diff options
Diffstat (limited to 'libexec/tftpd/tftpd.c')
| -rw-r--r-- | libexec/tftpd/tftpd.c | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/libexec/tftpd/tftpd.c b/libexec/tftpd/tftpd.c new file mode 100644 index 000000000000..a3faee86e7d0 --- /dev/null +++ b/libexec/tftpd/tftpd.c @@ -0,0 +1,849 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Trivial file transfer protocol server. + * + * This version includes many modifications by Jim Guyton + * <guyton@rand-unix>. + */ + +#include <sys/param.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <sys/time.h> + +#include <netinet/in.h> +#include <arpa/tftp.h> + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <netdb.h> +#include <pwd.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <time.h> +#include <unistd.h> + +#include "tftp-file.h" +#include "tftp-io.h" +#include "tftp-utils.h" +#include "tftp-transfer.h" +#include "tftp-options.h" + +#ifdef LIBWRAP +#include <tcpd.h> +#endif + +static void tftp_wrq(int peer, char *, size_t); +static void tftp_rrq(int peer, char *, size_t); + +/* + * Null-terminated directory prefix list for absolute pathname requests and + * search list for relative pathname requests. + * + * MAXDIRS should be at least as large as the number of arguments that + * inetd allows (currently 20). + */ +#define MAXDIRS 20 +static struct dirlist { + const char *name; + size_t len; +} dirs[MAXDIRS+1]; +static int suppress_naks; +static int logging; +static int ipchroot; +static int check_woth = 1; +static int create_new = 0; +static const char *newfile_format = "%Y%m%d"; +static int increase_name = 0; +static mode_t mask = S_IWGRP | S_IWOTH; + +struct formats; +static void tftp_recvfile(int peer, const char *mode); +static void tftp_xmitfile(int peer, const char *mode); +static int validate_access(int peer, char **, int); +static char peername[NI_MAXHOST]; + +static FILE *file; + +static struct formats { + const char *f_mode; + int f_convert; +} formats[] = { + { "netascii", 1 }, + { "octet", 0 }, + { NULL, 0 } +}; + +int +main(int argc, char *argv[]) +{ + struct tftphdr *tp; + int peer; + socklen_t peerlen, len; + ssize_t n; + int ch; + char *chroot_dir = NULL; + struct passwd *nobody; + const char *chuser = "nobody"; + char recvbuffer[MAXPKTSIZE]; + int allow_ro = 1, allow_wo = 1, block = 0, on = 1; + pid_t pid; + + tzset(); /* syslog in localtime */ + acting_as_client = 0; + + tftp_openlog("tftpd", LOG_PID | LOG_NDELAY, LOG_FTP); + while ((ch = getopt(argc, argv, "bcCd::F:lnoOp:s:Su:U:wW")) != -1) { + switch (ch) { + case 'b': + block = 1; + break; + case 'c': + ipchroot = 1; + break; + case 'C': + ipchroot = 2; + break; + case 'd': + if (optarg == NULL) + debug++; + else if (atoi(optarg) != 0) + debug += atoi(optarg); + else + debug |= debug_finds(optarg); + break; + case 'F': + newfile_format = optarg; + break; + case 'l': + logging = 1; + break; + case 'n': + suppress_naks = 1; + break; + case 'o': + options_rfc_enabled = 0; + break; + case 'O': + options_extra_enabled = 0; + break; + case 'p': + packetdroppercentage = (unsigned int)atoi(optarg); + tftp_log(LOG_INFO, + "Randomly dropping %d out of 100 packets", + packetdroppercentage); + break; + case 's': + chroot_dir = optarg; + break; + case 