client.h

   1 /* Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
   2
   3 /** \file client.h Common client functions and exported symbols from client_common.c. */
   4
   5 /** The different states of a connection from the view of the client. */
   6 enum {
   7         /** TCP connection is established. */
   8         CL_CONNECTED,
   9         /** Server sends the welcome message. */
  10         CL_RECEIVED_WELCOME,
  11         /** Client sends the authentication request. */
  12         CL_SENT_AUTH,
  13         /** Server sends encrypted challenge. */
  14         CL_RECEIVED_CHALLENGE,
  15         /** Client solves the challenge and sends the result. */
  16         CL_SENT_CH_RESPONSE,
  17         /** Server accepts this authentication. */
  18         CL_RECEIVED_PROCEED,
  19         /** Command is executing. */
  20         CL_EXECUTING,
  21         /** Server is expecting data (addblob commands only). */
  22         CL_SENDING,
  23 };
  24
  25 /** Data specific to a client task. */
  26 struct client_task {
  27         /** The state of the connection. */
  28         int status;
  29         /** The file descriptor and the session keys. */
  30         struct stream_cipher_context scc;
  31         /** The sideband contexts for receiving/sending. */
  32         struct sb_context *sbc[2];
  33         /** The buffer tree nodes for receiving/sending. */
  34         struct btr_node *btrn[2];
  35         /** The hash value of the decrypted challenge. */
  36         unsigned char *challenge_hash;
  37         /** The parsed command line (including the command). */
  38         struct lls_parse_result *lpr;
  39         /** The RSA private key. */
  40         char *key_file;
  41         /** Paraslash user name. */
  42         char *user;
  43         /** The client task structure. */
  44         struct task *task;
  45         /** List of features supported by the server. */
  46         char **features;
  47 };
  48
  49 #define CLIENT_CMD_PTR (lls_cmd(0, client_suite))
  50 #define CLIENT_OPT_RESULT(_name, _lpr) \
  51         (lls_opt_result(LSG_CLIENT_PARA_CLIENT_OPT_ ## _name, _lpr))
  52 #define CLIENT_OPT_GIVEN(_name, _lpr) \
  53         (lls_opt_given(CLIENT_OPT_RESULT(_name, _lpr)))
  54 #define CLIENT_OPT_UINT32_VAL(_name, _lpr) \
  55         (lls_uint32_val(0, CLIENT_OPT_RESULT(_name, _lpr)))
  56 #define CLIENT_OPT_STRING_VAL(_name, _lpr) \
  57         (lls_string_val(0, CLIENT_OPT_RESULT(_name, _lpr)))
  58
  59 void client_close(struct client_task *ct);
  60 int client_parse_config(int argc, char *argv[], struct client_task **ct_ptr,
  61                 int *loglevel);
  62 int client_connect(struct client_task *ct, struct sched *s,
  63                 struct btr_node *parent, struct btr_node *child);
  64 int client_open(int argc, char *argv[], struct client_task **ct_ptr,
  65                 int *loglevel, struct btr_node *parent, struct btr_node *child,
  66                 struct sched *sched);