_write_lock(&icmp_globals.lock);333 334 /* Destroy the reply structure */335 icmp_replies_exclude_index(&icmp_globals.replies, index);336 364 365 /* Remove the reply from the replies hash table */ 366 hash_table_remove(&replies, key, REPLY_KEYS); 367 368 fibril_mutex_unlock(&reply_lock); 369 370 free(reply); 371 337 372 return rc; 338 373 } 339 374 340 static int icmp_destination_unreachable _msg_local(int icmp_phone,341 icmp_code_t code, icmp_param_t mtu,packet_t *packet)342 { 343 icmp_header_t *header ;344 345 header = icmp_prepare_packet(packet);346 if (!header)347 return icmp_release_and_return(packet, ENOMEM);348 375 static int icmp_destination_unreachable(icmp_code_t code, icmp_param_t mtu, 376 packet_t *packet) 377 { 378 icmp_header_t *header = icmp_prepare_packet(packet); 379 if (!header) { 380 icmp_release(packet); 381 return ENOMEM; 382 } 383 349 384 if (mtu) 350 385 header->un.frag.mtu = mtu; 351 386 352 387 return icmp_send_packet(ICMP_DEST_UNREACH, code, packet, header, 353 SERVICE_ICMP, 0, 0, 0);354 } 355 356 static int icmp_source_quench _msg_local(int icmp_phone,packet_t *packet)357 { 358 icmp_header_t *header ;359 360 header = icmp_prepare_packet(packet);361 if (!header)362 return icmp_release_and_return(packet, ENOMEM);363 388 SERVICE_ICMP, 0, 0, false); 389 } 390 391 static int icmp_source_quench(packet_t *packet) 392 { 393 icmp_header_t *header = icmp_prepare_packet(packet); 394 if (!header) { 395 icmp_release(packet); 396 return ENOMEM; 397 } 398 364 399 return icmp_send_packet(ICMP_SOURCE_QUENCH, 0, packet, header, 365 SERVICE_ICMP, 0, 0, 0); 366 } 367 368 static int icmp_time_exceeded_msg_local(int icmp_phone, icmp_code_t code, 400 SERVICE_ICMP, 0, 0, false); 401 } 402 403 static int icmp_time_exceeded(icmp_code_t code, packet_t *packet) 404 { 405 icmp_header_t *header = icmp_prepare_packet(packet); 406 if (!header) { 407 icmp_release(packet); 408 return ENOMEM; 409 } 410 411 return icmp_send_packet(ICMP_TIME_EXCEEDED, code, packet, header, 412 SERVICE_ICMP, 0, 0, false); 413 } 414 415 static int icmp_parameter_problem(icmp_code_t code, icmp_param_t pointer, 369 416 packet_t *packet) 370 417 { 371 icmp_header_t *header; 372 373 header = icmp_prepare_packet(packet); 374 if (!header) 375 return icmp_release_and_return(packet, ENOMEM); 376 377 return icmp_send_packet(ICMP_TIME_EXCEEDED, code, packet, header, 378 SERVICE_ICMP, 0, 0, 0); 379 } 380 381 static int icmp_parameter_problem_msg_local(int icmp_phone, icmp_code_t code, 382 icmp_param_t pointer, packet_t *packet) 383 { 384 icmp_header_t *header; 385 386 header = icmp_prepare_packet(packet); 387 if (!header) 388 return icmp_release_and_return(packet, ENOMEM); 389 418 icmp_header_t *header = icmp_prepare_packet(packet); 419 if (!header) { 420 icmp_release(packet); 421 return ENOMEM; 422 } 423 390 424 header->un.param.pointer = pointer; 391 425 return icmp_send_packet(ICMP_PARAMETERPROB, code, packet, header, 392 SERVICE_ICMP, 0, 0, 0);393 } 394 395 /** Tr iesto set the pending reply result as the received message type.426 SERVICE_ICMP, 0, 0, false); 427 } 428 429 /** Try to set the pending reply result as the received message type. 396 430 * 397 431 * If the reply data is not present, the reply timed out and the other fibril 398 * is already awake. 399 * Releases the packet.400 * 401 * @param[in] packet The received reply message.402 * @param[in] header The ICMP message header.403 * @param[in] type The received reply message type.404 * @param[in] code The received reply message code.405 */ 406 static void 432 * is already awake. The packet is released. 433 * 434 * @param[in] packet The received reply message. 435 * @param[in] header The ICMP message header. 