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/*
* Copyright (c) 1989 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* static char copyright[] = "Copyright (c) 1990 Regents of the University of California.\nAll rights reserved.\n";
* static char SccsId[] = "@(#)@(#)popper.h 2.2 2.2 4/2/91";
*
*/
/* $Id: popper.h,v 1.51 2002/07/04 13:56:12 joda Exp $ */
/*
* Header file for the POP programs
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#define UIDL
#define XOVER
#define XDELE
#define DEBUG
#define RETURN_PATH_HANDLING
#endif
/* Common include files */
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <setjmp.h>
#include <ctype.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#elif defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#else
#include <time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_NETINET6_IN6_H
#include <netinet6/in6.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#ifdef _AIX
struct sockaddr_dl; /* AIX fun */
struct ether_addr;
#endif
#include <arpa/inet.h>
#endif
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include "version.h"
#ifdef SOCKS
#include <socks.h>
#endif
#include <err.h>
#include <roken.h>
#include <getarg.h>
#ifdef KRB4
#include <krb.h>
#include <prot.h>
#endif
#ifdef KRB5
#include <krb5.h>
#endif
#define MAXUSERNAMELEN 65
#define MAXLINELEN 1024
#define MAXMSGLINELEN 1024
#define MAXCMDLEN 4
#define MAXPARMCOUNT 10
#define MAXPARMLEN 10
#define ALLOC_MSGS 20
#define MAIL_COMMAND "/usr/lib/sendmail"
#define POP_FACILITY LOG_LOCAL0
#define POP_PRIORITY LOG_NOTICE
#define POP_DEBUG LOG_DEBUG
#define POP_INFO LOG_INFO
#define POP_LOGOPTS 0
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef HAVE_MAILLOCK_H
#include <maillock.h>
#endif
#ifdef OTP
#include <otp.h>
#endif
#if defined(KRB4_MAILDIR)
#define POP_MAILDIR KRB4_MAILDIR
#elif defined(_PATH_MAILDIR)
#define POP_MAILDIR _PATH_MAILDIR
#elif defined(MAILDIR)
#define POP_MAILDIR MAILDIR
#else
#define POP_MAILDIR "/usr/spool/mail"
#endif
#define POP_DROP POP_MAILDIR "/.%s.pop"
/* POP_TMPSIZE needs to be big enough to hold the string
* defined by POP_TMPDROP. POP_DROP and POP_TMPDROP
* must be in the same filesystem.
*/
#define POP_TMPDROP POP_MAILDIR "/tmpXXXXXX"
#define POP_TMPSIZE 256
#define POP_TMPXMIT "/tmp/xmitXXXXXX"
#define POP_OK "+OK"
#define POP_ERR "-ERR"
#define POP_SUCCESS 1
#define POP_FAILURE 0
#define POP_TERMINATE '.'
#define POP_TIMEOUT 120 /* timeout connection after this many secs */
extern int pop_timeout;
extern int hangup;
#define AUTH_NONE 0
#define AUTH_OTP 1
#define pop_command pop_parm[0] /* POP command is first token */
#define pop_subcommand pop_parm[1] /* POP XTND subcommand is the
second token */
typedef enum { /* POP processing states */
auth1, /* Authorization: waiting for
USER command */
auth2, /* Authorization: waiting for
PASS command */
trans, /* Transaction */
update, /* Update: session ended,
process maildrop changes */
halt, /* (Halt): stop processing
and exit */
error /* (Error): something really
bad happened */
} state;
#define DEL_FLAG 1
#define RETR_FLAG 2
#define NEW_FLAG 4
typedef struct { /* Message information */
int number; /* Message number relative to
the beginning of list */
long length; /* Length of message in
bytes */
int lines; /* Number of (null-terminated) lines in the message */
long offset; /* Offset from beginning of
file */
unsigned flags;
#if defined(UIDL) || defined(XOVER)
char *msg_id; /* The POP UIDL uniqueifier */
#endif
#ifdef XOVER
char *subject;
char *from;
char *date;
#endif
char *name;
} MsgInfoList;
#define IS_MAILDIR(P) ((P)->temp_drop[0] == '\0')
