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
36 static char sccsid[] = "@(#)tftp.c 8.1 (Berkeley) 6/6/93";
38 static const char rcsid[] =
39 "$FreeBSD: src/usr.bin/tftp/tftp.c,v 1.5.2.3 2002/05/14 22:08:07 bsd Exp $";
42 /* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
45 * TFTP User Program -- Protocol Machines
47 #include <sys/types.h>
48 #include <sys/socket.h>
51 #include <netinet/in.h>
53 #include <arpa/tftp.h>
67 extern struct sockaddr_storage peeraddr; /* filled in by main */
68 extern int f; /* the opened socket */
72 extern int maxtimeout;
73 extern volatile int txrx_error;
75 #define PKTSIZE SEGSIZE+4
81 static void nak __P((int, struct sockaddr *));
82 static int makerequest __P((int, const char *, struct tftphdr *, const char *));
83 static void printstats __P((const char *, unsigned long));
84 static void startclock __P((void));
85 static void stopclock __P((void));
86 static void timer __P((int));
87 static void tpacket __P((const char *, struct tftphdr *, int));
88 static int cmpport __P((struct sockaddr *, struct sockaddr *));
91 * Send the requested file.
94 xmitfile(fd, name, mode)
99 register struct tftphdr *ap; /* data and ack packets */
100 struct tftphdr *r_init(), *dp;
102 volatile unsigned short block;
103 volatile int size, convert;
104 volatile unsigned long amount;
105 struct sockaddr_storage from;
108 struct sockaddr_storage peer;
109 struct sockaddr_storage serv; /* valid server port number */
111 startclock(); /* start stat's clock */
112 dp = r_init(); /* reset fillbuf/read-ahead code */
113 ap = (struct tftphdr *)ackbuf;
114 file = fdopen(fd, "r");
115 convert = !strcmp(mode, "netascii");
118 memcpy(&peer, &peeraddr, peeraddr.ss_len);
119 memset(&serv, 0, sizeof(serv));
121 signal(SIGALRM, timer);
124 size = makerequest(WRQ, name, dp, mode) - 4;
126 /* size = read(fd, dp->th_data, SEGSIZE); */
127 size = readit(file, &dp, convert);
129 nak(errno + 100, (struct sockaddr *)&peer);
132 dp->th_opcode = htons((u_short)DATA);
133 dp->th_block = htons((u_short)block);
136 (void) setjmp(timeoutbuf);
139 tpacket("sent", dp, size + 4);
140 n = sendto(f, dp, size + 4, 0,
141 (struct sockaddr *)&peer, peer.ss_len);
146 read_ahead(file, convert);
150 fromlen = sizeof(from);
151 n = recvfrom(f, ackbuf, sizeof(ackbuf), 0,
152 (struct sockaddr *)&from, &fromlen);
161 else if (!cmpport((struct sockaddr *)&serv,
162 (struct sockaddr *)&from)) {
163 warn("server port mismatch");
168 tpacket("received", ap, n);
169 /* should verify packet came from server */
170 ap->th_opcode = ntohs(ap->th_opcode);
171 ap->th_block = ntohs(ap->th_block);
172 if (ap->th_opcode == ERROR) {
173 printf("Error code %d: %s\n", ap->th_code,
178 if (ap->th_opcode == ACK) {
181 if (ap->th_block == block) {
184 /* On an error, try to synchronize
189 printf("discarded %d packets\n",
192 if (ap->th_block == (block-1)) {
200 } while (size == SEGSIZE || block == 1);
205 printstats("Sent", amount);
212 recvfile(fd, name, mode)
217 register struct tftphdr *ap;
218 struct tftphdr *dp, *w_init();
220 volatile unsigned short block;
221 volatile int size, firsttrip;
222 volatile unsigned long amount;
223 struct sockaddr_storage from;
226 volatile int convert; /* true if converting crlf -> lf */
227 struct sockaddr_storage peer;
228 struct sockaddr_storage serv; /* valid server port number */
232 ap = (struct tftphdr *)ackbuf;
233 file = fdopen(fd, "w");
234 convert = !strcmp(mode, "netascii");
238 memcpy(&peer, &peeraddr, peeraddr.ss_len);
239 memset(&serv, 0, sizeof(serv));
241 signal(SIGALRM, timer);
244 size = makerequest(RRQ, name, ap, mode);
247 ap->th_opcode = htons((u_short)ACK);
248 ap->th_block = htons((u_short)(block));
253 (void) setjmp(timeoutbuf);
256 tpacket("sent", ap, size);
257 if (sendto(f, ackbuf, size, 0, (struct sockaddr *)&peer,
