1 /* $NetBSD: ftpcmd.y,v 1.94 2015/08/10 07:45:50 shm Exp $ */
4 * Copyright (c) 1997-2009 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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33 * Copyright (c) 1985, 1988, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
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37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
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50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * @(#)ftpcmd.y 8.3 (Berkeley) 4/6/94
64 * Grammar for FTP commands.
69 #include <sys/cdefs.h>
73 static char sccsid
[] = "@(#)ftpcmd.y 8.3 (Berkeley) 4/6/94";
75 __RCSID
("$NetBSD: ftpcmd.y,v 1.94 2015/08/10 07:45:50 shm Exp $");
79 #include <sys/param.h>
80 #include <sys/socket.h>
83 #include <netinet/in.h>
85 #include <arpa/inet.h>
100 #include <krb5/krb5.h>
108 static int cmd_bytesz
;
110 char cbuf
[FTP_BUFLEN
];
115 struct tab sitetab
[];
117 static int check_write
(const char *, int);
118 static void help
(struct tab
*, const char *);
119 static void port_check
(const char *, int);
139 USER PASS ACCT CWD CDUP SMNT
140 QUIT REIN PORT PASV TYPE STRU
141 MODE RETR STOR STOU APPE ALLO
142 REST RNFR RNTO ABOR DELE RMD
143 MKD PWD LIST NLST SITE SYST
146 AUTH ADAT PROT PBSZ CCC MIC
155 MAIL MLFL MRCP MRSQ MSAM MSND
158 CHMOD IDLE RATEGET RATEPUT UMASK
165 %type
<u.i
> check_login octal_number byte_size
166 %type
<u.i
> struct_code mode_code type_code form_code decimal_integer
167 %type
<s
> pathstring pathname password username
168 %type
<s
> mechanism_name base64data prot_code
177 REASSIGN
(fromname
, NULL
);
178 restart_point
= (off_t
) 0;
187 : USER SP username CRLF
193 | PASS SP password CRLF
196 explicit_memset
($3, 0, strlen
($3));
200 | CWD check_login CRLF
206 | CWD check_login SP pathname CRLF
208 if
($2 && $4 != NULL
)
214 | CDUP check_login CRLF
223 reply
(-221, "%s", "");
225 "Data traffic for this session was " LLF
" byte%s in " LLF
" file%s.",
226 (LLT
)total_data
, PLURAL
(total_data
),
227 (LLT
)total_files
, PLURAL
(total_files
));
229 "Total traffic for this session was " LLF
" byte%s in " LLF
" transfer%s.",
230 (LLT
)total_bytes
, PLURAL
(total_bytes
),
231 (LLT
)total_xfers
, PLURAL
(total_xfers
));
234 "Thank you for using the FTP service on %s.",
236 if
(logged_in
&& logging
) {
238 "Data traffic: " LLF
" byte%s in " LLF
" file%s",
239 (LLT
)total_data
, PLURAL
(total_data
),
240 (LLT
)total_files
, PLURAL
(total_files
));
242 "Total traffic: " LLF
" byte%s in " LLF
" transfer%s",
243 (LLT
)total_bytes
, PLURAL
(total_bytes
),
244 (LLT
)total_xfers
, PLURAL
(total_xfers
));
250 | PORT check_login SP host_port CRLF
253 port_check
("PORT", AF_INET
);
256 | LPRT check_login SP host_long_port4 CRLF
259 port_check
("LPRT", AF_INET
);
262 | LPRT check_login SP host_long_port6 CRLF
266 port_check
("LPRT", AF_INET6
);
268 reply
(500, "IPv6 support not available.");
272 | EPRT check_login SP STRING CRLF
275 if
(extended_port
($4) == 0)
276 port_check
("EPRT", -1);
281 | PASV check_login CRLF
284 if
(CURCLASS_FLAGS_ISSET
(passive
))
287 reply
(500, "PASV mode not available.");
291 | LPSV check_login CRLF
294 if
(CURCLASS_FLAGS_ISSET
(passive
)) {
297 "LPSV disallowed after EPSV ALL");
