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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/ByteBuffer.h>
#include <LibCore/Notifier.h>
#include <LibCore/Socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <unistd.h>
//#define CSOCKET_DEBUG
namespace Core {
Socket::Socket(Type type, Object* parent)
: IODevice(parent)
, m_type(type)
{
register_property(
"source_address", [this] { return m_source_address.to_string(); },
[](auto&) { return false; });
register_property(
"destination_address", [this] { return m_destination_address.to_string(); },
[](auto&) { return false; });
register_property(
"source_port", [this] { return m_source_port; },
[](auto&) { return false; });
register_property(
"destination_port", [this] { return m_destination_port; },
[](auto&) { return false; });
register_property(
"connected", [this] { return m_connected; },
[](auto&) { return false; });
}
Socket::~Socket()
{
close();
}
bool Socket::connect(const String& hostname, int port)
{
auto* hostent = gethostbyname(hostname.characters());
if (!hostent) {
dbgln("Socket::connect: Unable to resolve '{}'", hostname);
return false;
}
IPv4Address host_address((const u8*)hostent->h_addr_list[0]);
#ifdef CSOCKET_DEBUG
dbg() << "Socket::connect: Resolved '" << hostname << "' to " << host_address;
#endif
return connect(host_address, port);
}
void Socket::set_blocking(bool blocking)
{
int flags = fcntl(fd(), F_GETFL, 0);
ASSERT(flags >= 0);
if (blocking)
flags = fcntl(fd(), F_SETFL, flags & ~O_NONBLOCK);
else
flags = fcntl(fd(), F_SETFL, flags | O_NONBLOCK);
ASSERT(flags == 0);
}
bool Socket::connect(const SocketAddress& address, int port)
{
ASSERT(!is_connected());
ASSERT(address.type() == SocketAddress::Type::IPv4);
#ifdef CSOCKET_DEBUG
dbg() << *this << " connecting to " << address << "...";
#endif
ASSERT(port > 0 && port <= 65535);
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
auto ipv4_address = address.ipv4_address();
memcpy(&addr.sin_addr.s_addr, &ipv4_address, sizeof(IPv4Address));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
m_destination_address = address;
m_destination_port = port;
return common_connect((struct sockaddr*)&addr, sizeof(addr));
}
bool Socket::connect(const SocketAddress& address)
{
ASSERT(!is_connected());
ASSERT(address.type() == SocketAddress::Type::Local);
#ifdef CSOCKET_DEBUG
dbg() << *this << " connecting to " << address << "...";
#endif
sockaddr_un saddr;
saddr.sun_family = AF_LOCAL;
auto dest_address = address.to_string();
bool fits = dest_address.copy_characters_to_buffer(saddr.sun_path, sizeof(saddr.sun_path));
if (!fits) {
fprintf(stderr, "Core::Socket: Failed to connect() to %s: Path is too long!\n", dest_address.characters());
errno = EINVAL;
return false;
}
m_destination_address = address;
return common_connect((const sockaddr*)&saddr, sizeof(saddr));
}
bool Socket::common_connect(const struct sockaddr* addr, socklen_t addrlen)
{
auto connected = [this] {
#ifdef CSOCKET_DEBUG
dbg() << *this << " connected!";
#endif
if (!m_connected) {
m_connected = true;
ensure_read_notifier();
if (m_notifier) {
m_notifier->remove_from_parent();
m_notifier = nullptr;
}
if (on_connected)
on_connected();
}
};
int rc = ::connect(fd(), addr, addrlen);
if (rc < 0) {
if (errno == EINPROGRESS) {
#ifdef CSOCKET_DEBUG
dbg() << *this << " connection in progress (EINPROGRESS)";
#endif
m_notifier = Notifier::construct(fd(), Notifier::Event::Write, this);
m_notifier->on_ready_to_write = move(connected);
return true;
}
int saved_errno = errno;
fprintf(stderr, "Core::Socket: Failed to connect() to %s: %s\n", destination_address().to_string().characters(), strerror(saved_errno));
errno = saved_errno;
return false;
}
#ifdef CSOCKET_DEBUG
dbg() << *this << " connected ok!";
#endif
connected();
return true;
}
ByteBuffer Socket::receive(int max_size)
{
auto buffer = read(max_size);
if (eof())
m_connected = false;
return buffer;
}
bool Socket::send(ReadonlyBytes data)
{
ssize_t nsent = ::send(fd(), data.data(), data.size(), 0);
if (nsent < 0) {
set_error(errno);
return false;
}
ASSERT(static_cast<size_t>(nsent) == data.size());
return true;
}
void Socket::did_update_fd(int fd)
{
if (fd < 0) {
if (m_read_notifier) {
m_read_notifier->remove_from_parent();
m_read_notifier = nullptr;
}
if (m_notifier) {
m_notifier->remove_from_parent();
m_notifier = nullptr;
}
return;
}
if (m_connected) {
ensure_read_notifier();
} else {
// I don't think it would be right if we updated the fd while not connected *but* while having a notifier..
ASSERT(!m_read_notifier);
}
}
void Socket::ensure_read_notifier()
{
ASSERT(m_connected);
m_read_notifier = Notifier::construct(fd(), Notifier::Event::Read, this);
m_read_notifier->on_ready_to_read = [this] {
if (!can_read())
return;
if (on_ready_to_read)
on_ready_to_read();
};
}
}
|
