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_NETINET_IN_H
62 #include <netinet/in.h>
64 #ifdef HAVE_ARPA_INET_H
65 #include <arpa/inet.h>
67 #ifdef HAVE_ARPA_TFTP_H
68 #include <arpa/tftp.h>
75 #ifdef HAVE_SYS_FILIO_H
76 /* FIONREAD on Solaris 7 */
77 #include <sys/filio.h>
86 #define ENABLE_CURLX_PRINTF
87 /* make the curlx header define all printf() functions to use the curlx_*
89 #include "curlx.h" /* from the private lib dir */
92 #include "server_sockaddr.h"
94 /* include memdebug.h last */
97 /*****************************************************************************
98 * STRUCT DECLARATIONS AND DEFINES *
99 *****************************************************************************/
102 #define PKTSIZE (SEGSIZE + 4) /* SEGSIZE defined in arpa/tftp.h */
106 char *buffer; /* holds the file data to send to the client */
107 size_t bufsize; /* size of the data in buffer */
108 char *rptr; /* read pointer into the buffer */
109 size_t rcount; /* amount of data left to read of the file */
110 long testno; /* test case number */
111 int ofile; /* file descriptor for output file when uploading to us */
113 int writedelay; /* number of seconds between each packet */
128 char storage[PKTSIZE];
132 * bf.counter values in range [-1 .. SEGSIZE] represents size of data in the
133 * bf.buf buffer. Additionally it can also hold flags BF_ALLOC or BF_FREE.
137 int counter; /* size of data in buffer, or flag */
138 tftphdr_storage_t buf; /* room for data packet */
141 #define BF_ALLOC -3 /* alloc'd but not yet filled */
142 #define BF_FREE -2 /* free */
146 #define opcode_DATA 3
148 #define opcode_ERROR 5
153 #define MIN(x,y) ((x)<(y)?(x):(y))
155 #ifndef DEFAULT_LOGFILE
156 #define DEFAULT_LOGFILE "log/tftpd.log"
159 #define REQUEST_DUMP "log/server.input"
161 #define DEFAULT_PORT 8999 /* UDP */
163 /*****************************************************************************
165 *****************************************************************************/
167 static struct errmsg errmsgs[] = {
168 { EUNDEF, "Undefined error code" },
169 { ENOTFOUND, "File not found" },
170 { EACCESS, "Access violation" },
171 { ENOSPACE, "Disk full or allocation exceeded" },
172 { EBADOP, "Illegal TFTP operation" },
173 { EBADID, "Unknown transfer ID" },
174 { EEXISTS, "File already exists" },
175 { ENOUSER, "No such user" },
179 static struct formats formata[] = {
185 static struct bf bfs[2];
187 static int nextone; /* index of next buffer to use */
188 static int current; /* index of buffer in use */
190 /* control flags for crlf conversions */
191 static int newline = 0; /* fillbuf: in middle of newline expansion */
192 static int prevchar = -1; /* putbuf: previous char (cr check) */
194 static tftphdr_storage_t buf;
195 static tftphdr_storage_t ackbuf;
197 static srvr_sockaddr_union_t from;
198 static curl_socklen_t fromlen;
200 static curl_socket_t peer = CURL_SOCKET_BAD;
203 static int maxtimeout = 5 * TIMEOUT;
206 static bool use_ipv6 = FALSE;
208 static const char *ipv_inuse = "IPv4";
210 const char *serverlogfile = DEFAULT_LOGFILE;
211 static char *pidname= (char *)".tftpd.pid";
212 static int serverlogslocked = 0;
213 static int wrotepidfile = 0;
215 #ifdef HAVE_SIGSETJMP
216 static sigjmp_buf timeoutbuf;
219 #if defined(HAVE_ALARM) && defined(SIGALRM)
220 static int rexmtval = TIMEOUT;
223 /* do-nothing macro replacement for systems which lack siginterrupt() */
225 #ifndef HAVE_SIGINTERRUPT
226 #define siginterrupt(x,y) do {} while(0)
229 /* vars used to keep around previous signal handlers */
231 typedef RETSIGTYPE (*SIGHANDLER_T)(int);
234 static SIGHANDLER_T old_sighup_handler = SIG_ERR;
238 static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
242 static SIGHANDLER_T old_sigint_handler = SIG_ERR;
246 static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
249 #if defined(SIGBREAK) && defined(WIN32)
250 static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
253 /* var which if set indicates that the program should finish execution */
255 SIG_ATOMIC_T got_exit_signal = 0;
257 /* if next is set indicates the first signal handled in exit_signal_handler */
