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NetBSD/libexec/ftpd/extern.h
lukem d85f3bb159 * make checkportcmd the default. this breaks third-party proxy ftp but 
prevents the ftp bounce attack, and we should be secure out of the
  box, not require users to tweak obscure stuff.
* allow the version string reported to clients to be changed with '-V vers'.
  if vers is empty or `-', don't report a version.
* if -r is given, permanently drop root privs
* if not a REAL user (i.e, GUEST or CHROOT), and ftpd is running on a port
  > IPPORT_RESERVED+1, permanently drop root privs
* don't bother reverting to root privs to logout of wtmp/utmp; since the
  file descriptor is already open this isn't necessary.
* fix the binding of the port for the PORT/LPRT/EPRT connection to be the
  ctrl_addr.su_port-1, not hardcoded to `20' (this was broken in the ipv6
  merge). if root privs have been dropped, and this would be a port <
  IPPORT_RESERVED, use a random port instead (which isn't RFC959 compliant
  but it doesn't appear that many clients care).
* prevent login of a new user if privs have been dropped and already logged
  in as a REAL user (existing check already stops GUEST & CHROOT users).
* move the port check stuff into a separate port_check() function, and use
  for PORT, LPRT, and EPRT checks. inspired by freebsd
* minor KNF
* minor man page cleanup
2000-07-23 14:40:48 +00:00

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/* $NetBSD: extern.h,v 1.31 2000/07/23 14:40:48 lukem Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)extern.h 8.2 (Berkeley) 4/4/94
*/
/*-
* Copyright (c) 1997-2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (C) 1997 and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
void blkfree(char **);
void closedataconn(FILE *);
char *conffilename(const char *);
char **copyblk(char **);
void count_users(void);
void cprintf(FILE *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
void cwd(const char *);
FILE *dataconn(const char *, off_t, const char *);
void delete(const char *);
int display_file(const char *, int);
char **do_conversion(const char *);
void dologout(int);
void fatal(const char *);
void feat(void);
void format_path(char *, const char *);
int ftpd_pclose(FILE *);
FILE *ftpd_popen(char *[], const char *, int);
char *getline(char *, int, FILE *);
void init_curclass(void);
void logcmd(const char *, off_t, const char *, const char *,
const struct timeval *, const char *);
void logwtmp(const char *, const char *, const char *);
struct tab *lookup(struct tab *, const char *);
void makedir(const char *);
void mlsd(const char *);
void mlst(const char *);
void opts(const char *);
void parse_conf(const char *);
void pass(const char *);
void passive(void);
void long_passive(char *, int);
void perror_reply(int, const char *);
void pwd(void);
void removedir(const char *);
void renamecmd(const char *, const char *);
char *renamefrom(const char *);
void reply(int, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
void retrieve(char *[], const char *);
void send_file_list(const char *);
void show_chdir_messages(int);
void sizecmd(const char *);
void statcmd(void);
void statfilecmd(const char *);
void store(const char *, const char *, int);
int strsuftoi(const char *);
void user(const char *);
char *xstrdup(const char *);
void yyerror(char *);
typedef long long qdfmt_t;
typedef unsigned long long qufmt_t;
typedef enum {
CLASS_GUEST,
CLASS_CHROOT,
CLASS_REAL
} class_ft;
struct tab {
char *name;
short token;
short state;
short flags; /* 1 if command implemented, 2 if has options */
char *help;
char *options;
};
struct ftpconv {
struct ftpconv *next;
char *suffix; /* Suffix of requested name */
char *types; /* Valid file types */
char *disable; /* File to disable conversions */
char *command; /* Command to do the conversion */
};
struct ftpclass {
int checkportcmd; /* Check PORT commands are valid */
char *chroot; /* Directory to chroot(2) to at login */
char *classname; /* Current class */
struct ftpconv *conversions; /* List of conversions */
char *display; /* Files to display upon chdir */
char *homedir; /* Directory to chdir(2) to at login */
int limit; /* Max connections (-1 = unlimited) */
char *limitfile; /* File to display if limit reached */
int maxrateget; /* Maximum get transfer rate throttle */
int maxrateput; /* Maximum put transfer rate throttle */
unsigned int maxtimeout; /* Maximum permitted timeout */
int modify; /* Allow CHMOD, DELE, MKD, RMD, RNFR,
UMASK */
char *motd; /* MotD file to display after login */
char *notify; /* Files to notify about upon chdir */
int passive; /* Allow PASV mode */
int portmin; /* Minumum port for passive mode */
int portmax; /* Maximum port for passive mode */
int rateget; /* Get (RETR) transfer rate throttle */
int rateput; /* Put (STOR) transfer rate throttle */
unsigned int timeout; /* Default timeout */
class_ft type; /* Class type */
mode_t umask; /* Umask to use */
int upload; /* As per modify, but also allow
APPE, STOR, STOU */
};
#include <netinet/in.h>
union sockunion {
struct sockinet {
u_char si_len;
u_char si_family;
u_short si_port;
} su_si;
struct sockaddr_in su_sin;
struct sockaddr_in6 su_sin6;
};
#define su_len su_si.si_len
#define su_family su_si.si_family
#define su_port su_si.si_port
extern int yyparse(void);
#ifndef GLOBAL
#define GLOBAL extern
#endif
GLOBAL union sockunion ctrl_addr;
GLOBAL union sockunion data_dest;
GLOBAL union sockunion data_source;
GLOBAL union sockunion his_addr;
GLOBAL union sockunion pasv_addr;
GLOBAL int connections;
GLOBAL struct ftpclass curclass;
GLOBAL int debug;
GLOBAL jmp_buf errcatch;
GLOBAL int form;
GLOBAL int gidcount; /* number of entries in gidlist[] */
GLOBAL gid_t gidlist[NGROUPS_MAX];
GLOBAL int hasyyerrored;
GLOBAL char hostname[MAXHOSTNAMELEN+1];
GLOBAL char homedir[MAXPATHLEN];
#ifdef KERBEROS5
GLOBAL krb5_context kcontext;
#endif
GLOBAL int logged_in;
GLOBAL int logging;
GLOBAL int pdata; /* for passive mode */
#ifdef HASSETPROCTITLE
GLOBAL char proctitle[BUFSIZ]; /* initial part of title */
#endif
GLOBAL struct passwd *pw;
GLOBAL int quietmessages;
GLOBAL char remotehost[MAXHOSTNAMELEN+1];
GLOBAL off_t restart_point;
GLOBAL char tmpline[7];
GLOBAL sig_atomic_t transflag;
GLOBAL int type;
GLOBAL int usedefault; /* for data transfers */
GLOBAL const char *version;
/* total file data bytes */
GLOBAL off_t total_data_in, total_data_out, total_data;
/* total number of data files */
GLOBAL off_t total_files_in, total_files_out, total_files;
/* total bytes */
GLOBAL off_t total_bytes_in, total_bytes_out, total_bytes;
/* total number of xfers */
GLOBAL off_t total_xfers_in, total_xfers_out, total_xfers;
extern struct tab cmdtab[];
#define INTERNAL_LS "/bin/ls"
#define CMD_IMPLEMENTED(x) ((x)->flags != 0)
#define CMD_HAS_OPTIONS(x) ((x)->flags == 2)
#define CPUTC(c, f) do { \
putc(c, f); total_bytes++; total_bytes_out++; \
} while (0);
#define CURCLASSTYPE curclass.type == CLASS_GUEST ? "GUEST" : \
curclass.type == CLASS_CHROOT ? "CHROOT" : \
curclass.type == CLASS_REAL ? "REAL" : \
"<unknown>"
#define ISDOTDIR(x) (x[0] == '.' && x[1] == '\0')
#define ISDOTDOTDIR(x) (x[0] == '.' && x[1] == '.' && x[2] == '\0')
#define EMPTYSTR(p) ((p) == NULL || *(p) == '\0')
#define NEXTWORD(P, W) do { \
(W) = strsep(&(P), " \t"); \
} while ((W) != NULL && *(W) == '\0')
#define PLURAL(s) ((s) == 1 ? "" : "s")
#define REASSIGN(X,Y) do { if (X) free(X); (X)=(Y); } while (/*CONSTCOND*/0)
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