diff options
Diffstat (limited to 'pkg/tcpip/transport/tcp/protocol.go')
| -rw-r--r-- | pkg/tcpip/transport/tcp/protocol.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/tcpip/transport/tcp/protocol.go b/pkg/tcpip/transport/tcp/protocol.go index cfd9a4e8e..1e64283b5 100644 --- a/pkg/tcpip/transport/tcp/protocol.go +++ b/pkg/tcpip/transport/tcp/protocol.go @@ -64,6 +64,10 @@ const ( // DefaultTCPTimeWaitTimeout is the amount of time that sockets linger // in TIME_WAIT state before being marked closed. DefaultTCPTimeWaitTimeout = 60 * time.Second + + // DefaultSynRetries is the default value for the number of SYN retransmits + // before a connect is aborted. + DefaultSynRetries = 6 ) // SACKEnabled option can be used to enable SACK support in the TCP @@ -164,6 +168,7 @@ type protocol struct { tcpTimeWaitTimeout time.Duration minRTO time.Duration synRcvdCount synRcvdCounter + synRetries uint8 dispatcher *dispatcher } @@ -346,6 +351,15 @@ func (p *protocol) SetOption(option interface{}) *tcpip.Error { p.mu.Unlock() return nil + case tcpip.TCPSynRetriesOption: + if v < 1 || v > 255 { + return tcpip.ErrInvalidOptionValue + } + p.mu.Lock() + p.synRetries = uint8(v) + p.mu.Unlock() + return nil + default: return tcpip.ErrUnknownProtocolOption } @@ -420,6 +434,12 @@ func (p *protocol) Option(option interface{}) *tcpip.Error { p.mu.RUnlock() return nil + case *tcpip.TCPSynRetriesOption: + p.mu.RLock() + *v = tcpip.TCPSynRetriesOption(p.synRetries) + p.mu.RUnlock() + return nil + default: return tcpip.ErrUnknownProtocolOption } @@ -452,6 +472,7 @@ func NewProtocol() stack.TransportProtocol { tcpTimeWaitTimeout: DefaultTCPTimeWaitTimeout, synRcvdCount: synRcvdCounter{threshold: SynRcvdCountThreshold}, dispatcher: newDispatcher(runtime.GOMAXPROCS(0)), + synRetries: DefaultSynRetries, minRTO: MinRTO, } } |