socket.cc revision 5523 
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
46bool ListenSocket::listeningDisabled = false;
47bool ListenSocket::anyListening = false;
48
49void
50ListenSocket::disableAll()
51{
52    if (anyListening)
53        panic("Too late to disable all listeners, already have a listener");
54    listeningDisabled = true;
55}
56
57bool
58ListenSocket::allDisabled()
59{
60    return listeningDisabled;
61}
62
63////////////////////////////////////////////////////////////////////////
64//
65//
66
67ListenSocket::ListenSocket()
68    : listening(false), fd(-1)
69{}
70
71ListenSocket::~ListenSocket()
72{
73    if (fd != -1)
74        close(fd);
75}
76
77// Create a socket and configure it for listening
78bool
79ListenSocket::listen(int port, bool reuse)
80{
81    if (listening)
82        panic("Socket already listening!");
83
84    fd = ::socket(PF_INET, SOCK_STREAM, 0);
85    if (fd < 0)
86        panic("Can't create socket:%s !", strerror(errno));
87
88    if (reuse) {
89        int i = 1;
90        if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&i,
91                         sizeof(i)) < 0)
92            panic("ListenSocket(listen): setsockopt() SO_REUSEADDR failed!");
93    }
94
95    struct sockaddr_in sockaddr;
96    sockaddr.sin_family = PF_INET;
97    sockaddr.sin_addr.s_addr = INADDR_ANY;
98
99    sockaddr.sin_port = htons(port);
100    int ret = ::bind(fd, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
101    if (ret != 0) {
102        if (ret == -1 && errno != EADDRINUSE)
103            panic("ListenSocket(listen): bind() failed!");
104        return false;
105    }
106
107    if (::listen(fd, 1) == -1)
108        panic("ListenSocket(listen): listen() failed!");
109
110    listening = true;
111
112    anyListening = true;
113    return true;
114}
115
116
117// Open a connection.  Accept will block, so if you don't want it to,
118// make sure a connection is ready before you call accept.
119int
120ListenSocket::accept(bool nodelay)
121{
122    struct sockaddr_in sockaddr;
123    socklen_t slen = sizeof (sockaddr);
124    int sfd = ::accept(fd, (struct sockaddr *)&sockaddr, &slen);
125    if (sfd != -1 && nodelay) {
126        int i = 1;
127        ::setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (char *)&i, sizeof(i));
128    }
129
130    return sfd;
131}
132