[337] | 1 | /***************************************************************************
|
---|
| 2 | * _ _ ____ _
|
---|
| 3 | * Project ___| | | | _ \| |
|
---|
| 4 | * / __| | | | |_) | |
|
---|
| 5 | * | (__| |_| | _ <| |___
|
---|
| 6 | * \___|\___/|_| \_\_____|
|
---|
| 7 | *
|
---|
| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
|
---|
| 9 | *
|
---|
| 10 | * This software is licensed as described in the file COPYING, which
|
---|
| 11 | * you should have received as part of this distribution. The terms
|
---|
| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
|
---|
| 13 | *
|
---|
| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
---|
| 15 | * copies of the Software, and permit persons to whom the Software is
|
---|
| 16 | * furnished to do so, under the terms of the COPYING file.
|
---|
| 17 | *
|
---|
| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
---|
| 19 | * KIND, either express or implied.
|
---|
| 20 | *
|
---|
| 21 | ***************************************************************************/
|
---|
| 22 |
|
---|
| 23 | #include "curl_setup.h"
|
---|
| 24 |
|
---|
| 25 | #ifndef CURL_DISABLE_TFTP
|
---|
| 26 |
|
---|
| 27 | #ifdef HAVE_NETINET_IN_H
|
---|
| 28 | #include <netinet/in.h>
|
---|
| 29 | #endif
|
---|
| 30 | #ifdef HAVE_NETDB_H
|
---|
| 31 | #include <netdb.h>
|
---|
| 32 | #endif
|
---|
| 33 | #ifdef HAVE_ARPA_INET_H
|
---|
| 34 | #include <arpa/inet.h>
|
---|
| 35 | #endif
|
---|
| 36 | #ifdef HAVE_NET_IF_H
|
---|
| 37 | #include <net/if.h>
|
---|
| 38 | #endif
|
---|
| 39 | #ifdef HAVE_SYS_IOCTL_H
|
---|
| 40 | #include <sys/ioctl.h>
|
---|
| 41 | #endif
|
---|
| 42 |
|
---|
| 43 | #ifdef HAVE_SYS_PARAM_H
|
---|
| 44 | #include <sys/param.h>
|
---|
| 45 | #endif
|
---|
| 46 |
|
---|
| 47 | #include "urldata.h"
|
---|
| 48 | #include <curl/curl.h>
|
---|
| 49 | #include "transfer.h"
|
---|
| 50 | #include "sendf.h"
|
---|
| 51 | #include "tftp.h"
|
---|
| 52 | #include "progress.h"
|
---|
| 53 | #include "connect.h"
|
---|
| 54 | #include "strerror.h"
|
---|
| 55 | #include "sockaddr.h" /* required for Curl_sockaddr_storage */
|
---|
| 56 | #include "multiif.h"
|
---|
| 57 | #include "url.h"
|
---|
| 58 | #include "strcase.h"
|
---|
| 59 | #include "speedcheck.h"
|
---|
| 60 | #include "select.h"
|
---|
| 61 | #include "escape.h"
|
---|
| 62 |
|
---|
| 63 | /* The last 3 #include files should be in this order */
|
---|
| 64 | #include "curl_printf.h"
|
---|
| 65 | #include "curl_memory.h"
|
---|
| 66 | #include "memdebug.h"
|
---|
| 67 |
|
---|
| 68 | /* RFC2348 allows the block size to be negotiated */
|
---|
| 69 | #define TFTP_BLKSIZE_DEFAULT 512
|
---|
| 70 | #define TFTP_BLKSIZE_MIN 8
|
---|
| 71 | #define TFTP_BLKSIZE_MAX 65464
|
---|
| 72 | #define TFTP_OPTION_BLKSIZE "blksize"
|
---|
| 73 |
|
---|
| 74 | /* from RFC2349: */
|
---|
| 75 | #define TFTP_OPTION_TSIZE "tsize"
|
---|
| 76 | #define TFTP_OPTION_INTERVAL "timeout"
|
---|
| 77 |
|
---|
| 78 | typedef enum {
|
---|
| 79 | TFTP_MODE_NETASCII = 0,
|
---|
| 80 | TFTP_MODE_OCTET
|
---|
| 81 | } tftp_mode_t;
|
---|
| 82 |
|
---|
| 83 | typedef enum {
|
---|
| 84 | TFTP_STATE_START = 0,
|
---|
| 85 | TFTP_STATE_RX,
|
---|
| 86 | TFTP_STATE_TX,
|
---|
| 87 | TFTP_STATE_FIN
|
---|
| 88 | } tftp_state_t;
|
---|
| 89 |
|
---|
| 90 | typedef enum {
|
---|
| 91 | TFTP_EVENT_NONE = -1,
|
---|
| 92 | TFTP_EVENT_INIT = 0,
|
---|
| 93 | TFTP_EVENT_RRQ = 1,
|
---|
| 94 | TFTP_EVENT_WRQ = 2,
|
---|
| 95 | TFTP_EVENT_DATA = 3,
|
---|
| 96 | TFTP_EVENT_ACK = 4,
|
---|
| 97 | TFTP_EVENT_ERROR = 5,
|
---|
| 98 | TFTP_EVENT_OACK = 6,
|
---|
| 99 | TFTP_EVENT_TIMEOUT
|
---|
| 100 | } tftp_event_t;
|
---|
| 101 |
|
---|
| 102 | typedef enum {
|
---|
| 103 | TFTP_ERR_UNDEF = 0,
|
---|
| 104 | TFTP_ERR_NOTFOUND,
|
---|
| 105 | TFTP_ERR_PERM,
|
---|
| 106 | TFTP_ERR_DISKFULL,
|
---|
| 107 | TFTP_ERR_ILLEGAL,
|
---|
| 108 | TFTP_ERR_UNKNOWNID,
|
---|
| 109 | TFTP_ERR_EXISTS,
|
---|
| 110 | TFTP_ERR_NOSUCHUSER, /* This will never be triggered by this code */
|
---|
| 111 |
|
---|
| 112 | /* The remaining error codes are internal to curl */
|
---|
| 113 | TFTP_ERR_NONE = -100,
|
---|
| 114 | TFTP_ERR_TIMEOUT,
|
---|
| 115 | TFTP_ERR_NORESPONSE
|
---|
| 116 | } tftp_error_t;
|
---|
| 117 |
|
---|
| 118 | typedef struct tftp_packet {
|
---|
| 119 | unsigned char *data;
|
---|
| 120 | } tftp_packet_t;
|
---|
| 121 |
|
---|
| 122 | typedef struct tftp_state_data {
|
---|
| 123 | tftp_state_t state;
|
---|
| 124 | tftp_mode_t mode;
|
---|
| 125 | tftp_error_t error;
|
---|
| 126 | tftp_event_t event;
|
---|
| 127 | struct connectdata *conn;
|
---|
| 128 | curl_socket_t sockfd;
|
---|
| 129 | int retries;
|
---|
| 130 | int retry_time;
|
---|
| 131 | int retry_max;
|
---|
| 132 | time_t start_time;
|
---|
| 133 | time_t max_time;
|
---|
| 134 | time_t rx_time;
|
---|
| 135 | unsigned short block;
|
---|
| 136 | struct Curl_sockaddr_storage local_addr;
|
---|
| 137 | struct Curl_sockaddr_storage remote_addr;
|
---|
| 138 | curl_socklen_t remote_addrlen;
|
---|
| 139 | int rbytes;
|
---|
| 140 | int sbytes;
|
---|
| 141 | int blksize;
|
---|
| 142 | int requested_blksize;
|
---|
| 143 | tftp_packet_t rpacket;
|
---|
| 144 | tftp_packet_t spacket;
|
---|
| 145 | } tftp_state_data_t;
|
---|
| 146 |
|
---|
| 147 |
|
---|
| 148 | /* Forward declarations */
|
---|
| 149 | static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event);
|
---|
| 150 | static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event);
|
---|
| 151 | static CURLcode tftp_connect(struct connectdata *conn, bool *done);
|
---|
| 152 | static CURLcode tftp_disconnect(struct connectdata *conn,
|
---|
| 153 | bool dead_connection);
|
---|
| 154 | static CURLcode tftp_do(struct connectdata *conn, bool *done);
|
---|
| 155 | static CURLcode tftp_done(struct connectdata *conn,
|
---|
| 156 | CURLcode, bool premature);
|
---|
| 157 | static CURLcode tftp_setup_connection(struct connectdata * conn);
|
---|
| 158 | static CURLcode tftp_multi_statemach(struct connectdata *conn, bool *done);
|
---|
| 159 | static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done);
|
---|
| 160 | static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
| 161 | int numsocks);
|
---|
| 162 | static CURLcode tftp_translate_code(tftp_error_t error);
|
---|
| 163 |
|
---|
| 164 |
|
---|
| 165 | /*
|
---|
| 166 | * TFTP protocol handler.
