1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
9 * Trivial file transfer protocol server.
11 * This code includes many modifications by Jim Guyton <guyton@rand-unix>
13 * This source file was started based on netkit-tftpd 0.17
14 * Heavily modified for curl's test suite
18 * Copyright (c) 1983 Regents of the University of California.
19 * All rights reserved.
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 * must display the following acknowledgement:
31 * This product includes software developed by the University of
32 * California, Berkeley and its contributors.
33 * 4. Neither the name of the University nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 #include "server_setup.h"
52 #ifdef HAVE_SYS_IOCTL_H
53 #include <sys/ioctl.h>
61 #ifdef HAVE_SYS_SOCKET_H
62 #include <sys/socket.h>
64 #ifdef HAVE_NETINET_IN_H
65 #include <netinet/in.h>
67 #ifdef HAVE_ARPA_INET_H
68 #include <arpa/inet.h>
70 #ifdef HAVE_ARPA_TFTP_H
71 #include <arpa/tftp.h>
78 #ifdef HAVE_SYS_FILIO_H
79 /* FIONREAD on Solaris 7 */
80 #include <sys/filio.h>
91 #define ENABLE_CURLX_PRINTF
92 /* make the curlx header define all printf() functions to use the curlx_*
94 #include "curlx.h" /* from the private lib dir */
97 #include "server_sockaddr.h"
99 /* include memdebug.h last */
100 #include "memdebug.h"
102 /*****************************************************************************
103 * STRUCT DECLARATIONS AND DEFINES *
104 *****************************************************************************/
107 #define PKTSIZE (SEGSIZE + 4) /* SEGSIZE defined in arpa/tftp.h */
111 char *buffer; /* holds the file data to send to the client */
112 size_t bufsize; /* size of the data in buffer */
113 char *rptr; /* read pointer into the buffer */
114 size_t rcount; /* amount of data left to read of the file */
115 long num; /* test case number */
116 int ofile; /* file descriptor for output file when uploading to us */
131 char storage[PKTSIZE];
135 * bf.counter values in range [-1 .. SEGSIZE] represents size of data in the
136 * bf.buf buffer. Additionally it can also hold flags BF_ALLOC or BF_FREE.
140 int counter; /* size of data in buffer, or flag */
141 tftphdr_storage_t buf; /* room for data packet */
144 #define BF_ALLOC -3 /* alloc'd but not yet filled */
145 #define BF_FREE -2 /* free */
149 #define opcode_DATA 3
151 #define opcode_ERROR 5
156 #define MIN(x,y) ((x)<(y)?(x):(y))
158 #ifndef DEFAULT_LOGFILE
159 #define DEFAULT_LOGFILE "log/tftpd.log"
162 #define REQUEST_DUMP "log/server.input"
164 #define DEFAULT_PORT 8999 /* UDP */
166 /*****************************************************************************
168 *****************************************************************************/
170 static struct errmsg errmsgs[] = {
171 { EUNDEF, "Undefined error code" },
172 { ENOTFOUND, "File not found" },
173 { EACCESS, "Access violation" },
174 { ENOSPACE, "Disk full or allocation exceeded" },
175 { EBADOP, "Illegal TFTP operation" },
176 { EBADID, "Unknown transfer ID" },
177 { EEXISTS, "File already exists" },
178 { ENOUSER, "No such user" },
182 static struct formats formata[] = {
188 static struct bf bfs[2];
190 static int nextone; /* index of next buffer to use */
191 static int current; /* index of buffer in use */
193 /* control flags for crlf conversions */
194 static int newline = 0; /* fillbuf: in middle of newline expansion */
195 static int prevchar = -1; /* putbuf: previous char (cr check) */
197 static tftphdr_storage_t buf;
198 static tftphdr_storage_t ackbuf;
200 static srvr_sockaddr_union_t from;
201 static curl_socklen_t fromlen;
203 static curl_socket_t peer = CURL_SOCKET_BAD;
206 static int maxtimeout = 5 * TIMEOUT;
