void vncws_handshake_read(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_handler2(vs->csock, NULL, 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);
}
}
void vncws_handshake_read(void *opaque)
{
VncState *vs = opaque;
uint8_t *handshake_end;
long ret;
buffer_reserve(&vs->ws_input, 4096);
ret = vnc_client_read_buf(vs, buffer_end(&vs->ws_input), 4096);
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_handler2(vs->csock, NULL, 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));
}
}
long vnc_client_read_ws(VncState *vs)
{
int ret, err;
uint8_t *payload;
size_t payload_size, frame_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;
/* make sure that nothing is left in the ws_input buffer */
do {
err = vncws_decode_frame(&vs->ws_input, &payload,
&payload_size, &frame_size);
if (err <= 0) {
return err;
}
buffer_reserve(&vs->input, payload_size);
buffer_append(&vs->input, payload, payload_size);
buffer_advance(&vs->ws_input, frame_size);
} while (vs->ws_input.offset > 0);
return ret;
}
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_read_sasl(VncState *vs)
{
long ret;
uint8_t encoded[4096];
const char *decoded;
unsigned int decodedLen;
int err;
ret = vnc_client_read_buf(vs, encoded, sizeof(encoded));
if (!ret)
return 0;
err = sasl_decode(vs->sasl.conn,
(char *)encoded, ret,
&decoded, &decodedLen);
if (err != SASL_OK)
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);
buffer_append(&vs->input, decoded, decodedLen);
return decodedLen;
}