299 long_passive
("LPSV", PF_UNSPEC
);
301 reply
(500, "LPSV mode not available.");
305 | EPSV check_login SP NUMBER CRLF
308 if
(CURCLASS_FLAGS_ISSET
(passive
))
312 reply
(500, "EPSV mode not available.");
316 | EPSV check_login SP ALL CRLF
319 if
(CURCLASS_FLAGS_ISSET
(passive
)) {
321 "EPSV ALL command successful.");
324 reply
(500, "EPSV mode not available.");
328 | EPSV check_login CRLF
331 if
(CURCLASS_FLAGS_ISSET
(passive
))
332 long_passive
("EPSV", PF_UNSPEC
);
334 reply
(500, "EPSV mode not available.");
338 | TYPE check_login SP type_code CRLF
345 if
(cmd_form
== FORM_N
) {
346 reply
(200, "Type set to A.");
350 reply
(504, "Form must be N.");
354 reply
(504, "Type E not implemented.");
358 reply
(200, "Type set to I.");
364 if
(cmd_bytesz
== 8) {
366 "Type set to L (byte size 8).");
369 reply
(504, "Byte size must be 8.");
370 #else /* NBBY == 8 */
371 UNIMPLEMENTED for NBBY
!= 8
372 #endif /* NBBY == 8 */
378 | STRU check_login SP struct_code CRLF
384 reply
(200, "STRU F ok.");
388 reply
(504, "Unimplemented STRU type.");
393 | MODE check_login SP mode_code CRLF
399 reply
(200, "MODE S ok.");
403 reply
(502, "Unimplemented MODE type.");
408 | RETR check_login SP pathname CRLF
410 if
($2 && $4 != NULL
)
416 | STOR SP pathname CRLF
418 if
(check_write
($3, 1))
424 | STOU SP pathname CRLF
426 if
(check_write
($3, 1))
432 | APPE SP pathname CRLF
434 if
(check_write
($3, 1))
440 | ALLO check_login SP NUMBER CRLF
443 reply
(202, "ALLO command ignored.");
446 | ALLO check_login SP NUMBER SP R SP NUMBER CRLF
449 reply
(202, "ALLO command ignored.");
452 | RNTO SP pathname CRLF
454 if
(check_write
($3, 0)) {
456 renamecmd
(fromname
, $3);
457 REASSIGN
(fromname
, NULL
);
459 reply
(503, "Bad sequence of commands.");
466 | ABOR check_login CRLF
471 reply
(225, "ABOR command successful.");
474 | DELE SP pathname CRLF
476 if
(check_write
($3, 0))
482 | RMD SP pathname CRLF
484 if
(check_write
($3, 0))
490 | MKD SP pathname CRLF
492 if
(check_write
($3, 0))
498 | PWD check_login CRLF
504 | LIST check_login CRLF
506 const char *argv
[] = { INTERNAL_LS
, "-lgA", NULL
};
508 if
(CURCLASS_FLAGS_ISSET
(hidesymlinks
))
514 | LIST check_login SP pathname CRLF
516 const char *argv
[] = { INTERNAL_LS
, "-lgA", NULL
, NULL
};
518 if
(CURCLASS_FLAGS_ISSET
(hidesymlinks
))
520 if
($2 && $4 != NULL
) {
528 | NLST check_login CRLF
534 | NLST check_login SP pathname CRLF
546 | SITE SP CHMOD SP octal_number SP pathname CRLF
548 if
(check_write
($7, 0)) {
549 if
(($5 == -1) ||
($5 > 0777))
551 "CHMOD: Mode value must be between 0 and 0777");
552 else if
(chmod
($7, $5) < 0)
553 perror_reply
(550, $7);
555 reply
(200, "CHMOD command successful.");
561 | SITE SP HELP SP STRING CRLF
567 | SITE SP IDLE check_login CRLF
571 "Current IDLE time limit is " LLF
572 " seconds; max " LLF
,
573 (LLT
)curclass.timeout
,
574 (LLT
)curclass.maxtimeout
);
578 | SITE SP IDLE check_login SP NUMBER CRLF
581 if
($6.i
< 30 ||
$6.i
> curclass.maxtimeout
) {
583 "IDLE time limit must be between 30 and "
585 (LLT
)curclass.maxtimeout
);
587 curclass.timeout
= $6.i
;
588 (void) alarm
(curclass.timeout
);
590 "IDLE time limit set to "
592 (LLT
)curclass.timeout
);
597 | SITE SP RATEGET check_login CRLF