|
---|
| 167 | */
|
---|
| 168 |
|
---|
| 169 | const struct Curl_handler Curl_handler_tftp = {
|
---|
| 170 | "TFTP", /* scheme */
|
---|
| 171 | tftp_setup_connection, /* setup_connection */
|
---|
| 172 | tftp_do, /* do_it */
|
---|
| 173 | tftp_done, /* done */
|
---|
| 174 | ZERO_NULL, /* do_more */
|
---|
| 175 | tftp_connect, /* connect_it */
|
---|
| 176 | tftp_multi_statemach, /* connecting */
|
---|
| 177 | tftp_doing, /* doing */
|
---|
| 178 | tftp_getsock, /* proto_getsock */
|
---|
| 179 | tftp_getsock, /* doing_getsock */
|
---|
| 180 | ZERO_NULL, /* domore_getsock */
|
---|
| 181 | ZERO_NULL, /* perform_getsock */
|
---|
| 182 | tftp_disconnect, /* disconnect */
|
---|
| 183 | ZERO_NULL, /* readwrite */
|
---|
| 184 | ZERO_NULL, /* connection_check */
|
---|
| 185 | PORT_TFTP, /* defport */
|
---|
| 186 | CURLPROTO_TFTP, /* protocol */
|
---|
| 187 | PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
|
---|
| 188 | };
|
---|
| 189 |
|
---|
| 190 | /**********************************************************
|
---|
| 191 | *
|
---|
| 192 | * tftp_set_timeouts -
|
---|
| 193 | *
|
---|
| 194 | * Set timeouts based on state machine state.
|
---|
| 195 | * Use user provided connect timeouts until DATA or ACK
|
---|
| 196 | * packet is received, then use user-provided transfer timeouts
|
---|
| 197 | *
|
---|
| 198 | *
|
---|
| 199 | **********************************************************/
|
---|
| 200 | static CURLcode tftp_set_timeouts(tftp_state_data_t *state)
|
---|
| 201 | {
|
---|
| 202 | time_t maxtime, timeout;
|
---|
| 203 | timediff_t timeout_ms;
|
---|
| 204 | bool start = (state->state == TFTP_STATE_START) ? TRUE : FALSE;
|
---|
| 205 |
|
---|
| 206 | time(&state->start_time);
|
---|
| 207 |
|
---|
| 208 | /* Compute drop-dead time */
|
---|
| 209 | timeout_ms = Curl_timeleft(state->conn->data, NULL, start);
|
---|
| 210 |
|
---|
| 211 | if(timeout_ms < 0) {
|
---|
| 212 | /* time-out, bail out, go home */
|
---|
| 213 | failf(state->conn->data, "Connection time-out");
|
---|
| 214 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 215 | }
|
---|
| 216 |
|
---|
| 217 | if(start) {
|
---|
| 218 |
|
---|
| 219 | maxtime = (time_t)(timeout_ms + 500) / 1000;
|
---|
| 220 | state->max_time = state->start_time + maxtime;
|
---|
| 221 |
|
---|
| 222 | /* Set per-block timeout to total */
|
---|
| 223 | timeout = maxtime;
|
---|
| 224 |
|
---|
| 225 | /* Average restart after 5 seconds */
|
---|
| 226 | state->retry_max = (int)timeout/5;
|
---|
| 227 |
|
---|
| 228 | if(state->retry_max < 1)
|
---|
| 229 | /* avoid division by zero below */
|
---|
| 230 | state->retry_max = 1;
|
---|
| 231 |
|
---|
| 232 | /* Compute the re-start interval to suit the timeout */
|
---|
| 233 | state->retry_time = (int)timeout/state->retry_max;
|
---|
| 234 | if(state->retry_time<1)
|
---|
| 235 | state->retry_time = 1;
|
---|
| 236 |
|
---|
| 237 | }
|
---|
| 238 | else {
|
---|
| 239 | if(timeout_ms > 0)
|
---|
| 240 | maxtime = (time_t)(timeout_ms + 500) / 1000;
|
---|
| 241 | else
|
---|
| 242 | maxtime = 3600;
|
---|
| 243 |
|
---|
| 244 | state->max_time = state->start_time + maxtime;
|
---|
| 245 |
|
---|
| 246 | /* Set per-block timeout to total */
|
---|
| 247 | timeout = maxtime;
|
---|
| 248 |
|
---|
| 249 | /* Average reposting an ACK after 5 seconds */
|
---|
| 250 | state->retry_max = (int)timeout/5;
|
---|
| 251 | }
|
---|
| 252 | /* But bound the total number */
|
---|
| 253 | if(state->retry_max<3)
|
---|
| 254 | state->retry_max = 3;
|
---|
| 255 |
|
---|
| 256 | if(state->retry_max>50)
|
---|
| 257 | state->retry_max = 50;
|
---|
| 258 |
|
---|
| 259 | /* Compute the re-ACK interval to suit the timeout */
|
---|
| 260 | state->retry_time = (int)(timeout/state->retry_max);
|
---|
| 261 | if(state->retry_time<1)
|
---|
| 262 | state->retry_time = 1;
|
---|
| 263 |
|
---|
| 264 | infof(state->conn->data,
|
---|
| 265 | "set timeouts for state %d; Total %ld, retry %d maxtry %d\n",
|
---|
| 266 | (int)state->state, (long)(state->max_time-state->start_time),
|
---|
| 267 | state->retry_time, state->retry_max);
|
---|
| 268 |
|
---|
| 269 | /* init RX time */
|
---|
| 270 | time(&state->rx_time);
|
---|
| 271 |
|
---|
| 272 | return CURLE_OK;
|
---|
| 273 | }
|
---|
| 274 |
|
---|
| 275 | /**********************************************************
|
---|
| 276 | *
|
---|
| 277 | * tftp_set_send_first
|
---|
| 278 | *
|
---|
| 279 | * Event handler for the START state
|
---|
| 280 | *
|
---|
| 281 | **********************************************************/
|
---|
| 282 |
|
---|
| 283 | static void setpacketevent(tftp_packet_t *packet, unsigned short num)
|
---|
| 284 | {
|
---|
| 285 | packet->data[0] = (unsigned char)(num >> 8);
|
---|
| 286 | packet->data[1] = (unsigned char)(num & 0xff);
|
---|
| 287 | }
|
---|
| 288 |
|
---|
| 289 |
|
---|
| 290 | static void setpacketblock(tftp_packet_t *packet, unsigned short num)
|
---|
| 291 | {
|
---|
| 292 | packet->data[2] = (unsigned char)(num >> 8);
|
---|
| 293 | packet->data[3] = (unsigned char)(num & 0xff);
|
---|
| 294 | }
|
---|
| 295 |
|
---|
| 296 | static unsigned short getrpacketevent(const tftp_packet_t *packet)
|
---|
| 297 | {
|
---|
| 298 | return (unsigned short)((packet->data[0] << 8) | packet->data[1]);
|
---|
| 299 | }
|
---|
| 300 |
|
---|
| 301 | static unsigned short getrpacketblock(const tftp_packet_t *packet)
|
---|
| 302 | {
|
---|
| 303 | return (unsigned short)((packet->data[2] << 8) | packet->data[3]);
|
---|
| 304 | }
|
---|
| 305 |
|
---|
| 306 | static size_t Curl_strnlen(const char *string, size_t maxlen)
|
---|
| 307 | {
|
---|
| 308 | const char *end = memchr(string, '\0', maxlen);
|
---|
| 309 | return end ? (size_t) (end - string) : maxlen;
|
---|
| 310 | }
|
---|
| 311 |
|
---|
| 312 | static const char *tftp_option_get(const char *buf, size_t len,
|
---|
| 313 | const char **option, const char **value)
|
---|
| 314 | {
|
---|
| 315 | size_t loc;
|
---|
| 316 |
|
---|
| 317 | loc = Curl_strnlen(buf, len);
|
---|
| 318 | loc++; /* NULL term */
|
---|
| 319 |
|
---|
| 320 | if(loc >= len)
|
---|
| 321 | return NULL;
|
---|
| 322 | *option = buf;
|
---|
| 323 |
|
---|
| 324 | loc += Curl_strnlen(buf + loc, len-loc);
|
---|
| 325 | loc++; /* NULL term */
|
---|
| 326 |
|
---|
| 327 | if(loc > len)
|
---|
| 328 | return NULL;
|
---|
| 329 | *value = &buf[strlen(*option) + 1];
|
---|
| 330 |
|
---|
| 331 | return &buf[loc];
|
---|
| 332 | }
|
---|
| 333 |
|
---|
| 334 | static CURLcode tftp_parse_option_ack(tftp_state_data_t *state,
|
---|
| 335 | const char *ptr, int len)
|
---|
| 336 | {
|
---|
| 337 | const char *tmp = ptr;
|
---|
| 338 | struct Curl_easy *data = state->conn->data;
|
---|
| 339 |
|
---|
| 340 | /* if OACK doesn't contain blksize option, the default (512) must be used */
|
---|
| 341 | state->blksize = TFTP_BLKSIZE_DEFAULT;
|
---|
| 342 |
|
---|
| 343 | while(tmp < ptr + len) {
|
---|
| 344 | const char *option, *value;
|
---|
| 345 |
|
---|
| 346 | tmp = tftp_option_get(tmp, ptr + len - tmp, &option, &value);
|
---|
| 347 | if(tmp == NULL) {
