-/* ------------------------------------------------------------------------- */
-/* tftp.c */
-/* */
-/* A simple tftp client for busybox. */
-/* Tries to follow RFC1350. */
-/* Only "octet" mode and 512-byte data blocks are supported. */
-/* */
-/* 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 */
-/* */
-/* ------------------------------------------------------------------------- */
-
-#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>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include "busybox.h"
-
-//#define BB_FEATURE_TFTP_DEBUG
-
-/* we don't need #ifdefs with these constants and optimization... */
-
-#ifdef BB_FEATURE_TFTP_GET
-#define BB_TFTP_GET (1 << 0)
+/* 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 "libbb.h"
+
+#if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT
+
+#define TFTP_BLOCKSIZE_DEFAULT 512 /* according to RFC 1350, don't change */
+#define TFTP_TIMEOUT_MS 50
+#define TFTP_MAXTIMEOUT_MS 2000
+#define TFTP_NUM_RETRIES 12 /* number of backed-off retries */
+
+/* opcodes we support */
+#define TFTP_RRQ 1
+#define TFTP_WRQ 2
+#define TFTP_DATA 3
+#define TFTP_ACK 4
+#define TFTP_ERROR 5
+#define TFTP_OACK 6
+
+#if ENABLE_FEATURE_TFTP_GET && !ENABLE_FEATURE_TFTP_PUT
+#define USE_GETPUT(...)
+#define CMD_GET(cmd) 1
+#define CMD_PUT(cmd) 0
+#elif !ENABLE_FEATURE_TFTP_GET && ENABLE_FEATURE_TFTP_PUT
+#define USE_GETPUT(...)
+#define CMD_GET(cmd) 0
+#define CMD_PUT(cmd) 1
#else
-#define BB_TFTP_GET 0
+#define USE_GETPUT(...) __VA_ARGS__
+/* masks coming from getpot32 */
+#define CMD_GET(cmd) ((cmd) & 1)
+#define CMD_PUT(cmd) ((cmd) & 2)
#endif
+/* NB: in the code below
+ * CMD_GET(cmd) and CMD_PUT(cmd) are mutually exclusive
+ */
-#ifdef BB_FEATURE_TFTP_PUT
-#define BB_TFTP_PUT (1 << 1)
-#else
-#define BB_TFTP_PUT 0
-#endif
-#ifdef BB_FEATURE_TFTP_DEBUG
-#define BB_TFTP_DEBUG 1
-#else
-#define BB_TFTP_DEBUG 0
-#endif
+#if ENABLE_FEATURE_TFTP_BLOCKSIZE
-#define BB_TFTP_NO_RETRIES 5
-#define BB_TFTP_TIMEOUT 5 /* seconds */
-
-#define RRQ 1 /* read request */
-#define WRQ 2 /* write request */
-#define DATA 3 /* data packet */
-#define ACK 4 /* acknowledgement */
-#define ERROR 5 /* error code */
-
-#define BUFSIZE (512+4)
-
-static const char *tftp_error_msg[] = {
- "Undefined error",
- "File not found",
- "Access violation",
- "Disk full or allocation error",
- "Illegal TFTP operation",
- "Unknown transfer ID",
- "File already exists",
- "No such user"
-};
-
-static inline int tftp(int cmd, struct hostent *host,
- char *serverfile, int localfd, int port)
+static int tftp_blocksize_check(int blocksize, int bufsize)
{
- struct sockaddr_in sa;
- int socketfd;
- struct timeval tv;
- fd_set rfds;
- struct sockaddr_in from;
- socklen_t fromlen;
- char *cp;
- unsigned short tmp;
- int len, opcode, finished;
- int timeout, block_nr;
-
- RESERVE_BB_BUFFER(buf, BUFSIZE);
-
- opcode = finished = timeout = 0;
- block_nr = 1;
-
