mirror of https://github.com/FreeRDP/FreeRDP
[core,connection] relax state machine
contrary to '[MS-RDPBCGR] 1.3.9 Connect-Time and Continuous Network Characteristics Detection' we have seen autodetection reqeusts mixed in between licensing messages. This relaxes the state machine and allows handling.
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@ -1109,10 +1109,6 @@ BOOL rdp_client_connect_mcs_channel_join_confirm(rdpRdp* rdp, wStream* s)
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BOOL rdp_client_connect_auto_detect(rdpRdp* rdp, wStream* s)
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{
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size_t pos;
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UINT16 length;
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UINT16 channelId;
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WINPR_ASSERT(rdp);
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WINPR_ASSERT(rdp->mcs);
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@ -1121,7 +1117,9 @@ BOOL rdp_client_connect_auto_detect(rdpRdp* rdp, wStream* s)
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if (messageChannelId != 0)
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{
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/* Process any MCS message channel PDUs. */
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pos = Stream_GetPosition(s);
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const size_t pos = Stream_GetPosition(s);
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UINT16 length = 0;
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UINT16 channelId = 0;
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if (rdp_read_header(rdp, s, &length, &channelId))
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{
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@ -1172,6 +1170,15 @@ state_run_t rdp_client_connect_license(rdpRdp* rdp, wStream* s)
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return STATE_RUN_FAILED;
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}
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/* there might be autodetect messages mixed in between licensing messages.
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* that has been observed with 2k12 R2 and 2k19
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*/
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const UINT16 messageChannelId = rdp->mcs->messageChannelId;
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if (channelId == messageChannelId)
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{
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return rdp_recv_message_channel_pdu(rdp, s, securityFlags);
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}
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if ((securityFlags & SEC_LICENSE_PKT) == 0)
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{
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char buffer[512] = { 0 };
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