//usage: "[OPTIONS] HOST [PORT]"
//usage:#define tftp_full_usage "\n\n"
//usage: "Transfer a file from/to tftp server\n"
-//usage: "\nOptions:"
//usage: "\n -l FILE Local FILE"
//usage: "\n -r FILE Remote FILE"
//usage: IF_FEATURE_TFTP_GET(
//usage: "\n"
//usage: "tftpd should be used as an inetd service.\n"
//usage: "tftpd's line for inetd.conf:\n"
-//usage: " 69 dgram udp nowait root tftpd tftpd /files/to/serve\n"
+//usage: " 69 dgram udp nowait root tftpd tftpd -l /files/to/serve\n"
//usage: "It also can be ran from udpsvd:\n"
//usage: " udpsvd -vE 0.0.0.0 69 tftpd /files/to/serve\n"
-//usage: "\nOptions:"
//usage: "\n -r Prohibit upload"
//usage: "\n -c Allow file creation via upload"
//usage: "\n -u Access files as USER"
+//usage: "\n -l Log to syslog (inetd mode requires this)"
#include "libbb.h"
+#include <syslog.h>
#if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT
TFTPD_OPT_r = (1 << 8) * ENABLE_TFTPD,
TFTPD_OPT_c = (1 << 9) * ENABLE_TFTPD,
TFTPD_OPT_u = (1 << 10) * ENABLE_TFTPD,
+ TFTPD_OPT_l = (1 << 11) * ENABLE_TFTPD,
};
#if ENABLE_FEATURE_TFTP_GET && !ENABLE_FEATURE_TFTP_PUT
struct globals {
/* u16 TFTP_ERROR; u16 reason; both network-endian, then error text: */
uint8_t error_pkt[4 + 32];
- char *user_opt;
+ struct passwd *pw;
/* used in tftpd_main(), a bit big for stack: */
char block_buf[TFTP_BLKSIZE_DEFAULT];
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
struct BUG_G_too_big {
char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
};
-#define block_buf (G.block_buf )
-#define user_opt (G.user_opt )
-#define error_pkt (G.error_pkt )
#define INIT_G() do { } while (0)
-#define error_pkt_reason (error_pkt[3])
-#define error_pkt_str (error_pkt + 4)
+#define G_error_pkt_reason (G.error_pkt[3])
+#define G_error_pkt_str ((char*)(G.error_pkt + 4))
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
static void tftp_progress_update(void)
xconnect(socket_fd, &peer_lsa->u.sa, peer_lsa->len);
/* Is there an error already? Send pkt and bail out */
- if (error_pkt_reason || error_pkt_str[0])
+ if (G_error_pkt_reason || G_error_pkt_str[0])
goto send_err_pkt;
- if (user_opt) {
- struct passwd *pw = xgetpwnam(user_opt);
- change_identity(pw); /* initgroups, setgid, setuid */
+ if (G.pw) {
+ change_identity(G.pw); /* initgroups, setgid, setuid */
}
}
/* Open file (must be after changing user) */
local_fd = open(local_file, open_mode, 0666);
if (local_fd < 0) {
- error_pkt_reason = ERR_NOFILE;
- strcpy((char*)error_pkt_str, "can't open file");
+ G_error_pkt_reason = ERR_NOFILE;
+ strcpy(G_error_pkt_str, "can't open file");
goto send_err_pkt;
}
/* gcc 4.3.1 would NOT optimize it out as it should! */
finished = 1;
}
cp += len;
+ IF_FEATURE_TFTP_PROGRESS_BAR(G.pos += len;)
}
send_pkt:
/* Send packet */
xsendto(socket_fd, xbuf, send_len, &peer_lsa->u.sa, peer_lsa->len);
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
- if (ENABLE_TFTP && remote_file) /* tftp */
- G.pos = (block_nr - 1) * (uoff_t)blksize;
if (is_bb_progress_inited(&G.pmt))
tftp_progress_update();
#endif
if (res) {
blksize = tftp_blksize_check(res, blksize);
if (blksize < 0) {
- error_pkt_reason = ERR_BAD_OPT;
+ G_error_pkt_reason = ERR_BAD_OPT;
goto send_err_pkt;
}
io_bufsize = blksize + 4;
if (recv_blk == block_nr) {
int sz = full_write(local_fd, &rbuf[4], len - 4);
if (sz != len - 4) {
- strcpy((char*)error_pkt_str, bb_msg_write_error);
- error_pkt_reason = ERR_WRITE;
+ strcpy(G_error_pkt_str, bb_msg_write_error);
+ G_error_pkt_reason = ERR_WRITE;
goto send_err_pkt;
}
if (sz != blksize) {
finished = 1;
}
+ IF_FEATURE_TFTP_PROGRESS_BAR(G.pos += sz;)
