| File: | src/usr.bin/tftp/tftp.c |
| Warning: | line 607, column 16 Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' |
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| 1 | /* $OpenBSD: tftp.c,v 1.25 2017/09/10 07:29:39 tb Exp $ */ |
| 2 | /* $NetBSD: tftp.c,v 1.5 1995/04/29 05:55:25 cgd Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1983, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * TFTP User Program -- Protocol Machines |
| 35 | * |
| 36 | * This version includes many modifications by Jim Guyton <guyton@rand-unix> |
| 37 | */ |
| 38 | |
| 39 | #include <sys/types.h> |
| 40 | #include <sys/socket.h> |
| 41 | #include <sys/time.h> |
| 42 | #include <sys/stat.h> |
| 43 | |
| 44 | #include <netinet/in.h> |
| 45 | #include <arpa/tftp.h> |
| 46 | |
| 47 | #include <err.h> |
| 48 | #include <errno(*__errno()).h> |
| 49 | #include <poll.h> |
| 50 | #include <signal.h> |
| 51 | #include <stdio.h> |
| 52 | #include <stddef.h> |
| 53 | #include <stdlib.h> |
| 54 | #include <string.h> |
| 55 | #include <time.h> |
| 56 | #include <unistd.h> |
| 57 | #include <netdb.h> |
| 58 | |
| 59 | #include "extern.h" |
| 60 | #include "tftpsubs.h" |
| 61 | |
| 62 | static int cmpport(struct sockaddr *, struct sockaddr *); |
| 63 | static int makerequest(int, const char *, struct tftphdr *, const char *); |
| 64 | static void nak(int, struct sockaddr *); |
| 65 | static void tpacket(const char *, struct tftphdr *, int); |
| 66 | static void startclock(void); |
| 67 | static void stopclock(void); |
| 68 | static void printstats(const char *, unsigned long); |
| 69 | static void printtimeout(void); |
| 70 | static void oack(struct tftphdr *, int, int); |
| 71 | static int oack_set(const char *, const char *); |
| 72 | |
| 73 | extern struct sockaddr_storage peeraddr; /* filled in by main */ |
| 74 | extern int f; /* the opened socket */ |
| 75 | extern int trace; |
| 76 | extern int verbose; |
| 77 | extern int rexmtval; |
| 78 | extern int maxtimeout; |
| 79 | extern FILE *file; |
| 80 | extern volatile sig_atomic_t intrflag; |
| 81 | extern char *ackbuf; |
| 82 | extern int has_options; |
| 83 | extern int opt_tsize; |
| 84 | extern int opt_tout; |
| 85 | extern int opt_blksize; |
| 86 | |
| 87 | struct timespec tstart; |
| 88 | struct timespec tstop; |
| 89 | unsigned int segment_size = SEGSIZE512; |
| 90 | unsigned int packet_size = SEGSIZE512 + 4; |
| 91 | |
| 92 | struct errmsg { |
| 93 | int e_code; |
| 94 | char *e_msg; |
| 95 | } errmsgs[] = { |
| 96 | { EUNDEF0, "Undefined error code" }, |
| 97 | { ENOTFOUND1, "File not found" }, |
| 98 | { EACCESS2, "Access violation" }, |
| 99 | { ENOSPACE3, "Disk full or allocation exceeded" }, |
| 100 | { EBADOP4, "Illegal TFTP operation" }, |
| 101 | { EBADID5, "Unknown transfer ID" }, |
| 102 | { EEXISTS6, "File already exists" }, |
| 103 | { ENOUSER7, "No such user" }, |
| 104 | { EOPTNEG8, "Option negotiation failed" }, |