- if ((socketfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
- perror_msg("socket");
- return EXIT_FAILURE;
+ /* 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))
+ || (blocksize < 8) || (blocksize > 65564)
+ ) {
+ bb_error_msg("bad blocksize");
+ return 0;
}
- len = sizeof(sa);
-
- memset(&sa, 0, len);
- bind(socketfd, &sa, len);
-
- sa.sin_family = host->h_addrtype;
- sa.sin_port = htons(port);
- memcpy(&sa.sin_addr, (struct in_addr *) host->h_addr,
- sizeof(sa.sin_addr));
-
- /* build opcode */
+ return blocksize;
+}
- if (cmd & BB_TFTP_GET) {
- opcode = RRQ;
- }
+static char *tftp_option_get(char *buf, int len, const char *option)
+{
+ int opt_val = 0;
+ int opt_found = 0;
+ int k;
+
+ while (len > 0) {
+ /* Make sure the options are terminated correctly */
+ for (k = 0; k < len; k++) {
+ if (buf[k] == '\0') {
+ goto nul_found;
+ }
+ }
+ return NULL;
+ nul_found:
+ if (opt_val == 0) {
+ if (strcasecmp(buf, option) == 0) {
+ opt_found = 1;
+ }
+ } else if (opt_found) {
+ return buf;
+ }
- if (cmd & BB_TFTP_PUT) {
- opcode = WRQ;
+ k++;
+ buf += k;
+ len -= k;
+ opt_val ^= 1;
}
- while (1) {
+ return NULL;
+}
+#endif
- /* build packet of type "opcode" */
+static int tftp( USE_GETPUT(const int cmd,)
+ len_and_sockaddr *peer_lsa,
+ const char *remotefile, const int localfd,
+ unsigned port, int tftp_bufsize)
+{
+ struct pollfd pfd[1];
+#define socketfd (pfd[0].fd)
+ int len;
+ int send_len;
+ USE_FEATURE_TFTP_BLOCKSIZE(smallint want_option_ack = 0;)
+ smallint finished = 0;
+ uint16_t opcode;
+ uint16_t block_nr = 1;
+ uint16_t recv_blk;
+ int retries, waittime_ms;
+ char *cp;
+ unsigned org_port;
+ len_and_sockaddr *const from = alloca(offsetof(len_and_sockaddr, sa) + peer_lsa->len);
- cp = buf;
+ /* Can't use RESERVE_CONFIG_BUFFER here since the allocation
+ * size varies meaning BUFFERS_GO_ON_STACK would fail */
+ /* We must keep the transmit and receive buffers seperate */
+ /* In case we rcv a garbage pkt and we need to rexmit the last pkt */
+ char *xbuf = xmalloc(tftp_bufsize += 4);
+ char *rbuf = xmalloc(tftp_bufsize);
- *((unsigned short *) cp) = htons(opcode);
+ port = org_port = htons(port);
- cp += 2;
+ socketfd = xsocket(peer_lsa->sa.sa_family, SOCK_DGRAM, 0);
- /* add filename and mode */
+ /* build opcode */
+ opcode = TFTP_WRQ;
+ if (CMD_GET(cmd)) {
+ opcode = TFTP_RRQ;
+ }
+ cp = xbuf + 2;
+ /* add filename and mode */
+ /* fill in packet if the filename fits into xbuf */
+ len = strlen(remotefile) + 1;
+ if (2 + len + sizeof("octet") >= tftp_bufsize) {
+ bb_error_msg("remote filename is too long");
+ goto ret;
+ }
+ strcpy(cp, remotefile);
+ cp += len;
+ /* add "mode" part of the package */
+ strcpy(cp, "octet");
+ cp += sizeof("octet");
+
+#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+ len = tftp_bufsize - 4; /* data block size */
+ if (len != TFTP_BLOCKSIZE_DEFAULT) {
+ /* rfc2348 says that 65464 is a max allowed value */
