Bernhard Reutner-Fischer | dac7ff1 | 2006-04-12 17:55:51 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Denys Vlasenko | bac9f03 | 2009-07-25 01:56:23 +0200 | [diff] [blame] | 2 | /* |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 3 | * A simple tftp client/server for busybox. |
Bernhard Reutner-Fischer | dac7ff1 | 2006-04-12 17:55:51 +0000 | [diff] [blame] | 4 | * Tries to follow RFC1350. |
| 5 | * Only "octet" mode supported. |
| 6 | * Optional blocksize negotiation (RFC2347 + RFC2348) |
| 7 | * |
| 8 | * Copyright (C) 2001 Magnus Damm <damm@opensource.se> |
| 9 | * |
| 10 | * Parts of the code based on: |
| 11 | * |
| 12 | * atftp: Copyright (C) 2000 Jean-Pierre Lefebvre <helix@step.polymtl.ca> |
| 13 | * and Remi Lefebvre <remi@debian.org> |
| 14 | * |
| 15 | * utftp: Copyright (C) 1999 Uwe Ohse <uwe@ohse.de> |
| 16 | * |
Denis Vlasenko | 78c5656 | 2008-03-18 00:11:46 +0000 | [diff] [blame] | 17 | * tftpd added by Denys Vlasenko & Vladimir Dronnikov |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 18 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 19 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Denys Vlasenko | bac9f03 | 2009-07-25 01:56:23 +0200 | [diff] [blame] | 20 | */ |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 21 | |
| 22 | //usage:#define tftp_trivial_usage |
| 23 | //usage: "[OPTIONS] HOST [PORT]" |
| 24 | //usage:#define tftp_full_usage "\n\n" |
| 25 | //usage: "Transfer a file from/to tftp server\n" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 26 | //usage: "\n -l FILE Local FILE" |
| 27 | //usage: "\n -r FILE Remote FILE" |
| 28 | //usage: IF_FEATURE_TFTP_GET( |
| 29 | //usage: "\n -g Get file" |
| 30 | //usage: ) |
| 31 | //usage: IF_FEATURE_TFTP_PUT( |
| 32 | //usage: "\n -p Put file" |
| 33 | //usage: ) |
| 34 | //usage: IF_FEATURE_TFTP_BLOCKSIZE( |
| 35 | //usage: "\n -b SIZE Transfer blocks of SIZE octets" |
| 36 | //usage: ) |
| 37 | //usage: |
| 38 | //usage:#define tftpd_trivial_usage |
| 39 | //usage: "[-cr] [-u USER] [DIR]" |
| 40 | //usage:#define tftpd_full_usage "\n\n" |
| 41 | //usage: "Transfer a file on tftp client's request\n" |
| 42 | //usage: "\n" |
| 43 | //usage: "tftpd should be used as an inetd service.\n" |
| 44 | //usage: "tftpd's line for inetd.conf:\n" |
Denys Vlasenko | 532e961 | 2011-04-11 05:12:53 +0200 | [diff] [blame] | 45 | //usage: " 69 dgram udp nowait root tftpd tftpd -l /files/to/serve\n" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 46 | //usage: "It also can be ran from udpsvd:\n" |
| 47 | //usage: " udpsvd -vE 0.0.0.0 69 tftpd /files/to/serve\n" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 48 | //usage: "\n -r Prohibit upload" |
| 49 | //usage: "\n -c Allow file creation via upload" |
| 50 | //usage: "\n -u Access files as USER" |
Denys Vlasenko | 532e961 | 2011-04-11 05:12:53 +0200 | [diff] [blame] | 51 | //usage: "\n -l Log to syslog (inetd mode requires this)" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 52 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 53 | #include "libbb.h" |
Denys Vlasenko | 88d3cfd | 2011-04-11 05:24:58 +0200 | [diff] [blame] | 54 | #include <syslog.h> |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 55 | |
Denis Vlasenko | 3163555 | 2007-01-20 16:54:19 +0000 | [diff] [blame] | 56 | #if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT |
| 57 | |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 58 | #define TFTP_BLKSIZE_DEFAULT 512 /* according to RFC 1350, don't change */ |
| 59 | #define TFTP_BLKSIZE_DEFAULT_STR "512" |
Denys Vlasenko | 5b1dfe6 | 2010-06-18 02:47:27 +0200 | [diff] [blame] | 60 | /* Was 50 ms but users asked to bump it up a bit */ |
| 61 | #define TFTP_TIMEOUT_MS 100 |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 62 | #define TFTP_MAXTIMEOUT_MS 2000 |
| 63 | #define TFTP_NUM_RETRIES 12 /* number of backed-off retries */ |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 64 | |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 65 | /* opcodes we support */ |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 66 | #define TFTP_RRQ 1 |
| 67 | #define TFTP_WRQ 2 |
| 68 | #define TFTP_DATA 3 |
| 69 | #define TFTP_ACK 4 |
| 70 | #define TFTP_ERROR 5 |
| 71 | #define TFTP_OACK 6 |
| 72 | |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 73 | /* error codes sent over network (we use only 0, 1, 3 and 8) */ |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 74 | /* generic (error message is included in the packet) */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 75 | #define ERR_UNSPEC 0 |
| 76 | #define ERR_NOFILE 1 |
| 77 | #define ERR_ACCESS 2 |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 78 | /* disk full or allocation exceeded */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 79 | #define ERR_WRITE 3 |
| 80 | #define ERR_OP 4 |
| 81 | #define ERR_BAD_ID 5 |
| 82 | #define ERR_EXIST 6 |
| 83 | #define ERR_BAD_USER 7 |
| 84 | #define ERR_BAD_OPT 8 |
| 85 | |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 86 | /* masks coming from getopt32 */ |
| 87 | enum { |
| 88 | TFTP_OPT_GET = (1 << 0), |
| 89 | TFTP_OPT_PUT = (1 << 1), |
| 90 | /* pseudo option: if set, it's tftpd */ |
| 91 | TFTPD_OPT = (1 << 7) * ENABLE_TFTPD, |
| 92 | TFTPD_OPT_r = (1 << 8) * ENABLE_TFTPD, |
| 93 | TFTPD_OPT_c = (1 << 9) * ENABLE_TFTPD, |
| 94 | TFTPD_OPT_u = (1 << 10) * ENABLE_TFTPD, |
Denys Vlasenko | 532e961 | 2011-04-11 05:12:53 +0200 | [diff] [blame] | 95 | TFTPD_OPT_l = (1 << 11) * ENABLE_TFTPD, |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 96 | }; |
| 97 | |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 98 | #if ENABLE_FEATURE_TFTP_GET && !ENABLE_FEATURE_TFTP_PUT |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 99 | #define IF_GETPUT(...) |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 100 | #define CMD_GET(cmd) 1 |
| 101 | #define CMD_PUT(cmd) 0 |
| 102 | #elif !ENABLE_FEATURE_TFTP_GET && ENABLE_FEATURE_TFTP_PUT |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 103 | #define IF_GETPUT(...) |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 104 | #define CMD_GET(cmd) 0 |
| 105 | #define CMD_PUT(cmd) 1 |
"Vladimir N. Oleynik" | 86ac072 | 2005-10-17 10:47:19 +0000 | [diff] [blame] | 106 | #else |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 107 | #define IF_GETPUT(...) __VA_ARGS__ |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 108 | #define CMD_GET(cmd) ((cmd) & TFTP_OPT_GET) |
| 109 | #define CMD_PUT(cmd) ((cmd) & TFTP_OPT_PUT) |
"Vladimir N. Oleynik" | 86ac072 | 2005-10-17 10:47:19 +0000 | [diff] [blame] | 110 | #endif |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 111 | /* NB: in the code below |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 112 | * CMD_GET(cmd) and CMD_PUT(cmd) are mutually exclusive |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 113 | */ |
"Vladimir N. Oleynik" | 86ac072 | 2005-10-17 10:47:19 +0000 | [diff] [blame] | 114 | |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 115 | |
| 116 | struct globals { |
| 117 | /* u16 TFTP_ERROR; u16 reason; both network-endian, then error text: */ |
| 118 | uint8_t error_pkt[4 + 32]; |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 119 | struct passwd *pw; |
