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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  23  ***************************************************************************/
  24
  25 #ifndef OPENOCD_SERVER_SERVER_H
  26 #define OPENOCD_SERVER_SERVER_H
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <helper/log.h>
  33 #include <helper/replacements.h>
  34
  35 #ifdef HAVE_NETINET_IN_H
  36 #include <netinet/in.h>
  37 #endif
  38
  39 enum connection_type {
  40         CONNECTION_TCP,
  41         CONNECTION_PIPE,
  42         CONNECTION_STDINOUT
  43 };
  44
  45 #define CONNECTION_LIMIT_UNLIMITED              (-1)
  46
  47 struct connection {
  48         int fd;
  49         int fd_out;     /* When using pipes we're writing to a different fd */
  50         struct sockaddr_in sin;
  51         struct command_context *cmd_ctx;
  52         struct service *service;
  53         bool input_pending;
  54         void *priv;
  55         struct connection *next;
  56 };
  57
  58 struct service_driver {
  59         /** the name of the server */
  60         const char *name;
  61         /** optional minimal setup to accept a connection during keep-alive */
  62         int (*new_connection_during_keep_alive_handler)(struct connection *connection);
  63         /**
  64          * complete code to accept a new connection.
  65          * If 'new_connection_during_keep_alive_handler' above is present, this can be
  66          * either called alone during the server_loop, or after the function above.
  67          * Check the implementation in gdb_server.
  68          * */
  69         int (*new_connection_handler)(struct connection *connection);
  70         /** callback to handle incoming data */
  71         int (*input_handler)(struct connection *connection);
  72         /** callback to tear down the connection */
  73         int (*connection_closed_handler)(struct connection *connection);
  74         /** called periodically to send keep-alive messages on the connection */
  75         void (*keep_client_alive_handler)(struct connection *connection);
  76 };
  77
  78 struct service {
  79         char *name;
  80         enum connection_type type;
  81         char *port;
  82         unsigned short portnumber;
  83         int fd;
  84         struct sockaddr_in sin;
  85         int max_connections;
  86         struct connection *connections;
  87         int (*new_connection_during_keep_alive)(struct connection *connection);
  88         int (*new_connection)(struct connection *connection);
  89         int (*input)(struct connection *connection);
  90         int (*connection_closed)(struct connection *connection);
  91         void (*keep_client_alive)(struct connection *connection);
  92         void *priv;
  93         struct service *next;
  94 };
  95
  96 int add_service(const struct service_driver *driver, const char *port,
  97                 int max_connections, void *priv);
  98 int remove_service(const char *name, const char *port);
  99
 100 int server_host_os_entry(void);
 101 int server_host_os_close(void);
 102
 103 int server_preinit(void);
 104 int server_init(struct command_context *cmd_ctx);
 105 int server_quit(void);
 106 void server_free(void);
 107 void exit_on_signal(int sig);
 108
 109 void server_keep_clients_alive(void);
 110
 111 int server_loop(struct command_context *command_context);
 112
 113 int server_register_commands(struct command_context *context);
 114
 115 int connection_write(struct connection *connection, const void *data, int len);
 116 int connection_read(struct connection *connection, void *data, int len);
 117
 118 /**
 119  * Defines an extended command handler function declaration to enable
 120  * access to (and manipulation of) the server port number.
 121  * Call server_port like a normal COMMAND_HANDLER with an extra @a out parameter
 122  * to receive the specified port number.
 123  */
 124 COMMAND_HELPER(server_pipe_command, char **out);
 125
 126 COMMAND_HELPER(server_port_command, unsigned short *out);
 127
 128 #define ERROR_SERVER_REMOTE_CLOSED              (-400)
 129 #define ERROR_CONNECTION_REJECTED               (-401)
 130
 131 #endif /* OPENOCD_SERVER_SERVER_H */