436 * @param[in] type The received reply message type. 437 * @param[in] code The received reply message code. 438 * 439 */ 440 static void icmp_process_echo_reply(packet_t *packet, icmp_header_t *header, 407 441 icmp_type_t type, icmp_code_t code) 408 442 { 409 int reply_key; 410 icmp_reply_t *reply; 411 412 /* Compute the reply key */ 413 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, 414 header->un.echo.sequence_number); 415 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 416 443 unsigned long key[REPLY_KEYS] = 444 {header->un.echo.identifier, header->un.echo.sequence_number}; 445 446 /* The packet is no longer needed */ 447 icmp_release(packet); 448 417 449 /* Find the pending reply */ 418 fibril_rwlock_write_lock(&icmp_globals.lock); 419 reply = icmp_replies_find(&icmp_globals.replies, reply_key); 420 if (reply) { 450 fibril_mutex_lock(&reply_lock); 451 452 link_t *link = hash_table_find(&replies, key); 453 if (link != NULL) { 454 icmp_reply_t *reply = 455 hash_table_get_instance(link, icmp_reply_t, link); 456 421 457 reply->result = type; 422 458 fibril_condvar_signal(&reply->condvar); 423 459 } 424 fibril_rwlock_write_unlock(&icmp_globals.lock); 425 } 426 427 /** Processes the received ICMP packet. 428 * 429 * Notifies the destination socket application. 430 * 431 * @param[in,out] packet The received packet. 432 * @param[in] error The packet error reporting service. Prefixes the 433 * received packet. 434 * @return EOK on success. 435 * @return EINVAL if the packet is not valid. 436 * @return EINVAL if the stored packet address is not the an_addr_t. 437 * @return EINVAL if the packet does not contain any data. 438 * @return NO_DATA if the packet content is shorter than the user 439 * datagram header. 440 * @return ENOMEM if there is not enough memory left. 441 * @return EADDRNOTAVAIL if the destination socket does not exist. 442 * @return Other error codes as defined for the 443 * ip_client_process_packet() function. 460 461 fibril_mutex_unlock(&reply_lock); 462 } 463 464 /** Process the received ICMP packet. 465 * 466 * Notify the destination socket application. 467 * 468 * @param[in,out] packet Received packet. 469 * @param[in] error Packet error reporting service to prefix 470 * the received packet. 471 * 472 * @return EOK on success. 473 * @return EINVAL if the packet is not valid. 474 * @return EINVAL if the stored packet address is not the an_addr_t. 475 * @return EINVAL if the packet does not contain any data. 476 * @return NO_DATA if the packet content is shorter than the user 477 * datagram header. 478 * @return ENOMEM if there is not enough memory left. 479 * @return EADDRNOTAVAIL if the destination socket does not exist. 480 * @return Other error codes as defined for the 481 * ip_client_process_packet() function. 482 * 444 483 */ 445 484 static int icmp_process_packet(packet_t *packet, services_t error) 446 485 { 447 size_t length;448 uint8_t *src;449 int addrlen;450 int result;451 void *data;452 icmp_header_t *header;453 486 icmp_type_t type; 454 487 icmp_code_t code; … … 460 493 case SERVICE_ICMP: 461 494 /* Process error */ 462 result = icmp_client_process_packet(packet, &type, &code, NULL, 463 NULL); 464 if (result < 0) 465 return result; 466 length = (size_t) result; 495 rc = icmp_client_process_packet(packet, &type, &code, NULL, NULL); 496 if (rc < 0) 497 return rc; 498 467 499 /* Remove the error header */ 468 rc = packet_trim(packet, length, 0);500 rc = packet_trim(packet, (size_t) rc, 0); 469 501 if (rc != EOK) 470 502 return rc; 503 471 504 break; 472 505 default: 473 506 return ENOTSUP; 474 507 } 475 508 476 509 /* Get rid of the IP header */ 477 length = ip_client_header_length(packet);510 size_t length = ip_client_header_length(packet); 478 511 rc = packet_trim(packet, length, 0); 479 512 if (rc != EOK) 480 513 return rc; 481 514 482 515 length = packet_get_data_length(packet); 483 516 if (length <= 0) 484 517 return EINVAL; 485 518 486 519 if (length < ICMP_HEADER_SIZE) 487 520 return EINVAL; 488 489 data = packet_get_data(packet);521 522 void *data = packet_get_data(packet); 490 523 if (!data) 491 524 return EINVAL; 492 525 493 526 /* Get ICMP header */ 494 header = (icmp_header_t *) data;495 527 icmp_header_t *header = (icmp_header_t *) data; 528 496 529 if (header->checksum) { 497 530 while (ICMP_CHECKSUM(header, length) != IP_CHECKSUM_ZERO) { … … 507 540 } 508 541 } 542 509 543 return EINVAL; 510 544 } 511 545 } 512 546 513 547 switch (header->type) { 514 548 case ICMP_ECHOREPLY: … … 517 551 else 518 552 icmp_process_echo_reply(packet, header, ICMP_ECHO, 0); 519 553 520 554 return EOK; 521 555 522 556 case ICMP_ECHO: 523 557 if (error) { … … 527 561 528 562 /* Do not send a reply if disabled */ 529 if (icmp_globals.echo_replying) { 530 addrlen = packet_get_addr(packet, &src, NULL); 531 563 if (echo_replying) { 564 uint8_t *src; 565 int addrlen = packet_get_addr(packet, &src, NULL); 566 532 567 /* 533 * Set both addresses to the source one (avoid sthe568 * Set both addresses to the source one (avoid the 534 569 * source address deletion before setting the 535 570 * destination one). … … 542 577 return EOK; 543 578 } 544 579 545 580 return EINVAL; 546 581 } 547 582 548 583 return EPERM; 549 584 550 585 case ICMP_DEST_UNREACH: 551 586 case ICMP_SOURCE_QUENCH: … … 560 595 case ICMP_SKIP: 561 596 case ICMP_PHOTURIS: 562 ip_received_error_msg( icmp_globals.ip_phone, -1, packet,597 ip_received_error_msg(phone_ip, -1, packet, 563 598 SERVICE_IP, SERVICE_ICMP); 564 599 return EOK; 565 600 566 601 default: 567 602 return ENOTSUP; … … 569 604 } 570 605 571 /** Processes the received ICMP packet.572 *573 * Is used as an entry point from the underlying IP module.574 * Releases the packet on error.575 *576 * @param device_id The device identifier. Ignored parameter.577 * @param[in,out] packet The received packet.578 * @param receiver The target service. Ignored parameter.579 * @param[in] error The packet error reporting service. Prefixes the580 * received packet.581 * @return EOK on success.582 * @return Other error codes as defined for the583 * icmp_process_packet() function.584 */585 static int icmp_received_msg_local(device_id_t device_id, packet_t *packet,586 services_t receiver, services_t error)587 {588 int rc;589 590 rc = icmp_process_packet(packet, error);591 if (rc != EOK)592 return icmp_release_and_return(packet, rc);593 594 return EOK;595 }596 597 606 /** Process IPC messages from the IP module 598 607 * … … 603 612 static void icmp_receiver(ipc_callid_t iid, ipc_call_t *icall) 604 613 { 614 bool loop = true; 605 615 packet_t *packet; 606 616 int rc; 607 617 608 while ( true) {618 while (loop) { 609 619 switch (IPC_GET_IMETHOD(*icall)) { 610 620 case NET_TL_RECEIVED: 611 rc = packet_translate_remote( icmp_globals.net_phone, &packet,621 rc = packet_translate_remote(phone_net, &packet, 612 622 IPC_GET_PACKET(*icall)); 613 if (rc == EOK) 614 rc = icmp_received_msg_local(IPC_GET_DEVICE(*icall), packet, 615 SERVICE_ICMP, IPC_GET_ERROR(*icall)); 623 if (rc == EOK) { 624 rc = icmp_process_packet(packet, IPC_GET_ERROR(*icall)); 625 if (rc != EOK) 626 icmp_release(packet); 627 } 616 628 617 ipc_answer_0(iid, (sysarg_t) rc);629 async_answer_0(iid, (sysarg_t) rc); 618 630 break; 631 case IPC_M_PHONE_HUNGUP: 632 loop = false; 633 continue; 619 634 default: 620 ipc_answer_0(iid, (sysarg_t) ENOTSUP);635 async_answer_0(iid, (sysarg_t) ENOTSUP); 621 