| 105 | { -1, NULL((void*)0) } |
| 106 | }; |
| 107 | |
| 108 | struct options { |
| 109 | const char *o_type; |
| 110 | } options[] = { |
| 111 | { "tsize" }, |
| 112 | { "timeout" }, |
| 113 | { "blksize" }, |
| 114 | { NULL((void*)0) } |
| 115 | }; |
| 116 | |
| 117 | enum opt_enum { |
| 118 | OPT_TSIZE = 0, |
| 119 | OPT_TIMEOUT, |
| 120 | OPT_BLKSIZE |
| 121 | }; |
| 122 | |
| 123 | /* |
| 124 | * Send the requested file. |
| 125 | */ |
| 126 | void |
| 127 | sendfile(int fd, char *name, char *mode) |
| 128 | { |
| 129 | struct tftphdr *dp, *ap; /* data and ack packets */ |
| 130 | struct sockaddr_storage from, peer; |
| 131 | struct sockaddr_storage serv; /* valid server port number */ |
| 132 | struct pollfd pfd[1]; |
| 133 | unsigned long amount; |
| 134 | socklen_t fromlen; |
| 135 | int convert; /* true if converting crlf -> lf */ |
| 136 | int n, nfds, error, timeouts, size; |
| 137 | uint16_t block = 0; |
| 138 | int firsttrip = 1; |
| 139 | |
| 140 | startclock(); /* start stat's clock */ |
| 141 | dp = r_init(); /* reset fillbuf/read-ahead code */ |
| 142 | ap = (struct tftphdr *)ackbuf; |
| 143 | file = fdopen(fd, "r"); |
| 144 | convert = !strcmp(mode, "netascii"); |
| 145 | amount = 0; |
| 146 | memcpy(&peer, &peeraddr, peeraddr.ss_len); |
| 147 | memset(&serv, 0, sizeof(serv)); |
| 148 | |
| 149 | do { |
| 150 | /* read data from file */ |
| 151 | if (firsttrip) |
| 152 | size = makerequest(WRQ02, name, dp, mode) - 4; |
| 153 | else { |
| 154 | size = readit(file, &dp, convert, segment_size); |
| 155 | if (size < 0) { |
| 156 | nak(errno(*__errno()) + 100, (struct sockaddr *)&peer); |
| 157 | break; |
| 158 | } |
| 159 | dp->th_opcode = htons((u_short)DATA)(__uint16_t)(__builtin_constant_p((u_short)03) ? (__uint16_t) (((__uint16_t)((u_short)03) & 0xffU) << 8 | ((__uint16_t )((u_short)03) & 0xff00U) >> 8) : __swap16md((u_short )03)); |
| 160 | dp->th_blockth_u.tu_block = htons(block)(__uint16_t)(__builtin_constant_p(block) ? (__uint16_t)(((__uint16_t )(block) & 0xffU) << 8 | ((__uint16_t)(block) & 0xff00U) >> 8) : __swap16md(block)); |
| 161 | } |
| 162 | |
| 163 | /* send data to server and wait for server ACK */ |
| 164 | for (timeouts = 0, error = 0; !intrflag;) { |
| 165 | if (timeouts >= maxtimeout) { |
| 166 | printtimeout(); |
| 167 | goto abort; |
| 168 | } |
| 169 | |
| 170 | if (!error) { |
| 171 | if (trace) |
| 172 | tpacket("sent", dp, size + 4); |
| 173 | if (sendto(f, dp, size + 4, 0, |
| 174 | (struct sockaddr *)&peer, |
| 175 | peer.ss_len) != size + 4) { |
| 176 | warn("sendto"); |
| 177 | goto abort; |
| 178 | } |
| 179 | if (!firsttrip) |
| 180 | read_ahead(file, convert, segment_size); |
| 181 | } |
| 182 | error = 0; |
| 183 | |
| 184 | pfd[0].fd = f; |
| 185 | pfd[0].events = POLLIN0x0001; |
| 186 | nfds = poll(pfd, 1, rexmtval * 1000); |
| 187 | if (nfds == 0) { |
| 188 | timeouts += rexmtval; |
| 189 | continue; |
| 190 | } |