259 static volatile int exit_signal = 0;
261 /*****************************************************************************
262 * FUNCTION PROTOTYPES *
263 *****************************************************************************/
265 static struct tftphdr *rw_init(int);
267 static struct tftphdr *w_init(void);
269 static struct tftphdr *r_init(void);
271 static void read_ahead(struct testcase *test, int convert);
273 static ssize_t write_behind(struct testcase *test, int convert);
275 static int synchnet(curl_socket_t);
277 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size);
279 static int validate_access(struct testcase *test, const char *fname, int mode);
281 static void sendtftp(struct testcase *test, struct formats *pf);
283 static void recvtftp(struct testcase *test, struct formats *pf);
285 static void nak(int error);
287 #if defined(HAVE_ALARM) && defined(SIGALRM)
289 static void mysignal(int sig, void (*handler)(int));
291 static void timer(int signum);
293 static void justtimeout(int signum);
295 #endif /* HAVE_ALARM && SIGALRM */
297 static RETSIGTYPE exit_signal_handler(int signum);
299 static void install_signal_handlers(void);
301 static void restore_signal_handlers(void);
303 /*****************************************************************************
304 * FUNCTION IMPLEMENTATIONS *
305 *****************************************************************************/
307 #if defined(HAVE_ALARM) && defined(SIGALRM)
310 * Like signal(), but with well-defined semantics.
312 static void mysignal(int sig, void (*handler)(int))
315 memset(&sa, 0, sizeof(sa));
316 sa.sa_handler = handler;
317 sigaction(sig, &sa, NULL);
320 static void timer(int signum)
327 if(timeout >= maxtimeout) {
332 if(serverlogslocked) {
333 serverlogslocked = 0;
334 clear_advisor_read_lock(SERVERLOGS_LOCK);
338 #ifdef HAVE_SIGSETJMP
339 siglongjmp(timeoutbuf, 1);
343 static void justtimeout(int signum)
348 #endif /* HAVE_ALARM && SIGALRM */
350 /* signal handler that will be triggered to indicate that the program
351 should finish its execution in a controlled manner as soon as possible.
352 The first time this is called it will set got_exit_signal to one and
353 store in exit_signal the signal that triggered its execution. */
355 static RETSIGTYPE exit_signal_handler(int signum)
357 int old_errno = errno;
358 if(got_exit_signal == 0) {
360 exit_signal = signum;
362 (void)signal(signum, exit_signal_handler);
366 static void install_signal_handlers(void)
369 /* ignore SIGHUP signal */
370 if((old_sighup_handler = signal(SIGHUP, SIG_IGN)) == SIG_ERR)
371 logmsg("cannot install SIGHUP handler: %s", strerror(errno));
374 /* ignore SIGPIPE signal */
375 if((old_sigpipe_handler = signal(SIGPIPE, SIG_IGN)) == SIG_ERR)
376 logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
379 /* handle SIGINT signal with our exit_signal_handler */
380 if((old_sigint_handler = signal(SIGINT, exit_signal_handler)) == SIG_ERR)
381 logmsg("cannot install SIGINT handler: %s", strerror(errno));
383 siginterrupt(SIGINT, 1);
386 /* handle SIGTERM signal with our exit_signal_handler */
387 if((old_sigterm_handler = signal(SIGTERM, exit_signal_handler)) == SIG_ERR)
388 logmsg("cannot install SIGTERM handler: %s", strerror(errno));
390 siginterrupt(SIGTERM, 1);
392 #if defined(SIGBREAK) && defined(WIN32)
393 /* handle SIGBREAK signal with our exit_signal_handler */
394 if((old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler)) == SIG_ERR)
395 logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
397 siginterrupt(SIGBREAK, 1);
401 static void restore_signal_handlers(void)
404 if(SIG_ERR != old_sighup_handler)
405 (void)signal(SIGHUP, old_sighup_handler);
408 if(SIG_ERR != old_sigpipe_handler)
409 (void)signal(SIGPIPE, old_sigpipe_handler);
412 if(SIG_ERR != old_sigint_handler)
413 (void)signal(SIGINT, old_sigint_handler);
416 if(SIG_ERR != old_sigterm_handler)
417 (void)signal(SIGTERM, old_sigterm_handler);
419 #if defined(SIGBREAK) && defined(WIN32)
420 if(SIG_ERR != old_sigbreak_handler)
421 (void)signal(SIGBREAK, old_sigbreak_handler);
426 * init for either read-ahead or write-behind.
