635a375704
* Fix yacc parser error recovery so that setjmp(3)/longjmp(3) is unnecessary. * Fix SIGURG handler to set an urgflag that's later tested, rather than abusing setjmp(3)/longjmp(3). * Use "volatile sig_atomic_t" as the type of variables modified by sig handlers. * Use sigaction(3) instead of signal(3) to set the signal handlers. * Only set the main SIGALRM handler once. If we need to change it, cache the old handler and restore appropriately... * Remove a bunch of signal races by improving the signal handlers. * Fix memory leak with 'ESPV ALL'. My stuff: * Clean up the debug message in reply(); use vsnprintf(3) instead of vsyslog(3). * Rework parsing of OOB commands to _not_ use the yacc parser, since the latter isn't reentrant and the hacks to work around that are ugly. We now examine urgflag at appropriate locations and call handleoobcmd() if it's set. Since the only OOB commands we currently implement are ABOR and STAT, this isn't an issue. (I also can't find the reference in RFC2228 where MIC, CONF & ENC are OOB-only commands. Go figure.) I could clean up the is_oob stuff some more, but the remaining stuff in ftpcmd.y is harmless and it's unnecessary churn right this moment.
379 lines
13 KiB
C
379 lines
13 KiB
C
/* $NetBSD: extern.h,v 1.50 2004/08/09 12:56:47 lukem Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)extern.h 8.2 (Berkeley) 4/4/94
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*/
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/*-
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* Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (C) 1997 and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef NO_LONG_LONG
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# define LLF "%ld"
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# define LLFP(x) "%" x "ld"
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# define LLT long
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# define ULLF "%lu"
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# define ULLFP(x) "%" x "lu"
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# define ULLT unsigned long
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# define STRTOLL(x,y,z) strtol(x,y,z)
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# define LLTMIN LONG_MIN
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# define LLTMAX LONG_MAX
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#else
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# define LLF "%lld"
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# define LLFP(x) "%" x "lld"
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# define LLT long long
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# define ULLF "%llu"
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# define ULLFP(x) "%" x "llu"
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# define ULLT unsigned long long
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# define STRTOLL(x,y,z) strtoll(x,y,z)
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# define LLTMIN LLONG_MIN
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# define LLTMAX LLONG_MAX
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#endif
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#define FTP_BUFLEN 512
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void abor(void);
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void blkfree(char **);
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void closedataconn(FILE *);
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char *conffilename(const char *);
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char **copyblk(char **);
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void count_users(void);
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void cprintf(FILE *, const char *, ...)
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__attribute__((__format__(__printf__, 2, 3)));
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void cwd(const char *);
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FILE *dataconn(const char *, off_t, const char *);
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void delete(const char *);
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int display_file(const char *, int);
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char **do_conversion(const char *);
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void dologout(int);
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void fatal(const char *);
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void feat(void);
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void format_path(char *, const char *);
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int ftpd_pclose(FILE *);
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FILE *ftpd_popen(char *[], const char *, int);
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char *getline(char *, int, FILE *);
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void init_curclass(void);
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void logxfer(const char *, off_t, const char *, const char *,
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const struct timeval *, const char *);
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struct tab *lookup(struct tab *, const char *);
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void makedir(const char *);
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void mlsd(const char *);
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void mlst(const char *);
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void opts(const char *);
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void parse_conf(const char *);
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void pass(const char *);
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void passive(void);
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int lpsvproto2af(int);
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int af2lpsvproto(int);
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int epsvproto2af(int);
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int af2epsvproto(int);
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void long_passive(char *, int);
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int extended_port(const char *);
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void epsv_protounsupp(const char *);
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void perror_reply(int, const char *);
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void pwd(void);
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void removedir(const char *);
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void renamecmd(const char *, const char *);
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char *renamefrom(const char *);
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void reply(int, const char *, ...)
