Revision 0:3eb1ce25eac4, committed 2012-06-05

Comitter:

yamaguch

Date:

Tue Jun 05 05:56:49 2012 +0000

Commit message:

1.1.3; fixed 0x00 reception bug

Changed in this revision

diff -r 000000000000 -r 3eb1ce25eac4 ClientSocket.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ClientSocket.cpp	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,228 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "SimpleSocket.h"
+#include <stdarg.h>
+
+ClientSocket::ClientSocket(IpAddr ip, TCPSocket *socket, bool debug)
+        : ip(ip), socket(socket), readable(true), writable(true), preread(-1),
+        state(CONNECTED), debug(debug) {
+    if (socket)
+        socket->setOnEvent(this, &ClientSocket::onTCPSocketEvent);
+}
+
+ClientSocket::ClientSocket(IpAddr ip, int port, float timeout, bool debug)
+        : readable(true), writable(true), preread(-1), debug(debug) {
+    createClientSocket(ip, port, timeout);
+}
+
+ClientSocket::ClientSocket(char *hostname, int port, float timeout, bool debug)
+        : readable(true), writable(true), preread(-1), debug(debug) {
+    Resolver resolver;
+    createClientSocket(resolver.resolve(hostname, debug), port, timeout);
+}
+
+ClientSocket::ClientSocket(const ClientSocket& that) {
+    *this = that;
+    ::printf("cc called\n");
+}
+
+void ClientSocket::createClientSocket(IpAddr ip, int port, float timeout) {
+    this->ip = ip;
+    socket = new TCPSocket();
+    socket->setOnEvent(this, &ClientSocket::onTCPSocketEvent);
+    SocketError err = socket->connect(Host(ip, port));
+    if (!err) {
+        Timer timer;
+        timer.start();
+        state = CONNECTING;
+        while (state == CONNECTING && timer.read() < timeout) {
+            Net::poll();
+            if (state == CONNECTED)
+                return;
+            wait_us(100);
+        }
+    } else
+        DBG(SocketError(err));
+
+    writable = false;
+    state = DISCONNECTED;
+    socket->resetOnEvent();
+    socket->close();
+    delete socket;
+    socket = 0;
+}
+
+IpAddr ClientSocket::getIp() {
+    return ip;
+}
+
+bool ClientSocket::connected() {
+    if (socket)
+        Net::poll();
+
+    if (!readable && state == DISCONNECTED)
+        close();
+
+    return socket != 0;
+}
+
+bool ClientSocket::available() {
+    if (preread != -1)
+        return true;
+
+    if (!readable)
+        Net::poll();
+
+    if (readable) {
+        char c;
+        int ret = socket->recv(&c, 1);
+        if (ret > 0) {
+            preread = c;
+            return true;
+        } else
+            readable = false;
+    }
+
+    if (!readable && state == DISCONNECTED)
+        close();
+
+    return false;
+}
+
+void ClientSocket::onTCPSocketEvent(TCPSocketEvent e) {
+    DBG(SocketEvent(e));
+
+    switch (e) {
+        case TCPSOCKET_CONNECTED:
+            state = CONNECTED;
+            break;
+        case TCPSOCKET_READABLE:
+            readable = true;
+            break;
+        case TCPSOCKET_WRITEABLE:
+            writable = true;
+            break;
+        case TCPSOCKET_DISCONNECTED:
+            state = DISCONNECTED;
+            break;
+    }
+}
+
+int ClientSocket::read() {
+    char c;
+
+    if (preread != -1) {
+        c = preread & 255;
+        preread = -1;
+        return c;
+    }
+
+    int ret = socket->recv(&c, 1);
+    if (ret > 0) {
+        return (int) c & 255;
+    } else {
+        readable = false;
+        return -1;
+    }
+}
+
+int ClientSocket::read(char *buf, int size) {
+    int req = size;
+
+    if (preread != -1 && size > 0) {
+        *buf++ = preread & 255;
+        preread = -1;
+        req--;
+    }
+
