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 #define CURL_NO_OLDIES
52 #include "setup.h" /* portability help from the lib directory */
54 #ifdef HAVE_SYS_IOCTL_H
55 #include <sys/ioctl.h>
63 #ifdef HAVE_SYS_SOCKET_H
64 #include <sys/socket.h>
66 #ifdef HAVE_NETINET_IN_H
67 #include <netinet/in.h>
69 #ifdef HAVE_ARPA_INET_H
70 #include <arpa/inet.h>
72 #ifdef HAVE_ARPA_TFTP_H
73 #include <arpa/tftp.h>
80 #ifdef HAVE_SYS_FILIO_H
81 /* FIONREAD on Solaris 7 */
82 #include <sys/filio.h>
93 #define ENABLE_CURLX_PRINTF
94 /* make the curlx header define all printf() functions to use the curlx_*
96 #include "curlx.h" /* from the private lib dir */
99 #include "server_sockaddr.h"
101 /* include memdebug.h last */
102 #include "memdebug.h"
104 /*****************************************************************************
105 * STRUCT DECLARATIONS AND DEFINES *
106 *****************************************************************************/
109 #define PKTSIZE (SEGSIZE + 4) /* SEGSIZE defined in arpa/tftp.h */
113 char *buffer; /* holds the file data to send to the client */
114 size_t bufsize; /* size of the data in buffer */
115 char *rptr; /* read pointer into the buffer */
116 size_t rcount; /* amount of data left to read of the file */
117 long num; /* test case number */
118 int ofile; /* file descriptor for output file when uploading to us */
133 char storage[PKTSIZE];
137 * bf.counter values in range [-1 .. SEGSIZE] represents size of data in the
138 * bf.buf buffer. Additionally it can also hold flags BF_ALLOC or BF_FREE.
142 int counter; /* size of data in buffer, or flag */
143 tftphdr_storage_t buf; /* room for data packet */
146 #define BF_ALLOC -3 /* alloc'd but not yet filled */
147 #define BF_FREE -2 /* free */
151 #define opcode_DATA 3
153 #define opcode_ERROR 5
158 #define MIN(x,y) ((x)<(y)?(x):(y))
160 #ifndef DEFAULT_LOGFILE
161 #define DEFAULT_LOGFILE "log/tftpd.log"
164 #define REQUEST_DUMP "log/server.input"
166 #define DEFAULT_PORT 8999 /* UDP */
168 /*****************************************************************************
170 *****************************************************************************/
172 static struct errmsg errmsgs[] = {
173 { EUNDEF, "Undefined error code" },
174 { ENOTFOUND, "File not found" },
175 { EACCESS, "Access violation" },
176 { ENOSPACE, "Disk full or allocation exceeded" },
177 { EBADOP, "Illegal TFTP operation" },
178 { EBADID, "Unknown transfer ID" },
179 { EEXISTS, "File already exists" },
180 { ENOUSER, "No such user" },
184 static struct formats formata[] = {
190 static struct bf bfs[2];
192 static int nextone; /* index of next buffer to use */
193 static int current; /* index of buffer in use */
195 /* control flags for crlf conversions */
196 static int newline = 0; /* fillbuf: in middle of newline expansion */
197 static int prevchar = -1; /* putbuf: previous char (cr check) */
199 static tftphdr_storage_t buf;
200 static tftphdr_storage_t ackbuf;
202 static srvr_sockaddr_union_t from;
203 static curl_socklen_t fromlen;
205 static curl_socket_t peer = CURL_SOCKET_BAD;
208 static int maxtimeout = 5 * TIMEOUT;
210 static unsigned short sendblock; /* block count used by sendtftp() */
211 static struct tftphdr *sdp; /* data buffer used by sendtftp() */
212 static struct tftphdr *sap; /* ack buffer used by sendtftp() */
214 static unsigned short recvblock; /* block count used by recvtftp() */