208 static unsigned short sendblock; /* block count used by sendtftp() */
209 static struct tftphdr *sdp; /* data buffer used by sendtftp() */
210 static struct tftphdr *sap; /* ack buffer used by sendtftp() */
212 static unsigned short recvblock; /* block count used by recvtftp() */
213 static struct tftphdr *rdp; /* data buffer used by recvtftp() */
214 static struct tftphdr *rap; /* ack buffer used by recvtftp() */
217 static bool use_ipv6 = FALSE;
219 static const char *ipv_inuse = "IPv4";
221 const char *serverlogfile = DEFAULT_LOGFILE;
222 static char *pidname= (char *)".tftpd.pid";
223 static int serverlogslocked = 0;
224 static int wrotepidfile = 0;
226 #ifdef HAVE_SIGSETJMP
227 static sigjmp_buf timeoutbuf;
230 #if defined(HAVE_ALARM) && defined(SIGALRM)
231 static int rexmtval = TIMEOUT;
234 /* do-nothing macro replacement for systems which lack siginterrupt() */
236 #ifndef HAVE_SIGINTERRUPT
237 #define siginterrupt(x,y) do {} while(0)
240 /* vars used to keep around previous signal handlers */
242 typedef RETSIGTYPE (*SIGHANDLER_T)(int);
245 static SIGHANDLER_T old_sighup_handler = SIG_ERR;
249 static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
253 static SIGHANDLER_T old_sigint_handler = SIG_ERR;
257 static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
260 /* var which if set indicates that the program should finish execution */
262 SIG_ATOMIC_T got_exit_signal = 0;
264 /* if next is set indicates the first signal handled in exit_signal_handler */
266 static volatile int exit_signal = 0;
268 /*****************************************************************************
269 * FUNCTION PROTOTYPES *
270 *****************************************************************************/
272 static struct tftphdr *rw_init(int);
274 static struct tftphdr *w_init(void);
276 static struct tftphdr *r_init(void);
278 static int readit(struct testcase *test,
279 struct tftphdr **dpp,
282 static int writeit(struct testcase *test,
283 struct tftphdr **dpp,
287 static void read_ahead(struct testcase *test, int convert);
289 static ssize_t write_behind(struct testcase *test, int convert);
291 static int synchnet(curl_socket_t);
293 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size);
295 static int validate_access(struct testcase *test, const char *fname, int mode);
297 static void sendtftp(struct testcase *test, struct formats *pf);
299 static void recvtftp(struct testcase *test, struct formats *pf);
301 static void nak(int error);
303 #if defined(HAVE_ALARM) && defined(SIGALRM)
305 static void mysignal(int sig, void (*handler)(int));
307 static void timer(int signum);
309 static void justtimeout(int signum);
311 #endif /* HAVE_ALARM && SIGALRM */
313 static RETSIGTYPE exit_signal_handler(int signum);
315 static void install_signal_handlers(void);
317 static void restore_signal_handlers(void);
319 /*****************************************************************************
320 * FUNCTION IMPLEMENTATIONS *
321 *****************************************************************************/
323 #if defined(HAVE_ALARM) && defined(SIGALRM)
326 * Like signal(), but with well-defined semantics.
328 static void mysignal(int sig, void (*handler)(int))
331 memset(&sa, 0, sizeof(sa));
332 sa.sa_handler = handler;
333 sigaction(sig, &sa, NULL);
336 static void timer(int signum)
343 if(timeout >= maxtimeout) {
348 if(serverlogslocked) {
349 serverlogslocked = 0;
350 clear_advisor_read_lock(SERVERLOGS_LOCK);
354 #ifdef HAVE_SIGSETJMP
355 siglongjmp(timeoutbuf, 1);
359 static void justtimeout(int signum)
364 #endif /* HAVE_ALARM && SIGALRM */
366 /* signal handler that will be triggered to indicate that the program
367 should finish its execution in a controlled manner as soon as possible.
