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
|
/*************************************************************************/
/* packet_peer_udp_posix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "packet_peer_udp_posix.h"
#ifdef UNIX_ENABLED
#include <errno.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#ifndef NO_FCNTL
#ifdef __HAIKU__
#include <fcntl.h>
#else
#include <sys/fcntl.h>
#endif
#else
#include <sys/ioctl.h>
#endif
#ifdef JAVASCRIPT_ENABLED
#include <arpa/inet.h>
#endif
int PacketPeerUDPPosix::get_available_packet_count() const {
Error err = const_cast<PacketPeerUDPPosix*>(this)->_poll(false);
if (err!=OK)
return 0;
return queue_count;
}
Error PacketPeerUDPPosix::get_packet(const uint8_t **r_buffer,int &r_buffer_size) const{
Error err = const_cast<PacketPeerUDPPosix*>(this)->_poll(false);
if (err!=OK)
return err;
if (queue_count==0)
return ERR_UNAVAILABLE;
uint32_t size;
rb.read((uint8_t*)&packet_ip.host,4,true);
rb.read((uint8_t*)&packet_port,4,true);
rb.read((uint8_t*)&size,4,true);
rb.read(packet_buffer,size,true);
--queue_count;
*r_buffer=packet_buffer;
r_buffer_size=size;
return OK;
}
Error PacketPeerUDPPosix::put_packet(const uint8_t *p_buffer,int p_buffer_size){
int sock = _get_socket();
ERR_FAIL_COND_V( sock == -1, FAILED );
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(peer_port);
addr.sin_addr = *((struct in_addr*)&peer_addr.host);
errno = 0;
int err;
while ( (err = sendto(sock, p_buffer, p_buffer_size, 0, (struct sockaddr*)&addr, sizeof(addr))) != p_buffer_size) {
if (errno != EAGAIN) {
return FAILED;
}
}
return OK;
}
int PacketPeerUDPPosix::get_max_packet_size() const{
return 512; // uhm maybe not
}
Error PacketPeerUDPPosix::listen(int p_port, int p_recv_buffer_size){
close();
int sock = _get_socket();
if (sock == -1 )
return ERR_CANT_CREATE;
sockaddr_in addr = {0};
addr.sin_family = AF_INET;
addr.sin_port = htons(p_port);
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(sock, (struct sockaddr*)&addr, sizeof(sockaddr_in)) == -1 ) {
close();
return ERR_UNAVAILABLE;
}
rb.resize(nearest_shift(p_recv_buffer_size));
return OK;
}
void PacketPeerUDPPosix::close(){
if (sockfd != -1)
::close(sockfd);
sockfd=-1;
rb.resize(8);
queue_count=0;
}
Error PacketPeerUDPPosix::wait() {
return _poll(true);
}
Error PacketPeerUDPPosix::_poll(bool p_wait) {
struct sockaddr_in from = {0};
socklen_t len = sizeof(struct sockaddr_in);
int ret;
while ( (ret = recvfrom(sockfd, recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-12, 0)), p_wait?0:MSG_DONTWAIT, (struct sockaddr*)&from, &len)) > 0) {
rb.write((uint8_t*)&from.sin_addr, 4);
uint32_t port = ntohs(from.sin_port);
rb.write((uint8_t*)&port, 4);
rb.write((uint8_t*)&ret, 4);
rb.write(recv_buffer, ret);
len = sizeof(struct sockaddr_in);
++queue_count;
};
// TODO: Should ECONNRESET be handled here?
if (ret == 0 || (ret == -1 && errno != EAGAIN) ) {
close();
return FAILED;
};
return OK;
}
bool PacketPeerUDPPosix::is_listening() const{
return sockfd!=-1;
}
IP_Address PacketPeerUDPPosix::get_packet_address() const {
return packet_ip;
}
int PacketPeerUDPPosix::get_packet_port() const{
return packet_port;
}
int PacketPeerUDPPosix::_get_socket() {
if (sockfd != -1)
return sockfd;
sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
ERR_FAIL_COND_V( sockfd == -1, -1 );
//fcntl(sockfd, F_SETFL, O_NONBLOCK);
return sockfd;
}
void PacketPeerUDPPosix::set_send_address(const IP_Address& p_address,int p_port) {
peer_addr=p_address;
peer_port=p_port;
}
PacketPeerUDP* PacketPeerUDPPosix::_create() {
return memnew(PacketPeerUDPPosix);
};
void PacketPeerUDPPosix::make_default() {
PacketPeerUDP::_create = PacketPeerUDPPosix::_create;
};
PacketPeerUDPPosix::PacketPeerUDPPosix() {
sockfd=-1;
packet_port=0;
queue_count=0;
peer_port=0;
}
PacketPeerUDPPosix::~PacketPeerUDPPosix() {
close();
}
#endif
|