|
---|
| 348 | failf(data, "Malformed ACK packet, rejecting");
|
---|
| 349 | return CURLE_TFTP_ILLEGAL;
|
---|
| 350 | }
|
---|
| 351 |
|
---|
| 352 | infof(data, "got option=(%s) value=(%s)\n", option, value);
|
---|
| 353 |
|
---|
| 354 | if(checkprefix(option, TFTP_OPTION_BLKSIZE)) {
|
---|
| 355 | long blksize;
|
---|
| 356 |
|
---|
| 357 | blksize = strtol(value, NULL, 10);
|
---|
| 358 |
|
---|
| 359 | if(!blksize) {
|
---|
| 360 | failf(data, "invalid blocksize value in OACK packet");
|
---|
| 361 | return CURLE_TFTP_ILLEGAL;
|
---|
| 362 | }
|
---|
| 363 | if(blksize > TFTP_BLKSIZE_MAX) {
|
---|
| 364 | failf(data, "%s (%d)", "blksize is larger than max supported",
|
---|
| 365 | TFTP_BLKSIZE_MAX);
|
---|
| 366 | return CURLE_TFTP_ILLEGAL;
|
---|
| 367 | }
|
---|
| 368 | else if(blksize < TFTP_BLKSIZE_MIN) {
|
---|
| 369 | failf(data, "%s (%d)", "blksize is smaller than min supported",
|
---|
| 370 | TFTP_BLKSIZE_MIN);
|
---|
| 371 | return CURLE_TFTP_ILLEGAL;
|
---|
| 372 | }
|
---|
| 373 | else if(blksize > state->requested_blksize) {
|
---|
| 374 | /* could realloc pkt buffers here, but the spec doesn't call out
|
---|
| 375 | * support for the server requesting a bigger blksize than the client
|
---|
| 376 | * requests */
|
---|
| 377 | failf(data, "%s (%ld)",
|
---|
| 378 | "server requested blksize larger than allocated", blksize);
|
---|
| 379 | return CURLE_TFTP_ILLEGAL;
|
---|
| 380 | }
|
---|
| 381 |
|
---|
| 382 | state->blksize = (int)blksize;
|
---|
| 383 | infof(data, "%s (%d) %s (%d)\n", "blksize parsed from OACK",
|
---|
| 384 | state->blksize, "requested", state->requested_blksize);
|
---|
| 385 | }
|
---|
| 386 | else if(checkprefix(option, TFTP_OPTION_TSIZE)) {
|
---|
| 387 | long tsize = 0;
|
---|
| 388 |
|
---|
| 389 | tsize = strtol(value, NULL, 10);
|
---|
| 390 | infof(data, "%s (%ld)\n", "tsize parsed from OACK", tsize);
|
---|
| 391 |
|
---|
| 392 | /* tsize should be ignored on upload: Who cares about the size of the
|
---|
| 393 | remote file? */
|
---|
| 394 | if(!data->set.upload) {
|
---|
| 395 | if(!tsize) {
|
---|
| 396 | failf(data, "invalid tsize -:%s:- value in OACK packet", value);
|
---|
| 397 | return CURLE_TFTP_ILLEGAL;
|
---|
| 398 | }
|
---|
| 399 | Curl_pgrsSetDownloadSize(data, tsize);
|
---|
| 400 | }
|
---|
| 401 | }
|
---|
| 402 | }
|
---|
| 403 |
|
---|
| 404 | return CURLE_OK;
|
---|
| 405 | }
|
---|
| 406 |
|
---|
| 407 | static size_t tftp_option_add(tftp_state_data_t *state, size_t csize,
|
---|
| 408 | char *buf, const char *option)
|
---|
| 409 | {
|
---|
| 410 | if(( strlen(option) + csize + 1) > (size_t)state->blksize)
|
---|
| 411 | return 0;
|
---|
| 412 | strcpy(buf, option);
|
---|
| 413 | return strlen(option) + 1;
|
---|
| 414 | }
|
---|
| 415 |
|
---|
| 416 | static CURLcode tftp_connect_for_tx(tftp_state_data_t *state,
|
---|
| 417 | tftp_event_t event)
|
---|
| 418 | {
|
---|
| 419 | CURLcode result;
|
---|
| 420 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
| 421 | struct Curl_easy *data = state->conn->data;
|
---|
| 422 |
|
---|
| 423 | infof(data, "%s\n", "Connected for transmit");
|
---|
| 424 | #endif
|
---|
| 425 | state->state = TFTP_STATE_TX;
|
---|
| 426 | result = tftp_set_timeouts(state);
|
---|
| 427 | if(result)
|
---|
| 428 | return result;
|
---|
| 429 | return tftp_tx(state, event);
|
---|
| 430 | }
|
---|
| 431 |
|
---|
| 432 | static CURLcode tftp_connect_for_rx(tftp_state_data_t *state,
|
---|
| 433 | tftp_event_t event)
|
---|
| 434 | {
|
---|
| 435 | CURLcode result;
|
---|
| 436 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
| 437 | struct Curl_easy *data = state->conn->data;
|
---|
| 438 |
|
---|
| 439 | infof(data, "%s\n", "Connected for receive");
|
---|
| 440 | #endif
|
---|
| 441 | state->state = TFTP_STATE_RX;
|
---|
| 442 | result = tftp_set_timeouts(state);
|
---|
| 443 | if(result)
|
---|
| 444 | return result;
|
---|
| 445 | return tftp_rx(state, event);
|
---|
| 446 | }
|
---|
| 447 |
|
---|
| 448 | static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
|
---|
| 449 | {
|
---|
| 450 | size_t sbytes;
|
---|
| 451 | ssize_t senddata;
|
---|
| 452 | const char *mode = "octet";
|
---|
| 453 | char *filename;
|
---|
| 454 | char buf[64];
|
---|
| 455 | struct Curl_easy *data = state->conn->data;
|
---|
| 456 | CURLcode result = CURLE_OK;
|
---|
| 457 |
|
---|
| 458 | /* Set ascii mode if -B flag was used */
|
---|
| 459 | if(data->set.prefer_ascii)
|
---|
| 460 | mode = "netascii";
|
---|
| 461 |
|
---|
| 462 | switch(event) {
|
---|
| 463 |
|
---|
| 464 | case TFTP_EVENT_INIT: /* Send the first packet out */
|
---|
| 465 | case TFTP_EVENT_TIMEOUT: /* Resend the first packet out */
|
---|
| 466 | /* Increment the retry counter, quit if over the limit */
|
---|
| 467 | state->retries++;
|
---|
| 468 | if(state->retries>state->retry_max) {
|
---|
| 469 | state->error = TFTP_ERR_NORESPONSE;
|
---|
| 470 | state->state = TFTP_STATE_FIN;
|
---|
| 471 | return result;
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | if(data->set.upload) {
|
---|
| 475 | /* If we are uploading, send an WRQ */
|
---|
| 476 | setpacketevent(&state->spacket, TFTP_EVENT_WRQ);
|
---|
| 477 | state->conn->data->req.upload_fromhere =
|
---|
| 478 | (char *)state->spacket.data + 4;
|
---|
| 479 | if(data->state.infilesize != -1)
|
---|
| 480 | Curl_pgrsSetUploadSize(data, data->state.infilesize);
|
---|
| 481 | }
|
---|
| 482 | else {
|
---|
| 483 | /* If we are downloading, send an RRQ */
|
---|
| 484 | setpacketevent(&state->spacket, TFTP_EVENT_RRQ);
|
---|
| 485 | }
|
---|
| 486 | /* As RFC3617 describes the separator slash is not actually part of the
|
---|
| 487 | file name so we skip the always-present first letter of the path
|
---|
| 488 | string. */
|
---|
| 489 | result = Curl_urldecode(data, &state->conn->data->state.path[1], 0,
|
---|
| 490 | &filename, NULL, FALSE);
|
---|
| 491 | if(result)
|
---|
| 492 | return result;
|
---|
| 493 |
|
---|
| 494 | if(strlen(filename) > (state->blksize - strlen(mode) - 4)) {
|
---|
| 495 | failf(data, "TFTP file name too long\n");
|
---|
| 496 | free(filename);
|
---|
| 497 | return CURLE_TFTP_ILLEGAL; /* too long file name field */
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | snprintf((char *)state->spacket.data + 2,
|
---|
| 501 | state->blksize,
|
---|
| 502 | "%s%c%s%c", filename, '\0', mode, '\0');
|
---|
| 503 | sbytes = 4 + strlen(filename) + strlen(mode);
|
---|
| 504 |
|
---|
| 505 | /* optional addition of TFTP options */
|
---|
| 506 | if(!data->set.tftp_no_options) {
|
---|
| 507 | /* add tsize option */
|
---|
| 508 | if(data->set.upload && (data->state.infilesize != -1))
|
---|
| 509 | snprintf(buf, sizeof(buf), "%" CURL_FORMAT_CURL_OFF_T,
|
---|
| 510 | data->state.infilesize);
|
---|
| 511 | else
|
---|
| 512 | strcpy(buf, "0"); /* the destination is large enough */
|
---|
| 513 |
|
---|
| 514 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 515 | (char *)state->spacket.data + sbytes,
|
---|
| 516 | TFTP_OPTION_TSIZE);
|
---|
