izzy/xemu
0
0
Fork 0
mirror of https://github.com/izzy2lost/xemu.git synced 2026-07-06 00:20:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'remotes/berrange/tags/pull-io-channel-vnc-2015-12-18-1' into staging

Browse Source 
Merge VNC conversion to I/O channels

# gpg: Signature made Fri 18 Dec 2015 15:44:30 GMT using RSA key ID 15104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>"
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>"

* remotes/berrange/tags/pull-io-channel-vnc-2015-12-18-1:
  ui: convert VNC server to use QIOChannelWebsock
  ui: convert VNC server to use QIOChannelTLS
  ui: convert VNC server to use QIOChannelSocket

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
2015-12-18 16:04:31 +00:00
parent 6126bc5522 d5f042232c
commit b06f904f2e
7 changed files with 452 additions and 836 deletions
Download Patch File Download Diff File Expand all files Collapse all files
ui/vnc-auth-sasl.c
+45 -12
View File
@@ -62,7 +62,7 @@ long vnc_client_write_sasl(VncState *vs)
(const char **)&vs->sasl.encoded,
&vs->sasl.encodedLength);
if (err != SASL_OK)
return vnc_client_io_error(vs, -1, EIO);
return vnc_client_io_error(vs, -1, NULL);
vs->sasl.encodedOffset = 0;
}
@@ -86,7 +86,11 @@ long vnc_client_write_sasl(VncState *vs)
* SASL encoded output
*/
if (vs->output.offset == 0) {
qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
if (vs->ioc_tag) {
g_source_remove(vs->ioc_tag);
}
vs->ioc_tag = qio_channel_add_watch(
vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
}
return ret;
@@ -110,7 +114,7 @@ long vnc_client_read_sasl(VncState *vs)
&decoded, &decodedLen);
if (err != SASL_OK)
return vnc_client_io_error(vs, -1, -EIO);
return vnc_client_io_error(vs, -1, NULL);
VNC_DEBUG("Read SASL Encoded %p size %ld Decoded %p size %d\n",
encoded, ret, decoded, decodedLen);
buffer_reserve(&vs->input, decodedLen);
@@ -255,17 +259,17 @@ static int protocol_client_auth_sasl_step(VncState *vs, uint8_t *data, size_t le
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
} else {
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
VNC_DEBUG("Authentication rejected for weak SSF %p\n", vs->ioc);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
VNC_DEBUG("Authentication rejected for ACL %p\n", vs->ioc);
goto authreject;
}
VNC_DEBUG("Authentication successful %d\n", vs->csock);
VNC_DEBUG("Authentication successful %p\n", vs->ioc);
vnc_write_u32(vs, 0); /* Accept auth */
/*
* Delay writing in SSF encoded mode until pending output
@@ -383,17 +387,17 @@ static int protocol_client_auth_sasl_start(VncState *vs, uint8_t *data, size_t l
vnc_read_when(vs, protocol_client_auth_sasl_step_len, 4);
} else {
if (!vnc_auth_sasl_check_ssf(vs)) {
VNC_DEBUG("Authentication rejected for weak SSF %d\n", vs->csock);
VNC_DEBUG("Authentication rejected for weak SSF %p\n", vs->ioc);
goto authreject;
}
/* Check username whitelist ACL */
if (vnc_auth_sasl_check_access(vs) < 0) {
VNC_DEBUG("Authentication rejected for ACL %d\n", vs->csock);
VNC_DEBUG("Authentication rejected for ACL %p\n", vs->ioc);
goto authreject;
}
VNC_DEBUG("Authentication successful %d\n", vs->csock);