| 191 | if (nfds == -1) { |
| 192 | error = 1; |
| 193 | if (errno(*__errno()) == EINTR4) |
| 194 | continue; |
| 195 | warn("poll"); |
| 196 | goto abort; |
| 197 | } |
| 198 | fromlen = sizeof(from); |
| 199 | n = recvfrom(f, ackbuf, packet_size, 0, |
| 200 | (struct sockaddr *)&from, &fromlen); |
| 201 | if (n == 0) { |
| 202 | warn("recvfrom"); |
| 203 | goto abort; |
| 204 | } |
| 205 | if (n == -1) { |
| 206 | error = 1; |
| 207 | if (errno(*__errno()) == EINTR4) |
| 208 | continue; |
| 209 | warn("recvfrom"); |
| 210 | goto abort; |
| 211 | } |
| 212 | if (!serv.ss_family) |
| 213 | serv = from; |
| 214 | else if (!cmpport((struct sockaddr *)&serv, |
| 215 | (struct sockaddr *)&from)) { |
| 216 | warn("server port mismatch"); |
| 217 | goto abort; |
| 218 | } |
| 219 | peer = from; |
| 220 | if (trace) |
| 221 | tpacket("received", ap, n); |
| 222 | |
| 223 | ap->th_opcode = ntohs(ap->th_opcode)(__uint16_t)(__builtin_constant_p(ap->th_opcode) ? (__uint16_t )(((__uint16_t)(ap->th_opcode) & 0xffU) << 8 | ( (__uint16_t)(ap->th_opcode) & 0xff00U) >> 8) : __swap16md (ap->th_opcode)); |
| 224 | |
| 225 | if (ap->th_opcode == OACK06) { |
| 226 | oack(ap, n, 0); |
| 227 | break; |
| 228 | } |
| 229 | |
| 230 | ap->th_blockth_u.tu_block = ntohs(ap->th_block)(__uint16_t)(__builtin_constant_p(ap->th_u.tu_block) ? (__uint16_t )(((__uint16_t)(ap->th_u.tu_block) & 0xffU) << 8 | ((__uint16_t)(ap->th_u.tu_block) & 0xff00U) >> 8) : __swap16md(ap->th_u.tu_block)); |
| 231 | |
| 232 | if (ap->th_opcode == ERROR05) { |
| 233 | printf("Error code %d: %s\n", |
| 234 | ap->th_codeth_u.tu_code, ap->th_msgth_data); |
| 235 | goto abort; |
| 236 | } |
| 237 | if (ap->th_opcode == ACK04) { |
| 238 | int j; |
| 239 | if (ap->th_blockth_u.tu_block == block) |
| 240 | break; |
| 241 | /* re-synchronize with other side */ |
| 242 | j = synchnet(f); |
| 243 | if (j && trace) |
| 244 | printf("discarded %d packets\n", j); |
| 245 | if (ap->th_blockth_u.tu_block == (block - 1)) |
| 246 | continue; |
| 247 | } |
| 248 | error = 1; /* received packet does not match */ |
| 249 | } |
| 250 | |
| 251 | if (firsttrip) { |
| 252 | size = segment_size; |
| 253 | firsttrip = 0; |
| 254 | } else |
| 255 | amount += size; |
| 256 | block++; |
| 257 | } while ((size == segment_size) && !intrflag); |
| 258 | |
| 259 | abort: |
| 260 | fclose(file); |
| 261 | stopclock(); |
| 262 | if (amount > 0) { |
| 263 | if (intrflag) |
| 264 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 265 | printstats("Sent", amount); |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Receive a file. |
| 271 | */ |
| 272 | void |
| 273 | recvfile(int fd, char *name, char *mode) |
| 274 | { |
| 275 | struct tftphdr *dp, *ap; /* data and ack packets */ |
| 276 | struct sockaddr_storage from, peer; |
| 277 | struct sockaddr_storage serv; /* valid server port number */ |
| 278 | struct pollfd pfd[1]; |
| 279 | unsigned long amount; |
