-/* ------------------------------------------------------------------------- */
-/* tftp.c */
-/* */
-/* A simple tftp client for busybox. */
-/* Tries to follow RFC1350. */
-/* Only "octet" mode supported. */
-/* Optional blocksize negotiation (RFC2347 + RFC2348) */
-/* */
-/* Copyright (C) 2001 Magnus Damm <damm@opensource.se> */
-/* */
-/* Parts of the code based on: */
-/* */
-/* atftp: Copyright (C) 2000 Jean-Pierre Lefebvre <helix@step.polymtl.ca> */
-/* and Remi Lefebvre <remi@debian.org> */
-/* */
-/* utftp: Copyright (C) 1999 Uwe Ohse <uwe@ohse.de> */
-/* */
-/* This program is free software; you can redistribute it and/or modify */
-/* it under the terms of the GNU General Public License as published by */
-/* the Free Software Foundation; either version 2 of the License, or */
-/* (at your option) any later version. */
-/* */
-/* This program is distributed in the hope that it will be useful, */
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
-/* General Public License for more details. */
-/* */
-/* You should have received a copy of the GNU General Public License */
-/* along with this program; if not, write to the Free Software */
-/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
-/* */
-/* ------------------------------------------------------------------------- */
+/* vi: set sw=4 ts=4: */
+/* -------------------------------------------------------------------------
+ * tftp.c
+ *
+ * A simple tftp client for busybox.
+ * Tries to follow RFC1350.
+ * Only "octet" mode supported.
+ * Optional blocksize negotiation (RFC2347 + RFC2348)
+ *
+ * Copyright (C) 2001 Magnus Damm <damm@opensource.se>
+ *
+ * Parts of the code based on:
+ *
+ * atftp: Copyright (C) 2000 Jean-Pierre Lefebvre <helix@step.polymtl.ca>
+ * and Remi Lefebvre <remi@debian.org>
+ *
+ * utftp: Copyright (C) 1999 Uwe Ohse <uwe@ohse.de>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * ------------------------------------------------------------------------- */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
-#include <sys/time.h>
#include <sys/stat.h>
#include <netdb.h>
#include <netinet/in.h>
#define TFTP_ERROR 5
#define TFTP_OACK 6
-static const char *tftp_error_msg[] = {
+static const char * const tftp_bb_error_msg[] = {
"Undefined error",
"File not found",
"Access violation",
"No such user"
};
-const int tftp_cmd_get = 1;
-const int tftp_cmd_put = 2;
+#ifdef CONFIG_FEATURE_TFTP_GET
+# define tftp_cmd_get 1
+#else
+# define tftp_cmd_get 0
+#endif
+#ifdef CONFIG_FEATURE_TFTP_PUT
+# define tftp_cmd_put (tftp_cmd_get+1)
+#else
+# define tftp_cmd_put 0
+#endif
+
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
-static int tftp_blocksize_check(int blocksize, int bufsize)
+static int tftp_blocksize_check(int blocksize, int bufsize)
{
- /* Check if the blocksize is valid:
+ /* Check if the blocksize is valid:
* RFC2348 says between 8 and 65464,
* but our implementation makes it impossible
* to use blocksizes smaller than 22 octets.
