do not send out partial frames (Linux)
from /usr/include/linux/tcp.h
do not send out partial frames (FreeBSD)
Returns the configuration name of a socket as a string. sock may be a string value, in which case it is returned as-is Warning: TCP sockets may not always return the name given to it.
# File lib/unicorn/socket_helper.rb, line 199 def sock_name(sock) case sock when String then sock when UNIXServer Socket.unpack_sockaddr_un(sock.getsockname) when TCPServer tcp_name(sock) when Socket begin tcp_name(sock) rescue ArgumentError Socket.unpack_sockaddr_un(sock.getsockname) end else raise ArgumentError, "Unhandled class #{sock.class}: #{sock.inspect}" end end
returns rfc2732-style (e.g. “[::1]:666”) addresses for IPv6
# File lib/unicorn/socket_helper.rb, line 190 def tcp_name(sock) port, addr = Socket.unpack_sockaddr_in(sock.getsockname) /:/ =~ addr ? "[#{addr}]:#{port}" : "#{addr}:#{port}" end
# File lib/unicorn/socket_helper.rb, line 57 def accf_arg(af_name) [ af_name, nil ].pack('a16a240') end
creates a new server, socket. address may be a HOST:PORT or an absolute path to a UNIX socket. address can even be a Socket object in which case it is immediately returned
# File lib/unicorn/socket_helper.rb, line 136 def bind_listen(address = '0.0.0.0:8080', opt = {}) return address unless String === address sock = if address[0] == / if File.exist?(address) if File.socket?(address) begin UNIXSocket.new(address).close # fall through, try to bind(2) and fail with EADDRINUSE # (or succeed from a small race condition we can't sanely avoid). rescue Errno::ECONNREFUSED logger.info "unlinking existing socket=#{address}" File.unlink(address) end else raise ArgumentError, "socket=#{address} specified but it is not a socket!" end end old_umask = File.umask(opt[:umask] || 0) begin Kgio::UNIXServer.new(address) ensure File.umask(old_umask) end elsif /\A\[([a-fA-F0-9:]+)\]:(\d+)\z/ =~ address new_tcp_server($1, $2.to_i, opt.merge(:ipv6=>true)) elsif /\A(\d+\.\d+\.\d+\.\d+):(\d+)\z/ =~ address new_tcp_server($1, $2.to_i, opt) else raise ArgumentError, "Don't know how to bind: #{address}" end set_server_sockopt(sock, opt) sock end
# File lib/unicorn/socket_helper.rb, line 127 def log_buffer_sizes(sock, pfx = '') rcvbuf = sock.getsockopt(SOL_SOCKET, SO_RCVBUF).unpack('i') sndbuf = sock.getsockopt(SOL_SOCKET, SO_SNDBUF).unpack('i') logger.info "#{pfx}#{sock_name(sock)} rcvbuf=#{rcvbuf} sndbuf=#{sndbuf}" end
# File lib/unicorn/socket_helper.rb, line 172 def new_tcp_server(addr, port, opt) # n.b. we set FD_CLOEXEC in the workers sock = Socket.new(opt[:ipv6] ? AF_INET6 : AF_INET, SOCK_STREAM, 0) if opt.key?(:ipv6only) defined?(IPV6_V6ONLY) or abort "Socket::IPV6_V6ONLY not defined, upgrade Ruby and/or your OS" sock.setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, opt[:ipv6only] ? 1 : 0) end sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1) if defined?(SO_REUSEPORT) && opt[:reuseport] sock.setsockopt(SOL_SOCKET, SO_REUSEPORT, 1) end sock.bind(Socket.pack_sockaddr_in(port, addr)) prevent_autoclose(sock) Kgio::TCPServer.for_fd(sock.fileno) end
# File lib/unicorn/socket_helper.rb, line 62 def prevent_autoclose(io) if io.respond_to?(:autoclose=) io.autoclose = false else IO_PURGATORY << io end end
casts a given Socket to be a TCPServer or UNIXServer
