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1 | package PVE::APIClient::Commands::lxc; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use JSON; | |
6 | use URI::Escape; | |
7 | use IO::Select; | |
8 | use IO::Socket::SSL; | |
9 | use MIME::Base64; | |
10 | use Digest::SHA; | |
11 | use HTTP::Response; | |
12 | ||
13 | use PVE::Tools; | |
14 | use PVE::JSONSchema qw(get_standard_option); | |
15 | use PVE::CLIHandler; | |
16 | use PVE::PTY; | |
17 | ||
18 | use base qw(PVE::CLIHandler); | |
19 | use PVE::APIClient::Config; | |
20 | ||
21 | my $CRLF = "\x0D\x0A"; | |
22 | my $max_payload_size = 65536; | |
23 | ||
24 | my $build_web_socket_request = sub { | |
25 | my ($host, $path, $ticket, $termproxy) = @_; | |
26 | ||
27 | my $key = ''; | |
28 | $key .= chr(int(rand(256))) for 1 .. 16; | |
29 | my $enckey = MIME::Base64::encode_base64($key, ''); | |
30 | ||
31 | my $encticket = uri_escape($ticket); | |
32 | my $cookie = "PVEAuthCookie=$encticket; path=/; secure;"; | |
33 | ||
34 | $path .= "?port=$termproxy->{port}" . | |
35 | "&vncticket=" . uri_escape($termproxy->{ticket}); | |
36 | ||
37 | my $request = "GET $path HTTP/1.1$CRLF" | |
38 | . "Upgrade: WebSocket$CRLF" | |
39 | . "Connection: Upgrade$CRLF" | |
40 | . "Host: $host$CRLF" | |
41 | . "Sec-WebSocket-Key: $enckey$CRLF" | |
42 | . "Sec-WebSocket-Version: 13$CRLF" | |
43 | . "Sec-WebSocket-Protocol: binary$CRLF" | |
44 | . "Cookie: $cookie$CRLF" | |
45 | . "$CRLF"; | |
46 | ||
47 | return ($request, $enckey); | |
48 | }; | |
49 | ||
50 | my $create_websockt_frame = sub { | |
51 | my ($payload) = @_; | |
52 | ||
53 | my $string = "\x82"; # binary frame | |
54 | my $payload_len = length($payload); | |
55 | if ($payload_len <= 125) { | |
56 | $string .= pack 'C', $payload_len | 128; | |
57 | } elsif ($payload_len <= 0xffff) { | |
58 | $string .= pack 'C', 126 | 128; | |
59 | $string .= pack 'n', $payload_len; | |
60 | } else { | |
61 | $string .= pack 'C', 127 | 128; | |
62 | $string .= pack 'Q>', $payload_len; | |
63 | } | |
64 | ||
65 | $string .= pack 'N', 0; # we simply use 0 as mask | |
66 | $string .= $payload; | |
67 | ||
68 | return $string; | |
69 | }; | |
70 | ||
71 | my $parse_web_socket_frame = sub { | |
72 | my ($wsbuf_ref) = @_; | |
73 | ||
74 | my $wsbuf = $$wsbuf_ref; | |
75 | ||
76 | my $payload; | |
77 | my $req_close = 0; | |
78 | ||
79 | while (my $len = length($wsbuf)) { | |
80 | last if $len < 2; | |
81 | ||
82 | my $hdr = unpack('C', substr($wsbuf, 0, 1)); | |
83 | my $opcode = $hdr & 0b00001111; | |
84 | my $fin = $hdr & 0b10000000; | |
85 | ||
86 | die "received fragmented websocket frame\n" if !$fin; | |
87 | ||
88 | my $rsv = $hdr & 0b01110000; | |
89 | die "received websocket frame with RSV flags\n" if $rsv; | |
90 | ||
91 | my $payload_len = unpack 'C', substr($wsbuf, 1, 1); | |
92 | ||
93 | my $masked = $payload_len & 0b10000000; | |
94 | die "received masked websocket frame from server\n" if $masked; | |
95 | ||
96 | my $offset = 2; | |
97 | $payload_len = $payload_len & 0b01111111; | |
98 | if ($payload_len == 126) { | |
99 | last if $len < 4; | |
100 | $payload_len = unpack('n', substr($wsbuf, $offset, 2)); | |
101 | $offset += 2; | |
102 | } elsif ($payload_len == 127) { | |
103 | last if $len < 10; | |
104 | $payload_len = unpack('Q>', substr($wsbuf, $offset, 8)); | |
105 | $offset += 8; | |
106 | } | |
107 | ||
108 | die "received too large websocket frame (len = $payload_len)\n" | |
109 | if ($payload_len > $max_payload_size) || ($payload_len < 0); | |
110 | ||
111 | last if $len < ($offset + $payload_len); | |
112 | ||
113 | my $data = substr($wsbuf, 0, $offset + $payload_len, ''); # now consume data | |
114 | ||
115 | my $frame_data = substr($data, $offset, $payload_len); | |
116 | ||
117 | $payload = '' if !defined($payload); | |
118 | $payload .= $frame_data; | |
119 | ||
120 | if ($opcode == 1 || $opcode == 2) { | |