427 * zero for write-behind, one for read-head.
429 static struct tftphdr *rw_init(int x)
431 newline = 0; /* init crlf flag */
433 bfs[0].counter = BF_ALLOC; /* pass out the first buffer */
435 bfs[1].counter = BF_FREE;
436 nextone = x; /* ahead or behind? */
437 return &bfs[0].buf.hdr;
440 static struct tftphdr *w_init(void)
442 return rw_init(0); /* write-behind */
445 static struct tftphdr *r_init(void)
447 return rw_init(1); /* read-ahead */
450 /* Have emptied current buffer by sending to net and getting ack.
451 Free it and return next buffer filled with data.
453 static int readit(struct testcase *test, struct tftphdr **dpp,
454 int convert /* if true, convert to ascii */)
458 bfs[current].counter = BF_FREE; /* free old one */
459 current = !current; /* "incr" current */
461 b = &bfs[current]; /* look at new buffer */
462 if (b->counter == BF_FREE) /* if it's empty */
463 read_ahead(test, convert); /* fill it */
465 *dpp = &b->buf.hdr; /* set caller's ptr */
470 * fill the input buffer, doing ascii conversions if requested
471 * conversions are lf -> cr,lf and cr -> cr, nul
473 static void read_ahead(struct testcase *test,
474 int convert /* if true, convert to ascii */)
482 b = &bfs[nextone]; /* look at "next" buffer */
483 if (b->counter != BF_FREE) /* nop if not free */
485 nextone = !nextone; /* "incr" next buffer ptr */
490 /* The former file reading code did this:
491 b->counter = read(fileno(file), dp->th_data, SEGSIZE); */
492 size_t copy_n = MIN(SEGSIZE, test->rcount);
493 memcpy(dp->th_data, test->rptr, copy_n);
495 /* decrease amount, advance pointer */
496 test->rcount -= copy_n;
497 test->rptr += copy_n;
498 b->counter = (int)copy_n;
503 for (i = 0 ; i < SEGSIZE; i++) {
505 if (prevchar == '\n')
506 c = '\n'; /* lf to cr,lf */
508 c = '\0'; /* cr to cr,nul */
519 if (c == '\n' || c == '\r') {
527 b->counter = (int)(p - dp->th_data);
530 /* Update count associated with the buffer, get new buffer from the queue.
531 Calls write_behind only if next buffer not available.
533 static int writeit(struct testcase *test, struct tftphdr * volatile *dpp,
536 bfs[current].counter = ct; /* set size of data to write */
537 current = !current; /* switch to other buffer */
538 if (bfs[current].counter != BF_FREE) /* if not free */
539 write_behind(test, convert); /* flush it */
540 bfs[current].counter = BF_ALLOC; /* mark as alloc'd */
541 *dpp = &bfs[current].buf.hdr;
542 return ct; /* this is a lie of course */
546 * Output a buffer to a file, converting from netascii if requested.
547 * CR,NUL -> CR and CR,LF => LF.
548 * Note spec is undefined if we get CR as last byte of file or a
549 * CR followed by anything else. In this case we leave it alone.
