libexec/ftpd/extern.h

   1 /*      $NetBSD: extern.h,v 1.63 2013/03/21 05:53:01 lukem Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)extern.h    8.2 (Berkeley) 4/4/94
  32  */
  33
  34 /*-
  35  * Copyright (c) 1997-2009 The NetBSD Foundation, Inc.
  36  * All rights reserved.
  37  *
  38  * This code is derived from software contributed to The NetBSD Foundation
  39  * by Luke Mewburn.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  51  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  52  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  53  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  54  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  55  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  56  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  57  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  58  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  59  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  60  * POSSIBILITY OF SUCH DAMAGE.
  61  */
  62
  63 /*
  64  * Copyright (C) 1997 and 1998 WIDE Project.
  65  * All rights reserved.
  66  *
  67  * Redistribution and use in source and binary forms, with or without
  68  * modification, are permitted provided that the following conditions
  69  * are met:
  70  * 1. Redistributions of source code must retain the above copyright
  71  *    notice, this list of conditions and the following disclaimer.
  72  * 2. Redistributions in binary form must reproduce the above copyright
  73  *    notice, this list of conditions and the following disclaimer in the
  74  *    documentation and/or other materials provided with the distribution.
  75  * 3. Neither the name of the project nor the names of its contributors
  76  *    may be used to endorse or promote products derived from this software
  77  *    without specific prior written permission.
  78  *
  79  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  80  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  81  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  82  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  83  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  84  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  85  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  86  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  87  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  88  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  89  * SUCH DAMAGE.
  90  */
  91
  92 #ifdef NO_LONG_LONG
  93 # define LLF            "%ld"
  94 # define LLFP(x)        "%" x "ld"
  95 # define LLT            long
  96 # define ULLF           "%lu"
  97 # define ULLFP(x)       "%" x "lu"
  98 # define ULLT           unsigned long
  99 # define STRTOLL(x,y,z) strtol(x,y,z)
 100 # define LLTMIN         LONG_MIN
 101 # define LLTMAX         LONG_MAX
 102 #else
 103 # define LLF            "%lld"
 104 # define LLFP(x)        "%" x "lld"
 105 # define LLT            long long
 106 # define ULLF           "%llu"
 107 # define ULLFP(x)       "%" x "llu"
 108 # define ULLT           unsigned long long
 109 # define STRTOLL(x,y,z) strtoll(x,y,z)
 110 # define LLTMIN         LLONG_MIN
 111 # define LLTMAX         LLONG_MAX
 112 #endif
 113
 114 #define FTP_BUFLEN      512
 115
 116 void    abor(void);
 117 void    closedataconn(FILE *);
 118 char   *conffilename(const char *);
 119 void    count_users(void);
 120 void    cprintf(FILE *, const char *, ...)
 121             __printflike(2, 3);
 122 void    cwd(const char *);
 123 FILE   *dataconn(const char *, off_t, const char *);
 124 void    delete(const char *);
 125 int     display_file(const char *, int);
 126 const char **do_conversion(const char *);
 127 __dead void     dologout(int);
 128 __dead void     fatal(const char *);
 129 void    feat(void);
 130 void    format_path(char *, const char *);
 131 int     ftpd_pclose(FILE *);
 132 FILE   *ftpd_popen(const char *[], const char *, int);
 133 int     get_line(char *, int, FILE *);
 134 void    init_curclass(void);
 135 void    logxfer(const char *, off_t, const char *, const char *,
 136             const struct timeval *, const char *);
 137 struct tab *lookup(struct tab *, const char *);
 138 void    makedir(const char *);
 139 void    mlsd(const char *);
 140 void    mlst(const char *);
 141 void    opts(const char *);
 142 void    parse_conf(const char *);
 143 void    pass(const char *);
 144 void    passive(void);
 145 int     lpsvproto2af(int);
 146 int     af2lpsvproto(int);
 147 int     epsvproto2af(int);
 148 int     af2epsvproto(int);
 149 void    long_passive(const char *, int);
 150 int     extended_port(const char *);
 151 void    epsv_protounsupp(const char *);
 152 void    perror_reply(int, const char *);
 153 void    pwd(void);
 154 void    removedir(const char *);
 155 void    renamecmd(const char *, const char *);
 156 char   *renamefrom(const char *);
 157 void    reply(int, const char *, ...)
