Changes in uspace/srv/net/tl/icmp/icmp.c [8e3a65c:46d4d9f] in mainline
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uspace/srv/net/tl/icmp/icmp.c (modified) (9 diffs)
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uspace/srv/net/tl/icmp/icmp.c
r8e3a65c r46d4d9f 28 28 29 29 /** @addtogroup icmp 30 * 30 * @{ 31 31 */ 32 32 33 33 /** @file 34 * ICMP module implementation. 35 * @see icmp.h 36 */ 34 * ICMP module implementation. 35 * @see icmp.h 36 */ 37 38 #include "icmp.h" 39 #include "icmp_module.h" 37 40 38 41 #include <async.h> … … 51 54 #include <byteorder.h> 52 55 #include <errno.h> 53 #include <err.h>54 56 55 57 #include <net/socket_codes.h> 56 58 #include <net/ip_protocols.h> 57 59 #include <net/inet.h> 58 59 60 #include <net/modules.h> 61 #include <net/icmp_api.h> 62 #include <net/icmp_codes.h> 63 #include <net/icmp_common.h> 64 60 65 #include <packet_client.h> 61 66 #include <packet_remote.h> 62 67 #include <net_checksum.h> 63 #include <net/icmp_api.h>64 68 #include <icmp_client.h> 65 #include <net/icmp_codes.h>66 #include <net/icmp_common.h>67 69 #include <icmp_interface.h> 68 70 #include <il_interface.h> … … 74 76 #include <icmp_header.h> 75 77 76 #include "icmp.h" 77 #include "icmp_module.h" 78 79 /** ICMP module name. 80 */ 78 /** ICMP module name. */ 81 79 #define NAME "ICMP protocol" 82 80 83 /** Default ICMP error reporting. 84 */ 81 /** Default ICMP error reporting. */ 85 82 #define NET_DEFAULT_ICMP_ERROR_REPORTING true 86 83 87 /** Default ICMP echo replying. 88 */ 84 /** Default ICMP echo replying. */ 89 85 #define NET_DEFAULT_ICMP_ECHO_REPLYING true 90 86 91 /** Original datagram length in bytes transfered to the error notification message. 87 /** Original datagram length in bytes transfered to the error notification 88 * message. 92 89 */ 93 90 #define ICMP_KEEP_LENGTH 8 94 91 95 /** Free identifier numbers pool start. 96 */ 92 /** Free identifier numbers pool start. */ 97 93 #define ICMP_FREE_IDS_START 1 98 94 99 /** Free identifier numbers pool end. 100 */ 95 /** Free identifier numbers pool end. */ 101 96 #define ICMP_FREE_IDS_END UINT16_MAX 102 97 103 98 /** Computes the ICMP datagram checksum. 104 * @param[in,out] header The ICMP datagram header. 105 * @param[in] length The total datagram length. 106 * @returns The computed checksum. 107 */ 108 #define ICMP_CHECKSUM(header, length) htons(ip_checksum((uint8_t *) (header), (length))) 109 110 /** An echo request datagrams pattern. 111 */ 112 #define ICMP_ECHO_TEXT "Hello from HelenOS." 99 * 100 * @param[in,out] header The ICMP datagram header. 101 * @param[in] length The total datagram length. 102 * @return The computed checksum. 103 */ 104 #define ICMP_CHECKSUM(header, length) \ 105 htons(ip_checksum((uint8_t *) (header), (length))) 106 107 /** An echo request datagrams pattern. */ 108 #define ICMP_ECHO_TEXT "Hello from HelenOS." 113 109 114 110 /** Computes an ICMP reply data key. 115 * @param[in] id The message identifier. 116 * @param[in] sequence The message sequence number. 117 * @returns The computed ICMP reply data key. 118 */ 119 #define ICMP_GET_REPLY_KEY(id, sequence) (((id) << 16) | (sequence &0xFFFF)) 120 121 /** Processes the received ICMP packet. 122 * Is used as an entry point from the underlying IP module. 123 * Releases the packet on error. 124 * @param device_id The device identifier. Ignored parameter. 125 * @param[in,out] packet The received packet. 126 * @param receiver The target service. Ignored parameter. 127 * @param[in] error The packet error reporting service. Prefixes the received packet. 128 * @returns EOK on success. 129 * @returns Other error codes as defined for the icmp_process_packet() function. 130 */ 131 int icmp_received_msg(device_id_t device_id, packet_t packet, services_t receiver, services_t error); 132 133 /** Processes the received ICMP packet. 134 * Notifies the destination socket application. 135 * @param[in,out] packet The received packet. 136 * @param[in] error The packet error reporting service. Prefixes the received packet. 137 * @returns EOK on success. 138 * @returns EINVAL if the packet is not valid. 139 * @returns EINVAL if the stored packet address is not the an_addr_t. 140 * @returns EINVAL if the packet does not contain any data. 141 * @returns NO_DATA if the packet content is shorter than the user datagram header. 142 * @returns ENOMEM if there is not enough memory left. 143 * @returns EADDRNOTAVAIL if the destination socket does not exist. 144 * @returns Other error codes as defined for the ip_client_process_packet() function. 145 */ 146 int icmp_process_packet(packet_t packet, services_t error); 147 148 /** Processes the client messages. 149 * Remembers the assigned identifier and sequence numbers. 150 * Runs until the client module disconnects. 151 * @param[in] callid The message identifier. 152 * @param[in] call The message parameters. 153 * @returns EOK. 154 * @see icmp_interface.h 155 * @see icmp_api.h 156 */ 157 int icmp_process_client_messages(ipc_callid_t callid, ipc_call_t call); 158 159 /** Processes the generic client messages. 160 * @param[in] call The message parameters. 161 * @returns EOK on success. 162 * @returns ENOTSUP if the message is not known. 163 * @returns Other error codes as defined for the packet_translate() function. 164 * @returns Other error codes as defined for the icmp_destination_unreachable_msg() function. 165 * @returns Other error codes as defined for the icmp_source_quench_msg() function. 166 * @returns Other error codes as defined for the icmp_time_exceeded_msg() function. 167 * @returns Other error codes as defined for the icmp_parameter_problem_msg() function. 168 * @see icmp_interface.h 169 */ 170 int icmp_process_message(ipc_call_t * call); 111 * 112 * @param[in] id The message identifier. 113 * @param[in] sequence The message sequence number. 114 * @return The computed ICMP reply data key. 115 */ 116 #define ICMP_GET_REPLY_KEY(id, sequence) \ 117 (((id) << 16) | (sequence & 0xFFFF)) 118 119 120 /** ICMP global data. */ 121 icmp_globals_t icmp_globals; 122 123 INT_MAP_IMPLEMENT(icmp_replies, icmp_reply_t); 124 INT_MAP_IMPLEMENT(icmp_echo_data, icmp_echo_t); 171 125 172 126 /** Releases the packet and returns the result. 