551 static ssize_t write_behind(struct testcase *test, int convert)
557 int c; /* current character */
562 if (b->counter < -1) /* anything to flush? */
563 return 0; /* just nop if nothing to do */
567 snprintf(outfile, sizeof(outfile), "log/upload.%ld", test->testno);
568 test->ofile=open(outfile, O_CREAT|O_RDWR, 0777);
569 if(test->ofile == -1) {
570 logmsg("Couldn't create and/or open file %s for upload!", outfile);
571 return -1; /* failure! */
575 count = b->counter; /* remember byte count */
576 b->counter = BF_FREE; /* reset flag */
578 nextone = !nextone; /* incr for next time */
579 writebuf = dp->th_data;
582 return -1; /* nak logic? */
585 return write(test->ofile, writebuf, count);
589 while (ct--) { /* loop over the buffer */
590 c = *p++; /* pick up a character */
591 if (prevchar == '\r') { /* if prev char was cr */
592 if (c == '\n') /* if have cr,lf then just */
593 lseek(test->ofile, -1, SEEK_CUR); /* smash lf on top of the cr */
595 if (c == '\0') /* if have cr,nul then */
596 goto skipit; /* just skip over the putc */
597 /* else just fall through and allow it */
601 if(1 != write(test->ofile, &c, 1))
609 /* When an error has occurred, it is possible that the two sides are out of
610 * synch. Ie: that what I think is the other side's response to packet N is
611 * really their response to packet N-1.
613 * So, to try to prevent that, we flush all the input queued up for us on the
614 * network connection on our host.
616 * We return the number of packets we flushed (mostly for reporting when trace
620 static int synchnet(curl_socket_t f /* socket to flush */)
623 #if defined(HAVE_IOCTLSOCKET)
630 srvr_sockaddr_union_t fromaddr;
631 curl_socklen_t fromaddrlen;
634 #if defined(HAVE_IOCTLSOCKET)
635 (void) ioctlsocket(f, FIONREAD, &i);
637 (void) ioctl(f, FIONREAD, &i);
644 fromaddrlen = sizeof(fromaddr.sa4);
647 fromaddrlen = sizeof(fromaddr.sa6);
649 (void) recvfrom(f, rbuf, sizeof(rbuf), 0,
650 &fromaddr.sa, &fromaddrlen);
658 int main(int argc, char **argv)
660 srvr_sockaddr_union_t me;
664 unsigned short port = DEFAULT_PORT;
665 curl_socket_t sock = CURL_SOCKET_BAD;
670 struct testcase test;
673 memset(&test, 0, sizeof(test));
676 if(!strcmp("--version", argv[arg])) {
677 printf("tftpd IPv4%s\n",
686 else if(!strcmp("--pidfile", argv[arg])) {
689 pidname = argv[arg++];
691 else if(!strcmp("--logfile", argv[arg])) {
694 serverlogfile = argv[arg++];
696 else if(!strcmp("--ipv4", argv[arg])) {
703 else if(!strcmp("--ipv6", argv[arg])) {
710 else if(!strcmp("--port", argv[arg])) {
714 unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
715 if((endptr != argv[arg] + strlen(argv[arg])) ||
716 (ulnum < 1025UL) || (ulnum > 65535UL)) {
717 fprintf(stderr, "tftpd: invalid --port argument (%s)\n",
721 port = curlx_ultous(ulnum);
725 else if(!strcmp("--srcdir", argv[arg])) {
733 puts("Usage: tftpd [option]\n"
735 " --logfile [file]\n"
736 " --pidfile [file]\n"
747 atexit(win32_cleanup);
750 install_signal_handlers();
752 pid = (long)getpid();
757 sock = socket(AF_INET, SOCK_DGRAM, 0);
760 sock = socket(AF_INET6, SOCK_DGRAM, 0);
763 if(CURL_SOCKET_BAD == sock) {
765 logmsg("Error creating socket: (%d) %s",
766 error, strerror(error));
772 if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
773 (void *)&flag, sizeof(flag))) {
775 logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s",
776 error, strerror(error));
784 memset(&me.sa4, 0, sizeof(me.sa4));
785 me.sa4.sin_family = AF_INET;
786 me.sa4.sin_addr.s_addr = INADDR_ANY;
787 me.sa4.sin_port = htons(port);
788 rc = bind(sock, &me.sa, sizeof(me.sa4));
792 memset(&me.sa6, 0, sizeof(me.sa6));
793 me.sa6.sin6_family = AF_INET6;
794 me.sa6.sin6_addr = in6addr_any;
795 me.sa6.sin6_port = htons(port);
796 rc = bind(sock, &me.sa, sizeof(me.sa6));
798 #endif /* ENABLE_IPV6 */
801 logmsg("Error binding socket on port %hu: (%d) %s",
802 port, error, strerror(error));
807 wrotepidfile = write_pidfile(pidname);
813 logmsg("Running %s version on port UDP/%d", ipv_inuse, (int)port);
816 fromlen = sizeof(from);
820 fromlen = sizeof(from.sa4);
823 fromlen = sizeof(from.sa6);