368 The first time this is called it will set got_exit_signal to one and
369 store in exit_signal the signal that triggered its execution. */
371 static RETSIGTYPE exit_signal_handler(int signum)
373 int old_errno = ERRNO;
374 if(got_exit_signal == 0) {
376 exit_signal = signum;
378 (void)signal(signum, exit_signal_handler);
379 SET_ERRNO(old_errno);
382 static void install_signal_handlers(void)
385 /* ignore SIGHUP signal */
386 if((old_sighup_handler = signal(SIGHUP, SIG_IGN)) == SIG_ERR)
387 logmsg("cannot install SIGHUP handler: %s", strerror(ERRNO));
390 /* ignore SIGPIPE signal */
391 if((old_sigpipe_handler = signal(SIGPIPE, SIG_IGN)) == SIG_ERR)
392 logmsg("cannot install SIGPIPE handler: %s", strerror(ERRNO));
395 /* handle SIGINT signal with our exit_signal_handler */
396 if((old_sigint_handler = signal(SIGINT, exit_signal_handler)) == SIG_ERR)
397 logmsg("cannot install SIGINT handler: %s", strerror(ERRNO));
399 siginterrupt(SIGINT, 1);
402 /* handle SIGTERM signal with our exit_signal_handler */
403 if((old_sigterm_handler = signal(SIGTERM, exit_signal_handler)) == SIG_ERR)
404 logmsg("cannot install SIGTERM handler: %s", strerror(ERRNO));
406 siginterrupt(SIGTERM, 1);
410 static void restore_signal_handlers(void)
413 if(SIG_ERR != old_sighup_handler)
414 (void)signal(SIGHUP, old_sighup_handler);
417 if(SIG_ERR != old_sigpipe_handler)
418 (void)signal(SIGPIPE, old_sigpipe_handler);
421 if(SIG_ERR != old_sigint_handler)
422 (void)signal(SIGINT, old_sigint_handler);
425 if(SIG_ERR != old_sigterm_handler)
426 (void)signal(SIGTERM, old_sigterm_handler);
431 * init for either read-ahead or write-behind.
432 * zero for write-behind, one for read-head.
434 static struct tftphdr *rw_init(int x)
436 newline = 0; /* init crlf flag */
438 bfs[0].counter = BF_ALLOC; /* pass out the first buffer */
440 bfs[1].counter = BF_FREE;
441 nextone = x; /* ahead or behind? */
442 return &bfs[0].buf.hdr;
445 static struct tftphdr *w_init(void)
447 return rw_init(0); /* write-behind */
450 static struct tftphdr *r_init(void)
452 return rw_init(1); /* read-ahead */
455 /* Have emptied current buffer by sending to net and getting ack.
456 Free it and return next buffer filled with data.
458 static int readit(struct testcase *test, struct tftphdr **dpp,
459 int convert /* if true, convert to ascii */)
463 bfs[current].counter = BF_FREE; /* free old one */
464 current = !current; /* "incr" current */
466 b = &bfs[current]; /* look at new buffer */
467 if (b->counter == BF_FREE) /* if it's empty */
468 read_ahead(test, convert); /* fill it */
470 *dpp = &b->buf.hdr; /* set caller's ptr */
475 * fill the input buffer, doing ascii conversions if requested
476 * conversions are lf -> cr,lf and cr -> cr, nul
478 static void read_ahead(struct testcase *test,
479 int convert /* if true, convert to ascii */)
487 b = &bfs[nextone]; /* look at "next" buffer */
488 if (b->counter != BF_FREE) /* nop if not free */
490 nextone = !nextone; /* "incr" next buffer ptr */
495 /* The former file reading code did this:
496 b->counter = read(fileno(file), dp->th_data, SEGSIZE); */
497 size_t copy_n = MIN(SEGSIZE, test->rcount);
498 memcpy(dp->th_data, test->rptr, copy_n);
500 /* decrease amount, advance pointer */
501 test->rcount -= copy_n;
502 test->rptr += copy_n;
503 b->counter = (int)copy_n;
508 for (i = 0 ; i < SEGSIZE; i++) {
510 if (prevchar == '\n')
511 c = '\n'; /* lf to cr,lf */
513 c = '\0'; /* cr to cr,nul */
524 if (c == '\n' || c == '\r') {
532 b->counter = (int)(p - dp->th_data);
535 /* Update count associated with the buffer, get new buffer from the queue.
