newsd/Server.H

//
// "$Id: Server.H 153 2009-04-13 01:29:07Z mike $"
//
// Server class definitions for newsd.
//
// Copyright 2003-2009 Michael Sweet
// Copyright 2002 Greg Ercolano
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public Licensse as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//

#ifndef _Server_H_
#  define _Server_H_

#  include "everything.H"
#  include "Group.H"
#  include "Article.H"


enum NNTPStatus				//// NNTP status codes
{
  NNTP_HELP = 100,			// Help text follows (multi-line)
  NNTP_CAPABILITIES = 101,		// Capability list follows (multi-line)
  NNTP_DATE = 111,			// Server date and time
  NNTP_POSTING_ALLOWED = 200,		// Posting allowed (initial, MODE READER)
  NNTP_POSTING_NOT_ALLOWED = 201,	// Posting not allowed (initial, MODE READER)
  NNTP_QUIT = 205,			// Connection closing
  NNTP_GROUP = 211,			// Group successfully selected
  NNTP_LIST = 215,			// Information follows (multi-line)
  NNTP_ARTICLE = 220,			// Article data follows (multi-line)
  NNTP_HEAD = 221,			// Article headers follow (multi-line)
  NNTP_BODY = 222,			// Article body follows (multi-line)
  NNTP_ARTICLE_FOUND = 223,		// Article found (LAST, NEXT, STAT)
  NNTP_OVER = 224,			// Overview information follows (multi-line)
  NNTP_HDR = 225,			// Headers follow (multi-line)
  NNTP_NEWNEWS = 230,			// List of new articles follows (multi-line)
  NNTP_NEWGROUPS = 231,			// List of new newsgroups follows (multi-line)
  NNTP_IHAVE = 235,			// Article transferred OK (second stage)
  NNTP_POST = 240,			// Article received OK (second stage)
  NNTP_AUTHINFO_ACCEPTED = 281,		// Authentication accepted
  NNTP_AUTHINFO_ACCEPTED_INFO = 283,	// Authentication accepted (with success data)
  NNTP_IHAVE_CONTINUE = 335,		// Send article to be transferred
  NNTP_POST_CONTINUE = 340,		// Send article to be posted
  NNTP_AUTHINFO_SIMPLE = 350,		// Continue with authorization sequence
  NNTP_AUTHINFO_PASSWORD = 381,		// Password required
  NNTP_STARTTLS = 382,			// Continue with TLS negotiation
  NNTP_UNAVAILABLE = 400,		// Service not available or no longer available
  NNTP_WRONG_MODE = 401,		// The server is in the wrong mode
  NNTP_INTERNAL_ERROR = 403,		// Internal fault or problem preventing action being taken
  NNTP_GROUP_NOT_FOUND = 411,		// No such newsgroup (GROUP, LISTGROUP)
  NNTP_GROUP_NOT_SELECTED = 412,	// No newsgroup selected (ARTICLE, BODY, GROUP, HDR, HEAD, LAST, LISTGROUP, NEXT, OVER, STAT)
  NNTP_NO_CURRENT_ARTICLE = 420,	// Current article number is invalid (ARTICLE, BODY, HDR, HEAD, LAST, NEXT, OVER, STAT)
  NNTP_NO_NEXT_ARTICLE = 421,		// No next article in this group (NEXT)
  NNTP_NO_LAST_ARTICLE = 422,		// No previous article in this group (LAST)
  NNTP_BAD_ARTICLE_NUMBER = 423,	// No article with that number or in that range (ARTICLE, BODY, HDR, HEAD, OVER, STAT)
  NNTP_BAD_MESSAGE_ID = 430,		// No article with that message-id (ARTICLE, BODY, HDR, HEAD, OVER, STAT)
  NNTP_IHAVE_NOT_WANTED = 435,		// Article not wanted
  NNTP_IHAVE_NOT_POSSIBLE = 436,	// Transfer not possible; try again later
  NNTP_IHAVE_REJECTED = 437,		// Transfer rejected; do not retry
  NNTP_POST_NOT_ALLOWED = 440,		// Posting not allowed
  NNTP_POST_FAILED = 441,		// Posting failed
  NNTP_AUTHINFO_REQUIRED = 480,		// Authentication required
  NNTP_AUTHINFO_REJECTED = 481,		// Authentication rejected
  NNTP_AUTHINFO_ERROR = 482,		// Authentication error
  NTTP_PRIVACY = 483,			// Command unavailable until suitable privacy has been arranged
  NNTP_UNKNOWN_COMMAND = 500,		// Unknown command
  NNTP_SYNTAX_ERROR = 501,		// Syntax error in command
  NNTP_NO_PERMISSION = 502,		// No permission (initial, AUTHINFO, MODE READER)
  NNTP_NOT_SUPPORTED = 503,		// Feature not supported
  NNTP_BASE64_ERROR = 504,		// Error in base64-encoding [RFC4648] of an argument
  NNTP_STARTTLS_ERROR = 580		// Cannot initiate TLS negotiation
};

class Listener				//// Listener 
{
  // Instance data
  int			sock;		// Listener socket

  // Class global data
  static int		alloc_polldata,	// Allocated pollfd elements
			num_polldata;	// Active pollfd elements
  static struct pollfd	*polldata;	// pollfd elements

  public:

  Listener(const char *hostport);
  ~Listener();

  static int		StartServers();
};

class Server
{
    // Server-specific data...
    int sock,		// listener socket (accept())
        msgsock;	// transaction socket (read/write)
    char *buf;		// line buffer (internal)
    struct sockaddr_in sin;

    Group group;	// current group
    Article article;	// current article
    string errmsg;

public:

    Server()
    {
        sock = msgsock = -1;
	buf = (char*)malloc(LINE_LEN);
    }

    ~Server()
    {
        if ( msgsock != -1 )
	    { close(msgsock); msgsock = -1; }
        if ( sock != -1 )
	    { close(sock); sock = -1; }
	if ( buf )
	    { free(buf); buf = 0; }
    }

    const char *Errmsg() { return(errmsg.c_str()); }
    int MsgSock() { return(msgsock); }
    int Sock() { return(sock); }
    const char *GetRemoteIPStr()
	{ return(inet_ntoa(sin.sin_addr)); }

    int Send(const char *msg);
    int IsAllowed(int op);
    int ValidGroup(const char *groupname);
    int NewGroup(const char *the_group);

    // TCP CONNECTIONS
    int Listen();
    int Accept();
    int CommandLoop(const char *overview[]);
};

#endif // !_Server_H_

//
// End of "$Id: Server.H 153 2009-04-13 01:29:07Z mike $".
//