173 * @param[in] packet The packet queue to be released. 174 * @param[in] result The result to be returned. 175 * @returns The result parameter. 176 */ 177 int icmp_release_and_return(packet_t packet, int result); 127 * 128 * @param[in] packet The packet queue to be released. 129 * @param[in] result The result to be returned. 130 * @return The result parameter. 131 */ 132 static int icmp_release_and_return(packet_t *packet, int result) 133 { 134 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 135 return result; 136 } 137 138 /** Sends the ICMP message. 139 * 140 * Sets the message type and code and computes the checksum. 141 * Error messages are sent only if allowed in the configuration. 142 * Releases the packet on errors. 143 * 144 * @param[in] type The message type. 145 * @param[in] code The message code. 146 * @param[in] packet The message packet to be sent. 147 * @param[in] header The ICMP header. 148 * @param[in] error The error service to be announced. Should be 149 * SERVICE_ICMP or zero. 150 * @param[in] ttl The time to live. 151 * @param[in] tos The type of service. 152 * @param[in] dont_fragment The value indicating whether the datagram must not 153 * be fragmented. Is used as a MTU discovery. 154 * @return EOK on success. 155 * @return EPERM if the error message is not allowed. 156 */ 157 static int icmp_send_packet(icmp_type_t type, icmp_code_t code, packet_t *packet, 158 icmp_header_t *header, services_t error, ip_ttl_t ttl, ip_tos_t tos, 159 int dont_fragment) 160 { 161 int rc; 162 163 /* Do not send an error if disabled */ 164 if (error && !icmp_globals.error_reporting) 165 return icmp_release_and_return(packet, EPERM); 166 167 header->type = type; 168 header->code = code; 169 header->checksum = 0; 170 header->checksum = ICMP_CHECKSUM(header, 171 packet_get_data_length(packet)); 172 173 rc = ip_client_prepare_packet(packet, IPPROTO_ICMP, ttl, tos, 174 dont_fragment, 0); 175 if (rc != EOK) 176 return icmp_release_and_return(packet, rc); 177 178 return ip_send_msg(icmp_globals.ip_phone, -1, packet, SERVICE_ICMP, 179 error); 180 } 181 182 /** Prepares the ICMP error packet. 183 * 184 * Truncates the original packet if longer than ICMP_KEEP_LENGTH bytes. 185 * Prefixes and returns the ICMP header. 186 * 187 * @param[in,out] packet The original packet. 188 * @return The prefixed ICMP header. 189 * @return NULL on errors. 190 */ 191 static icmp_header_t *icmp_prepare_packet(packet_t *packet) 192 { 193 icmp_header_t *header; 194 size_t header_length; 195 size_t total_length; 196 197 total_length = packet_get_data_length(packet); 198 if (total_length <= 0) 199 return NULL; 200 201 header_length = ip_client_header_length(packet); 202 if (header_length <= 0) 203 return NULL; 204 205 /* Truncate if longer than 64 bits (without the IP header) */ 206 if ((total_length > header_length + ICMP_KEEP_LENGTH) && 207 (packet_trim(packet, 0, 208 total_length - header_length - ICMP_KEEP_LENGTH) != EOK)) { 209 return NULL; 210 } 211 212 header = PACKET_PREFIX(packet, icmp_header_t); 213 if (!header) 214 return NULL; 215 216 bzero(header, sizeof(*header)); 217 return header; 218 } 178 219 179 220 /** Requests an echo message. 180 * Sends a packet with specified parameters to the target host and waits for the reply upto the given timeout. 181 * Blocks the caller until the reply or the timeout occurs. 182 * @param[in] id The message identifier. 183 * @param[in] sequence The message sequence parameter. 184 * @param[in] size The message data length in bytes. 185 * @param[in] timeout The timeout in miliseconds. 186 * @param[in] ttl The time to live. 187 * @param[in] tos The type of service. 188 * @param[in] dont_fragment The value indicating whether the datagram must not be fragmented. Is used as a MTU discovery. 189 * @param[in] addr The target host address. 190 * @param[in] addrlen The torget host address length. 191 * @returns ICMP_ECHO on success. 192 * @returns ETIMEOUT if the reply has not arrived before the timeout. 193 * @returns ICMP type of the received error notification. 194 * @returns EINVAL if the addrlen parameter is less or equal to zero (<=0). 195 * @returns ENOMEM if there is not enough memory left. 196 * @returns EPARTY if there was an internal error. 197 */ 198 int icmp_echo(icmp_param_t id, icmp_param_t sequence, size_t size, mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, const struct sockaddr * addr, socklen_t addrlen); 199 200 /** Prepares the ICMP error packet. 201 * Truncates the original packet if longer than ICMP_KEEP_LENGTH bytes. 202 * Prefixes and returns the ICMP header. 203 * @param[in,out] packet The original packet. 204 * @returns The prefixed ICMP header. 205 * @returns NULL on errors. 206 */ 207 icmp_header_ref icmp_prepare_packet(packet_t packet); 208 209 /** Sends the ICMP message. 210 * Sets the message type and code and computes the checksum. 211 * Error messages are sent only if allowed in the configuration. 212 * Releases the packet on errors. 213 * @param[in] type The message type. 214 * @param[in] code The message code. 215 * @param[in] packet The message packet to be sent. 216 * @param[in] header The ICMP header. 217 * @param[in] error The error service to be announced. Should be SERVICE_ICMP or zero (0). 218 * @param[in] ttl The time to live. 219 * @param[in] tos The type of service. 220 * @param[in] dont_fragment The value indicating whether the datagram must not be fragmented. Is used as a MTU discovery. 221 * @returns EOK on success. 222 * @returns EPERM if the error message is not allowed. 223 */ 224 int icmp_send_packet(icmp_type_t type, icmp_code_t code, packet_t packet, icmp_header_ref header, services_t error, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment); 225 226 /** Tries to set the pending reply result as the received message type. 227 * If the reply data is not present, the reply timed out and the other fibril 228 * is already awake. 229 * Releases the packet. 230 * @param[in] packet The received reply message. 231 * @param[in] header The ICMP message header. 