continue; /* send ACK */
}
/* Disabled to cope with servers with Sorcerer's Apprentice Syndrome */
return finished == 0; /* returns 1 on failure */
send_read_err_pkt:
- strcpy((char*)error_pkt_str, bb_msg_read_error);
+ strcpy(G_error_pkt_str, bb_msg_read_error);
send_err_pkt:
- if (error_pkt_str[0])
- bb_error_msg("%s", (char*)error_pkt_str);
- error_pkt[1] = TFTP_ERROR;
- xsendto(socket_fd, error_pkt, 4 + 1 + strlen((char*)error_pkt_str),
+ if (G_error_pkt_str[0])
+ bb_error_msg("%s", G_error_pkt_str);
+ G.error_pkt[1] = TFTP_ERROR;
+ xsendto(socket_fd, G.error_pkt, 4 + 1 + strlen(G_error_pkt_str),
&peer_lsa->u.sa, peer_lsa->len);
return EXIT_FAILURE;
#undef remote_file
{
len_and_sockaddr *our_lsa;
len_and_sockaddr *peer_lsa;
- char *local_file, *mode;
+ char *local_file, *mode, *user_opt;
const char *error_msg;
int opt, result, opcode;
IF_FEATURE_TFTP_BLOCKSIZE(int blksize = TFTP_BLKSIZE_DEFAULT;)
peer_lsa->len = our_lsa->len;
/* Shifting to not collide with TFTP_OPTs */
- opt = option_mask32 = TFTPD_OPT | (getopt32(argv, "rcu:", &user_opt) << 8);
+ opt = option_mask32 = TFTPD_OPT | (getopt32(argv, "rcu:l", &user_opt) << 8);
argv += optind;
- if (argv[0])
- xchdir(argv[0]);
+ if (opt & TFTPD_OPT_l) {
+ openlog(applet_name, LOG_PID, LOG_DAEMON);
+ logmode = LOGMODE_SYSLOG;
+ }
+ if (opt & TFTPD_OPT_u) {
+ /* Must be before xchroot */
+ G.pw = xgetpwnam(user_opt);
+ }
+ if (argv[0]) {
+ xchroot(argv[0]);
+ }
- result = recv_from_to(STDIN_FILENO, block_buf, sizeof(block_buf),
+ result = recv_from_to(STDIN_FILENO, G.block_buf, sizeof(G.block_buf),
0 /* flags */,
&peer_lsa->u.sa, &our_lsa->u.sa, our_lsa->len);
error_msg = "malformed packet";
- opcode = ntohs(*(uint16_t*)block_buf);
- if (result < 4 || result >= sizeof(block_buf)
- || block_buf[result-1] != '\0'
+ opcode = ntohs(*(uint16_t*)G.block_buf);
+ if (result < 4 || result >= sizeof(G.block_buf)
+ || G.block_buf[result-1] != '\0'
|| (IF_FEATURE_TFTP_PUT(opcode != TFTP_RRQ) /* not download */
IF_GETPUT(&&)
IF_FEATURE_TFTP_GET(opcode != TFTP_WRQ) /* not upload */
) {
goto err;
}
- local_file = block_buf + 2;
+ local_file = G.block_buf + 2;
if (local_file[0] == '.' || strstr(local_file, "/.")) {
error_msg = "dot in file name";
goto err;
}
mode = local_file + strlen(local_file) + 1;
- if (mode >= block_buf + result || strcmp(mode, "octet") != 0) {
+ /* RFC 1350 says mode string is case independent */
+ if (mode >= G.block_buf + result || strcasecmp(mode, "octet") != 0) {
goto err;
}
# if ENABLE_FEATURE_TFTP_BLOCKSIZE
{
char *res;
char *opt_str = mode + sizeof("octet");
- int opt_len = block_buf + result - opt_str;
+ int opt_len = G.block_buf + result - opt_str;
if (opt_len > 0) {
res = tftp_get_option("blksize", opt_str, opt_len);
if (res) {
blksize = tftp_blksize_check(res, 65564);
if (blksize < 0) {
- error_pkt_reason = ERR_BAD_OPT;
+ G_error_pkt_reason = ERR_BAD_OPT;
/* will just send error pkt */
goto do_proto;
}
if (!ENABLE_FEATURE_TFTP_PUT || opcode == TFTP_WRQ) {
if (opt & TFTPD_OPT_r) {
/* This would mean "disk full" - not true */
- /*error_pkt_reason = ERR_WRITE;*/
+ /*G_error_pkt_reason = ERR_WRITE;*/
error_msg = bb_msg_write_error;
goto err;
}
IF_GETPUT(option_mask32 |= TFTP_OPT_PUT;) /* will send file's data */
}
- /* NB: if error_pkt_str or error_pkt_reason is set up,
+ /* NB: if G_error_pkt_str or G_error_pkt_reason is set up,
* tftp_protocol() just sends one error pkt and returns */
do_proto:
return result;
err:
- strcpy((char*)error_pkt_str, error_msg);
+ strcpy(G_error_pkt_str, error_msg);
goto do_proto;
}
projects / oweals / busybox.git / blobdiff