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

   1 /* -*-c-*-
   2  *
   3  * $Id: ident.h,v 1.1 1999/10/04 21:41:58 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 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: ident.h,v $
  33  * Revision 1.1  1999/10/04 21:41:58  mdw
  34  * Added ident client from `fw'.
  35  *
  36  */
  37
  38 #ifndef IDENT_H
  39 #define IDENT_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Header files ------------------------------------------------------*/
  46
  47 #include <sys/types.h>
  48 #include <sys/socket.h>
  49 #include <netinet/in.h>
  50 #include <arpa/inet.h>
  51
  52 #ifndef CONN_H
  53 #  include "conn.h"
  54 #endif
  55
  56 #ifndef SEL_H
  57 #  include "sel.h"
  58 #endif
  59
  60 #ifndef SELBUF_H
  61 #  include "selbuf.h"
  62 #endif
  63
  64 /*----- Data structures ---------------------------------------------------*/
  65
  66 /* --- Parsed response from ident server --- */
  67
  68 typedef struct ident_reply {
  69   unsigned short sport, dport;          /* Source and destination ports */
  70   unsigned type;                        /* Type of reply from server */
  71   union {
  72     struct {
  73       char *os;                         /* Operating system name */
  74       char *user;                       /* User name */
  75     } userid;
  76     char *error;                        /* Error message from server */
  77   } u;
  78 } ident_reply;
  79
  80 /* --- Response type codes --- */
  81
  82 enum {
  83   IDENT_USERID,
  84   IDENT_ERROR,
  85   IDENT_BAD
  86 };
  87
  88 /* --- Request structure --- */
  89
  90 typedef struct ident_request {
  91   struct sockaddr_in local, remote;
  92   unsigned state;
  93   void (*func)(ident_reply */*i*/, void */*p*/);
  94   void *p;
  95   sel_state *s;
  96   conn c;
  97   selbuf b;
  98 } ident_request;
  99
 100 enum {
 101   IDENT_CONN,
 102   IDENT_READ,
 103   IDENT_DONE
 104 };
 105
 106 /*----- Functions provided ------------------------------------------------*/
 107
 108 /* --- @ident_abort@ --- *
 109  *
 110  * Arguments:   @ident_request *rq@ = pointer to request block
 111  *
 112  * Returns:     ---
 113  *
 114  * Use:         Cancels an ident request in progress.
 115  */
 116
 117 extern void ident_abort(ident_request */*rq*/);
 118
 119 /* --- @ident@ --- *
 120  *
 121  * Arguments:   @ident_request *rq@ = pointer to request block
 122  *              @sel_state *s@ = I/O multiplexor
 123  *              @const struct sockaddr_in *local, *remote@ = addresses
 124  *              @void (*func)(ident_reply *i, void *p)@ = handler function
 125  *              @void *p@ = argument for handler
 126  *
 127  * Returns:     ---
 128  *
 129  * Use:         Initializes an ident request.
 130  */
 131
 132 extern void ident(ident_request */*rq*/, sel_state */*s*/,
 133                   const struct sockaddr_in */*local*/,
 134                   const struct sockaddr_in */*remote*/,
 135                   void (*/*func*/)(ident_reply */*i*/, void */*p*/),
 136                   void */*p*/);
 137
 138 /* --- @ident_socket@ --- *
 139  *
 140  * Arguments:   @ident_request *rq@ = pointer to request block
 141  *              @sel_state *s@ = I/O multiplexor
 142  *              @int sk@ = connected socket file descriptor
 143  *              @void (*func)(ident_reply *i, void *p)@ = handler function
 144  *              @void *p@ = argument for handler
 145  *
 146  * Returns:     ---
 147  *
 148  * Use:         An alternative interface to @ident@.  Initializes an ident
 149  *              request from a connected socket, rather than from an explicit
 150  *              address.  This will call @getsockname@ and @getpeername@ to
 151  *              find out what the socket is actually connected to, which adds
 152  *              convenience but wastes time.
 153  */
 154
 155 extern void ident_socket(ident_request */*rq*/, sel_state */*s*/, int /*sk*/,
 156                          void (*/*func*/)(ident_reply */*i*/, void */*p*/),
 157                          void */*p*/);
 158
 159 /*----- That's all, folks -------------------------------------------------*/
 160
 161 #ifdef __cplusplus
 162   }
 163 #endif
 164
 165 #endif