| 280 | socklen_t fromlen; |
| 281 | int convert; /* true if converting crlf -> lf */ |
| 282 | int n, nfds, error, timeouts, size; |
| 283 | int firsttrip; |
| 284 | uint16_t block; |
| 285 | |
| 286 | startclock(); /* start stat's clock */ |
| 287 | dp = w_init(); /* reset fillbuf/read-ahead code */ |
| 288 | ap = (struct tftphdr *)ackbuf; |
| 289 | file = fdopen(fd, "w"); |
| 290 | convert = !strcmp(mode, "netascii"); |
| 291 | n = 0; |
| 292 | block = 1; |
| 293 | amount = 0; |
| 294 | firsttrip = 1; |
| 295 | memcpy(&peer, &peeraddr, peeraddr.ss_len); |
| 296 | memset(&serv, 0, sizeof(serv)); |
| 297 | |
| 298 | options: |
| 299 | do { |
| 300 | /* create new ACK packet */ |
| 301 | if (firsttrip) { |
| 302 | size = makerequest(RRQ01, name, ap, mode); |
| 303 | firsttrip = 0; |
| 304 | } else { |
| 305 | ap->th_opcode = htons((u_short)ACK)(__uint16_t)(__builtin_constant_p((u_short)04) ? (__uint16_t) (((__uint16_t)((u_short)04) & 0xffU) << 8 | ((__uint16_t )((u_short)04) & 0xff00U) >> 8) : __swap16md((u_short )04)); |
| 306 | ap->th_blockth_u.tu_block = htons(block)(__uint16_t)(__builtin_constant_p(block) ? (__uint16_t)(((__uint16_t )(block) & 0xffU) << 8 | ((__uint16_t)(block) & 0xff00U) >> 8) : __swap16md(block)); |
| 307 | size = 4; |
| 308 | block++; |
| 309 | } |
| 310 | |
| 311 | /* send ACK to server and wait for server data */ |
| 312 | for (timeouts = 0, error = 0; !intrflag;) { |
| 313 | if (timeouts >= maxtimeout) { |
| 314 | printtimeout(); |
| 315 | goto abort; |
| 316 | } |
| 317 | |
| 318 | if (!error) { |
| 319 | if (trace) |
| 320 | tpacket("sent", ap, size); |
| 321 | if (sendto(f, ackbuf, size, 0, |
| 322 | (struct sockaddr *)&peer, |
| 323 | peer.ss_len) != size) { |
| 324 | warn("sendto"); |
| 325 | goto abort; |
| 326 | } |
| 327 | write_behind(file, convert); |
| 328 | } |
| 329 | error = 0; |
| 330 | |
| 331 | pfd[0].fd = f; |
| 332 | pfd[0].events = POLLIN0x0001; |
| 333 | nfds = poll(pfd, 1, rexmtval * 1000); |
| 334 | if (nfds == 0) { |
| 335 | timeouts += rexmtval; |
| 336 | continue; |
| 337 | } |
| 338 | if (nfds == -1) { |
| 339 | error = 1; |
| 340 | if (errno(*__errno()) == EINTR4) |
| 341 | continue; |
| 342 | warn("poll"); |
| 343 | goto abort; |
| 344 | } |
| 345 | fromlen = sizeof(from); |
| 346 | n = recvfrom(f, dp, packet_size, 0, |
| 347 | (struct sockaddr *)&from, &fromlen); |
| 348 | if (n == 0) { |
| 349 | warn("recvfrom"); |
| 350 | goto abort; |
| 351 | } |
| 352 | if (n == -1) { |
| 353 | error = 1; |
| 354 | if (errno(*__errno()) == EINTR4) |
| 355 | continue; |
| 356 | warn("recvfrom"); |
| 357 | goto abort; |
| 358 | } |
| 359 | if (!serv.ss_family) |
| 360 | serv = from; |
| 361 | else if (!cmpport((struct sockaddr *)&serv, |
| 362 | (struct sockaddr *)&from)) { |
| 363 | warn("server port mismatch"); |
| 364 | goto abort; |
| 365 | } |
| 366 | peer = from; |
| 367 | if (trace) |
| 368 | tpacket("received", dp, n); |