232 * @param[in] type The received reply message type. 233 * @param[in] code The received reply message code. 234 * @returns EOK. 235 */ 236 int icmp_process_echo_reply(packet_t packet, icmp_header_ref header, icmp_type_t type, icmp_code_t code); 237 238 /** Assigns a new identifier for the connection. 239 * Fills the echo data parameter with the assigned values. 240 * @param[in,out] echo_data The echo data to be bound. 241 * @returns Index of the inserted echo data. 242 * @returns EBADMEM if the echo_data parameter is NULL. 243 * @returns ENOTCONN if no free identifier have been found. 244 */ 245 int icmp_bind_free_id(icmp_echo_ref echo_data); 246 247 /** ICMP global data. 248 */ 249 icmp_globals_t icmp_globals; 250 251 INT_MAP_IMPLEMENT(icmp_replies, icmp_reply_t); 252 253 INT_MAP_IMPLEMENT(icmp_echo_data, icmp_echo_t); 254 255 int icmp_echo_msg(int icmp_phone, size_t size, mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, const struct sockaddr * addr, socklen_t addrlen){ 256 icmp_echo_ref echo_data; 257 int res; 258 259 fibril_rwlock_write_lock(&icmp_globals.lock); 260 // use the phone as the echo data index 261 echo_data = icmp_echo_data_find(&icmp_globals.echo_data, icmp_phone); 262 if(! echo_data){ 263 res = ENOENT; 264 }else{ 265 res = icmp_echo(echo_data->identifier, echo_data->sequence_number, size, timeout, ttl, tos, dont_fragment, addr, addrlen); 266 if(echo_data->sequence_number < UINT16_MAX){ 267 ++ echo_data->sequence_number; 268 }else{ 269 echo_data->sequence_number = 0; 270 } 271 } 272 fibril_rwlock_write_unlock(&icmp_globals.lock); 273 return res; 274 } 275 276 int icmp_echo(icmp_param_t id, icmp_param_t sequence, size_t size, mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, const struct sockaddr * addr, socklen_t addrlen){ 277 ERROR_DECLARE; 278 279 icmp_header_ref header; 280 packet_t packet; 221 * 222 * Sends a packet with specified parameters to the target host and waits for 223 * the reply upto the given timeout. 224 * Blocks the caller until the reply or the timeout occurs. 225 * 226 * @param[in] id The message identifier. 227 * @param[in] sequence The message sequence parameter. 228 * @param[in] size The message data length in bytes. 229 * @param[in] timeout The timeout in miliseconds. 230 * @param[in] ttl The time to live. 231 * @param[in] tos The type of service. 232 * @param[in] dont_fragment The value indicating whether the datagram must not 233 * be fragmented. Is used as a MTU discovery. 234 * @param[in] addr The target host address. 235 * @param[in] addrlen The torget host address length. 236 * @return ICMP_ECHO on success. 237 * @return ETIMEOUT if the reply has not arrived before the 238 * timeout. 239 * @return ICMP type of the received error notification. 240 * @return EINVAL if the addrlen parameter is less or equal to 241 * zero. 242 * @return ENOMEM if there is not enough memory left. 243 * @return EPARTY if there was an internal error. 244 */ 245 static int icmp_echo(icmp_param_t id, icmp_param_t sequence, size_t size, 246 mseconds_t timeout, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, 247 const struct sockaddr * addr, socklen_t addrlen) 248 { 249 icmp_header_t *header; 250 packet_t *packet; 281 251 size_t length; 282 uint8_t * 283 icmp_reply_ refreply;252 uint8_t *data; 253 icmp_reply_t *reply; 284 254 int reply_key; 285 int result;286 255 int index; 287 288 if(addrlen <= 0){ 256 int rc; 257 258 if (addrlen <= 0) 289 259 return EINVAL; 290 } 260 291 261 length = (size_t) addrlen; 292 // TODO do not ask all the time 293 ERROR_PROPAGATE(ip_packet_size_req(icmp_globals.ip_phone, -1, &icmp_globals.packet_dimension)); 294 packet = packet_get_4_remote(icmp_globals.net_phone, size, icmp_globals.packet_dimension.addr_len, ICMP_HEADER_SIZE + icmp_globals.packet_dimension.prefix, icmp_globals.packet_dimension.suffix); 295 if(! packet){ 262 /* TODO do not ask all the time */ 263 rc = ip_packet_size_req(icmp_globals.ip_phone, -1, 264 &icmp_globals.packet_dimension); 265 if (rc != EOK) 266 return rc; 267 268 packet = packet_get_4_remote(icmp_globals.net_phone, size, 269 icmp_globals.packet_dimension.addr_len, 270 ICMP_HEADER_SIZE + icmp_globals.packet_dimension.prefix, 271 icmp_globals.packet_dimension.suffix); 272 if (!packet) 296 273 return ENOMEM; 297 } 298 299 // prepare the requesting packet 300 // set the destination address 301 if(ERROR_OCCURRED(packet_set_addr(packet, NULL, (const uint8_t *) addr, length))){ 302 return icmp_release_and_return(packet, ERROR_CODE); 303 } 304 // allocate space in the packet 274 275 /* Prepare the requesting packet, set the destination address. */ 276 rc = packet_set_addr(packet, NULL, (const uint8_t *) addr, length); 277 if (rc != EOK) 278 return icmp_release_and_return(packet, rc); 279 280 /* Allocate space in the packet */ 305 281 data = (uint8_t *) packet_suffix(packet, size); 306 if (! data){282 if (!data) 307 283 return icmp_release_and_return(packet, ENOMEM); 308 } 309 / / fill the data284 285 /* Fill the data */ 310 286 length = 0; 311 while (size > length + sizeof(ICMP_ECHO_TEXT)){287 while (size > length + sizeof(ICMP_ECHO_TEXT)) { 312 288 memcpy(data + length, ICMP_ECHO_TEXT, sizeof(ICMP_ECHO_TEXT)); 313 289 length += sizeof(ICMP_ECHO_TEXT); 314 290 } 315 291 memcpy(data + length, ICMP_ECHO_TEXT, size - length); 316 // prefix the header 292 293 /* Prefix the header */ 317 294 header = PACKET_PREFIX(packet, icmp_header_t); 318 if (! header){295 if (!header) 319 296 return icmp_release_and_return(packet, ENOMEM); 320 } 297 321 298 bzero(header, sizeof(*header)); 322 299 header->un.echo.identifier = id; 323 300 header->un.echo.sequence_number = sequence; 324 301 325 / / prepare the reply structure302 /* Prepare the reply structure */ 326 303 reply = malloc(sizeof(*reply)); 327 if (! reply){304 if (!reply) 328 305 return icmp_release_and_return(packet, ENOMEM); 329 } 306 330 307 fibril_mutex_initialize(&reply->mutex); 331 308 fibril_mutex_lock(&reply->mutex); 332 309 fibril_condvar_initialize(&reply->condvar); 333 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, header->un.echo.sequence_number); 310 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, 311 header->un.echo.sequence_number); 334 312 index = icmp_replies_add(&icmp_globals.replies, reply_key, reply); 335 if (index < 0){313 if (index < 0) { 336 314 free(reply); 337 315 return icmp_release_and_return(packet, index); 338 316 } 339 317 340 / / unlock the globals so that we can wait for the reply318 /* Unlock the globals so that we can wait for the reply */ 341 319 fibril_rwlock_write_unlock(&icmp_globals.lock); 342 320 343 // send the request 344 icmp_send_packet(ICMP_ECHO, 0, packet, header, 0, ttl, tos, dont_fragment); 345 346 // wait for the reply 347 // timeout in microseconds 348 if(ERROR_OCCURRED(fibril_condvar_wait_timeout(&reply->condvar, &reply->mutex, timeout * 1000))){ 349 result = ERROR_CODE; 350 }else{ 351 // read the result 352 result = reply->result; 353 } 354 355 // drop the reply mutex before locking the globals again 321 /* Send the request */ 322 icmp_send_packet(ICMP_ECHO, 0, packet, header, 0, ttl, tos, 323 dont_fragment); 324 325 /* Wait for the reply. Timeout in microseconds. */ 326 rc = fibril_condvar_wait_timeout(&reply->condvar, &reply->mutex, 327 timeout * 1000); 328 if (rc == EOK) 329 rc = reply->result; 330 331 /* Drop the reply mutex before locking the globals again */ 356 332 fibril_mutex_unlock(&reply->mutex); 357 333 fibril_rwlock_write_lock(&icmp_globals.lock); 358 334 359 / / destroy the reply structure335 /* Destroy the reply structure */ 360 336 icmp_replies_exclude_index(&icmp_globals.replies, index); 361 return result; 362 } 363 364 int icmp_destination_unreachable_msg(int icmp_phone, icmp_code_t code, icmp_param_t mtu, packet_t packet){ 365 icmp_header_ref header; 337 338 return rc; 339 } 340 341 static int icmp_destination_unreachable_msg_local(int icmp_phone, 342 icmp_code_t code, icmp_param_t mtu, packet_t *packet) 343 { 344 icmp_header_t *header; 366 345 367 346 header = icmp_prepare_packet(packet); 368 if (! header){347 if (!header) 369 348 return icmp_release_and_return(packet, ENOMEM); 370 } 371 if (mtu){349 350 if (mtu) 372 351 header->un.frag.mtu = mtu; 373 } 374 return icmp_send_packet(ICMP_DEST_UNREACH, code, packet, header, SERVICE_ICMP, 0, 0, 0); 375 } 376 377 int icmp_source_quench_msg(int icmp_phone, packet_t packet){ 378 icmp_header_ref header; 352 353 return icmp_send_packet(ICMP_DEST_UNREACH, code, packet, header, 354 SERVICE_ICMP, 0, 0, 0); 355 } 356 357 static int icmp_source_quench_msg_local(int icmp_phone, packet_t *packet) 358 { 359 icmp_header_t *header; 379 360 380 361 header = icmp_prepare_packet(packet); 381 if (! header){362 if (!header) 382 363 return icmp_release_and_return(packet, ENOMEM); 383 } 384 return icmp_send_packet(ICMP_SOURCE_QUENCH, 0, packet, header, SERVICE_ICMP, 0, 0, 0); 385 } 386 387 int icmp_time_exceeded_msg(int icmp_phone, icmp_code_t code, packet_t packet){ 388 icmp_header_ref header; 364 365 return icmp_send_packet(ICMP_SOURCE_QUENCH, 0, packet, header, 366 SERVICE_ICMP, 0, 0, 0); 367 } 368 369 static int icmp_time_exceeded_msg_local(int icmp_phone, icmp_code_t code, 370 packet_t *packet) 371 { 372 icmp_header_t *header; 389 373 390 374 header = icmp_prepare_packet(packet); 391 if (! header){375 if (!header) 392 376 return icmp_release_and_return(packet, ENOMEM); 393 } 394 return icmp_send_packet(ICMP_TIME_EXCEEDED, code, packet, header, SERVICE_ICMP, 0, 0, 0); 395 } 396 397 int icmp_parameter_problem_msg(int icmp_phone, icmp_code_t code, icmp_param_t pointer, packet_t packet){ 398 icmp_header_ref header; 377 378 return icmp_send_packet(ICMP_TIME_EXCEEDED, code, packet, header, 379 SERVICE_ICMP, 0, 0, 0); 380 } 381 382 static int icmp_parameter_problem_msg_local(int icmp_phone, icmp_code_t code, 383 icmp_param_t pointer, packet_t *packet) 384 { 385 icmp_header_t *header; 399 386 400 387 header = icmp_prepare_packet(packet); 401 if (! header){388 if (!header) 402 389 return icmp_release_and_return(packet, ENOMEM); 403 } 390 404 391 header->un.param.pointer = pointer; 405 return icmp_send_packet(ICMP_PARAMETERPROB, code, packet, header, SERVICE_ICMP, 0, 0, 0); 406 } 407 408 icmp_header_ref icmp_prepare_packet(packet_t packet){ 409 icmp_header_ref header; 410 size_t header_length; 411 size_t total_length; 412 413 total_length = packet_get_data_length(packet); 414 if(total_length <= 0){ 415 return NULL; 416 } 417 header_length = ip_client_header_length(packet); 418 if(header_length <= 0){ 419 return NULL; 420 } 421 // truncate if longer than 64 bits (without the IP header) 422 if((total_length > header_length + ICMP_KEEP_LENGTH) 423 && (packet_trim(packet, 0, total_length - header_length - ICMP_KEEP_LENGTH) != EOK)){ 424 return NULL; 425 } 426 header = PACKET_PREFIX(packet, icmp_header_t); 427 if(! header){ 428 return NULL; 429 } 430 bzero(header, sizeof(*header)); 431 return header; 432 } 433 434 int icmp_send_packet(icmp_type_t type, icmp_code_t code, packet_t packet, icmp_header_ref header, services_t error, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment){ 435 ERROR_DECLARE; 436 437 // do not send an error if disabled 438 if(error && (! icmp_globals.error_reporting)){ 439 return icmp_release_and_return(packet, EPERM); 440 } 441 header->type = type; 442 header->code = code; 443 header->checksum = 0; 444 header->checksum = ICMP_CHECKSUM(header, packet_get_data_length(packet)); 445 if(ERROR_OCCURRED(ip_client_prepare_packet(packet, IPPROTO_ICMP, ttl, tos, dont_fragment, 0))){ 446 return icmp_release_and_return(packet, ERROR_CODE); 447 } 448 return ip_send_msg(icmp_globals.ip_phone, -1, packet, SERVICE_ICMP, error); 449 } 450 451 int icmp_initialize(async_client_conn_t client_connection){ 452 ERROR_DECLARE; 453 454 measured_string_t names[] = {{str_dup("ICMP_ERROR_REPORTING"), 20}, {str_dup("ICMP_ECHO_REPLYING"), 18}}; 455 measured_string_ref configuration; 392 return icmp_send_packet(ICMP_PARAMETERPROB, code, packet, header, 393 SERVICE_ICMP, 0, 0, 0); 394 } 395 396 /** Initializes the ICMP module. 397 * 398 * @param[in] client_connection The client connection processing function. The 399 * module skeleton propagates its own one. 400 * @return EOK on success. 