crypto/dist/heimdal/appl/popper/popper.h

   1 /*
   2  * Copyright (c) 1989 Regents of the University of California.
   3  * All rights reserved.  The Berkeley software License Agreement
   4  * specifies the terms and conditions for redistribution.
   5  *
   6  * static char copyright[] = "Copyright (c) 1990 Regents of the University of California.\nAll rights reserved.\n";
   7  * static char SccsId[] = "@(#)@(#)popper.h     2.2  2.2 4/2/91";
   8  *
   9  */
  10
  11 /* $Heimdal: popper.h 14045 2004-07-14 09:10:30Z joda $
  12    $NetBSD$ */
  13
  14 /*
  15  *  Header file for the POP programs
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #define UIDL
  21 #define XOVER
  22 #define XDELE
  23 #define DEBUG
  24 #define RETURN_PATH_HANDLING
  25 #endif
  26
  27 /* Common include files */
  28
  29 #include <stdio.h>
  30 #include <stdarg.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <errno.h>
  34 #include <signal.h>
  35 #include <setjmp.h>
  36 #include <ctype.h>
  37 #ifdef HAVE_FCNTL_H
  38 #include <fcntl.h>
  39 #endif
  40 #ifdef HAVE_PWD_H
  41 #include <pwd.h>
  42 #endif
  43 #ifdef HAVE_SYS_TYPES_H
  44 #include <sys/types.h>
  45 #endif
  46 #ifdef HAVE_IO_H
  47 #include <io.h>
  48 #endif
  49 #ifdef HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52 #ifdef HAVE_SYS_STAT_H
  53 #include <sys/stat.h>
  54 #endif
  55 #ifdef HAVE_SYS_FILE_H
  56 #include <sys/file.h>
  57 #endif
  58 #ifdef TIME_WITH_SYS_TIME
  59 #include <sys/time.h>
  60 #include <time.h>
  61 #elif defined(HAVE_SYS_TIME_H)
  62 #include <sys/time.h>
  63 #else
  64 #include <time.h>
  65 #endif
  66 #ifdef HAVE_SYS_RESOURCE_H
  67 #include <sys/resource.h>
  68 #endif
  69 #ifdef HAVE_SYS_WAIT_H
  70 #include <sys/wait.h>
  71 #endif
  72 #ifdef HAVE_SYS_SOCKET_H
  73 #include <sys/socket.h>
  74 #endif
  75 #ifdef HAVE_NETINET_IN_H
  76 #include <netinet/in.h>
  77 #endif
  78 #ifdef HAVE_NETINET_IN6_H
  79 #include <netinet/in6.h>
  80 #endif
  81 #ifdef HAVE_NETINET6_IN6_H
  82 #include <netinet6/in6.h>
  83 #endif
  84
  85 #ifdef HAVE_NETDB_H
  86 #include <netdb.h>
  87 #endif
  88 #ifdef HAVE_ARPA_INET_H
  89 #ifdef _AIX
  90 struct sockaddr_dl; /* AIX fun */
  91 struct ether_addr;
  92 #endif
  93 #include <arpa/inet.h>
  94 #endif
  95 #ifdef HAVE_SYSLOG_H
  96 #include <syslog.h>
  97 #endif
  98 #ifdef HAVE_SYS_SELECT_H
  99 #include <sys/select.h>
 100 #endif
 101 #ifdef HAVE_SYS_PARAM_H
 102 #include <sys/param.h>
 103 #endif
 104 #include "version.h"
 105
 106 #ifdef SOCKS
 107 #include <socks.h>
 108 #endif
 109
 110 #include <err.h>
 111 #include <roken.h>
 112 #include <getarg.h>
 113
 114 #ifdef KRB4
 115 #include <krb.h>
 116 #include <prot.h>
 117 #endif
 118 #ifdef KRB5
 119 #include <krb5.h>
 120 #endif
 121
 122 #define MAXUSERNAMELEN  65
 123 #define MAXLINELEN      1024
 124 #define MAXMSGLINELEN   1024
 125 #define MAXCMDLEN       4
 126 #define MAXPARMCOUNT    10
 127 #define MAXPARMLEN      10
 128 #define ALLOC_MSGS  20
 129 #define MAIL_COMMAND    "/usr/lib/sendmail"
 130
 131 #define POP_FACILITY    LOG_LOCAL0
 132 #define POP_PRIORITY    LOG_NOTICE
 133 #define POP_DEBUG       LOG_DEBUG
 134 #define POP_INFO        LOG_INFO
 135 #define POP_LOGOPTS     0
 136
 137 #ifdef HAVE_PATHS_H
 138 #include <paths.h>
 139 #endif
 140 #ifdef HAVE_MAILLOCK_H
 141 #include <maillock.h>
 142 #endif
 143
 144 #ifdef OTP
 145 #include <otp.h>
 146 #endif
 147
 148 #if defined(KRB4_MAILDIR)
 149 #define POP_MAILDIR     KRB4_MAILDIR
 150 #elif defined(_PATH_MAILDIR)
 151 #define POP_MAILDIR     _PATH_MAILDIR
 152 #elif defined(MAILDIR)
 153 #define POP_MAILDIR     MAILDIR
 154 #else
 155 #define POP_MAILDIR     "/usr/spool/mail"
 156 #endif
 157
 158 #define POP_DROP        POP_MAILDIR "/.%s.pop"
 159         /* POP_TMPSIZE needs to be big enough to hold the string
 160          * defined by POP_TMPDROP.  POP_DROP and POP_TMPDROP
 161          * must be in the same filesystem.
 162          */
 163 #define POP_TMPDROP     POP_MAILDIR "/tmpXXXXXX"
 164 #define POP_TMPSIZE     256
 165 #define POP_TMPXMIT     "/tmp/xmitXXXXXX"
 166 #define POP_OK          "+OK"
 167 #define POP_ERR         "-ERR"
 168 #define POP_SUCCESS     1
 169 #define POP_FAILURE     0
 170 #define POP_TERMINATE   '.'
 171 #define POP_TIMEOUT     120     /* timeout connection after this many secs */
 172
 173 extern int              pop_timeout;
 174
 175 extern int              hangup;
 176
 177 #define AUTH_NONE 0
 178 #define AUTH_OTP  1
 179 #define AUTH_SASL 2
 180
 181 #define pop_command         pop_parm[0]     /*  POP command is first token */
 182 #define pop_subcommand      pop_parm[1]     /*  POP XTND subcommand is the
 183                                                 second token */
 184
 185 typedef enum {                              /*  POP processing states */
 186     auth1,                                  /*  Authorization: waiting for
 187                                                 USER command */
 188     auth2,                                  /*  Authorization: waiting for
 189                                                 PASS command */
 190     trans,                                  /*  Transaction */
 191     update,                                 /*  Update:  session ended,
 192                                                 process maildrop changes */
 193     halt,                                   /*  (Halt):  stop processing
 194                                                 and exit */
 195     error                                   /*  (Error): something really
 196                                                 bad happened */
 197 } state;
 198
 199
 200 #define DEL_FLAG        1
 201 #define RETR_FLAG       2
 202 #define NEW_FLAG        4
 203
 204 typedef struct {                                /*  Message information */
 205     int         number;                         /*  Message number relative to
 206                                                     the beginning of list */
 207     long        length;                         /*  Length of message in
 208                                                     bytes */
 209     int         lines;                          /*  Number of (null-terminated)                                                     lines in the message */
 210     long        offset;                         /*  Offset from beginning of
 211                                                     file */
 212     unsigned    flags;
 213
 214 #if defined(UIDL) || defined(XOVER)
 215     char        *msg_id;                        /*  The POP UIDL uniqueifier */
 216 #endif
 217 #ifdef XOVER
 218     char        *subject;
 219     char        *from;
 220     char        *date;
 221 #endif
 222     char        *name;
 223 } MsgInfoList;
 224
 225 #define IS_MAILDIR(P) ((P)->temp_drop[0] == '\0')
 226
 227 typedef struct  {                               /*  POP parameter block */
 228     int                 debug;                  /*  Debugging requested */
 229     char            *   myname;                 /*  The name of this POP
 230                                                     daemon program */
 231     char                myhost[MaxHostNameLen]; /*  The name of our host
 232                                                     computer */
 233     char                client[MaxHostNameLen]; /*  Canonical name of client
 234                                                     computer */
 235     char                ipaddr[MaxHostNameLen]; /*  Dotted-notation format of
 236                                                     client IP address */
 237     unsigned short      ipport;                 /*  Client port for privileged
 238                                                     operations */
 239     char                user[MAXUSERNAMELEN];   /*  Name of the POP user */
 240     state               CurrentState;           /*  The current POP operational                                                     state */
 241     MsgInfoList     *   mlp;                    /*  Message information list */
 242     int                 msg_count;              /*  Number of messages in
 243                                                     the maildrop */
 244     int                 msgs_deleted;           /*  Number of messages flagged
 245                                                     for deletion */
 246     int                 last_msg;               /*  Last message touched by
 247                                                     the user */
 248     long                bytes_deleted;          /*  Number of maildrop bytes
 249                                                     flagged for deletion */
 250     char                drop_name[MAXPATHLEN];  /*  The name of the user's
 251                                                     maildrop */
 252     char                temp_drop[MAXPATHLEN];  /*  The name of the user's
 253                                                     temporary maildrop */
 254     long                drop_size;              /*  Size of the maildrop in
 255                                                     bytes */
 256     FILE            *   drop;                   /*  (Temporary) mail drop */
 257     FILE            *   input;                  /*  Input TCP/IP communication
 258                                                     stream */
 259     FILE            *   output;                 /*  Output TCP/IP communication                                                     stream */
 260     FILE            *   trace;                  /*  Debugging trace file */
 261     char            *   pop_parm[MAXPARMCOUNT]; /*  Parse POP parameter list */
 262     int                 parm_count;             /*  Number of parameters in
 263                                                     parsed list */
 264     int                 kerberosp;              /*  Using KPOP? */
 265 #ifdef KRB4
 266     AUTH_DAT            kdata;
 267 #endif
 268 #ifdef KRB5
 269     krb5_context        context;
 270     krb5_principal      principal;              /*  principal auth as */
 271     krb5_log_facility*  logf;
 272 #endif
 273     int                 version;                /*  4 or 5? */
 274     int                 auth_level;             /*  Dont allow cleartext */
 275 #ifdef OTP
 276     OtpContext          otp_ctx;                /*  OTP context */
 277 #endif
 278     unsigned int        flags;
 279 #define POP_FLAG_CAPA   1
 280 } POP;
 281
 282 typedef struct {                                /*  State information for
 283                                                     each POP command */
 284     state       ValidCurrentState;              /*  The operating state of
 285                                                     the command */
 286     char   *    command;                        /*  The POP command */
 287     int         min_parms;                      /*  Minimum number of parms
 288                                                     for the command */
 289     int         max_parms;                      /*  Maximum number of parms
 290                                                     for the command */
 291     int         (*function) ();                 /*  The function that process
 292                                                     the command */
 293     state       result[2];                      /*  The resulting state after
 294                                                     command processing */
 295 #define success_state   result[0]               /*  State when a command
 296                                                     succeeds */
 297 } state_table;
 298
 299 typedef struct {                                /*  Table of extensions */
 300     char   *    subcommand;                     /*  The POP XTND subcommand */
 301     int         min_parms;                      /*  Minimum number of parms for
 302                                                     the subcommand */
 303     int         max_parms;                      /*  Maximum number of parms for
 304                                                     the subcommand */
 305     int         (*function) ();                 /*  The function that processes
 306                                                     the subcommand */
 307 } xtnd_table;
 308
 309 int pop_dele(POP *p);
 310 int pop_dropcopy(POP *p, struct passwd *pwp);
 311 int pop_dropinfo(POP *p);
 312 int pop_init(POP *p,int argcount,char **argmessage);
 313 int pop_last(POP *p);
 314 int pop_list(POP *p);
 315 int pop_parse(POP *p, char *buf);
 316 int pop_pass(POP *p);
 317 int pop_quit(POP *p);
 318 int pop_rset(POP *p);
 319 int pop_send(POP *p);
 320 int pop_stat(POP *p);
 321 int pop_updt(POP *p);
 322 int pop_user(POP *p);
 323 #ifdef UIDL
 324 int pop_uidl(POP *p);
 325 #endif
 326 #ifdef XOVER
 327 int pop_xover(POP *p);
 328 #endif
 329 #ifdef XDELE
 330 int pop_xdele(POP *p);
 331 #endif
 332 int pop_help(POP *p);
 333 state_table *pop_get_command(POP *p, char *mp);
 334 void pop_lower(char *buf);
 335 #ifdef SASL
 336 int pop_auth (POP *p);
 337 void pop_capa_sasl(POP *p);
 338 #endif
 339
 340 int pop_log(POP *p, int stat, char *format, ...)
 341 #ifdef __GNUC__
 342 __attribute__ ((format (printf, 3, 4)))
 343 #endif
 344 ;
 345
 346 int pop_msg(POP *p, int stat, char *format, ...)
 347 #ifdef __GNUC__
 348 __attribute__ ((format (printf, 3, 4)))
 349 #endif
 350 ;
 351
 352 int pop_maildir_info (POP*);
 353 int pop_maildir_open (POP*, MsgInfoList*);
 354 int pop_maildir_update (POP*);
 355
 356 int changeuser(POP*, struct passwd*);
 357 void parse_header(MsgInfoList*, char*);
 358 int add_missing_headers(POP*, MsgInfoList*);
 359 int login_user(POP *p);