Denys Vlasenko | 4eb1e42 | 2014-09-04 12:24:03 +0200 | [diff] [blame] | 120 | /* Used in tftpd_main() for initial packet */ |
| 121 | /* Some HP PA-RISC firmware always sends fixed 516-byte requests */ |
| 122 | char block_buf[516]; |
Denys Vlasenko | 67e01fe | 2014-09-03 18:35:38 +0200 | [diff] [blame] | 123 | char block_buf_tail[1]; |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 124 | #if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
| 125 | off_t pos; |
| 126 | off_t size; |
| 127 | const char *file; |
| 128 | bb_progress_t pmt; |
| 129 | #endif |
Denys Vlasenko | 98a4c7c | 2010-02-04 15:00:15 +0100 | [diff] [blame] | 130 | } FIX_ALIASING; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 131 | #define G (*(struct globals*)&bb_common_bufsiz1) |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 132 | struct BUG_G_too_big { |
| 133 | char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1]; |
| 134 | }; |
Denis Vlasenko | 7049ff8 | 2008-06-25 09:53:17 +0000 | [diff] [blame] | 135 | #define INIT_G() do { } while (0) |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 136 | |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 137 | #define G_error_pkt_reason (G.error_pkt[3]) |
| 138 | #define G_error_pkt_str ((char*)(G.error_pkt + 4)) |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 139 | |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 140 | #if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 141 | static void tftp_progress_update(void) |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 142 | { |
Denys Vlasenko | d55e139 | 2011-02-11 18:56:13 +0100 | [diff] [blame] | 143 | bb_progress_update(&G.pmt, 0, G.pos, G.size); |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 144 | } |
Denys Vlasenko | adc08ef | 2009-11-08 18:07:36 +0100 | [diff] [blame] | 145 | static void tftp_progress_init(void) |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 146 | { |
Denys Vlasenko | d55e139 | 2011-02-11 18:56:13 +0100 | [diff] [blame] | 147 | bb_progress_init(&G.pmt, G.file); |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 148 | tftp_progress_update(); |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 149 | } |
| 150 | static void tftp_progress_done(void) |
| 151 | { |
Denys Vlasenko | d55e139 | 2011-02-11 18:56:13 +0100 | [diff] [blame] | 152 | if (is_bb_progress_inited(&G.pmt)) { |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 153 | tftp_progress_update(); |
| 154 | bb_putchar_stderr('\n'); |
Denys Vlasenko | ab8d00d | 2011-02-11 19:09:30 +0100 | [diff] [blame] | 155 | bb_progress_free(&G.pmt); |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 156 | } |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 157 | } |
| 158 | #else |
Denys Vlasenko | adc08ef | 2009-11-08 18:07:36 +0100 | [diff] [blame] | 159 | # define tftp_progress_init() ((void)0) |
| 160 | # define tftp_progress_done() ((void)0) |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 161 | #endif |
Eric Andersen | 76fa8ea | 2001-08-20 17:47:49 +0000 | [diff] [blame] | 162 | |
Denis Vlasenko | 04291bc | 2006-11-21 10:15:25 +0000 | [diff] [blame] | 163 | #if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 164 | |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 165 | static int tftp_blksize_check(const char *blksize_str, int maxsize) |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 166 | { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 167 | /* Check if the blksize is valid: |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 168 | * RFC2348 says between 8 and 65464, |
| 169 | * but our implementation makes it impossible |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 170 | * to use blksizes smaller than 22 octets. */ |
| 171 | unsigned blksize = bb_strtou(blksize_str, NULL, 10); |
| 172 | if (errno |
| 173 | || (blksize < 24) || (blksize > maxsize) |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 174 | ) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 175 | bb_error_msg("bad blocksize '%s'", blksize_str); |
| 176 | return -1; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 177 | } |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 178 | # if ENABLE_TFTP_DEBUG |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 179 | bb_error_msg("using blksize %u", blksize); |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 180 | # endif |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 181 | return blksize; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 182 | } |
| 183 | |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 184 | static char *tftp_get_option(const char *option, char *buf, int len) |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 185 | { |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 186 | int opt_val = 0; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 187 | int opt_found = 0; |
| 188 | int k; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 189 | |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 190 | /* buf points to: |
| 191 | * "opt_name<NUL>opt_val<NUL>opt_name2<NUL>opt_val2<NUL>..." */ |
| 192 | |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 193 | while (len > 0) { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 194 | /* Make sure options are terminated correctly */ |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 195 | for (k = 0; k < len; k++) { |
| 196 | if (buf[k] == '\0') { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 197 | goto nul_found; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 198 | } |
| 199 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 200 | return NULL; |
| 201 | nul_found: |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 202 | if (opt_val == 0) { /* it's "name" part */ |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 203 | if (strcasecmp(buf, option) == 0) { |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 204 | opt_found = 1; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 205 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 206 | } else if (opt_found) { |
| 207 | return buf; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 208 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 209 | |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 210 | k++; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 211 | buf += k; |
| 212 | len -= k; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 213 | opt_val ^= 1; |
| 214 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 215 | |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 216 | return NULL; |
| 217 | } |
| 218 | |
| 219 | #endif |
| 220 | |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 221 | static int tftp_protocol( |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 222 | /* NULL if tftp, !NULL if tftpd: */ |
| 223 | len_and_sockaddr *our_lsa, |
Denis Vlasenko | 0850cda | 2007-02-07 23:20:32 +0000 | [diff] [blame] | 224 | len_and_sockaddr *peer_lsa, |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 225 | const char *local_file |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 226 | IF_TFTP(, const char *remote_file) |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 227 | #if !ENABLE_TFTP |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 228 | # define remote_file NULL |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 229 | #endif |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 230 | /* 1 for tftp; 1/0 for tftpd depending whether client asked about it: */ |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 231 | IF_FEATURE_TFTP_BLOCKSIZE(, int want_transfer_size) |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 232 | IF_FEATURE_TFTP_BLOCKSIZE(, int blksize)) |