VNC_DEBUG("Authentication successful %p\n", vs->ioc);
vnc_write_u32(vs, 0); /* Accept auth */
start_client_init(vs);
}
@@ -487,6 +491,32 @@ static int protocol_client_auth_sasl_mechname_len(VncState *vs, uint8_t *data, s
return 0;
}
static char *
vnc_socket_ip_addr_string(QIOChannelSocket *ioc,
bool local,
Error **errp)
{
SocketAddress *addr;
char *ret;
if (local) {
addr = qio_channel_socket_get_local_address(ioc, errp);
} else {
addr = qio_channel_socket_get_remote_address(ioc, errp);
}
if (!addr) {
return NULL;
}
if (addr->type != SOCKET_ADDRESS_KIND_INET) {
error_setg(errp, "Not an inet socket type");
return NULL;
}
ret = g_strdup_printf("%s;%s", addr->u.inet->host, addr->u.inet->port);
qapi_free_SocketAddress(addr);
return ret;
}
void start_auth_sasl(VncState *vs)
{
const char *mechlist = NULL;
@@ -495,13 +525,16 @@ void start_auth_sasl(VncState *vs)
char *localAddr, *remoteAddr;
int mechlistlen;
VNC_DEBUG("Initialize SASL auth %d\n", vs->csock);
VNC_DEBUG("Initialize SASL auth %p\n", vs->ioc);
/* Get local & remote client addresses in form IPADDR;PORT */
if (!(localAddr = vnc_socket_local_addr("%s;%s", vs->csock)))
localAddr = vnc_socket_ip_addr_string(vs->sioc, true, NULL);
if (!localAddr) {
goto authabort;
}
if (!(remoteAddr = vnc_socket_remote_addr("%s;%s", vs->csock))) {
remoteAddr = vnc_socket_ip_addr_string(vs->sioc, false, NULL);
if (!remoteAddr) {
g_free(localAddr);
goto authabort;
}
ui/vnc-auth-vencrypt.c
+32 -61
View File
@@ -63,54 +63,21 @@ static void start_auth_vencrypt_subauth(VncState *vs)
}
}
static void vnc_tls_handshake_io(void *opaque);
static int vnc_start_vencrypt_handshake(VncState *vs)
static void vnc_tls_handshake_done(Object *source,
Error *err,
gpointer user_data)
{
Error *err = NULL;
if (qcrypto_tls_session_handshake(vs->tls, &err) < 0) {
goto error;
}
switch (qcrypto_tls_session_get_handshake_status(vs->tls)) {
case QCRYPTO_TLS_HANDSHAKE_COMPLETE:
VNC_DEBUG("Handshake done, checking credentials\n");
if (qcrypto_tls_session_check_credentials(vs->tls, &err) < 0) {
goto error;
}
VNC_DEBUG("Client verification passed, starting TLS I/O\n");
qemu_set_fd_handler(vs->csock, vnc_client_read, vnc_client_write, vs);
VncState *vs = user_data;
if (err) {
VNC_DEBUG("Handshake failed %s\n",
error_get_pretty(err));
vnc_client_error(vs);
} else {
vs->ioc_tag = qio_channel_add_watch(
vs->ioc, G_IO_IN | G_IO_OUT, vnc_client_io, vs, NULL);
start_auth_vencrypt_subauth(vs);
break;
case QCRYPTO_TLS_HANDSHAKE_RECVING:
VNC_DEBUG("Handshake interrupted (blocking read)\n");
qemu_set_fd_handler(vs->csock, vnc_tls_handshake_io, NULL, vs);
break;
case QCRYPTO_TLS_HANDSHAKE_SENDING:
VNC_DEBUG("Handshake interrupted (blocking write)\n");
qemu_set_fd_handler(vs->csock, NULL, vnc_tls_handshake_io, vs);
break;
}
return 0;
error:
VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
error_free(err);
vnc_client_error(vs);
return -1;
}
static void vnc_tls_handshake_io(void *opaque)
{
VncState *vs = (VncState *)opaque;
VNC_DEBUG("Handshake IO continue\n");
vnc_start_vencrypt_handshake(vs);
}