| 517 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 518 | (char *)state->spacket.data + sbytes, buf);
|
---|
| 519 | /* add blksize option */
|
---|
| 520 | snprintf(buf, sizeof(buf), "%d", state->requested_blksize);
|
---|
| 521 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 522 | (char *)state->spacket.data + sbytes,
|
---|
| 523 | TFTP_OPTION_BLKSIZE);
|
---|
| 524 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 525 | (char *)state->spacket.data + sbytes, buf);
|
---|
| 526 |
|
---|
| 527 | /* add timeout option */
|
---|
| 528 | snprintf(buf, sizeof(buf), "%d", state->retry_time);
|
---|
| 529 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 530 | (char *)state->spacket.data + sbytes,
|
---|
| 531 | TFTP_OPTION_INTERVAL);
|
---|
| 532 | sbytes += tftp_option_add(state, sbytes,
|
---|
| 533 | (char *)state->spacket.data + sbytes, buf);
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | /* the typecase for the 3rd argument is mostly for systems that do
|
---|
| 537 | not have a size_t argument, like older unixes that want an 'int' */
|
---|
| 538 | senddata = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 539 | (SEND_TYPE_ARG3)sbytes, 0,
|
---|
| 540 | state->conn->ip_addr->ai_addr,
|
---|
| 541 | state->conn->ip_addr->ai_addrlen);
|
---|
| 542 | if(senddata != (ssize_t)sbytes) {
|
---|
| 543 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 544 | }
|
---|
| 545 | free(filename);
|
---|
| 546 | break;
|
---|
| 547 |
|
---|
| 548 | case TFTP_EVENT_OACK:
|
---|
| 549 | if(data->set.upload) {
|
---|
| 550 | result = tftp_connect_for_tx(state, event);
|
---|
| 551 | }
|
---|
| 552 | else {
|
---|
| 553 | result = tftp_connect_for_rx(state, event);
|
---|
| 554 | }
|
---|
| 555 | break;
|
---|
| 556 |
|
---|
| 557 | case TFTP_EVENT_ACK: /* Connected for transmit */
|
---|
| 558 | result = tftp_connect_for_tx(state, event);
|
---|
| 559 | break;
|
---|
| 560 |
|
---|
| 561 | case TFTP_EVENT_DATA: /* Connected for receive */
|
---|
| 562 | result = tftp_connect_for_rx(state, event);
|
---|
| 563 | break;
|
---|
| 564 |
|
---|
| 565 | case TFTP_EVENT_ERROR:
|
---|
| 566 | state->state = TFTP_STATE_FIN;
|
---|
| 567 | break;
|
---|
| 568 |
|
---|
| 569 | default:
|
---|
| 570 | failf(state->conn->data, "tftp_send_first: internal error");
|
---|
| 571 | break;
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | return result;
|
---|
| 575 | }
|
---|
| 576 |
|
---|
| 577 | /* the next blocknum is x + 1 but it needs to wrap at an unsigned 16bit
|
---|
| 578 | boundary */
|
---|
| 579 | #define NEXT_BLOCKNUM(x) (((x) + 1)&0xffff)
|
---|
| 580 |
|
---|
| 581 | /**********************************************************
|
---|
| 582 | *
|
---|
| 583 | * tftp_rx
|
---|
| 584 | *
|
---|
| 585 | * Event handler for the RX state
|
---|
| 586 | *
|
---|
| 587 | **********************************************************/
|
---|
| 588 | static CURLcode tftp_rx(tftp_state_data_t *state, tftp_event_t event)
|
---|
| 589 | {
|
---|
| 590 | ssize_t sbytes;
|
---|
| 591 | int rblock;
|
---|
| 592 | struct Curl_easy *data = state->conn->data;
|
---|
| 593 |
|
---|
| 594 | switch(event) {
|
---|
| 595 |
|
---|
| 596 | case TFTP_EVENT_DATA:
|
---|
| 597 | /* Is this the block we expect? */
|
---|
| 598 | rblock = getrpacketblock(&state->rpacket);
|
---|
| 599 | if(NEXT_BLOCKNUM(state->block) == rblock) {
|
---|
| 600 | /* This is the expected block. Reset counters and ACK it. */
|
---|
| 601 | state->retries = 0;
|
---|
| 602 | }
|
---|
| 603 | else if(state->block == rblock) {
|
---|
| 604 | /* This is the last recently received block again. Log it and ACK it
|
---|
| 605 | again. */
|
---|
| 606 | infof(data, "Received last DATA packet block %d again.\n", rblock);
|
---|
| 607 | }
|
---|
| 608 | else {
|
---|
| 609 | /* totally unexpected, just log it */
|
---|
| 610 | infof(data,
|
---|
| 611 | "Received unexpected DATA packet block %d, expecting block %d\n",
|
---|
| 612 | rblock, NEXT_BLOCKNUM(state->block));
|
---|
| 613 | break;
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 | /* ACK this block. */
|
---|
| 617 | state->block = (unsigned short)rblock;
|
---|
| 618 | setpacketevent(&state->spacket, TFTP_EVENT_ACK);
|
---|
| 619 | setpacketblock(&state->spacket, state->block);
|
---|
| 620 | sbytes = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 621 | 4, SEND_4TH_ARG,
|
---|
| 622 | (struct sockaddr *)&state->remote_addr,
|
---|
| 623 | state->remote_addrlen);
|
---|
| 624 | if(sbytes < 0) {
|
---|
| 625 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 626 | return CURLE_SEND_ERROR;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | /* Check if completed (That is, a less than full packet is received) */
|
---|
| 630 | if(state->rbytes < (ssize_t)state->blksize + 4) {
|
---|
| 631 | state->state = TFTP_STATE_FIN;
|
---|
| 632 | }
|
---|
| 633 | else {
|
---|
| 634 | state->state = TFTP_STATE_RX;
|
---|
| 635 | }
|
---|
| 636 | time(&state->rx_time);
|
---|
| 637 | break;
|
---|
| 638 |
|
---|
| 639 | case TFTP_EVENT_OACK:
|
---|
| 640 | /* ACK option acknowledgement so we can move on to data */
|
---|
| 641 | state->block = 0;
|
---|
| 642 | state->retries = 0;
|
---|
| 643 | setpacketevent(&state->spacket, TFTP_EVENT_ACK);
|
---|
| 644 | setpacketblock(&state->spacket, state->block);
|
---|
| 645 | sbytes = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 646 | 4, SEND_4TH_ARG,
|
---|
| 647 | (struct sockaddr *)&state->remote_addr,
|
---|
| 648 | state->remote_addrlen);
|
---|
| 649 | if(sbytes < 0) {
|
---|
| 650 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 651 | return CURLE_SEND_ERROR;
|
---|
| 652 | }
|
---|
| 653 |
|
---|
| 654 | /* we're ready to RX data */
|
---|
| 655 | state->state = TFTP_STATE_RX;
|
---|
| 656 | time(&state->rx_time);
|
---|
| 657 | break;
|
---|
| 658 |
|
---|
| 659 | case TFTP_EVENT_TIMEOUT:
|
---|
| 660 | /* Increment the retry count and fail if over the limit */
|
---|
| 661 | state->retries++;
|
---|
| 662 | infof(data,
|
---|
| 663 | "Timeout waiting for block %d ACK. Retries = %d\n",
|
---|
| 664 | NEXT_BLOCKNUM(state->block), state->retries);
|
---|
| 665 | if(state->retries > state->retry_max) {
|
---|
| 666 | state->error = TFTP_ERR_TIMEOUT;
|
---|
| 667 | state->state = TFTP_STATE_FIN;
|
---|
| 668 | }
|
---|
| 669 | else {
|
---|
| 670 | /* Resend the previous ACK */
|
---|
| 671 | sbytes = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 672 | 4, SEND_4TH_ARG,
|
---|
| 673 | (struct sockaddr *)&state->remote_addr,
|
---|
| 674 | state->remote_addrlen);
|
---|
| 675 | if(sbytes<0) {
|
---|
| 676 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 677 | return CURLE_SEND_ERROR;
|
---|
| 678 | }
|
---|
| 679 | }
|
---|
| 680 | break;
|
---|
| 681 |
|
---|
| 682 | case TFTP_EVENT_ERROR:
|
---|
| 683 | setpacketevent(&state->spacket, TFTP_EVENT_ERROR);
|
---|
| 684 | setpacketblock(&state->spacket, state->block);
|
---|
| 685 | (void)sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 686 | 4, SEND_4TH_ARG,
|
---|
| 687 | (struct sockaddr *)&state->remote_addr,
|
---|
| 688 | state->remote_addrlen);