| 233 | { |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 234 | #if !ENABLE_FEATURE_TFTP_BLOCKSIZE |
| 235 | enum { blksize = TFTP_BLKSIZE_DEFAULT }; |
| 236 | #endif |
| 237 | |
Denis Vlasenko | 87f3b26 | 2007-09-07 13:43:28 +0000 | [diff] [blame] | 238 | struct pollfd pfd[1]; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 239 | #define socket_fd (pfd[0].fd) |
Bernhard Reutner-Fischer | 62f9856 | 2006-06-10 14:32:56 +0000 | [diff] [blame] | 240 | int len; |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 241 | int send_len; |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 242 | IF_FEATURE_TFTP_BLOCKSIZE(smallint expect_OACK = 0;) |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 243 | smallint finished = 0; |
| 244 | uint16_t opcode; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 245 | uint16_t block_nr; |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 246 | uint16_t recv_blk; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 247 | int open_mode, local_fd; |
Denis Vlasenko | 87f3b26 | 2007-09-07 13:43:28 +0000 | [diff] [blame] | 248 | int retries, waittime_ms; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 249 | int io_bufsize = blksize + 4; |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 250 | char *cp; |
Eric Andersen | 744a194 | 2001-11-10 11:16:39 +0000 | [diff] [blame] | 251 | /* Can't use RESERVE_CONFIG_BUFFER here since the allocation |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 252 | * size varies meaning BUFFERS_GO_ON_STACK would fail. |
| 253 | * |
Denys Vlasenko | 5370bfb | 2009-09-06 02:58:59 +0200 | [diff] [blame] | 254 | * We must keep the transmit and receive buffers separate |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 255 | * in case we rcv a garbage pkt - we need to rexmit the last pkt. |
| 256 | */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 257 | char *xbuf = xmalloc(io_bufsize); |
| 258 | char *rbuf = xmalloc(io_bufsize); |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 259 | |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 260 | socket_fd = xsocket(peer_lsa->u.sa.sa_family, SOCK_DGRAM, 0); |
| 261 | setsockopt_reuseaddr(socket_fd); |
Denis Vlasenko | 6536a9b | 2007-01-12 10:35:23 +0000 | [diff] [blame] | 262 | |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 263 | if (!ENABLE_TFTP || our_lsa) { /* tftpd */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 264 | /* Create a socket which is: |
| 265 | * 1. bound to IP:port peer sent 1st datagram to, |
| 266 | * 2. connected to peer's IP:port |
| 267 | * This way we will answer from the IP:port peer |
| 268 | * expects, will not get any other packets on |
| 269 | * the socket, and also plain read/write will work. */ |
| 270 | xbind(socket_fd, &our_lsa->u.sa, our_lsa->len); |
| 271 | xconnect(socket_fd, &peer_lsa->u.sa, peer_lsa->len); |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 272 | |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 273 | /* Is there an error already? Send pkt and bail out */ |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 274 | if (G_error_pkt_reason || G_error_pkt_str[0]) |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 275 | goto send_err_pkt; |
| 276 | |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 277 | if (G.pw) { |
| 278 | change_identity(G.pw); /* initgroups, setgid, setuid */ |
Denis Vlasenko | 7a60133 | 2008-03-19 13:24:13 +0000 | [diff] [blame] | 279 | } |
| 280 | } |
| 281 | |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 282 | /* Prepare open mode */ |
Denis Vlasenko | 7a60133 | 2008-03-19 13:24:13 +0000 | [diff] [blame] | 283 | if (CMD_PUT(option_mask32)) { |
| 284 | open_mode = O_RDONLY; |
| 285 | } else { |
| 286 | open_mode = O_WRONLY | O_TRUNC | O_CREAT; |
| 287 | #if ENABLE_TFTPD |
| 288 | if ((option_mask32 & (TFTPD_OPT+TFTPD_OPT_c)) == TFTPD_OPT) { |
| 289 | /* tftpd without -c */ |
| 290 | open_mode = O_WRONLY | O_TRUNC; |
| 291 | } |
| 292 | #endif |
| 293 | } |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 294 | |
Denys Vlasenko | bac9f03 | 2009-07-25 01:56:23 +0200 | [diff] [blame] | 295 | /* Examples of network traffic. |
| 296 | * Note two cases when ACKs with block# of 0 are sent. |
| 297 | * |
| 298 | * Download without options: |
| 299 | * tftp -> "\0\1FILENAME\0octet\0" |
| 300 | * "\0\3\0\1FILEDATA..." <- tftpd |
| 301 | * tftp -> "\0\4\0\1" |
| 302 | * ... |
| 303 | * Download with option of blksize 16384: |
| 304 | * tftp -> "\0\1FILENAME\0octet\0blksize\00016384\0" |
| 305 | * "\0\6blksize\00016384\0" <- tftpd |
| 306 | * tftp -> "\0\4\0\0" |
| 307 | * "\0\3\0\1FILEDATA..." <- tftpd |
| 308 | * tftp -> "\0\4\0\1" |
| 309 | * ... |
| 310 | * Upload without options: |
| 311 | * tftp -> "\0\2FILENAME\0octet\0" |
| 312 | * "\0\4\0\0" <- tftpd |
| 313 | * tftp -> "\0\3\0\1FILEDATA..." |
| 314 | * "\0\4\0\1" <- tftpd |
| 315 | * ... |
| 316 | * Upload with option of blksize 16384: |
| 317 | * tftp -> "\0\2FILENAME\0octet\0blksize\00016384\0" |
| 318 | * "\0\6blksize\00016384\0" <- tftpd |
| 319 | * tftp -> "\0\3\0\1FILEDATA..." |
| 320 | * "\0\4\0\1" <- tftpd |
| 321 | * ... |
| 322 | */ |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 323 | block_nr = 1; |
| 324 | cp = xbuf + 2; |
| 325 | |
| 326 | if (!ENABLE_TFTP || our_lsa) { /* tftpd */ |
| 327 | /* Open file (must be after changing user) */ |
Denys Vlasenko | 4b06146 | 2010-02-02 01:01:40 +0100 | [diff] [blame] | 328 | local_fd = open(local_file, open_mode, 0666); |
Denis Vlasenko | 7a60133 | 2008-03-19 13:24:13 +0000 | [diff] [blame] | 329 | if (local_fd < 0) { |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 330 | G_error_pkt_reason = ERR_NOFILE; |
| 331 | strcpy(G_error_pkt_str, "can't open file"); |
Denis Vlasenko | 7a60133 | 2008-03-19 13:24:13 +0000 | [diff] [blame] | 332 | goto send_err_pkt; |
| 333 | } |
Denis Vlasenko | 31e1286 | 2008-06-16 07:32:40 +0000 | [diff] [blame] | 334 | /* gcc 4.3.1 would NOT optimize it out as it should! */ |
| 335 | #if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 336 | if (blksize != TFTP_BLKSIZE_DEFAULT || want_transfer_size) { |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 337 | /* Create and send OACK packet. */ |
| 338 | /* For the download case, block_nr is still 1 - |
| 339 | * we expect 1st ACK from peer to be for (block_nr-1), |
| 340 | * that is, for "block 0" which is our OACK pkt */ |
| 341 | opcode = TFTP_OACK; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 342 | goto add_blksize_opt; |
| 343 | } |
Denis Vlasenko | 31e1286 | 2008-06-16 07:32:40 +0000 | [diff] [blame] | 344 | #endif |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 345 | if (CMD_GET(option_mask32)) { |
| 346 | /* It's upload and we don't send OACK. |
| 347 | * We must ACK 1st packet (with filename) |
| 348 | * as if it is "block 0" */ |
| 349 | block_nr = 0; |
| 350 | } |
| 351 | |
| 352 | } else { /* tftp */ |