825 n = (ssize_t)recvfrom(sock, &buf.storage[0], sizeof(buf.storage), 0,
835 set_advisor_read_lock(SERVERLOGS_LOCK);
836 serverlogslocked = 1;
841 from.sa4.sin_family = AF_INET;
842 peer = socket(AF_INET, SOCK_DGRAM, 0);
843 if(CURL_SOCKET_BAD == peer) {
848 if(connect(peer, &from.sa, sizeof(from.sa4)) < 0) {
849 logmsg("connect: fail");
856 from.sa6.sin6_family = AF_INET6;
857 peer = socket(AF_INET6, SOCK_DGRAM, 0);
858 if(CURL_SOCKET_BAD == peer) {
863 if(connect(peer, &from.sa, sizeof(from.sa6)) < 0) {
864 logmsg("connect: fail");
871 maxtimeout = 5*TIMEOUT;
874 tp->th_opcode = ntohs(tp->th_opcode);
875 if (tp->th_opcode == opcode_RRQ || tp->th_opcode == opcode_WRQ) {
876 memset(&test, 0, sizeof(test));
877 if (do_tftp(&test, tp, n) < 0)
882 peer = CURL_SOCKET_BAD;
892 if(serverlogslocked) {
893 serverlogslocked = 0;
894 clear_advisor_read_lock(SERVERLOGS_LOCK);
897 logmsg("end of one transfer");
906 if((peer != sock) && (peer != CURL_SOCKET_BAD))
909 if(sock != CURL_SOCKET_BAD)
913 logmsg("signalled to die");
918 if(serverlogslocked) {
919 serverlogslocked = 0;
920 clear_advisor_read_lock(SERVERLOGS_LOCK);
923 restore_signal_handlers();
925 if(got_exit_signal) {
926 logmsg("========> %s tftpd (port: %d pid: %ld) exits with signal (%d)",
927 ipv_inuse, (int)port, pid, exit_signal);
929 * To properly set the return status of the process we
930 * must raise the same signal SIGINT or SIGTERM that we
931 * caught and let the old handler take care of it.
936 logmsg("========> tftpd quits");
941 * Handle initial connection protocol.
943 static int do_tftp(struct testcase *test, struct tftphdr *tp, ssize_t size)
946 int first = 1, ecode;
948 char *filename, *mode = NULL;
952 DWORD recvtimeout, recvtimeoutbak;
955 /* Open request dump file. */
956 server = fopen(REQUEST_DUMP, "ab");
959 logmsg("fopen() failed with error: %d %s", error, strerror(error));
960 logmsg("Error opening file: %s", REQUEST_DUMP);
964 /* store input protocol */
965 fprintf(server, "opcode: %x\n", tp->th_opcode);
967 cp = (char *)&tp->th_stuff;
970 while (cp < &buf.storage[size]) {
985 /* store input protocol */
986 fprintf(server, "filename: %s\n", filename);
988 for (cp = mode; cp && *cp; cp++)
990 *cp = (char)tolower((int)*cp);
992 /* store input protocol */
993 fprintf(server, "mode: %s\n", mode);
996 for (pf = formata; pf->f_mode; pf++)
997 if (strcmp(pf->f_mode, mode) == 0)
1003 ecode = validate_access(test, filename, tp->th_opcode);
1010 recvtimeout = sizeof(recvtimeoutbak);
1011 getsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
1012 (char*)&recvtimeoutbak, (int*)&recvtimeout);
1013 recvtimeout = TIMEOUT*1000;
1014 setsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
1015 (const char*)&recvtimeout, sizeof(recvtimeout));
1018 if (tp->th_opcode == opcode_WRQ)
1024 recvtimeout = recvtimeoutbak;
1025 setsockopt(peer, SOL_SOCKET, SO_RCVTIMEO,
1026 (const char*)&recvtimeout, sizeof(recvtimeout));
1032 /* Based on the testno, parse the correct server commands. */
1033 static int parse_servercmd(struct testcase *req)
1039 filename = test2file(req->testno);
1041 stream=fopen(filename, "rb");
1044 logmsg("fopen() failed with error: %d %s", error, strerror(error));
1045 logmsg(" [1] Error opening file: %s", filename);
1046 logmsg(" Couldn't open test file %ld", req->testno);
1047 return 1; /* done */
1050 char *orgcmd = NULL;
1055 /* get the custom server control "commands" */
1056 error = getpart(&orgcmd, &cmdsize, "reply", "servercmd", stream);
1059 logmsg("getpart() failed with error: %d", error);
1060 return 1; /* done */
1064 while(cmd && cmdsize) {
1066 if(1 == sscanf(cmd, "writedelay: %d", &num)) {
1067 logmsg("instructed to delay %d secs between packets", num);
1068 req->writedelay = num;
1071 logmsg("Unknown <servercmd> instruction found: %s", cmd);
1073 /* try to deal with CRLF or just LF */
1074 check = strchr(cmd, '\r');
1076 check = strchr(cmd, '\n');
1079 /* get to the letter following the newline */
1080 while((*check == '\r') || (*check == '\n'))
1084 /* if we reached a zero, get out */
1099 * Validate file access.
