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libxrdp: add clientRequestedProtocol only when RDPNEGDATA occurs.

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This commit is contained in:
speidy 2013-10-09 23:00:05 +03:00
parent a8ab4cb5d1
commit c2e7da84d4
2 changed files with 31 additions and 15 deletions
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26
libxrdp/xrdp_iso.c
View File

@ -51,13 +51,13 @@ xrdp_iso_delete(struct xrdp_iso *self)
/*****************************************************************************/
/* returns error */
static int APP_CC
xrdp_iso_recv_rdpnegreq(struct xrdp_iso *self, struct stream *s, int *requestedProtocol)
xrdp_iso_recv_rdpnegreq(struct xrdp_iso *self, struct stream *s)
{
int type;
int flags;
int len;
*requestedProtocol = 0;
self->requestedProtocol = 0;
DEBUG((" in xrdp_iso_recv_rdpnegreq"));
@ -82,7 +82,7 @@ xrdp_iso_recv_rdpnegreq(struct xrdp_iso *self, struct stream *s, int *requestedP
return 1;
}
in_uint32_le(s, *requestedProtocol);
in_uint32_le(s, self->requestedProtocol);
//TODO: think of protocol verification logic
// if (requestedProtocol != PROTOCOL_RDP || PROTOCOL_SSL || PROTOCOL_HYBRID || PROTOCOL_HYBRID_EX)
@ -167,7 +167,7 @@ xrdp_iso_recv(struct xrdp_iso *self, struct stream *s)
/*****************************************************************************/
static int APP_CC
xrdp_iso_send_rdpnegrsp(struct xrdp_iso *self, struct stream *s, int code, int selectedProtocol)
xrdp_iso_send_rdpnegrsp(struct xrdp_iso *self, struct stream *s, int code)
{
int send_rdpnegdata;
@ -178,7 +178,7 @@ xrdp_iso_send_rdpnegrsp(struct xrdp_iso *self, struct stream *s, int code, int s
//check for RDPNEGDATA
send_rdpnegdata = 1;
if (selectedProtocol == -1) {
if (self->selectedProtocol == -1) {
send_rdpnegdata = 0;
}
@ -209,7 +209,7 @@ xrdp_iso_send_rdpnegrsp(struct xrdp_iso *self, struct stream *s, int code, int s
out_uint8(s, RDP_NEG_RSP);
out_uint8(s, EXTENDED_CLIENT_DATA_SUPPORTED); /* flags */
out_uint16_le(s, 8); /* fixed length */
out_uint32_le(s, selectedProtocol); /* selected protocol */
out_uint32_le(s, self->selectedProtocol); /* selected protocol */
}
s_mark_end(s);
@ -256,10 +256,10 @@ xrdp_iso_send_rdpnegfailure(struct xrdp_iso *self, struct stream *s, int code, i
}
/*****************************************************************************/
static int APP_CC
xrdp_iso_proccess_nego(struct xrdp_iso *self, struct stream *s, int requstedProtocol)
xrdp_iso_proccess_nego(struct xrdp_iso *self, struct stream *s)
{
//TODO: negotiation logic here.
if (requstedProtocol != PROTOCOL_RDP) {
if (self->requestedProtocol != PROTOCOL_RDP) {
// Send RDP_NEG_FAILURE back to client
if (xrdp_iso_send_rdpnegfailure(self, s, ISO_PDU_CC, SSL_NOT_ALLOWED_BY_SERVER) != 0)
{
@ -267,8 +267,9 @@ xrdp_iso_proccess_nego(struct xrdp_iso *self, struct stream *s, int requstedProt
return 1;
}
} else {
self->selectedProtocol = PROTOCOL_RDP;
// Send RDP_NEG_RSP back to client
if (xrdp_iso_send_rdpnegrsp(self, s, ISO_PDU_CC, PROTOCOL_RDP) != 0)
if (xrdp_iso_send_rdpnegrsp(self, s, ISO_PDU_CC) != 0)
{
free_stream(s);
return 1;
@ -306,20 +307,21 @@ xrdp_iso_incoming(struct xrdp_iso *self)
if (len > 6) {
// Receive RDP_NEG_REQ data
if (xrdp_iso_recv_rdpnegreq(self, s, &requestedProtocol) != 0)
if (xrdp_iso_recv_rdpnegreq(self, s) != 0)
{
free_stream(s);
return 1;
}
// Process negotiation request, should return protocol type.
if (xrdp_iso_proccess_nego(self, s, requestedProtocol) != 0)
if (xrdp_iso_proccess_nego(self, s) != 0)
{
free_stream(s);
return 1;
}
}
else if (len == 6) {
xrdp_iso_send_rdpnegrsp(self, s, ISO_PDU_CC, -1);
self->selectedProtocol = -1; //we are not doing negotiation
xrdp_iso_send_rdpnegrsp(self, s, ISO_PDU_CC);
}
else {
DEBUG((" error in xrdp_iso_incoming: unknown length detected"));

20
libxrdp/xrdp_sec.c
View File

@ -986,14 +986,28 @@ xrdp_sec_out_mcs_data(struct xrdp_sec *self)
out_uint8(s, 0x63); /* c */
out_uint8(s, 0x44); /* D */
out_uint8(s, 0x6e); /* n */
out_uint16_be(s, 0x80fc + (num_channels_even * 2) + 4);
if (self->mcs_layer->iso_layer->selectedProtocol != -1) { // Check for RDPNEGDATA availability
out_uint16_be(s, 0x80fc + (num_channels_even * 2) + 4);
}
else
{
out_uint16_be(s, 0x80fc + (num_channels_even * 2));
}
out_uint16_le(s, SEC_TAG_SRV_INFO);
out_uint16_le(s, 12); /* len */
if (self->mcs_layer->iso_layer->selectedProtocol != -1) {
out_uint16_le(s, 12); /* len */
}
else
{
out_uint16_le(s, 8); /* len */
}
out_uint8(s, 4); /* 4 = rdp5 1 = rdp4 */
out_uint8(s, 0);
out_uint8(s, 8);
out_uint8(s, 0);
out_uint32_le(s, PROTOCOL_RDP); /* clientReqeustedProtocol */ //TODO: pass it through sec_layer->selectedProtocol
if (self->mcs_layer->iso_layer->selectedProtocol != -1) {
out_uint32_le(s, self->mcs_layer->iso_layer->selectedProtocol); /* clientReqeustedProtocol */
}
out_uint16_le(s, SEC_TAG_SRV_CHANNELS);
out_uint16_le(s, 8 + (num_channels_even * 2)); /* len */
out_uint16_le(s, MCS_GLOBAL_CHANNEL); /* 1003, 0x03eb main channel */