601 "Current RATEGET is " LLF
" bytes/sec",
602 (LLT
)curclass.rateget
);
606 | SITE SP RATEGET check_login SP STRING CRLF
613 rate
= strsuftollx
("RATEGET", p
, 0,
615 ? curclass.maxrateget
616 : LLTMAX
, errbuf
, sizeof
(errbuf
));
618 reply
(501, "%s", errbuf
);
620 curclass.rateget
= rate
;
622 "RATEGET set to " LLF
" bytes/sec",
623 (LLT
)curclass.rateget
);
629 | SITE SP RATEPUT check_login CRLF
633 "Current RATEPUT is " LLF
" bytes/sec",
634 (LLT
)curclass.rateput
);
638 | SITE SP RATEPUT check_login SP STRING CRLF
645 rate
= strsuftollx
("RATEPUT", p
, 0,
647 ? curclass.maxrateput
648 : LLTMAX
, errbuf
, sizeof
(errbuf
));
650 reply
(501, "%s", errbuf
);
652 curclass.rateput
= rate
;
654 "RATEPUT set to " LLF
" bytes/sec",
655 (LLT
)curclass.rateput
);
661 | SITE SP UMASK check_login CRLF
667 (void) umask
(oldmask
);
668 reply
(200, "Current UMASK is %03o", oldmask
);
672 | SITE SP UMASK check_login SP octal_number CRLF
676 if
($4 && check_write
("", 0)) {
677 if
(($6 == -1) ||
($6 > 0777)) {
678 reply
(501, "Bad UMASK value");
682 "UMASK set to %03o (was %03o)",
690 if
(EMPTYSTR
(version
))
691 reply
(215, "UNIX Type: L%d", NBBY
);
693 reply
(215, "UNIX Type: L%d Version: %s", NBBY
,
697 | STAT check_login SP pathname CRLF
699 if
($2 && $4 != NULL
)
718 | HELP SP STRING CRLF
722 if
(strncasecmp
(cp
, "SITE", 4) == 0) {
737 reply
(200, "NOOP command successful.");
741 | AUTH SP mechanism_name CRLF
743 reply
(502, "RFC 2228 authentication not implemented.");
747 | ADAT SP base64data CRLF
750 "Please set authentication state with AUTH.");
754 | PROT SP prot_code CRLF
757 "Please set protection buffer size with PBSZ.");
761 | PBSZ SP decimal_integer CRLF
764 "Please set authentication state with AUTH.");
769 reply
(533, "No protection enabled.");
772 | MIC SP base64data CRLF
774 reply
(502, "RFC 2228 authentication not implemented.");
778 | CONF SP base64data CRLF
780 reply
(502, "RFC 2228 authentication not implemented.");
784 | ENC SP base64data CRLF
786 reply
(502, "RFC 2228 authentication not implemented.");
797 | OPTS SP STRING CRLF
808 * Return size of file in a format suitable for
809 * using with RESTART (we just count bytes).
811 | SIZE check_login SP pathname CRLF
813 if
($2 && $4 != NULL
)
820 * Return modification time of file as an ISO 3307
821 * style time. E.g. YYYYMMDDHHMMSS or YYYYMMDDHHMMSS.xxx
822 * where xxx is the fractional second (of any precision,
823 * not necessarily 3 digits)
825 | MDTM check_login SP pathname CRLF
827 if
($2 && $4 != NULL
) {
829 if
(stat
($4, &stbuf
) < 0)
830 perror_reply
(550, $4);
831 else if
(!S_ISREG
(stbuf.st_mode
)) {
832 reply
(550, "%s: not a plain file.", $4);
836 t
= gmtime
(&stbuf.st_mtime
);
838 "%04d%02d%02d%02d%02d%02d",
839 TM_YEAR_BASE
+ t
->tm_year
,
840 t
->tm_mon
+1, t
->tm_mday
,
841 t
->tm_hour
, t
->tm_min
, t
->tm_sec
);
848 | MLST check_login SP pathname CRLF
850 if
($2 && $4 != NULL
)
856 | MLST check_login CRLF
861 | MLSD check_login SP pathname CRLF
863 if
($2 && $4 != NULL
)
869 | MLSD check_login CRLF
881 : REST check_login SP NUMBER CRLF
884 REASSIGN
(fromname
, NULL
);
885 restart_point
= (off_t
)$4.ll
;
887 "Restarting at " LLF
". Send STORE or RETRIEVE to initiate transfer.",
892 | RNFR SP pathname CRLF