+ if ((&xbuf[tftp_bufsize - 1] - cp) < sizeof("blksize NNNNN")) {
+ bb_error_msg("remote filename is too long");
+ goto ret;
+ }
+ /* add "blksize", <nul>, blocksize */
+ strcpy(cp, "blksize");
+ cp += sizeof("blksize");
+ cp += snprintf(cp, 6, "%d", len) + 1;
+ want_option_ack = 1;
+ }
+#endif
+ /* First packet is built, so skip packet generation */
+ goto send_pkt;
- if ((BB_TFTP_GET && (opcode == RRQ)) ||
- (BB_TFTP_PUT && (opcode == WRQ))) {
+ /* Using mostly goto's - continue/break will be less clear
+ * in where we actually jump to */
- while (cp != &buf[BUFSIZE - 1]) {
- if ((*cp = *serverfile++) == '\0')
- break;
- cp++;
+ while (1) {
+ /* Build ACK or DATA */
+ cp = xbuf + 2;
+ *((uint16_t*)cp) = htons(block_nr);
+ cp += 2;
+ block_nr++;
+ opcode = TFTP_ACK;
+ if (CMD_PUT(cmd)) {
+ opcode = TFTP_DATA;
+ len = full_read(localfd, cp, tftp_bufsize - 4);
+ if (len < 0) {
+ bb_perror_msg(bb_msg_read_error);
+ goto ret;
}
-
- if ((*cp != '\0') || (&buf[BUFSIZE - 1] - cp) < 7) {
- error_msg("too long server-filename");
- break;
+ if (len != (tftp_bufsize - 4)) {
+ finished = 1;
}
-
- memcpy(cp + 1, "octet", 6);
- cp += 7;
+ cp += len;
}
-
- /* add ack and data */
-
- if ((BB_TFTP_GET && (opcode == ACK)) ||
- (BB_TFTP_PUT && (opcode == DATA))) {
-
- *((unsigned short *) cp) = htons(block_nr);
-
- cp += 2;
-
- block_nr++;
-
- if (BB_TFTP_PUT && (opcode == DATA)) {
- len = read(localfd, cp, BUFSIZE - 4);
-
- if (len < 0) {
- perror_msg("read");
- break;
- }
-
- if (len != (BUFSIZE - 4)) {
- finished++;
- }
-
- cp += len;
- } else if (finished) {
- break;
+ send_pkt:
+ /* Send packet */
+ *((uint16_t*)xbuf) = htons(opcode); /* fill in opcode part */
+ send_len = cp - xbuf;
+ /* NB: send_len value is preserved in code below
+ * for potential resend */
+
+ retries = TFTP_NUM_RETRIES; /* re-initialize */
+ waittime_ms = TFTP_TIMEOUT_MS;
+
+ send_again:
+#if ENABLE_DEBUG_TFTP
+ fprintf(stderr, "sending %u bytes\n", send_len);
+ for (cp = xbuf; cp < &xbuf[send_len]; cp++)
+ fprintf(stderr, "%02x ", (unsigned char) *cp);
+ fprintf(stderr, "\n");
+#endif
+ xsendto(socketfd, xbuf, send_len, &peer_lsa->sa, peer_lsa->len);
+ /* Was it final ACK? then exit */
+ if (finished && (opcode == TFTP_ACK))
+ goto ret;
+
+ recv_again:
+ /* Receive packet */
+ /*pfd[0].fd = socketfd;*/
+ pfd[0].events = POLLIN;
+ switch (safe_poll(pfd, 1, waittime_ms)) {
+ unsigned from_port;
+ case 1:
+ from->len = peer_lsa->len;
+ memset(&from->sa, 0, peer_lsa->len);
+ len = recvfrom(socketfd, rbuf, tftp_bufsize, 0,
+ &from->sa, &from->len);
+ if (len < 0) {
+ bb_perror_msg("recvfrom");
+ goto ret;
}
- }
-
-
- /* send packet */
-
-
- do {
-
- len = cp - buf;
-
- if (BB_TFTP_DEBUG) {
- printf("sending %u bytes\n", len);
-
- for (cp = buf; cp < &buf[len]; cp++)
- printf("%02x ", *cp);
- printf("\n");
+ from_port = get_nport(&from->sa);
+ if (port == org_port) {
+ /* Our first query went to port 69
+ * but reply will come from different one.