| 353 | /* Open file (must be after changing user) */ |
| 354 | local_fd = CMD_GET(option_mask32) ? STDOUT_FILENO : STDIN_FILENO; |
| 355 | if (NOT_LONE_DASH(local_file)) |
| 356 | local_fd = xopen(local_file, open_mode); |
| 357 | /* Removing #if, or using if() statement instead of #if may lead to |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 358 | * "warning: null argument where non-null required": */ |
| 359 | #if ENABLE_TFTP |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 360 | /* tftp */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 361 | |
| 362 | /* We can't (and don't really need to) bind the socket: |
| 363 | * we don't know from which local IP datagrams will be sent, |
| 364 | * but kernel will pick the same IP every time (unless routing |
| 365 | * table is changed), thus peer will see dgrams consistently |
| 366 | * coming from the same IP. |
| 367 | * We would like to connect the socket, but since peer's |
| 368 | * UDP code can be less perfect than ours, _peer's_ IP:port |
| 369 | * in replies may differ from IP:port we used to send |
| 370 | * our first packet. We can connect() only when we get |
| 371 | * first reply. */ |
| 372 | |
| 373 | /* build opcode */ |
| 374 | opcode = TFTP_WRQ; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 375 | if (CMD_GET(option_mask32)) { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 376 | opcode = TFTP_RRQ; |
| 377 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 378 | /* add filename and mode */ |
| 379 | /* fill in packet if the filename fits into xbuf */ |
| 380 | len = strlen(remote_file) + 1; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 381 | if (2 + len + sizeof("octet") >= io_bufsize) { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 382 | bb_error_msg("remote filename is too long"); |
| 383 | goto ret; |
| 384 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 385 | strcpy(cp, remote_file); |
| 386 | cp += len; |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 387 | /* add "mode" part of the packet */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 388 | strcpy(cp, "octet"); |
| 389 | cp += sizeof("octet"); |
| 390 | |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 391 | # if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 392 | if (blksize == TFTP_BLKSIZE_DEFAULT && !want_transfer_size) |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 393 | goto send_pkt; |
| 394 | |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 395 | /* Need to add option to pkt */ |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 396 | if ((&xbuf[io_bufsize - 1] - cp) < sizeof("blksize NNNNN tsize ") + sizeof(off_t)*3) { |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 397 | bb_error_msg("remote filename is too long"); |
| 398 | goto ret; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 399 | } |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 400 | expect_OACK = 1; |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 401 | # endif |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 402 | #endif /* ENABLE_TFTP */ |
| 403 | |
Denis Vlasenko | 31e1286 | 2008-06-16 07:32:40 +0000 | [diff] [blame] | 404 | #if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 405 | add_blksize_opt: |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 406 | if (blksize != TFTP_BLKSIZE_DEFAULT) { |
| 407 | /* add "blksize", <nul>, blksize, <nul> */ |
| 408 | strcpy(cp, "blksize"); |
| 409 | cp += sizeof("blksize"); |
| 410 | cp += snprintf(cp, 6, "%d", blksize) + 1; |
| 411 | } |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 412 | if (want_transfer_size) { |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 413 | /* add "tsize", <nul>, size, <nul> (see RFC2349) */ |
| 414 | /* if tftp and downloading, we send "0" (since we opened local_fd with O_TRUNC) |
| 415 | * and this makes server to send "tsize" option with the size */ |
| 416 | /* if tftp and uploading, we send file size (maybe dont, to not confuse old servers???) */ |
| 417 | /* if tftpd and downloading, we are answering to client's request */ |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 418 | /* if tftpd and uploading: !want_transfer_size, this code is not executed */ |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 419 | struct stat st; |
| 420 | strcpy(cp, "tsize"); |
| 421 | cp += sizeof("tsize"); |
| 422 | st.st_size = 0; |
| 423 | fstat(local_fd, &st); |
| 424 | cp += sprintf(cp, "%"OFF_FMT"u", (off_t)st.st_size) + 1; |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 425 | # if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 426 | /* Save for progress bar. If 0 (tftp downloading), |
| 427 | * we look at server's reply later */ |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 428 | G.size = st.st_size; |
| 429 | if (remote_file && st.st_size) |
Denys Vlasenko | adc08ef | 2009-11-08 18:07:36 +0100 | [diff] [blame] | 430 | tftp_progress_init(); |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 431 | # endif |
| 432 | } |
Denis Vlasenko | 31e1286 | 2008-06-16 07:32:40 +0000 | [diff] [blame] | 433 | #endif |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 434 | /* First packet is built, so skip packet generation */ |
| 435 | goto send_pkt; |
| 436 | } |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 437 | |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 438 | /* Using mostly goto's - continue/break will be less clear |
| 439 | * in where we actually jump to */ |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 440 | while (1) { |
| 441 | /* Build ACK or DATA */ |
| 442 | cp = xbuf + 2; |
| 443 | *((uint16_t*)cp) = htons(block_nr); |
| 444 | cp += 2; |
| 445 | block_nr++; |
| 446 | opcode = TFTP_ACK; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 447 | if (CMD_PUT(option_mask32)) { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 448 | opcode = TFTP_DATA; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 449 | len = full_read(local_fd, cp, blksize); |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 450 | if (len < 0) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 451 | goto send_read_err_pkt; |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 452 | } |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 453 | if (len != blksize) { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 454 | finished = 1; |
| 455 | } |
| 456 | cp += len; |
Denys Vlasenko | 24ec952 | 2011-04-11 04:29:39 +0200 | [diff] [blame] | 457 | IF_FEATURE_TFTP_PROGRESS_BAR(G.pos += len;) |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 458 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 459 | send_pkt: |
| 460 | /* Send packet */ |
| 461 | *((uint16_t*)xbuf) = htons(opcode); /* fill in opcode part */ |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 462 | send_len = cp - xbuf; |
| 463 | /* NB: send_len value is preserved in code below |
| 464 | * for potential resend */ |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 465 | |
Denys Vlasenko | e4dcba1 | 2010-10-28 18:57:19 +0200 | [diff] [blame] | 466 | retries = TFTP_NUM_RETRIES; /* re-initialize */ |
Denis Vlasenko | 87f3b26 | 2007-09-07 13:43:28 +0000 | [diff] [blame] | 467 | waittime_ms = TFTP_TIMEOUT_MS; |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 468 | |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 469 | send_again: |