894 restart_point
= (off_t
) 0;
895 if
(check_write
($3, 0)) {
896 REASSIGN
(fromname
, NULL
);
897 fromname
= renamefrom
($3);
911 $$
= (char *)calloc
(1, sizeof
(char));
925 : NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
930 memset
(&data_dest
, 0, sizeof
(data_dest
));
931 data_dest.su_len
= sizeof
(struct sockaddr_in
);
932 data_dest.su_family
= AF_INET
;
933 p
= (char *)&data_dest.su_port
;
934 p
[0] = $9.i
; p
[1] = $11.i
;
935 a
= (char *)&data_dest.su_addr
;
936 a
[0] = $1.i
; a
[1] = $3.i
; a
[2] = $5.i
; a
[3] = $7.i
;
941 : NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
942 NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
947 memset
(&data_dest
, 0, sizeof
(data_dest
));
948 data_dest.su_len
= sizeof
(struct sockaddr_in
);
949 data_dest.su_family
= AF_INET
;
950 p
= (char *)&data_dest.su_port
;
951 p
[0] = $15.i
; p
[1] = $17.i
;
952 a
= (char *)&data_dest.su_addr
;
953 a
[0] = $5.i
; a
[1] = $7.i
; a
[2] = $9.i
; a
[3] = $11.i
;
955 /* reject invalid LPRT command */
956 if
($1.i
!= 4 ||
$3.i
!= 4 ||
$13.i
!= 2)
957 memset
(&data_dest
, 0, sizeof
(data_dest
));
962 : NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
963 NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
964 NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
965 NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
966 NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
970 unsigned char buf
[16];
972 (void)memset
(&data_dest
, 0, sizeof
(data_dest
));
973 data_dest.su_len
= sizeof
(struct sockaddr_in6
);
974 data_dest.su_family
= AF_INET6
;
975 buf
[0] = $39.i
; buf
[1] = $41.i
;
976 (void)memcpy
(&data_dest.su_port
, buf
,
977 sizeof
(data_dest.su_port
));
978 buf
[0] = $5.i
; buf
[1] = $7.i
;
979 buf
[2] = $9.i
; buf
[3] = $11.i
;
980 buf
[4] = $13.i
; buf
[5] = $15.i
;
981 buf
[6] = $17.i
; buf
[7] = $19.i
;
982 buf
[8] = $21.i
; buf
[9] = $23.i
;
983 buf
[10] = $25.i
; buf
[11] = $27.i
;
984 buf
[12] = $29.i
; buf
[13] = $31.i
;
985 buf
[14] = $33.i
; buf
[15] = $35.i
;
986 (void)memcpy
(&data_dest.si_su.su_sin6.sin6_addr
,
987 buf
, sizeof
(data_dest.si_su.su_sin6.sin6_addr
));
988 if
(his_addr.su_family
== AF_INET6
) {
989 /* XXX: more sanity checks! */
990 data_dest.su_scope_id
= his_addr.su_scope_id
;
993 memset
(&data_dest
, 0, sizeof
(data_dest
));
995 /* reject invalid LPRT command */
996 if
($1.i
!= 6 ||
$3.i
!= 16 ||
$37.i
!= 2)
997 memset
(&data_dest
, 0, sizeof
(data_dest
));
1060 /* this is for a bug in the BBN ftp */
1106 * Problem: this production is used for all pathname
1107 * processing, but only gives a 550 error reply.
1108 * This is a valid reply in some cases but not in
1111 if
(logged_in
&& $1 && *$1 == '~') {
1112 char *path
, *home
, *result
;
1115 path
= strchr
($1 + 1, '/');
1123 if
((hpw
= getpwnam
($1 + 1)) != NULL
)
1128 len
= strlen
(home
) + 1;
1130 len
+= strlen
(path
) + 1;
1131 if
((result
= malloc
(len
)) == NULL
)
1132 fatal
("Local resource failure: malloc");
1133 strlcpy
(result
, home
, len
);
1135 strlcat
(result
, "/", len
);
1136 strlcat
(result
, path
, len
);
1152 int ret
, dec
, multby
, digit
;
1155 * Convert a number that was read as decimal number
1156 * to what it would be if it had been read as octal.