215 static struct tftphdr *rdp; /* data buffer used by recvtftp() */
216 static struct tftphdr *rap; /* ack buffer used by recvtftp() */
219 static bool use_ipv6 = FALSE;
221 static const char *ipv_inuse = "IPv4";
223 const char *serverlogfile = DEFAULT_LOGFILE;
224 static char *pidname= (char *)".tftpd.pid";
225 static int serverlogslocked = 0;
226 static int wrotepidfile = 0;
228 #ifdef HAVE_SIGSETJMP
229 static sigjmp_buf timeoutbuf;
232 #if defined(HAVE_ALARM) && defined(SIGALRM)
233 static int rexmtval = TIMEOUT;
236 /* do-nothing macro replacement for systems which lack siginterrupt() */
238 #ifndef HAVE_SIGINTERRUPT
239 #define siginterrupt(x,y) do {} while(0)
242 /* vars used to keep around previous signal handlers */
244 typedef RETSIGTYPE (*SIGHANDLER_T)(int);
247 static SIGHANDLER_T old_sighup_handler = SIG_ERR;
251 static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
255 static SIGHANDLER_T old_sigint_handler = SIG_ERR;
259 static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
262 /* var which if set indicates that the program should finish execution */
264 SIG_ATOMIC_T got_exit_signal = 0;
266 /* if next is set indicates the first signal handled in exit_signal_handler */
268 static volatile int exit_signal = 0;
270 /*****************************************************************************
271 * FUNCTION PROTOTYPES *
272 *****************************************************************************/
274 static struct tftphdr *rw_init(int);
276 static struct tftphdr *w_init(void);
278 static struct tftphdr *r_init(void);
280 static int readit(struct testcase *test,
281 struct tftphdr **dpp,
284 static int writeit(struct testcase *test,
285 struct tftphdr **dpp,
289 static void read_ahead(struct testcase *test, int convert);
291 static ssize_t write_behind(struct testcase *test, int convert);
293 static int synchnet(curl_socket_t);
295 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size);
297 static int validate_access(struct testcase *test, const char *fname, int mode);
299 static void sendtftp(struct testcase *test, struct formats *pf);
301 static void recvtftp(struct testcase *test, struct formats *pf);
303 static void nak(int error);
305 #if defined(HAVE_ALARM) && defined(SIGALRM)
307 static void mysignal(int sig, void (*handler)(int));
309 static void timer(int signum);
311 static void justtimeout(int signum);
313 #endif /* HAVE_ALARM && SIGALRM */
315 static RETSIGTYPE exit_signal_handler(int signum);
317 static void install_signal_handlers(void);
319 static void restore_signal_handlers(void);
321 /*****************************************************************************
322 * FUNCTION IMPLEMENTATIONS *
323 *****************************************************************************/
325 #if defined(HAVE_ALARM) && defined(SIGALRM)
328 * Like signal(), but with well-defined semantics.
330 static void mysignal(int sig, void (*handler)(int))
333 memset(&sa, 0, sizeof(sa));
334 sa.sa_handler = handler;
335 sigaction(sig, &sa, NULL);
338 static void timer(int signum)
345 if(timeout >= maxtimeout) {
350 if(serverlogslocked) {
351 serverlogslocked = 0;
352 clear_advisor_read_lock(SERVERLOGS_LOCK);
356 #ifdef HAVE_SIGSETJMP
357 siglongjmp(timeoutbuf, 1);
361 static void justtimeout(int signum)
366 #endif /* HAVE_ALARM && SIGALRM */
368 /* signal handler that will be triggered to indicate that the program
369 should finish its execution in a controlled manner as soon as possible.