+    while (req > 0) {
+        int got = socket->recv(buf, req);
+        if (got > 0) {
+            buf += got;
+            req -= got;
+        } else {
+            readable = false;
+            break;
+        }
+    }
+
+    return size - req;
+}
+
+int ClientSocket::scanf(const char* format, ...) {
+    va_list argp;
+    va_start(argp, format);
+    char buf[256];
+
+    int len = read(buf, sizeof(buf) - 1);
+    if (len <= 0)
+        return 0;
+    buf[len] = '\0';
+
+    int ret = vsscanf(buf, format, argp);
+    va_end(argp);
+    return ret;
+}
+
+int ClientSocket::write(char c) {
+    return write(&c, 1);
+}
+
+int ClientSocket::write(char *buf, int size) {
+    int ret = socket->send(buf, size);
+    if (ret > 0) {
+        return ret;
+    } else {
+        writable = false;
+        return -1;
+    }
+}
+
+int ClientSocket::printf(const char* format, ...) {
+    va_list argp;
+    va_start(argp, format);
+    char buf[256];
+
+    int len = vsnprintf(buf, sizeof(buf), format, argp);
+    va_end(argp);
+    return write(buf, len);
+}
+
+void ClientSocket::close() {
+    if (socket) {
+        readable = false;
+        writable = false;
+        socket->resetOnEvent();
+        socket->close();
+        delete socket;
+        socket = 0;
+    }
+}
+
+ClientSocket::operator bool() {
+    return connected();
+}
+
+void ClientSocket::setDebug(bool debug) {
+    this->debug = debug;
+}
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 DatagramSocket.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DatagramSocket.cpp	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,136 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "EthernetNetIf.h"
+#include "SimpleSocket.h"
+#include <stdarg.h>
+
+DatagramSocket::DatagramSocket(int port, bool debug) : bufsize(512), debug(debug) {
+    host = Host(IpAddr(), port);
+    createDatagramSocket();
+}
+
+DatagramSocket::DatagramSocket(Host host, bool debug) : host(host), bufsize(512), debug(debug) {
+    createDatagramSocket();
+}
+
+DatagramSocket::DatagramSocket(IpAddr ip, int port, bool debug) : host(ip, port), bufsize(512), debug(debug) {
+    createDatagramSocket();
+}
+
+DatagramSocket::~DatagramSocket() {
+    delete[] buf;
+}
+
+void DatagramSocket::createDatagramSocket() {
+    udpSocket.setOnEvent(this, &DatagramSocket::onUDPSocketEvent);
+    UDPSocketErr err = udpSocket.bind(host);
+    DBG(DatagramError(err));
+    buf = new char[bufsize + 1];
+}
+
+int DatagramSocket::write(char *buf, int length) {
+    if (length > bufsize) length = bufsize;
+    this->length = length;
+    memcpy(this->buf, buf, length);
+    return length;
+}
+
+int DatagramSocket::printf(const char* format, ...) {
+    va_list argp;
+    va_start(argp, format);
+    int len = vsnprintf(buf, bufsize, format, argp);
+    va_end(argp);
+    if (len > 0)
+        length = len;
+    return len;
+}
+
+void DatagramSocket::send(Host& host) {
+    DBG("Host = %d.%d.%d.%d:%d\n", host.getIp()[0], host.getIp()[1], host.getIp()[2], host.getIp()[3], host.getPort());
+    Net::poll();
+    int err = udpSocket.sendto(buf, length, &host);
+    DBG(DatagramError((UDPSocketErr) (err < 0 ? err : 0)));
+}
+
+void DatagramSocket::send(IpAddr ip, int port) {
+    DBG("IP = %d.%d.%d.%d, Port = %d\n", ip[0], ip[1], ip[2], ip[3], port);
+    Host host(ip, port);
+    send(host);
+}
+
+void DatagramSocket::send(char *name, int port) {
+    DBG("Name = %s, Port = %d\n", name, port);
+    Resolver resolver;
+    IpAddr ip = resolver.resolve(name, debug);
+    send(ip, port);
+}
+
+int DatagramSocket::read(char *buf, int size) {