121 | # continue | |
122 | } elsif ($opcode == 8) { | |
123 | my $statuscode = unpack ("n", $frame_data); | |
124 | $req_close = 1; | |
125 | } else { | |
126 | die "received unhandled websocket opcode $opcode\n"; | |
127 | } | |
128 | } | |
129 | ||
130 | return ($payload, $req_close); | |
131 | }; | |
132 | ||
133 | my $client_exit = sub { | |
134 | my ($select, $web_socket, $old_termios) = @_; | |
135 | ||
136 | foreach my $fh ($select->handles) { | |
137 | $select->remove($fh); | |
138 | ||
139 | if ($fh == $web_socket) { | |
140 | if ($fh->connected) { | |
141 | ||
142 | # close connection | |
143 | # Opcode, mask, statuscode | |
144 | my $msg = "\x88" . pack('N', 0) . pack('n', 0); | |
145 | $fh->syswrite($msg); | |
146 | close($fh); | |
147 | } | |
148 | } | |
149 | ||
150 | } | |
151 | ||
152 | # switch back to blocking mode (else later shell commands will fail). | |
153 | STDIN->blocking(0); | |
154 | ||
155 | # | |
156 | # Reset the terminal parameters. | |
157 | # | |
158 | print "\e[24H\r\n"; | |
159 | PVE::PTY::tcsetattr(*STDIN, $old_termios); | |
160 | }; | |
161 | ||
162 | __PACKAGE__->register_method ({ | |
163 | name => 'enter', | |
164 | path => 'enter', | |
165 | method => 'POST', | |
166 | description => "Enter container console.", | |
167 | parameters => { | |
168 | additionalProperties => 0, | |
169 | properties => { | |
170 | remote => get_standard_option('pveclient-remote-name'), | |
171 | vmid => { | |
172 | description => "The container ID", | |
173 | type => 'string', | |
174 | }, | |
175 | }, | |
176 | }, | |
177 | returns => { type => 'null'}, | |
178 | code => sub { | |
179 | my ($param) = @_; | |
180 | ||
181 | my $config = PVE::APIClient::Config->load(); | |
182 | my $conn = PVE::APIClient::Config->remote_conn($config, $param->{remote}); | |
183 | ||
184 | # Get the real node from the resources endpoint | |
185 | my $resource_list = $conn->get("api2/json/cluster/resources", { type => 'vm'}); | |
186 | my ($resource) = grep { $_->{type} eq "lxc" && $_->{vmid} eq $param->{vmid}} @$resource_list; | |
187 | ||
188 | die "container '$param->{vmid}' does not exist\n" | |
189 | if !(defined($resource) && defined($resource->{node})); | |
190 | ||
191 | my $node = $resource->{node}; | |
192 | ||
193 | my $api_path = "api2/json/nodes/$node/lxc/$param->{vmid}"; | |
194 | ||
195 | my $termproxy = $conn->post("${api_path}/termproxy", {}); | |
196 | ||
197 | my $web_socket = IO::Socket::SSL->new( | |
198 | PeerHost => $conn->{host}, | |
199 | PeerPort => $conn->{port}, | |
200 | SSL_verify_mode => SSL_VERIFY_NONE, # fixme: ??? | |
201 | timeout => 30) || | |
202 | die "failed to connect: $!\n"; | |
203 | ||
204 | # WebSocket Handshake | |
205 | ||
206 | my ($request, $wskey) = $build_web_socket_request->( | |
207 | $conn->{host}, "/$api_path/vncwebsocket", $conn->{ticket}, $termproxy); | |
208 | ||
209 | $web_socket->syswrite($request); | |
210 | ||
211 | my $wsbuf = ''; | |
212 | ||
213 | my $wb_socket_read_available_bytes = sub { | |
214 | my $nr = $web_socket->sysread($wsbuf, $max_payload_size, length($wsbuf)); | |
215 | die "web socket read error - $!\n" if $nr < 0; | |
216 | return $nr; | |
217 | }; | |
218 | ||
219 | my $raw_response = ''; | |
220 | ||
221 | while(1) { | |
222 | my $nr = $wb_socket_read_available_bytes->(); | |
223 | if ($wsbuf =~ s/^(.*?)$CRLF$CRLF//s) { | |
224 | $raw_response = $1; | |
225 | last; | |
226 | } | |
227 | last if !$nr; | |
228 | }; | |
229 | ||
230 | # Note: we keep any remaining data in $wsbuf | |
231 | ||
232 | my $response = HTTP::Response->parse($raw_response); | |
233 | ||
234 | # Note: Digest::SHA::sha1_base64 has wrong padding | |
235 | my $wsaccept = Digest::SHA::sha1_base64("${wskey}258EAFA5-E914-47DA-95CA-C5AB0DC85B11") . "="; | |
236 | ||
237 | die "got invalid websocket reponse: $raw_response\n" | |
238 | if !(($response->code == 101) && | |