1167 ret
+= digit
* multby
;
1200 reply
(530, "Please login with USER and PASS.");
1209 #define CMD 0 /* beginning of command */
1210 #define ARGS 1 /* expect miscellaneous arguments */
1211 #define STR1 2 /* expect SP followed by STRING */
1212 #define STR2 3 /* expect STRING */
1213 #define OSTR 4 /* optional SP then STRING */
1214 #define ZSTR1 5 /* SP then optional STRING */
1215 #define ZSTR2 6 /* optional STRING after SP */
1216 #define SITECMD 7 /* SITE command */
1217 #define NSTR 8 /* Number followed by a string */
1218 #define NOARGS 9 /* No arguments allowed */
1219 #define EOLN 10 /* End of line */
1221 struct tab cmdtab
[] = {
1222 /* From RFC 959, in order defined (5.3.1) */
1223 { "USER", USER
, STR1
, 1, "<sp> username", 0, },
1224 { "PASS", PASS
, ZSTR1
, 1, "<sp> password", 0, },
1225 { "ACCT", ACCT
, STR1
, 0, "(specify account)", 0, },
1226 { "CWD", CWD
, OSTR
, 1, "[ <sp> directory-name ]", 0, },
1227 { "CDUP", CDUP
, NOARGS
, 1, "(change to parent directory)", 0, },
1228 { "SMNT", SMNT
, ARGS
, 0, "(structure mount)", 0, },
1229 { "QUIT", QUIT
, NOARGS
, 1, "(terminate service)", 0, },
1230 { "REIN", REIN
, NOARGS
, 0, "(reinitialize server state)", 0, },
1231 { "PORT", PORT
, ARGS
, 1, "<sp> b0, b1, b2, b3, b4, b5", 0, },
1232 { "LPRT", LPRT
, ARGS
, 1, "<sp> af, hal, h1, h2, h3,..., pal, p1, p2...", 0, },
1233 { "EPRT", EPRT
, STR1
, 1, "<sp> |af|addr|port|", 0, },
1234 { "PASV", PASV
, NOARGS
, 1, "(set server in passive mode)", 0, },
1235 { "LPSV", LPSV
, ARGS
, 1, "(set server in passive mode)", 0, },
1236 { "EPSV", EPSV
, ARGS
, 1, "[<sp> af|ALL]", 0, },
1237 { "TYPE", TYPE
, ARGS
, 1, "<sp> [ A | E | I | L ]", 0, },
1238 { "STRU", STRU
, ARGS
, 1, "(specify file structure)", 0, },
1239 { "MODE", MODE
, ARGS
, 1, "(specify transfer mode)", 0, },
1240 { "RETR", RETR
, STR1
, 1, "<sp> file-name", 0, },
1241 { "STOR", STOR
, STR1
, 1, "<sp> file-name", 0, },
1242 { "STOU", STOU
, STR1
, 1, "<sp> file-name", 0, },
1243 { "APPE", APPE
, STR1
, 1, "<sp> file-name", 0, },
1244 { "ALLO", ALLO
, ARGS
, 1, "allocate storage (vacuously)", 0, },
1245 { "REST", REST
, ARGS
, 1, "<sp> offset (restart command)", 0, },
1246 { "RNFR", RNFR
, STR1
, 1, "<sp> file-name", 0, },
1247 { "RNTO", RNTO
, STR1
, 1, "<sp> file-name", 0, },
1248 { "ABOR", ABOR
, NOARGS
, 4, "(abort operation)", 0, },
1249 { "DELE", DELE
, STR1
, 1, "<sp> file-name", 0, },
1250 { "RMD", RMD
, STR1
, 1, "<sp> path-name", 0, },
1251 { "MKD", MKD
, STR1
, 1, "<sp> path-name", 0, },
1252 { "PWD", PWD
, NOARGS
, 1, "(return current directory)", 0, },
1253 { "LIST", LIST
, OSTR
, 1, "[ <sp> path-name ]", 0, },
1254 { "NLST", NLST
, OSTR
, 1, "[ <sp> path-name ]", 0, },
1255 { "SITE", SITE
, SITECMD
, 1, "site-cmd [ <sp> arguments ]", 0, },
1256 { "SYST", SYST
, NOARGS
, 1, "(get type of operating system)", 0, },
1257 { "STAT", STAT
, OSTR
, 4, "[ <sp> path-name ]", 0, },
1258 { "HELP", HELP
, OSTR
, 1, "[ <sp> <string> ]", 0, },
1259 { "NOOP", NOOP
, NOARGS
, 2, "", 0, },
1261 /* From RFC 2228, in order defined */
1262 { "AUTH", AUTH
, STR1
, 1, "<sp> mechanism-name", 0, },
1263 { "ADAT", ADAT
, STR1
, 1, "<sp> base-64-data", 0, },
1264 { "PROT", PROT
, STR1
, 1, "<sp> prot-code", 0, },
1265 { "PBSZ", PBSZ
, ARGS
, 1, "<sp> decimal-integer", 0, },
1266 { "CCC", CCC
, NOARGS
, 1, "(Disable data protection)", 0, },