|
---|
| 689 | /* don't bother with the return code, but if the socket is still up we
|
---|
| 690 | * should be a good TFTP client and let the server know we're done */
|
---|
| 691 | state->state = TFTP_STATE_FIN;
|
---|
| 692 | break;
|
---|
| 693 |
|
---|
| 694 | default:
|
---|
| 695 | failf(data, "%s", "tftp_rx: internal error");
|
---|
| 696 | return CURLE_TFTP_ILLEGAL; /* not really the perfect return code for
|
---|
| 697 | this */
|
---|
| 698 | }
|
---|
| 699 | return CURLE_OK;
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | /**********************************************************
|
---|
| 703 | *
|
---|
| 704 | * tftp_tx
|
---|
| 705 | *
|
---|
| 706 | * Event handler for the TX state
|
---|
| 707 | *
|
---|
| 708 | **********************************************************/
|
---|
| 709 | static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
|
---|
| 710 | {
|
---|
| 711 | struct Curl_easy *data = state->conn->data;
|
---|
| 712 | ssize_t sbytes;
|
---|
| 713 | int rblock;
|
---|
| 714 | CURLcode result = CURLE_OK;
|
---|
| 715 | struct SingleRequest *k = &data->req;
|
---|
| 716 | int cb; /* Bytes currently read */
|
---|
| 717 |
|
---|
| 718 | switch(event) {
|
---|
| 719 |
|
---|
| 720 | case TFTP_EVENT_ACK:
|
---|
| 721 | case TFTP_EVENT_OACK:
|
---|
| 722 | if(event == TFTP_EVENT_ACK) {
|
---|
| 723 | /* Ack the packet */
|
---|
| 724 | rblock = getrpacketblock(&state->rpacket);
|
---|
| 725 |
|
---|
| 726 | if(rblock != state->block &&
|
---|
| 727 | /* There's a bug in tftpd-hpa that causes it to send us an ack for
|
---|
| 728 | * 65535 when the block number wraps to 0. So when we're expecting
|
---|
| 729 | * 0, also accept 65535. See
|
---|
| 730 | * http://syslinux.zytor.com/archives/2010-September/015253.html
|
---|
| 731 | * */
|
---|
| 732 | !(state->block == 0 && rblock == 65535)) {
|
---|
| 733 | /* This isn't the expected block. Log it and up the retry counter */
|
---|
| 734 | infof(data, "Received ACK for block %d, expecting %d\n",
|
---|
| 735 | rblock, state->block);
|
---|
| 736 | state->retries++;
|
---|
| 737 | /* Bail out if over the maximum */
|
---|
| 738 | if(state->retries>state->retry_max) {
|
---|
| 739 | failf(data, "tftp_tx: giving up waiting for block %d ack",
|
---|
| 740 | state->block);
|
---|
| 741 | result = CURLE_SEND_ERROR;
|
---|
| 742 | }
|
---|
| 743 | else {
|
---|
| 744 | /* Re-send the data packet */
|
---|
| 745 | sbytes = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 746 | 4 + state->sbytes, SEND_4TH_ARG,
|
---|
| 747 | (struct sockaddr *)&state->remote_addr,
|
---|
| 748 | state->remote_addrlen);
|
---|
| 749 | /* Check all sbytes were sent */
|
---|
| 750 | if(sbytes<0) {
|
---|
| 751 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 752 | result = CURLE_SEND_ERROR;
|
---|
| 753 | }
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | return result;
|
---|
| 757 | }
|
---|
| 758 | /* This is the expected packet. Reset the counters and send the next
|
---|
| 759 | block */
|
---|
| 760 | time(&state->rx_time);
|
---|
| 761 | state->block++;
|
---|
| 762 | }
|
---|
| 763 | else
|
---|
| 764 | state->block = 1; /* first data block is 1 when using OACK */
|
---|
| 765 |
|
---|
| 766 | state->retries = 0;
|
---|
| 767 | setpacketevent(&state->spacket, TFTP_EVENT_DATA);
|
---|
| 768 | setpacketblock(&state->spacket, state->block);
|
---|
| 769 | if(state->block > 1 && state->sbytes < (int)state->blksize) {
|
---|
| 770 | state->state = TFTP_STATE_FIN;
|
---|
| 771 | return CURLE_OK;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | /* TFTP considers data block size < 512 bytes as an end of session. So
|
---|
| 775 | * in some cases we must wait for additional data to build full (512 bytes)
|
---|
| 776 | * data block.
|
---|
| 777 | * */
|
---|
| 778 | state->sbytes = 0;
|
---|
| 779 | state->conn->data->req.upload_fromhere = (char *)state->spacket.data + 4;
|
---|
| 780 | do {
|
---|
| 781 | result = Curl_fillreadbuffer(state->conn, state->blksize - state->sbytes,
|
---|
| 782 | &cb);
|
---|
| 783 | if(result)
|
---|
| 784 | return result;
|
---|
| 785 | state->sbytes += cb;
|
---|
| 786 | state->conn->data->req.upload_fromhere += cb;
|
---|
| 787 | } while(state->sbytes < state->blksize && cb != 0);
|
---|
| 788 |
|
---|
| 789 | sbytes = sendto(state->sockfd, (void *) state->spacket.data,
|
---|
| 790 | 4 + state->sbytes, SEND_4TH_ARG,
|
---|
| 791 | (struct sockaddr *)&state->remote_addr,
|
---|
| 792 | state->remote_addrlen);
|
---|
| 793 | /* Check all sbytes were sent */
|
---|
| 794 | if(sbytes<0) {
|
---|
| 795 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 796 | return CURLE_SEND_ERROR;
|
---|
| 797 | }
|
---|
| 798 | /* Update the progress meter */
|
---|
| 799 | k->writebytecount += state->sbytes;
|
---|
| 800 | Curl_pgrsSetUploadCounter(data, k->writebytecount);
|
---|
| 801 | break;
|
---|
| 802 |
|
---|
| 803 | case TFTP_EVENT_TIMEOUT:
|
---|
| 804 | /* Increment the retry counter and log the timeout */
|
---|
| 805 | state->retries++;
|
---|
| 806 | infof(data, "Timeout waiting for block %d ACK. "
|
---|
| 807 | " Retries = %d\n", NEXT_BLOCKNUM(state->block), state->retries);
|
---|
| 808 | /* Decide if we've had enough */
|
---|
| 809 | if(state->retries > state->retry_max) {
|
---|
| 810 | state->error = TFTP_ERR_TIMEOUT;
|
---|
| 811 | state->state = TFTP_STATE_FIN;
|
---|
| 812 | }
|
---|
| 813 | else {
|
---|
| 814 | /* Re-send the data packet */
|
---|
| 815 | sbytes = sendto(state->sockfd, (void *)state->spacket.data,
|
---|
| 816 | 4 + state->sbytes, SEND_4TH_ARG,
|
---|
| 817 | (struct sockaddr *)&state->remote_addr,
|
---|
| 818 | state->remote_addrlen);
|
---|
| 819 | /* Check all sbytes were sent */
|
---|
| 820 | if(sbytes<0) {
|
---|
| 821 | failf(data, "%s", Curl_strerror(state->conn, SOCKERRNO));
|
---|
| 822 | return CURLE_SEND_ERROR;
|
---|
| 823 | }
|
---|
| 824 | /* since this was a re-send, we remain at the still byte position */
|
---|
| 825 | Curl_pgrsSetUploadCounter(data, k->writebytecount);
|
---|
| 826 | }
|
---|
| 827 | break;
|
---|
| 828 |
|
---|
| 829 | case TFTP_EVENT_ERROR:
|
---|
| 830 | state->state = TFTP_STATE_FIN;
|
---|
| 831 | setpacketevent(&state->spacket, TFTP_EVENT_ERROR);
|
---|
| 832 | setpacketblock(&state->spacket, state->block);
|
---|
| 833 | (void)sendto(state->sockfd, (void *)state->spacket.data, 4, SEND_4TH_ARG,
|
---|
| 834 | (struct sockaddr *)&state->remote_addr,
|
---|
| 835 | state->remote_addrlen);
|
---|
| 836 | /* don't bother with the return code, but if the socket is still up we
|
---|
| 837 | * should be a good TFTP client and let the server know we're done */
|
---|
| 838 | state->state = TFTP_STATE_FIN;
|
---|
| 839 | break;
|
---|
| 840 |
|
---|
| 841 | default:
|
---|
| 842 | failf(data, "tftp_tx: internal error, event: %i", (int)(event));
|
---|
| 843 | break;
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | return result;
|
---|
| 847 | }
|
---|
| 848 |
|
---|
| 849 | /**********************************************************
|
---|
| 850 | *
|
---|
