+++ /dev/null
-/* $Id$ */
-
-/* transport - low level communication */
-
-/* Copyright (c) 2004 Martin Quinson. All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "xbt/ex.h"
-#include "xbt/peer.h"
-#include "portable.h"
-#include "gras/Transport/transport_private.h"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp,gras,"Conveying bytes over the network");
-XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas,gras_trp,"Conveying bytes over the network without formating for perf measurements");
-static short int _gras_trp_started = 0;
-
-static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
-static void gras_trp_plugin_free(void *p); /* free one of the plugins */
-
-static void
-gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
- xbt_ex_t e;
-
- gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
-
- DEBUG1("Create plugin %s",name);
-
- plug->name=xbt_strdup(name);
-
- TRY {
- setup(plug);
- } CATCH(e) {
- if (e.category == mismatch_error) {
- /* SG plugin raise mismatch when in RL mode (and vice versa) */
- free(plug->name);
- free(plug);
- plug=NULL;
- xbt_ex_free(e);
- } else {
- RETHROW;
- }
- }
-
- if (plug)
- xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
-}
-
-void gras_trp_init(void){
- if (!_gras_trp_started) {
- /* make room for all plugins */
- _gras_trp_plugins=xbt_dict_new();
-
-#ifdef HAVE_WINSOCK2_H
- /* initialize the windows mechanism */
- {
- WORD wVersionRequested;
- WSADATA wsaData;
-
- wVersionRequested = MAKEWORD( 2, 0 );
- xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
- "Cannot find a usable WinSock DLL");
-
- /* Confirm that the WinSock DLL supports 2.0.*/
- /* Note that if the DLL supports versions greater */
- /* than 2.0 in addition to 2.0, it will still return */
- /* 2.0 in wVersion since that is the version we */
- /* requested. */
-
- xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
- HIBYTE( wsaData.wVersion ) == 0,
- "Cannot find a usable WinSock DLL");
- INFO0("Found and initialized winsock2");
- } /* The WinSock DLL is acceptable. Proceed. */
-#elif HAVE_WINSOCK_H
- { WSADATA wsaData;
- xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
- "Cannot find a usable WinSock DLL");
- INFO0("Found and initialized winsock");
- }
-#endif
-
- /* Add plugins */
- gras_trp_plugin_new("file",gras_trp_file_setup);
- gras_trp_plugin_new("sg",gras_trp_sg_setup);
- gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
- }
-
- _gras_trp_started++;
-}
-
-void
-gras_trp_exit(void){
- xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
- gras_socket_t sock_iter;
- int cursor;
-
- if (_gras_trp_started == 0) {
- return;
- }
-
- if ( --_gras_trp_started == 0 ) {
-#ifdef HAVE_WINSOCK_H
- if ( WSACleanup() == SOCKET_ERROR ) {
- if ( WSAGetLastError() == WSAEINPROGRESS ) {
- WSACancelBlockingCall();
- WSACleanup();
- }
- }
-#endif
-
- /* Close all the sockets */
- xbt_dynar_foreach(sockets,cursor,sock_iter) {
- VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
- sock_iter);
- gras_socket_close(sock_iter);
- }
-
- /* Delete the plugins */
- xbt_dict_free(&_gras_trp_plugins);
- }
-}
-
-
-void gras_trp_plugin_free(void *p) {
- gras_trp_plugin_t plug = p;
-
- if (plug) {
- if (plug->exit) {
- plug->exit(plug);
- } else if (plug->data) {
- DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
- free(plug->data);
- }
-
- free(plug->name);
- free(plug);
- }
-}
-
-
-/**
- * gras_trp_socket_new:
- *
- * Malloc a new socket, and initialize it with defaults
- */
-void gras_trp_socket_new(int incoming,
- gras_socket_t *dst) {
-
- gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
-
- VERB1("Create a new socket (%p)", (void*)sock);
-
- sock->plugin = NULL;
-
- sock->incoming = incoming ? 1:0;
- sock->outgoing = incoming ? 0:1;
- sock->accepting = incoming ? 1:0;
- sock->meas = 0;
- sock->recv_ok = 1;
- sock->valid = 1;
- sock->moredata = 0;
-
- sock->sd = -1;
- sock->port = -1;
- sock->peer_port = -1;
- sock->peer_name = NULL;
- sock->peer_proc = NULL;
-
- sock->data = NULL;
- sock->bufdata = NULL;
-
- *dst = sock;
-
- xbt_dynar_push(((gras_trp_procdata_t)
- gras_libdata_by_id(gras_trp_libdata_id))->sockets,dst);
- XBT_OUT;
-}
-
-/**
- * @brief Opens a server socket and makes it ready to be listened to.
