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
|
// WebSocket server.
// Side thread that gets spawned.
#define WBY_STATIC
#define WBY_IMPLEMENTATION
#define WBY_USE_FIXED_TYPES
#define WBY_USE_ASSERT
#include "mmx/web.h"
#include "common.h"
static struct wby_server server;
static struct wby_con *con = NULL;
static int fill_fd_set_with_ws_sockets(fd_set *read_fds, fd_set *write_fds, fd_set *except_fds) {
// Based on web.h:1936 (start of wby_update)
int max_fd = 0;
FD_SET(server.socket, read_fds);
FD_SET(server.socket, except_fds);
max_fd = WBY_SOCK(server.socket);
if (con == NULL) { return max_fd; }
struct wby_connection *conn = (struct wby_connection *) con;
wby_socket socket = WBY_SOCK(conn->socket);
FD_SET(socket, read_fds);
FD_SET(socket, except_fds);
if (conn->state == WBY_CON_STATE_SEND_CONTINUE) {
FD_SET(socket, write_fds);
}
if (socket > max_fd) { max_fd = socket; }
return max_fd;
}
static void receive_tabfs_request_then_send_to_browser() {
char *request_data = common_receive_tabfs_to_ws(fill_fd_set_with_ws_sockets);
if (request_data == NULL) {
goto done;
}
if (con == NULL) {
common_send_ws_to_tabfs(NULL);
goto done;
}
wby_frame_begin(con, WBY_WSOP_TEXT_FRAME);
wby_write(con, request_data, strlen(request_data));
wby_frame_end(con);
done:
// Was allocated by sender (tabfs.c, send_request_then_await_response).
if (request_data != NULL) { free(request_data); }
return;
}
static int
dispatch(struct wby_con *connection, void *userdata) {
return 1;
}
static int
websocket_connect(struct wby_con *connection, void *userdata) {
/* connection bound userdata */
connection->user_data = NULL;
if (0 == strcmp(connection->request.uri, "/"))
return 0;
return 1;
}
static void
websocket_connected(struct wby_con *connection, void *userdata) {
printf("WebSocket connected\n");
con = connection;
}
#define MAX_DATA_LENGTH 131072
static int
websocket_frame(struct wby_con *connection, const struct wby_frame *frame, void *userdata)
{
// Will be freed at receiver (tabfs.c, send_request_then_await_response).
unsigned char *data = calloc(1, MAX_DATA_LENGTH);
int i = 0;
DEBUG("WebSocket frame incoming\n");
DEBUG(" Frame OpCode: %d\n", frame->opcode);
DEBUG(" Final frame?: %s\n", (frame->flags & WBY_WSF_FIN) ? "yes" : "no");
DEBUG(" Masked? : %s\n", (frame->flags & WBY_WSF_MASKED) ? "yes" : "no");
DEBUG(" Data Length : %d\n", (int) frame->payload_length);
if ((unsigned long) frame->payload_length > MAX_DATA_LENGTH) {
printf("Data too long!\n");
exit(1);
}
while (i < frame->payload_length) {
unsigned char buffer[16];
int remain = frame->payload_length - i;
size_t read_size = remain > (int) sizeof buffer ? sizeof buffer : (size_t) remain;
size_t k;
DEBUG("%08x ", (int) i);
if (0 != wby_read(connection, buffer, read_size))
break;
for (k = 0; k < read_size; ++k)
DEBUG("%02x ", buffer[k]);
for (k = read_size; k < 16; ++k)
DEBUG(" ");
DEBUG(" | ");
for (k = 0; k < read_size; ++k)
DEBUG("%c", isprint(buffer[k]) ? buffer[k] : '?');
DEBUG("\n");
for (k = 0; k < read_size; ++k)
data[i + k] = buffer[k];
i += (int)read_size;
}
if ((int) strlen((const char *) data) != frame->payload_length) {
printf("Null in data! [%s]\n", data);
}
common_send_ws_to_tabfs((char *) data);
return 0;
}
static void websocket_closed(struct wby_con *connection, void *userdata) {
printf("WebSocket closed\n");
if (con == connection) con = NULL;
}
static void test_log(const char* text) {
DEBUG("[debug] %s\n", text);
}
void *websocket_main(void *threadid) {
void *memory = NULL;
wby_size needed_memory = 0;
struct wby_config config;
memset(&config, 0, sizeof config);
config.userdata = NULL;
config.address = "127.0.0.1";
config.port = 8888;
config.connection_max = 4;
config.request_buffer_size = 2048;
config.io_buffer_size = 8192;
config.log = test_log;
config.dispatch = dispatch;
config.ws_connect = websocket_connect;
config.ws_connected = websocket_connected;
config.ws_frame = websocket_frame;
config.ws_closed = websocket_closed;
wby_init(&server, &config, &needed_memory);
memory = calloc(needed_memory, 1);
wby_start(&server, memory);
printf("Awaiting WebSocket connection from Chrome extension.\n");
for (;;) {
receive_tabfs_request_then_send_to_browser();
wby_update(&server); // We receive stuff from the browser here.
}
wby_stop(&server);
free(memory);
#if defined(_WIN32)
WSACleanup();
#endif
return 0;
}
|
