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Current Path: /opt/golang/1.22.0/src/net

📁 ..
📄 addrselect.go(9.69 KB)
📄 addrselect_test.go(8.5 KB)
📄 cgo_aix.go(582 B)
📄 cgo_android.go(272 B)
📄 cgo_bsd.go(343 B)
📄 cgo_darwin.go(298 B)
📄 cgo_linux.go(642 B)
📄 cgo_netbsd.go(276 B)
📄 cgo_openbsd.go(276 B)
📄 cgo_resnew.go(580 B)
📄 cgo_resold.go(579 B)
📄 cgo_socknew.go(753 B)
📄 cgo_sockold.go(842 B)
📄 cgo_solaris.go(343 B)
📄 cgo_stub.go(1.33 KB)
📄 cgo_unix.go(11.35 KB)
📄 cgo_unix_cgo.go(2.24 KB)
📄 cgo_unix_cgo_darwin.go(461 B)
📄 cgo_unix_cgo_res.go(911 B)
📄 cgo_unix_cgo_resn.go(998 B)
📄 cgo_unix_syscall.go(2.99 KB)
📄 cgo_unix_test.go(1.44 KB)
📄 conf.go(15.63 KB)
📄 conf_test.go(12.28 KB)
📄 conn_test.go(1.82 KB)
📄 dial.go(25.68 KB)
📄 dial_test.go(30.14 KB)
📄 dial_unix_test.go(2.77 KB)
📄 dnsclient.go(5.65 KB)
📄 dnsclient_test.go(1.51 KB)
📄 dnsclient_unix.go(24.26 KB)
📄 dnsclient_unix_test.go(69.13 KB)
📄 dnsconfig.go(1.73 KB)
📄 dnsconfig_unix.go(4.16 KB)
📄 dnsconfig_unix_test.go(7.07 KB)
📄 dnsconfig_windows.go(1.6 KB)
📄 dnsname_test.go(1.96 KB)
📄 error_plan9.go(224 B)
📄 error_plan9_test.go(437 B)
📄 error_posix.go(543 B)
📄 error_posix_test.go(981 B)
📄 error_test.go(20.32 KB)
📄 error_unix.go(382 B)
📄 error_unix_test.go(723 B)
📄 error_windows.go(355 B)
📄 error_windows_test.go(757 B)
📄 example_test.go(8.45 KB)
📄 external_test.go(4.05 KB)
📄 fd_fake.go(3.79 KB)
📄 fd_js.go(627 B)
📄 fd_plan9.go(3.56 KB)
📄 fd_posix.go(4.29 KB)
📄 fd_unix.go(5.43 KB)
📄 fd_wasip1.go(496 B)
📄 fd_windows.go(6.14 KB)
📄 file.go(1.69 KB)
📄 file_plan9.go(2.72 KB)
📄 file_stub.go(481 B)
📄 file_test.go(6.43 KB)
📄 file_unix.go(2.5 KB)
📄 file_unix_test.go(2.07 KB)
📄 file_wasip1.go(2.2 KB)
📄 file_wasip1_test.go(3.76 KB)
📄 file_windows.go(521 B)
📄 hook.go(894 B)
📄 hook_plan9.go(211 B)
📄 hook_unix.go(658 B)
📄 hook_windows.go(720 B)
📄 hosts.go(3.48 KB)
📄 hosts_test.go(5.6 KB)
📁 http
📄 interface.go(7.26 KB)
📄 interface_aix.go(4.46 KB)
📄 interface_bsd.go(2.82 KB)
📄 interface_bsd_test.go(1.44 KB)
📄 interface_bsdvar.go(718 B)
📄 interface_darwin.go(1.29 KB)
📄 interface_freebsd.go(1.29 KB)
📄 interface_linux.go(6.96 KB)
📄 interface_linux_test.go(3.65 KB)
📄 interface_plan9.go(4.71 KB)
📄 interface_solaris.go(2.13 KB)
📄 interface_stub.go(814 B)
📄 interface_test.go(9.76 KB)
📄 interface_unix_test.go(4.85 KB)
📄 interface_windows.go(5.43 KB)
📁 internal
📄 ip.go(13.88 KB)
📄 ip_test.go(25.6 KB)
📄 iprawsock.go(7.11 KB)
📄 iprawsock_plan9.go(874 B)
📄 iprawsock_posix.go(3.89 KB)
📄 iprawsock_test.go(5.98 KB)
📄 ipsock.go(9.05 KB)
📄 ipsock_plan9.go(7.48 KB)
📄 ipsock_plan9_test.go(645 B)
📄 ipsock_posix.go(7.86 KB)
📄 ipsock_test.go(6.81 KB)
📄 listen_test.go(20.5 KB)
📄 lookup.go(29.04 KB)
📄 lookup_plan9.go(9.94 KB)
📄 lookup_test.go(40.62 KB)
📄 lookup_unix.go(3.35 KB)
📄 lookup_windows.go(13.8 KB)
📄 lookup_windows_test.go(8.93 KB)
📄 mac.go(1.88 KB)
📄 mac_test.go(3.26 KB)
📁 mail
📄 main_cloexec_test.go(693 B)
📄 main_conf_test.go(1.39 KB)
📄 main_noconf_test.go(467 B)
📄 main_plan9_test.go(392 B)