370 The first time this is called it will set got_exit_signal to one and
371 store in exit_signal the signal that triggered its execution. */
373 static RETSIGTYPE exit_signal_handler(int signum)
375 int old_errno = ERRNO;
376 if(got_exit_signal == 0) {
378 exit_signal = signum;
380 (void)signal(signum, exit_signal_handler);
381 SET_ERRNO(old_errno);
384 static void install_signal_handlers(void)
387 /* ignore SIGHUP signal */
388 if((old_sighup_handler = signal(SIGHUP, SIG_IGN)) == SIG_ERR)
389 logmsg("cannot install SIGHUP handler: %s", strerror(ERRNO));
392 /* ignore SIGPIPE signal */
393 if((old_sigpipe_handler = signal(SIGPIPE, SIG_IGN)) == SIG_ERR)
394 logmsg("cannot install SIGPIPE handler: %s", strerror(ERRNO));
397 /* handle SIGINT signal with our exit_signal_handler */
398 if((old_sigint_handler = signal(SIGINT, exit_signal_handler)) == SIG_ERR)
399 logmsg("cannot install SIGINT handler: %s", strerror(ERRNO));
401 siginterrupt(SIGINT, 1);
404 /* handle SIGTERM signal with our exit_signal_handler */
405 if((old_sigterm_handler = signal(SIGTERM, exit_signal_handler)) == SIG_ERR)
406 logmsg("cannot install SIGTERM handler: %s", strerror(ERRNO));
408 siginterrupt(SIGTERM, 1);
412 static void restore_signal_handlers(void)
415 if(SIG_ERR != old_sighup_handler)
416 (void)signal(SIGHUP, old_sighup_handler);
419 if(SIG_ERR != old_sigpipe_handler)
420 (void)signal(SIGPIPE, old_sigpipe_handler);
423 if(SIG_ERR != old_sigint_handler)
424 (void)signal(SIGINT, old_sigint_handler);
427 if(SIG_ERR != old_sigterm_handler)
428 (void)signal(SIGTERM, old_sigterm_handler);
433 * init for either read-ahead or write-behind.
434 * zero for write-behind, one for read-head.
436 static struct tftphdr *rw_init(int x)
438 newline = 0; /* init crlf flag */
440 bfs[0].counter = BF_ALLOC; /* pass out the first buffer */
442 bfs[1].counter = BF_FREE;
443 nextone = x; /* ahead or behind? */
444 return &bfs[0].buf.hdr;
447 static struct tftphdr *w_init(void)
449 return rw_init(0); /* write-behind */
452 static struct tftphdr *r_init(void)
454 return rw_init(1); /* read-ahead */
457 /* Have emptied current buffer by sending to net and getting ack.
458 Free it and return next buffer filled with data.
460 static int readit(struct testcase *test, struct tftphdr **dpp,
461 int convert /* if true, convert to ascii */)
465 bfs[current].counter = BF_FREE; /* free old one */
466 current = !current; /* "incr" current */
468 b = &bfs[current]; /* look at new buffer */
469 if (b->counter == BF_FREE) /* if it's empty */
470 read_ahead(test, convert); /* fill it */
472 *dpp = &b->buf.hdr; /* set caller's ptr */
477 * fill the input buffer, doing ascii conversions if requested
478 * conversions are lf -> cr,lf and cr -> cr, nul
480 static void read_ahead(struct testcase *test,
481 int convert /* if true, convert to ascii */)
489 b = &bfs[nextone]; /* look at "next" buffer */
490 if (b->counter != BF_FREE) /* nop if not free */
492 nextone = !nextone; /* "incr" next buffer ptr */
497 /* The former file reading code did this:
498 b->counter = read(fileno(file), dp->th_data, SEGSIZE); */
499 size_t copy_n = MIN(SEGSIZE, test->rcount);
500 memcpy(dp->th_data, test->rptr, copy_n);
502 /* decrease amount, advance pointer */
503 test->rcount -= copy_n;
504 test->rptr += copy_n;
505 b->counter = (int)copy_n;
510 for (i = 0 ; i < SEGSIZE; i++) {
512 if (prevchar == '\n')
513 c = '\n'; /* lf to cr,lf */
515 c = '\0'; /* cr to cr,nul */
526 if (c == '\n' || c == '\r') {
534 b->counter = (int)(p - dp->th_data);
537 /* Update count associated with the buffer, get new buffer from the queue.