@@ -125,33 +92,37 @@ static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len
vnc_client_error(vs);
} else {
Error *err = NULL;
QIOChannelTLS *tls;
VNC_DEBUG("Accepting auth %d, setting up TLS for handshake\n", auth);
vnc_write_u8(vs, 1); /* Accept auth */
vnc_flush(vs);
vs->tls = qcrypto_tls_session_new(vs->vd->tlscreds,
NULL,
vs->vd->tlsaclname,
QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
&err);
if (!vs->tls) {
VNC_DEBUG("Failed to setup TLS %s\n",
error_get_pretty(err));
if (vs->ioc_tag) {
g_source_remove(vs->ioc_tag);
vs->ioc_tag = 0;
}
tls = qio_channel_tls_new_server(
vs->ioc,
vs->vd->tlscreds,
vs->vd->tlsaclname,
&err);
if (!tls) {
VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
error_free(err);
vnc_client_error(vs);
return 0;
}
qcrypto_tls_session_set_callbacks(vs->tls,
vnc_tls_push,
vnc_tls_pull,
vs);
VNC_DEBUG("Start TLS VeNCrypt handshake process\n");
if (vnc_start_vencrypt_handshake(vs) < 0) {
VNC_DEBUG("Failed to start TLS handshake\n");
return 0;
}
object_unref(OBJECT(vs->ioc));
vs->ioc = QIO_CHANNEL(tls);
vs->tls = qio_channel_tls_get_session(tls);
qio_channel_tls_handshake(tls,
vnc_tls_handshake_done,
vs,
NULL);
}
return 0;
}
ui/vnc-jobs.c
+12 -8
View File
@@ -166,13 +166,16 @@ void vnc_jobs_consume_buffer(VncState *vs)
vnc_lock_output(vs);
if (vs->jobs_buffer.offset) {
if (vs->csock != -1 && buffer_empty(&vs->output)) {
qemu_set_fd_handler(vs->csock, vnc_client_read,
vnc_client_write, vs);
if (vs->ioc != NULL && buffer_empty(&vs->output)) {
if (vs->ioc_tag) {
g_source_remove(vs->ioc_tag);
}
vs->ioc_tag = qio_channel_add_watch(
vs->ioc, G_IO_IN | G_IO_OUT, vnc_client_io, vs, NULL);
}
buffer_move(&vs->output, &vs->jobs_buffer);
}
flush = vs->csock != -1 && vs->abort != true;
flush = vs->ioc != NULL && vs->abort != true;
vnc_unlock_output(vs);
if (flush) {
@@ -186,7 +189,8 @@ void vnc_jobs_consume_buffer(VncState *vs)
static void vnc_async_encoding_start(VncState *orig, VncState *local)
{
buffer_init(&local->output, "vnc-worker-output");
local->csock = -1; /* Don't do any network work on this thread */
local->sioc = NULL; /* Don't do any network work on this thread */
local->ioc = NULL; /* Don't do any network work on this thread */
local->vnc_encoding = orig->vnc_encoding;
local->features = orig->features;
@@ -231,7 +235,7 @@ static int vnc_worker_thread_loop(VncJobQueue *queue)
}
vnc_lock_output(job->vs);
if (job->vs->csock == -1 || job->vs->abort == true) {
if (job->vs->ioc == NULL || job->vs->abort == true) {
vnc_unlock_output(job->vs);
goto disconnected;
}
@@ -259,7 +263,7 @@ static int vnc_worker_thread_loop(VncJobQueue *queue)
QLIST_FOREACH_SAFE(entry, &job->rectangles, next, tmp) {
int n;
if (job->vs->csock == -1) {
if (job->vs->ioc == NULL) {
vnc_unlock_display(job->vs->vd);
/* Copy persistent encoding data */
vnc_async_encoding_end(job->vs, &vs);
@@ -281,7 +285,7 @@ static int vnc_worker_thread_loop(VncJobQueue *queue)
vs.output.buffer[saved_offset + 1] = n_rectangles & 0xFF;
vnc_lock_output(job->vs);
if (job->vs->csock != -1) {
if (job->vs->ioc != NULL) {
buffer_move(&job->vs->jobs_buffer, &vs.output);
