2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)tftp.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/tftp/tftp.c,v 1.5.2.3 2002/05/14 22:08:07 bsd Exp $
35 * $DragonFly: src/usr.bin/tftp/tftp.c,v 1.2 2003/06/17 04:29:32 dillon Exp $
38 /* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
41 * TFTP User Program -- Protocol Machines
43 #include <sys/types.h>
44 #include <sys/socket.h>
47 #include <netinet/in.h>
49 #include <arpa/tftp.h>
63 extern struct sockaddr_storage peeraddr; /* filled in by main */
64 extern int f; /* the opened socket */
68 extern int maxtimeout;
69 extern volatile int txrx_error;
71 #define PKTSIZE SEGSIZE+4
77 static void nak __P((int, struct sockaddr *));
78 static int makerequest __P((int, const char *, struct tftphdr *, const char *));
79 static void printstats __P((const char *, unsigned long));
80 static void startclock __P((void));
81 static void stopclock __P((void));
82 static void timer __P((int));
83 static void tpacket __P((const char *, struct tftphdr *, int));
84 static int cmpport __P((struct sockaddr *, struct sockaddr *));
87 * Send the requested file.
90 xmitfile(fd, name, mode)
95 register struct tftphdr *ap; /* data and ack packets */
96 struct tftphdr *r_init(), *dp;
98 volatile unsigned short block;
99 volatile int size, convert;
100 volatile unsigned long amount;
101 struct sockaddr_storage from;
104 struct sockaddr_storage peer;
105 struct sockaddr_storage serv; /* valid server port number */
107 startclock(); /* start stat's clock */
108 dp = r_init(); /* reset fillbuf/read-ahead code */
109 ap = (struct tftphdr *)ackbuf;
110 file = fdopen(fd, "r");
111 convert = !strcmp(mode, "netascii");
114 memcpy(&peer, &peeraddr, peeraddr.ss_len);
115 memset(&serv, 0, sizeof(serv));
117 signal(SIGALRM, timer);
120 size = makerequest(WRQ, name, dp, mode) - 4;
122 /* size = read(fd, dp->th_data, SEGSIZE); */
123 size = readit(file, &dp, convert);
125 nak(errno + 100, (struct sockaddr *)&peer);
128 dp->th_opcode = htons((u_short)DATA);
129 dp->th_block = htons((u_short)block);
132 (void) setjmp(timeoutbuf);
135 tpacket("sent", dp, size + 4);
136 n = sendto(f, dp, size + 4, 0,
137 (struct sockaddr *)&peer, peer.ss_len);
142 read_ahead(file, convert);
146 fromlen = sizeof(from);
147 n = recvfrom(f, ackbuf, sizeof(ackbuf), 0,
148 (struct sockaddr *)&from, &fromlen);
157 else if (!cmpport((struct sockaddr *)&serv,
158 (struct sockaddr *)&from)) {
159 warn("server port mismatch");
164 tpacket("received", ap, n);
165 /* should verify packet came from server */
166 ap->th_opcode = ntohs(ap->th_opcode);
167 ap->th_block = ntohs(ap->th_block);
168 if (ap->th_opcode == ERROR) {
169 printf("Error code %d: %s\n", ap->th_code,
174 if (ap->th_opcode == ACK) {
177 if (ap->th_block == block) {
180 /* On an error, try to synchronize
185 printf("discarded %d packets\n",
188 if (ap->th_block == (block-1)) {
196 } while (size == SEGSIZE || block == 1);
201 printstats("Sent", amount);
208 recvfile(fd, name, mode)
213 register struct tftphdr *ap;
214 struct tftphdr *dp, *w_init();
216 volatile unsigned short block;
217 volatile int size, firsttrip;
218 volatile unsigned long amount;
219 struct sockaddr_storage from;
222 volatile int convert; /* true if converting crlf -> lf */
223 struct sockaddr_storage peer;
224 struct sockaddr_storage serv; /* valid server port number */
228 ap = (struct tftphdr *)ackbuf;
229 file = fdopen(fd, "w");
230 convert = !strcmp(mode, "netascii");
234 memcpy(&peer, &peeraddr, peeraddr.ss_len);
235 memset(&serv, 0, sizeof(serv));
237 signal(SIGALRM, timer);
240 size = makerequest(RRQ, name, ap, mode);
243 ap->th_opcode = htons((u_short)ACK);
244 ap->th_block = htons((u_short)(block));
249 (void) setjmp(timeoutbuf);
252 tpacket("sent", ap, size);
253 if (sendto(f, ackbuf, size, 0, (struct sockaddr *)&peer,