536 Calls write_behind only if next buffer not available.
538 static int writeit(struct testcase *test, struct tftphdr **dpp,
541 bfs[current].counter = ct; /* set size of data to write */
542 current = !current; /* switch to other buffer */
543 if (bfs[current].counter != BF_FREE) /* if not free */
544 write_behind(test, convert); /* flush it */
545 bfs[current].counter = BF_ALLOC; /* mark as alloc'd */
546 *dpp = &bfs[current].buf.hdr;
547 return ct; /* this is a lie of course */
551 * Output a buffer to a file, converting from netascii if requested.
552 * CR,NUL -> CR and CR,LF => LF.
553 * Note spec is undefined if we get CR as last byte of file or a
554 * CR followed by anything else. In this case we leave it alone.
556 static ssize_t write_behind(struct testcase *test, int convert)
562 int c; /* current character */
567 if (b->counter < -1) /* anything to flush? */
568 return 0; /* just nop if nothing to do */
572 snprintf(outfile, sizeof(outfile), "log/upload.%ld", test->num);
573 test->ofile=open(outfile, O_CREAT|O_RDWR, 0777);
574 if(test->ofile == -1) {
575 logmsg("Couldn't create and/or open file %s for upload!", outfile);
576 return -1; /* failure! */
580 count = b->counter; /* remember byte count */
581 b->counter = BF_FREE; /* reset flag */
583 nextone = !nextone; /* incr for next time */
584 writebuf = dp->th_data;
587 return -1; /* nak logic? */
590 return write(test->ofile, writebuf, count);
594 while (ct--) { /* loop over the buffer */
595 c = *p++; /* pick up a character */
596 if (prevchar == '\r') { /* if prev char was cr */
597 if (c == '\n') /* if have cr,lf then just */
598 lseek(test->ofile, -1, SEEK_CUR); /* smash lf on top of the cr */
600 if (c == '\0') /* if have cr,nul then */
601 goto skipit; /* just skip over the putc */
602 /* else just fall through and allow it */
606 if(1 != write(test->ofile, &c, 1))
614 /* When an error has occurred, it is possible that the two sides are out of
615 * synch. Ie: that what I think is the other side's response to packet N is
616 * really their response to packet N-1.
618 * So, to try to prevent that, we flush all the input queued up for us on the
619 * network connection on our host.
621 * We return the number of packets we flushed (mostly for reporting when trace
625 static int synchnet(curl_socket_t f /* socket to flush */)
628 #if defined(HAVE_IOCTLSOCKET)
635 srvr_sockaddr_union_t fromaddr;
636 curl_socklen_t fromaddrlen;
639 #if defined(HAVE_IOCTLSOCKET)
640 (void) ioctlsocket(f, FIONREAD, &i);
642 (void) ioctl(f, FIONREAD, &i);
649 fromaddrlen = sizeof(fromaddr.sa4);
652 fromaddrlen = sizeof(fromaddr.sa6);
654 (void) recvfrom(f, rbuf, sizeof(rbuf), 0,
655 &fromaddr.sa, &fromaddrlen);
663 int main(int argc, char **argv)
665 srvr_sockaddr_union_t me;
669 unsigned short port = DEFAULT_PORT;
670 curl_socket_t sock = CURL_SOCKET_BAD;
675 struct testcase test;
678 memset(&test, 0, sizeof(test));
681 if(!strcmp("--version", argv[arg])) {
682 printf("tftpd IPv4%s\n",
691 else if(!strcmp("--pidfile", argv[arg])) {
694 pidname = argv[arg++];
696 else if(!strcmp("--logfile", argv[arg])) {
699 serverlogfile = argv[arg++];