+ * Remember and use this new port */
+ port = from_port;
+ set_nport(peer_lsa, from_port);
}
-
- if (sendto(socketfd, buf, len, 0,
- (struct sockaddr *) &sa, sizeof(sa)) < 0) {
- perror_msg("send");
- len = -1;
- break;
+ if (port != from_port)
+ goto recv_again;
+ goto process_pkt;
+ case 0:
+ retries--;
+ if (retries == 0) {
+ bb_error_msg("timeout");
+ goto ret;
}
-
- /* receive packet */
-
-
- memset(&from, 0, sizeof(from));
- fromlen = sizeof(from);
-
- tv.tv_sec = BB_TFTP_TIMEOUT;
- tv.tv_usec = 0;
-
- FD_ZERO(&rfds);
- FD_SET(socketfd, &rfds);
-
- switch (select(FD_SETSIZE, &rfds, NULL, NULL, &tv)) {
- case 1:
- len = recvfrom(socketfd, buf,
- BUFSIZE, 0,
- (struct sockaddr *) &from, &fromlen);
-
- if (len < 0) {
- perror_msg("recvfrom");
- break;
- }
-
- timeout = 0;
-
- if (sa.sin_port == htons(port)) {
- sa.sin_port = from.sin_port;
- break;
- }
-
- if (sa.sin_port == from.sin_port) {
- break;
- }
-
- /* fall-through for bad packets! */
- /* discard the packet - treat as timeout */
-
- case 0:
- error_msg("timeout");
-
- if (!timeout) {
- timeout = BB_TFTP_NO_RETRIES;
- } else {
- timeout--;
- }
-
- if (!timeout) {
- len = -1;
- error_msg("last timeout");
- }
- break;
-
- default:
- perror_msg("select");
- len = -1;
+ /* exponential backoff with limit */
+ waittime_ms += waittime_ms/2;
+ if (waittime_ms > TFTP_MAXTIMEOUT_MS) {
+ waittime_ms = TFTP_MAXTIMEOUT_MS;
}
- } while (timeout && (len >= 0));
-
- if (len < 0) {
- break;
+ goto send_again; /* resend last sent pkt */
+ default:
+ /*bb_perror_msg("poll"); - done in safe_poll */
+ goto ret;
}
+ process_pkt:
+ /* Process recv'ed packet */
+ opcode = ntohs( ((uint16_t*)rbuf)[0] );
+ recv_blk = ntohs( ((uint16_t*)rbuf)[1] );
- /* process received packet */
-
-
- opcode = ntohs(*((unsigned short *) buf));
- tmp = ntohs(*((unsigned short *) &buf[2]));
+#if ENABLE_DEBUG_TFTP
+ fprintf(stderr, "received %d bytes: %04x %04x\n", len, opcode, recv_blk);
+#endif
- if (BB_TFTP_DEBUG) {
- printf("received %d bytes: %04x %04x\n", len, opcode, tmp);
+ if (opcode == TFTP_ERROR) {
+ static const char *const errcode_str[] = {
+ "",
+ "file not found",
+ "access violation",
+ "disk full",
+ "illegal TFTP operation",
+ "unknown transfer id",
+ "file already exists",
+ "no such user",
+ "bad option"
+ };
+
+ const char *msg = "";
+
+ if (rbuf[4] != '\0') {
+ msg = &rbuf[4];
+ rbuf[tftp_bufsize - 1] = '\0';
+ } else if (recv_blk < ARRAY_SIZE(errcode_str)) {
+ msg = errcode_str[recv_blk];
+ }
+ bb_error_msg("server error: (%u) %s", recv_blk, msg);
+ goto ret;
}
- if (BB_TFTP_GET && (opcode == DATA)) {
+#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+ if (want_option_ack) {
+ want_option_ack = 0;
+
+ if (opcode == TFTP_OACK) {