239 | (lc $response->header('connection') eq 'upgrade') && | |
240 | (lc $response->header('upgrade') eq 'websocket') && | |
241 | ($response->header('sec-websocket-protocol') eq 'binary') && | |
242 | ($response->header('sec-websocket-accept') eq $wsaccept)); | |
243 | ||
244 | # send auth again... | |
245 | my $frame = $create_websockt_frame->($termproxy->{user} . ":" . $termproxy->{ticket} . "\n"); | |
246 | $web_socket->syswrite($frame); | |
247 | ||
248 | # Send resize command | |
249 | my ($columns, $rows) = PVE::PTY::tcgetsize(*STDIN); | |
250 | $frame = $create_websockt_frame->("1:$columns:$rows:"); | |
251 | $web_socket->syswrite($frame); | |
252 | ||
253 | # Set STDIN to "raw -echo" mode | |
254 | my $old_termios = PVE::PTY::tcgetattr(*STDIN); | |
255 | my $raw_termios = {%$old_termios}; | |
256 | PVE::PTY::cfmakeraw($raw_termios); | |
257 | PVE::PTY::tcsetattr(*STDIN, $raw_termios); | |
258 | ||
259 | # And set it to non-blocking so we can every char with IO::Select. | |
260 | STDIN->blocking(0); | |
261 | ||
262 | my $select = IO::Select->new; | |
263 | ||
264 | $web_socket->blocking(0); | |
265 | $select->add($web_socket); | |
266 | $select->add(fileno(STDIN)); | |
267 | ||
268 | my @messages; | |
269 | my $ctrl_a_pressed_before = 0; | |
270 | my $next_ping = time() + 3; | |
271 | ||
272 | eval { | |
273 | while (1) { | |
274 | # Ping server every 3 seconds. | |
275 | my $now = time(); | |
276 | if ($now >= $next_ping) { | |
277 | push(@messages, $create_websockt_frame->("2")); | |
278 | $next_ping = $now + 3; | |
279 | } | |
280 | ||
281 | # Write | |
282 | foreach my $fh ($select->can_write(0.5)) { | |
283 | if ($fh == $web_socket and my $msg = shift @messages) { | |
284 | $fh->syswrite($msg, length($msg)); | |
285 | } | |
286 | } | |
287 | ||
288 | # Read | |
289 | foreach my $fh ($select->can_read(0.5)) { | |
290 | ||
291 | # From Web Socket | |
292 | if ($fh == $web_socket) { | |
293 | # Read from WebSocket | |
294 | my $nr = $wb_socket_read_available_bytes->(); | |
295 | my ($payload, $req_close) = $parse_web_socket_frame->(\$wsbuf); | |
296 | ||
297 | if ($payload ne "OK") { | |
298 | syswrite(\*STDOUT, $payload, length($payload)); | |
299 | } | |
300 | } | |
301 | ||
302 | # From STDIN | |
303 | elsif ($fh == fileno(STDIN)) { | |
304 | ||
305 | # Read from STDIN | |
306 | my $nr = read(\*STDIN, my $buff, 4096); | |
307 | if (!$nr) { | |
308 | next; | |
309 | } | |
310 | ||
311 | my $char = ord($buff); | |
312 | ||
313 | if ($ctrl_a_pressed_before == 1 && $char == hex("0x71")) { | |
314 | $client_exit->($select, $web_socket, $old_termios); | |
315 | return; | |
316 | } | |
317 | ||
318 | if ($char == hex("0x01")) { | |
319 | if ($ctrl_a_pressed_before == 0) { | |
320 | $ctrl_a_pressed_before = 1; | |
321 | } | |
322 | } | |
323 | else { | |
324 | $ctrl_a_pressed_before = 0; | |
325 | } | |
326 | ||
327 | push(@messages, $create_websockt_frame->("0:" . $nr . ":" . $buff)); | |
328 | } | |
329 | } | |
330 | } | |
331 | }; | |
332 | print "ERROR: " . $@ . ".\n" if $@; | |
333 | ||
334 | $client_exit->($select, $web_socket, $old_termios); | |
335 | ||
336 | return undef | |
337 | }}); | |
338 | ||
339 | __PACKAGE__->register_method ({ | |
340 | name => 'list', | |
341 | path => 'list', | |
342 | method => 'GET', | |
343 | description => "List containers.", | |
344 | parameters => { | |
345 | additionalProperties => 0, | |
346 | properties => { | |
347 | remote => get_standard_option('pveclient-remote-name'), | |
348 | }, | |
349 | }, | |
350 | returns => { type => 'null'}, | |
351 | code => sub { | |
352 | my ($param) = @_; | |
353 | ||
354 | die "implement me"; | |
355 | ||
356 | }}); | |
357 | ||
358 | ||
359 | our $cmddef = { | |
360 | enter => [ __PACKAGE__, 'enter', ['remote', 'vmid']], | |
361 | list => [ __PACKAGE__, 'list', ['remote']], | |
362 | }; | |
363 | ||
364 | 1; |