📄 main_posix_test.go(1.37 KB)
📄 main_test.go(7.53 KB)
📄 main_unix_test.go(1.19 KB)
📄 main_wasm_test.go(284 B)
📄 main_windows_test.go(1 KB)
📄 mockserver_test.go(10.77 KB)
📄 mptcpsock_linux.go(3.96 KB)
📄 mptcpsock_linux_test.go(4.06 KB)
📄 mptcpsock_stub.go(542 B)
📄 net.go(24.56 KB)
📄 net_fake.go(26.36 KB)
📄 net_fake_test.go(2.79 KB)
📄 net_test.go(14 KB)
📄 net_windows_test.go(16.28 KB)
📄 netcgo_off.go(222 B)
📄 netcgo_on.go(220 B)
📄 netgo_netcgo.go(453 B)
📄 netgo_off.go(220 B)
📄 netgo_on.go(218 B)
📁 netip
📄 nss.go(5.48 KB)
📄 nss_test.go(3.4 KB)
📄 packetconn_test.go(3.02 KB)
📄 parse.go(6.04 KB)
📄 parse_test.go(1.55 KB)
📄 pipe.go(5.43 KB)
📄 pipe_test.go(1.2 KB)
📄 platform_test.go(4.33 KB)
📄 port.go(1.46 KB)
📄 port_test.go(1.34 KB)
📄 port_unix.go(1.24 KB)
📄 protoconn_test.go(7.44 KB)
📄 rawconn.go(2.7 KB)
📄 rawconn_stub_test.go(631 B)
📄 rawconn_test.go(4.33 KB)
📄 rawconn_unix_test.go(2.96 KB)
📄 rawconn_windows_test.go(3.12 KB)
📄 resolverdialfunc_test.go(8.25 KB)
📄 rlimit_js.go(346 B)
📄 rlimit_unix.go(1.1 KB)
📁 rpc
📄 sendfile_linux.go(1.12 KB)
📄 sendfile_linux_test.go(1.93 KB)
📄 sendfile_stub.go(344 B)
📄 sendfile_test.go(8.25 KB)
📄 sendfile_unix_alt.go(2.04 KB)
📄 sendfile_windows.go(1.02 KB)
📄 server_test.go(11.67 KB)
📁 smtp
📄 sock_bsd.go(918 B)
📄 sock_cloexec.go(1.38 KB)
📄 sock_linux.go(993 B)
📄 sock_linux_test.go(575 B)
📄 sock_plan9.go(262 B)
📄 sock_posix.go(6.29 KB)
📄 sock_stub.go(390 B)
📄 sock_windows.go(802 B)
📄 sockaddr_posix.go(1.45 KB)
📄 sockopt_aix.go(1.43 KB)
📄 sockopt_bsd.go(2.21 KB)
📄 sockopt_fake.go(955 B)
📄 sockopt_linux.go(1.25 KB)
📄 sockopt_plan9.go(406 B)
📄 sockopt_posix.go(2.13 KB)
📄 sockopt_solaris.go(1.25 KB)
📄 sockopt_windows.go(1.51 KB)
📄 sockoptip_bsdvar.go(867 B)
📄 sockoptip_linux.go(735 B)
📄 sockoptip_posix.go(1.38 KB)
📄 sockoptip_stub.go(769 B)
📄 sockoptip_windows.go(786 B)
📄 splice_linux.go(1.69 KB)
📄 splice_stub.go(376 B)
📄 splice_test.go(13.48 KB)
📄 sys_cloexec.go(962 B)
📄 tcpsock.go(11.75 KB)
📄 tcpsock_plan9.go(2.18 KB)
📄 tcpsock_posix.go(6.16 KB)
📄 tcpsock_test.go(17.68 KB)
📄 tcpsock_unix_test.go(2.34 KB)
📄 tcpsockopt_darwin.go(770 B)
📄 tcpsockopt_dragonfly.go(698 B)
📄 tcpsockopt_openbsd.go(365 B)
📄 tcpsockopt_plan9.go(525 B)
📄 tcpsockopt_posix.go(442 B)
📄 tcpsockopt_solaris.go(1.15 KB)
📄 tcpsockopt_stub.go(399 B)
📄 tcpsockopt_unix.go(722 B)
📄 tcpsockopt_windows.go(741 B)
📁 testdata
📁 textproto
📄 timeout_test.go(29.11 KB)
📄 udpsock.go(11.83 KB)
📄 udpsock_plan9.go(4.64 KB)
📄 udpsock_plan9_test.go(1.31 KB)
📄 udpsock_posix.go(7.53 KB)
📄 udpsock_test.go(17.24 KB)
📄 unixsock.go(10.12 KB)
📄 unixsock_linux_test.go(2.29 KB)
📄 unixsock_plan9.go(1.24 KB)
📄 unixsock_posix.go(6.64 KB)
📄 unixsock_readmsg_cloexec.go(654 B)
📄 unixsock_readmsg_cmsg_cloexec.go(332 B)
📄 unixsock_readmsg_other.go(275 B)
📄 unixsock_readmsg_test.go(2.51 KB)
📄 unixsock_test.go(10.64 KB)
📄 unixsock_windows_test.go(2.03 KB)
📁 url
📄 write_unix_test.go(1.61 KB)
📄 writev_test.go(5.03 KB)
📄 writev_unix.go(666 B)