1267 { "MIC", MIC
, STR1
, 4, "<sp> base64data", 0, },
1268 { "CONF", CONF
, STR1
, 4, "<sp> base64data", 0, },
1269 { "ENC", ENC
, STR1
, 4, "<sp> base64data", 0, },
1271 /* From RFC 2389, in order defined */
1272 { "FEAT", FEAT
, NOARGS
, 1, "(display extended features)", 0, },
1273 { "OPTS", OPTS
, STR1
, 1, "<sp> command [ <sp> options ]", 0, },
1275 /* From RFC 3659, in order defined */
1276 { "MDTM", MDTM
, OSTR
, 1, "<sp> path-name", 0, },
1277 { "SIZE", SIZE
, OSTR
, 1, "<sp> path-name", 0, },
1278 { "MLST", MLST
, OSTR
, 2, "[ <sp> path-name ]", 0, },
1279 { "MLSD", MLSD
, OSTR
, 1, "[ <sp> directory-name ]", 0, },
1281 /* obsolete commands */
1282 { "MAIL", MAIL
, OSTR
, 0, "(mail to user)", 0, },
1283 { "MLFL", MLFL
, OSTR
, 0, "(mail file)", 0, },
1284 { "MRCP", MRCP
, STR1
, 0, "(mail recipient)", 0, },
1285 { "MRSQ", MRSQ
, OSTR
, 0, "(mail recipient scheme question)", 0, },
1286 { "MSAM", MSAM
, OSTR
, 0, "(mail send to terminal and mailbox)", 0, },
1287 { "MSND", MSND
, OSTR
, 0, "(mail send to terminal)", 0, },
1288 { "MSOM", MSOM
, OSTR
, 0, "(mail send to terminal or mailbox)", 0, },
1289 { "XCUP", CDUP
, NOARGS
, 1, "(change to parent directory)", 0, },
1290 { "XCWD", CWD
, OSTR
, 1, "[ <sp> directory-name ]", 0, },
1291 { "XMKD", MKD
, STR1
, 1, "<sp> path-name", 0, },
1292 { "XPWD", PWD
, NOARGS
, 1, "(return current directory)", 0, },
1293 { "XRMD", RMD
, STR1
, 1, "<sp> path-name", 0, },
1295 { NULL
, 0, 0, 0, 0, 0, }
1298 struct tab sitetab
[] = {
1299 { "CHMOD", CHMOD
, NSTR
, 1, "<sp> mode <sp> file-name", 0, },
1300 { "HELP", HELP
, OSTR
, 1, "[ <sp> <string> ]", 0, },
1301 { "IDLE", IDLE
, ARGS
, 1, "[ <sp> maximum-idle-time ]", 0, },
1302 { "RATEGET", RATEGET
,OSTR
, 1, "[ <sp> get-throttle-rate ]", 0, },
1303 { "RATEPUT", RATEPUT
,OSTR
, 1, "[ <sp> put-throttle-rate ]", 0, },
1304 { "UMASK", UMASK
, ARGS
, 1, "[ <sp> umask ]", 0, },
1305 { NULL
, 0, 0, 0, 0, 0, }
1309 * Check if a filename is allowed to be modified (isupload == 0) or
1310 * uploaded (isupload == 1), and if necessary, check the filename is `sane'.
1311 * If the filename is NULL, fail.
1312 * If the filename is "", don't do the sane name check.
1315 check_write
(const char *file
, int isupload
)
1320 reply
(530, "Please login with USER and PASS.");
1323 /* checking modify */
1324 if
(! isupload
&& ! CURCLASS_FLAGS_ISSET
(modify
)) {
1325 reply
(502, "No permission to use this command.");
1328 /* checking upload */
1329 if
(isupload
&& ! CURCLASS_FLAGS_ISSET
(upload
)) {
1330 reply
(502, "No permission to use this command.");
1334 /* checking sanenames */
1335 if
(file
[0] != '\0' && CURCLASS_FLAGS_ISSET
(sanenames
)) {
1340 for
(p
= file
; *p
; p
++) {
1341 if
(isalnum
((unsigned char)*p
) ||
*p
== '-' ||
*p
== '+' ||
1342 *p
== ',' ||
*p
== '.' ||
*p
== '_')
1345 reply
(553, "File name `%s' not allowed.", file
);
1353 lookup
(struct tab
*p
, const char *cmd
)
1356 for
(; p
->name
!= NULL
; p
++)
1357 if
(strcasecmp
(cmd
, p
->name
) == 0)
1362 #include <arpa/telnet.h>
1365 * get_line - a hacked up version of fgets to ignore TELNET escape codes.
1366 * `s' is the buffer to read into.
1367 * `n' is the 1 less than the size of the buffer, to allow trailing NUL
1368 * `iop' is the FILE to read from.
1369 * Returns 0 on success, -1 on EOF, -2 if the command was too long.
