socket.cc revision 2665:a124942bacb8 
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 * Authors: Nathan Binkert
29 */
30
31#include <sys/types.h>
32#include <sys/socket.h>
33
34#include <netinet/in.h>
35#include <netinet/tcp.h>
36
37#include <errno.h>
38#include <unistd.h>
39
40#include "sim/host.hh"
41#include "base/misc.hh"
42#include "base/socket.hh"
43
44using namespace std;
45
46////////////////////////////////////////////////////////////////////////
47//
48//
49
50ListenSocket::ListenSocket()
51    : listening(false), fd(-1)
52{}
53
54ListenSocket::~ListenSocket()
55{
56    if (fd != -1)
57        close(fd);
58}
59
60// Create a socket and configure it for listening
61bool
62ListenSocket::listen(int port, bool reuse)
63{
64    if (listening)
65        panic("Socket already listening!");
66
67    fd = ::socket(PF_INET, SOCK_STREAM, 0);
68    if (fd < 0)
69        panic("Can't create socket:%s !", strerror(errno));
70
71    if (reuse) {
72        int i = 1;
73        if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&i,
74                         sizeof(i)) < 0)
75            panic("ListenSocket(listen): setsockopt() SO_REUSEADDR failed!");
76    }
77
78    struct sockaddr_in sockaddr;
79    sockaddr.sin_family = PF_INET;
80    sockaddr.sin_addr.s_addr = INADDR_ANY;
81
82    sockaddr.sin_port = htons(port);
83    int ret = ::bind(fd, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
84    if (ret != 0) {
85        if (ret == -1 && errno != EADDRINUSE)
86            panic("ListenSocket(listen): bind() failed!");
87        return false;
88    }
89
90    if (::listen(fd, 1) == -1)
91        panic("ListenSocket(listen): listen() failed!");
92
93    listening = true;
94
95    return true;
96}
97
98
99// Open a connection.  Accept will block, so if you don't want it to,
100// make sure a connection is ready before you call accept.
101int
102ListenSocket::accept(bool nodelay)
103{
104    struct sockaddr_in sockaddr;
105    socklen_t slen = sizeof (sockaddr);
106    int sfd = ::accept(fd, (struct sockaddr *)&sockaddr, &slen);
107    if (sfd != -1 && nodelay) {
108        int i = 1;
109        ::setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (char *)&i, sizeof(i));
110    }
111
112    return sfd;
113}
114