| 851 | * tftp_translate_code
|
---|
| 852 | *
|
---|
| 853 | * Translate internal error codes to CURL error codes
|
---|
| 854 | *
|
---|
| 855 | **********************************************************/
|
---|
| 856 | static CURLcode tftp_translate_code(tftp_error_t error)
|
---|
| 857 | {
|
---|
| 858 | CURLcode result = CURLE_OK;
|
---|
| 859 |
|
---|
| 860 | if(error != TFTP_ERR_NONE) {
|
---|
| 861 | switch(error) {
|
---|
| 862 | case TFTP_ERR_NOTFOUND:
|
---|
| 863 | result = CURLE_TFTP_NOTFOUND;
|
---|
| 864 | break;
|
---|
| 865 | case TFTP_ERR_PERM:
|
---|
| 866 | result = CURLE_TFTP_PERM;
|
---|
| 867 | break;
|
---|
| 868 | case TFTP_ERR_DISKFULL:
|
---|
| 869 | result = CURLE_REMOTE_DISK_FULL;
|
---|
| 870 | break;
|
---|
| 871 | case TFTP_ERR_UNDEF:
|
---|
| 872 | case TFTP_ERR_ILLEGAL:
|
---|
| 873 | result = CURLE_TFTP_ILLEGAL;
|
---|
| 874 | break;
|
---|
| 875 | case TFTP_ERR_UNKNOWNID:
|
---|
| 876 | result = CURLE_TFTP_UNKNOWNID;
|
---|
| 877 | break;
|
---|
| 878 | case TFTP_ERR_EXISTS:
|
---|
| 879 | result = CURLE_REMOTE_FILE_EXISTS;
|
---|
| 880 | break;
|
---|
| 881 | case TFTP_ERR_NOSUCHUSER:
|
---|
| 882 | result = CURLE_TFTP_NOSUCHUSER;
|
---|
| 883 | break;
|
---|
| 884 | case TFTP_ERR_TIMEOUT:
|
---|
| 885 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
| 886 | break;
|
---|
| 887 | case TFTP_ERR_NORESPONSE:
|
---|
| 888 | result = CURLE_COULDNT_CONNECT;
|
---|
| 889 | break;
|
---|
| 890 | default:
|
---|
| 891 | result = CURLE_ABORTED_BY_CALLBACK;
|
---|
| 892 | break;
|
---|
| 893 | }
|
---|
| 894 | }
|
---|
| 895 | else
|
---|
| 896 | result = CURLE_OK;
|
---|
| 897 |
|
---|
| 898 | return result;
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | /**********************************************************
|
---|
| 902 | *
|
---|
| 903 | * tftp_state_machine
|
---|
| 904 | *
|
---|
| 905 | * The tftp state machine event dispatcher
|
---|
| 906 | *
|
---|
| 907 | **********************************************************/
|
---|
| 908 | static CURLcode tftp_state_machine(tftp_state_data_t *state,
|
---|
| 909 | tftp_event_t event)
|
---|
| 910 | {
|
---|
| 911 | CURLcode result = CURLE_OK;
|
---|
| 912 | struct Curl_easy *data = state->conn->data;
|
---|
| 913 |
|
---|
| 914 | switch(state->state) {
|
---|
| 915 | case TFTP_STATE_START:
|
---|
| 916 | DEBUGF(infof(data, "TFTP_STATE_START\n"));
|
---|
| 917 | result = tftp_send_first(state, event);
|
---|
| 918 | break;
|
---|
| 919 | case TFTP_STATE_RX:
|
---|
| 920 | DEBUGF(infof(data, "TFTP_STATE_RX\n"));
|
---|
| 921 | result = tftp_rx(state, event);
|
---|
| 922 | break;
|
---|
| 923 | case TFTP_STATE_TX:
|
---|
| 924 | DEBUGF(infof(data, "TFTP_STATE_TX\n"));
|
---|
| 925 | result = tftp_tx(state, event);
|
---|
| 926 | break;
|
---|
| 927 | case TFTP_STATE_FIN:
|
---|
| 928 | infof(data, "%s\n", "TFTP finished");
|
---|
| 929 | break;
|
---|
| 930 | default:
|
---|
| 931 | DEBUGF(infof(data, "STATE: %d\n", state->state));
|
---|
| 932 | failf(data, "%s", "Internal state machine error");
|
---|
| 933 | result = CURLE_TFTP_ILLEGAL;
|
---|
| 934 | break;
|
---|
| 935 | }
|
---|
| 936 |
|
---|
| 937 | return result;
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | /**********************************************************
|
---|
| 941 | *
|
---|
| 942 | * tftp_disconnect
|
---|
| 943 | *
|
---|
| 944 | * The disconnect callback
|
---|
| 945 | *
|
---|
| 946 | **********************************************************/
|
---|
| 947 | static CURLcode tftp_disconnect(struct connectdata *conn, bool dead_connection)
|
---|
| 948 | {
|
---|
| 949 | tftp_state_data_t *state = conn->proto.tftpc;
|
---|
| 950 | (void) dead_connection;
|
---|
| 951 |
|
---|
| 952 | /* done, free dynamically allocated pkt buffers */
|
---|
| 953 | if(state) {
|
---|
| 954 | Curl_safefree(state->rpacket.data);
|
---|
| 955 | Curl_safefree(state->spacket.data);
|
---|
| 956 | free(state);
|
---|
| 957 | }
|
---|
| 958 |
|
---|
| 959 | return CURLE_OK;
|
---|
| 960 | }
|
---|
| 961 |
|
---|
| 962 | /**********************************************************
|
---|
| 963 | *
|
---|
| 964 | * tftp_connect
|
---|
| 965 | *
|
---|
| 966 | * The connect callback
|
---|
| 967 | *
|
---|
| 968 | **********************************************************/
|
---|
| 969 | static CURLcode tftp_connect(struct connectdata *conn, bool *done)
|
---|
| 970 | {
|
---|
| 971 | tftp_state_data_t *state;
|
---|
| 972 | int blksize, rc;
|
---|
| 973 |
|
---|
| 974 | blksize = TFTP_BLKSIZE_DEFAULT;
|
---|
| 975 |
|
---|
| 976 | state = conn->proto.tftpc = calloc(1, sizeof(tftp_state_data_t));
|
---|
| 977 | if(!state)
|
---|
| 978 | return CURLE_OUT_OF_MEMORY;
|
---|
| 979 |
|
---|
| 980 | /* alloc pkt buffers based on specified blksize */
|
---|
| 981 | if(conn->data->set.tftp_blksize) {
|
---|
| 982 | blksize = (int)conn->data->set.tftp_blksize;
|
---|
| 983 | if(blksize > TFTP_BLKSIZE_MAX || blksize < TFTP_BLKSIZE_MIN)
|
---|
| 984 | return CURLE_TFTP_ILLEGAL;
|
---|
| 985 | }
|
---|
| 986 |
|
---|
| 987 | if(!state->rpacket.data) {
|
---|
| 988 | state->rpacket.data = calloc(1, blksize + 2 + 2);
|
---|
| 989 |
|
---|
| 990 | if(!state->rpacket.data)
|
---|
| 991 | return CURLE_OUT_OF_MEMORY;
|
---|
| 992 | }
|
---|
| 993 |
|
---|
| 994 | if(!state->spacket.data) {
|
---|
| 995 | state->spacket.data = calloc(1, blksize + 2 + 2);
|
---|
| 996 |
|
---|
| 997 | if(!state->spacket.data)
|
---|
| 998 | return CURLE_OUT_OF_MEMORY;
|
---|
| 999 | }
|
---|
| 1000 |
|
---|
| 1001 | /* we don't keep TFTP connections up basically because there's none or very
|
---|
| 1002 | * little gain for UDP */
|
---|
| 1003 | connclose(conn, "TFTP");
|
---|
| 1004 |
|
---|
| 1005 | state->conn = conn;
|
---|
| 1006 | state->sockfd = state->conn->sock[FIRSTSOCKET];
|
---|
| 1007 | state->state = TFTP_STATE_START;
|
---|
| 1008 | state->error = TFTP_ERR_NONE;
|
---|
| 1009 | state->blksize = TFTP_BLKSIZE_DEFAULT;
|
---|
| 1010 | state->requested_blksize = blksize;
|
---|
| 1011 |
|
---|
| 1012 | ((struct sockaddr *)&state->local_addr)->sa_family =
|
---|
| 1013 | (unsigned short)(conn->ip_addr->ai_family);
|
---|
| 1014 |
|
---|
| 1015 | tftp_set_timeouts(state);
|
---|
| 1016 |
|
---|
| 1017 | if(!conn->bits.bound) {
|
---|
| 1018 | /* If not already bound, bind to any interface, random UDP port. If it is
|
---|
| 1019 | * reused or a custom local port was desired, this has already been done!
|
---|
| 1020 | *
|
---|
| 1021 | * We once used the size of the local_addr struct as the third argument
|
---|
| 1022 | * for bind() to better work with IPv6 or whatever size the struct could
|
---|
| 1023 | * have, but we learned that at least Tru64, AIX and IRIX *requires* the
|
---|
| 1024 | * size of that argument to match the exact size of a 'sockaddr_in' struct
|
---|
| 1025 | * when running IPv4-only.
|
---|
| 1026 | *
|
---|
| 1027 | * Therefore we use the size from the address we connected to, which we
|
---|
| 1028 | * assume uses the same IP version and thus hopefully this works for both
|
---|
| 1029 | * IPv4 and IPv6...