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__attribute__((__format__(__printf__, 2, 3)));
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void retrieve(char *[], const char *);
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void send_file_list(const char *);
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void show_chdir_messages(int);
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void sizecmd(const char *);
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void statcmd(void);
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void statfilecmd(const char *);
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void statxfer(void);
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void store(const char *, const char *, int);
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void user(const char *);
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char *xstrdup(const char *);
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void yyerror(char *);
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#ifdef SUPPORT_UTMP
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struct utmp;
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void ftpd_logwtmp(const char *, const char *, const char *);
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void ftpd_login(const struct utmp *ut);
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int ftpd_logout(const char *line);
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#endif
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#ifdef SUPPORT_UTMPX
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struct utmpx;
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void ftpd_loginx(const struct utmpx *);
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void ftpd_logwtmpx(const char *, const char *, const char *, int, int);
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#endif
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#include <netinet/in.h>
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#if defined(__NetBSD__)
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# define HAVE_SETPROCTITLE 1
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# define HAVE_SOCKADDR_SA_LEN 1
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#endif
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struct sockinet {
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union sockunion {
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struct sockaddr_in su_sin;
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#ifdef INET6
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struct sockaddr_in6 su_sin6;
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#endif
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} si_su;
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#if !HAVE_SOCKADDR_SA_LEN
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int si_len;
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#endif
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};
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#if !HAVE_SOCKADDR_SA_LEN
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# define su_len si_len
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#else
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# define su_len si_su.su_sin.sin_len
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#endif
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#define su_addr si_su.su_sin.sin_addr
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#define su_family si_su.su_sin.sin_family
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#define su_port si_su.su_sin.sin_port
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#ifdef INET6
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# define su_6addr si_su.su_sin6.sin6_addr
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# define su_scope_id si_su.su_sin6.sin6_scope_id
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#endif
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struct tab {
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char *name;
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short token;
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short state;
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short flags; /* 1 if command implemented, 2 if has options,
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4 if can occur OOB */
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char *help;
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char *options;
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};
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struct ftpconv {
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struct ftpconv *next;
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char *suffix; /* Suffix of requested name */
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char *types; /* Valid file types */
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char *disable; /* File to disable conversions */
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char *command; /* Command to do the conversion */
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};
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typedef enum {
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CLASS_GUEST,
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CLASS_CHROOT,
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CLASS_REAL
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} class_ft;
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typedef enum {
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FLAG_checkportcmd = 1<<0, /* Check port commands */
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FLAG_denyquick = 1<<1, /* Check ftpusers(5) before PASS */
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FLAG_modify = 1<<2, /* Allow CHMOD, DELE, MKD, RMD, RNFR,
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UMASK */
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FLAG_passive = 1<<3, /* Allow PASV mode */
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FLAG_private = 1<<4, /* Don't publish class info in STAT */
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FLAG_sanenames = 1<<5, /* Restrict names of uploaded files */
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FLAG_upload = 1<<6, /* As per modify, but also allow
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APPE, STOR, STOU */
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} classflag_t;
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#define CURCLASS_FLAGS_SET(x) (curclass.flags |= (FLAG_ ## x))
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#define CURCLASS_FLAGS_CLR(x) (curclass.flags &= ~(FLAG_ ## x))
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#define CURCLASS_FLAGS_ISSET(x) (curclass.flags & (FLAG_ ## x))
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struct ftpclass {
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struct sockinet advertise; /* PASV address to advertise as */
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char *chroot; /* Directory to chroot(2) to at login */
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char *classname; /* Current class */
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struct ftpconv *conversions; /* List of conversions */
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char *display; /* File to display upon chdir */
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char *homedir; /* Directory to chdir(2) to at login */
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classflag_t flags; /* Flags; see classflag_t above */
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LLT limit; /* Max connections (-1 = unlimited) */