1372 get_line
(char *s
, int n
, FILE *iop
)
1378 /* tmpline may contain saved command from urgent mode interruption */
1379 for
(c
= 0; tmpline
[c
] != '\0' && --n
> 0; ++c
) {
1381 if
(tmpline
[c
] == '\n') {
1384 syslog
(LOG_DEBUG
, "command: %s", s
);
1391 while
((c
= getc
(iop
)) != EOF
) {
1396 if
((c
= getc
(iop
)) != EOF
) {
1406 cprintf
(stdout
, "%c%c%c", IAC
, DONT
, 0377&c
);
1407 (void) fflush
(stdout
);
1414 cprintf
(stdout
, "%c%c%c", IAC
, WONT
, 0377&c
);
1415 (void) fflush
(stdout
);
1420 continue
; /* ignore command */
1427 * If command doesn't fit into buffer, discard the
1428 * rest of the command and indicate truncation.
1429 * This prevents the command to be split up into
1430 * multiple commands.
1434 "command too long, last char: %d", c
);
1435 while
(c
!= '\n' && (c
= getc
(iop
)) != EOF
)
1442 if
(c
== EOF
&& cs
== s
)
1446 if
((curclass.type
!= CLASS_GUEST
&&
1447 strncasecmp
(s
, "PASS ", 5) == 0) ||
1448 strncasecmp
(s
, "ACCT ", 5) == 0) {
1449 /* Don't syslog passwords */
1450 syslog
(LOG_DEBUG
, "command: %.4s ???", s
);
1455 /* Don't syslog trailing CR-LF */
1458 while
(cp
>= s
&& (*cp
== '\n' ||
*cp
== '\r')) {
1462 syslog
(LOG_DEBUG
, "command: %.*s", len
, s
);
1469 ftp_handle_line
(char *cp
)
1482 (void) alarm
(curclass.timeout
);
1483 ret
= get_line
(cbuf
, sizeof
(cbuf
)-1, stdin
);
1486 reply
(221, "You could at least say goodbye.");
1488 } else if
(ret
== -2) {
1489 reply
(500, "Command too long.");
1491 ftp_handle_line
(cbuf
);
1500 static int cpos
, state
;
1510 if
((cp
= strchr
(cmdp
, '\r'))) {
1512 #if defined(HAVE_SETPROCTITLE)
1513 if
(strncasecmp
(cmdp
, "PASS", 4) != 0 &&
1514 strncasecmp
(cmdp
, "ACCT", 4) != 0)
1515 setproctitle
("%s: %s", proctitle
, cmdp
);
1516 #endif /* defined(HAVE_SETPROCTITLE) */
1520 if
((cp
= strpbrk
(cmdp
, " \n")))
1526 p
= lookup
(cmdtab
, cmdp
);
1529 if
(is_oob
&& ! CMD_OOB
(p
)) {
1530 /* command will be handled in-band */
1532 } else if
(! CMD_IMPLEMENTED
(p
)) {
1533 reply
(502, "%s command not implemented.",
1539 yylval.cs
= p
->name
;
1545 if
(cmdp
[cpos
] == ' ') {
1550 if
((cp2
= strpbrk
(cp
, " \n")))
1554 p
= lookup
(sitetab
, cp
);
1557 if
(!CMD_IMPLEMENTED
(p
)) {
1558 reply
(502, "SITE %s command not implemented.",
1564 yylval.cs
= p
->name
;
1570 if
(cmdp
[cpos
] == '\n') {
1579 if
(cmdp
[cpos
] == ' ') {
1581 state
= state
== OSTR ? STR2
: state
+1;
1587 if
(cmdp
[cpos
] == '\n') {
1598 * Make sure the string is nonempty and \n terminated.