+ /* server seems to support options */
+ char *res;
+
+ res = tftp_option_get(&rbuf[2], len - 2, "blksize");
+ if (res) {
+ int blksize = xatoi_u(res);
+ if (!tftp_blocksize_check(blksize, tftp_bufsize - 4)) {
+ /* send ERROR 8 to server... */
+ /* htons can be impossible to use in const initializer: */
+ /*static const uint16_t error_8[2] = { htons(TFTP_ERROR), htons(8) };*/
+ /* thus we open-code big-endian layout */
+ static const uint8_t error_8[4] = { 0,TFTP_ERROR, 0,8 };
+ xsendto(socketfd, error_8, 4, &peer_lsa->sa, peer_lsa->len);
+ bb_error_msg("server proposes bad blksize %d, exiting", blksize);
+ goto ret;
+ }
+#if ENABLE_DEBUG_TFTP
+ fprintf(stderr, "using blksize %u\n",
+ blksize);
+#endif
+ tftp_bufsize = blksize + 4;
+ /* Send ACK for OACK ("block" no: 0) */
+ block_nr = 0;
+ continue;
+ }
+ /* rfc2347:
+ * "An option not acknowledged by the server
+ * must be ignored by the client and server
+ * as if it were never requested." */
+ }
- if (tmp == block_nr) {
- len = write(localfd, &buf[4], len - 4);
+ bb_error_msg("blksize is not supported by server"
+ " - reverting to 512");
+ tftp_bufsize = TFTP_BLOCKSIZE_DEFAULT + 4;
+ }
+#endif
+ /* block_nr is already advanced to next block# we expect
+ * to get / block# we are about to send next time */
+ if (CMD_GET(cmd) && (opcode == TFTP_DATA)) {
+ if (recv_blk == block_nr) {
+ len = full_write(localfd, &rbuf[4], len - 4);
if (len < 0) {
- perror_msg("write");
- break;
+ bb_perror_msg(bb_msg_write_error);
+ goto ret;
}
-
- if (len != (BUFSIZE - 4)) {
- finished++;
+ if (len != (tftp_bufsize - 4)) {
+ finished = 1;
}
-
- opcode = ACK;
- continue;
+ continue; /* send ACK */
}
- }
-
- if (BB_TFTP_PUT && (opcode == ACK)) {
-
- if (tmp == (block_nr - 1)) {
- if (finished) {
- break;
- }
-
- opcode = DATA;
+ if (recv_blk == (block_nr - 1)) {
+ /* Server lost our TFTP_ACK. Resend it */
+ block_nr = recv_blk;
continue;
}
}
- if (opcode == ERROR) {
- char *msg = NULL;
-
- if (buf[4] != '\0') {
- msg = &buf[4];
- buf[BUFSIZE - 1] = '\0';
- } else if (tmp < (sizeof(tftp_error_msg) / sizeof(char *))) {
- msg = (char *) tftp_error_msg[tmp];
- }
-
- if (msg) {
- error_msg("server says: %s", msg);
+ if (CMD_PUT(cmd) && (opcode == TFTP_ACK)) {
+ /* did server ACK our last DATA pkt? */
+ if (recv_blk == (uint16_t) (block_nr - 1)) {
+ if (finished)
+ goto ret;
+ continue; /* send next block */
}
-
- break;
}
+ /* Awww... recv'd packet is not recognized! */
+ goto recv_again;
+ /* why recv_again? - rfc1123 says:
+ * "The sender (i.e., the side originating the DATA packets)
+ * must never resend the current DATA packet on receipt
+ * of a duplicate ACK".
+ * DATA pkts are resent ONLY on timeout.
+ * Thus "goto send_again" will ba a bad mistake above.