401 * @return ENOMEM if there is not enough memory left. 402 */ 403 int icmp_initialize(async_client_conn_t client_connection) 404 { 405 measured_string_t names[] = { 406 { 407 (char *) "ICMP_ERROR_REPORTING", 408 20 409 }, 410 { 411 (char *) "ICMP_ECHO_REPLYING", 412 18 413 } 414 }; 415 measured_string_t *configuration; 456 416 size_t count = sizeof(names) / sizeof(measured_string_t); 457 char * data; 417 char *data; 418 int rc; 458 419 459 420 fibril_rwlock_initialize(&icmp_globals.lock); … … 461 422 icmp_replies_initialize(&icmp_globals.replies); 462 423 icmp_echo_data_initialize(&icmp_globals.echo_data); 463 icmp_globals.ip_phone = ip_bind_service(SERVICE_IP, IPPROTO_ICMP, SERVICE_ICMP, client_connection); 464 if(icmp_globals.ip_phone < 0){ 424 425 icmp_globals.ip_phone = ip_bind_service(SERVICE_IP, IPPROTO_ICMP, 426 SERVICE_ICMP, client_connection); 427 if (icmp_globals.ip_phone < 0) { 428 fibril_rwlock_write_unlock(&icmp_globals.lock); 465 429 return icmp_globals.ip_phone; 466 430 } 467 ERROR_PROPAGATE(ip_packet_size_req(icmp_globals.ip_phone, -1, &icmp_globals.packet_dimension)); 431 432 rc = ip_packet_size_req(icmp_globals.ip_phone, -1, 433 &icmp_globals.packet_dimension); 434 if (rc != EOK) { 435 fibril_rwlock_write_unlock(&icmp_globals.lock); 436 return rc; 437 } 438 468 439 icmp_globals.packet_dimension.prefix += ICMP_HEADER_SIZE; 469 440 icmp_globals.packet_dimension.content -= ICMP_HEADER_SIZE; 470 // get configuration 441 471 442 icmp_globals.error_reporting = NET_DEFAULT_ICMP_ERROR_REPORTING; 472 443 icmp_globals.echo_replying = NET_DEFAULT_ICMP_ECHO_REPLYING; 444 445 /* Get configuration */ 473 446 configuration = &names[0]; 474 ERROR_PROPAGATE(net_get_conf_req(icmp_globals.net_phone, &configuration, count, &data)); 475 if(configuration){ 476 if(configuration[0].value){ 477 icmp_globals.error_reporting = (configuration[0].value[0] == 'y'); 447 rc = net_get_conf_req(icmp_globals.net_phone, &configuration, count, 448 &data); 449 if (rc != EOK) { 450 fibril_rwlock_write_unlock(&icmp_globals.lock); 451 return rc; 452 } 453 454 if (configuration) { 455 if (configuration[0].value) { 456 icmp_globals.error_reporting = 457 (configuration[0].value[0] == 'y'); 478 458 } 479 if(configuration[1].value){ 480 icmp_globals.echo_replying = (configuration[1].value[0] == 'y'); 459 if (configuration[1].value) { 460 icmp_globals.echo_replying = 461 (configuration[1].value[0] == 'y'); 481 462 } 482 463 net_free_settings(configuration, data); 483 464 } 465 484 466 fibril_rwlock_write_unlock(&icmp_globals.lock); 485 467 return EOK; 486 468 } 487 469 488 int icmp_received_msg(device_id_t device_id, packet_t packet, services_t receiver, services_t error){ 489 ERROR_DECLARE; 490 491 if(ERROR_OCCURRED(icmp_process_packet(packet, error))){ 492 return icmp_release_and_return(packet, ERROR_CODE); 493 } 494 495 return EOK; 496 } 497 498 int icmp_process_packet(packet_t packet, services_t error){ 499 ERROR_DECLARE; 500 470 /** Tries to set the pending reply result as the received message type. 471 * 472 * If the reply data is not present, the reply timed out and the other fibril 473 * is already awake. 474 * Releases the packet. 475 * 476 * @param[in] packet The received reply message. 477 * @param[in] header The ICMP message header. 478 * @param[in] type The received reply message type. 479 * @param[in] code The received reply message code. 480 */ 481 static void icmp_process_echo_reply(packet_t *packet, icmp_header_t *header, 482 icmp_type_t type, icmp_code_t code) 483 { 484 int reply_key; 485 icmp_reply_t *reply; 486 487 /* Compute the reply key */ 488 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, 489 header->un.echo.sequence_number); 490 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 491 492 /* Find the pending reply */ 493 fibril_rwlock_write_lock(&icmp_globals.lock); 494 reply = icmp_replies_find(&icmp_globals.replies, reply_key); 495 if (reply) { 496 reply->result = type; 497 fibril_condvar_signal(&reply->condvar); 498 } 499 fibril_rwlock_write_unlock(&icmp_globals.lock); 500 } 501 502 /** Processes the received ICMP packet. 503 * 504 * Notifies the destination socket application. 505 * 506 * @param[in,out] packet The received packet. 507 * @param[in] error The packet error reporting service. Prefixes the 508 * received packet. 509 * @return EOK on success. 510 * @return EINVAL if the packet is not valid. 511 * @return EINVAL if the stored packet address is not the an_addr_t. 512 * @return EINVAL if the packet does not contain any data. 513 * @return NO_DATA if the packet content is shorter than the user 514 * datagram header. 515 * @return ENOMEM if there is not enough memory left. 516 * @return EADDRNOTAVAIL if the destination socket does not exist. 517 * @return Other error codes as defined for the 518 * ip_client_process_packet() function. 519 */ 520 static int icmp_process_packet(packet_t *packet, services_t error) 521 { 501 522 size_t length; 502 uint8_t * 523 uint8_t *src; 503 524 int addrlen; 504 525 int result; 505 void * 506 icmp_header_ refheader;526 void *data; 527 icmp_header_t *header; 507 528 icmp_type_t type; 508 529 icmp_code_t code; 509 510 if(error){ 511 switch(error){ 512 case SERVICE_ICMP: 513 // process error 514 result = icmp_client_process_packet(packet, &type, &code, NULL, NULL); 515 if(result < 0){ 516 return result; 517 } 518 length = (size_t) result; 519 // remove the error header 520 ERROR_PROPAGATE(packet_trim(packet, length, 0)); 521 break; 522 default: 523 return ENOTSUP; 524 } 525 } 526 // get rid of the ip header 530 int rc; 531 532 switch (error) { 533 case SERVICE_NONE: 534 break; 535 case SERVICE_ICMP: 536 /* Process error */ 537 result = icmp_client_process_packet(packet, &type, &code, NULL, 538 NULL); 539 if (result < 0) 540 return result; 541 length = (size_t) result; 542 /* Remove the error header */ 543 rc = packet_trim(packet, length, 0); 544 if (rc != EOK) 545 return rc; 546 break; 547 default: 548 return ENOTSUP; 549 } 550 551 /* Get rid of the IP header */ 527 552 length = ip_client_header_length(packet); 528 ERROR_PROPAGATE(packet_trim(packet, length, 0)); 553 rc = packet_trim(packet, length, 0); 554 if (rc != EOK) 555 return rc; 529 556 530 557 length = packet_get_data_length(packet); 531 if (length <= 0){558 if (length <= 0) 532 559 return EINVAL; 533 } 534 if (length < ICMP_HEADER_SIZE){560 561 if (length < ICMP_HEADER_SIZE) 535 562 return EINVAL; 536 } 563 537 564 data = packet_get_data(packet); 538 if (! data){565 if (!data) 539 566 return EINVAL; 540 } 541 // get icmp header 542 header = (icmp_header_ref) data; 543 // checksum 544 if(header->checksum){ 545 while(ICMP_CHECKSUM(header, length) != IP_CHECKSUM_ZERO){ 546 // set the original message type on error notification 547 // type swap observed in Qemu 548 if(error){ 549 switch(header->type){ 550 case ICMP_ECHOREPLY: 551 header->type = ICMP_ECHO; 552 continue; 567 568 /* Get ICMP header */ 569 header = (icmp_header_t *) data; 570 571 if (header->checksum) { 572 while (ICMP_CHECKSUM(header, length) != IP_CHECKSUM_ZERO) { 573 /* 574 * Set the original message type on error notification. 