*/
- if ((bufsize && (blocksize > bufsize)) ||
+ if ((bufsize && (blocksize > bufsize)) ||
(blocksize < 8) || (blocksize > 65464)) {
- error_msg("bad blocksize");
+ bb_error_msg("bad blocksize");
return 0;
}
return blocksize;
}
-static char *tftp_option_get(char *buf, int len, char *option)
+static char *tftp_option_get(char *buf, int len, char *option)
{
- int opt_val = 0;
+ int opt_val = 0;
int opt_found = 0;
int k;
-
+
while (len > 0) {
/* Make sure the options are terminated correctly */
if (strcasecmp(buf, option) == 0) {
opt_found = 1;
}
- }
+ }
else {
if (opt_found) {
return buf;
}
}
-
+
k++;
-
+
buf += k;
len -= k;
-
+
opt_val ^= 1;
}
-
+
return NULL;
}
#endif
static inline int tftp(const int cmd, const struct hostent *host,
- const char *remotefile, int localfd, const int port, int tftp_bufsize)
+ const char *remotefile, int localfd, const unsigned short port, int tftp_bufsize)
{
const int cmd_get = cmd & tftp_cmd_get;
const int cmd_put = cmd & tftp_cmd_put;
int opcode = 0;
int finished = 0;
int timeout = bb_tftp_num_retries;
- int block_nr = 1;
+ unsigned short block_nr = 1;
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
int want_option_ack = 0;
tftp_bufsize += 4;
- if ((socketfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
- perror_msg("socket");
+ if ((socketfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) { /* bb_xsocket? */
+ bb_perror_msg("socket");
return EXIT_FAILURE;
}
bind(socketfd, (struct sockaddr *)&sa, len);
sa.sin_family = host->h_addrtype;
- sa.sin_port = htons(port);
+ sa.sin_port = port;
memcpy(&sa.sin_addr, (struct in_addr *) host->h_addr,
sizeof(sa.sin_addr));
if ((cmd_get && (opcode == TFTP_RRQ)) ||
(cmd_put && (opcode == TFTP_WRQ))) {
- int too_long = 0;
+ int too_long = 0;
/* see if the filename fits into buf */
/* and fill in packet */
}
if (too_long || ((&buf[tftp_bufsize - 1] - cp) < 6)) {
- error_msg("too long remote-filename");
+ bb_error_msg("too long remote-filename");
break;
}
if (len != TFTP_BLOCKSIZE_DEFAULT) {
if ((&buf[tftp_bufsize - 1] - cp) < 15) {
- error_msg("too long remote-filename");
+ bb_error_msg("too long remote-filename");
break;
}
block_nr++;
if (cmd_put && (opcode == TFTP_DATA)) {
- len = read(localfd, cp, tftp_bufsize - 4);
+ len = bb_full_read(localfd, cp, tftp_bufsize - 4);
if (len < 0) {
- perror_msg("read");
+ bb_perror_msg("read");
break;
}
/* send packet */
+ timeout = bb_tftp_num_retries; /* re-initialize */
do {
len = cp - buf;
#ifdef CONFIG_FEATURE_TFTP_DEBUG
- printf("sending %u bytes\n", len);
+ fprintf(stderr, "sending %u bytes\n", len);
for (cp = buf; cp < &buf[len]; cp++)
- printf("%02x ", *cp);
- printf("\n");
+ fprintf(stderr, "%02x ", (unsigned char)*cp);
+ fprintf(stderr, "\n");
#endif
if (sendto(socketfd, buf, len, 0,
(struct sockaddr *) &sa, sizeof(sa)) < 0) {
- perror_msg("send");
+ bb_perror_msg("send");
len = -1;
break;
}
- if (finished) {
+ if (finished && (opcode == TFTP_ACK)) {
break;
}
FD_ZERO(&rfds);
FD_SET(socketfd, &rfds);
- switch (select(FD_SETSIZE, &rfds, NULL, NULL, &tv)) {
+ switch (select(socketfd + 1, &rfds, NULL, NULL, &tv)) {