636 } 622 637 … … 649 664 uint8_t *data; 650 665 651 fibril_rwlock_initialize(&icmp_globals.lock); 652 fibril_rwlock_write_lock(&icmp_globals.lock); 653 icmp_replies_initialize(&icmp_globals.replies); 654 icmp_echo_data_initialize(&icmp_globals.echo_data); 655 656 icmp_globals.net_phone = net_phone; 657 658 icmp_globals.ip_phone = ip_bind_service(SERVICE_IP, IPPROTO_ICMP, 659 SERVICE_ICMP, icmp_receiver); 660 if (icmp_globals.ip_phone < 0) { 661 fibril_rwlock_write_unlock(&icmp_globals.lock); 662 return icmp_globals.ip_phone; 663 } 664 665 int rc = ip_packet_size_req(icmp_globals.ip_phone, -1, 666 &icmp_globals.packet_dimension); 667 if (rc != EOK) { 668 fibril_rwlock_write_unlock(&icmp_globals.lock); 666 if (!hash_table_create(&replies, REPLY_BUCKETS, REPLY_KEYS, &reply_ops)) 667 return ENOMEM; 668 669 fibril_mutex_initialize(&reply_lock); 670 atomic_set(&icmp_client, 0); 671 672 phone_net = net_phone; 673 phone_ip = ip_bind_service(SERVICE_IP, IPPROTO_ICMP, SERVICE_ICMP, 674 icmp_receiver); 675 if (phone_ip < 0) 676 return phone_ip; 677 678 int rc = ip_packet_size_req(phone_ip, -1, &icmp_dimension); 679 if (rc != EOK) 669 680 return rc; 670 } 671 672 icmp_globals.packet_dimension.prefix += ICMP_HEADER_SIZE; 673 icmp_globals.packet_dimension.content -= ICMP_HEADER_SIZE; 674 675 icmp_globals.error_reporting = NET_DEFAULT_ICMP_ERROR_REPORTING; 676 icmp_globals.echo_replying = NET_DEFAULT_ICMP_ECHO_REPLYING; 681 682 icmp_dimension.prefix += ICMP_HEADER_SIZE; 683 icmp_dimension.content -= ICMP_HEADER_SIZE; 677 684 678 685 /* Get configuration */ 679 686 configuration = &names[0]; 680 rc = net_get_conf_req(icmp_globals.net_phone, &configuration, count, 681 &data); 682 if (rc != EOK) { 683 fibril_rwlock_write_unlock(&icmp_globals.lock); 687 rc = net_get_conf_req(phone_net, &configuration, count, &data); 688 if (rc != EOK) 684 689 return rc; 685 }686 690 687 691 if (configuration) { 688 if (configuration[0].value) { 689 icmp_globals.error_reporting = 690 (configuration[0].value[0] == 'y'); 691 } 692 if (configuration[1].value) { 693 icmp_globals.echo_replying = 694 (configuration[1].value[0] == 'y'); 695 } 692 if (configuration[0].value) 693 error_reporting = (configuration[0].value[0] == 'y'); 694 695 if (configuration[1].value) 696 echo_replying = (configuration[1].value[0] == 'y'); 697 696 698 net_free_settings(configuration, data); 697 699 } 698 700 699 fibril_rwlock_write_unlock(&icmp_globals.lock);700 701 return EOK; 701 702 } 702 703 703 /** Processes the generic client messages. 704 * 705 * @param[in] call The message parameters. 706 * @return EOK on success. 707 * @return ENOTSUP if the message is not known. 708 * @return Other error codes as defined for the packet_translate() 709 * function. 710 * @return Other error codes as defined for the 711 * icmp_destination_unreachable_msg_local() function. 712 * @return Other error codes as defined for the 713 * icmp_source_quench_msg_local() function. 714 * @return Other error codes as defined for the 715 * icmp_time_exceeded_msg_local() function. 716 * @return Other error codes as defined for the 717 * icmp_parameter_problem_msg_local() function. 718 * 719 * @see icmp_interface.h 720 */ 721 static int icmp_process_message(ipc_call_t *call) 722 { 704 /** Per-connection initialization 705 * 706 * Initialize client-specific global variables. 707 * 708 */ 709 void tl_connection(void) 710 { 711 icmp_id = (icmp_param_t) atomic_postinc(&icmp_client); 712 icmp_seq = 1; 713 } 714 715 /** Process the ICMP message. 716 * 717 * @param[in] callid Message identifier. 718 * @param[in] call Message parameters. 719 * @param[out] answer Answer. 720 * @param[out] count Number of arguments of the answer. 