575 * Type swap observed in Qemu. 576 */ 577 if (error) { 578 switch (header->type) { 579 case ICMP_ECHOREPLY: 580 header->type = ICMP_ECHO; 581 continue; 553 582 } 554 583 } … … 556 585 } 557 586 } 558 switch(header->type){ 559 case ICMP_ECHOREPLY: 560 if(error){ 561 return icmp_process_echo_reply(packet, header, type, code); 562 }else{ 563 return icmp_process_echo_reply(packet, header, ICMP_ECHO, 0); 587 588 switch (header->type) { 589 case ICMP_ECHOREPLY: 590 if (error) 591 icmp_process_echo_reply(packet, header, type, code); 592 else 593 icmp_process_echo_reply(packet, header, ICMP_ECHO, 0); 594 595 return EOK; 596 597 case ICMP_ECHO: 598 if (error) { 599 icmp_process_echo_reply(packet, header, type, code); 600 return EOK; 601 } 602 603 /* Do not send a reply if disabled */ 604 if (icmp_globals.echo_replying) { 605 addrlen = packet_get_addr(packet, &src, NULL); 606 607 /* 608 * Set both addresses to the source one (avoids the 609 * source address deletion before setting the 610 * destination one). 611 */ 612 if ((addrlen > 0) && (packet_set_addr(packet, src, src, 613 (size_t) addrlen) == EOK)) { 614 /* Send the reply */ 615 icmp_send_packet(ICMP_ECHOREPLY, 0, packet, 616 header, 0, 0, 0, 0); 617 return EOK; 564 618 } 565 case ICMP_ECHO: 566 if(error){ 567 return icmp_process_echo_reply(packet, header, type, code); 568 // do not send a reply if disabled 569 }else if(icmp_globals.echo_replying){ 570 addrlen = packet_get_addr(packet, &src, NULL); 571 if((addrlen > 0) 572 // set both addresses to the source one (avoids the source address deletion before setting the destination one) 573 && (packet_set_addr(packet, src, src, (size_t) addrlen) == EOK)){ 574 // send the reply 575 icmp_send_packet(ICMP_ECHOREPLY, 0, packet, header, 0, 0, 0, 0); 576 return EOK; 577 }else{ 578 return EINVAL; 619 620 return EINVAL; 621 } 622 623 return EPERM; 624 625 case ICMP_DEST_UNREACH: 626 case ICMP_SOURCE_QUENCH: 627 case ICMP_REDIRECT: 628 case ICMP_ALTERNATE_ADDR: 629 case ICMP_ROUTER_ADV: 630 case ICMP_ROUTER_SOL: 631 case ICMP_TIME_EXCEEDED: 632 case ICMP_PARAMETERPROB: 633 case ICMP_CONVERSION_ERROR: 634 case ICMP_REDIRECT_MOBILE: 635 case ICMP_SKIP: 636 case ICMP_PHOTURIS: 637 ip_received_error_msg(icmp_globals.ip_phone, -1, packet, 638 SERVICE_IP, SERVICE_ICMP); 639 return EOK; 640 641 default: 642 return ENOTSUP; 643 } 644 } 645 646 /** Processes the received ICMP packet. 647 * 648 * Is used as an entry point from the underlying IP module. 649 * Releases the packet on error. 650 * 651 * @param device_id The device identifier. Ignored parameter. 652 * @param[in,out] packet The received packet. 653 * @param receiver The target service. Ignored parameter. 654 * @param[in] error The packet error reporting service. Prefixes the 655 * received packet. 656 * @return EOK on success. 657 * @return Other error codes as defined for the 658 * icmp_process_packet() function. 659 */ 660 static int icmp_received_msg_local(device_id_t device_id, packet_t *packet, 661 services_t receiver, services_t error) 662 { 663 int rc; 664 665 rc = icmp_process_packet(packet, error); 666 if (rc != EOK) 667 return icmp_release_and_return(packet, rc); 668 669 return EOK; 670 } 671 672 /** Processes the generic client messages. 673 * 674 * @param[in] call The message parameters. 675 * @return EOK on success. 676 * @return ENOTSUP if the message is not known. 677 * @return Other error codes as defined for the packet_translate() 678 * function. 679 * @return Other error codes as defined for the 680 * icmp_destination_unreachable_msg_local() function. 681 * @return Other error codes as defined for the 682 * icmp_source_quench_msg_local() function. 683 * @return Other error codes as defined for the 684 * icmp_time_exceeded_msg_local() function. 685 * @return Other error codes as defined for the 686 * icmp_parameter_problem_msg_local() function. 687 * 688 * @see icmp_interface.h 689 */ 690 static int icmp_process_message(ipc_call_t *call) 691 { 692 packet_t *packet; 693 int rc; 694 695 switch (IPC_GET_METHOD(*call)) { 696 case NET_ICMP_DEST_UNREACH: 697 rc = packet_translate_remote(icmp_globals.net_phone, &packet, 698 IPC_GET_PACKET(call)); 699 if (rc != EOK) 700 return rc; 701 return icmp_destination_unreachable_msg_local(0, 702 ICMP_GET_CODE(call), ICMP_GET_MTU(call), packet); 703 case NET_ICMP_SOURCE_QUENCH: 704 rc = packet_translate_remote(icmp_globals.net_phone, &packet, 705 IPC_GET_PACKET(call)); 706 if (rc != EOK) 707 return rc; 708 return icmp_source_quench_msg_local(0, packet); 709 case NET_ICMP_TIME_EXCEEDED: 710 rc = packet_translate_remote(icmp_globals.net_phone, &packet, 711 IPC_GET_PACKET(call)); 712 if (rc != EOK) 713 return rc; 714 return icmp_time_exceeded_msg_local(0, ICMP_GET_CODE(call), 715 packet); 716 case NET_ICMP_PARAMETERPROB: 717 rc = packet_translate_remote(icmp_globals.net_phone, &packet, 718 IPC_GET_PACKET(call)); 719 if (rc != EOK) 720 return rc; 721 return icmp_parameter_problem_msg_local(0, ICMP_GET_CODE(call), 722 ICMP_GET_POINTER(call), packet); 723 default: 724 return ENOTSUP; 725 } 726 } 727 728 /** Assigns a new identifier for the connection. 729 * 730 * Fills the echo data parameter with the assigned values. 731 * 732 * @param[in,out] echo_data The echo data to be bound. 733 * @return Index of the inserted echo data. 734 * @return EBADMEM if the echo_data parameter is NULL. 735 * @return ENOTCONN if no free identifier have been found. 