4 /* transport - low level communication (send/receive bunches of bytes) */
5 /* module's public interface exported to end user. */
7 /* Copyright (c) 2004 Martin Quinson. All rights reserved. */
9 /* This program is free software; you can redistribute it and/or modify it
10 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #ifndef GRAS_TRANSPORT_H
13 #define GRAS_TRANSPORT_H
15 /** \addtogroup GRAS_sock
16 * \brief Socket handling
18 * The model of communications in GRAS is very close to the BSD socket one.
19 * To get two hosts exchanging data, one of them need to open a
20 * <i>server</i> socket on which it can listen for incoming messages and the
21 * other one must connect a <i>client</i> socket onto the server one.
23 * The main difference is that you cannot exchange arbitrary bytes on
24 * sockets, but messages. See the \ref GRAS_msg section for details.
26 * If you need an example of how to use sockets, check \ref GRAS_ex_ping.
30 /** \defgroup GRAS_sock_create Socket creation functions
35 /** \brief Opaque type describing a socket */
36 typedef struct s_gras_socket *gras_socket_t;
38 /** \brief Simply create a client socket (to speak to a remote host) */
39 XBT_PUBLIC gras_socket_t gras_socket_client(const char *host, unsigned short port);
40 XBT_PUBLIC gras_socket_t gras_socket_client_from_string(const char *host);
41 /** \brief Simply create a server socket (to ear from remote hosts speaking to you) */
42 XBT_PUBLIC gras_socket_t gras_socket_server(unsigned short port);
43 XBT_PUBLIC void gras_socket_close(gras_socket_t sd);
45 /** \brief Create a client socket, full interface to all relevant settings */
46 XBT_PUBLIC gras_socket_t gras_socket_client_ext(const char *host,
48 unsigned long int bufSize,
50 /** \brief Create a server socket, full interface to all relevant settings */
51 XBT_PUBLIC gras_socket_t gras_socket_server_ext(unsigned short port,
52 unsigned long int bufSize,
54 XBT_PUBLIC gras_socket_t
55 gras_socket_server_range(unsigned short minport, unsigned short maxport,
56 unsigned long int buf_size, int measurement);
59 /** \defgroup GRAS_sock_info Retrieving data about sockets and peers
62 * Who are you talking to?
66 /** Get the port number on which this socket is connected on my side */
67 XBT_PUBLIC int gras_socket_my_port (gras_socket_t sock);
68 /** Get the port number on which this socket is connected on remote side */
69 XBT_PUBLIC int gras_socket_peer_port(gras_socket_t sock);
70 /** Get the host name of the remote side */
71 XBT_PUBLIC char *gras_socket_peer_name(gras_socket_t sock);
72 /** Get the process name of the remote side */
73 XBT_PUBLIC char *gras_socket_peer_proc(gras_socket_t sock);
76 /** \defgroup GRAS_sock_meas Using measurement sockets
79 * You may want to use sockets not to exchange valuable data (in messages),
80 * but to conduct some bandwidth measurements and related experiments. If so, try those measurement sockets.
82 * You can only use those functions on sockets openned with the "measurement" boolean set to true.
89 XBT_PUBLIC int gras_socket_is_meas(gras_socket_t sock);
90 XBT_PUBLIC void gras_socket_meas_send(gras_socket_t peer,
92 unsigned long int msgSize,
93 unsigned long int msgAmount);
94 XBT_PUBLIC void gras_socket_meas_recv(gras_socket_t peer,
96 unsigned long int msgSize,
97 unsigned long int msgAmount);
98 XBT_PUBLIC gras_socket_t gras_socket_meas_accept(gras_socket_t peer);
102 /** \defgroup GRAS_sock_file Using files as sockets
106 * For debugging purpose, it is possible to deal with files as if they were sockets.
107 * It can even be useful to store stuff in a portable manner, but writing messages to a file
110 * \bug Don't use '-' on windows. this file represents stdin or stdout, but I failed to deal with it on windows.
113 /* debuging functions */
114 XBT_PUBLIC gras_socket_t gras_socket_client_from_file(const char*path);
115 XBT_PUBLIC gras_socket_t gras_socket_server_from_file(const char*path);
119 #endif /* GRAS_TRANSPORT_H */