/* Copy persistent encoding data */
vnc_async_encoding_end(job->vs, &vs);
ui/vnc-ws.c
+68 -336
View File
@@ -19,373 +19,105 @@
*/
#include "vnc.h"
#include "qemu/main-loop.h"
#include "crypto/hash.h"
#include "io/channel-websock.h"
static int vncws_start_tls_handshake(VncState *vs)
static void vncws_tls_handshake_done(Object *source,
Error *err,
gpointer user_data)
{
Error *err = NULL;
VncState *vs = user_data;
if (qcrypto_tls_session_handshake(vs->tls, &err) < 0) {
goto error;
}
switch (qcrypto_tls_session_get_handshake_status(vs->tls)) {
case QCRYPTO_TLS_HANDSHAKE_COMPLETE:
VNC_DEBUG("Handshake done, checking credentials\n");
if (qcrypto_tls_session_check_credentials(vs->tls, &err) < 0) {
goto error;
}
VNC_DEBUG("Client verification passed, starting TLS I/O\n");
qemu_set_fd_handler(vs->csock, vncws_handshake_read, NULL, vs);
break;
case QCRYPTO_TLS_HANDSHAKE_RECVING:
VNC_DEBUG("Handshake interrupted (blocking read)\n");
qemu_set_fd_handler(vs->csock, vncws_tls_handshake_io, NULL, vs);
break;
case QCRYPTO_TLS_HANDSHAKE_SENDING:
VNC_DEBUG("Handshake interrupted (blocking write)\n");
qemu_set_fd_handler(vs->csock, NULL, vncws_tls_handshake_io, vs);
break;
}
return 0;
error:
VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
error_free(err);
vnc_client_error(vs);
return -1;
}
void vncws_tls_handshake_io(void *opaque)
{
VncState *vs = (VncState *)opaque;
Error *err = NULL;
vs->tls = qcrypto_tls_session_new(vs->vd->tlscreds,
NULL,
vs->vd->tlsaclname,
QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
&err);
if (!vs->tls) {
VNC_DEBUG("Failed to setup TLS %s\n",
error_get_pretty(err));
error_free(err);
if (err) {
VNC_DEBUG("Handshake failed %s\n", error_get_pretty(err));
vnc_client_error(vs);
return;
} else {
VNC_DEBUG("TLS handshake complete, starting websocket handshake\n");
vs->ioc_tag = qio_channel_add_watch(
QIO_CHANNEL(vs->ioc), G_IO_IN, vncws_handshake_io, vs, NULL);
}
qcrypto_tls_session_set_callbacks(vs->tls,
vnc_tls_push,
vnc_tls_pull,
vs);
VNC_DEBUG("Start TLS WS handshake process\n");
vncws_start_tls_handshake(vs);
}
void vncws_handshake_read(void *opaque)
gboolean vncws_tls_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
GIOCondition condition G_GNUC_UNUSED,
void *opaque)
{
VncState *vs = opaque;
uint8_t *handshake_end;
long ret;
/* Typical HTTP headers from novnc are 512 bytes, so limiting
* total header size to 4096 is easily enough. */
size_t want = 4096 - vs->ws_input.offset;
buffer_reserve(&vs->ws_input, want);
ret = vnc_client_read_buf(vs, buffer_end(&vs->ws_input), want);
if (!ret) {
if (vs->csock == -1) {
vnc_disconnect_finish(vs);
}
return;
}
vs->ws_input.offset += ret;
handshake_end = (uint8_t *)g_strstr_len((char *)vs->ws_input.buffer,
vs->ws_input.offset, WS_HANDSHAKE_END);
if (handshake_end) {
qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
vncws_process_handshake(vs, vs->ws_input.buffer, vs->ws_input.offset);
buffer_advance(&vs->ws_input, handshake_end - vs->ws_input.buffer +
strlen(WS_HANDSHAKE_END));
} else if (vs->ws_input.offset >= 4096) {
VNC_DEBUG("End of headers not found in first 4096 bytes\n");