736 */ 737 static int icmp_bind_free_id(icmp_echo_t *echo_data) 738 { 739 icmp_param_t index; 740 741 if (!echo_data) 742 return EBADMEM; 743 744 /* From the last used one */ 745 index = icmp_globals.last_used_id; 746 do { 747 index++; 748 /* til the range end */ 749 if (index >= ICMP_FREE_IDS_END) { 750 /* start from the range beginning */ 751 index = ICMP_FREE_IDS_START - 1; 752 do { 753 index++; 754 /* til the last used one */ 755 if (index >= icmp_globals.last_used_id) { 756 /* none found */ 757 return ENOTCONN; 579 758 } 580 }else{ 581 return EPERM; 582 } 583 case ICMP_DEST_UNREACH: 584 case ICMP_SOURCE_QUENCH: 585 case ICMP_REDIRECT: 586 case ICMP_ALTERNATE_ADDR: 587 case ICMP_ROUTER_ADV: 588 case ICMP_ROUTER_SOL: 589 case ICMP_TIME_EXCEEDED: 590 case ICMP_PARAMETERPROB: 591 case ICMP_CONVERSION_ERROR: 592 case ICMP_REDIRECT_MOBILE: 593 case ICMP_SKIP: 594 case ICMP_PHOTURIS: 595 ip_received_error_msg(icmp_globals.ip_phone, -1, packet, SERVICE_IP, SERVICE_ICMP); 596 return EOK; 597 default: 598 return ENOTSUP; 599 } 600 } 601 602 int icmp_process_echo_reply(packet_t packet, icmp_header_ref header, icmp_type_t type, icmp_code_t code){ 603 int reply_key; 604 icmp_reply_ref reply; 605 606 // compute the reply key 607 reply_key = ICMP_GET_REPLY_KEY(header->un.echo.identifier, header->un.echo.sequence_number); 608 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 609 // lock the globals 610 fibril_rwlock_write_lock(&icmp_globals.lock); 611 // find the pending reply 612 reply = icmp_replies_find(&icmp_globals.replies, reply_key); 613 if(reply){ 614 // set the result 615 reply->result = type; 616 // notify the waiting fibril 617 fibril_condvar_signal(&reply->condvar); 618 } 619 fibril_rwlock_write_unlock(&icmp_globals.lock); 620 return EOK; 621 } 622 623 int icmp_message_standalone(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count){ 624 ERROR_DECLARE; 625 626 packet_t packet; 627 628 *answer_count = 0; 629 switch(IPC_GET_METHOD(*call)){ 630 case NET_TL_RECEIVED: 631 if(! ERROR_OCCURRED(packet_translate_remote(icmp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){ 632 ERROR_CODE = icmp_received_msg(IPC_GET_DEVICE(call), packet, SERVICE_ICMP, IPC_GET_ERROR(call)); 633 } 634 return ERROR_CODE; 635 case NET_ICMP_INIT: 636 return icmp_process_client_messages(callid, * call); 637 default: 638 return icmp_process_message(call); 639 } 640 return ENOTSUP; 641 } 642 643 int icmp_process_client_messages(ipc_callid_t callid, ipc_call_t call){ 644 ERROR_DECLARE; 645 759 } while(icmp_echo_data_find(&icmp_globals.echo_data, 760 index) != NULL); 761 762 /* Found, break immediately */ 763 break; 764 } 765 } while (icmp_echo_data_find(&icmp_globals.echo_data, index) != NULL); 766 767 echo_data->identifier = index; 768 echo_data->sequence_number = 0; 769 770 return icmp_echo_data_add(&icmp_globals.echo_data, index, echo_data); 771 } 772 773 /** Processes the client messages. 774 * 775 * Remembers the assigned identifier and sequence numbers. 776 * Runs until the client module disconnects. 777 * 778 * @param[in] callid The message identifier. 779 * @param[in] call The message parameters. 780 * @return EOK. 781 * 782 * @see icmp_interface.h 783 * @see icmp_api.h 784 */ 785 static int icmp_process_client_messages(ipc_callid_t callid, ipc_call_t call) 786 { 646 787 bool keep_on_going = true; 647 // fibril_rwlock_t lock;648 788 ipc_call_t answer; 649 789 int answer_count; 650 790 size_t length; 651 struct sockaddr * 791 struct sockaddr *addr; 652 792 ipc_callid_t data_callid; 653 icmp_echo_ refecho_data;654 int r es;793 icmp_echo_t *echo_data; 794 int rc = EOK; 655 795 656 796 /* … … 658 798 * - Answer the first NET_ICMP_INIT call. 659 799 */ 660 res = EOK;661 800 answer_count = 0; 662 801 663 // fibril_rwlock_initialize(&lock); 664 665 echo_data = (icmp_echo_ref) malloc(sizeof(*echo_data)); 666 if(! echo_data){ 802 echo_data = (icmp_echo_t *) malloc(sizeof(*echo_data)); 803 if (!echo_data) 667 804 return ENOMEM; 668 } 669 670 // assign a new identifier 805 806 /* Assign a new identifier */ 671 807 fibril_rwlock_write_lock(&icmp_globals.lock); 672 r es= icmp_bind_free_id(echo_data);808 rc = icmp_bind_free_id(echo_data); 673 809 fibril_rwlock_write_unlock(&icmp_globals.lock); 674 if (res < 0){810 if (rc < 0) { 675 811 free(echo_data); 676 return res; 677 } 678 679 while(keep_on_going){ 680 681 // answer the call 682 answer_call(callid, res, &answer, answer_count); 683 684 // refresh data 812 return rc; 813 } 814 815 while (keep_on_going) { 816 /* Answer the call */ 817 answer_call(callid, rc, &answer, answer_count); 818 819 /* Refresh data */ 685 820 refresh_answer(&answer, &answer_count); 686 821 687 / / get the next call822 /* Get the next call */ 688 823 callid = async_get_call(&call); 689 824 690 // process the call 691 switch(IPC_GET_METHOD(call)){ 692 case IPC_M_PHONE_HUNGUP: 693 keep_on_going = false; 694 res = EHANGUP; 825 /* Process the call */ 826 switch (IPC_GET_METHOD(call)) { 827 case IPC_M_PHONE_HUNGUP: 828 keep_on_going = false; 829 rc = EHANGUP; 830 break; 831 832 case NET_ICMP_ECHO: 833 if (!async_data_write_receive(&data_callid, &length)) { 834 rc = EINVAL; 695 835 break; 696 case NET_ICMP_ECHO: 697 // fibril_rwlock_write_lock(&lock); 698 if(! async_data_write_receive(&data_callid, &length)){ 699 res = EINVAL; 700 }else{ 701 addr = malloc(length); 702 if(! addr){ 703 res = ENOMEM; 704 }else{ 705 if(! ERROR_OCCURRED(async_data_write_finalize(data_callid, addr, length))){ 706 fibril_rwlock_write_lock(&icmp_globals.lock); 707 res = icmp_echo(echo_data->identifier, echo_data->sequence_number, ICMP_GET_SIZE(call), ICMP_GET_TIMEOUT(call), ICMP_GET_TTL(call), ICMP_GET_TOS(call), ICMP_GET_DONT_FRAGMENT(call), addr, (socklen_t) length); 708 fibril_rwlock_write_unlock(&icmp_globals.lock); 709 free(addr); 710 if(echo_data->sequence_number < UINT16_MAX){ 711 ++ echo_data->sequence_number; 712 }else{ 713 echo_data->sequence_number = 0; 714 } 715 }else{ 716 res = ERROR_CODE; 717 } 718 } 719 } 720 // fibril_rwlock_write_unlock(&lock); 836 } 837 838 addr = malloc(length); 839 if (!addr) { 