+    int len = length < size ? length : size;
+    if (len > 0)
+        memcpy(buf, this->buf, len);
+    return len;
+}
+
+int DatagramSocket::scanf(const char* format, ...) {
+    va_list argp;
+    va_start(argp, format);
+    buf[length] = '\0';
+    int ret = vsscanf(buf, format, argp);
+    va_end(argp);
+    return ret;
+}
+
+int DatagramSocket::receive(Host *host, float timeout) {
+    timer.reset();
+    timer.start();
+    readable = false;
+    length = 0;
+
+    do {
+        Net::poll();
+        if (readable) {
+            Host host2;
+            length = udpSocket.recvfrom(buf, bufsize, &host2);
+            if (length > 0 && host)
+                *host = host2;
+            break;
+        }
+    } while (timer.read() < timeout);
+
+    return length;
+}
+
+void DatagramSocket::setDebug(bool debug) {
+    this->debug = debug;
+}
+
+void DatagramSocket::onUDPSocketEvent(UDPSocketEvent e) {
+    DBG(DatagramEvent(e));
+
+    switch (e) {
+        case UDPSOCKET_READABLE: //The only event for now
+            readable = true;
+            break;
+    }
+}
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 Debug.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Debug.h	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,28 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#ifndef DEBUG_H
+#define DEBUG_H
+
+#define DBG(...) if (debug) { ::printf("%s:%d: ", __FUNCTION__, __LINE__); ::printf(__VA_ARGS__); } else;
+
+#endif
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 EventsErrors.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EventsErrors.cpp	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,141 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "SimpleSocket.h"
+
+SocketEvent::SocketEvent(TCPSocketEvent event) : event(event) {}
+
+char *SocketEvent::toString() {
+    switch (event) {
+        case TCPSOCKET_CONNECTED:
+            return "TCPSOCKET_CONNECTED: Connected to host.\n";
+        case TCPSOCKET_ACCEPT:
+            return "TCPSOCKET_ACCEPT: Client is connected, must call accept() to get a new Socket.\n";
+        case TCPSOCKET_READABLE:
+            return "TCPSOCKET_READABLE: Data in buf.\n";
+        case TCPSOCKET_WRITEABLE:
+            return "TCPSOCKET_WRITEABLE: Can write data to buf.\n";
+        case TCPSOCKET_CONTIMEOUT:
+            return "TCPSOCKET_CONTIMEOUT: Connection timed out.\n";
+        case TCPSOCKET_CONRST:
+            return "TCPSOCKET_CONRST: Connection was reset by remote host.\n";
+        case TCPSOCKET_CONABRT:
+            return "TCPSOCKET_CONABRT: Connection was aborted.\n";
+        case TCPSOCKET_ERROR:
+            return "TCPSOCKET_ERROR: Unknown error.\n";
+        case TCPSOCKET_DISCONNECTED:
+            return "TCPSOCKET_DISCONNECTED: Disconnected.\n";
+        default:
+            static char buf[32];
+            sprintf(buf, "UNKNOWN EVENT (%d).\n", event);
+            return buf;
+    }
+}
+
+SocketEvent::operator char *() {
+    return toString();
+}
+
+SocketEvent::operator int() {
+    return event;
+}
+
+SocketError::SocketError(TCPSocketErr err) : err(err) {};
+
+char *SocketError::toString() {
+    switch (err) {
+        case TCPSOCKET_SETUP:
+            return "TCPSOCKET_SETUP: TCPSocket not properly configured.\n";
+        case TCPSOCKET_TIMEOUT:
+            return "TCPSOCKET_TIMEOUT: Connection timed out.\n";
+        case TCPSOCKET_IF:
+            return "TCPSOCKET_IF: Interface has problems, does not exist or is not initialized.\n";
+        case TCPSOCKET_MEM:
+            return "TCPSOCKET_MEM: Not enough memory.\n";
+        case TCPSOCKET_INUSE:
+            return "TCPSOCKET_INUSE: Interface/Port is in use.\n";
+        case TCPSOCKET_EMPTY:
+            return "TCPSOCKET_EMPTY: Connections queue is empty.\n";
+        case TCPSOCKET_RST:
+            return "TCPSOCKET_RST: Connection was reset by remote host.\n";
+        case TCPSOCKET_OK:
+            return "TCPSOCKET_OK: Success.\n";
+        default:
+            return "TCPSOCKET unknown error occurred.\n";
+    }
+}
+
+SocketError::operator char *() {
+    return toString();
+}
+
+SocketError::operator int() {
+    return err;
+}
+
+DatagramEvent::DatagramEvent(UDPSocketEvent event) : event(event) {}
+
+char *DatagramEvent::toString() {
+    switch (event) {
+        case UDPSOCKET_READABLE:
+            return "UDPSOCKET_READABLE: Data in buf.\n";
+        default:
+            static char buf[32];
+            sprintf(buf, "UNKNOWN EVENT (%d).\n", event);
+            return buf;
+    }
+}
+
+DatagramEvent::operator char *() {
+    return toString();
+}
+
+DatagramEvent::operator int() {
+    return event;
+}
+
+DatagramError::DatagramError(UDPSocketErr err) : err(err) {};
+
+char *DatagramError::toString() {
+    switch (err) {
+        case UDPSOCKET_SETUP:
+            return "UDPSOCKET_SETUP: UDPSocket not properly configured.\n";
+        case UDPSOCKET_IF:
+            return "UDPSOCKET_IF: Interface has problems, does not exist or is not initialized.\n";
+        case UDPSOCKET_MEM:
+            return "UDPSOCKET_MEM: Not enough memory.\n";
+        case UDPSOCKET_INUSE:
+            return "UDPSOCKET_INUSE: Interface/Port is in use.\n";
+        case UDPSOCKET_OK:
+            return "UDPSOCKET_OK: Success.\n";
+        default:
+            return "UDPSOCKET unknown error occurred.\n";
+    }
+}
+
+DatagramError::operator char *() {
+    return toString();
+}
+
+DatagramError::operator int() {
+    return err;
+}
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 Resolver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Resolver.cpp	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,49 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "SimpleSocket.h"
+
+Resolver::Resolver() {}
+
+IpAddr Resolver::resolve(char *name, bool debug) {
+    IpAddr ip;
+    DNSRequest request;
+    
+    if (request.resolve(name) == DNS_OK) {
+        replied = false;
+        request.setOnReply(this, &Resolver::onReply);
+        while (!replied)
+            Net::poll();
+        if (reply == DNS_FOUND)
+            request.getResult(&ip);
+    }
+    
+    DBG("%s -> %d.%d.%d.%d\n", name, ip[0], ip[1], ip[2], ip[3]);
+    
+    return ip;
+}
+
+
+void Resolver::onReply(DNSReply reply) {
+    replied = true;
+    this->reply = reply;
+}
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 ServerSocket.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ServerSocket.cpp	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,75 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "SimpleSocket.h"
+
+ServerSocket::ServerSocket(int port, bool debug)
+        : accepted(false), debug(debug) {
+    ssocket.setOnEvent(this, &ServerSocket::onTCPSocketEvent);
+
+    SocketError bindErr = ssocket.bind(Host(IpAddr(), port));
+    DBG("Init bind... %s\n", bindErr.toString());
+
+    SocketError listenErr = ssocket.listen();
+    DBG("Init listen... %s\n", listenErr.toString());
+}
+
+void ServerSocket::onTCPSocketEvent(TCPSocketEvent e) {
+    DBG(SocketEvent(e));
+
+    switch (e) {
+        case TCPSOCKET_ACCEPT:
+            accepted = true;
+            break;
+        case TCPSOCKET_DISCONNECTED:
+            ssocket.close();
+            break;
+    }
+}