'S': + check_woth = -1; + break; + case 'u': + chuser = optarg; + break; + case 'U': + mask = strtol(optarg, NULL, 0); + break; + case 'w': + create_new = 1; + break; + case 'W': + create_new = 1; + increase_name = 1; + break; + default: + tftp_log(LOG_WARNING, + "ignoring unknown option -%c", ch); + } + } + if (optind < argc) { + struct dirlist *dirp; + + /* Get list of directory prefixes. Skip relative pathnames. */ + for (dirp = dirs; optind < argc && dirp < &dirs[MAXDIRS]; + optind++) { + if (argv[optind][0] == '/') { + dirp->name = argv[optind]; + dirp->len = strlen(dirp->name); + dirp++; + } + } + } + else if (chroot_dir) { + dirs->name = "/"; + dirs->len = 1; + } + if (ipchroot > 0 && chroot_dir == NULL) { + tftp_log(LOG_ERR, "-c requires -s"); + exit(1); + } + + umask(mask); + + /* Find out who we are talking to and what we are going to do */ + peerlen = sizeof(peer_sock); + n = recvfrom(0, recvbuffer, MAXPKTSIZE, block ? 0 : MSG_DONTWAIT, + (struct sockaddr *)&peer_sock, &peerlen); + if (n < 0) { + tftp_log(LOG_ERR, "recvfrom: %s", strerror(errno)); + exit(1); + } + getnameinfo((struct sockaddr *)&peer_sock, peer_sock.ss_len, + peername, sizeof(peername), NULL, 0, NI_NUMERICHOST); + if ((size_t)n < 4 /* tftphdr */) { + tftp_log(LOG_ERR, "Rejecting %zd-byte request from %s", + n, peername); + exit(1); + } + + if (ioctl(0, FIONBIO, &on) < 0) { + tftp_log(LOG_ERR, "ioctl(FIONBIO): %s", strerror(errno)); + exit(1); + } + + /* + * Now that we have read the message out of the UDP + * socket, we fork and exit. Thus, inetd will go back + * to listening to the tftp port, and the next request + * to come in will start up a new instance of tftpd. + * + * We do this so that inetd can run tftpd in "wait" mode. + * The problem with tftpd running in "nowait" mode is that + * inetd may get one or more successful "selects" on the + * tftp port before we do our receive, so more than one + * instance of tftpd may be started up. Worse, if tftpd + * break before doing the above "recvfrom", inetd would + * spawn endless instances, clogging the system. + */ + pid = fork(); + if (pid < 0) { + tftp_log(LOG_ERR, "fork: %s", strerror(errno)); + exit(1); + } else if (pid != 0) { + exit(0); + } + /* child */ + +#ifdef LIBWRAP + /* + * See if the client is allowed to talk to me. + * (This needs to be done before the chroot()) + */ + { + struct request_info req; + + request_init(&req, RQ_CLIENT_ADDR, peername, 0); + request_set(&req, RQ_DAEMON, "tftpd", 0); + + if (hosts_access(&req) == 0) { + if (debug & DEBUG_ACCESS) + tftp_log(LOG_WARNING, + "Access denied by 'tftpd' entry " + "in /etc/hosts.allow"); + + /* + * Full access might be disabled, but maybe the + * client is allowed to do read-only access. + */ + request_set(&req, RQ_DAEMON, "tftpd-ro", 0); + allow_ro = hosts_access(&req); + + request_set(&req, RQ_DAEMON, "tftpd-wo", 0); + allow_wo = hosts_access(&req); + + if (allow_ro == 0 && allow_wo == 0) { + tftp_log(LOG_WARNING, + "Unauthorized access from %s", peername); + exit(1); + } + + if (debug & DEBUG_ACCESS) { + if (allow_ro) + tftp_log(LOG_WARNING, + "But allowed readonly access " + "via 'tftpd-ro' entry"); + if (allow_wo) + tftp_log(LOG_WARNING, + "But allowed writeonly access " + "via 