1600 if
(n
> 1 && cmdp
[cpos
] == '\n') {
1602 yylval.s
= ftpd_strdup
(cp
);
1610 if
(cmdp
[cpos
] == ' ') {
1614 if
(isdigit
((unsigned char)cmdp
[cpos
])) {
1616 while
(isdigit
((unsigned char)cmdp
[++cpos
]))
1620 yylval.u.i
= atoi
(cp
);
1629 if
(isdigit
((unsigned char)cmdp
[cpos
])) {
1631 while
(isdigit
((unsigned char)cmdp
[++cpos
]))
1635 yylval.u.i
= atoi
(cp
);
1636 yylval.u.ll
= STRTOLL
(cp
, NULL
, 10);
1640 if
(strncasecmp
(&cmdp
[cpos
], "ALL", 3) == 0
1641 && !isalnum
((unsigned char)cmdp
[cpos
+ 3])) {
1645 switch
(cmdp
[cpos
++]) {
1709 if
(cmdp
[cpos
] == '\n') {
1715 reply
(501, "'%s' command does not take any arguments.", cmdp
);
1725 fatal
("Unknown state in scanner.");
1734 yyerror(const char *s
)
1738 if
(hasyyerrored || is_oob
)
1740 if
((cp
= strchr
(cmdp
,'\n')) != NULL
)
1742 reply
(500, "'%s': command not understood.", cmdp
);
1747 help
(struct tab
*ctab
, const char *s
)
1753 if
(ctab
== sitetab
)
1757 width
= 0, NCMDS
= 0;
1758 for
(c
= ctab
; c
->name
!= NULL
; c
++) {
1759 int len
= strlen
(c
->name
);
1765 width
= (width
+ 8) &~
7;
1770 reply
(-214, "%s", "");
1771 reply
(0, "The following %scommands are recognized.", htype
);
1772 reply
(0, "(`-' = not implemented, `+' = supports options)");
1773 columns
= 76 / width
;
1776 lines
= (NCMDS
+ columns
- 1) / columns
;
1777 for
(i
= 0; i
< lines
; i
++) {
1778 cprintf
(stdout
, " ");
1779 for
(j
= 0; j
< columns
; j
++) {
1780 c
= ctab
+ j
* lines
+ i
;
1781 cprintf
(stdout
, "%s", c
->name
);
1782 w
= strlen
(c
->name
);
1783 if
(! CMD_IMPLEMENTED
(c
)) {
1787 if
(CMD_HAS_OPTIONS
(c
)) {
1791 if
(c
+ lines
>= &ctab
[NCMDS
])
1798 cprintf
(stdout
, "\r\n");
1800 (void) fflush
(stdout
);
1801 reply
(214, "Direct comments to ftp-bugs@%s.", hostname
);
1804 c
= lookup
(ctab
, s
);
1805 if
(c
== (struct tab
*)0) {
1806 reply
(502, "Unknown command '%s'.", s
);
1809 if
(CMD_IMPLEMENTED
(c
))
1810 reply
(214, "Syntax: %s%s %s", htype
, c
->name
, c
->help
);
1812 reply
(504, "%s%-*s\t%s; not implemented.", htype
, width
,
1817 * Check that the structures used for a PORT, LPRT or EPRT command are
1818 * valid (data_dest, his_addr), and if necessary, detect ftp bounce attacks.
1819 * If family != -1 check that his_addr.su_family == family.
1822 port_check
(const char *cmd
, int family
)
1824 char h1
[NI_MAXHOST
], h2
[NI_MAXHOST
];
1825 char s1
[NI_MAXHOST
], s2
[NI_MAXHOST
];
1826 #ifdef NI_WITHSCOPEID
1827 const int niflags
= NI_NUMERICHOST | NI_NUMERICSERV | NI_WITHSCOPEID
;
1829 const int niflags
= NI_NUMERICHOST | NI_NUMERICSERV
;
1833 reply
(501, "%s disallowed after EPSV ALL", cmd
);
1837 if
(family
!= -1 && his_addr.su_family
!= family
) {
1839 reply
(500, "Illegal %s command rejected", cmd
);
1843 if
(data_dest.su_family
!= his_addr.su_family
)
1844 goto port_check_fail
;
1846 /* be paranoid, if told so */
1847 if
(CURCLASS_FLAGS_ISSET
(checkportcmd
)) {
1850 * be paranoid, there are getnameinfo implementation that does
1851 * not present scopeid portion
1853 if
(data_dest.su_family
== AF_INET6
&&
1854 data_dest.su_scope_id
!= his_addr.su_scope_id
)
1855 goto port_check_fail
;
1858 if
(getnameinfo
((struct sockaddr
*)&data_dest
, data_dest.su_len
,
1859 h1
, sizeof
(h1
), s1
, sizeof
(s1
), niflags
))
1860 goto port_check_fail
;
1861 if
(getnameinfo
((struct sockaddr
*)&his_addr
, his_addr.su_len
,
1862 h2
, sizeof
(h2
), s2
, sizeof
(s2
), niflags
))
1863 goto port_check_fail
;
1865 if
(atoi
(s1
) < IPPORT_RESERVED || strcmp
(h1
, h2
) != 0)
1866 goto port_check_fail
;
1871 (void) close
(pdata
);
1874 reply
(200, "%s command successful.", cmd
);