+
+ClientSocket ServerSocket::accept(float timeout) {
+    TCPSocket* socket = 0;
+    Host host;
+    timer.reset();
+    timer.start();
+
+    do {
+        Net::poll();
+        if (accepted) {
+            accepted = false;
+            SocketError err = ssocket.accept(&host, &socket);
+            if (!err) {
+                IpAddr ip = host.getIp();
+                DBG("TCP connection from %d.%d.%d.%d\n", ip[0], ip[1], ip[2], ip[3]);
+                break;
+            } else {
+                DBG("accept error:%s\n", err.toString());
+            }
+        }
+    } while (timer.read() < timeout);
+
+    return ClientSocket(host.getIp(), socket, debug);
+}
+
+void ServerSocket::setDebug(bool debug) {
+    this->debug = debug;
+}
\ No newline at end of file

diff -r 000000000000 -r 3eb1ce25eac4 SimpleSocket.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SimpleSocket.h	Tue Jun 05 05:56:49 2012 +0000
@@ -0,0 +1,489 @@
+/*
+Copyright (c) 2011, Senio Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#ifndef SIMPLE_SOCKET_H
+#define SIMPLE_SOCKET_H
+
+#include "mbed.h"
+#include "TCPSocket.h"
+#include "UDPSocket.h"
+#include "DNSRequest.h"
+#include "Debug.h"
+
+/**
+ * wrapper class of TCPSocketEvent
+ */
+class SocketEvent {
+public:
+    /**
+     * creates a SocketEvent wrapper object.
+     *
+     * @param event TCP socket event number
+     */
+    SocketEvent(TCPSocketEvent event);
+
+    /**
+     * @returns a string representation of the event
+     */
+    char *toString();
+
+    /**
+     * an operator overloading for toString()
+     */
+    operator char *();
+
+    /**
+     * an operator overloading for TCP socket event number
+     */
+    operator int();
+
+private:
+    TCPSocketEvent event;
+};
+
+/**
+ * wrapper class of TCPSocketErr
+ */
+class SocketError {
+public:
+    /**
+     * creates a SocketError wrapper object.
+     *
+     * @param err TCP socket error number
+     */
+    SocketError(TCPSocketErr err);
+
+    /**
+     * @returns a string representation of the error
+     */
+    char *toString();
+
+    /**
+     * an operator overloading for toString().
+     */
+    operator char *();
+
+    /**
+     * an operator overloading for TCP socket error number.
+     */
+    operator int();
+
+private:
+    TCPSocketErr err;
+};
+
+/**
+ * wrapper class of UDPSocketEvent
+ */
+class DatagramEvent {
+public:
+    /**
+     * creates a DatagramEvent wrapper object.
+     *
+     * @param event UDP socket event number
+     */
+    DatagramEvent(UDPSocketEvent event);
+
+    /**
+     * @returns a string representation of the event
+     */
+    char *toString();
+
+    /**
+     * an operator overloading for toString()
+     */
+    operator char *();
+
+    /**
+     * an operator overloading for UDP socket event number
+     */
+    operator int();
+
+private:
+    UDPSocketEvent event;
+};
+
+/**
+ * wrapper class of UDPSocketErr
+ */
+class DatagramError {
+public:
+    /**
+     * creates a DatagramError wrapper object.
+     *
+     * @param err UDP socket error number
+     */
+    DatagramError(UDPSocketErr err);
+
+    /**
+     * @returns a string representation of the error
+     */
+    char *toString();
+
+    /**
+     * an operator overloading for toString().
+     */
+    operator char *();
+
+    /**
+     * an operator overloading for UDP socket error number.
+     */
+    operator int();
+
+private:
+    UDPSocketErr err;
+};
+
+/**
+ * client socket class for communication endpoint
+ */
+class ClientSocket {
+    friend class ServerSocket;
+
+public:
+    /**
+     * creates a ClientSocket object.