case 1:
len = recvfrom(socketfd, buf, tftp_bufsize, 0,
(struct sockaddr *) &from, &fromlen);
if (len < 0) {
- perror_msg("recvfrom");
+ bb_perror_msg("recvfrom");
break;
}
timeout = 0;
- if (sa.sin_port == htons(port)) {
+ if (sa.sin_port == port) {
sa.sin_port = from.sin_port;
}
if (sa.sin_port == from.sin_port) {
timeout = bb_tftp_num_retries;
case 0:
- error_msg("timeout");
+ bb_error_msg("timeout");
+ timeout--;
if (timeout == 0) {
len = -1;
- error_msg("last timeout");
- } else {
- timeout--;
+ bb_error_msg("last timeout");
}
break;
default:
- perror_msg("select");
+ bb_perror_msg("select");
len = -1;
}
tmp = ntohs(*((unsigned short *) &buf[2]));
#ifdef CONFIG_FEATURE_TFTP_DEBUG
- printf("received %d bytes: %04x %04x\n", len, opcode, tmp);
+ fprintf(stderr, "received %d bytes: %04x %04x\n", len, opcode, tmp);
#endif
if (opcode == TFTP_ERROR) {
- char *msg = NULL;
+ const char *msg = NULL;
if (buf[4] != '\0') {
msg = &buf[4];
buf[tftp_bufsize - 1] = '\0';
- } else if (tmp < (sizeof(tftp_error_msg)
+ } else if (tmp < (sizeof(tftp_bb_error_msg)
/ sizeof(char *))) {
- msg = (char *) tftp_error_msg[tmp];
+ msg = tftp_bb_error_msg[tmp];
}
if (msg) {
- error_msg("server says: %s", msg);
+ bb_error_msg("server says: %s", msg);
}
break;
char *res;
- res = tftp_option_get(&buf[2], len-2,
+ res = tftp_option_get(&buf[2], len-2,
"blksize");
if (res) {
int blksize = atoi(res);
-
+
if (tftp_blocksize_check(blksize,
tftp_bufsize - 4)) {
opcode = TFTP_ACK;
}
#ifdef CONFIG_FEATURE_TFTP_DEBUG
- printf("using blksize %u\n", blksize);
+ fprintf(stderr, "using blksize %u\n", blksize);
#endif
tftp_bufsize = blksize + 4;
block_nr = 0;
}
/* FIXME:
* we should send ERROR 8 */
- error_msg("bad server option");
+ bb_error_msg("bad server option");
break;
}
- error_msg("warning: blksize not supported by server"
+ bb_error_msg("warning: blksize not supported by server"
" - reverting to 512");
tftp_bufsize = TFTP_BLOCKSIZE_DEFAULT + 4;
if (cmd_get && (opcode == TFTP_DATA)) {
if (tmp == block_nr) {
-
- len = write(localfd, &buf[4], len - 4);
+
+ len = bb_full_write(localfd, &buf[4], len - 4);
if (len < 0) {
- perror_msg("write");
+ bb_perror_msg("write");
break;
}
opcode = TFTP_ACK;
continue;
}
+ /* in case the last ack disappeared into the ether */
+ if ( tmp == (block_nr - 1) ) {
+ --block_nr;
+ opcode = TFTP_ACK;
+ continue;
+ } else if (tmp + 1 == block_nr) {
+ /* Server lost our TFTP_ACK. Resend it */
+ block_nr = tmp;
+ opcode = TFTP_ACK;
+ continue;
+ }
}
if (cmd_put && (opcode == TFTP_ACK)) {
- if (tmp == (block_nr - 1)) {
+ if (tmp == (unsigned short)(block_nr - 1)) {
if (finished) {
break;
}
#ifdef CONFIG_FEATURE_CLEAN_UP
close(socketfd);
- free(buf);
+ free(buf);
#endif
return finished ? EXIT_SUCCESS : EXIT_FAILURE;
int tftp_main(int argc, char **argv)
{
struct hostent *host = NULL;
- char *localfile = NULL;
- char *remotefile = NULL;
- int port = 69;
+ const char *localfile = NULL;
+ const char *remotefile = NULL;
+ int port;
int cmd = 0;
int fd = -1;
int flags = 0;
- int opt;
int result;