538 Calls write_behind only if next buffer not available.
540 static int writeit(struct testcase *test, struct tftphdr **dpp,
543 bfs[current].counter = ct; /* set size of data to write */
544 current = !current; /* switch to other buffer */
545 if (bfs[current].counter != BF_FREE) /* if not free */
546 write_behind(test, convert); /* flush it */
547 bfs[current].counter = BF_ALLOC; /* mark as alloc'd */
548 *dpp = &bfs[current].buf.hdr;
549 return ct; /* this is a lie of course */
553 * Output a buffer to a file, converting from netascii if requested.
554 * CR,NUL -> CR and CR,LF => LF.
555 * Note spec is undefined if we get CR as last byte of file or a
556 * CR followed by anything else. In this case we leave it alone.
558 static ssize_t write_behind(struct testcase *test, int convert)
564 int c; /* current character */
569 if (b->counter < -1) /* anything to flush? */
570 return 0; /* just nop if nothing to do */
574 snprintf(outfile, sizeof(outfile), "log/upload.%ld", test->num);
575 test->ofile=open(outfile, O_CREAT|O_RDWR, 0777);
576 if(test->ofile == -1) {
577 logmsg("Couldn't create and/or open file %s for upload!", outfile);
578 return -1; /* failure! */
582 count = b->counter; /* remember byte count */
583 b->counter = BF_FREE; /* reset flag */
585 nextone = !nextone; /* incr for next time */
586 writebuf = dp->th_data;
589 return -1; /* nak logic? */
592 return write(test->ofile, writebuf, count);
596 while (ct--) { /* loop over the buffer */
597 c = *p++; /* pick up a character */
598 if (prevchar == '\r') { /* if prev char was cr */
599 if (c == '\n') /* if have cr,lf then just */
600 lseek(test->ofile, -1, SEEK_CUR); /* smash lf on top of the cr */
602 if (c == '\0') /* if have cr,nul then */
603 goto skipit; /* just skip over the putc */
604 /* else just fall through and allow it */
608 write(test->ofile, &c, 1);
615 /* When an error has occurred, it is possible that the two sides are out of
616 * synch. Ie: that what I think is the other side's response to packet N is
617 * really their response to packet N-1.
619 * So, to try to prevent that, we flush all the input queued up for us on the
620 * network connection on our host.
622 * We return the number of packets we flushed (mostly for reporting when trace
626 static int synchnet(curl_socket_t f /* socket to flush */)
629 #if defined(HAVE_IOCTLSOCKET)
636 srvr_sockaddr_union_t fromaddr;
637 curl_socklen_t fromaddrlen;
640 #if defined(HAVE_IOCTLSOCKET)
641 (void) ioctlsocket(f, FIONREAD, &i);
643 (void) ioctl(f, FIONREAD, &i);
650 fromaddrlen = sizeof(fromaddr.sa4);
653 fromaddrlen = sizeof(fromaddr.sa6);
655 (void) recvfrom(f, rbuf, sizeof(rbuf), 0,
656 &fromaddr.sa, &fromaddrlen);
664 int main(int argc, char **argv)
666 srvr_sockaddr_union_t me;
670 unsigned short port = DEFAULT_PORT;
671 curl_socket_t sock = CURL_SOCKET_BAD;
676 struct testcase test;
679 memset(&test, 0, sizeof(test));
682 if(!strcmp("--version", argv[arg])) {
683 printf("tftpd IPv4%s\n",
692 else if(!strcmp("--pidfile", argv[arg])) {
695 pidname = argv[arg++];
697 else if(!strcmp("--logfile", argv[arg])) {
700 serverlogfile = argv[arg++];