vnc_client_error(vs);
}
}
long vnc_client_read_ws(VncState *vs)
{
int ret, err;
uint8_t *payload;
size_t payload_size, header_size;
VNC_DEBUG("Read websocket %p size %zd offset %zd\n", vs->ws_input.buffer,
vs->ws_input.capacity, vs->ws_input.offset);
buffer_reserve(&vs->ws_input, 4096);
ret = vnc_client_read_buf(vs, buffer_end(&vs->ws_input), 4096);
if (!ret) {
return 0;
}
vs->ws_input.offset += ret;
ret = 0;
/* consume as much of ws_input buffer as possible */
do {
if (vs->ws_payload_remain == 0) {
err = vncws_decode_frame_header(&vs->ws_input,
&header_size,
&vs->ws_payload_remain,
&vs->ws_payload_mask);
if (err <= 0) {
return err;
}
buffer_advance(&vs->ws_input, header_size);
}
if (vs->ws_payload_remain != 0) {
err = vncws_decode_frame_payload(&vs->ws_input,
&vs->ws_payload_remain,
&vs->ws_payload_mask,
&payload,
&payload_size);
if (err < 0) {
return err;
}
if (err == 0) {
return ret;
}
ret += err;
buffer_reserve(&vs->input, payload_size);
buffer_append(&vs->input, payload, payload_size);
buffer_advance(&vs->ws_input, payload_size);
}
} while (vs->ws_input.offset > 0);
return ret;
}
long vnc_client_write_ws(VncState *vs)
{
long ret;
VNC_DEBUG("Write WS: Pending output %p size %zd offset %zd\n",
vs->output.buffer, vs->output.capacity, vs->output.offset);
vncws_encode_frame(&vs->ws_output, vs->output.buffer, vs->output.offset);
buffer_reset(&vs->output);
ret = vnc_client_write_buf(vs, vs->ws_output.buffer, vs->ws_output.offset);
if (!ret) {
return 0;
}
buffer_advance(&vs->ws_output, ret);
if (vs->ws_output.offset == 0) {
qemu_set_fd_handler(vs->csock, vnc_client_read, NULL, vs);
}
return ret;
}
static char *vncws_extract_handshake_entry(const char *handshake,
size_t handshake_len, const char *name)
{
char *begin, *end, *ret = NULL;
char *line = g_strdup_printf("%s%s: ", WS_HANDSHAKE_DELIM, name);
begin = g_strstr_len(handshake, handshake_len, line);
if (begin != NULL) {
begin += strlen(line);
end = g_strstr_len(begin, handshake_len - (begin - handshake),
WS_HANDSHAKE_DELIM);
if (end != NULL) {
ret = g_strndup(begin, end - begin);
}
}
g_free(line);
return ret;
}
static void vncws_send_handshake_response(VncState *vs, const char* key)
{
char combined_key[WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1];
char *accept = NULL, *response = NULL;
QIOChannelTLS *tls;
Error *err = NULL;
g_strlcpy(combined_key, key, WS_CLIENT_KEY_LEN + 1);
g_strlcat(combined_key, WS_GUID, WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1);
VNC_DEBUG("TLS Websocket connection required\n");
if (vs->ioc_tag) {
g_source_remove(vs->ioc_tag);
vs->ioc_tag = 0;
}
/* hash and encode it */
if (qcrypto_hash_base64(QCRYPTO_HASH_ALG_SHA1,
combined_key,
WS_CLIENT_KEY_LEN + WS_GUID_LEN,
&accept,
&err) < 0) {
VNC_DEBUG("Hashing Websocket combined key failed %s\n",
error_get_pretty(err));
tls = qio_channel_tls_new_server(
vs->ioc,
vs->vd->tlscreds,
vs->vd->tlsaclname,
&err);
if (!tls) {
VNC_DEBUG("Failed to setup TLS %s\n", error_get_pretty(err));
error_free(err);
vnc_client_error(vs);
return;
return TRUE;
}
response = g_strdup_printf(WS_HANDSHAKE, accept);
