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Proto_OpenVPN: Set max allowed ACKs to 8 for P_ACK_V1

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OpenVPN always allowed 8 ACKs in P_ACK_V1 packets but only used
up to 4 in other control packets. Since Softether drops all packets with
more than 4 ACKs it also drops legimate P_ACK_V1.

See also this issue: https://github.com/schwabe/ics-openvpn/issues/1486
This commit is contained in:
Arne Schwabe
2022-06-12 23:04:50 +02:00
parent 209f60f079
commit 37aa1ba534
2 changed files with 7 additions and 2 deletions
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3
src/Cedar/Proto_OpenVPN.h
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@ -14,7 +14,8 @@
#define OPENVPN_UDP_PORT 1194 // OpenVPN default UDP port number
#define OPENVPN_UDP_PORT_INCLUDE 1195 // OpenVPN default UDP port number (Operating within the client)
#define OPENVPN_MAX_NUMACK 4 // The maximum number of ACKs
#define OPENVPN_MAX_NUMACK 8 // The maximum number of ACKs
#define OPENVPN_MAX_NUMACK_NONACK 4 // The maximum number of ACKs in != P_ACK_V1
#define OPENVPN_NUM_CHANNELS 8 // Maximum number of channels during a session
#define OPENVPN_CONTROL_PACKET_RESEND_INTERVAL 500 // Control packet retransmission interval
#define OPENVPN_CONTROL_PACKET_MAX_DATASIZE 1200 // Maximum data size that can be stored in one control packet