+     *
+     * @param ip IP address of the socket
+     * @param port port number of the socket
+     * @param timeout max waiting time until connected
+     * @param debug set true to display debugging information
+     */
+    ClientSocket(IpAddr ip, int port, float timeout = 60, bool debug = false);
+
+    /**
+     * creates a ClientSocket object.
+     *
+     * @param hostname domain/host name of the socket
+     * @param port port number of the socket
+     * @param timeout max waiting time until connected
+     * @param debug set true to display debugging information
+     */
+    ClientSocket(char *hostname, int port, float timeout = 60, bool debug = false);
+
+
+    /**
+     * copy constructor
+     */
+    ClientSocket(const ClientSocket& that);
+     
+    /**
+     * gets the IP address.
+     *
+     * @returns IP address of the socket
+     */
+    IpAddr getIp();
+
+    /**
+     * gets the connection status.
+     *
+     * @returns true if connected, false otherwise
+     */
+    bool connected();
+
+    /**
+     * tests if input data available or not.
+     *
+     * @returns true if incomming data available, false otherwise
+     */
+    bool available();
+
+    /**
+     * reads a char.
+     *
+     * @returns a char from the socket input stream, or -1 if no data available
+     */
+    int read();
+
+    /**
+     * reads data into the specified buffer.
+     *
+     * @param buf input buffer
+     * @param size size of the buffer
+     *
+     * @returns the size of the data read
+     */
+    int read(char *buf, int size);
+
+    /**
+     * scans input stream according to the specified format string.
+     *
+     * @params format scanf format string, corresponding arguments follow
+     *
+     * @returns number of input items assigned
+     */
+    int scanf(const char *format, ...);
+
+    /**
+     * writes a char to the output stream.
+     *
+     * @param c a char to be written to the socket output stream
+     *
+     * @returns positive int if succeeded, or -1 if failed
+     */
+    int write(char c);
+
+    /**
+     * writes an array of chars to the output stream.
+     *
+     * @param buf an array of chars to be written to the socket output stream
+     * @param size number of chars in the array
+     *
+     * @returns number of chars written, or -1 if failed
+     */
+    int write(char *buf, int size);
+
+    /**
+     * prints the data to the socket output stream according to the specified format string.
+     *
+     * @param format printf format string, corresponding arguments follow
+     *
+     * @returns number of chars written, or -1 if failed
+     */
+    int printf(const char *format, ...);
+
+    /**
+     * closes the connection.
+     */
+    void close();
+
+    /**
+     * sets debug mode.
+     *
+     * @param debug true to display debugging information
+     */
+    void setDebug(bool debug);
+
+    /**
+     * an operator shorthand for connected()
+     */
+    operator bool();
+
+private:
+    enum ConnectionState {CONNECTING, CONNECTED, DISCONNECTED};
+    IpAddr ip;
+    TCPSocket *socket;
+    bool readable;
+    bool writable;
+    int preread;
+    ConnectionState state;
+    bool disconnected;
+    bool debug;
+
+    ClientSocket(IpAddr ip, TCPSocket *socket, bool debug = false);
+    void createClientSocket(IpAddr ip, int port, float timeout);
+    void onTCPSocketEvent(TCPSocketEvent e);
+};
+
+/**
+ * server socket class for handling incoming communication requests
+ */
+class ServerSocket {
+public:
+    /**
+     * creates a ServerSocket object.
+     *
+     * @param port port for server socket
+     * @param debug set true to run in debug mode
+     */
+    ServerSocket(int port, bool debug = false);
+
+    /**
+     * waits for a client to connect.
+     *
+     * @param timeout max time (in msec) for waiting for clients to connect
+     *
+     * @returns a socket to talk with the connecting client or a disconnected socket if timed out
+     */
+    ClientSocket accept(float timeout = 5.0);
+
+    /**
+     * sets debug mode.