Denis Vlasenko | 35a064b | 2008-11-06 00:49:59 +0000 | [diff] [blame] | 470 | #if ENABLE_TFTP_DEBUG |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 471 | fprintf(stderr, "sending %u bytes\n", send_len); |
| 472 | for (cp = xbuf; cp < &xbuf[send_len]; cp++) |
| 473 | fprintf(stderr, "%02x ", (unsigned char) *cp); |
| 474 | fprintf(stderr, "\n"); |
Eric Andersen | 76fa8ea | 2001-08-20 17:47:49 +0000 | [diff] [blame] | 475 | #endif |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 476 | xsendto(socket_fd, xbuf, send_len, &peer_lsa->u.sa, peer_lsa->len); |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 477 | |
| 478 | #if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
Denys Vlasenko | d55e139 | 2011-02-11 18:56:13 +0100 | [diff] [blame] | 479 | if (is_bb_progress_inited(&G.pmt)) |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 480 | tftp_progress_update(); |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 481 | #endif |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 482 | /* Was it final ACK? then exit */ |
| 483 | if (finished && (opcode == TFTP_ACK)) |
| 484 | goto ret; |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 485 | |
Denis Vlasenko | 2c91652 | 2007-01-12 14:57:37 +0000 | [diff] [blame] | 486 | recv_again: |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 487 | /* Receive packet */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 488 | /*pfd[0].fd = socket_fd;*/ |
Denis Vlasenko | 87f3b26 | 2007-09-07 13:43:28 +0000 | [diff] [blame] | 489 | pfd[0].events = POLLIN; |
Denis Vlasenko | 5d61e71 | 2007-09-27 10:09:59 +0000 | [diff] [blame] | 490 | switch (safe_poll(pfd, 1, waittime_ms)) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 491 | default: |
| 492 | /*bb_perror_msg("poll"); - done in safe_poll */ |
| 493 | goto ret; |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 494 | case 0: |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 495 | retries--; |
| 496 | if (retries == 0) { |
Denys Vlasenko | 84dba9c | 2011-01-10 12:51:44 +0100 | [diff] [blame] | 497 | tftp_progress_done(); |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 498 | bb_error_msg("timeout"); |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 499 | goto ret; /* no err packet sent */ |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 500 | } |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 501 | |
| 502 | /* exponential backoff with limit */ |
Denis Vlasenko | 87f3b26 | 2007-09-07 13:43:28 +0000 | [diff] [blame] | 503 | waittime_ms += waittime_ms/2; |
| 504 | if (waittime_ms > TFTP_MAXTIMEOUT_MS) { |
| 505 | waittime_ms = TFTP_MAXTIMEOUT_MS; |
Paul Fox | 40f0bcf | 2007-09-06 17:52:22 +0000 | [diff] [blame] | 506 | } |
| 507 | |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 508 | goto send_again; /* resend last sent pkt */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 509 | case 1: |
| 510 | if (!our_lsa) { |
| 511 | /* tftp (not tftpd!) receiving 1st packet */ |
| 512 | our_lsa = ((void*)(ptrdiff_t)-1); /* not NULL */ |
| 513 | len = recvfrom(socket_fd, rbuf, io_bufsize, 0, |
| 514 | &peer_lsa->u.sa, &peer_lsa->len); |
| 515 | /* Our first dgram went to port 69 |
| 516 | * but reply may come from different one. |
| 517 | * Remember and use this new port (and IP) */ |
| 518 | if (len >= 0) |
| 519 | xconnect(socket_fd, &peer_lsa->u.sa, peer_lsa->len); |
| 520 | } else { |
| 521 | /* tftpd, or not the very first packet: |
| 522 | * socket is connect()ed, can just read from it. */ |
| 523 | /* Don't full_read()! |
| 524 | * This is not TCP, one read == one pkt! */ |
| 525 | len = safe_read(socket_fd, rbuf, io_bufsize); |
| 526 | } |
| 527 | if (len < 0) { |
| 528 | goto send_read_err_pkt; |
| 529 | } |
| 530 | if (len < 4) { /* too small? */ |
| 531 | goto recv_again; |
| 532 | } |
Denis Vlasenko | bf678d5 | 2007-05-09 12:50:08 +0000 | [diff] [blame] | 533 | } |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 534 | |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 535 | /* Process recv'ed packet */ |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 536 | opcode = ntohs( ((uint16_t*)rbuf)[0] ); |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 537 | recv_blk = ntohs( ((uint16_t*)rbuf)[1] ); |
Denis Vlasenko | 35a064b | 2008-11-06 00:49:59 +0000 | [diff] [blame] | 538 | #if ENABLE_TFTP_DEBUG |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 539 | fprintf(stderr, "received %d bytes: %04x %04x\n", len, opcode, recv_blk); |
Eric Andersen | 76fa8ea | 2001-08-20 17:47:49 +0000 | [diff] [blame] | 540 | #endif |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 541 | if (opcode == TFTP_ERROR) { |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 542 | static const char errcode_str[] ALIGN1 = |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 543 | "\0" |
| 544 | "file not found\0" |
| 545 | "access violation\0" |
| 546 | "disk full\0" |
| 547 | "bad operation\0" |
| 548 | "unknown transfer id\0" |
| 549 | "file already exists\0" |
| 550 | "no such user\0" |
| 551 | "bad option"; |
Denis Vlasenko | 80b8b39 | 2007-06-25 10:55:35 +0000 | [diff] [blame] | 552 | |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 553 | const char *msg = ""; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 554 | |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 555 | if (len > 4 && rbuf[4] != '\0') { |
Denis Vlasenko | 10f7dd1 | 2006-12-17 01:14:08 +0000 | [diff] [blame] | 556 | msg = &rbuf[4]; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 557 | rbuf[io_bufsize - 1] = '\0'; /* paranoia */ |
| 558 | } else if (recv_blk <= 8) { |
| 559 | msg = nth_string(errcode_str, recv_blk); |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 560 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 561 | bb_error_msg("server error: (%u) %s", recv_blk, msg); |
| 562 | goto ret; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 563 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 564 | |
Denis Vlasenko | 04291bc | 2006-11-21 10:15:25 +0000 | [diff] [blame] | 565 | #if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 566 | if (expect_OACK) { |
| 567 | expect_OACK = 0; |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 568 | if (opcode == TFTP_OACK) { |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 569 | /* server seems to support options */ |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 570 | char *res; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 571 | |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 572 | res = tftp_get_option("blksize", &rbuf[2], len - 2); |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 573 | if (res) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 574 | blksize = tftp_blksize_check(res, blksize); |
| 575 | if (blksize < 0) { |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 576 | G_error_pkt_reason = ERR_BAD_OPT; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 577 | goto send_err_pkt; |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 578 | } |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 579 | io_bufsize = blksize + 4; |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 580 | } |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 581 | # if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
