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      1 /*
      2  * Copyright 2008, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef WDS_CONNECTION_H
     27 #define WDS_CONNECTION_H
     28 
     29 #include <unistd.h>
     30 #include <sys/socket.h>
     31 
     32 namespace android {
     33 
     34 namespace WDS {
     35 
     36 class Socket {
     37 public:
     38     Socket(): m_fd(-1) {}
     39     Socket(int fd): m_fd(fd) {}
     40     ~Socket() {
     41         if (m_fd != -1) {
     42             shutdown(m_fd, SHUT_RDWR);
     43             close(m_fd);
     44         }
     45     }
     46     // Open a new socket using PF_INET and SOCK_STREAM
     47     bool open();
     48     int fd() const { return m_fd; }
     49 private:
     50     int m_fd;
     51 };
     52 
     53 class Connection {
     54 public:
     55     Connection(int conn): m_socket(conn) {}
     56     int read(char buf[], size_t length) const {
     57         return recv(m_socket.fd(), buf, length, 0);
     58     }
     59     int write(const char buf[], size_t length) const {
     60         return send(m_socket.fd(), buf, length, 0);
     61     }
     62     int write(const char buf[]) const {
     63         return write(buf, strlen(buf));
     64     }
     65 private:
     66     Socket m_socket;
     67 };
     68 
     69 class ConnectionServer {
     70 public:
     71     ConnectionServer() {}
     72 
     73     // Establish a connection to the local host on the given port.
     74     bool connect(short port);
     75 
     76     // Blocks on the established socket until a new connection arrives.
     77     Connection* accept() const;
     78 private:
     79     Socket m_socket;
     80 };
     81 
     82 } // end namespace WDS
     83 
     84 } // end namespace android
     85 
     86 #endif
     87