+ * See:
+ * http://en.wikipedia.org/wiki/Sorcerer's_Apprentice_Syndrome
+ */
}
-
- close(socketfd);
-
- return finished ? EXIT_SUCCESS : EXIT_FAILURE;
+ ret:
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(socketfd);
+ free(xbuf);
+ free(rbuf);
+ }
+ return finished == 0; /* returns 1 on failure */
}
+int tftp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int tftp_main(int argc, char **argv)
{
- char *cp, *s;
- char *serverstr;
- struct hostent *host;
- char *serverfile;
- char *localfile;
- int cmd, flags, fd, bad;
-
- host = (void *) serverstr = serverfile = localfile = NULL;
- flags = cmd = 0;
- bad = 1;
-
- if (argc > 3) {
- if (BB_TFTP_GET && (strcmp(argv[1], "get") == 0)) {
- cmd = BB_TFTP_GET;
- flags = O_WRONLY | O_CREAT;
- serverstr = argv[2];
- localfile = argv[3];
- }
-
- if (BB_TFTP_PUT && (strcmp(argv[1], "put") == 0)) {
- cmd = BB_TFTP_PUT;
- flags = O_RDONLY;
- localfile = argv[2];
- serverstr = argv[3];
+ len_and_sockaddr *peer_lsa;
+ const char *localfile = NULL;
+ const char *remotefile = NULL;
+#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+ const char *sblocksize = NULL;
+#endif
+ int port;
+ USE_GETPUT(int cmd;)
+ int fd = -1;
+ int flags = 0;
+ int result;
+ int blocksize = TFTP_BLOCKSIZE_DEFAULT;
+
+ /* -p or -g is mandatory, and they are mutually exclusive */
+ opt_complementary = "" USE_FEATURE_TFTP_GET("g:") USE_FEATURE_TFTP_PUT("p:")
+ USE_GETPUT("?g--p:p--g");
+
+ USE_GETPUT(cmd =) getopt32(argv,
+ USE_FEATURE_TFTP_GET("g") USE_FEATURE_TFTP_PUT("p")
+ "l:r:" USE_FEATURE_TFTP_BLOCKSIZE("b:"),
+ &localfile, &remotefile
+ USE_FEATURE_TFTP_BLOCKSIZE(, &sblocksize));
+ argv += optind;
+
+ flags = O_RDONLY;
+ if (CMD_GET(cmd))
+ flags = O_WRONLY | O_CREAT | O_TRUNC;
+
+#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+ if (sblocksize) {
+ blocksize = xatoi_u(sblocksize);
+ if (!tftp_blocksize_check(blocksize, 0)) {
+ return EXIT_FAILURE;
}
-
}
+#endif
- if (!(cmd & (BB_TFTP_GET | BB_TFTP_PUT))) {
- show_usage();
+ if (!localfile)
+ localfile = remotefile;
+ if (!remotefile)
+ remotefile = localfile;
+ /* Error if filename or host is not known */
+ if (!remotefile || !argv[0])
+ bb_show_usage();
+
+ fd = CMD_GET(cmd) ? STDOUT_FILENO : STDIN_FILENO;
+ if (!LONE_DASH(localfile)) {
+ fd = xopen(localfile, flags);
}
- for (cp = serverstr; *cp != '\0'; cp++)
- if (*cp == ':')
- break;
-
- if (*cp == ':') {
-
- serverfile = cp + 1;
+ port = bb_lookup_port(argv[1], "udp", 69);
+ peer_lsa = xhost2sockaddr(argv[0], port);
- s = xstrdup(serverstr);
- s[cp - serverstr] = '\0';
-
- if ((host = gethostbyname(s))) {
- bad = 0;
- }
-
- free(s);
- }
- if (bad) {
- error_msg_and_die("bad \"server:file\" combination");
- }
+#if ENABLE_DEBUG_TFTP
+ fprintf(stderr, "using server '%s', remotefile '%s', localfile '%s'\n",
+ xmalloc_sockaddr2dotted(&peer_lsa->sa),
+ remotefile, localfile);
+#endif
- if (BB_TFTP_DEBUG) {
- printf("using server \"%s\", serverfile \"%s\","
- "localfile \"%s\".\n",
- inet_ntoa(*((struct in_addr *) host->h_addr)),
- serverfile, localfile);
- }
+ result = tftp( USE_GETPUT(cmd,) peer_lsa, remotefile, fd, port, blocksize);
- if ((fd = open(localfile, flags, 0644)) < 0) {
- perror_msg_and_die("local file");
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(fd);
+ if (result != EXIT_SUCCESS && !LONE_DASH(localfile) && CMD_GET(cmd)) {
+ unlink(localfile);
}
-
- flags = tftp(cmd, host, serverfile, fd, 69);
-
- close(fd);
-
- return flags;
+ return result;
}
+
+#endif /* ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT */
projects / oweals / busybox.git / blobdiff