lib/libtacplus/taclib_private.h

   1 /*-
   2  * Copyright (c) 1998, 2001, Juniper Networks, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/lib/libtacplus/taclib_private.h,v 1.1.1.1.6.1 2002/10/09 08:50:42 pst Exp $
  27  *      $DragonFly: src/lib/libtacplus/taclib_private.h,v 1.2 2003/06/17 04:26:51 dillon Exp $
  28  */
  29
  30 #ifndef TACLIB_PRIVATE_H
  31 #define TACLIB_PRIVATE_H
  32
  33 #include "taclib.h"
  34
  35 /* Defaults */
  36 #define PATH_TACPLUS_CONF       "/etc/tacplus.conf"
  37 #define TACPLUS_PORT            49
  38 #define TIMEOUT                 3       /* In seconds */
  39
  40 /* Limits */
  41 #define BODYSIZE        8150            /* Maximum message body size */
  42 #define ERRSIZE         128             /* Maximum error message length */
  43 #define MAXCONFLINE     1024            /* Maximum config file line length */
  44 #define MAXSERVERS      10              /* Maximum number of servers to try */
  45 #define MAXAVPAIRS      255             /* Maximum number of AV pairs */
  46
  47 /* Protocol constants. */
  48 #define HDRSIZE         12              /* Size of message header */
  49
  50 /* Protocol version number */
  51 #define TAC_VER_MAJOR           0xc             /* Major version number */
  52
  53 /* Protocol packet types */
  54 #define TAC_AUTHEN              0x01            /* Authentication */
  55 #define TAC_AUTHOR              0x02            /* Authorization */
  56 #define TAC_ACCT                0x03            /* Accouting */
  57
  58 /* Protocol header flags */
  59 #define TAC_UNENCRYPTED         0x01
  60 #define TAC_SINGLE_CONNECT      0x04
  61
  62 struct tac_server {
  63         struct sockaddr_in addr;        /* Address of server */
  64         char            *secret;        /* Shared secret */
  65         int              timeout;       /* Timeout in seconds */
  66         int              flags;
  67 };
  68
  69 /*
  70  * An optional string of bytes specified by the client for inclusion in
  71  * a request.  The data is always a dynamically allocated copy that
  72  * belongs to the library.  It is copied into the request packet just
  73  * before sending the request.
  74  */
  75 struct clnt_str {
  76         void            *data;
  77         size_t           len;
  78 };
  79
  80 /*
  81  * An optional string of bytes from a server response.  The data resides
  82  * in the response packet itself, and must not be freed.
  83  */
  84 struct srvr_str {
  85         const void      *data;
  86         size_t           len;
  87 };
  88
  89 struct tac_authen_start {
  90         u_int8_t        action;
  91         u_int8_t        priv_lvl;
  92         u_int8_t        authen_type;
  93         u_int8_t        service;
  94         u_int8_t        user_len;
  95         u_int8_t        port_len;
  96         u_int8_t        rem_addr_len;
  97         u_int8_t        data_len;
  98         unsigned char   rest[1];
  99 };
 100
 101 struct tac_authen_reply {
 102         u_int8_t        status;
 103         u_int8_t        flags;
 104         u_int16_t       msg_len;
 105         u_int16_t       data_len;
 106         unsigned char   rest[1];
 107 };
 108
 109 struct tac_authen_cont {
 110         u_int16_t       user_msg_len;
 111         u_int16_t       data_len;
 112         u_int8_t        flags;
 113         unsigned char   rest[1];
 114 };
 115
 116 struct tac_author_request {
 117         u_int8_t        authen_meth;
 118         u_int8_t        priv_lvl;
 119         u_int8_t        authen_type;
 120         u_int8_t        service;
 121         u_int8_t        user_len;
 122         u_int8_t        port_len;
 123         u_int8_t        rem_addr_len;
 124         u_int8_t        av_cnt;
 125         unsigned char   rest[1];
 126 };
 127
 128 struct tac_author_response {
 129         u_int8_t        status;
 130         u_int8_t        av_cnt;
 131         u_int16_t       msg_len;
 132         u_int16_t       data_len;
 133         unsigned char   rest[1];
 134 };
 135
 136 struct tac_msg {
 137         u_int8_t        version;
 138         u_int8_t        type;
 139         u_int8_t        seq_no;
 140         u_int8_t        flags;
 141         u_int8_t        session_id[4];
 142         u_int32_t       length;
 143         union {
 144                 struct tac_authen_start authen_start;
 145                 struct tac_authen_reply authen_reply;
 146                 struct tac_authen_cont authen_cont;
 147                 struct tac_author_request author_request;
 148                 struct tac_author_response author_response;
 149                 unsigned char body[BODYSIZE];
 150         } u;
 151 };
 152
 153 struct tac_handle {
 154         int              fd;            /* Socket file descriptor */
 155         struct tac_server servers[MAXSERVERS];  /* Servers to contact */
 156         int              num_servers;   /* Number of valid server entries */
 157         int              cur_server;    /* Server we are currently using */
 158         int              single_connect;        /* Use a single connection */
 159         int              last_seq_no;
 160         char             errmsg[ERRSIZE];       /* Most recent error message */
 161
 162         struct clnt_str  user;
 163         struct clnt_str  port;
 164         struct clnt_str  rem_addr;
 165         struct clnt_str  data;
 166         struct clnt_str  user_msg;
 167         struct clnt_str  avs[MAXAVPAIRS];
 168
 169         struct tac_msg   request;
 170         struct tac_msg   response;
 171
 172         int              srvr_pos;      /* Scan position in response body */
 173         struct srvr_str  srvr_msg;
 174         struct srvr_str  srvr_data;
 175         struct srvr_str  srvr_avs[MAXAVPAIRS];
 176 };
 177
 178 #endif