typedef struct { /* POP parameter block */
int debug; /* Debugging requested */
char * myname; /* The name of this POP
daemon program */
char myhost[MaxHostNameLen]; /* The name of our host
computer */
char client[MaxHostNameLen]; /* Canonical name of client
computer */
char ipaddr[MaxHostNameLen]; /* Dotted-notation format of
client IP address */
unsigned short ipport; /* Client port for privileged
operations */
char user[MAXUSERNAMELEN]; /* Name of the POP user */
state CurrentState; /* The current POP operational state */
MsgInfoList * mlp; /* Message information list */
int msg_count; /* Number of messages in
the maildrop */
int msgs_deleted; /* Number of messages flagged
for deletion */
int last_msg; /* Last message touched by
the user */
long bytes_deleted; /* Number of maildrop bytes
flagged for deletion */
char drop_name[MAXPATHLEN]; /* The name of the user's
maildrop */
char temp_drop[MAXPATHLEN]; /* The name of the user's
temporary maildrop */
long drop_size; /* Size of the maildrop in
bytes */
FILE * drop; /* (Temporary) mail drop */
FILE * input; /* Input TCP/IP communication
stream */
FILE * output; /* Output TCP/IP communication stream */
FILE * trace; /* Debugging trace file */
char * pop_parm[MAXPARMCOUNT]; /* Parse POP parameter list */
int parm_count; /* Number of parameters in
parsed list */
int kerberosp; /* Using KPOP? */
#ifdef KRB4
AUTH_DAT kdata;
#endif
#ifdef KRB5
krb5_context context;
krb5_principal principal; /* principal auth as */
krb5_log_facility* logf;
#endif
int version; /* 4 or 5? */
int auth_level; /* Dont allow cleartext */
#ifdef OTP
OtpContext otp_ctx; /* OTP context */
#endif
unsigned int flags;
#define POP_FLAG_CAPA 1
} POP;
typedef struct { /* State information for
each POP command */
state ValidCurrentState; /* The operating state of
the command */
char * command; /* The POP command */
int min_parms; /* Minimum number of parms
for the command */
int max_parms; /* Maximum number of parms
for the command */
int (*function) (); /* The function that process
the command */
state result[2]; /* The resulting state after
command processing */
#define success_state result[0] /* State when a command
succeeds */
} state_table;
typedef struct { /* Table of extensions */
char * subcommand; /* The POP XTND subcommand */
int min_parms; /* Minimum number of parms for
the subcommand */
int max_parms; /* Maximum number of parms for
the subcommand */
int (*function) (); /* The function that processes
the subcommand */
} xtnd_table;
int pop_dele(POP *p);
int pop_dropcopy(POP *p, struct passwd *pwp);
int pop_dropinfo(POP *p);
int pop_init(POP *p,int argcount,char **argmessage);
int pop_last(POP *p);
int pop_list(POP *p);
int pop_parse(POP *p, char *buf);
int pop_pass(POP *p);
int pop_quit(POP *p);
int pop_rset(POP *p);
int pop_send(POP *p);
int pop_stat(POP *p);
int pop_updt(POP *p);
int pop_user(POP *p);
#ifdef UIDL
int pop_uidl(POP *p);
#endif
#ifdef XOVER
int pop_xover(POP *p);
#endif
#ifdef XDELE
int pop_xdele(POP *p);
#endif
int pop_help(POP *p);
state_table *pop_get_command(POP *p, char *mp);
void pop_lower(char *buf);
int pop_log(POP *p, int stat, char *format, ...)
#ifdef __GNUC__
__attribute__ ((format (printf, 3, 4)))
#endif
;
int pop_msg(POP *p, int stat, char *format, ...)
#ifdef __GNUC__
__attribute__ ((format (printf, 3, 4)))
#endif
;
int pop_maildir_info (POP*);
int pop_maildir_open (POP*, MsgInfoList*);
int pop_maildir_update (POP*);
int changeuser(POP*, struct passwd*);
void parse_header(MsgInfoList*, char*);
int add_missing_headers(POP*, MsgInfoList*);
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