258 peer.ss_len) != size) {
263 write_behind(file, convert);
267 fromlen = sizeof(from);
268 n = recvfrom(f, dp, PKTSIZE, 0,
269 (struct sockaddr *)&from, &fromlen);
278 else if (!cmpport((struct sockaddr *)&serv,
279 (struct sockaddr *)&from)) {
280 warn("server port mismatch");
285 tpacket("received", dp, n);
286 /* should verify client address */
287 dp->th_opcode = ntohs(dp->th_opcode);
288 dp->th_block = ntohs(dp->th_block);
289 if (dp->th_opcode == ERROR) {
290 printf("Error code %d: %s\n", dp->th_code,
295 if (dp->th_opcode == DATA) {
298 if (dp->th_block == block) {
299 break; /* have next packet */
301 /* On an error, try to synchronize
306 printf("discarded %d packets\n", j);
308 if (dp->th_block == (block-1)) {
309 goto send_ack; /* resend ack */
313 /* size = write(fd, dp->th_data, n - 4); */
314 size = writeit(file, &dp, n - 4, convert);
316 nak(errno + 100, (struct sockaddr *)&peer);
320 } while (size == SEGSIZE);
321 abort: /* ok to ack, since user */
322 ap->th_opcode = htons((u_short)ACK); /* has seen err msg */
323 ap->th_block = htons((u_short)block);
324 (void) sendto(f, ackbuf, 4, 0, (struct sockaddr *)&peer,
326 write_behind(file, convert); /* flush last buffer */
330 printstats("Received", amount);
334 makerequest(request, name, tp, mode)
342 tp->th_opcode = htons((u_short)request);
350 return (cp - (char *)tp);
357 { EUNDEF, "Undefined error code" },
358 { ENOTFOUND, "File not found" },
359 { EACCESS, "Access violation" },
360 { ENOSPACE, "Disk full or allocation exceeded" },
361 { EBADOP, "Illegal TFTP operation" },
362 { EBADID, "Unknown transfer ID" },
363 { EEXISTS, "File already exists" },
364 { ENOUSER, "No such user" },
369 * Send a nak packet (error message).
370 * Error code passed in is one of the
371 * standard TFTP codes, or a UNIX errno
377 struct sockaddr *peer;
379 register struct errmsg *pe;
380 register struct tftphdr *tp;
384 tp = (struct tftphdr *)ackbuf;
385 tp->th_opcode = htons((u_short)ERROR);
386 tp->th_code = htons((u_short)error);
387 for (pe = errmsgs; pe->e_code >= 0; pe++)
388 if (pe->e_code == error)
390 if (pe->e_code < 0) {
391 pe->e_msg = strerror(error - 100);
392 tp->th_code = EUNDEF;
394 strcpy(tp->th_msg, pe->e_msg);
395 length = strlen(pe->e_msg) + 4;
397 tpacket("sent", tp, length);
398 if (sendto(f, ackbuf, length, 0, peer, peer->sa_len) != length)
408 static char *opcodes[] =
409 { "#0", "RRQ", "WRQ", "DATA", "ACK", "ERROR" };
410 register char *cp, *file;
411 u_short op = ntohs(tp->th_opcode);
414 if (op < RRQ || op > ERROR)
415 printf("%s opcode=%x ", s, op);
417 printf("%s %s ", s, opcodes[op]);
423 file = cp = tp->th_stuff;
424 cp = index(cp, '\0');
425 printf("<file=%s, mode=%s>\n", file, cp + 1);
429 printf("<block=%d, %d bytes>\n", ntohs(tp->th_block), n - 4);
433 printf("<block=%d>\n", ntohs(tp->th_block));
437 printf("<code=%d, msg=%s>\n", ntohs(tp->th_code), tp->th_msg);
442 struct timeval tstart;
443 struct timeval tstop;
449 (void)gettimeofday(&tstart, NULL);
456 (void)gettimeofday(&tstop, NULL);
460 printstats(direction, amount)
461 const char *direction;
462 unsigned long amount;
465 /* compute delta in 1/10's second units */
466 delta = ((tstop.tv_sec*10.)+(tstop.tv_usec/100000)) -
467 ((tstart.tv_sec*10.)+(tstart.tv_usec/100000));
468 delta = delta/10.; /* back to seconds */
469 printf("%s %d bytes in %.1f seconds", direction, amount, delta);
471 printf(" [%.0f bits/sec]", (amount*8.)/delta);
481 if (timeout >= maxtimeout) {
482 printf("Transfer timed out.\n");
483 longjmp(toplevel, -1);
486 longjmp(timeoutbuf, 1);
494 char a[NI_MAXSERV], b[NI_MAXSERV];
496 if (getnameinfo(sa, sa->sa_len, NULL, 0, a, sizeof(a), NI_NUMERICSERV))
498 if (getnameinfo(sb, sb->sa_len, NULL, 0, b, sizeof(b), NI_NUMERICSERV))
500 if (strcmp(a, b) != 0)