 158             __printflike(2, 3);
 159 void    retrieve(const char *[], const char *);
 160 void    send_file_list(const char *);
 161 void    show_chdir_messages(int);
 162 void    sizecmd(const char *);
 163 void    statcmd(void);
 164 void    statfilecmd(const char *);
 165 void    statxfer(void);
 166 void    store(const char *, const char *, int);
 167 void    user(const char *);
 168 char   *ftpd_strdup(const char *);
 169 void    yyerror(const char *);
 170
 171 #ifdef SUPPORT_UTMP
 172 struct utmp;
 173
 174 void    ftpd_initwtmp(void);
 175 void    ftpd_logwtmp(const char *, const char *, const char *);
 176 void    ftpd_login(const struct utmp *);
 177 int     ftpd_logout(const char *);
 178 #endif
 179
 180 #ifdef SUPPORT_UTMPX
 181 struct utmpx;
 182 struct sockinet;
 183
 184 void    ftpd_initwtmpx(void);
 185 void    ftpd_logwtmpx(const char *, const char *, const char *,
 186     struct sockinet *, int, int);
 187 void    ftpd_loginx(const struct utmpx *);
 188 int     ftpd_logoutx(const char *, int, int);
 189 #endif
 190
 191 #include <netinet/in.h>
 192
 193 #if defined(__NetBSD__)
 194 # define HAVE_SETPROCTITLE              1
 195 # define HAVE_STRUCT_SOCKADDR_SA_LEN    1
 196 # define HAVE_SOCKADDR_SNPRINTF         1
 197 #endif
 198
 199 struct sockinet {
 200         union sockunion {
 201                 struct sockaddr_in  su_sin;
 202 #ifdef INET6
 203                 struct sockaddr_in6 su_sin6;
 204 #endif
 205         } si_su;
 206 #if !defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
 207         int     si_len;
 208 #endif
 209 };
 210
 211 #if !defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
 212 # define su_len         si_len
 213 #else
 214 # define su_len         si_su.su_sin.sin_len
 215 #endif
 216 #define su_addr         si_su.su_sin.sin_addr
 217 #define su_family       si_su.su_sin.sin_family
 218 #define su_port         si_su.su_sin.sin_port
 219 #ifdef INET6
 220 # define su_6addr       si_su.su_sin6.sin6_addr
 221 # define su_scope_id    si_su.su_sin6.sin6_scope_id
 222 #endif
 223
 224 struct tab {
 225         const char      *name;
 226         short           token;
 227         short           state;
 228         short           flags;  /* 1 if command implemented, 2 if has options,
 229                                    4 if can occur OOB */
 230         const char      *help;
 231         char            *options;
 232 };
 233
 234 struct ftpconv {
 235         struct ftpconv  *next;
 236         char            *suffix;        /* Suffix of requested name */
 237         char            *types;         /* Valid file types */
 238         char            *disable;       /* File to disable conversions */
 239         char            *command;       /* Command to do the conversion */
 240 };
 241
 242 typedef enum {
 243         CLASS_GUEST,
 244         CLASS_CHROOT,
 245         CLASS_REAL
 246 } class_ft;
 247
 248 typedef enum {
 249         FLAG_checkportcmd =     1<<0,   /* Check port commands */
 250         FLAG_denyquick =        1<<1,   /* Check ftpusers(5) before PASS */
 251         FLAG_hidesymlinks =     1<<2,   /* For symbolic links, list the file
 252                                            or directory the link references
 253                                            rather than the link itself */
 254         FLAG_modify =           1<<3,   /* Allow CHMOD, DELE, MKD, RMD, RNFR,
 255                                            UMASK */
 256         FLAG_passive =          1<<4,   /* Allow PASV mode */
 257         FLAG_private =          1<<5,   /* Don't publish class info in STAT */
 258         FLAG_sanenames =        1<<6,   /* Restrict names of uploaded files */
 259         FLAG_upload =           1<<7,   /* As per modify, but also allow
 260                                            APPE, STOR, STOU */
 261 } classflag_t;
 262
 263 #define CURCLASS_FLAGS_SET(x)   (curclass.flags |=  (FLAG_ ## x))
 264 #define CURCLASS_FLAGS_CLR(x)   (curclass.flags &= ~(FLAG_ ## x))
 265 #define CURCLASS_FLAGS_ISSET(x) (curclass.flags &   (FLAG_ ## x))
 266
 267 struct ftpclass {
 268         struct sockinet  advertise;     /* PASV address to advertise as */
 269         char            *chroot;        /* Directory to chroot(2) to at login */
 270         char            *classname;     /* Current class */
 271         struct ftpconv  *conversions;   /* List of conversions */
 272         char            *display;       /* File to display upon chdir */
 273         char            *homedir;       /* Directory to chdir(2) to at login */
 274         classflag_t      flags;         /* Flags; see classflag_t above */
 275         LLT              limit;         /* Max connections (-1 = unlimited) */
 276         char            *limitfile;     /* File to display if limit reached */
 277         LLT              maxfilesize;   /* Maximum file size of uploads */