840 rc = ENOMEM; 721 841 break; 722 default: 723 res = icmp_process_message(&call); 842 } 843 844 rc = async_data_write_finalize(data_callid, addr, 845 length); 846 if (rc != EOK) { 847 free(addr); 848 break; 849 } 850 851 fibril_rwlock_write_lock(&icmp_globals.lock); 852 rc = icmp_echo(echo_data->identifier, 853 echo_data->sequence_number, ICMP_GET_SIZE(call), 854 ICMP_GET_TIMEOUT(call), ICMP_GET_TTL(call), 855 ICMP_GET_TOS(call), ICMP_GET_DONT_FRAGMENT(call), 856 addr, (socklen_t) length); 857 fibril_rwlock_write_unlock(&icmp_globals.lock); 858 859 free(addr); 860 861 if (echo_data->sequence_number < UINT16_MAX) 862 echo_data->sequence_number++; 863 else 864 echo_data->sequence_number = 0; 865 866 break; 867 868 default: 869 rc = icmp_process_message(&call); 724 870 } 725 } 726 727 // release the identifier 871 872 } 873 874 /* Release the identifier */ 728 875 fibril_rwlock_write_lock(&icmp_globals.lock); 729 876 icmp_echo_data_exclude(&icmp_globals.echo_data, echo_data->identifier); 730 877 fibril_rwlock_write_unlock(&icmp_globals.lock); 731 return res; 732 } 733 734 int icmp_process_message(ipc_call_t * call){ 735 ERROR_DECLARE; 736 737 packet_t packet; 738 739 switch(IPC_GET_METHOD(*call)){ 740 case NET_ICMP_DEST_UNREACH: 741 if(! ERROR_OCCURRED(packet_translate_remote(icmp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){ 742 ERROR_CODE = icmp_destination_unreachable_msg(0, ICMP_GET_CODE(call), ICMP_GET_MTU(call), packet); 743 } 744 return ERROR_CODE; 745 case NET_ICMP_SOURCE_QUENCH: 746 if(! ERROR_OCCURRED(packet_translate_remote(icmp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){ 747 ERROR_CODE = icmp_source_quench_msg(0, packet); 748 } 749 return ERROR_CODE; 750 case NET_ICMP_TIME_EXCEEDED: 751 if(! ERROR_OCCURRED(packet_translate_remote(icmp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){ 752 ERROR_CODE = icmp_time_exceeded_msg(0, ICMP_GET_CODE(call), packet); 753 } 754 return ERROR_CODE; 755 case NET_ICMP_PARAMETERPROB: 756 if(! ERROR_OCCURRED(packet_translate_remote(icmp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){ 757 ERROR_CODE = icmp_parameter_problem_msg(0, ICMP_GET_CODE(call), ICMP_GET_POINTER(call), packet); 758 } 759 return ERROR_CODE; 760 default: 761 return ENOTSUP; 762 } 763 } 764 765 int icmp_release_and_return(packet_t packet, int result){ 766 pq_release_remote(icmp_globals.net_phone, packet_get_id(packet)); 767 return result; 768 } 769 770 int icmp_bind_free_id(icmp_echo_ref echo_data){ 771 icmp_param_t index; 772 773 if(! echo_data){ 774 return EBADMEM; 775 } 776 // from the last used one 777 index = icmp_globals.last_used_id; 778 do{ 779 ++ index; 780 // til the range end 781 if(index >= ICMP_FREE_IDS_END){ 782 // start from the range beginning 783 index = ICMP_FREE_IDS_START - 1; 784 do{ 785 ++ index; 786 // til the last used one 787 if(index >= icmp_globals.last_used_id){ 788 // none found 789 return ENOTCONN; 790 } 791 }while(icmp_echo_data_find(&icmp_globals.echo_data, index) != NULL); 792 // found, break immediately 793 break; 794 } 795 }while(icmp_echo_data_find(&icmp_globals.echo_data, index) != NULL); 796 echo_data->identifier = index; 797 echo_data->sequence_number = 0; 798 return icmp_echo_data_add(&icmp_globals.echo_data, index, echo_data); 799 } 878 879 return rc; 880 } 881 882 /** Processes the ICMP message. 883 * 884 * @param[in] callid The message identifier. 885 * @param[in] call The message parameters. 886 * @param[out] answer The message answer parameters. 887 * @param[out] answer_count The last parameter for the actual answer in the 888 * answer parameter. 889 * @return EOK on success. 890 * @return ENOTSUP if the message is not known. 891 * 892 * @see icmp_interface.h 893 * @see IS_NET_ICMP_MESSAGE() 894 */ 895 int icmp_message_standalone(ipc_callid_t callid, ipc_call_t *call, 896 ipc_call_t *answer, int *answer_count) 897 { 898 packet_t *packet; 899 int rc; 900 901 *answer_count = 0; 902 switch (IPC_GET_METHOD(*call)) { 903 case NET_TL_RECEIVED: 904 rc = packet_translate_remote(icmp_globals.net_phone, &packet, 905 IPC_GET_PACKET(call)); 906 if (rc != EOK) 907 return rc; 908 return icmp_received_msg_local(IPC_GET_DEVICE(call), packet, 909 SERVICE_ICMP, IPC_GET_ERROR(call)); 910 911 case NET_ICMP_INIT: 912 return icmp_process_client_messages(callid, * call); 913 914 default: 915 return icmp_process_message(call); 916 } 917 918 return ENOTSUP; 919 } 920 800 921 801 922 /** Default thread for new connections. 802 923 * 803 * 804 * 805 * 806 */ 807 static void tl_client_connection(ipc_callid_t iid, ipc_call_t * 924 * @param[in] iid The initial message identifier. 925 * @param[in] icall The initial message call structure. 926 * 927 */ 928 static void tl_client_connection(ipc_callid_t iid, ipc_call_t *icall) 808 929 { 809 930 /* … … 813 934 ipc_answer_0(iid, EOK); 814 935 815 while (true) {936 while (true) { 816 937 ipc_call_t answer; 817 938 int answer_count; … … 828 949 &answer_count); 829 950 830 /* End if said to either by the message or the processing result */ 831 if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || (res == EHANGUP)) 951 /* 952 * End if told to either by the message or the processing 953 * result. 954 */ 955 if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || 956 (res == EHANGUP)) 832 957 return; 833 958 … … 839 964 /** Starts the module. 840 965 * 841 * @param argc The count of the command line arguments. Ignored parameter. 842 * @param argv The command line parameters. Ignored parameter. 843 * 844 * @returns EOK on success. 845 * @returns Other error codes as defined for each specific module start function. 846 * 966 * @return EOK on success. 967 * @return Other error codes as defined for each specific module 968 * start function. 847 969 */ 848 970 int main(int argc, char *argv[]) 849 971 { 850 ERROR_DECLARE;972 int rc; 851 973 852 974 /* Start the module */ 853 if (ERROR_OCCURRED(tl_module_start_standalone(tl_client_connection))) 854 return ERROR_CODE; 855 856 return EOK; 975 rc = tl_module_start_standalone(tl_client_connection); 976 return rc; 857 977 } 858 978 859 979 /** @} 860 980 */ 981
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