Denys Vlasenko | 1e9ac9f | 2009-11-08 18:15:10 +0100 | [diff] [blame] | 582 | if (remote_file && G.size == 0) { /* if we don't know it yet */ |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 583 | res = tftp_get_option("tsize", &rbuf[2], len - 2); |
| 584 | if (res) { |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 585 | G.size = bb_strtoull(res, NULL, 10); |
Denys Vlasenko | 1e9ac9f | 2009-11-08 18:15:10 +0100 | [diff] [blame] | 586 | if (G.size) |
Denys Vlasenko | adc08ef | 2009-11-08 18:07:36 +0100 | [diff] [blame] | 587 | tftp_progress_init(); |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 588 | } |
| 589 | } |
| 590 | # endif |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 591 | if (CMD_GET(option_mask32)) { |
| 592 | /* We'll send ACK for OACK, |
| 593 | * such ACK has "block no" of 0 */ |
| 594 | block_nr = 0; |
| 595 | } |
| 596 | continue; |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 597 | } |
Atsushi Nemoto | 330d898 | 2009-07-24 22:34:47 +0200 | [diff] [blame] | 598 | /* rfc2347: |
| 599 | * "An option not acknowledged by the server |
Denys Vlasenko | 1e9ac9f | 2009-11-08 18:15:10 +0100 | [diff] [blame] | 600 | * must be ignored by the client and server |
| 601 | * as if it were never requested." */ |
Denys Vlasenko | 53e2f38 | 2010-06-12 03:29:58 +0200 | [diff] [blame] | 602 | if (blksize != TFTP_BLKSIZE_DEFAULT) |
| 603 | bb_error_msg("falling back to blocksize "TFTP_BLKSIZE_DEFAULT_STR); |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 604 | blksize = TFTP_BLKSIZE_DEFAULT; |
| 605 | io_bufsize = TFTP_BLKSIZE_DEFAULT + 4; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 606 | } |
| 607 | #endif |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 608 | /* block_nr is already advanced to next block# we expect |
| 609 | * to get / block# we are about to send next time */ |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 610 | |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 611 | if (CMD_GET(option_mask32) && (opcode == TFTP_DATA)) { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 612 | if (recv_blk == block_nr) { |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 613 | int sz = full_write(local_fd, &rbuf[4], len - 4); |
| 614 | if (sz != len - 4) { |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 615 | strcpy(G_error_pkt_str, bb_msg_write_error); |
| 616 | G_error_pkt_reason = ERR_WRITE; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 617 | goto send_err_pkt; |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 618 | } |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 619 | if (sz != blksize) { |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 620 | finished = 1; |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 621 | } |
Denys Vlasenko | 24ec952 | 2011-04-11 04:29:39 +0200 | [diff] [blame] | 622 | IF_FEATURE_TFTP_PROGRESS_BAR(G.pos += sz;) |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 623 | continue; /* send ACK */ |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 624 | } |
Denys Vlasenko | c8ab67c | 2009-05-10 23:27:43 +0200 | [diff] [blame] | 625 | /* Disabled to cope with servers with Sorcerer's Apprentice Syndrome */ |
| 626 | #if 0 |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 627 | if (recv_blk == (block_nr - 1)) { |
Paul Fox | 1d4c88c | 2005-07-20 19:49:15 +0000 | [diff] [blame] | 628 | /* Server lost our TFTP_ACK. Resend it */ |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 629 | block_nr = recv_blk; |
Paul Fox | 1d4c88c | 2005-07-20 19:49:15 +0000 | [diff] [blame] | 630 | continue; |
Denis Vlasenko | 4b924f3 | 2007-05-30 00:29:55 +0000 | [diff] [blame] | 631 | } |
Denys Vlasenko | c8ab67c | 2009-05-10 23:27:43 +0200 | [diff] [blame] | 632 | #endif |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 635 | if (CMD_PUT(option_mask32) && (opcode == TFTP_ACK)) { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 636 | /* did peer ACK our last DATA pkt? */ |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 637 | if (recv_blk == (uint16_t) (block_nr - 1)) { |
| 638 | if (finished) |
| 639 | goto ret; |
| 640 | continue; /* send next block */ |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 641 | } |
| 642 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 643 | /* Awww... recv'd packet is not recognized! */ |
| 644 | goto recv_again; |
| 645 | /* why recv_again? - rfc1123 says: |
| 646 | * "The sender (i.e., the side originating the DATA packets) |
| 647 | * must never resend the current DATA packet on receipt |
| 648 | * of a duplicate ACK". |
| 649 | * DATA pkts are resent ONLY on timeout. |
| 650 | * Thus "goto send_again" will ba a bad mistake above. |
| 651 | * See: |
| 652 | * http://en.wikipedia.org/wiki/Sorcerer's_Apprentice_Syndrome |
| 653 | */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 654 | } /* end of "while (1)" */ |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 655 | ret: |
Denis Vlasenko | 2c91652 | 2007-01-12 14:57:37 +0000 | [diff] [blame] | 656 | if (ENABLE_FEATURE_CLEAN_UP) { |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 657 | close(local_fd); |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 658 | close(socket_fd); |
Denis Vlasenko | 2c91652 | 2007-01-12 14:57:37 +0000 | [diff] [blame] | 659 | free(xbuf); |
| 660 | free(rbuf); |
| 661 | } |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 662 | return finished == 0; /* returns 1 on failure */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 663 | |
| 664 | send_read_err_pkt: |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 665 | strcpy(G_error_pkt_str, bb_msg_read_error); |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 666 | send_err_pkt: |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 667 | if (G_error_pkt_str[0]) |
| 668 | bb_error_msg("%s", G_error_pkt_str); |
| 669 | G.error_pkt[1] = TFTP_ERROR; |
| 670 | xsendto(socket_fd, G.error_pkt, 4 + 1 + strlen(G_error_pkt_str), |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 671 | &peer_lsa->u.sa, peer_lsa->len); |
| 672 | return EXIT_FAILURE; |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 673 | #undef remote_file |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 674 | } |
| 675 | |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 676 | #if ENABLE_TFTP |
| 677 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 678 | int tftp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 679 | int tftp_main(int argc UNUSED_PARAM, char **argv) |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 680 | { |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 681 | len_and_sockaddr *peer_lsa; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 682 | const char *local_file = NULL; |
| 683 | const char *remote_file = NULL; |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 684 | # if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Denis Vlasenko | 4824cca | 2008-03-21 18:29:01 +0000 | [diff] [blame] | 685 | const char *blksize_str = TFTP_BLKSIZE_DEFAULT_STR; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 686 | int blksize; |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 687 | # endif |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 688 | int result; |