Editing: udpsock_plan9.go

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package net

import (
	"context"
	"errors"
	"net/netip"
	"os"
	"syscall"
)

func (c *UDPConn) readFrom(b []byte, addr *UDPAddr) (int, *UDPAddr, error) {
	buf := make([]byte, udpHeaderSize+len(b))
	m, err := c.fd.Read(buf)
	if err != nil {
		return 0, nil, err
	}
	if m < udpHeaderSize {
		return 0, nil, errors.New("short read reading UDP header")
	}
	buf = buf[:m]

h, buf := unmarshalUDPHeader(buf)
	n := copy(b, buf)
	*addr = UDPAddr{IP: h.raddr, Port: int(h.rport)}
	return n, addr, nil
}

func (c *UDPConn) readFromAddrPort(b []byte) (int, netip.AddrPort, error) {
	// TODO: optimize. The equivalent code on posix is alloc-free.
	buf := make([]byte, udpHeaderSize+len(b))
	m, err := c.fd.Read(buf)
	if err != nil {
		return 0, netip.AddrPort{}, err
	}
	if m < udpHeaderSize {
		return 0, netip.AddrPort{}, errors.New("short read reading UDP header")
	}
	buf = buf[:m]

h, buf := unmarshalUDPHeader(buf)
	n := copy(b, buf)
	ip, _ := netip.AddrFromSlice(h.raddr)
	addr := netip.AddrPortFrom(ip, h.rport)
	return n, addr, nil
}

func (c *UDPConn) readMsg(b, oob []byte) (n, oobn, flags int, addr netip.AddrPort, err error) {
	return 0, 0, 0, netip.AddrPort{}, syscall.EPLAN9
}

func (c *UDPConn) writeTo(b []byte, addr *UDPAddr) (int, error) {
	if addr == nil {
		return 0, errMissingAddress
	}
	h := new(udpHeader)
	h.raddr = addr.IP.To16()
	h.laddr = c.fd.laddr.(*UDPAddr).IP.To16()
	h.ifcaddr = IPv6zero // ignored (receive only)
	h.rport = uint16(addr.Port)
	h.lport = uint16(c.fd.laddr.(*UDPAddr).Port)