702 else if(!strcmp("--ipv4", argv[arg])) {
709 else if(!strcmp("--ipv6", argv[arg])) {
716 else if(!strcmp("--port", argv[arg])) {
720 unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
721 if((endptr != argv[arg] + strlen(argv[arg])) ||
722 (ulnum < 1025UL) || (ulnum > 65535UL)) {
723 fprintf(stderr, "tftpd: invalid --port argument (%s)\n",
727 port = curlx_ultous(ulnum);
731 else if(!strcmp("--srcdir", argv[arg])) {
739 puts("Usage: tftpd [option]\n"
741 " --logfile [file]\n"
742 " --pidfile [file]\n"
753 atexit(win32_cleanup);
756 install_signal_handlers();
758 pid = (long)getpid();
763 sock = socket(AF_INET, SOCK_DGRAM, 0);
766 sock = socket(AF_INET6, SOCK_DGRAM, 0);
769 if(CURL_SOCKET_BAD == sock) {
771 logmsg("Error creating socket: (%d) %s",
772 error, strerror(error));
778 if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
779 (void *)&flag, sizeof(flag))) {
781 logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s",
782 error, strerror(error));
790 memset(&me.sa4, 0, sizeof(me.sa4));
791 me.sa4.sin_family = AF_INET;
792 me.sa4.sin_addr.s_addr = INADDR_ANY;
793 me.sa4.sin_port = htons(port);
794 rc = bind(sock, &me.sa, sizeof(me.sa4));
798 memset(&me.sa6, 0, sizeof(me.sa6));
799 me.sa6.sin6_family = AF_INET6;
800 me.sa6.sin6_addr = in6addr_any;
801 me.sa6.sin6_port = htons(port);
802 rc = bind(sock, &me.sa, sizeof(me.sa6));
804 #endif /* ENABLE_IPV6 */
807 logmsg("Error binding socket on port %hu: (%d) %s",
808 port, error, strerror(error));
813 wrotepidfile = write_pidfile(pidname);
819 logmsg("Running %s version on port UDP/%d", ipv_inuse, (int)port);
822 fromlen = sizeof(from);
826 fromlen = sizeof(from.sa4);
829 fromlen = sizeof(from.sa6);
831 n = (ssize_t)recvfrom(sock, &buf.storage[0], sizeof(buf.storage), 0,
841 set_advisor_read_lock(SERVERLOGS_LOCK);
842 serverlogslocked = 1;
847 from.sa4.sin_family = AF_INET;
848 peer = socket(AF_INET, SOCK_DGRAM, 0);
849 if(CURL_SOCKET_BAD == peer) {
854 if(connect(peer, &from.sa, sizeof(from.sa4)) < 0) {
855 logmsg("connect: fail");
862 from.sa6.sin6_family = AF_INET6;
863 peer = socket(AF_INET6, SOCK_DGRAM, 0);
864 if(CURL_SOCKET_BAD == peer) {
869 if (connect(peer, &from.sa, sizeof(from.sa6)) < 0) {
870 logmsg("connect: fail");
877 maxtimeout = 5*TIMEOUT;
880 tp->th_opcode = ntohs(tp->th_opcode);
881 if (tp->th_opcode == opcode_RRQ || tp->th_opcode == opcode_WRQ) {
882 memset(&test, 0, sizeof(test));
883 if (do_tftp(&test, tp, n) < 0)
889 peer = CURL_SOCKET_BAD;
899 if(serverlogslocked) {
900 serverlogslocked = 0;
901 clear_advisor_read_lock(SERVERLOGS_LOCK);
904 logmsg("end of one transfer");
913 if((peer != sock) && (peer != CURL_SOCKET_BAD))
916 if(sock != CURL_SOCKET_BAD)
920 logmsg("signalled to die");
925 if(serverlogslocked) {
926 serverlogslocked = 0;
927 clear_advisor_read_lock(SERVERLOGS_LOCK);
930 restore_signal_handlers();
932 if(got_exit_signal) {
933 logmsg("========> %s tftpd (port: %d pid: %ld) exits with signal (%d)",
934 ipv_inuse, (int)port, pid, exit_signal);
936 * To properly set the return status of the process we
937 * must raise the same signal SIGINT or SIGTERM that we
938 * caught and let the old handler take care of it.