- * @param port: port on which you want to listen
- * @param buf_size: size of the buffer (in byte) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
- * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
- *
- * In real life, you'll get a TCP socket.
- */
-gras_socket_t
-gras_socket_server_ext(unsigned short port,
-
- unsigned long int buf_size,
- int measurement) {
-
- xbt_ex_t e;
- gras_trp_plugin_t trp;
- gras_socket_t sock;
-
- DEBUG2("Create a server socket from plugin %s on port %d",
- gras_if_RL() ? "tcp" : "sg",
- port);
- trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
-
- /* defaults settings */
- gras_trp_socket_new(1,&sock);
- sock->plugin= trp;
- sock->port=port;
- sock->buf_size = buf_size>0 ? buf_size : 32*1024;
- sock->meas = measurement;
-
- /* Call plugin socket creation function */
- DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
- TRY {
- trp->socket_server(trp, sock);
- DEBUG3("in=%c out=%c accept=%c",
- sock->incoming?'y':'n',
- sock->outgoing?'y':'n',
- sock->accepting?'y':'n');
- } CATCH(e) {
- int cursor;
- gras_socket_t sock_iter;
- xbt_dynar_t socks = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
- xbt_dynar_foreach(socks, cursor, sock_iter) {
- if (sock_iter==sock)
- xbt_dynar_cursor_rm(socks,&cursor);
- }
- free(sock);
- RETHROW;
- }
-
- if (!measurement)
- ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport = port;
- return sock;
-}
-/**
- * @brief Opens a server socket on any port in the given range
- *
- * @param minport: first port we will try
- * @param maxport: last port we will try
- * @param buf_size: size of the buffer (in byte) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
- * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
- *
- * If none of the provided ports works, raises the exception got when trying the last possibility
- */
-gras_socket_t
-gras_socket_server_range(unsigned short minport, unsigned short maxport,
- unsigned long int buf_size, int measurement) {
-
- int port;
- gras_socket_t res=NULL;
- xbt_ex_t e;
-
- for (port=minport; port<maxport;port ++) {
- TRY {
- res=gras_socket_server_ext(port,buf_size,measurement);
- } CATCH(e) {
- if (port==maxport)
- RETHROW;
- xbt_ex_free(e);
- }
- if (res)
- return res;
- }
- THROW_IMPOSSIBLE;
-}
-
-/**
- * @brief Opens a client socket to a remote host.
- * @param host: who you want to connect to
- * @param port: where you want to connect to on this host
- * @param buf_size: size of the buffer (in bytes) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
- * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
- *
- * In real life, you'll get a TCP socket.
- */
-gras_socket_t
-gras_socket_client_ext(const char *host,
- unsigned short port,
-
- unsigned long int buf_size,
- int measurement) {
-
- xbt_ex_t e;
- gras_trp_plugin_t trp;
- gras_socket_t sock;
-
- trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
-
- DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
- /* defaults settings */
- gras_trp_socket_new(0,&sock);
- sock->plugin= trp;
- sock->peer_port = port;
- sock->peer_name = (char*)strdup(host?host:"localhost");
- sock->buf_size = buf_size>0 ? buf_size: 32*1024;
- sock->meas = measurement;
-
- /* plugin-specific */
- TRY {
- (*trp->socket_client)(trp, sock);
- DEBUG3("in=%c out=%c accept=%c",
- sock->incoming?'y':'n',
- sock->outgoing?'y':'n',
- sock->accepting?'y':'n');
- } CATCH(e) {
- free(sock);
- RETHROW;
- }
-
- return sock;
-}
-
-/**
- * gras_socket_server:
- *
- * Opens a server socket and make it ready to be listened to.
