2011-08-17 11:28:29 -06:00
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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net, cmd/fix: add IPv6 scoped addressing zone to INET, INET6 address structs
This CL starts to introduce IPv6 scoped addressing capability
into the net package.
The Public API changes are:
+pkg net, type IPAddr struct, Zone string
+pkg net, type IPNet struct, Zone string
+pkg net, type TCPAddr struct, Zone string
+pkg net, type UDPAddr struct, Zone string
Update #4234.
R=rsc, bradfitz, iant
CC=golang-dev
https://golang.org/cl/6849045
2012-11-26 08:45:42 -07:00
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// Internet protocol family sockets for Plan 9
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2011-08-17 11:28:29 -06:00
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package net
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import (
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2011-11-01 20:05:34 -06:00
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"errors"
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"os"
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)
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2012-06-06 16:38:56 -06:00
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// /sys/include/ape/sys/socket.h:/SOMAXCONN
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var listenerBacklog = 5
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2012-09-26 01:11:49 -06:00
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// probeIPv6Stack returns two boolean values. If the first boolean
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// value is true, kernel supports basic IPv6 functionality. If the
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// second boolean value is true, kernel supports IPv6 IPv4-mapping.
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2011-08-17 11:28:29 -06:00
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func probeIPv6Stack() (supportsIPv6, supportsIPv4map bool) {
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return false, false
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}
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// parsePlan9Addr parses address of the form [ip!]port (e.g. 127.0.0.1!80).
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func parsePlan9Addr(s string) (ip IP, iport int, err error) {
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addr := IPv4zero // address contains port only
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i := byteIndex(s, '!')
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if i >= 0 {
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addr = ParseIP(s[:i])
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if addr == nil {
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return nil, 0, errors.New("net: parsing IP failed")
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}
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}
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p, _, ok := dtoi(s[i+1:], 0)
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if !ok {
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return nil, 0, errors.New("net: parsing port failed")
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}
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if p < 0 || p > 0xFFFF {
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return nil, 0, &AddrError{"invalid port", string(p)}
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}
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return addr, p, nil
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}
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2011-11-01 20:05:34 -06:00
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func readPlan9Addr(proto, filename string) (addr Addr, err error) {
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var buf [128]byte
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f, err := os.Open(filename)
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if err != nil {
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return
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}
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defer f.Close()
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n, err := f.Read(buf[:])
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if err != nil {
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return
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}
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ip, port, err := parsePlan9Addr(string(buf[:n]))
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if err != nil {
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return
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}
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switch proto {
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case "tcp":
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net, cmd/fix: add IPv6 scoped addressing zone to INET, INET6 address structs
This CL starts to introduce IPv6 scoped addressing capability
into the net package.
The Public API changes are:
+pkg net, type IPAddr struct, Zone string
+pkg net, type IPNet struct, Zone string
+pkg net, type TCPAddr struct, Zone string
+pkg net, type UDPAddr struct, Zone string
Update #4234.
R=rsc, bradfitz, iant
CC=golang-dev
https://golang.org/cl/6849045
2012-11-26 08:45:42 -07:00
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addr = &TCPAddr{IP: ip, Port: port}
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case "udp":
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net, cmd/fix: add IPv6 scoped addressing zone to INET, INET6 address structs
This CL starts to introduce IPv6 scoped addressing capability
into the net package.
The Public API changes are:
+pkg net, type IPAddr struct, Zone string
+pkg net, type IPNet struct, Zone string
+pkg net, type TCPAddr struct, Zone string
+pkg net, type UDPAddr struct, Zone string
Update #4234.
R=rsc, bradfitz, iant
CC=golang-dev
https://golang.org/cl/6849045
2012-11-26 08:45:42 -07:00
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addr = &UDPAddr{IP: ip, Port: port}
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default:
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return nil, errors.New("unknown protocol " + proto)
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}
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return addr, nil
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}
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2011-11-01 20:05:34 -06:00
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func startPlan9(net string, addr Addr) (ctl *os.File, dest, proto, name string, err error) {
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var (
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ip IP
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port int
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)
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switch a := addr.(type) {
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case *TCPAddr:
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proto = "tcp"
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ip = a.IP
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port = a.Port
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case *UDPAddr:
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proto = "udp"
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ip = a.IP
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port = a.Port
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default:
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err = UnknownNetworkError(net)
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return
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}
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clone, dest, err := queryCS1(proto, ip, port)
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if err != nil {
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return
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}
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f, err := os.OpenFile(clone, os.O_RDWR, 0)
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if err != nil {
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return
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}
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var buf [16]byte
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n, err := f.Read(buf[:])
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if err != nil {
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f.Close()
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2011-08-17 11:28:29 -06:00
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return
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}
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return f, dest, proto, string(buf[:n]), nil
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}
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2012-11-13 00:18:37 -07:00
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func dialPlan9(net string, laddr, raddr Addr) (*netFD, error) {
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f, dest, proto, name, err := startPlan9(net, raddr)
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if err != nil {
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return nil, err
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}
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_, err = f.WriteString("connect " + dest)
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if err != nil {
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f.Close()
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return nil, err
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}
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data, err := os.OpenFile("/net/"+proto+"/"+name+"/data", os.O_RDWR, 0)
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if err != nil {
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f.Close()
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return nil, err
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}
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2011-08-17 11:28:29 -06:00
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laddr, err = readPlan9Addr(proto, "/net/"+proto+"/"+name+"/local")
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if err != nil {
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data.Close()
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f.Close()
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return nil, err
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}
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raddr, err = readPlan9Addr(proto, "/net/"+proto+"/"+name+"/remote")
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if err != nil {
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data.Close()
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f.Close()
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return nil, err
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}
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return newFD(proto, name, f, data, laddr, raddr), nil
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}
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2012-11-13 00:18:37 -07:00
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func listenPlan9(net string, laddr Addr) (*netFD, error) {
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f, dest, proto, name, err := startPlan9(net, laddr)
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if err != nil {
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return nil, err
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}
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_, err = f.WriteString("announce " + dest)
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if err != nil {
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f.Close()
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return nil, err
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}
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laddr, err = readPlan9Addr(proto, "/net/"+proto+"/"+name+"/local")
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if err != nil {
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f.Close()
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return nil, err
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}
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return newFD(proto, name, f, nil, laddr, nil), nil
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}
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2012-11-13 00:18:37 -07:00
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func (l *netFD) netFD() *netFD {
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return newFD(l.proto, l.name, l.ctl, l.data, l.laddr, l.raddr)
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}
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func (l *netFD) acceptPlan9() (*netFD, error) {
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f, err := os.Open(l.dir + "/listen")
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if err != nil {
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return nil, err
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2011-08-17 11:28:29 -06:00
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}
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var buf [16]byte
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n, err := f.Read(buf[:])
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if err != nil {
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f.Close()
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return nil, err
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}
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name := string(buf[:n])
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data, err := os.OpenFile("/net/"+l.proto+"/"+name+"/data", os.O_RDWR, 0)
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if err != nil {
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f.Close()
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return nil, err
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}
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raddr, err := readPlan9Addr(l.proto, "/net/"+l.proto+"/"+name+"/remote")
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if err != nil {
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data.Close()
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f.Close()
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return nil, err
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}
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return newFD(l.proto, name, f, data, l.laddr, raddr), nil
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2012-09-26 01:11:49 -06:00
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}
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