mdw@git.distorted.org.uk Git - mLib/blob - ident.h

   1 /* -*-c-*-
   2  *
   3  * $Id: ident.h,v 1.3 2004/04/08 01:36:11 mdw Exp $
   4  *
   5  * Nonblocking RFC931 client
   6  *
   7  * (c) 1999 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the mLib utilities library.
  13  *
  14  * mLib is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * mLib is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with mLib; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 #ifndef MLIB_IDENT_H
  31 #define MLIB_IDENT_H
  32
  33 #ifdef __cplusplus
  34   extern "C" {
  35 #endif
  36
  37 /*----- Header files ------------------------------------------------------*/
  38
  39 #include <sys/types.h>
  40 #include <sys/socket.h>
  41 #include <netinet/in.h>
  42 #include <arpa/inet.h>
  43
  44 #ifndef MLIB_CONN_H
  45 #  include "conn.h"
  46 #endif
  47
  48 #ifndef MLIB_SEL_H
  49 #  include "sel.h"
  50 #endif
  51
  52 #ifndef MLIB_SELBUF_H
  53 #  include "selbuf.h"
  54 #endif
  55
  56 /*----- Data structures ---------------------------------------------------*/
  57
  58 /* --- Parsed response from ident server --- */
  59
  60 typedef struct ident_reply {
  61   unsigned short sport, dport;          /* Source and destination ports */
  62   unsigned type;                        /* Type of reply from server */
  63   union {
  64     struct {
  65       char *os;                         /* Operating system name */
  66       char *user;                       /* User name */
  67     } userid;
  68     char *error;                        /* Error message from server */
  69   } u;
  70 } ident_reply;
  71
  72 /* --- Response type codes --- */
  73
  74 enum {
  75   IDENT_USERID,
  76   IDENT_ERROR,
  77   IDENT_BAD
  78 };
  79
  80 /* --- Request structure --- */
  81
  82 typedef struct ident_request {
  83   struct sockaddr_in local, remote;
  84   unsigned state;
  85   void (*func)(ident_reply */*i*/, void */*p*/);
  86   void *p;
  87   sel_state *s;
  88   conn c;
  89   selbuf b;
  90 } ident_request;
  91
  92 enum {
  93   IDENT_CONN,
  94   IDENT_READ,
  95   IDENT_DONE
  96 };
  97
  98 /*----- Functions provided ------------------------------------------------*/
  99
 100 /* --- @ident_abort@ --- *
 101  *
 102  * Arguments:   @ident_request *rq@ = pointer to request block
 103  *
 104  * Returns:     ---
 105  *
 106  * Use:         Cancels an ident request in progress.
 107  */
 108
 109 extern void ident_abort(ident_request */*rq*/);
 110
 111 /* --- @ident@ --- *
 112  *
 113  * Arguments:   @ident_request *rq@ = pointer to request block
 114  *              @sel_state *s@ = I/O multiplexor
 115  *              @const struct sockaddr_in *local, *remote@ = addresses
 116  *              @void (*func)(ident_reply *i, void *p)@ = handler function
 117  *              @void *p@ = argument for handler
 118  *
 119  * Returns:     ---
 120  *
 121  * Use:         Initializes an ident request.
 122  */
 123
 124 extern void ident(ident_request */*rq*/, sel_state */*s*/,
 125                   const struct sockaddr_in */*local*/,
 126                   const struct sockaddr_in */*remote*/,
 127                   void (*/*func*/)(ident_reply */*i*/, void */*p*/),
 128                   void */*p*/);
 129
 130 /* --- @ident_socket@ --- *
 131  *
 132  * Arguments:   @ident_request *rq@ = pointer to request block
 133  *              @sel_state *s@ = I/O multiplexor
 134  *              @int sk@ = connected socket file descriptor
 135  *              @void (*func)(ident_reply *i, void *p)@ = handler function
 136  *              @void *p@ = argument for handler
 137  *
 138  * Returns:     ---
 139  *
 140  * Use:         An alternative interface to @ident@.  Initializes an ident
 141  *              request from a connected socket, rather than from an explicit
 142  *              address.  This will call @getsockname@ and @getpeername@ to
 143  *              find out what the socket is actually connected to, which adds
 144  *              convenience but wastes time.
 145  */
 146
 147 extern void ident_socket(ident_request */*rq*/, sel_state */*s*/, int /*sk*/,
 148                          void (*/*func*/)(ident_reply */*i*/, void */*p*/),
 149                          void */*p*/);
 150
 151 /*----- That's all, folks -------------------------------------------------*/
 152
 153 #ifdef __cplusplus
 154   }
 155 #endif
 156
 157 #endif