- * In real life, you'll get a TCP socket.
- */
-gras_socket_t
-gras_socket_server(unsigned short port) {
- return gras_socket_server_ext(port,32*1024,0);
-}
-
-/** @brief Opens a client socket to a remote host */
-gras_socket_t
-gras_socket_client(const char *host,
- unsigned short port) {
- return gras_socket_client_ext(host,port,0,0);
-}
-
-/** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
-gras_socket_t
-gras_socket_client_from_string(const char *host) {
- xbt_peer_t p = xbt_peer_from_string(host);
- gras_socket_t res = gras_socket_client_ext(p->name,p->port,0,0);
- xbt_peer_free(p);
- return res;
-}
-
-/** \brief Close socket */
-void gras_socket_close(gras_socket_t sock) {
- xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
- gras_socket_t sock_iter;
- int cursor;
-
- XBT_IN;
- VERB1("Close %p",sock);
- if (sock == _gras_lastly_selected_socket) {
- if (sock->moredata)
- CRITICAL0("Closing a socket which had another message buffered after the one being handled now. Go fix your code.");
- _gras_lastly_selected_socket=NULL;
- }
-
- /* FIXME: Issue an event when the socket is closed */
- if (sock) {
- xbt_dynar_foreach(sockets,cursor,sock_iter) {
- if (sock == sock_iter) {
- xbt_dynar_cursor_rm(sockets,&cursor);
- if (sock->plugin->socket_close)
- (* sock->plugin->socket_close)(sock);
-
- /* free the memory */
- if (sock->peer_name)
- free(sock->peer_name);
- free(sock);
- XBT_OUT;
- return;
- }
- }
- WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",sock);
- xbt_backtrace_display();
- }
- XBT_OUT;
-}
-
-/**
- * gras_trp_send:
- *
- * Send a bunch of bytes from on socket
- * (stable if we know the storage will keep as is until the next trp_flush)
- */
-void
-gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
- xbt_assert0(sd->outgoing,"Socket not suited for data send");
- (*sd->plugin->send)(sd,data,size,stable);
-}
-/**
- * gras_trp_chunk_recv:
- *
- * Receive a bunch of bytes from a socket
- */
-void
-gras_trp_recv(gras_socket_t sd, char *data, long int size) {
- xbt_assert0(sd->incoming,"Socket not suited for data receive");
- (sd->plugin->recv)(sd,data,size);
-}
-
-/**
- * gras_trp_flush:
- *
- * Make sure all pending communications are done
- */
-void
-gras_trp_flush(gras_socket_t sd) {
- if (sd->plugin->flush)
- (sd->plugin->flush)(sd);
-}
-
-gras_trp_plugin_t
-gras_trp_plugin_get_by_name(const char *name){
- return xbt_dict_get(_gras_trp_plugins,name);
-}
-
-int gras_socket_my_port (gras_socket_t sock) {
- return sock->port;
-}
-int gras_socket_peer_port(gras_socket_t sock) {
- return sock->peer_port;
-}
-char *gras_socket_peer_name(gras_socket_t sock) {
- return sock->peer_name;
-}
-char *gras_socket_peer_proc(gras_socket_t sock) {
- return sock->peer_proc;
-}
-
-void gras_socket_peer_proc_set(gras_socket_t sock,char*peer_proc) {
- sock->peer_proc = peer_proc;
-}
-
-/** \brief Check if the provided socket is a measurement one (or a regular one) */
-int gras_socket_is_meas(gras_socket_t sock) {
- return sock->meas;
-}
-
-/** \brief Send a chunk of (random) data over a measurement socket
- *
- * @param peer measurement socket to use for the experiment
- * @param timeout timeout (in seconds)
- * @param exp_size total amount of data to send (in bytes).
- * @param msg_size size of each chunk sent over the socket (in bytes).
- *
- * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
- * each side of the socket should be paired.
- *
- * The exchanged data is zeroed to make sure it's initialized, but
- * there is no way to control what is sent (ie, you cannot use these
- * functions to exchange data out of band).