943 logmsg("========> tftpd quits");
948 * Handle initial connection protocol.
950 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size)
953 int first = 1, ecode;
955 char *filename, *mode = NULL;
959 /* Open request dump file. */
960 server = fopen(REQUEST_DUMP, "ab");
963 logmsg("fopen() failed with error: %d %s", error, strerror(error));
964 logmsg("Error opening file: %s", REQUEST_DUMP);
968 /* store input protocol */
969 fprintf(server, "opcode: %x\n", tp->th_opcode);
971 cp = (char *)&tp->th_stuff;
974 while (cp < &buf.storage[size]) {
989 /* store input protocol */
990 fprintf(server, "filename: %s\n", filename);
992 for (cp = mode; cp && *cp; cp++)
994 *cp = (char)tolower((int)*cp);
996 /* store input protocol */
997 fprintf(server, "mode: %s\n", mode);
1000 for (pf = formata; pf->f_mode; pf++)
1001 if (strcmp(pf->f_mode, mode) == 0)
1007 ecode = validate_access(test, filename, tp->th_opcode);
1012 if (tp->th_opcode == opcode_WRQ)
1021 * Validate file access.
1023 static int validate_access(struct testcase *test,
1024 const char *filename, int mode)
1027 long testno, partno;
1029 char partbuf[80]="data";
1031 logmsg("trying to get file: %s mode %x", filename, mode);
1033 if(!strncmp("verifiedserver", filename, 14)) {
1035 size_t count = sprintf(weare, "WE ROOLZ: %ld\r\n", (long)getpid());
1037 logmsg("Are-we-friendly question received");
1038 test->buffer = strdup(weare);
1039 test->rptr = test->buffer; /* set read pointer */
1040 test->bufsize = count; /* set total count */
1041 test->rcount = count; /* set data left to read */
1042 return 0; /* fine */
1045 /* find the last slash */
1046 ptr = strrchr(filename, '/');
1051 ptr++; /* skip the slash */
1053 /* skip all non-numericals following the slash */
1054 while(*ptr && !ISDIGIT(*ptr))
1057 /* get the number */
1058 testno = strtol(ptr, &ptr, 10);
1060 if(testno > 10000) {
1061 partno = testno % 10000;
1068 logmsg("requested test number %ld part %ld", testno, partno);
1072 file = test2file(testno);
1075 sprintf(partbuf, "data%ld", partno);
1078 FILE *stream=fopen(file, "rb");
1081 logmsg("fopen() failed with error: %d %s", error, strerror(error));
1082 logmsg("Error opening file: %s", file);
1083 logmsg("Couldn't open test file: %s", file);
1088 error = getpart(&test->buffer, &count, "reply", partbuf, stream);
1091 logmsg("getpart() failed with error: %d", error);
1095 test->rptr = test->buffer; /* set read pointer */
1096 test->bufsize = count; /* set total count */
1097 test->rcount = count; /* set data left to read */
1108 logmsg("no slash found in path");
1109 return EACCESS; /* failure */
1112 logmsg("file opened and all is good");
1117 * Send the requested file.