|
---|
| 1030 | */
|
---|
| 1031 | rc = bind(state->sockfd, (struct sockaddr *)&state->local_addr,
|
---|
| 1032 | conn->ip_addr->ai_addrlen);
|
---|
| 1033 | if(rc) {
|
---|
| 1034 | failf(conn->data, "bind() failed; %s",
|
---|
| 1035 | Curl_strerror(conn, SOCKERRNO));
|
---|
| 1036 | return CURLE_COULDNT_CONNECT;
|
---|
| 1037 | }
|
---|
| 1038 | conn->bits.bound = TRUE;
|
---|
| 1039 | }
|
---|
| 1040 |
|
---|
| 1041 | Curl_pgrsStartNow(conn->data);
|
---|
| 1042 |
|
---|
| 1043 | *done = TRUE;
|
---|
| 1044 |
|
---|
| 1045 | return CURLE_OK;
|
---|
| 1046 | }
|
---|
| 1047 |
|
---|
| 1048 | /**********************************************************
|
---|
| 1049 | *
|
---|
| 1050 | * tftp_done
|
---|
| 1051 | *
|
---|
| 1052 | * The done callback
|
---|
| 1053 | *
|
---|
| 1054 | **********************************************************/
|
---|
| 1055 | static CURLcode tftp_done(struct connectdata *conn, CURLcode status,
|
---|
| 1056 | bool premature)
|
---|
| 1057 | {
|
---|
| 1058 | CURLcode result = CURLE_OK;
|
---|
| 1059 | tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1060 |
|
---|
| 1061 | (void)status; /* unused */
|
---|
| 1062 | (void)premature; /* not used */
|
---|
| 1063 |
|
---|
| 1064 | if(Curl_pgrsDone(conn))
|
---|
| 1065 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
| 1066 |
|
---|
| 1067 | /* If we have encountered an error */
|
---|
| 1068 | if(state)
|
---|
| 1069 | result = tftp_translate_code(state->error);
|
---|
| 1070 |
|
---|
| 1071 | return result;
|
---|
| 1072 | }
|
---|
| 1073 |
|
---|
| 1074 | /**********************************************************
|
---|
| 1075 | *
|
---|
| 1076 | * tftp_getsock
|
---|
| 1077 | *
|
---|
| 1078 | * The getsock callback
|
---|
| 1079 | *
|
---|
| 1080 | **********************************************************/
|
---|
| 1081 | static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
| 1082 | int numsocks)
|
---|
| 1083 | {
|
---|
| 1084 | if(!numsocks)
|
---|
| 1085 | return GETSOCK_BLANK;
|
---|
| 1086 |
|
---|
| 1087 | socks[0] = conn->sock[FIRSTSOCKET];
|
---|
| 1088 |
|
---|
| 1089 | return GETSOCK_READSOCK(0);
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | /**********************************************************
|
---|
| 1093 | *
|
---|
| 1094 | * tftp_receive_packet
|
---|
| 1095 | *
|
---|
| 1096 | * Called once select fires and data is ready on the socket
|
---|
| 1097 | *
|
---|
| 1098 | **********************************************************/
|
---|
| 1099 | static CURLcode tftp_receive_packet(struct connectdata *conn)
|
---|
| 1100 | {
|
---|
| 1101 | struct Curl_sockaddr_storage fromaddr;
|
---|
| 1102 | curl_socklen_t fromlen;
|
---|
| 1103 | CURLcode result = CURLE_OK;
|
---|
| 1104 | struct Curl_easy *data = conn->data;
|
---|
| 1105 | tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1106 | struct SingleRequest *k = &data->req;
|
---|
| 1107 |
|
---|
| 1108 | /* Receive the packet */
|
---|
| 1109 | fromlen = sizeof(fromaddr);
|
---|
| 1110 | state->rbytes = (int)recvfrom(state->sockfd,
|
---|
| 1111 | (void *)state->rpacket.data,
|
---|
| 1112 | state->blksize + 4,
|
---|
| 1113 | 0,
|
---|
| 1114 | (struct sockaddr *)&fromaddr,
|
---|
| 1115 | &fromlen);
|
---|
| 1116 | if(state->remote_addrlen == 0) {
|
---|
| 1117 | memcpy(&state->remote_addr, &fromaddr, fromlen);
|
---|
| 1118 | state->remote_addrlen = fromlen;
|
---|
| 1119 | }
|
---|
| 1120 |
|
---|
| 1121 | /* Sanity check packet length */
|
---|
| 1122 | if(state->rbytes < 4) {
|
---|
| 1123 | failf(data, "Received too short packet");
|
---|
| 1124 | /* Not a timeout, but how best to handle it? */
|
---|
| 1125 | state->event = TFTP_EVENT_TIMEOUT;
|
---|
| 1126 | }
|
---|
| 1127 | else {
|
---|
| 1128 | /* The event is given by the TFTP packet time */
|
---|
| 1129 | unsigned short event = getrpacketevent(&state->rpacket);
|
---|
| 1130 | state->event = (tftp_event_t)event;
|
---|
| 1131 |
|
---|
| 1132 | switch(state->event) {
|
---|
| 1133 | case TFTP_EVENT_DATA:
|
---|
| 1134 | /* Don't pass to the client empty or retransmitted packets */
|
---|
| 1135 | if(state->rbytes > 4 &&
|
---|
| 1136 | (NEXT_BLOCKNUM(state->block) == getrpacketblock(&state->rpacket))) {
|
---|
| 1137 | result = Curl_client_write(conn, CLIENTWRITE_BODY,
|
---|
| 1138 | (char *)state->rpacket.data + 4,
|
---|
| 1139 | state->rbytes-4);
|
---|
| 1140 | if(result) {
|
---|
| 1141 | tftp_state_machine(state, TFTP_EVENT_ERROR);
|
---|
| 1142 | return result;
|
---|
| 1143 | }
|
---|
| 1144 | k->bytecount += state->rbytes-4;
|
---|
| 1145 | Curl_pgrsSetDownloadCounter(data, (curl_off_t) k->bytecount);
|
---|
| 1146 | }
|
---|
| 1147 | break;
|
---|
| 1148 | case TFTP_EVENT_ERROR:
|
---|
| 1149 | {
|
---|
| 1150 | unsigned short error = getrpacketblock(&state->rpacket);
|
---|
| 1151 | state->error = (tftp_error_t)error;
|
---|
| 1152 | infof(data, "%s\n", (const char *)state->rpacket.data + 4);
|
---|
| 1153 | break;
|
---|
| 1154 | }
|
---|
| 1155 | case TFTP_EVENT_ACK:
|
---|
| 1156 | break;
|
---|
| 1157 | case TFTP_EVENT_OACK:
|
---|
| 1158 | result = tftp_parse_option_ack(state,
|
---|
| 1159 | (const char *)state->rpacket.data + 2,
|
---|
| 1160 | state->rbytes-2);
|
---|
| 1161 | if(result)
|
---|
| 1162 | return result;
|
---|
| 1163 | break;
|
---|
| 1164 | case TFTP_EVENT_RRQ:
|
---|
| 1165 | case TFTP_EVENT_WRQ:
|
---|
| 1166 | default:
|
---|
| 1167 | failf(data, "%s", "Internal error: Unexpected packet");
|
---|
| 1168 | break;
|
---|
| 1169 | }
|
---|
| 1170 |
|
---|
| 1171 | /* Update the progress meter */
|
---|
| 1172 | if(Curl_pgrsUpdate(conn)) {
|
---|
| 1173 | tftp_state_machine(state, TFTP_EVENT_ERROR);
|
---|
| 1174 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
| 1175 | }
|
---|
| 1176 | }
|
---|
| 1177 | return result;
|
---|
| 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | /**********************************************************
|
---|
| 1181 | *
|
---|
| 1182 | * tftp_state_timeout
|
---|
| 1183 | *
|
---|
| 1184 | * Check if timeouts have been reached
|
---|
| 1185 | *
|
---|
| 1186 | **********************************************************/
|
---|
| 1187 | static long tftp_state_timeout(struct connectdata *conn, tftp_event_t *event)
|
---|
| 1188 | {
|
---|
| 1189 | time_t current;
|
---|
| 1190 | tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1191 |
|
---|
| 1192 | if(event)
|
---|
| 1193 | *event = TFTP_EVENT_NONE;
|
---|
| 1194 |
|
---|
| 1195 | time(¤t);
|
---|
| 1196 | if(current > state->max_time) {
|
---|
| 1197 | DEBUGF(infof(conn->data, "timeout: %ld > %ld\n",
|
---|
| 1198 | (long)current, (long)state->max_time));
|
---|
| 1199 | state->error = TFTP_ERR_TIMEOUT;
|
---|
| 1200 | state->state = TFTP_STATE_FIN;
|
---|
| 1201 | return 0;
|
---|
| 1202 | }
|
---|
| 1203 | if(current > state->rx_time + state->retry_time) {
|
---|
| 1204 | if(event)
|
---|
| 1205 | *event = TFTP_EVENT_TIMEOUT;
|
---|
| 1206 | time(&state->rx_time); /* update even though we received nothing */
|
---|
| 1207 | }
|
---|
| 1208 |
|
---|
| 1209 | /* there's a typecast below here since 'time_t' may in fact be larger than
|
---|
| 1210 | 'long', but we estimate that a 'long' will still be able to hold number
|
---|
| 1211 | of seconds even if "only" 32 bit */
|
---|
| 1212 | return (long)(state->max_time - current);