| 689 | int port; |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 690 | IF_GETPUT(int opt;) |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 691 | |
| 692 | INIT_G(); |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 693 | |
Denis Vlasenko | 8e9ccba | 2007-01-11 16:50:23 +0000 | [diff] [blame] | 694 | /* -p or -g is mandatory, and they are mutually exclusive */ |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 695 | opt_complementary = "" IF_FEATURE_TFTP_GET("g:") IF_FEATURE_TFTP_PUT("p:") |
| 696 | IF_GETPUT("g--p:p--g:"); |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 697 | |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 698 | IF_GETPUT(opt =) getopt32(argv, |
| 699 | IF_FEATURE_TFTP_GET("g") IF_FEATURE_TFTP_PUT("p") |
| 700 | "l:r:" IF_FEATURE_TFTP_BLOCKSIZE("b:"), |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 701 | &local_file, &remote_file |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 702 | IF_FEATURE_TFTP_BLOCKSIZE(, &blksize_str)); |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 703 | argv += optind; |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 704 | |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 705 | # if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 706 | /* Check if the blksize is valid: |
| 707 | * RFC2348 says between 8 and 65464 */ |
| 708 | blksize = tftp_blksize_check(blksize_str, 65564); |
| 709 | if (blksize < 0) { |
| 710 | //bb_error_msg("bad block size"); |
Denis Vlasenko | 1d42665 | 2008-03-17 09:09:09 +0000 | [diff] [blame] | 711 | return EXIT_FAILURE; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 712 | } |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 713 | # endif |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 714 | |
Denis Vlasenko | f9beb61 | 2009-03-25 03:55:53 +0000 | [diff] [blame] | 715 | if (remote_file) { |
| 716 | if (!local_file) { |
| 717 | const char *slash = strrchr(remote_file, '/'); |
| 718 | local_file = slash ? slash + 1 : remote_file; |
| 719 | } |
| 720 | } else { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 721 | remote_file = local_file; |
Denis Vlasenko | f9beb61 | 2009-03-25 03:55:53 +0000 | [diff] [blame] | 722 | } |
| 723 | |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 724 | /* Error if filename or host is not known */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 725 | if (!remote_file || !argv[0]) |
Bernhard Reutner-Fischer | b25f98a | 2006-06-10 14:15:03 +0000 | [diff] [blame] | 726 | bb_show_usage(); |
"Vladimir N. Oleynik" | 86ac072 | 2005-10-17 10:47:19 +0000 | [diff] [blame] | 727 | |
Denis Vlasenko | a04561f | 2007-05-08 23:12:21 +0000 | [diff] [blame] | 728 | port = bb_lookup_port(argv[1], "udp", 69); |
| 729 | peer_lsa = xhost2sockaddr(argv[0], port); |
Eric Andersen | 76fa8ea | 2001-08-20 17:47:49 +0000 | [diff] [blame] | 730 | |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 731 | # if ENABLE_TFTP_DEBUG |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 732 | fprintf(stderr, "using server '%s', remote_file '%s', local_file '%s'\n", |
Bernhard Reutner-Fischer | 8c69afd | 2008-01-29 10:33:34 +0000 | [diff] [blame] | 733 | xmalloc_sockaddr2dotted(&peer_lsa->u.sa), |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 734 | remote_file, local_file); |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 735 | # endif |
Eric Andersen | 76fa8ea | 2001-08-20 17:47:49 +0000 | [diff] [blame] | 736 | |
Denys Vlasenko | adc08ef | 2009-11-08 18:07:36 +0100 | [diff] [blame] | 737 | # if ENABLE_FEATURE_TFTP_PROGRESS_BAR |
| 738 | G.file = remote_file; |
| 739 | # endif |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 740 | result = tftp_protocol( |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 741 | NULL /*our_lsa*/, peer_lsa, |
| 742 | local_file, remote_file |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 743 | IF_FEATURE_TFTP_BLOCKSIZE(, 1 /* want_transfer_size */) |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 744 | IF_FEATURE_TFTP_BLOCKSIZE(, blksize) |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 745 | ); |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 746 | tftp_progress_done(); |
Mark Whitley | 450736c | 2001-03-02 19:08:50 +0000 | [diff] [blame] | 747 | |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 748 | if (result != EXIT_SUCCESS && NOT_LONE_DASH(local_file) && CMD_GET(opt)) { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 749 | unlink(local_file); |
Eric Andersen | a66a43e | 2002-04-13 09:30:25 +0000 | [diff] [blame] | 750 | } |
Denis Vlasenko | 000b9ba | 2006-10-05 23:12:49 +0000 | [diff] [blame] | 751 | return result; |
Glenn L McGrath | ad117d8 | 2001-10-05 04:40:37 +0000 | [diff] [blame] | 752 | } |
Denis Vlasenko | 3163555 | 2007-01-20 16:54:19 +0000 | [diff] [blame] | 753 | |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 754 | #endif /* ENABLE_TFTP */ |
| 755 | |
| 756 | #if ENABLE_TFTPD |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 757 | int tftpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 758 | int tftpd_main(int argc UNUSED_PARAM, char **argv) |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 759 | { |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 760 | len_and_sockaddr *our_lsa; |
| 761 | len_and_sockaddr *peer_lsa; |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 762 | char *local_file, *mode, *user_opt; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 763 | const char *error_msg; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 764 | int opt, result, opcode; |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 765 | IF_FEATURE_TFTP_BLOCKSIZE(int blksize = TFTP_BLKSIZE_DEFAULT;) |
Denys Vlasenko | 31e2e7b | 2009-12-12 02:42:35 +0100 | [diff] [blame] | 766 | IF_FEATURE_TFTP_BLOCKSIZE(int want_transfer_size = 0;) |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 767 | |
| 768 | INIT_G(); |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 769 | |
| 770 | our_lsa = get_sock_lsa(STDIN_FILENO); |
Denis Vlasenko | 5a89763 | 2008-11-01 00:22:24 +0000 | [diff] [blame] | 771 | if (!our_lsa) { |
| 772 | /* This is confusing: |
| 773 | *bb_error_msg_and_die("stdin is not a socket"); |
| 774 | * Better: */ |
| 775 | bb_show_usage(); |
| 776 | /* Help text says that tftpd must be used as inetd service, |
| 777 | * which is by far the most usual cause of get_sock_lsa |
| 778 | * failure */ |
| 779 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 780 | peer_lsa = xzalloc(LSA_LEN_SIZE + our_lsa->len); |
| 781 | peer_lsa->len = our_lsa->len; |
| 782 | |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 783 | /* Shifting to not collide with TFTP_OPTs */ |
Denys Vlasenko | 532e961 | 2011-04-11 05:12:53 +0200 | [diff] [blame] | 784 | opt = option_mask32 = TFTPD_OPT | (getopt32(argv, "rcu:l", &user_opt) << 8); |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 785 | argv += optind; |
Denys Vlasenko | 532e961 | 2011-04-11 05:12:53 +0200 | [diff] [blame] | 786 | if (opt & TFTPD_OPT_l) { |
| 787 | openlog(applet_name, LOG_PID, LOG_DAEMON); |
| 788 | logmode = LOGMODE_SYSLOG; |
| 789 | } |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 790 | if (opt & TFTPD_OPT_u) { |
| 791 | /* Must be before xchroot */ |
| 792 | G.pw = xgetpwnam(user_opt); |
| 793 | } |