| 369 | |
| 370 | dp->th_opcode = ntohs(dp->th_opcode)(__uint16_t)(__builtin_constant_p(dp->th_opcode) ? (__uint16_t )(((__uint16_t)(dp->th_opcode) & 0xffU) << 8 | ( (__uint16_t)(dp->th_opcode) & 0xff00U) >> 8) : __swap16md (dp->th_opcode)); |
| 371 | |
| 372 | if (dp->th_opcode == OACK06) { |
| 373 | oack(dp, n, 0); |
| 374 | block = 0; |
| 375 | goto options; |
| 376 | } |
| 377 | |
| 378 | dp->th_blockth_u.tu_block = ntohs(dp->th_block)(__uint16_t)(__builtin_constant_p(dp->th_u.tu_block) ? (__uint16_t )(((__uint16_t)(dp->th_u.tu_block) & 0xffU) << 8 | ((__uint16_t)(dp->th_u.tu_block) & 0xff00U) >> 8) : __swap16md(dp->th_u.tu_block)); |
| 379 | |
| 380 | if (dp->th_opcode == ERROR05) { |
| 381 | printf("Error code %d: %s\n", |
| 382 | dp->th_codeth_u.tu_code, dp->th_msgth_data); |
| 383 | goto abort; |
| 384 | } |
| 385 | if (dp->th_opcode == DATA03) { |
| 386 | int j; |
| 387 | if (dp->th_blockth_u.tu_block == block) |
| 388 | break; |
| 389 | /* re-synchronize with other side */ |
| 390 | j = synchnet(f); |
| 391 | if (j && trace) |
| 392 | printf("discarded %d packets\n", j); |
| 393 | if (dp->th_blockth_u.tu_block == (block - 1)) |
| 394 | continue; |
| 395 | } |
| 396 | error = 1; /* received packet does not match */ |
| 397 | } |
| 398 | |
| 399 | /* write data to file */ |
| 400 | size = writeit(file, &dp, n - 4, convert); |
| 401 | if (size < 0) { |
| 402 | nak(errno(*__errno()) + 100, (struct sockaddr *)&peer); |
| 403 | break; |
| 404 | } |
| 405 | amount += size; |
| 406 | } while (size == segment_size && !intrflag); |
| 407 | |
| 408 | abort: |
| 409 | /* ok to ack, since user has seen err msg */ |
| 410 | ap->th_opcode = htons((u_short)ACK)(__uint16_t)(__builtin_constant_p((u_short)04) ? (__uint16_t) (((__uint16_t)((u_short)04) & 0xffU) << 8 | ((__uint16_t )((u_short)04) & 0xff00U) >> 8) : __swap16md((u_short )04)); |
| 411 | ap->th_blockth_u.tu_block = htons(block)(__uint16_t)(__builtin_constant_p(block) ? (__uint16_t)(((__uint16_t )(block) & 0xffU) << 8 | ((__uint16_t)(block) & 0xff00U) >> 8) : __swap16md(block)); |
| 412 | (void)sendto(f, ackbuf, 4, 0, (struct sockaddr *)&peer, |
| 413 | peer.ss_len); |
| 414 | write_behind(file, convert); /* flush last buffer */ |
| 415 | |
| 416 | fclose(file); |
| 417 | stopclock(); |
| 418 | if (amount > 0) { |
| 419 | if (intrflag) |
| 420 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 421 | printstats("Received", amount); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | static int |
| 426 | cmpport(struct sockaddr *sa, struct sockaddr *sb) |
| 427 | { |
| 428 | char a[NI_MAXSERV32], b[NI_MAXSERV32]; |
| 429 | if (getnameinfo(sa, sa->sa_len, NULL((void*)0), 0, a, sizeof(a), NI_NUMERICSERV2)) |
| 430 | return (0); |
| 431 | if (getnameinfo(sb, sb->sa_len, NULL((void*)0), 0, b, sizeof(b), NI_NUMERICSERV2)) |
| 432 | return (0); |
| 433 | if (strcmp(a, b) != 0) |
| 434 | return (0); |
| 435 | |
| 436 | return (1); |