254 peer.ss_len) != size) {
259 write_behind(file, convert);
263 fromlen = sizeof(from);
264 n = recvfrom(f, dp, PKTSIZE, 0,
265 (struct sockaddr *)&from, &fromlen);
274 else if (!cmpport((struct sockaddr *)&serv,
275 (struct sockaddr *)&from)) {
276 warn("server port mismatch");
281 tpacket("received", dp, n);
282 /* should verify client address */
283 dp->th_opcode = ntohs(dp->th_opcode);
284 dp->th_block = ntohs(dp->th_block);
285 if (dp->th_opcode == ERROR) {
286 printf("Error code %d: %s\n", dp->th_code,
291 if (dp->th_opcode == DATA) {
294 if (dp->th_block == block) {
295 break; /* have next packet */
297 /* On an error, try to synchronize
302 printf("discarded %d packets\n", j);
304 if (dp->th_block == (block-1)) {
305 goto send_ack; /* resend ack */
309 /* size = write(fd, dp->th_data, n - 4); */
310 size = writeit(file, &dp, n - 4, convert);
312 nak(errno + 100, (struct sockaddr *)&peer);
316 } while (size == SEGSIZE);
317 abort: /* ok to ack, since user */
318 ap->th_opcode = htons((u_short)ACK); /* has seen err msg */
319 ap->th_block = htons((u_short)block);
320 (void) sendto(f, ackbuf, 4, 0, (struct sockaddr *)&peer,
322 write_behind(file, convert); /* flush last buffer */
326 printstats("Received", amount);
330 makerequest(request, name, tp, mode)
338 tp->th_opcode = htons((u_short)request);
346 return (cp - (char *)tp);
353 { EUNDEF, "Undefined error code" },
354 { ENOTFOUND, "File not found" },
355 { EACCESS, "Access violation" },
356 { ENOSPACE, "Disk full or allocation exceeded" },
357 { EBADOP, "Illegal TFTP operation" },
358 { EBADID, "Unknown transfer ID" },
359 { EEXISTS, "File already exists" },
360 { ENOUSER, "No such user" },
365 * Send a nak packet (error message).
366 * Error code passed in is one of the
367 * standard TFTP codes, or a UNIX errno
373 struct sockaddr *peer;
375 register struct errmsg *pe;
376 register struct tftphdr *tp;
380 tp = (struct tftphdr *)ackbuf;
381 tp->th_opcode = htons((u_short)ERROR);
382 tp->th_code = htons((u_short)error);
383 for (pe = errmsgs; pe->e_code >= 0; pe++)
384 if (pe->e_code == error)
386 if (pe->e_code < 0) {
387 pe->e_msg = strerror(error - 100);
388 tp->th_code = EUNDEF;
390 strcpy(tp->th_msg, pe->e_msg);
391 length = strlen(pe->e_msg) + 4;
393 tpacket("sent", tp, length);
394 if (sendto(f, ackbuf, length, 0, peer, peer->sa_len) != length)
404 static char *opcodes[] =
405 { "#0", "RRQ", "WRQ", "DATA", "ACK", "ERROR" };
406 register char *cp, *file;
407 u_short op = ntohs(tp->th_opcode);
410 if (op < RRQ || op > ERROR)
411 printf("%s opcode=%x ", s, op);
413 printf("%s %s ", s, opcodes[op]);
419 file = cp = tp->th_stuff;
420 cp = index(cp, '\0');
421 printf("<file=%s, mode=%s>\n", file, cp + 1);
425 printf("<block=%d, %d bytes>\n", ntohs(tp->th_block), n - 4);
429 printf("<block=%d>\n", ntohs(tp->th_block));
433 printf("<code=%d, msg=%s>\n", ntohs(tp->th_code), tp->th_msg);
438 struct timeval tstart;
439 struct timeval tstop;
445 (void)gettimeofday(&tstart, NULL);
452 (void)gettimeofday(&tstop, NULL);
456 printstats(direction, amount)
457 const char *direction;
458 unsigned long amount;
461 /* compute delta in 1/10's second units */
462 delta = ((tstop.tv_sec*10.)+(tstop.tv_usec/100000)) -
463 ((tstart.tv_sec*10.)+(tstart.tv_usec/100000));
464 delta = delta/10.; /* back to seconds */
465 printf("%s %d bytes in %.1f seconds", direction, amount, delta);
467 printf(" [%.0f bits/sec]", (amount*8.)/delta);
477 if (timeout >= maxtimeout) {
478 printf("Transfer timed out.\n");
479 longjmp(toplevel, -1);
482 longjmp(timeoutbuf, 1);
490 char a[NI_MAXSERV], b[NI_MAXSERV];
492 if (getnameinfo(sa, sa->sa_len, NULL, 0, a, sizeof(a), NI_NUMERICSERV))
494 if (getnameinfo(sb, sb->sa_len, NULL, 0, b, sizeof(b), NI_NUMERICSERV))
496 if (strcmp(a, b) != 0)