+     *
+     * @param debug true to run in debug mode, false to normal mode
+     */
+    void setDebug(bool debug);
+
+private:
+    TCPSocket ssocket;
+    bool accepted;
+    Timer timer;
+    bool debug;
+
+    void onTCPSocketEvent(TCPSocketEvent e);
+};
+
+/**
+ * datagram socket class for UDP
+ */
+class DatagramSocket {
+public:
+    /**
+     * creates a DatagramSocket object with the specified port number.
+     *
+     * @param port port for datagram socket
+     * @param debug set true to run in debug mode
+     */
+    DatagramSocket(int port = 0, bool debug = false);
+
+    /**
+     * creates a DatagramSocket object with the specified host.
+     *
+     * @param host host for datagram socket
+     * @param debug set true to run in debug mode
+     */
+    DatagramSocket(Host host, bool debug = false);
+
+    /**
+     * creates a DatagramSocket object with the specified ip address and port number.
+     *
+     * @param ip address for datagram socket
+     * @param port port for datagram socket
+     * @param debug set true to run in debug mode
+     */
+    DatagramSocket(IpAddr ip, int port, bool debug = false);
+
+    /**
+     * destructor for DatagramSocket.
+     */
+    ~DatagramSocket();
+
+    /**
+     * writes data to the socket
+     *
+     * @param buf buffer for data to be written
+     * @param length data length contained in the buffer
+     *
+     * @returns number of chars written
+     */
+    int write(char *buf, int length);
+
+    /**
+     * prints data to the socket according to the specified format string.
+     *
+     * @param format printf format string, corresponding arguments follow
+     *
+     * @returns number of chars written
+     */
+    int printf(const char* format, ...);
+
+    /**
+     * sends data packet to the specified host.
+     *
+     * @param host destination of this packet to be sent
+     */
+    void send(Host& host);
+
+    /**
+     * sends data packet to the specified IP address and port.
+     *
+     * @param ip destination IP address of the data packet
+     * @param port destination port number of the data packet
+     */
+    void send(IpAddr ip, int port);
+
+    /**
+     * sends data packet to the destination of specified name and port.
+     *
+     * @param name destination host name of the data packet
+     * @param port destination port number of the data packet
+     */
+    void send(char *name, int port);
+
+    /**
+     * reads data packet from the datagram socket.
+     *
+     * @param buf buffer to store data
+     * @param size size of the buf
+     *
+     * @returns number of bytes actually stored
+     */
+    int read(char *buf, int size);
+
+    /**
+     * scans data according to the specified format string.
+     *
+     * @param format scanf format string, corresponding arguments follow
+     *
+     * @returns number of input items assigned
+     */
+    int scanf(const char* format, ...);
+
+    /**
+     * receives data packet.
+     *
+     * @param host pointer to the Host object to store the host info, if specified
+     * @param timeout maximum waiting time before data packet comes in
+     *
+     * @returns number of bytes received
+     */
+    int receive(Host *host = 0, float timeout = 5.0);
+    
+    /**
+     * sets debug mode.
+     *
+     * @param debug true to run in debug mode, false to normal mode
+     */
+    void setDebug(bool debug);
+
+private:
+    Host host;
+    UDPSocket udpSocket;
+    Timer timer;
+    bool readable;
+    int length;
+    int bufsize;
+    char *buf;
+    bool debug;
+
+    void createDatagramSocket();
+    void onUDPSocketEvent(UDPSocketEvent e);
+};
+
+/**
+ * a simple DNS resolver
+ */
+class Resolver {
+public:
+    /**
+     * creates a Resolver object
+     */
+    Resolver();
+
+    /**
+     * resolves the specified domain/host name and returns its IP address.
+     *
+     * @param name domain/host name to be resolved or IP address in "nnn.nnn.nnn.nnn" format
+     * @param debug true to display debugging information
+     *
+     * @returns resolved IP address object
+     */
+    IpAddr resolve(char *name, bool debug = false);
+
+private:
+    bool replied;
+    DNSReply reply;
+
+    void onReply(DNSReply reply);
+};
+
+#endif
\ No newline at end of file