| 437 | } |
| 438 | |
| 439 | static int |
| 440 | makerequest(int request, const char *name, struct tftphdr *tp, |
| 441 | const char *mode) |
| 442 | { |
| 443 | char *cp; |
| 444 | int len, pktlen; |
| 445 | off_t fsize = 0; |
| 446 | struct stat st; |
| 447 | |
| 448 | tp->th_opcode = htons((u_short)request)(__uint16_t)(__builtin_constant_p((u_short)request) ? (__uint16_t )(((__uint16_t)((u_short)request) & 0xffU) << 8 | ( (__uint16_t)((u_short)request) & 0xff00U) >> 8) : __swap16md ((u_short)request)); |
| 449 | cp = tp->th_stuffth_u.tu_stuff; |
| 450 | pktlen = packet_size - offsetof(struct tftphdr, th_stuff)__builtin_offsetof(struct tftphdr, th_u.tu_stuff); |
| 451 | len = strlen(name) + 1; |
| 452 | strlcpy(cp, name, pktlen); |
| 453 | strlcpy(cp + len, mode, pktlen - len); |
| 454 | len += strlen(mode) + 1; |
| 455 | |
| 456 | if (opt_tsize) { |
| 457 | if (request == WRQ02) { |
| 458 | stat(name, &st); |
| 459 | fsize = st.st_size; |
| 460 | } |
| 461 | len += snprintf(cp + len, pktlen - len, "%s%c%lld%c", |
| 462 | options[OPT_TSIZE].o_type, 0, fsize, 0); |
| 463 | } |
| 464 | if (opt_tout) |
| 465 | len += snprintf(cp + len, pktlen - len, "%s%c%d%c", |
| 466 | options[OPT_TIMEOUT].o_type, 0, rexmtval, 0); |
| 467 | if (opt_blksize) |
| 468 | len += snprintf(cp + len, pktlen - len, "%s%c%d%c", |
| 469 | options[OPT_BLKSIZE].o_type, 0, opt_blksize, 0); |
| 470 | |
| 471 | return (cp + len - (char *)tp); |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * Send a nak packet (error message). |
| 476 | * Error code passed in is one of the |
| 477 | * standard TFTP codes, or a UNIX errno |
| 478 | * offset by 100. |
| 479 | */ |
| 480 | static void |
| 481 | nak(int error, struct sockaddr *peer) |
| 482 | { |
| 483 | struct errmsg *pe; |
| 484 | struct tftphdr *tp; |
| 485 | int length; |
| 486 | |
| 487 | tp = (struct tftphdr *)ackbuf; |
| 488 | tp->th_opcode = htons((u_short)ERROR)(__uint16_t)(__builtin_constant_p((u_short)05) ? (__uint16_t) (((__uint16_t)((u_short)05) & 0xffU) << 8 | ((__uint16_t )((u_short)05) & 0xff00U) >> 8) : __swap16md((u_short )05)); |
| 489 | tp->th_codeth_u.tu_code = htons((u_short)error)(__uint16_t)(__builtin_constant_p((u_short)error) ? (__uint16_t )(((__uint16_t)((u_short)error) & 0xffU) << 8 | ((__uint16_t )((u_short)error) & 0xff00U) >> 8) : __swap16md((u_short )error)); |
| 490 | for (pe = errmsgs; pe->e_code >= 0; pe++) |
| 491 | if (pe->e_code == error) |
| 492 | break; |
| 493 | if (pe->e_code < 0) { |
| 494 | pe->e_msg = strerror(error - 100); |
| 495 | tp->th_codeth_u.tu_code = EUNDEF0; |
| 496 | } |
| 497 | length = strlcpy(tp->th_msgth_data, pe->e_msg, packet_size) + 5; |
| 498 | if (length > packet_size) |
| 499 | length = packet_size; |
| 500 | if (trace) |
| 501 | tpacket("sent", tp, length); |
| 502 | if (sendto(f, ackbuf, length, 0, peer, |
| 503 | peer->sa_len) != length) |
| 504 | warn("nak"); |
| 505 | } |