|
---|
| 1213 | }
|
---|
| 1214 |
|
---|
| 1215 | /**********************************************************
|
---|
| 1216 | *
|
---|
| 1217 | * tftp_multi_statemach
|
---|
| 1218 | *
|
---|
| 1219 | * Handle single RX socket event and return
|
---|
| 1220 | *
|
---|
| 1221 | **********************************************************/
|
---|
| 1222 | static CURLcode tftp_multi_statemach(struct connectdata *conn, bool *done)
|
---|
| 1223 | {
|
---|
| 1224 | int rc;
|
---|
| 1225 | tftp_event_t event;
|
---|
| 1226 | CURLcode result = CURLE_OK;
|
---|
| 1227 | struct Curl_easy *data = conn->data;
|
---|
| 1228 | tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1229 | long timeout_ms = tftp_state_timeout(conn, &event);
|
---|
| 1230 |
|
---|
| 1231 | *done = FALSE;
|
---|
| 1232 |
|
---|
| 1233 | if(timeout_ms <= 0) {
|
---|
| 1234 | failf(data, "TFTP response timeout");
|
---|
| 1235 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 1236 | }
|
---|
| 1237 | if(event != TFTP_EVENT_NONE) {
|
---|
| 1238 | result = tftp_state_machine(state, event);
|
---|
| 1239 | if(result)
|
---|
| 1240 | return result;
|
---|
| 1241 | *done = (state->state == TFTP_STATE_FIN) ? TRUE : FALSE;
|
---|
| 1242 | if(*done)
|
---|
| 1243 | /* Tell curl we're done */
|
---|
| 1244 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 1245 | }
|
---|
| 1246 | else {
|
---|
| 1247 | /* no timeouts to handle, check our socket */
|
---|
| 1248 | rc = SOCKET_READABLE(state->sockfd, 0);
|
---|
| 1249 |
|
---|
| 1250 | if(rc == -1) {
|
---|
| 1251 | /* bail out */
|
---|
| 1252 | int error = SOCKERRNO;
|
---|
| 1253 | failf(data, "%s", Curl_strerror(conn, error));
|
---|
| 1254 | state->event = TFTP_EVENT_ERROR;
|
---|
| 1255 | }
|
---|
| 1256 | else if(rc != 0) {
|
---|
| 1257 | result = tftp_receive_packet(conn);
|
---|
| 1258 | if(result)
|
---|
| 1259 | return result;
|
---|
| 1260 | result = tftp_state_machine(state, state->event);
|
---|
| 1261 | if(result)
|
---|
| 1262 | return result;
|
---|
| 1263 | *done = (state->state == TFTP_STATE_FIN) ? TRUE : FALSE;
|
---|
| 1264 | if(*done)
|
---|
| 1265 | /* Tell curl we're done */
|
---|
| 1266 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 1267 | }
|
---|
| 1268 | /* if rc == 0, then select() timed out */
|
---|
| 1269 | }
|
---|
| 1270 |
|
---|
| 1271 | return result;
|
---|
| 1272 | }
|
---|
| 1273 |
|
---|
| 1274 | /**********************************************************
|
---|
| 1275 | *
|
---|
| 1276 | * tftp_doing
|
---|
| 1277 | *
|
---|
| 1278 | * Called from multi.c while DOing
|
---|
| 1279 | *
|
---|
| 1280 | **********************************************************/
|
---|
| 1281 | static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done)
|
---|
| 1282 | {
|
---|
| 1283 | CURLcode result;
|
---|
| 1284 | result = tftp_multi_statemach(conn, dophase_done);
|
---|
| 1285 |
|
---|
| 1286 | if(*dophase_done) {
|
---|
| 1287 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
| 1288 | }
|
---|
| 1289 | else if(!result) {
|
---|
| 1290 | /* The multi code doesn't have this logic for the DOING state so we
|
---|
| 1291 | provide it for TFTP since it may do the entire transfer in this
|
---|
| 1292 | state. */
|
---|
| 1293 | if(Curl_pgrsUpdate(conn))
|
---|
| 1294 | result = CURLE_ABORTED_BY_CALLBACK;
|
---|
| 1295 | else
|
---|
| 1296 | result = Curl_speedcheck(conn->data, Curl_now());
|
---|
| 1297 | }
|
---|
| 1298 | return result;
|
---|
| 1299 | }
|
---|
| 1300 |
|
---|
| 1301 | /**********************************************************
|
---|
| 1302 | *
|
---|
| 1303 | * tftp_peform
|
---|
| 1304 | *
|
---|
| 1305 | * Entry point for transfer from tftp_do, sarts state mach
|
---|
| 1306 | *
|
---|
| 1307 | **********************************************************/
|
---|
| 1308 | static CURLcode tftp_perform(struct connectdata *conn, bool *dophase_done)
|
---|
| 1309 | {
|
---|
| 1310 | CURLcode result = CURLE_OK;
|
---|
| 1311 | tftp_state_data_t *state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1312 |
|
---|
| 1313 | *dophase_done = FALSE;
|
---|
| 1314 |
|
---|
| 1315 | result = tftp_state_machine(state, TFTP_EVENT_INIT);
|
---|
| 1316 |
|
---|
| 1317 | if((state->state == TFTP_STATE_FIN) || result)
|
---|
| 1318 | return result;
|
---|
| 1319 |
|
---|
| 1320 | tftp_multi_statemach(conn, dophase_done);
|
---|
| 1321 |
|
---|
| 1322 | if(*dophase_done)
|
---|
| 1323 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
| 1324 |
|
---|
| 1325 | return result;
|
---|
| 1326 | }
|
---|
| 1327 |
|
---|
| 1328 |
|
---|
| 1329 | /**********************************************************
|
---|
| 1330 | *
|
---|
| 1331 | * tftp_do
|
---|
| 1332 | *
|
---|
| 1333 | * The do callback
|
---|
| 1334 | *
|
---|
| 1335 | * This callback initiates the TFTP transfer
|
---|
| 1336 | *
|
---|
| 1337 | **********************************************************/
|
---|
| 1338 |
|
---|
| 1339 | static CURLcode tftp_do(struct connectdata *conn, bool *done)
|
---|
| 1340 | {
|
---|
| 1341 | tftp_state_data_t *state;
|
---|
| 1342 | CURLcode result;
|
---|
| 1343 |
|
---|
| 1344 | *done = FALSE;
|
---|
| 1345 |
|
---|
| 1346 | if(!conn->proto.tftpc) {
|
---|
| 1347 | result = tftp_connect(conn, done);
|
---|
| 1348 | if(result)
|
---|
| 1349 | return result;
|
---|
| 1350 | }
|
---|
| 1351 |
|
---|
| 1352 | state = (tftp_state_data_t *)conn->proto.tftpc;
|
---|
| 1353 | if(!state)
|
---|
| 1354 | return CURLE_TFTP_ILLEGAL;
|
---|
| 1355 |
|
---|
| 1356 | result = tftp_perform(conn, done);
|
---|
| 1357 |
|
---|
| 1358 | /* If tftp_perform() returned an error, use that for return code. If it
|
---|
| 1359 | was OK, see if tftp_translate_code() has an error. */
|
---|
| 1360 | if(!result)
|
---|
| 1361 | /* If we have encountered an internal tftp error, translate it. */
|
---|
| 1362 | result = tftp_translate_code(state->error);
|
---|
| 1363 |
|
---|
| 1364 | return result;
|
---|
| 1365 | }
|
---|
| 1366 |
|
---|
| 1367 | static CURLcode tftp_setup_connection(struct connectdata * conn)
|
---|
| 1368 | {
|
---|
| 1369 | struct Curl_easy *data = conn->data;
|
---|
| 1370 | char *type;
|
---|
| 1371 | char command;
|
---|
| 1372 |
|
---|
| 1373 | conn->socktype = SOCK_DGRAM; /* UDP datagram based */
|
---|
| 1374 |
|
---|
| 1375 | /* TFTP URLs support an extension like ";mode=<typecode>" that
|
---|
| 1376 | * we'll try to get now! */
|
---|
| 1377 | type = strstr(data->state.path, ";mode=");
|
---|
| 1378 |
|
---|
| 1379 | if(!type)
|
---|
| 1380 | type = strstr(conn->host.rawalloc, ";mode=");
|
---|
| 1381 |
|
---|
| 1382 | if(type) {
|
---|
| 1383 | *type = 0; /* it was in the middle of the hostname */
|
---|
| 1384 | command = Curl_raw_toupper(type[6]);
|
---|
| 1385 |
|
---|
| 1386 | switch(command) {
|
---|
| 1387 | case 'A': /* ASCII mode */
|
---|
| 1388 | case 'N': /* NETASCII mode */
|
---|
| 1389 | data->set.prefer_ascii = TRUE;
|
---|
| 1390 | break;
|
---|
| 1391 |
|
---|
| 1392 | case 'O': /* octet mode */
|
---|
| 1393 | case 'I': /* binary mode */
|
---|
| 1394 | default:
|
---|
| 1395 | /* switch off ASCII */
|
---|
| 1396 | data->set.prefer_ascii = FALSE;
|
---|
| 1397 | break;
|
---|
| 1398 | }
|
---|
| 1399 | }
|
---|
| 1400 |
|
---|
| 1401 | return CURLE_OK;
|
---|
| 1402 | }
|
---|
| 1403 | #endif
|
---|