701 else if(!strcmp("--ipv4", argv[arg])) {
708 else if(!strcmp("--ipv6", argv[arg])) {
715 else if(!strcmp("--port", argv[arg])) {
719 unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
720 if((endptr != argv[arg] + strlen(argv[arg])) ||
721 (ulnum < 1025UL) || (ulnum > 65535UL)) {
722 fprintf(stderr, "tftpd: invalid --port argument (%s)\n",
726 port = curlx_ultous(ulnum);
730 else if(!strcmp("--srcdir", argv[arg])) {
738 puts("Usage: tftpd [option]\n"
740 " --logfile [file]\n"
741 " --pidfile [file]\n"
752 atexit(win32_cleanup);
755 install_signal_handlers();
757 pid = (long)getpid();
762 sock = socket(AF_INET, SOCK_DGRAM, 0);
765 sock = socket(AF_INET6, SOCK_DGRAM, 0);
768 if(CURL_SOCKET_BAD == sock) {
770 logmsg("Error creating socket: (%d) %s",
771 error, strerror(error));
777 if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
778 (void *)&flag, sizeof(flag))) {
780 logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s",
781 error, strerror(error));
789 memset(&me.sa4, 0, sizeof(me.sa4));
790 me.sa4.sin_family = AF_INET;
791 me.sa4.sin_addr.s_addr = INADDR_ANY;
792 me.sa4.sin_port = htons(port);
793 rc = bind(sock, &me.sa, sizeof(me.sa4));
797 memset(&me.sa6, 0, sizeof(me.sa6));
798 me.sa6.sin6_family = AF_INET6;
799 me.sa6.sin6_addr = in6addr_any;
800 me.sa6.sin6_port = htons(port);
801 rc = bind(sock, &me.sa, sizeof(me.sa6));
803 #endif /* ENABLE_IPV6 */
806 logmsg("Error binding socket on port %hu: (%d) %s",
807 port, error, strerror(error));
812 wrotepidfile = write_pidfile(pidname);
818 logmsg("Running %s version on port UDP/%d", ipv_inuse, (int)port);
821 fromlen = sizeof(from);
825 fromlen = sizeof(from.sa4);
828 fromlen = sizeof(from.sa6);
830 n = (ssize_t)recvfrom(sock, &buf.storage[0], sizeof(buf.storage), 0,
840 set_advisor_read_lock(SERVERLOGS_LOCK);
841 serverlogslocked = 1;
846 from.sa4.sin_family = AF_INET;
847 peer = socket(AF_INET, SOCK_DGRAM, 0);
848 if(CURL_SOCKET_BAD == peer) {
853 if(connect(peer, &from.sa, sizeof(from.sa4)) < 0) {
854 logmsg("connect: fail");
861 from.sa6.sin6_family = AF_INET6;
862 peer = socket(AF_INET6, SOCK_DGRAM, 0);
863 if(CURL_SOCKET_BAD == peer) {
868 if (connect(peer, &from.sa, sizeof(from.sa6)) < 0) {
869 logmsg("connect: fail");
876 maxtimeout = 5*TIMEOUT;
879 tp->th_opcode = ntohs(tp->th_opcode);
880 if (tp->th_opcode == opcode_RRQ || tp->th_opcode == opcode_WRQ) {
881 memset(&test, 0, sizeof(test));
882 if (do_tftp(&test, tp, n) < 0)
888 peer = CURL_SOCKET_BAD;
898 if(serverlogslocked) {
899 serverlogslocked = 0;
900 clear_advisor_read_lock(SERVERLOGS_LOCK);
903 logmsg("end of one transfer");
912 if((peer != sock) && (peer != CURL_SOCKET_BAD))
915 if(sock != CURL_SOCKET_BAD)
919 logmsg("signalled to die");
924 if(serverlogslocked) {
925 serverlogslocked = 0;
926 clear_advisor_read_lock(SERVERLOGS_LOCK);
929 restore_signal_handlers();
931 if(got_exit_signal) {
932 logmsg("========> %s tftpd (port: %d pid: %ld) exits with signal (%d)",
933 ipv_inuse, (int)port, pid, exit_signal);
935 * To properly set the return status of the process we
936 * must raise the same signal SIGINT or SIGTERM that we
937 * caught and let the old handler take care of it.
