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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2005 by Dominic Rath                                    *
   5  *   Dominic.Rath@gmx.de                                                   *
   6  *                                                                         *
   7  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   8  *   oyvind.harboe@zylin.com                                               *
   9  *                                                                         *
  10  *   Copyright (C) 2008 by Spencer Oliver                                  *
  11  *   spen@spen-soft.co.uk                                                  *
  12  ***************************************************************************/
  13
  14 #ifndef OPENOCD_SERVER_SERVER_H
  15 #define OPENOCD_SERVER_SERVER_H
  16
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <helper/log.h>
  22 #include <helper/replacements.h>
  23
  24 #ifdef HAVE_NETINET_IN_H
  25 #include <netinet/in.h>
  26 #endif
  27
  28 enum connection_type {
  29         CONNECTION_TCP,
  30         CONNECTION_PIPE,
  31         CONNECTION_STDINOUT
  32 };
  33
  34 #define CONNECTION_LIMIT_UNLIMITED              (-1)
  35
  36 struct connection {
  37         int fd;
  38         int fd_out;     /* When using pipes we're writing to a different fd */
  39         struct sockaddr_in sin;
  40         struct command_context *cmd_ctx;
  41         struct service *service;
  42         bool input_pending;
  43         void *priv;
  44         struct connection *next;
  45 };
  46
  47 struct service_driver {
  48         /** the name of the server */
  49         const char *name;
  50         /** optional minimal setup to accept a connection during keep-alive */
  51         int (*new_connection_during_keep_alive_handler)(struct connection *connection);
  52         /**
  53          * complete code to accept a new connection.
  54          * If 'new_connection_during_keep_alive_handler' above is present, this can be
  55          * either called alone during the server_loop, or after the function above.
  56          * Check the implementation in gdb_server.
  57          * */
  58         int (*new_connection_handler)(struct connection *connection);
  59         /** callback to handle incoming data */
  60         int (*input_handler)(struct connection *connection);
  61         /** callback to tear down the connection */
  62         int (*connection_closed_handler)(struct connection *connection);
  63         /** called periodically to send keep-alive messages on the connection */
  64         void (*keep_client_alive_handler)(struct connection *connection);
  65 };
  66
  67 struct service {
  68         char *name;
  69         enum connection_type type;
  70         char *port;
  71         unsigned short portnumber;
  72         int fd;
  73         struct sockaddr_in sin;
  74         int max_connections;
  75         struct connection *connections;
  76         int (*new_connection_during_keep_alive)(struct connection *connection);
  77         int (*new_connection)(struct connection *connection);
  78         int (*input)(struct connection *connection);
  79         int (*connection_closed)(struct connection *connection);
  80         void (*keep_client_alive)(struct connection *connection);
  81         void *priv;
  82         struct service *next;
  83 };
  84
  85 int add_service(const struct service_driver *driver, const char *port,
  86                 int max_connections, void *priv);
  87 int remove_service(const char *name, const char *port);
  88
  89 int server_host_os_entry(void);
  90 int server_host_os_close(void);
  91
  92 int server_preinit(void);
  93 int server_init(struct command_context *cmd_ctx);
  94 int server_quit(void);
  95 void server_free(void);
  96 void exit_on_signal(int sig);
  97
  98 void server_keep_clients_alive(void);
  99
 100 int server_loop(struct command_context *command_context);
 101
 102 int server_register_commands(struct command_context *context);
 103
 104 int connection_write(struct connection *connection, const void *data, int len);
 105 int connection_read(struct connection *connection, void *data, int len);
 106
 107 bool openocd_is_shutdown_pending(void);
 108
 109 /**
 110  * Defines an extended command handler function declaration to enable
 111  * access to (and manipulation of) the server port number.
 112  * Call server_port like a normal COMMAND_HANDLER with an extra @a out parameter
 113  * to receive the specified port number.
 114  */
 115 COMMAND_HELPER(server_pipe_command, char **out);
 116
 117 COMMAND_HELPER(server_port_command, unsigned short *out);
 118
 119 #define ERROR_SERVER_REMOTE_CLOSED              (-400)
 120 #define ERROR_CONNECTION_REJECTED               (-401)
 121
 122 #endif /* OPENOCD_SERVER_SERVER_H */