1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2017
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
DESCRIPTION:
Abstraction for sockets.
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
ODR-DabMod is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with ODR-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <cstdint>
#include <stdexcept>
#include <string>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <errno.h>
#include <poll.h>
class TCPSocket {
public:
TCPSocket() {
if ((m_sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
throw std::runtime_error("Can't create TCP socket");
}
#if defined(HAVE_SO_NOSIGPIPE)
int val = 1;
if (setsockopt(m_sock, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val))
== SOCKET_ERROR) {
throw std::runtime_error("Can't set SO_NOSIGPIPE");
}
#endif
}
~TCPSocket() {
if (m_sock != -1) {
::close(m_sock);
}
}
TCPSocket(const TCPSocket& other) = delete;
TCPSocket& operator=(const TCPSocket& other) = delete;
TCPSocket(TCPSocket&& other) {
m_sock = other.m_sock;
if (other.m_sock != -1) {
other.m_sock = -1;
}
}
TCPSocket& operator=(TCPSocket&& other)
{
m_sock = other.m_sock;
if (other.m_sock != -1) {
other.m_sock = -1;
}
return *this;
}
bool valid(void) const {
return m_sock != -1;
}
void listen(int port) {
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
const int reuse = 1;
if (setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
throw std::runtime_error("Can't reuse address for TCP socket");
}
if (::bind(m_sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
close();
throw std::runtime_error("Can't bind TCP socket");
}
if (::listen(m_sock, 1) < 0) {
close();
m_sock = -1;
throw std::runtime_error("Can't listen TCP socket");
}
}
void close(void) {
::close(m_sock);
m_sock = -1;
}
TCPSocket accept_with_timeout(int timeout_ms, struct sockaddr_in *client)
{
struct pollfd fds[1];
fds[0].fd = m_sock;
fds[0].events = POLLIN | POLLOUT;
int retval = poll(fds, 1, timeout_ms);
if (retval == -1) {
throw std::runtime_error("TCP Socket accept error: " + std::to_string(errno));
}
else if (retval) {
socklen_t client_len = sizeof(struct sockaddr_in);
int sockfd = accept(m_sock, (struct sockaddr*)&client, &client_len);
TCPSocket s(sockfd);
return s;
}
else {
TCPSocket s(-1);
return s;
}
}
ssize_t sendall(const void *buffer, size_t buflen)
{
uint8_t *buf = (uint8_t*)buffer;
while (buflen > 0) {
/* On Linux, the MSG_NOSIGNAL flag ensures that the process
* would not receive a SIGPIPE and die.
* Other systems have SO_NOSIGPIPE set on the socket for the
* same effect. */
#if defined(HAVE_MSG_NOSIGNAL)
const int flags = MSG_NOSIGNAL;
#else
const int flags = 0;
#endif
ssize_t sent = ::send(m_sock, buf, buflen, flags);
if (sent < 0) {
return -1;
}
else {
buf += sent;
buflen -= sent;
}
}
return buflen;
}
ssize_t recv(void *buffer, size_t length, int flags)
{
return ::recv(m_sock, buffer, length, flags);
}
private:
explicit TCPSocket(int sockfd) {
m_sock = sockfd;
}
int m_sock = -1;
};
|