'tftpd-wo' entry"); + } + } else + if (debug & DEBUG_ACCESS) + tftp_log(LOG_WARNING, + "Full access allowed" + "in /etc/hosts.allow"); + } +#endif + + /* + * Since we exit here, we should do that only after the above + * recvfrom to keep inetd from constantly forking should there + * be a problem. See the above comment about system clogging. + */ + if (chroot_dir) { + if (ipchroot > 0) { + char *tempchroot; + struct stat sb; + int statret; + struct sockaddr_storage ss; + char hbuf[NI_MAXHOST]; + + statret = -1; + memcpy(&ss, &peer_sock, peer_sock.ss_len); + unmappedaddr((struct sockaddr_in6 *)&ss); + getnameinfo((struct sockaddr *)&ss, ss.ss_len, + hbuf, sizeof(hbuf), NULL, 0, + NI_NUMERICHOST); + asprintf(&tempchroot, "%s/%s", chroot_dir, hbuf); + if (ipchroot == 2) + statret = stat(tempchroot, &sb); + if (ipchroot == 1 || + (statret == 0 && (sb.st_mode & S_IFDIR))) + chroot_dir = tempchroot; + } + /* Must get this before chroot because /etc might go away */ + if ((nobody = getpwnam(chuser)) == NULL) { + tftp_log(LOG_ERR, "%s: no such user", chuser); + exit(1); + } + if (chroot(chroot_dir)) { + tftp_log(LOG_ERR, "chroot: %s: %s", + chroot_dir, strerror(errno)); + exit(1); + } + if (chdir("/") != 0) { + tftp_log(LOG_ERR, "chdir: %s", strerror(errno)); + exit(1); + } + if (setgroups(0, NULL) != 0) { + tftp_log(LOG_ERR, "setgroups failed"); + exit(1); + } + if (setgid(nobody->pw_gid) != 0) { + tftp_log(LOG_ERR, "setgid failed"); + exit(1); + } + if (setuid(nobody->pw_uid) != 0) { + tftp_log(LOG_ERR, "setuid failed"); + exit(1); + } + if (check_woth == -1) + check_woth = 0; + } + if (check_woth == -1) + check_woth = 1; + + len = sizeof(me_sock); + if (getsockname(0, (struct sockaddr *)&me_sock, &len) == 0) { + switch (me_sock.ss_family) { + case AF_INET: + ((struct sockaddr_in *)&me_sock)->sin_port = 0; + break; + case AF_INET6: + ((struct sockaddr_in6 *)&me_sock)->sin6_port = 0; + break; + default: + /* unsupported */ + break; + } + } else { + memset(&me_sock, 0, sizeof(me_sock)); + me_sock.ss_family = peer_sock.ss_family; + me_sock.ss_len = peer_sock.ss_len; + } + close(STDIN_FILENO); + close(STDOUT_FILENO); + close(STDERR_FILENO); + peer = socket(peer_sock.ss_family, SOCK_DGRAM, 0); + if (peer < 0) { + tftp_log(LOG_ERR, "socket: %s", strerror(errno)); + exit(1); + } + if (bind(peer, (struct sockaddr *)&me_sock, me_sock.ss_len) < 0) { + tftp_log(LOG_ERR, "bind: %s", strerror(errno)); + exit(1); + } + + tp = (struct tftphdr *)recvbuffer; + tp->th_opcode = ntohs(tp->th_opcode); + if (tp->th_opcode == RRQ) { + if (allow_ro) + tftp_rrq(peer, tp->th_stuff, (size_t)n - 1); + else { + tftp_log(LOG_WARNING, + "%s read access denied", peername); + exit(1); + } + } else if (tp->th_opcode == WRQ) { + if (allow_wo) + tftp_wrq(peer, tp->th_stuff, (size_t)n - 1); + else { + tftp_log(LOG_WARNING, + "%s write access denied", peername); + exit(1); + } + } else + send_error(peer, EBADOP); + exit(1); +} + +static void +reduce_path(char *fn) +{ + char *slash, *ptr; + + /* Reduce all "/+./" to "/" (just in case we've got "/./../" later */ + while ((slash = strstr(fn, "/./")) != NULL) { + for (ptr = slash; ptr > fn && ptr[-1] == '/'; ptr--) + ; + slash += 2; + while (*slash) + *++ptr = *++slash; + } + + /* Now