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Vary keepalive timeout when obfuscation is active

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This commit is contained in:
Ludvig Strigeus 2018-12-10 23:46:59 +01:00
parent 7736cc700f
commit 008dc6c785
2 changed files with 8 additions and 2 deletions
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7
wireguard_proto.cpp
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@ -350,6 +350,7 @@ WgPeer::WgPeer(WgDevice *dev) {
last_handshake_init_recv_timestamp_ = 0;
last_complete_handskake_timestamp_ = 0;
persistent_keepalive_ms_ = 0;
keepalive_timeout_ms_ = KEEPALIVE_TIMEOUT_MS;
rx_bytes_ = 0;
tx_bytes_ = 0;
timers_ = 0;
@ -1178,7 +1179,11 @@ uint32 WgPeer::CheckTimeouts_Locked(uint64 now) {
rv |= ACTION_SEND_HANDSHAKE;
}
}
if ((t & (1 << TIMER_SEND_KEEPALIVE)) && (now32 - timer_value_[TIMER_SEND_KEEPALIVE]) >= KEEPALIVE_TIMEOUT_MS) {
if ((t & (1 << TIMER_SEND_KEEPALIVE)) && (now32 - timer_value_[TIMER_SEND_KEEPALIVE]) >= keepalive_timeout_ms_) {
// When header obfuscation is enabled, vary this between 7,8,9,10,11,12
if (WITH_HEADER_OBFUSCATION && dev_->packet_obfuscator().enabled())
keepalive_timeout_ms_ = KEEPALIVE_TIMEOUT_MS + ((int)(dev_->GetRandomNumber() % 6) - 3) * 1000;
t &= ~(1 << TIMER_SEND_KEEPALIVE);
rv |= ACTION_SEND_KEEPALIVE;
if (pending_keepalive_) {

3
wireguard_proto.h
View file

@ -60,7 +60,6 @@ enum ProtocolTimeouts {
KEEPALIVE_TIMEOUT_MS = 10000,
REKEY_AFTER_TIME_MS = 120000,
REJECT_AFTER_TIME_MS = 180000,
PERSISTENT_KEEPALIVE_MS = 25000,
MIN_HANDSHAKE_INTERVAL_MS = 20,
MAX_SIZE_OF_HANDSHAKE_EXTENSION = 1024,
@ -650,6 +649,8 @@ private:
uint8 num_ciphers_;
uint8 ciphers_[MAX_CIPHERS];
uint32 keepalive_timeout_ms_; // Set to KEEPALIVE_TIMEOUT_MS
uint64 rx_bytes_;
uint64 tx_bytes_;