vnc_client_write_buf(vs, (const uint8_t *)response, strlen(response));
VNC_DEBUG("Start TLS WS handshake process\n");
object_unref(OBJECT(vs->ioc));
vs->ioc = QIO_CHANNEL(tls);
vs->tls = qio_channel_tls_get_session(tls);
g_free(accept);
g_free(response);
qio_channel_tls_handshake(tls,
vncws_tls_handshake_done,
vs,
NULL);
vs->encode_ws = 1;
vnc_init_state(vs);
return TRUE;
}
void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size)
{
char *protocols = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Protocol");
char *version = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Version");
char *key = vncws_extract_handshake_entry((const char *)line, size,
"Sec-WebSocket-Key");
if (protocols && version && key
&& g_strrstr(protocols, "binary")
&& !strcmp(version, WS_SUPPORTED_VERSION)
&& strlen(key) == WS_CLIENT_KEY_LEN) {
vncws_send_handshake_response(vs, key);
} else {
VNC_DEBUG("Defective Websockets header or unsupported protocol\n");
static void vncws_handshake_done(Object *source,
Error *err,
gpointer user_data)
{
VncState *vs = user_data;
if (err) {
VNC_DEBUG("Websock handshake failed %s\n", error_get_pretty(err));
vnc_client_error(vs);
}
g_free(protocols);
g_free(version);
g_free(key);
}
void vncws_encode_frame(Buffer *output, const void *payload,
const size_t payload_size)
{
size_t header_size = 0;
unsigned char opcode = WS_OPCODE_BINARY_FRAME;
union {
char buf[WS_HEAD_MAX_LEN];
WsHeader ws;
} header;
if (!payload_size) {
return;
}
header.ws.b0 = 0x80 | (opcode & 0x0f);
if (payload_size <= 125) {
header.ws.b1 = (uint8_t)payload_size;
header_size = 2;
} else if (payload_size < 65536) {
header.ws.b1 = 0x7e;
header.ws.u.s16.l16 = cpu_to_be16((uint16_t)payload_size);
header_size = 4;
} else {
header.ws.b1 = 0x7f;
header.ws.u.s64.l64 = cpu_to_be64(payload_size);
header_size = 10;
VNC_DEBUG("Websock handshake complete, starting VNC protocol\n");
vnc_init_state(vs);
vs->ioc_tag = qio_channel_add_watch(
vs->ioc, G_IO_IN, vnc_client_io, vs, NULL);
}
buffer_reserve(output, header_size + payload_size);
buffer_append(output, header.buf, header_size);
buffer_append(output, payload, payload_size);
}
int vncws_decode_frame_header(Buffer *input,
size_t *header_size,
size_t *payload_remain,
WsMask *payload_mask)
gboolean vncws_handshake_io(QIOChannel *ioc G_GNUC_UNUSED,
GIOCondition condition G_GNUC_UNUSED,
void *opaque)
{
unsigned char opcode = 0, fin = 0, has_mask = 0;
size_t payload_len;
WsHeader *header = (WsHeader *)input->buffer;
VncState *vs = opaque;
QIOChannelWebsock *wioc;
if (input->offset < WS_HEAD_MIN_LEN + 4) {
/* header not complete */
return 0;
VNC_DEBUG("Websocket negotiate starting\n");
if (vs->ioc_tag) {
g_source_remove(vs->ioc_tag);
vs->ioc_tag = 0;
}
fin = (header->b0 & 0x80) >> 7;
opcode = header->b0 & 0x0f;
has_mask = (header->b1 & 0x80) >> 7;
payload_len = header->b1 & 0x7f;
wioc = qio_channel_websock_new_server(vs->ioc);
if (opcode == WS_OPCODE_CLOSE) {
/* disconnect */
return -1;
}
object_unref(OBJECT(vs->ioc));
vs->ioc = QIO_CHANNEL(wioc);
/* Websocket frame sanity check:
* * Websocket fragmentation is not supported.