int blocksize = TFTP_BLOCKSIZE_DEFAULT;
/* figure out what to pass to getopt */
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
+ char *sblocksize = NULL;
#define BS "b:"
+#define BS_ARG , &sblocksize
#else
#define BS
+#define BS_ARG
#endif
#ifdef CONFIG_FEATURE_TFTP_GET
#define GET "g"
+#define GET_COMPL ":g"
#else
-#define GET
+#define GET
+#define GET_COMPL
#endif
#ifdef CONFIG_FEATURE_TFTP_PUT
#define PUT "p"
+#define PUT_COMPL ":p"
#else
-#define PUT
+#define PUT
+#define PUT_COMPL
#endif
- while ((opt = getopt(argc, argv, BS GET PUT "l:r:")) != -1) {
- switch (opt) {
+#if defined(CONFIG_FEATURE_TFTP_GET) && defined(CONFIG_FEATURE_TFTP_PUT)
+ bb_opt_complementally = GET_COMPL PUT_COMPL ":?g--p:p--g";
+#elif defined(CONFIG_FEATURE_TFTP_GET) || defined(CONFIG_FEATURE_TFTP_PUT)
+ bb_opt_complementally = GET_COMPL PUT_COMPL;
+#else
+ /* XXX: may be should #error ? */
+#endif
+
+
+ cmd = bb_getopt_ulflags(argc, argv, GET PUT "l:r:" BS,
+ &localfile, &remotefile BS_ARG);
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
- case 'b':
- blocksize = atoi(optarg);
- if (!tftp_blocksize_check(blocksize, 0)) {
- return EXIT_FAILURE;
- }
- break;
+ if(sblocksize) {
+ blocksize = atoi(sblocksize);
+ if (!tftp_blocksize_check(blocksize, 0)) {
+ return EXIT_FAILURE;
+ }
+ }
#endif
+
+ cmd &= (tftp_cmd_get | tftp_cmd_put);
#ifdef CONFIG_FEATURE_TFTP_GET
- case 'g':
- cmd = tftp_cmd_get;
- flags = O_WRONLY | O_CREAT;
- break;
+ if(cmd == tftp_cmd_get)
+ flags = O_WRONLY | O_CREAT | O_TRUNC;
#endif
#ifdef CONFIG_FEATURE_TFTP_PUT
- case 'p':
- cmd = tftp_cmd_put;
- flags = O_RDONLY;
- break;
+ if(cmd == tftp_cmd_put)
+ flags = O_RDONLY;
#endif
- case 'l':
- localfile = xstrdup(optarg);
- break;
- case 'r':
- remotefile = xstrdup(optarg);
- break;
- }
- }
- if ((cmd == 0) || (optind == argc)) {
- show_usage();
- }
- if(localfile && strcmp(localfile, "-") == 0) {
- fd = fileno((cmd==tftp_cmd_get)? stdout : stdin);
- }
if(localfile == NULL)
localfile = remotefile;
if(remotefile == NULL)
remotefile = localfile;
- if (fd==-1) {
+ /* XXX: I corrected this, but may be wrong too. vodz */
+ if(localfile==NULL || strcmp(localfile, "-") == 0) {
+ fd = fileno((cmd==tftp_cmd_get)? stdout : stdin);
+ } else if (fd==-1) {
fd = open(localfile, flags, 0644);
}
if (fd < 0) {
- perror_msg_and_die("local file");
+ bb_perror_msg_and_die("local file");
}
+ /* XXX: argv[optind] and/or argv[optind + 1] may be NULL! */
host = xgethostbyname(argv[optind]);
-
- if (optind + 2 == argc) {
- port = atoi(argv[optind + 1]);
- }
+ port = bb_lookup_port(argv[optind + 1], "udp", 69);
#ifdef CONFIG_FEATURE_TFTP_DEBUG
- printf("using server \"%s\", remotefile \"%s\", "
+ fprintf(stderr, "using server \"%s\", remotefile \"%s\", "
"localfile \"%s\".\n",
inet_ntoa(*((struct in_addr *) host->h_addr)),
remotefile, localfile);
result = tftp(cmd, host, remotefile, fd, port, blocksize);
#ifdef CONFIG_FEATURE_CLEAN_UP
- if (!(fd == fileno(stdout) || fd == fileno(stdin))) {
+ if (!(fd == STDOUT_FILENO || fd == STDIN_FILENO)) {
close(fd);
}
#endif
projects / oweals / busybox.git / blobdiff