942 logmsg("========> tftpd quits");
947 * Handle initial connection protocol.
949 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size)
952 int first = 1, ecode;
954 char *filename, *mode = NULL;
958 /* Open request dump file. */
959 server = fopen(REQUEST_DUMP, "ab");
962 logmsg("fopen() failed with error: %d %s", error, strerror(error));
963 logmsg("Error opening file: %s", REQUEST_DUMP);
967 /* store input protocol */
968 fprintf(server, "opcode: %x\n", tp->th_opcode);
970 cp = (char *)&tp->th_stuff;
973 while (cp < &buf.storage[size]) {
988 /* store input protocol */
989 fprintf(server, "filename: %s\n", filename);
991 for (cp = mode; cp && *cp; cp++)
993 *cp = (char)tolower((int)*cp);
995 /* store input protocol */
996 fprintf(server, "mode: %s\n", mode);
999 for (pf = formata; pf->f_mode; pf++)
1000 if (strcmp(pf->f_mode, mode) == 0)
1006 ecode = validate_access(test, filename, tp->th_opcode);
1011 if (tp->th_opcode == opcode_WRQ)
1020 * Validate file access.
1022 static int validate_access(struct testcase *test,
1023 const char *filename, int mode)
1026 long testno, partno;
1028 char partbuf[80]="data";
1030 logmsg("trying to get file: %s mode %x", filename, mode);
1032 if(!strncmp("verifiedserver", filename, 14)) {
1034 size_t count = sprintf(weare, "WE ROOLZ: %ld\r\n", (long)getpid());
1036 logmsg("Are-we-friendly question received");
1037 test->buffer = strdup(weare);
1038 test->rptr = test->buffer; /* set read pointer */
1039 test->bufsize = count; /* set total count */
1040 test->rcount = count; /* set data left to read */
1041 return 0; /* fine */
1044 /* find the last slash */
1045 ptr = strrchr(filename, '/');
1050 ptr++; /* skip the slash */
1052 /* skip all non-numericals following the slash */
1053 while(*ptr && !ISDIGIT(*ptr))
1056 /* get the number */
1057 testno = strtol(ptr, &ptr, 10);
1059 if(testno > 10000) {
1060 partno = testno % 10000;
1067 logmsg("requested test number %ld part %ld", testno, partno);
1071 file = test2file(testno);
1074 sprintf(partbuf, "data%ld", partno);
1077 FILE *stream=fopen(file, "rb");
1080 logmsg("fopen() failed with error: %d %s", error, strerror(error));
1081 logmsg("Error opening file: %s", file);
1082 logmsg("Couldn't open test file: %s", file);
1087 error = getpart(&test->buffer, &count, "reply", partbuf, stream);
1090 logmsg("getpart() failed with error: %d", error);
1094 test->rptr = test->buffer; /* set read pointer */
1095 test->bufsize = count; /* set total count */
1096 test->rcount = count; /* set data left to read */
1107 logmsg("no slash found in path");
1108 return EACCESS; /* failure */
1111 logmsg("file opened and all is good");
1116 * Send the requested file.