# File lib/unicorn/socket_helper.rb, line 220 def server_cast(sock) begin Socket.unpack_sockaddr_in(sock.getsockname) Kgio::TCPServer.for_fd(sock.fileno) rescue ArgumentError Kgio::UNIXServer.for_fd(sock.fileno) end end
# File lib/unicorn/socket_helper.rb, line 111 def set_server_sockopt(sock, opt) opt = DEFAULTS.merge(opt || {}) TCPSocket === sock and set_tcp_sockopt(sock, opt) if opt[:rcvbuf] || opt[:sndbuf] log_buffer_sizes(sock, "before: ") sock.setsockopt(SOL_SOCKET, SO_RCVBUF, opt[:rcvbuf]) if opt[:rcvbuf] sock.setsockopt(SOL_SOCKET, SO_SNDBUF, opt[:sndbuf]) if opt[:sndbuf] log_buffer_sizes(sock, " after: ") end sock.listen(opt[:backlog]) rescue => e Unicorn.log_error(logger, "#{sock_name(sock)} #{opt.inspect}", e) end
# File lib/unicorn/socket_helper.rb, line 70 def set_tcp_sockopt(sock, opt) # just in case, even LANs can break sometimes. Linux sysadmins # can lower net.ipv4.tcp_keepalive_* sysctl knobs to very low values. sock.setsockopt(SOL_SOCKET, SO_KEEPALIVE, 1) if defined?(SO_KEEPALIVE) if defined?(TCP_NODELAY) val = opt[:tcp_nodelay] val = DEFAULTS[:tcp_nodelay] if nil == val sock.setsockopt(IPPROTO_TCP, TCP_NODELAY, val ? 1 : 0) end val = opt[:tcp_nopush] unless val.nil? if defined?(TCP_CORK) # Linux sock.setsockopt(IPPROTO_TCP, TCP_CORK, val) elsif defined?(TCP_NOPUSH) # TCP_NOPUSH is lightly tested (FreeBSD) sock.setsockopt(IPPROTO_TCP, TCP_NOPUSH, val) end end # No good reason to ever have deferred accepts off # (except maybe benchmarking) if defined?(TCP_DEFER_ACCEPT) # this differs from nginx, since nginx doesn't allow us to # configure the the timeout... seconds = opt[:tcp_defer_accept] seconds = DEFAULTS[:tcp_defer_accept] if [true,nil].include?(seconds) seconds = 0 unless seconds # nil/false means disable this sock.setsockopt(SOL_TCP, TCP_DEFER_ACCEPT, seconds) elsif respond_to?(:accf_arg) name = opt[:accept_filter] name = DEFAULTS[:accept_filter] if nil == name begin sock.setsockopt(SOL_SOCKET, SO_ACCEPTFILTER, accf_arg(name)) rescue => e logger.error("#{sock_name(sock)} " "failed to set accept_filter=#{name} (#{e.inspect})") end end end
Returns the configuration name of a socket as a string. sock may be a string value, in which case it is returned as-is Warning: TCP sockets may not always return the name given to it.
# File lib/unicorn/socket_helper.rb, line 199 def sock_name(sock) case sock when String then sock when UNIXServer Socket.unpack_sockaddr_un(sock.getsockname) when TCPServer tcp_name(sock) when Socket begin tcp_name(sock) rescue ArgumentError Socket.unpack_sockaddr_un(sock.getsockname) end else raise ArgumentError, "Unhandled class #{sock.class}: #{sock.inspect}" end end
returns rfc2732-style (e.g. “[::1]:666”) addresses for IPv6
# File lib/unicorn/socket_helper.rb, line 190 def tcp_name(sock) port, addr = Socket.unpack_sockaddr_in(sock.getsockname) /:/ =~ addr ? "[#{addr}]:#{port}" : "#{addr}:#{port}" end