 278         LLT              maxrateget;    /* Maximum get transfer rate throttle */
 279         LLT              maxrateput;    /* Maximum put transfer rate throttle */
 280         LLT              maxtimeout;    /* Maximum permitted timeout */
 281         char            *motd;          /* MotD file to display after login */
 282         char            *notify;        /* Files to notify about upon chdir */
 283         LLT              portmin;       /* Minumum port for passive mode */
 284         LLT              portmax;       /* Maximum port for passive mode */
 285         LLT              rateget;       /* Get (RETR) transfer rate throttle */
 286         LLT              rateput;       /* Put (STOR) transfer rate throttle */
 287         LLT              timeout;       /* Default timeout */
 288         class_ft         type;          /* Class type */
 289         mode_t           umask;         /* Umask to use */
 290         LLT              mmapsize;      /* mmap window size */
 291         LLT              readsize;      /* data read size */
 292         LLT              writesize;     /* data write size */
 293         LLT              recvbufsize;   /* SO_RCVBUF size */
 294         LLT              sendbufsize;   /* SO_SNDBUF size */
 295         LLT              sendlowat;     /* SO_SNDLOWAT size */
 296 };
 297
 298 __dead extern void              ftp_loop(void);
 299 extern void             ftp_handle_line(char *);
 300
 301 #ifndef GLOBAL
 302 #define GLOBAL  extern
 303 #endif
 304
 305
 306 GLOBAL  struct sockinet ctrl_addr;
 307 GLOBAL  struct sockinet data_dest;
 308 GLOBAL  struct sockinet data_source;
 309 GLOBAL  struct sockinet his_addr;
 310 GLOBAL  struct sockinet pasv_addr;
 311 GLOBAL  int             connections;
 312 GLOBAL  struct ftpclass curclass;
 313 GLOBAL  int             ftpd_debug;
 314 GLOBAL  char            *emailaddr;
 315 GLOBAL  int             form;
 316 GLOBAL  int             gidcount;       /* number of entries in gidlist[] */
 317 GLOBAL  gid_t           *gidlist;
 318 GLOBAL  int             hasyyerrored;
 319 GLOBAL  char            hostname[MAXHOSTNAMELEN+1];
 320 GLOBAL  char            homedir[MAXPATHLEN];
 321 #ifdef KERBEROS5
 322 GLOBAL  krb5_context    kcontext;
 323 #endif
 324 GLOBAL  int             logged_in;
 325 GLOBAL  int             logging;
 326 GLOBAL  int             pdata;                  /* for passive mode */
 327 #if defined(HAVE_SETPROCTITLE)
 328 GLOBAL  char            proctitle[BUFSIZ];      /* initial part of title */
 329 #endif
 330 GLOBAL  struct passwd  *pw;
 331 GLOBAL  int             quietmessages;
 332 GLOBAL  char            remotehost[MAXHOSTNAMELEN+1];
 333 GLOBAL  char            remoteloghost[2 * MAXHOSTNAMELEN+1];
 334 GLOBAL  off_t           restart_point;
 335 GLOBAL  char            tmpline[FTP_BUFLEN];
 336 GLOBAL  int             type;
 337 GLOBAL  int             usedefault;             /* for data transfers */
 338 GLOBAL  const char     *version;
 339 GLOBAL  int             is_oob;
 340
 341                                                 /* total file data bytes */
 342 GLOBAL  off_t           total_data_in,  total_data_out,  total_data;
 343                                                 /* total number of data files */
 344 GLOBAL  off_t           total_files_in, total_files_out, total_files;
 345                                                 /* total bytes */
 346 GLOBAL  off_t           total_bytes_in, total_bytes_out, total_bytes;
 347                                                 /* total number of xfers */
 348 GLOBAL  off_t           total_xfers_in, total_xfers_out, total_xfers;
 349
 350 extern  struct tab      cmdtab[];
 351
 352 #define INTERNAL_LS     "/bin/ls"
 353
 354
 355 #define CMD_IMPLEMENTED(x)      ((x)->flags != 0)
 356 #define CMD_HAS_OPTIONS(x)      ((x)->flags & 0x2)
 357 #define CMD_OOB(x)              ((x)->flags & 0x4)
 358
 359 #define CPUTC(c, f)     do { \
 360                                 putc(c, f); total_bytes++; total_bytes_out++; \
 361                         } while (0);
 362
 363 #define CURCLASSTYPE    curclass.type == CLASS_GUEST  ? "GUEST"  : \
 364                         curclass.type == CLASS_CHROOT ? "CHROOT" : \
 365                         curclass.type == CLASS_REAL   ? "REAL"   : \
 366                         "<unknown>"
 367
 368 #define ISDOTDIR(x)     (x[0] == '.' && x[1] == '\0')
 369 #define ISDOTDOTDIR(x)  (x[0] == '.' && x[1] == '.' && x[2] == '\0')
 370
 371 #define EMPTYSTR(p)     ((p) == NULL || *(p) == '\0')
 372 #define NEXTWORD(P, W)  do { \
 373                                 (W) = strsep(&(P), " \t"); \
 374                         } while ((W) != NULL && *(W) == '\0')
 375 #define PLURAL(s)       ((s) == 1 ? "" : "s")
 376 #define REASSIGN(X,Y)   do { if (X) free(X); (X)=(Y); } while (/*CONSTCOND*/0)
 377
 378 #ifndef IPPORT_ANONMAX
 379 # define IPPORT_ANONMAX 65535
 380 #endif