reduce all "/something/+../" to "/" */ + while ((slash = strstr(fn, "/../")) != NULL) { + if (slash == fn) + break; + for (ptr = slash; ptr > fn && ptr[-1] == '/'; ptr--) + ; + for (ptr--; ptr >= fn; ptr--) + if (*ptr == '/') + break; + if (ptr < fn) + break; + slash += 3; + while (*slash) + *++ptr = *++slash; + } +} + +static char * +parse_header(int peer, char *recvbuffer, size_t size, + char **filename, char **mode) +{ + struct formats *pf; + char *cp; + size_t i; + + *mode = NULL; + cp = recvbuffer; + + i = get_field(peer, recvbuffer, size); + if (i >= PATH_MAX) { + tftp_log(LOG_ERR, "Bad option - filename too long"); + send_error(peer, EBADOP); + exit(1); + } + *filename = recvbuffer; + tftp_log(LOG_INFO, "Filename: '%s'", *filename); + cp += i; + + i = get_field(peer, cp, size); + *mode = cp; + + /* Find the file transfer mode */ + for (; *cp; cp++) + if (isupper((unsigned char)*cp)) + *cp = tolower((unsigned char)*cp); + for (pf = formats; pf->f_mode; pf++) + if (strcmp(pf->f_mode, *mode) == 0) + break; + if (pf->f_mode == NULL) { + tftp_log(LOG_ERR, + "Bad option - Unknown transfer mode (%s)", *mode); + send_error(peer, EBADOP); + exit(1); + } + tftp_log(LOG_INFO, "Mode: '%s'", *mode); + + return (cp + 1); +} + +/* + * WRQ - receive a file from the client + */ +void +tftp_wrq(int peer, char *recvbuffer, size_t size) +{ + char *cp; + int has_options = 0, ecode; + char *filename, *mode; + char fnbuf[PATH_MAX]; + + cp = parse_header(peer, recvbuffer, size, &filename, &mode); + size -= (cp - recvbuffer) + 1; + + strlcpy(fnbuf, filename, sizeof(fnbuf)); + reduce_path(fnbuf); + filename = fnbuf; + + if (size > 0) { + if (options_rfc_enabled) + has_options = !parse_options(peer, cp, size); + else + tftp_log(LOG_INFO, "Options found but not enabled"); + } + + ecode = validate_access(peer, &filename, WRQ); + if (ecode == 0) { + if (has_options) + send_oack(peer); + else + send_ack(peer, 0); + } + if (logging) { + tftp_log(LOG_INFO, "%s: write request for %s: %s", peername, + filename, errtomsg(ecode)); + } + + if (ecode) { + send_error(peer, ecode); + exit(1); + } + tftp_recvfile(peer, mode); + exit(0); +} + +/* + * RRQ - send a file to the client + */ +void +tftp_rrq(int peer, char *recvbuffer, size_t size) +{ + char *cp; + int has_options = 0, ecode; + char *filename, *mode; + char fnbuf[PATH_MAX]; + + cp = parse_header(peer, recvbuffer, size, &filename, &mode); + size -= (cp - recvbuffer) + 1; + + strlcpy(fnbuf, filename, sizeof(fnbuf)); + reduce_path(fnbuf); + filename = fnbuf; + + if (size > 0) { + if (options_rfc_enabled) + has_options = !parse_options(peer, cp, size); + else + tftp_log(LOG_INFO, "Options found but not enabled"); + } + + ecode = validate_access(peer, &filename, RRQ); + if (ecode == 0) { + if (has_options) { + int n; + char lrecvbuffer[MAXPKTSIZE]; + struct tftphdr *rp = (struct tftphdr *)lrecvbuffer; + + send_oack(peer); + n = receive_packet(peer, lrecvbuffer, MAXPKTSIZE, + NULL, timeoutpacket); + if (n < 0) { + if (debug & DEBUG_SIMPLE) + tftp_log(LOG_DEBUG, "Aborting: %s", + rp_strerror(n)); + return; + } + if (rp->th_opcode != ACK) { + if (debug & DEBUG_SIMPLE) + tftp_log(LOG_DEBUG, + "Expected ACK, got %s on OACK", + packettype(rp->th_opcode)); + return; + } + } + } + + if (logging) + tftp_log(LOG_INFO, "%s: read request for %s: %s", peername, + filename, errtomsg(ecode)); + + if (ecode) { + /* + * Avoid storms of naks to a RRQ broadcast for a relative + * bootfile pathname from a diskless Sun. + */ + if (suppress_naks && *filename != '/' && ecode == ENOTFOUND) + exit(0); + send_error(peer, ecode); + exit(1); + } + tftp_xmitfile(peer, mode); +} + +/* + * Find the next value for YYYYMMDD.nn when the file to be written should + * be unique. Due to the limitations of nn, we will fail if nn reaches 100. + * Besides, that is four updates per hour on a file, which is kind of + * execessive anyway. + */ +static int +find_next_name(char *filename, int *fd) +{ + /* + * GCC "knows" that we might write all of yyyymmdd plus the static + * elemenents in the format into into newname and thus complains + * unless we reduce the size. This array is still too big, but since + * the format is user supplied, it's not clear what a better limit + * value would be and this is sufficent to silence the warnings. + */ + static const int suffix_len = strlen("..00"); + char yyyymmdd[MAXPATHLEN - suffix_len]; + char newname[MAXPATHLEN]; + int i, ret; + time_t tval; + size_t len, namelen; + struct tm lt; + + /* Create the YYYYMMDD part of the filename */ + time(&tval); + lt = *localtime(&tval); + len = strftime(yyyymmdd, sizeof(yyyymmdd), newfile_format, <); + if (len == 0) { + syslog(LOG_WARNING, + "Filename suffix too long (%zu characters maximum)", + sizeof(yyyymmdd) - 1); + return (EACCESS); + } + + /* Make sure the new filename is not too long */ + namelen = strlen(filename); + if (namelen >= sizeof(newname) - len - suffix_len) { + syslog(LOG_WARNING, + "Filename too long (%zu characters, %zu maximum)", + namelen, + sizeof(newname) - len - suffix_len - 1); + return (EACCESS); + } + + /* Find the first file which doesn't exist */ + for (i = 0; i < 100; i++) { + ret = snprintf(newname, sizeof(newname), "%s.%s.%02d", + filename, yyyymmdd, i); + /* + * Size checked above so this can't happen, we'd use a + * (void) cast, but gcc intentionally ignores that if + * snprintf has __attribute__((warn_unused_result)). + */ + if (ret < 0 || (size_t)ret >= sizeof(newname)) + __unreachable(); + *fd = open(newname, O_WRONLY | O_CREAT | O_EXCL, 0666); + if (*fd > 0) + return 0; + } + + return (EEXIST); +} + +/* + * Validate file access. Since we + * have no uid or gid, for now require + * file to exist and be publicly + * readable/writable. + * If we were invoked with arguments + * from inetd then the file must also be + * in one of the given directory prefixes. + * Note also, full path name must be + * given as we have no login directory. + */ +int +validate_access(int peer, char **filep, int mode) +{ + static char pathname[MAXPATHLEN]; + struct stat sb; + struct dirlist *dirp; + char *filename = *filep; + int err, fd; + + /* + * Prevent tricksters from getting around the directory restrictions + */ + if (strncmp(filename, "../", 3) == 0 || + strstr(filename, "/../") != NULL) + return (EACCESS); + + if (*filename == '/') { + /* + * Absolute file name: allow the request if it's in one of the + * approved locations. + */ + for (dirp = dirs; dirp->name != NULL; dirp++) { + if (dirp->len == 1) + /* Only "/" can have len 1 */ + break; + if (strncmp(filename, dirp->name, dirp->len) == 0 && + filename[dirp->len] == '/') + break; + } + /* If directory list is empty, allow access to any file */ + if (dirp->name == NULL && dirp != dirs) + return (EACCESS); + if (stat(filename, &sb) != 0) + return (errno == ENOENT ? ENOTFOUND : EACCESS); + if (!S_ISREG(sb.st_mode)) + return (ENOTFOUND); + if (mode == RRQ) { + if ((sb.st_mode & S_IROTH) == 0) + return (EACCESS); + } else { + if (check_woth && (sb.st_mode & S_IWOTH) == 0) + return (EACCESS); + } + } else { + /* + * Relative file name: search the approved locations for it. + * If the file exists in one of the directories and isn't + * readable, continue looking. However, change the error code + * to give an indication that the file exists. + */ + err = ENOTFOUND; + for (dirp = dirs; dirp->name != NULL; dirp++) { + snprintf(pathname, sizeof(pathname), "%s/%s", + dirp->name, filename); + if (stat(pathname, &sb) != 0) + continue; + if (!S_ISREG(sb.st_mode)) + continue; + err = EACCESS; + if (mode == RRQ) { + if ((sb.st_mode & S_IROTH) == 0) + continue; + } else { + if (check_woth && (sb.st_mode & S_IWOTH) == 0) + continue; + } + break; + } + if (dirp->name != NULL) + *filep = filename = pathname; + else if (mode == RRQ) + return (err); + else if (err != ENOTFOUND || !create_new) + return (err); + } + + /* + * This option is handled here because it (might) require(s) the + * size of the file. + */ + option_tsize(peer, NULL, mode, &sb); + + if (mode == RRQ) { + fd = open(filename, O_RDONLY); + } else if (create_new) { + if (increase_name) { + err = find_next_name(filename, &fd); + if (err > 0) + return (err + 100); + } else { + fd = open(filename, + O_WRONLY | O_TRUNC | O_CREAT, + S_IRUSR | S_IWUSR | S_IRGRP | + S_IWGRP | S_IROTH | S_IWOTH ); + } + } else { + fd = open(filename, O_WRONLY | O_TRUNC); + } + if (fd < 0) + return (errno + 100); + file = fdopen(fd, mode == RRQ ? "r" : "w"); + if (file == NULL) { + close(fd); + return (errno + 100); + } + return (0); +} + +static void +tftp_xmitfile(int peer, const char *mode) +{ + uint16_t block; + time_t now; + struct tftp_stats ts; + + memset(&ts, 0, sizeof(ts)); + now = time(NULL); + if (debug & DEBUG_SIMPLE) + tftp_log(LOG_DEBUG, "Transmitting file"); + + read_init(0, file, mode); + block = 1; + tftp_send(peer, &block, &ts); + read_close(); + if (debug & DEBUG_SIMPLE) + tftp_log(LOG_INFO, "Sent %jd bytes in %jd seconds", + (intmax_t)ts.amount, (intmax_t)time(NULL) - now); +} + +static void +tftp_recvfile(int peer, const char *mode) +{ + uint16_t block; + struct timeval now1, now2; + struct tftp_stats ts; + + gettimeofday(&now1, NULL); + if (debug & DEBUG_SIMPLE) + tftp_log(LOG_DEBUG, "Receiving file"); + + write_init(0, file, mode); + + block = 0; + tftp_receive(peer, &block, &ts, NULL, 0); + + gettimeofday(&now2, NULL); + + if (debug & DEBUG_SIMPLE) { + double f; + if (now1.tv_usec > now2.tv_usec) { + now2.tv_usec += 1000000; + now2.tv_sec--; + } + + f = now2.tv_sec - now1.tv_sec + + (now2.tv_usec - now1.tv_usec) / 100000.0; + tftp_log(LOG_INFO, + "Download of %jd bytes in %d blocks completed after %0.1f seconds\n", + (intmax_t)ts.amount, block, f); + } + + return; +} |