* * All websockets frames sent by a client have to be masked.
* * Only binary encoding is supported.
*/
if (!fin || !has_mask || opcode != WS_OPCODE_BINARY_FRAME) {
VNC_DEBUG("Received faulty/unsupported Websocket frame\n");
return -2;
}
qio_channel_websock_handshake(wioc,
vncws_handshake_done,
vs,
NULL);
if (payload_len < 126) {
*payload_remain = payload_len;
*header_size = 6;
*payload_mask = header->u.m;
} else if (payload_len == 126 && input->offset >= 8) {
*payload_remain = be16_to_cpu(header->u.s16.l16);
*header_size = 8;
*payload_mask = header->u.s16.m16;
} else if (payload_len == 127 && input->offset >= 14) {
*payload_remain = be64_to_cpu(header->u.s64.l64);
*header_size = 14;
*payload_mask = header->u.s64.m64;
} else {
/* header not complete */
return 0;
}
return 1;
}
int vncws_decode_frame_payload(Buffer *input,
size_t *payload_remain, WsMask *payload_mask,
uint8_t **payload, size_t *payload_size)
{
size_t i;
uint32_t *payload32;
*payload = input->buffer;
/* If we aren't at the end of the payload, then drop
* off the last bytes, so we're always multiple of 4
* for purpose of unmasking, except at end of payload
*/
if (input->offset < *payload_remain) {
*payload_size = input->offset - (input->offset % 4);
} else {
*payload_size = *payload_remain;
}
if (*payload_size == 0) {
return 0;
}
*payload_remain -= *payload_size;
/* unmask frame */
/* process 1 frame (32 bit op) */
payload32 = (uint32_t *)(*payload);
for (i = 0; i < *payload_size / 4; i++) {
payload32[i] ^= payload_mask->u;
}
/* process the remaining bytes (if any) */
for (i *= 4; i < *payload_size; i++) {
(*payload)[i] ^= payload_mask->c[i % 4];
}
return 1;
return TRUE;
}
ui/vnc-ws.h
+6 -65
View File
@@ -21,70 +21,11 @@
#ifndef __QEMU_UI_VNC_WS_H
#define __QEMU_UI_VNC_WS_H
#define B64LEN(__x) (((__x + 2) / 3) * 12 / 3)
#define SHA1_DIGEST_LEN 20
#define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1)
#define WS_CLIENT_KEY_LEN 24
#define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
#define WS_GUID_LEN strlen(WS_GUID)
#define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\
Upgrade: websocket\r\n\
Connection: Upgrade\r\n\
Sec-WebSocket-Accept: %s\r\n\
Sec-WebSocket-Protocol: binary\r\n\
\r\n"
#define WS_HANDSHAKE_DELIM "\r\n"
#define WS_HANDSHAKE_END "\r\n\r\n"
#define WS_SUPPORTED_VERSION "13"
#define WS_HEAD_MIN_LEN sizeof(uint16_t)
#define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t))
typedef union WsMask {
char c[4];
uint32_t u;
} WsMask;
typedef struct QEMU_PACKED WsHeader {
unsigned char b0;
unsigned char b1;
union {
struct QEMU_PACKED {
uint16_t l16;
WsMask m16;
} s16;
struct QEMU_PACKED {
uint64_t l64;
WsMask m64;
} s64;
WsMask m;
} u;
} WsHeader;
enum {
WS_OPCODE_CONTINUATION = 0x0,
WS_OPCODE_TEXT_FRAME = 0x1,
WS_OPCODE_BINARY_FRAME = 0x2,
WS_OPCODE_CLOSE = 0x8,
WS_OPCODE_PING = 0x9,
WS_OPCODE_PONG = 0xA
};
void vncws_tls_handshake_io(void *opaque);
void vncws_handshake_read(void *opaque);
long vnc_client_write_ws(VncState *vs);
long vnc_client_read_ws(VncState *vs);
void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size);
void vncws_encode_frame(Buffer *output, const void *payload,
const size_t payload_size);
int vncws_decode_frame_header(Buffer *input,
size_t *header_size,
size_t *payload_remain,
WsMask *payload_mask);
int vncws_decode_frame_payload(Buffer *input,
size_t *payload_remain, WsMask *payload_mask,
uint8_t **payload, size_t *payload_size);
gboolean vncws_tls_handshake_io(QIOChannel *ioc,
GIOCondition condition,
void *opaque);
gboolean vncws_handshake_io(QIOChannel *ioc,
GIOCondition condition,
void *opaque);
#endif /* __QEMU_UI_VNC_WS_H */
ui/vnc.c
+274 -338
View File
File diff suppressed because it is too large Load Diff
ui/vnc.h
+15 -16
View File
@@ -35,6 +35,8 @@
#include "qemu/bitmap.h"
#include "crypto/tlssession.h"
#include "qemu/buffer.h"
#include "io/channel-socket.h"
#include "io/channel-tls.h"
#include <zlib.h>
#include <stdbool.h>
@@ -145,8 +147,10 @@ struct VncDisplay
int num_exclusive;
int connections_limit;
VncSharePolicy share_policy;
int lsock;
int lwebsock;
QIOChannelSocket *lsock;
guint lsock_tag;
QIOChannelSocket *lwebsock;
guint lwebsock_tag;
bool ws_enabled;
DisplaySurface *ds;
DisplayChangeListener dcl;
@@ -248,7 +252,10 @@ struct VncJob
struct VncState
{
int csock;
QIOChannelSocket *sioc; /* The underlying socket */
QIOChannel *ioc; /* The channel currently used for I/O */
guint ioc_tag;
gboolean disconnecting;
DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
@@ -275,7 +282,7 @@ struct VncState
int auth;
int subauth; /* Used by VeNCrypt */
char challenge[VNC_AUTH_CHALLENGE_SIZE];
QCryptoTLSSession *tls;
QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
#ifdef CONFIG_VNC_SASL
VncStateSASL sasl;
#endif
@@ -286,10 +293,6 @@ struct VncState
Buffer output;
Buffer input;
Buffer ws_input;
Buffer ws_output;
size_t ws_payload_remain;
WsMask ws_payload_mask;
/* current output mode information */
VncWritePixels *write_pixels;
PixelFormat client_pf;
@@ -499,13 +502,12 @@ enum {
*****************************************************************************/
/* Event loop functions */
void vnc_client_read(void *opaque);
void vnc_client_write(void *opaque);
gboolean vnc_client_io(QIOChannel *ioc,
GIOCondition condition,
void *opaque);
ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
ssize_t vnc_tls_pull(char *buf, size_t len, void *opaque);
ssize_t vnc_tls_push(const char *buf, size_t len, void *opaque);
/* Protocol I/O functions */
void vnc_write(VncState *vs, const void *data, size_t len);
@@ -524,7 +526,7 @@ uint32_t read_u32(uint8_t *data, size_t offset);
/* Protocol stage functions */
void vnc_client_error(VncState *vs);
ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, int last_errno);
ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
void start_client_init(VncState *vs);
void start_auth_vnc(VncState *vs);
@@ -532,9 +534,6 @@ void start_auth_vnc(VncState *vs);
/* Misc helpers */
char *vnc_socket_local_addr(const char *format, int fd);
char *vnc_socket_remote_addr(const char *format, int fd);
static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
return (vs->features & (1 << feature));
}