| 506 | |
| 507 | static void |
| 508 | tpacket(const char *s, struct tftphdr *tp, int n) |
| 509 | { |
| 510 | char *cp, *file; |
| 511 | static char *opcodes[] = |
| 512 | { "#0", "RRQ", "WRQ", "DATA", "ACK", "ERROR", "OACK" }; |
| 513 | |
| 514 | u_short op = ntohs(tp->th_opcode)(__uint16_t)(__builtin_constant_p(tp->th_opcode) ? (__uint16_t )(((__uint16_t)(tp->th_opcode) & 0xffU) << 8 | ( (__uint16_t)(tp->th_opcode) & 0xff00U) >> 8) : __swap16md (tp->th_opcode)); |
| 515 | |
| 516 | if (op < RRQ01 || op > OACK06) |
| 517 | printf("%s opcode=%x ", s, op); |
| 518 | else |
| 519 | printf("%s %s ", s, opcodes[op]); |
| 520 | |
| 521 | switch (op) { |
| 522 | case RRQ01: |
| 523 | case WRQ02: |
| 524 | n -= 2; |
| 525 | file = cp = tp->th_stuffth_u.tu_stuff; |
| 526 | cp = strchr(cp, '\0'); |
| 527 | printf("<file=%s, mode=%s", file, cp + 1); |
| 528 | if (has_options) |
| 529 | oack(tp, n, 1); |
| 530 | printf(">\n"); |
| 531 | break; |
| 532 | case DATA03: |
| 533 | printf("<block=%d, %d bytes>\n", ntohs(tp->th_block)(__uint16_t)(__builtin_constant_p(tp->th_u.tu_block) ? (__uint16_t )(((__uint16_t)(tp->th_u.tu_block) & 0xffU) << 8 | ((__uint16_t)(tp->th_u.tu_block) & 0xff00U) >> 8) : __swap16md(tp->th_u.tu_block)), n - 4); |
| 534 | break; |
| 535 | case ACK04: |
| 536 | printf("<block=%d>\n", ntohs(tp->th_block)(__uint16_t)(__builtin_constant_p(tp->th_u.tu_block) ? (__uint16_t )(((__uint16_t)(tp->th_u.tu_block) & 0xffU) << 8 | ((__uint16_t)(tp->th_u.tu_block) & 0xff00U) >> 8) : __swap16md(tp->th_u.tu_block))); |
| 537 | break; |
| 538 | case ERROR05: |
| 539 | printf("<code=%d, msg=%s>\n", ntohs(tp->th_code)(__uint16_t)(__builtin_constant_p(tp->th_u.tu_code) ? (__uint16_t )(((__uint16_t)(tp->th_u.tu_code) & 0xffU) << 8 | ((__uint16_t)(tp->th_u.tu_code) & 0xff00U) >> 8 ) : __swap16md(tp->th_u.tu_code)), tp->th_msgth_data); |
| 540 | break; |
| 541 | case OACK06: |
| 542 | printf("<"); |
| 543 | oack(tp, n, 1); |
| 544 | printf(">\n"); |
| 545 | break; |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | static void |
| 550 | startclock(void) |
| 551 | { |
| 552 | clock_gettime(CLOCK_MONOTONIC3, &tstart); |
| 553 | } |
| 554 | |
| 555 | static void |
| 556 | stopclock(void) |
| 557 | { |
| 558 | clock_gettime(CLOCK_MONOTONIC3, &tstop); |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | printstats(const char *direction, unsigned long amount) |
| 563 | { |
| 564 | double delta; |
| 565 | |
| 566 | /* compute delta in 1/10's second units */ |
| 567 | delta = ((tstop.tv_sec * 10.) + (tstop.tv_nsec / 100000000)) - |
| 568 | ((tstart.tv_sec * 10.) + (tstart.tv_nsec / 100000000)); |
| 569 | delta = delta / 10.; /* back to seconds */ |
| 570 | printf("%s %lu bytes in %.1f seconds", direction, amount, delta); |
| 571 | if (verbose) |
| 572 | printf(" [%.0f bits/sec]", (amount * 8.) / delta); |
| 573 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 574 | } |
| 575 | |