Denys Vlasenko | 4e3beb2 | 2012-03-08 00:28:52 +0100 | [diff] [blame] | 794 | if (argv[0]) { |
| 795 | xchroot(argv[0]); |
| 796 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 797 | |
Denys Vlasenko | 67e01fe | 2014-09-03 18:35:38 +0200 | [diff] [blame] | 798 | result = recv_from_to(STDIN_FILENO, |
| 799 | G.block_buf, sizeof(G.block_buf) + 1, |
| 800 | /* ^^^ sizeof+1 to reliably detect oversized input */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 801 | 0 /* flags */, |
| 802 | &peer_lsa->u.sa, &our_lsa->u.sa, our_lsa->len); |
| 803 | |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 804 | error_msg = "malformed packet"; |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 805 | opcode = ntohs(*(uint16_t*)G.block_buf); |
Denys Vlasenko | 67e01fe | 2014-09-03 18:35:38 +0200 | [diff] [blame] | 806 | if (result < 4 || result > sizeof(G.block_buf) |
| 807 | /*|| G.block_buf[result-1] != '\0' - bug compatibility, see below */ |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 808 | || (IF_FEATURE_TFTP_PUT(opcode != TFTP_RRQ) /* not download */ |
| 809 | IF_GETPUT(&&) |
| 810 | IF_FEATURE_TFTP_GET(opcode != TFTP_WRQ) /* not upload */ |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 811 | ) |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 812 | ) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 813 | goto err; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 814 | } |
Denys Vlasenko | 4eb1e42 | 2014-09-04 12:24:03 +0200 | [diff] [blame] | 815 | /* Some HP PA-RISC firmware always sends fixed 516-byte requests, |
Denys Vlasenko | 67e01fe | 2014-09-03 18:35:38 +0200 | [diff] [blame] | 816 | * with trailing garbage. |
| 817 | * Support that by not requiring NUL to be the last byte (see above). |
| 818 | * To make strXYZ() ops safe, force NUL termination: |
| 819 | */ |
| 820 | G.block_buf_tail[0] = '\0'; |
| 821 | |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 822 | local_file = G.block_buf + 2; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 823 | if (local_file[0] == '.' || strstr(local_file, "/.")) { |
Denis Vlasenko | 0a0180c | 2008-03-19 23:37:32 +0000 | [diff] [blame] | 824 | error_msg = "dot in file name"; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 825 | goto err; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 826 | } |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 827 | mode = local_file + strlen(local_file) + 1; |
Denys Vlasenko | faf7c62 | 2011-10-06 17:19:09 +0200 | [diff] [blame] | 828 | /* RFC 1350 says mode string is case independent */ |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 829 | if (mode >= G.block_buf + result || strcasecmp(mode, "octet") != 0) { |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 830 | goto err; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 831 | } |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 832 | # if ENABLE_FEATURE_TFTP_BLOCKSIZE |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 833 | { |
| 834 | char *res; |
| 835 | char *opt_str = mode + sizeof("octet"); |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 836 | int opt_len = G.block_buf + result - opt_str; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 837 | if (opt_len > 0) { |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 838 | res = tftp_get_option("blksize", opt_str, opt_len); |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 839 | if (res) { |
| 840 | blksize = tftp_blksize_check(res, 65564); |
| 841 | if (blksize < 0) { |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 842 | G_error_pkt_reason = ERR_BAD_OPT; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 843 | /* will just send error pkt */ |
| 844 | goto do_proto; |
| 845 | } |
| 846 | } |
Denys Vlasenko | 6528abe | 2009-11-08 18:27:18 +0100 | [diff] [blame] | 847 | if (opcode != TFTP_WRQ /* download? */ |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 848 | /* did client ask us about file size? */ |
Denys Vlasenko | 6528abe | 2009-11-08 18:27:18 +0100 | [diff] [blame] | 849 | && tftp_get_option("tsize", opt_str, opt_len) |
| 850 | ) { |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 851 | want_transfer_size = 1; |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 852 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 853 | } |
| 854 | } |
Magnus Damm | bbd4235 | 2009-11-08 18:00:59 +0100 | [diff] [blame] | 855 | # endif |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 856 | |
Denis Vlasenko | d7e6af2 | 2008-03-18 01:13:11 +0000 | [diff] [blame] | 857 | if (!ENABLE_FEATURE_TFTP_PUT || opcode == TFTP_WRQ) { |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 858 | if (opt & TFTPD_OPT_r) { |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 859 | /* This would mean "disk full" - not true */ |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 860 | /*G_error_pkt_reason = ERR_WRITE;*/ |
Denis Vlasenko | 71c9f01 | 2008-03-19 09:43:50 +0000 | [diff] [blame] | 861 | error_msg = bb_msg_write_error; |
| 862 | goto err; |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 863 | } |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 864 | IF_GETPUT(option_mask32 |= TFTP_OPT_GET;) /* will receive file's data */ |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 865 | } else { |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 866 | IF_GETPUT(option_mask32 |= TFTP_OPT_PUT;) /* will send file's data */ |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 867 | } |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 868 | |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 869 | /* NB: if G_error_pkt_str or G_error_pkt_reason is set up, |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 870 | * tftp_protocol() just sends one error pkt and returns */ |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 871 | |
Denis Vlasenko | dd9228b | 2008-03-19 05:00:05 +0000 | [diff] [blame] | 872 | do_proto: |
Denis Vlasenko | 8474cd3 | 2008-06-16 07:12:19 +0000 | [diff] [blame] | 873 | close(STDIN_FILENO); /* close old, possibly wildcard socket */ |
| 874 | /* tftp_protocol() will create new one, bound to particular local IP */ |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 875 | result = tftp_protocol( |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 876 | our_lsa, peer_lsa, |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 877 | local_file IF_TFTP(, NULL /*remote_file*/) |
Magnus Damm | 8bd0af9 | 2009-11-08 18:03:09 +0100 | [diff] [blame] | 878 | IF_FEATURE_TFTP_BLOCKSIZE(, want_transfer_size) |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 879 | IF_FEATURE_TFTP_BLOCKSIZE(, blksize) |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 880 | ); |
| 881 | |
| 882 | return result; |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 883 | err: |
Denys Vlasenko | dbed6c4 | 2012-07-18 17:32:32 +0200 | [diff] [blame] | 884 | strcpy(G_error_pkt_str, error_msg); |
Denis Vlasenko | 403a5a2 | 2008-03-19 13:07:00 +0000 | [diff] [blame] | 885 | goto do_proto; |
Denis Vlasenko | aa9b182 | 2008-03-17 09:10:39 +0000 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | #endif /* ENABLE_TFTPD */ |
| 889 | |
Denis Vlasenko | 3163555 | 2007-01-20 16:54:19 +0000 | [diff] [blame] | 890 | #endif /* ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT */ |