348 lines
11 KiB
C
348 lines
11 KiB
C
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/*
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* Copyright (c) 1989 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*
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* static char copyright[] = "Copyright (c) 1990 Regents of the University of California.\nAll rights reserved.\n";
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* static char SccsId[] = "@(#)@(#)popper.h 2.2 2.2 4/2/91";
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*
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*/
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/* $Id: popper.h,v 1.49 1999/08/12 11:37:55 joda Exp $ */
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/*
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* Header file for the POP programs
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#define UIDL
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#define XOVER
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#define XDELE
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#define DEBUG
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#define RETURN_PATH_HANDLING
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#endif
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/* Common include files */
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <ctype.h>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_IO_H
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#include <io.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#ifdef TIME_WITH_SYS_TIME
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#include <sys/time.h>
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#include <time.h>
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#elif defined(HAVE_SYS_TIME_H)
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#include <sys/time.h>
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#else
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#include <time.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETINET_IN6_H
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#include <netinet/in6.h>
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#endif
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#ifdef HAVE_NETINET6_IN6_H
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#include <netinet6/in6.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_SYSLOG_H
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#include <syslog.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#include "version.h"
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#ifdef SOCKS
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#include <socks.h>
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#endif
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#include <err.h>
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#include <roken.h>
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#include <getarg.h>
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#ifdef KRB4
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#include <krb.h>
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#include <prot.h>
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#endif
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#ifdef KRB5
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#include <krb5.h>
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#endif
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#define MAXUSERNAMELEN 65
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#define MAXDROPLEN 64
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#define MAXLINELEN 1024
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#define MAXMSGLINELEN 1024
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#define MAXCMDLEN 4
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#define MAXPARMCOUNT 10
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#define MAXPARMLEN 10
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#define ALLOC_MSGS 20
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#define MAIL_COMMAND "/usr/lib/sendmail"
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#define POP_FACILITY LOG_LOCAL0
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#define POP_PRIORITY LOG_NOTICE
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#define POP_DEBUG LOG_DEBUG
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#define POP_INFO LOG_INFO
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#define POP_LOGOPTS 0
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#ifdef HAVE_PATHS_H
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#include <paths.h>
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#endif
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#ifdef HAVE_MAILLOCK_H
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#include <maillock.h>
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#endif
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#ifdef OTP
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#include <otp.h>
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#endif
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#if defined(KRB4_MAILDIR)
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#define POP_MAILDIR KRB4_MAILDIR
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#elif defined(_PATH_MAILDIR)
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#define POP_MAILDIR _PATH_MAILDIR
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#elif defined(MAILDIR)
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#define POP_MAILDIR MAILDIR
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#else
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#define POP_MAILDIR "/usr/spool/mail"
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#endif
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#define POP_DROP POP_MAILDIR "/.%s.pop"
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/* POP_TMPSIZE needs to be big enough to hold the string
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* defined by POP_TMPDROP. POP_DROP and POP_TMPDROP
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* must be in the same filesystem.
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*/
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#define POP_TMPDROP POP_MAILDIR "/tmpXXXXXX"
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#define POP_TMPSIZE 256
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#define POP_TMPXMIT "/tmp/xmitXXXXXX"
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#define POP_OK "+OK"
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#define POP_ERR "-ERR"
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#define POP_SUCCESS 1
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#define POP_FAILURE 0
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#define POP_TERMINATE '.'
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#define POP_TIMEOUT 120 /* timeout connection after this many secs */
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extern int pop_timeout;
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extern int hangup;
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#define AUTH_NONE 0
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#define AUTH_OTP 1
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#define pop_command pop_parm[0] /* POP command is first token */
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#define pop_subcommand pop_parm[1] /* POP XTND subcommand is the
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second token */
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typedef enum { /* POP processing states */
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auth1, /* Authorization: waiting for
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USER command */
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auth2, /* Authorization: waiting for
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PASS command */
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trans, /* Transaction */
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update, /* Update: session ended,
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process maildrop changes */
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halt, /* (Halt): stop processing
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and exit */
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error /* (Error): something really
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bad happened */
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} state;
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#define DEL_FLAG 1
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#define RETR_FLAG 2
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#define NEW_FLAG 4
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typedef struct { /* Message information */
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int number; /* Message number relative to
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the beginning of list */
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long length; /* Length of message in
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bytes */
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int lines; /* Number of (null-terminated) lines in the message */
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long offset; /* Offset from beginning of
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file */
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unsigned flags;
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#if defined(UIDL) || defined(XOVER)
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char *msg_id; /* The POP UIDL uniqueifier */
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#endif
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#ifdef XOVER
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char *subject;
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char *from;
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char *date;
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#endif
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char *name;
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} MsgInfoList;
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#define IS_MAILDIR(P) ((P)->temp_drop[0] == '\0')
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typedef struct { /* POP parameter block */
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int debug; /* Debugging requested */
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char * myname; /* The name of this POP
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daemon program */
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char myhost[MaxHostNameLen]; /* The name of our host
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computer */
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char client[MaxHostNameLen]; /* Canonical name of client
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computer */
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char ipaddr[MaxHostNameLen]; /* Dotted-notation format of
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client IP address */
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unsigned short ipport; /* Client port for privileged
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operations */
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char user[MAXUSERNAMELEN]; /* Name of the POP user */
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state CurrentState; /* The current POP operational state */
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MsgInfoList * mlp; /* Message information list */
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int msg_count; /* Number of messages in
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the maildrop */
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int msgs_deleted; /* Number of messages flagged
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for deletion */
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int last_msg; /* Last message touched by
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the user */
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long bytes_deleted; /* Number of maildrop bytes
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flagged for deletion */
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char drop_name[MAXDROPLEN]; /* The name of the user's
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maildrop */
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char temp_drop[MAXDROPLEN]; /* The name of the user's
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temporary maildrop */
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long drop_size; /* Size of the maildrop in
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bytes */
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FILE * drop; /* (Temporary) mail drop */
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FILE * input; /* Input TCP/IP communication
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stream */
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FILE * output; /* Output TCP/IP communication stream */
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FILE * trace; /* Debugging trace file */
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char * pop_parm[MAXPARMCOUNT]; /* Parse POP parameter list */
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int parm_count; /* Number of parameters in
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parsed list */
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int kerberosp; /* Using KPOP? */
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#ifdef KRB4
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AUTH_DAT kdata;
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#endif
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#ifdef KRB5
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krb5_context context;
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krb5_principal principal; /* principal auth as */
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krb5_log_facility* logf;
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#endif
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int version; /* 4 or 5? */
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int auth_level; /* Dont allow cleartext */
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#ifdef OTP
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OtpContext otp_ctx; /* OTP context */
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#endif
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} POP;
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typedef struct { /* State information for
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each POP command */
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state ValidCurrentState; /* The operating state of
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the command */
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char * command; /* The POP command */
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int min_parms; /* Minimum number of parms
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for the command */
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int max_parms; /* Maximum number of parms
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for the command */
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int (*function) (); /* The function that process
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the command */
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state result[2]; /* The resulting state after
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command processing */
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#define success_state result[0] /* State when a command
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succeeds */
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} state_table;
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typedef struct { /* Table of extensions */
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char * subcommand; /* The POP XTND subcommand */
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int min_parms; /* Minimum number of parms for
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the subcommand */
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int max_parms; /* Maximum number of parms for
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the subcommand */
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int (*function) (); /* The function that processes
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the subcommand */
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} xtnd_table;
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int pop_dele(POP *p);
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int pop_dropcopy(POP *p, struct passwd *pwp);
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int pop_dropinfo(POP *p);
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int pop_init(POP *p,int argcount,char **argmessage);
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int pop_last(POP *p);
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int pop_list(POP *p);
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int pop_parse(POP *p, char *buf);
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int pop_pass(POP *p);
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int pop_quit(POP *p);
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int pop_rset(POP *p);
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int pop_send(POP *p);
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int pop_stat(POP *p);
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int pop_updt(POP *p);
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int pop_user(POP *p);
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#ifdef UIDL
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int pop_uidl(POP *p);
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#endif
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#ifdef XOVER
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int pop_xover(POP *p);
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#endif
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#ifdef XDELE
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int pop_xdele(POP *p);
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#endif
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int pop_help(POP *p);
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state_table *pop_get_command(POP *p, char *mp);
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void pop_lower(char *buf);
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int pop_log(POP *p, int stat, char *format, ...)
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#ifdef __GNUC__
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__attribute__ ((format (printf, 3, 4)))
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#endif
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;
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int pop_msg(POP *p, int stat, char *format, ...)
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#ifdef __GNUC__
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__attribute__ ((format (printf, 3, 4)))
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#endif
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;
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int pop_maildir_info (POP*);
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int pop_maildir_open (POP*, MsgInfoList*);
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int pop_maildir_update (POP*);
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int changeuser(POP*, struct passwd*);
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void parse_header(MsgInfoList*, char*);
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int add_missing_headers(POP*, MsgInfoList*);
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