socket.cc revision 2632:1bb2f91485ea 
1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: 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 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <sys/socket.h>
31
32#include <netinet/in.h>
33#include <netinet/tcp.h>
34
35#include <errno.h>
36#include <unistd.h>
37
38#include "sim/host.hh"
39#include "base/misc.hh"
40#include "base/socket.hh"
41
42using namespace std;
43
44////////////////////////////////////////////////////////////////////////
45//
46//
47
48ListenSocket::ListenSocket()
49    : listening(false), fd(-1)
50{}
51
52ListenSocket::~ListenSocket()
53{
54    if (fd != -1)
55        close(fd);
56}
57
58// Create a socket and configure it for listening
59bool
60ListenSocket::listen(int port, bool reuse)
61{
62    if (listening)
63        panic("Socket already listening!");
64
65    fd = ::socket(PF_INET, SOCK_STREAM, 0);
66    if (fd < 0)
67        panic("Can't create socket:%s !", strerror(errno));
68
69    if (reuse) {
70        int i = 1;
71        if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&i,
72                         sizeof(i)) < 0)
73            panic("ListenSocket(listen): setsockopt() SO_REUSEADDR failed!");
74    }
75
76    struct sockaddr_in sockaddr;
77    sockaddr.sin_family = PF_INET;
78    sockaddr.sin_addr.s_addr = INADDR_ANY;
79
80    sockaddr.sin_port = htons(port);
81    int ret = ::bind(fd, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
82    if (ret != 0) {
83        if (ret == -1 && errno != EADDRINUSE)
84            panic("ListenSocket(listen): bind() failed!");
85        return false;
86    }
87
88    if (::listen(fd, 1) == -1)
89        panic("ListenSocket(listen): listen() failed!");
90
91    listening = true;
92
93    return true;
94}
95
96
97// Open a connection.  Accept will block, so if you don't want it to,
98// make sure a connection is ready before you call accept.
99int
100ListenSocket::accept(bool nodelay)
101{
102    struct sockaddr_in sockaddr;
103    socklen_t slen = sizeof (sockaddr);
104    int sfd = ::accept(fd, (struct sockaddr *)&sockaddr, &slen);
105    if (sfd != -1 && nodelay) {
106        int i = 1;
107        ::setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (char *)&i, sizeof(i));
108    }
109
110    return sfd;
111}
112