buf := make([]byte, udpHeaderSize+len(b))
	i := copy(buf, h.Bytes())
	copy(buf[i:], b)
	if _, err := c.fd.Write(buf); err != nil {
		return 0, err
	}
	return len(b), nil
}

func (c *UDPConn) writeToAddrPort(b []byte, addr netip.AddrPort) (int, error) {
	return c.writeTo(b, UDPAddrFromAddrPort(addr)) // TODO: optimize instead of allocating
}

func (c *UDPConn) writeMsg(b, oob []byte, addr *UDPAddr) (n, oobn int, err error) {
	return 0, 0, syscall.EPLAN9
}

func (c *UDPConn) writeMsgAddrPort(b, oob []byte, addr netip.AddrPort) (n, oobn int, err error) {
	return 0, 0, syscall.EPLAN9
}

func (sd *sysDialer) dialUDP(ctx context.Context, laddr, raddr *UDPAddr) (*UDPConn, error) {
	fd, err := dialPlan9(ctx, sd.network, laddr, raddr)
	if err != nil {
		return nil, err
	}
	return newUDPConn(fd), nil
}

const udpHeaderSize = 16*3 + 2*2

type udpHeader struct {
	raddr, laddr, ifcaddr IP
	rport, lport          uint16
}

func (h *udpHeader) Bytes() []byte {
	b := make([]byte, udpHeaderSize)
	i := 0
	i += copy(b[i:i+16], h.raddr)
	i += copy(b[i:i+16], h.laddr)
	i += copy(b[i:i+16], h.ifcaddr)
	b[i], b[i+1], i = byte(h.rport>>8), byte(h.rport), i+2
	b[i], b[i+1], i = byte(h.lport>>8), byte(h.lport), i+2
	return b
}

func unmarshalUDPHeader(b []byte) (*udpHeader, []byte) {
	h := new(udpHeader)
	h.raddr, b = IP(b[:16]), b[16:]
	h.laddr, b = IP(b[:16]), b[16:]
	h.ifcaddr, b = IP(b[:16]), b[16:]
	h.rport, b = uint16(b[0])<<8|uint16(b[1]), b[2:]
	h.lport, b = uint16(b[0])<<8|uint16(b[1]), b[2:]
	return h, b
}

func (sl *sysListener) listenUDP(ctx context.Context, laddr *UDPAddr) (*UDPConn, error) {
	l, err := listenPlan9(ctx, sl.network, laddr)
	if err != nil {
		return nil, err
	}
	_, err = l.ctl.WriteString("headers")
	if err != nil {
		return nil, err
	}
	l.data, err = os.OpenFile(l.dir+"/data", os.O_RDWR, 0)
	if err != nil {
		return nil, err
	}
	fd, err := l.netFD()
	return newUDPConn(fd), err
}

func (sl *sysListener) listenMulticastUDP(ctx context.Context, ifi *Interface, gaddr *UDPAddr) (*UDPConn, error) {
	// Plan 9 does not like announce command with a multicast address,
	// so do not specify an IP address when listening.
	l, err := listenPlan9(ctx, sl.network, &UDPAddr{IP: nil, Port: gaddr.Port, Zone: gaddr.Zone})
	if err != nil {
		return nil, err
	}
	_, err = l.ctl.WriteString("headers")
	if err != nil {
		return nil, err
	}
	var addrs []Addr
	if ifi != nil {
		addrs, err = ifi.Addrs()
		if err != nil {
			return nil, err
		}
	} else {
		addrs, err = InterfaceAddrs()
		if err != nil {
			return nil, err
		}
	}

have4 := gaddr.IP.To4() != nil
	for _, addr := range addrs {
		if ipnet, ok := addr.(*IPNet); ok && (ipnet.IP.To4() != nil) == have4 {
			_, err = l.ctl.WriteString("addmulti " + ipnet.IP.String() + " " + gaddr.IP.String())
			if err != nil {
				return nil, &OpError{Op: "addmulti", Net: "", Source: nil, Addr: ipnet, Err: err}
			}
		}
	}
	l.data, err = os.OpenFile(l.dir+"/data", os.O_RDWR, 0)
	if err != nil {
		return nil, err
	}
	fd, err := l.netFD()
	if err != nil {
		return nil, err
	}
	return newUDPConn(fd), nil
}

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Editing: udpsock_plan9.go

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