1101 static int validate_access(struct testcase *test,
1102 const char *filename, int mode)
1105 long testno, partno;
1107 char partbuf[80]="data";
1109 logmsg("trying to get file: %s mode %x", filename, mode);
1111 if(!strncmp("verifiedserver", filename, 14)) {
1113 size_t count = sprintf(weare, "WE ROOLZ: %ld\r\n", (long)getpid());
1115 logmsg("Are-we-friendly question received");
1116 test->buffer = strdup(weare);
1117 test->rptr = test->buffer; /* set read pointer */
1118 test->bufsize = count; /* set total count */
1119 test->rcount = count; /* set data left to read */
1120 return 0; /* fine */
1123 /* find the last slash */
1124 ptr = strrchr(filename, '/');
1129 ptr++; /* skip the slash */
1131 /* skip all non-numericals following the slash */
1132 while(*ptr && !ISDIGIT(*ptr))
1135 /* get the number */
1136 testno = strtol(ptr, &ptr, 10);
1138 if(testno > 10000) {
1139 partno = testno % 10000;
1146 logmsg("requested test number %ld part %ld", testno, partno);
1148 test->testno = testno;
1150 (void)parse_servercmd(test);
1152 file = test2file(testno);
1155 sprintf(partbuf, "data%ld", partno);
1158 FILE *stream=fopen(file, "rb");
1161 logmsg("fopen() failed with error: %d %s", error, strerror(error));
1162 logmsg("Error opening file: %s", file);
1163 logmsg("Couldn't open test file: %s", file);
1168 error = getpart(&test->buffer, &count, "reply", partbuf, stream);
1171 logmsg("getpart() failed with error: %d", error);
1175 test->rptr = test->buffer; /* set read pointer */
1176 test->bufsize = count; /* set total count */
1177 test->rcount = count; /* set data left to read */
1188 logmsg("no slash found in path");
1189 return EACCESS; /* failure */
1192 logmsg("file opened and all is good");
1197 * Send the requested file.
