client.h

   1 /*
   2  * Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file client.h Common client functions and exported symbols from client_common.c. */
   8
   9 /** The different states of a connection from the view of the client. */
  10 enum {
  11         /** TCP connection is established. */
  12         CL_CONNECTED,
  13         /** Server sends the welcome message. */
  14         CL_RECEIVED_WELCOME,
  15         /** Client sends the authentication request. */
  16         CL_SENT_AUTH,
  17         /** Server sends encrypted challenge. */
  18         CL_RECEIVED_CHALLENGE,
  19         /** Client solves the challenge and sends the result. */
  20         CL_SENT_CH_RESPONSE,
  21         /** Server accepts this authentication. */
  22         CL_RECEIVED_PROCEED,
  23         /** Command is executing. */
  24         CL_EXECUTING,
  25         /** Server is expecting data (addblob commands only). */
  26         CL_SENDING,
  27 };
  28
  29 /** Data specific to a client task. */
  30 struct client_task {
  31         /** The state of the connection. */
  32         int status;
  33         /** The file descriptor and the session keys. */
  34         struct stream_cipher_context scc;
  35         /** The sideband contexts for receiving/sending. */
  36         struct sb_context *sbc[2];
  37         /** The buffer tree nodes for receiving/sending. */
  38         struct btr_node *btrn[2];
  39         /** The hash value of the decrypted challenge. */
  40         unsigned char *challenge_hash;
  41         /** The configuration (including the command). */
  42         struct client_args_info conf;
  43         /** The config file for client options. */
  44         char *config_file;
  45         /** The RSA private key. */
  46         char *key_file;
  47         /** Paraslash user name. */
  48         char *user;
  49         /** The client task structure. */
  50         struct task *task;
  51         /** List of features supported by the server. */
  52         char **features;
  53 };
  54
  55 void client_close(struct client_task *ct);
  56 int client_parse_config(int argc, char *argv[], struct client_task **ct_ptr,
  57                 int *loglevel);
  58 int client_connect(struct client_task *ct, struct sched *s,
  59                 struct btr_node *parent, struct btr_node *child);
  60 int client_open(int argc, char *argv[], struct client_task **ct_ptr,
  61                 int *loglevel, struct btr_node *parent, struct btr_node *child,
  62                 struct sched *sched);