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socket_manager_unix: Support REUSEPORT option via envvar #103

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Jan 24, 2020
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socket_manager_unix: Support REUSEPORT option via envvar #103

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22 changes: 17 additions & 5 deletions lib/serverengine/socket_manager_unix.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -50,11 +50,23 @@ module ServerModule
private

def listen_tcp_new(bind_ip, port)
# TCPServer.new doesn't set IPV6_V6ONLY flag, so use Addrinfo class instead.
# TODO: make backlog configurable if necessary
tsock = Addrinfo.tcp(bind_ip.to_s, port).listen(::Socket::SOMAXCONN)
tsock.autoclose = false
TCPServer.for_fd(tsock.fileno)
if ENV['SERVERENGINE_USE_SOCKET_REUSEPORT'] == '1'
# Based on Addrinfo#listen
tsock = Socket.new(bind_ip.ipv6? ? ::Socket::AF_INET6 : ::Socket::AF_INET, ::Socket::SOCK_STREAM, 0)
tsock.ipv6only! if bind_ip.ipv6?
tsock.setsockopt(:SOCKET, :REUSEPORT, true)
tsock.setsockopt(:SOCKET, :REUSEADDR, true)
tsock.bind(Addrinfo.tcp(bind_ip.to_s, port))
tsock.listen(::Socket::SOMAXCONN)
tsock.autoclose = false
TCPServer.for_fd(tsock.fileno)
else
# TCPServer.new doesn't set IPV6_V6ONLY flag, so use Addrinfo class instead.
# TODO: make backlog configurable if necessary
tsock = Addrinfo.tcp(bind_ip.to_s, port).listen(::Socket::SOMAXCONN)
tsock.autoclose = false
TCPServer.for_fd(tsock.fileno)
end
end

def listen_udp_new(bind_ip, port)
Expand Down