1199 static void sendtftp(struct testcase *test, struct formats *pf)
1203 /* This is volatile to live through a siglongjmp */
1204 volatile unsigned short sendblock; /* block count */
1205 struct tftphdr *sdp; /* data buffer */
1206 struct tftphdr *sap; /* ack buffer */
1209 #if defined(HAVE_ALARM) && defined(SIGALRM)
1210 mysignal(SIGALRM, timer);
1215 size = readit(test, &sdp, pf->f_convert);
1220 sdp->th_opcode = htons((unsigned short)opcode_DATA);
1221 sdp->th_block = htons(sendblock);
1223 #ifdef HAVE_SIGSETJMP
1224 (void) sigsetjmp(timeoutbuf, 1);
1226 if(test->writedelay) {
1227 logmsg("Pausing %d seconds before %d bytes", test->writedelay,
1229 wait_ms(1000*test->writedelay);
1233 if (swrite(peer, sdp, size + 4) != size + 4) {
1237 read_ahead(test, pf->f_convert);
1240 alarm(rexmtval); /* read the ack */
1242 n = sread(peer, &ackbuf.storage[0], sizeof(ackbuf.storage));
1249 logmsg("read: fail");
1252 sap->th_opcode = ntohs((unsigned short)sap->th_opcode);
1253 sap->th_block = ntohs(sap->th_block);
1255 if (sap->th_opcode == opcode_ERROR) {
1256 logmsg("got ERROR");
1260 if (sap->th_opcode == opcode_ACK) {
1261 if (sap->th_block == sendblock) {
1264 /* Re-synchronize with the other side */
1265 (void) synchnet(peer);
1266 if (sap->th_block == (sendblock-1)) {
1273 } while (size == SEGSIZE);
1279 static void recvtftp(struct testcase *test, struct formats *pf)
1282 /* These are volatile to live through a siglongjmp */
1283 volatile unsigned short recvblock; /* block count */
1284 struct tftphdr * volatile rdp; /* data buffer */
1285 struct tftphdr *rap; /* ack buffer */
1289 #if defined(HAVE_ALARM) && defined(SIGALRM)
1290 mysignal(SIGALRM, timer);
1295 rap->th_opcode = htons((unsigned short)opcode_ACK);
1296 rap->th_block = htons(recvblock);
1298 #ifdef HAVE_SIGSETJMP
1299 (void) sigsetjmp(timeoutbuf, 1);
1302 if (swrite(peer, &ackbuf.storage[0], 4) != 4) {
1303 logmsg("write: fail\n");
1306 write_behind(test, pf->f_convert);
1311 n = sread(peer, rdp, PKTSIZE);
1317 if (n < 0) { /* really? */
1318 logmsg("read: fail\n");
1321 rdp->th_opcode = ntohs((unsigned short)rdp->th_opcode);
1322 rdp->th_block = ntohs(rdp->th_block);
1323 if (rdp->th_opcode == opcode_ERROR)
1325 if (rdp->th_opcode == opcode_DATA) {
1326 if (rdp->th_block == recvblock) {
1329 /* Re-synchronize with the other side */
1330 (void) synchnet(peer);
1331 if (rdp->th_block == (recvblock-1))
1332 goto send_ack; /* rexmit */
1336 size = writeit(test, &rdp, (int)(n - 4), pf->f_convert);
1337 if (size != (n-4)) { /* ahem */
1344 } while (size == SEGSIZE);
1345 write_behind(test, pf->f_convert);
1347 rap->th_opcode = htons((unsigned short)opcode_ACK); /* send the "final" ack */
1348 rap->th_block = htons(recvblock);
1349 (void) swrite(peer, &ackbuf.storage[0], 4);
1350 #if defined(HAVE_ALARM) && defined(SIGALRM)
1351 mysignal(SIGALRM, justtimeout); /* just abort read on timeout */
1354 /* normally times out and quits */
1355 n = sread(peer, &buf.storage[0], sizeof(buf.storage));
1361 if (n >= 4 && /* if read some data */
1362 rdp->th_opcode == opcode_DATA && /* and got a data block */
1363 recvblock == rdp->th_block) { /* then my last ack was lost */
1364 (void) swrite(peer, &ackbuf.storage[0], 4); /* resend final ack */
1371 * Send a nak packet (error message). Error code passed in is one of the
1372 * standard TFTP codes, or a Unix errno offset by 100.
1374 static void nak(int error)
1381 tp->th_opcode = htons((unsigned short)opcode_ERROR);
1382 tp->th_code = htons((unsigned short)error);
1383 for (pe = errmsgs; pe->e_code >= 0; pe++)
1384 if (pe->e_code == error)
1386 if (pe->e_code < 0) {
1387 pe->e_msg = strerror(error - 100);
1388 tp->th_code = EUNDEF; /* set 'undef' errorcode */
1390 length = (int)strlen(pe->e_msg);
1392 /* we use memcpy() instead of strcpy() in order to avoid buffer overflow
1393 * report from glibc with FORTIFY_SOURCE */
1394 memcpy(tp->th_msg, pe->e_msg, length + 1);
1396 if (swrite(peer, &buf.storage[0], length) != length)
1397 logmsg("nak: fail\n");