- */
-void gras_socket_meas_send(gras_socket_t peer,
- unsigned int timeout,
- unsigned long int exp_size,
- unsigned long int msg_size) {
- char *chunk=NULL;
- unsigned long int exp_sofar;
-
- XBT_IN;
-
- if (gras_if_RL())
- chunk=xbt_malloc0(msg_size);
-
- xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
- xbt_assert0(peer->outgoing,"Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
-
- for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
- CDEBUG5(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
- exp_sofar,exp_size,msg_size,
- gras_socket_peer_name(peer), gras_socket_peer_port(peer));
- (*peer->plugin->raw_send)(peer,chunk,msg_size);
- }
- CDEBUG5(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
- exp_sofar,exp_size,msg_size,
- gras_socket_peer_name(peer), gras_socket_peer_port(peer));
-
- if (gras_if_RL())
- free(chunk);
-
- XBT_OUT;
-}
-
-/** \brief Receive a chunk of data over a measurement socket
- *
- * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
- * each side of the socket should be paired.
- */
-void gras_socket_meas_recv(gras_socket_t peer,
- unsigned int timeout,
- unsigned long int exp_size,
- unsigned long int msg_size){
-
- char *chunk=NULL;
- unsigned long int exp_sofar;
-
- XBT_IN;
-
- if (gras_if_RL())
- chunk = xbt_malloc(msg_size);
-
- xbt_assert0(peer->meas,
- "Asked to receive measurement data on a regular socket");
- xbt_assert0(peer->incoming,"Socket not suited for data receive");
-
- for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
- CDEBUG5(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
- exp_sofar,exp_size,msg_size,
- gras_socket_peer_name(peer), gras_socket_peer_port(peer));
- (peer->plugin->raw_recv)(peer,chunk,msg_size);
- }
- CDEBUG5(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
- exp_sofar,exp_size,msg_size,
- gras_socket_peer_name(peer), gras_socket_peer_port(peer));
-
- if (gras_if_RL())
- free(chunk);
- XBT_OUT;
-}
-
-/**
- * \brief Something similar to the good old accept system call.
- *
- * Make sure that there is someone speaking to the provided server socket.
- * In RL, it does an accept(2) and return the result as last argument.
- * In SG, as accepts are useless, it returns the provided argument as result.
- * You should thus test whether (peer != accepted) before closing both of them.
- *
- * You should only call this on measurement sockets. It is automatically
- * done for regular sockets, but you usually want more control about
- * what's going on with measurement sockets.
- */
-gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
- gras_socket_t res;
-
- xbt_assert0(peer->meas,
- "No need to accept on non-measurement sockets (it's automatic)");
-
- if (!peer->accepting) {
- /* nothing to accept here (must be in SG) */
- /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket*/
- return peer;
- }
-
- res = (peer->plugin->socket_accept)(peer);
- res->meas = peer->meas;
- CDEBUG1(gras_trp_meas,"meas_accepted onto %d",res->sd);
-
- return res;
-}
-
-
-/*
- * Creating procdata for this module
- */
-static void *gras_trp_procdata_new() {
- gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
-
- res->name = xbt_strdup("gras_trp");
- res->name_len = 0;
- res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
- res->myport = 0;
-
- return (void*)res;
-}
-
-/*
- * Freeing procdata for this module
- */
-static void gras_trp_procdata_free(void *data) {
- gras_trp_procdata_t res = (gras_trp_procdata_t)data;
-
- xbt_dynar_free(&( res->sockets ));
- free(res->name);
- free(res);
-}
-
-void gras_trp_socketset_dump(const char *name) {
- gras_trp_procdata_t procdata =
- (gras_trp_procdata_t)gras_libdata_by_id(gras_trp_libdata_id);
-
- int it;
- gras_socket_t s;
-
- INFO1("** Dump the socket set %s",name);
- xbt_dynar_foreach(procdata->sockets, it, s) {
- INFO4(" %p -> %s:%d %s",
- s,gras_socket_peer_name(s),gras_socket_peer_port(s),
- s->valid?"(valid)":"(peer dead)");
- }
- INFO1("** End of socket set %s",name);
-}
-
-/*
- * Module registration
- */
-int gras_trp_libdata_id;
-void gras_trp_register() {
- gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
-}
-
-int gras_os_myport(void) {
- return ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;
-}
-
