diff options
Diffstat (limited to 'pkg/tcpip/transport/tcp/endpoint.go')
| -rw-r--r-- | pkg/tcpip/transport/tcp/endpoint.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go index c5daba232..9438056f9 100644 --- a/pkg/tcpip/transport/tcp/endpoint.go +++ b/pkg/tcpip/transport/tcp/endpoint.go @@ -2474,6 +2474,20 @@ func (e *endpoint) shutdownLocked(flags tcpip.ShutdownFlags) tcpip.Error { // Listen puts the endpoint in "listen" mode, which allows it to accept // new connections. func (e *endpoint) Listen(backlog int) tcpip.Error { + if uint32(backlog) > MaxListenBacklog { + // Linux treats incoming backlog as uint with a limit defined by + // sysctl_somaxconn. + // https://github.com/torvalds/linux/blob/7acac4b3196/net/socket.c#L1666 + // + // We use the backlog to allocate a channel of that size, hence enforce + // a hard limit for the backlog. + backlog = MaxListenBacklog + } else { + // Accept one more than the configured listen backlog to keep in parity with + // Linux. Ref, because of missing equality check here: + // https://github.com/torvalds/linux/blob/7acac4b3196/include/net/sock.h#L937 + backlog++ + } err := e.listen(backlog) if err != nil { if !err.IgnoreStats() { |