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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include <curl/curl.h>
#include "backends/networking/curl/socket.h"
#include "backends/networking/curl/connectionmanager.h"
#include "common/debug.h"
#include "common/system.h"
// Auxiliary function that waits on the socket.
// From https://github.com/curl/curl/blob/master/docs/examples/sendrecv.c
static int waitOnSocket(curl_socket_t sockfd, int for_recv, long timeout_ms) {
struct timeval tv {};
fd_set infd {}, outfd {}, errfd {};
int res;
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms % 1000) * 1000;
FD_ZERO(&infd);
FD_ZERO(&outfd);
FD_ZERO(&errfd);
FD_SET(sockfd, &errfd); /* always check for error */
if(for_recv) {
FD_SET(sockfd, &infd);
} else {
FD_SET(sockfd, &outfd);
}
/* select() returns the number of signalled sockets or -1 */
res = select((int)sockfd + 1, &infd, &outfd, &errfd, &tv);
return res;
}
namespace Networking {
CurlSocket::CurlSocket() {
_easy = nullptr;
_socket = 0;
}
CurlSocket::~CurlSocket() {
// Always clean up.
curl_easy_cleanup(_easy);
}
int CurlSocket::ready() {
return waitOnSocket(_socket, 1, 0);
}
bool CurlSocket::connect(const Common::String &url) {
_easy = curl_easy_init();
if (_easy) {
curl_easy_setopt(_easy, CURLOPT_URL, url.c_str());
// Just connect to the host, do not do any transfers.
curl_easy_setopt(_easy, CURLOPT_CONNECT_ONLY, 1L);
// libcurl won't connect to SSL connections
// with VERIFYPEER enabled because we do not ship
// with a CA bundle in these platforms.
// So let's disable it.
#if defined NINTENDO_SWITCH || defined PSP2
curl_easy_setopt(_easy, CURLOPT_SSL_VERIFYPEER, 0);
#endif
Common::String caCertPath = ConnMan.getCaCertPath();
if (!caCertPath.empty()) {
curl_easy_setopt(_easy, CURLOPT_CAINFO, caCertPath.c_str());
}
CURLcode res = curl_easy_perform(_easy);
if (res != CURLE_OK) {
warning("libcurl: Failed to connect: %s", curl_easy_strerror(res));
return false;
}
// Get the socket, we'll need it for waiting.
// NB: Do not use CURL_AT_LEAST_VERSION(x,y,z) or CURL_VERSION_BITS(x,y,z) for version check
// These were only added around v7.45.0 release so break build with earlier libcurl versions
#if LIBCURL_VERSION_NUM >= 0x072d00 // 7.45.0
// Use new CURLINFO_ACTIVESOCKET API for libcurl v7.45.0 or greater
res = curl_easy_getinfo(_easy, CURLINFO_ACTIVESOCKET, &_socket);
if (res == CURLE_OK) {
return true;
}
#else
// Fallback on old deprecated CURLINFO_LASTSOCKET API for libcurl older than v7.45.0 (October 2015)
long socket;
res = curl_easy_getinfo(_easy, CURLINFO_LASTSOCKET, &socket);
if (res == CURLE_OK) {
// curl_socket_t is an int or a SOCKET (Win32) which is a UINT_PTR
// A cast should be safe enough as long fits in it
_socket = (curl_socket_t)socket;
return true;
}
#endif
warning("libcurl: Failed to extract socket: %s", curl_easy_strerror(res));
return false;
}
return false;
}
size_t CurlSocket::send(const char *data, int len) {
if (!_socket)
return -1;
size_t nsent_total = 0, left = len;
CURLcode res = CURLE_AGAIN;
// Keep looping until the whole thing is sent, errors,
// or times out.
while (((left > 0) && (len > 0))) {
size_t nsent = 0;
uint32 tickCount = g_system->getMillis() + 5000;
while (res == CURLE_AGAIN) {
res = curl_easy_send(_easy, data + nsent_total, left - nsent_total, &nsent);
if (g_system->getMillis() >= tickCount) {
warning("libcurl: Took too long attempting to send data to socket");
return nsent;
}
}
if (res == CURLE_OK) {
nsent_total += nsent;
left -= nsent;
} else if (res != CURLE_AGAIN) {
warning("libcurl: Error when sending to socket: %s", curl_easy_strerror(res));
return nsent_total;
}
}
return nsent_total;
}
size_t CurlSocket::recv(void *data, int maxLen) {
size_t nread = 0;
CURLcode res = CURLE_AGAIN;
uint32 tickCount = g_system->getMillis() + 5000;
while (res == CURLE_AGAIN) {
res = curl_easy_recv(_easy, data, maxLen, &nread);
if (g_system->getMillis() >= tickCount) {
warning("libcurl: Took too long attempting to read data from socket");
return nread;
}
}
if(res != CURLE_OK) {
warning("libcurl Error on receiving data: %s\n", curl_easy_strerror(res));
return nread;
}
debug(3, "libcurl: Received %llu bytes", (unsigned long long)nread);
return nread;
}
} // End of namespace Networking
|