721 * 722 * @return EOK on success. 723 * @return ENOTSUP if the message is not known. 724 * @return Other error codes as defined for the packet_translate() 725 * function. 726 * @return Other error codes as defined for the 727 * icmp_destination_unreachable() function. 728 * @return Other error codes as defined for the 729 * icmp_source_quench() function. 730 * @return Other error codes as defined for the 731 * icmp_time_exceeded() function. 732 * @return Other error codes as defined for the 733 * icmp_parameter_problem() function. 734 * 735 * @see icmp_remote.h 736 * @see IS_NET_ICMP_MESSAGE() 737 * 738 */ 739 int tl_message(ipc_callid_t callid, ipc_call_t *call, 740 ipc_call_t *answer, size_t *count) 741 { 742 struct sockaddr *addr; 743 size_t size; 723 744 packet_t *packet; 724 745 int rc; 725 746 747 *count = 0; 748 726 749 switch (IPC_GET_IMETHOD(*call)) { 750 case NET_ICMP_ECHO: 751 rc = async_data_write_accept((void **) &addr, false, 0, 0, 0, &size); 752 if (rc != EOK) 753 return rc; 754 755 rc = icmp_echo(icmp_id, icmp_seq, ICMP_GET_SIZE(*call), 756 ICMP_GET_TIMEOUT(*call), ICMP_GET_TTL(*call), 757 ICMP_GET_TOS(*call), ICMP_GET_DONT_FRAGMENT(*call), 758 addr, (socklen_t) size); 759 760 free(addr); 761 icmp_seq++; 762 return rc; 763 727 764 case NET_ICMP_DEST_UNREACH: 728 rc = packet_translate_remote( icmp_globals.net_phone, &packet,765 rc = packet_translate_remote(phone_net, &packet, 729 766 IPC_GET_PACKET(*call)); 730 767 if (rc != EOK) 731 768 return rc; 732 return icmp_destination_unreachable_msg_local(0, 733 ICMP_GET_CODE(*call), ICMP_GET_MTU(*call), packet); 769 770 return icmp_destination_unreachable(ICMP_GET_CODE(*call), 771 ICMP_GET_MTU(*call), packet); 772 734 773 case NET_ICMP_SOURCE_QUENCH: 735 rc = packet_translate_remote( icmp_globals.net_phone, &packet,774 rc = packet_translate_remote(phone_net, &packet, 736 775 IPC_GET_PACKET(*call)); 737 776 if (rc != EOK) 738 777 return rc; 739 return icmp_source_quench_msg_local(0, packet); 778 779 return icmp_source_quench(packet); 780 740 781 case NET_ICMP_TIME_EXCEEDED: 741 rc = packet_translate_remote( icmp_globals.net_phone, &packet,782 rc = packet_translate_remote(phone_net, &packet, 742 783 IPC_GET_PACKET(*call)); 743 784 if (rc != EOK) 744 785 return rc; 745 return icmp_time_exceeded_msg_local(0, ICMP_GET_CODE(*call), 746 packet); 786 787 return icmp_time_exceeded(ICMP_GET_CODE(*call), packet); 788 747 789 case NET_ICMP_PARAMETERPROB: 748 rc = packet_translate_remote( icmp_globals.net_phone, &packet,790 rc = packet_translate_remote(phone_net, &packet, 749 791 IPC_GET_PACKET(*call)); 750 792 if (rc != EOK) 751 793 return rc; 752 return icmp_parameter_problem_msg_local(0, ICMP_GET_CODE(*call), 794 795 return icmp_parameter_problem(ICMP_GET_CODE(*call), 753 796 ICMP_GET_POINTER(*call), packet); 754 default:755 return ENOTSUP;756 }757 }758 759 /** Assigns a new identifier for the connection.760 *761 * Fills the echo data parameter with the assigned values.762 *763 * @param[in,out] echo_data The echo data to be bound.764 * @return Index of the inserted echo data.765 * @return EBADMEM if the echo_data parameter is NULL.766 * @return ENOTCONN if no free identifier have been found.767 */768 static int icmp_bind_free_id(icmp_echo_t *echo_data)769 {770 icmp_param_t index;771 772 if (!echo_data)773 return EBADMEM;774 775 /* From the last used one */776 index = icmp_globals.last_used_id;777 do {778 index++;779 /* til the range end */780 if (index >= ICMP_FREE_IDS_END) {781 /* start from the range beginning */782 index = ICMP_FREE_IDS_START - 1;783 do {784 index++;785 /* til the last used one */786 if (index >= icmp_globals.last_used_id) {787 /* none found */788 return ENOTCONN;789 }790 } while(icmp_echo_data_find(&icmp_globals.echo_data,791 index) != NULL);792 793 /* Found, break immediately */794 break;795 }796 } while (icmp_echo_data_find(&icmp_globals.echo_data, index) != NULL);797 798 echo_data->identifier = index;799 echo_data->sequence_number = 0;800 801 return icmp_echo_data_add(&icmp_globals.echo_data, index, echo_data);802 }803 804 /** Processes the client messages.805 *806 * Remembers the assigned identifier and sequence numbers.807 * Runs until the client module disconnects.808 *809 * @param[in] callid The message identifier.810 * @param[in] call The message parameters.811 * @return EOK.812 *813 * @see icmp_interface.h814 * @see icmp_api.h815 */816 static int icmp_process_client_messages(ipc_callid_t callid, ipc_call_t call)817 {818 bool keep_on_going = true;819 ipc_call_t answer;820 size_t answer_count;821 size_t length;822 struct sockaddr *addr;823 ipc_callid_t data_callid;824 icmp_echo_t *echo_data;825 int rc = EOK;826 827 /*828 * Accept the connection829 * - Answer the first NET_ICMP_INIT call.830 */831 answer_count = 0;832 833 echo_data = (icmp_echo_t *) malloc(sizeof(*echo_data));834 if (!echo_data)835 return ENOMEM;836 837 /* Assign a new identifier */838 fibril_rwlock_write_lock(&icmp_globals.lock);839 rc = icmp_bind_free_id(echo_data);840 fibril_rwlock_write_unlock(&icmp_globals.lock);841 if (rc < 0) {842 free(echo_data);843 return rc;844 }845 846 while (keep_on_going) {847 /* Answer the call */848 answer_call(callid, rc, &answer, answer_count);849 850 /* Refresh data */851 refresh_answer(&answer, &answer_count);852 853 /* Get the next call */854 callid = async_get_call(&call);855 856 /* Process the call */857 switch (IPC_GET_IMETHOD(call)) {858 case IPC_M_PHONE_HUNGUP:859 keep_on_going = false;860 rc = EHANGUP;861 break;862 863 case NET_ICMP_ECHO:864 if (!async_data_write_receive(&data_callid, &length)) {865 rc = EINVAL;866 break;867 }868 869 addr = malloc(length);870 if (!addr) {871 rc = ENOMEM;872 break;873 }874 875 rc = async_data_write_finalize(data_callid, addr,876 length);877 if (rc != EOK) {878 free(addr);879 break;880 }881 882 fibril_rwlock_write_lock(&icmp_globals.lock);883 rc = icmp_echo(echo_data->identifier,884 echo_data->sequence_number, ICMP_GET_SIZE(call),885 ICMP_GET_TIMEOUT(call), ICMP_GET_TTL(call),886 ICMP_GET_TOS(call), ICMP_GET_DONT_FRAGMENT(call),887 addr, (socklen_t) length);888 fibril_rwlock_write_unlock(&icmp_globals.lock);889 890 free(addr);891 892 if (echo_data->sequence_number < UINT16_MAX)893 echo_data->sequence_number++;894 else895 echo_data->sequence_number = 0;896 897 break;898 899 default:900 rc = icmp_process_message(&call);901 }902 903 }904 905 /* Release the identifier */906 fibril_rwlock_write_lock(&icmp_globals.lock);907 icmp_echo_data_exclude(&icmp_globals.echo_data, echo_data->identifier);908 fibril_rwlock_write_unlock(&icmp_globals.lock);909 910 return rc;911 }912 913 /** Processes the ICMP message.914 *915 * @param[in] callid The message identifier.916 * @param[in] call The message parameters.917 * @param[out] answer The message answer parameters.918 * @param[out] answer_count The last parameter for the actual answer in the919 * answer parameter.920 * @return EOK on success.921 * @return ENOTSUP if the message is not known.922 *923 * @see icmp_interface.h924 * @see IS_NET_ICMP_MESSAGE()925 */926 int tl_module_message (ipc_callid_t callid, ipc_call_t *call,927 ipc_call_t *answer, size_t *answer_count)928 {929 *answer_count = 0;930 switch (IPC_GET_IMETHOD(*call)) {931 case NET_ICMP_INIT:932 return icmp_process_client_messages(callid, *call);933 default:934 return icmp_process_message(call);935 797 } 936 798
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