| 576 | static void |
| 577 | printtimeout(void) |
| 578 | { |
| 579 | printf("Transfer timed out.\n"); |
| 580 | } |
| 581 | |
| 582 | static void |
| 583 | oack(struct tftphdr *tp, int size, int trace) |
| 584 | { |
| 585 | int i, len, off; |
| 586 | char *opt, *val; |
| 587 | |
| 588 | u_short op = ntohs(tp->th_opcode)(__uint16_t)(__builtin_constant_p(tp->th_opcode) ? (__uint16_t )(((__uint16_t)(tp->th_opcode) & 0xffU) << 8 | ( (__uint16_t)(tp->th_opcode) & 0xff00U) >> 8) : __swap16md (tp->th_opcode)); |
| 589 | |
| 590 | opt = tp->th_u.tu_stuff; |
| 591 | val = tp->th_u.tu_stuff; |
| 592 | |
| 593 | if (op == RRQ01 || op == WRQ02) { |
| 594 | len = strlen(opt) + 1; |
| 595 | opt = strchr(opt, '\0'); |
| 596 | opt++; |
| 597 | len += strlen(opt) + 1; |
| 598 | opt = strchr(opt, '\0'); |
| 599 | opt++; |
| 600 | val = opt; |
| 601 | off = len; |
| 602 | if (trace) |
| 603 | printf(", "); |
| 604 | } else |
| 605 | off = 2; |
| 606 | |
| 607 | for (i = off, len = 0; i < size - 1; i++) { |
Although the value stored to 'len' is used in the enclosing expression, the value is never actually read from 'len' | |
| 608 | if (*val != '\0') { |
| 609 | val++; |
| 610 | continue; |
| 611 | } |
| 612 | /* got option and value */ |
| 613 | val++; |
| 614 | if (trace) |
| 615 | printf("%s=%s", opt, val); |
| 616 | else |
| 617 | if (oack_set(opt, val) == -1) |
| 618 | break; |
| 619 | len = strlen(val) + 1; |
| 620 | val += len; |
| 621 | opt = val; |
| 622 | i += len; |
| 623 | if (trace && i < size - 1) |
| 624 | printf(", "); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | int |
| 629 | oack_set(const char *option, const char *value) |
| 630 | { |
| 631 | int i, n; |
| 632 | const char *errstr; |
| 633 | struct sockaddr_storage peer; |
| 634 | memcpy(&peer, &peeraddr, peeraddr.ss_len); |
| 635 | |
| 636 | for (i = 0; options[i].o_type != NULL((void*)0); i++) { |
| 637 | if (!strcasecmp(options[i].o_type, option)) { |
| 638 | if (i == OPT_TSIZE) { |
| 639 | /* XXX verify OACK response */ |
| 640 | } |
| 641 | if (i == OPT_TIMEOUT) { |
| 642 | /* verify OACK response */ |
| 643 | n = strtonum(value, TIMEOUT_MIN1, TIMEOUT_MAX255, |
| 644 | &errstr); |
| 645 | if (errstr || rexmtval != n || |
| 646 | opt_tout == 0) { |
| 647 | nak(EOPTNEG8, (struct sockaddr *)&peer); |
| 648 | intrflag = 1; |
| 649 | return (-1); |
| 650 | } |
| 651 | /* OK */ |
| 652 | } |
| 653 | if (i == OPT_BLKSIZE) { |
| 654 | /* verify OACK response */ |
| 655 | n = strtonum(value, SEGSIZE_MIN8, SEGSIZE_MAX65464, |
| 656 | &errstr); |
| 657 | if (errstr || opt_blksize != n || |
| 658 | opt_blksize == 0) { |
| 659 | nak(EOPTNEG8, (struct sockaddr *)&peer); |
| 660 | intrflag = 1; |
| 661 | return (-1); |
| 662 | } |
| 663 | /* OK, set option */ |
| 664 | segment_size = n; |
| 665 | packet_size = segment_size + 4; |
| 666 | } |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | return (1); |
| 671 | } |