1119 static void sendtftp(struct testcase *test, struct formats *pf)
1124 #if defined(HAVE_ALARM) && defined(SIGALRM)
1125 mysignal(SIGALRM, timer);
1130 size = readit(test, &sdp, pf->f_convert);
1135 sdp->th_opcode = htons((u_short)opcode_DATA);
1136 sdp->th_block = htons((u_short)sendblock);
1138 #ifdef HAVE_SIGSETJMP
1139 (void) sigsetjmp(timeoutbuf, 1);
1142 if (swrite(peer, sdp, size + 4) != size + 4) {
1146 read_ahead(test, pf->f_convert);
1149 alarm(rexmtval); /* read the ack */
1151 n = sread(peer, &ackbuf.storage[0], sizeof(ackbuf.storage));
1158 logmsg("read: fail");
1161 sap->th_opcode = ntohs((u_short)sap->th_opcode);
1162 sap->th_block = ntohs((u_short)sap->th_block);
1164 if (sap->th_opcode == opcode_ERROR) {
1165 logmsg("got ERROR");
1169 if (sap->th_opcode == opcode_ACK) {
1170 if (sap->th_block == sendblock) {
1173 /* Re-synchronize with the other side */
1174 (void) synchnet(peer);
1175 if (sap->th_block == (sendblock-1)) {
1182 } while (size == SEGSIZE);
1188 static void recvtftp(struct testcase *test, struct formats *pf)
1192 #if defined(HAVE_ALARM) && defined(SIGALRM)
1193 mysignal(SIGALRM, timer);
1199 rap->th_opcode = htons((u_short)opcode_ACK);
1200 rap->th_block = htons((u_short)recvblock);
1202 #ifdef HAVE_SIGSETJMP
1203 (void) sigsetjmp(timeoutbuf, 1);
1206 if (swrite(peer, &ackbuf.storage[0], 4) != 4) {
1207 logmsg("write: fail\n");
1210 write_behind(test, pf->f_convert);
1215 n = sread(peer, rdp, PKTSIZE);
1221 if (n < 0) { /* really? */
1222 logmsg("read: fail\n");
1225 rdp->th_opcode = ntohs((u_short)rdp->th_opcode);
1226 rdp->th_block = ntohs((u_short)rdp->th_block);
1227 if (rdp->th_opcode == opcode_ERROR)
1229 if (rdp->th_opcode == opcode_DATA) {
1230 if (rdp->th_block == recvblock) {
1233 /* Re-synchronize with the other side */
1234 (void) synchnet(peer);
1235 if (rdp->th_block == (recvblock-1))
1236 goto send_ack; /* rexmit */
1240 size = writeit(test, &rdp, (int)(n - 4), pf->f_convert);
1241 if (size != (n-4)) { /* ahem */
1248 } while (size == SEGSIZE);
1249 write_behind(test, pf->f_convert);
1251 rap->th_opcode = htons((u_short)opcode_ACK); /* send the "final" ack */
1252 rap->th_block = htons((u_short)recvblock);
1253 (void) swrite(peer, &ackbuf.storage[0], 4);
1254 #if defined(HAVE_ALARM) && defined(SIGALRM)
1255 mysignal(SIGALRM, justtimeout); /* just abort read on timeout */
1258 /* normally times out and quits */
1259 n = sread(peer, &buf.storage[0], sizeof(buf.storage));
1265 if (n >= 4 && /* if read some data */
1266 rdp->th_opcode == opcode_DATA && /* and got a data block */
1267 recvblock == rdp->th_block) { /* then my last ack was lost */
1268 (void) swrite(peer, &ackbuf.storage[0], 4); /* resend final ack */
1275 * Send a nak packet (error message). Error code passed in is one of the
1276 * standard TFTP codes, or a UNIX errno offset by 100.
1278 static void nak(int error)
1285 tp->th_opcode = htons((u_short)opcode_ERROR);
1286 tp->th_code = htons((u_short)error);
1287 for (pe = errmsgs; pe->e_code >= 0; pe++)
1288 if (pe->e_code == error)
1290 if (pe->e_code < 0) {
1291 pe->e_msg = strerror(error - 100);
1292 tp->th_code = EUNDEF; /* set 'undef' errorcode */
1294 strcpy(tp->th_msg, pe->e_msg);
1295 length = (int)strlen(pe->e_msg);
1296 tp->th_msg[length] = '\0';
1298 if (swrite(peer, &buf.storage[0], length) != length)
1299 logmsg("nak: fail\n");