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char *limitfile; /* File to display if limit reached */
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LLT maxfilesize; /* Maximum file size of uploads */
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LLT maxrateget; /* Maximum get transfer rate throttle */
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LLT maxrateput; /* Maximum put transfer rate throttle */
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LLT maxtimeout; /* Maximum permitted timeout */
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char *motd; /* MotD file to display after login */
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char *notify; /* Files to notify about upon chdir */
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LLT portmin; /* Minumum port for passive mode */
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LLT portmax; /* Maximum port for passive mode */
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LLT rateget; /* Get (RETR) transfer rate throttle */
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LLT rateput; /* Put (STOR) transfer rate throttle */
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LLT timeout; /* Default timeout */
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class_ft type; /* Class type */
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mode_t umask; /* Umask to use */
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LLT mmapsize; /* mmap window size */
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LLT readsize; /* data read size */
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LLT writesize; /* data write size */
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LLT sendbufsize; /* SO_SNDBUF size */
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LLT sendlowat; /* SO_SNDLOWAT size */
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};
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extern void ftp_loop(void) __attribute__ ((noreturn));
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extern void ftp_handle_line(char *);
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#ifndef GLOBAL
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#define GLOBAL extern
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#endif
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GLOBAL struct sockinet ctrl_addr;
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GLOBAL struct sockinet data_dest;
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GLOBAL struct sockinet data_source;
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GLOBAL struct sockinet his_addr;
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GLOBAL struct sockinet pasv_addr;
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GLOBAL int connections;
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GLOBAL struct ftpclass curclass;
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GLOBAL int debug;
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GLOBAL char *emailaddr;
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GLOBAL int form;
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GLOBAL int gidcount; /* number of entries in gidlist[] */
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GLOBAL gid_t *gidlist;
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GLOBAL int hasyyerrored;
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GLOBAL char hostname[MAXHOSTNAMELEN+1];
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GLOBAL char homedir[MAXPATHLEN];
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#ifdef KERBEROS5
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GLOBAL krb5_context kcontext;
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#endif
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GLOBAL int logged_in;
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GLOBAL int logging;
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GLOBAL int pdata; /* for passive mode */
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#if HAVE_SETPROCTITLE
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GLOBAL char proctitle[BUFSIZ]; /* initial part of title */
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#endif
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GLOBAL struct passwd *pw;
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GLOBAL int quietmessages;
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GLOBAL char remotehost[MAXHOSTNAMELEN+1];
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GLOBAL off_t restart_point;
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GLOBAL char tmpline[FTP_BUFLEN];
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GLOBAL int type;
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GLOBAL int usedefault; /* for data transfers */
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GLOBAL const char *version;
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GLOBAL int is_oob;
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/* total file data bytes */
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GLOBAL off_t total_data_in, total_data_out, total_data;
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/* total number of data files */
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GLOBAL off_t total_files_in, total_files_out, total_files;
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/* total bytes */
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GLOBAL off_t total_bytes_in, total_bytes_out, total_bytes;
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/* total number of xfers */
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GLOBAL off_t total_xfers_in, total_xfers_out, total_xfers;
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extern struct tab cmdtab[];
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#define INTERNAL_LS "/bin/ls"
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#define CMD_IMPLEMENTED(x) ((x)->flags != 0)
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#define CMD_HAS_OPTIONS(x) ((x)->flags & 0x2)
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#define CMD_OOB(x) ((x)->flags & 0x4)
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#define CPUTC(c, f) do { \
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putc(c, f); total_bytes++; total_bytes_out++; \
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} while (0);
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#define CURCLASSTYPE curclass.type == CLASS_GUEST ? "GUEST" : \
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curclass.type == CLASS_CHROOT ? "CHROOT" : \
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curclass.type == CLASS_REAL ? "REAL" : \
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"<unknown>"
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#define ISDOTDIR(x) (x[0] == '.' && x[1] == '\0')
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#define ISDOTDOTDIR(x) (x[0] == '.' && x[1] == '.' && x[2] == '\0')
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#define EMPTYSTR(p) ((p) == NULL || *(p) == '\0')
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#define NEXTWORD(P, W) do { \
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(W) = strsep(&(P), " \t"); \
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} while ((W) != NULL && *(W) == '\0')
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#define PLURAL(s) ((s) == 1 ? "" : "s")
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#define REASSIGN(X,Y) do { if (X) free(X); (X)=(Y); } while (/*CONSTCOND*/0)
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#ifndef IPPORT_ANONMAX
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# define IPPORT_ANONMAX 65535
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#endif
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