1118 static void sendtftp(struct testcase *test, struct formats *pf)
1123 #if defined(HAVE_ALARM) && defined(SIGALRM)
1124 mysignal(SIGALRM, timer);
1129 size = readit(test, &sdp, pf->f_convert);
1134 sdp->th_opcode = htons((unsigned short)opcode_DATA);
1135 sdp->th_block = htons(sendblock);
1137 #ifdef HAVE_SIGSETJMP
1138 (void) sigsetjmp(timeoutbuf, 1);
1141 if (swrite(peer, sdp, size + 4) != size + 4) {
1145 read_ahead(test, pf->f_convert);
1148 alarm(rexmtval); /* read the ack */
1150 n = sread(peer, &ackbuf.storage[0], sizeof(ackbuf.storage));
1157 logmsg("read: fail");
1160 sap->th_opcode = ntohs((unsigned short)sap->th_opcode);
1161 sap->th_block = ntohs(sap->th_block);
1163 if (sap->th_opcode == opcode_ERROR) {
1164 logmsg("got ERROR");
1168 if (sap->th_opcode == opcode_ACK) {
1169 if (sap->th_block == sendblock) {
1172 /* Re-synchronize with the other side */
1173 (void) synchnet(peer);
1174 if (sap->th_block == (sendblock-1)) {
1181 } while (size == SEGSIZE);
1187 static void recvtftp(struct testcase *test, struct formats *pf)
1191 #if defined(HAVE_ALARM) && defined(SIGALRM)
1192 mysignal(SIGALRM, timer);
1198 rap->th_opcode = htons((unsigned short)opcode_ACK);
1199 rap->th_block = htons(recvblock);
1201 #ifdef HAVE_SIGSETJMP
1202 (void) sigsetjmp(timeoutbuf, 1);
1205 if (swrite(peer, &ackbuf.storage[0], 4) != 4) {
1206 logmsg("write: fail\n");
1209 write_behind(test, pf->f_convert);
1214 n = sread(peer, rdp, PKTSIZE);
1220 if (n < 0) { /* really? */
1221 logmsg("read: fail\n");
1224 rdp->th_opcode = ntohs((unsigned short)rdp->th_opcode);
1225 rdp->th_block = ntohs(rdp->th_block);
1226 if (rdp->th_opcode == opcode_ERROR)
1228 if (rdp->th_opcode == opcode_DATA) {
1229 if (rdp->th_block == recvblock) {
1232 /* Re-synchronize with the other side */
1233 (void) synchnet(peer);
1234 if (rdp->th_block == (recvblock-1))
1235 goto send_ack; /* rexmit */
1239 size = writeit(test, &rdp, (int)(n - 4), pf->f_convert);
1240 if (size != (n-4)) { /* ahem */
1247 } while (size == SEGSIZE);
1248 write_behind(test, pf->f_convert);
1250 rap->th_opcode = htons((unsigned short)opcode_ACK); /* send the "final" ack */
1251 rap->th_block = htons(recvblock);
1252 (void) swrite(peer, &ackbuf.storage[0], 4);
1253 #if defined(HAVE_ALARM) && defined(SIGALRM)
1254 mysignal(SIGALRM, justtimeout); /* just abort read on timeout */
1257 /* normally times out and quits */
1258 n = sread(peer, &buf.storage[0], sizeof(buf.storage));
1264 if (n >= 4 && /* if read some data */
1265 rdp->th_opcode == opcode_DATA && /* and got a data block */
1266 recvblock == rdp->th_block) { /* then my last ack was lost */
1267 (void) swrite(peer, &ackbuf.storage[0], 4); /* resend final ack */
1274 * Send a nak packet (error message). Error code passed in is one of the
1275 * standard TFTP codes, or a UNIX errno offset by 100.
1277 static void nak(int error)
1284 tp->th_opcode = htons((unsigned short)opcode_ERROR);
1285 tp->th_code = htons((unsigned short)error);
1286 for (pe = errmsgs; pe->e_code >= 0; pe++)
1287 if (pe->e_code == error)
1289 if (pe->e_code < 0) {
1290 pe->e_msg = strerror(error - 100);
1291 tp->th_code = EUNDEF; /* set 'undef' errorcode */
1293 length = (int)strlen(pe->e_msg);
1295 /* we use memcpy() instead of strcpy() in order to avoid buffer overflow
1296 * report from glibc with FORTIFY_SOURCE */
1297 memcpy(tp->th_msg, pe->e_msg, length + 1);
1299 if (swrite(peer, &buf.storage[0], length) != length)
1300 logmsg("nak: fail\n");