mirror of
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake.git
synced 2025-10-13 20:11:19 -04:00
Use tpo geoip library
Now the geoip implmentation has being moved to it's own library to be shared between projects.
This commit is contained in:
meskio
parent
8c6f0dbae7
commit
4396d505a3
5 changed files with 13 additions and 364 deletions
240
broker/geoip.go
240
broker/geoip.go
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@ -1,240 +0,0 @@
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/*
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This code is for loading database data that maps ip addresses to countries
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for collecting and presenting statistics on snowflake use that might alert us
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to censorship events.
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The functions here are heavily based off of how tor maintains and searches their
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geoip database
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The tables used for geoip data must be structured as follows:
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Recognized line format for IPv4 is:
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INTIPLOW,INTIPHIGH,CC
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where INTIPLOW and INTIPHIGH are IPv4 addresses encoded as big-endian 4-byte unsigned
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integers, and CC is a country code.
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Note that the IPv4 line format
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"INTIPLOW","INTIPHIGH","CC","CC3","COUNTRY NAME"
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is not currently supported.
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Recognized line format for IPv6 is:
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IPV6LOW,IPV6HIGH,CC
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where IPV6LOW and IPV6HIGH are IPv6 addresses and CC is a country code.
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It also recognizes, and skips over, blank lines and lines that start
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with '#' (comments).
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*/
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package main
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import (
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"bufio"
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"bytes"
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"crypto/sha1"
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"encoding/hex"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"sort"
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"strconv"
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"strings"
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"sync"
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)
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type GeoIPTable interface {
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parseEntry(string) (*GeoIPEntry, error)
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Len() int
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Append(GeoIPEntry)
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ElementAt(int) GeoIPEntry
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Lock()
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Unlock()
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}
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type GeoIPEntry struct {
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ipLow net.IP
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ipHigh net.IP
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country string
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}
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type GeoIPv4Table struct {
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table []GeoIPEntry
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lock sync.Mutex // synchronization for geoip table accesses and reloads
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}
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type GeoIPv6Table struct {
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table []GeoIPEntry
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lock sync.Mutex // synchronization for geoip table accesses and reloads
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}
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func (table *GeoIPv4Table) Len() int { return len(table.table) }
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func (table *GeoIPv6Table) Len() int { return len(table.table) }
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func (table *GeoIPv4Table) Append(entry GeoIPEntry) {
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(*table).table = append(table.table, entry)
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}
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func (table *GeoIPv6Table) Append(entry GeoIPEntry) {
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(*table).table = append(table.table, entry)
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}
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func (table *GeoIPv4Table) ElementAt(i int) GeoIPEntry { return table.table[i] }
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func (table *GeoIPv6Table) ElementAt(i int) GeoIPEntry { return table.table[i] }
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func (table *GeoIPv4Table) Lock() { (*table).lock.Lock() }
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func (table *GeoIPv6Table) Lock() { (*table).lock.Lock() }
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func (table *GeoIPv4Table) Unlock() { (*table).lock.Unlock() }
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func (table *GeoIPv6Table) Unlock() { (*table).lock.Unlock() }
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// Convert a geoip IP address represented as a big-endian unsigned integer to net.IP
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func geoipStringToIP(ipStr string) (net.IP, error) {
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ip, err := strconv.ParseUint(ipStr, 10, 32)
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if err != nil {
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return net.IPv4(0, 0, 0, 0), fmt.Errorf("error parsing IP %s", ipStr)
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}
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var bytes [4]byte
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bytes[0] = byte(ip & 0xFF)
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bytes[1] = byte((ip >> 8) & 0xFF)
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bytes[2] = byte((ip >> 16) & 0xFF)
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bytes[3] = byte((ip >> 24) & 0xFF)
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return net.IPv4(bytes[3], bytes[2], bytes[1], bytes[0]), nil
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}
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//Parses a line in the provided geoip file that corresponds
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//to an address range and a two character country code
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func (table *GeoIPv4Table) parseEntry(candidate string) (*GeoIPEntry, error) {
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if candidate[0] == '#' {
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return nil, nil
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}
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parsedCandidate := strings.Split(candidate, ",")
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if len(parsedCandidate) != 3 {
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return nil, fmt.Errorf("provided geoip file is incorrectly formatted. Could not parse line:\n%s", parsedCandidate)
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}
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low, err := geoipStringToIP(parsedCandidate[0])
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if err != nil {
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return nil, err
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}
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high, err := geoipStringToIP(parsedCandidate[1])
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if err != nil {
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return nil, err
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}
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geoipEntry := &GeoIPEntry{
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ipLow: low,
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ipHigh: high,
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country: parsedCandidate[2],
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}
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return geoipEntry, nil
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}
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//Parses a line in the provided geoip file that corresponds
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//to an address range and a two character country code
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func (table *GeoIPv6Table) parseEntry(candidate string) (*GeoIPEntry, error) {
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if candidate[0] == '#' {
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return nil, nil
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}
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parsedCandidate := strings.Split(candidate, ",")
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if len(parsedCandidate) != 3 {
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return nil, fmt.Errorf("")
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}
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low := net.ParseIP(parsedCandidate[0])
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if low == nil {
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return nil, fmt.Errorf("")
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}
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high := net.ParseIP(parsedCandidate[1])
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if high == nil {
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return nil, fmt.Errorf("")
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}
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geoipEntry := &GeoIPEntry{
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ipLow: low,
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ipHigh: high,
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country: parsedCandidate[2],
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}
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return geoipEntry, nil
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}
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//Loads provided geoip file into our tables
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//Entries are stored in a table
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func GeoIPLoadFile(table GeoIPTable, pathname string) error {
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//open file
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geoipFile, err := os.Open(pathname)
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if err != nil {
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return err
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}
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defer geoipFile.Close()
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hash := sha1.New()
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table.Lock()
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defer table.Unlock()
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hashedFile := io.TeeReader(geoipFile, hash)
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//read in strings and call parse function
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scanner := bufio.NewScanner(hashedFile)
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for scanner.Scan() {
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entry, err := table.parseEntry(scanner.Text())
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if err != nil {
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return fmt.Errorf("provided geoip file is incorrectly formatted. Line is: %+q", scanner.Text())
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}
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if entry != nil {
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table.Append(*entry)
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}
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}
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if err := scanner.Err(); err != nil {
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return err
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}
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sha1Hash := hex.EncodeToString(hash.Sum(nil))
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log.Println("Using geoip file ", pathname, " with checksum", sha1Hash)
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log.Println("Loaded ", table.Len(), " entries into table")
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return nil
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}
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//Returns the country location of an IPv4 or IPv6 address, and a boolean value
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//that indicates whether the IP address was present in the geoip database
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func GetCountryByAddr(table GeoIPTable, ip net.IP) (string, bool) {
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table.Lock()
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defer table.Unlock()
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//look IP up in database
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index := sort.Search(table.Len(), func(i int) bool {
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entry := table.ElementAt(i)
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return (bytes.Compare(ip.To16(), entry.ipHigh.To16()) <= 0)
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})
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if index == table.Len() {
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return "", false
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}
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// check to see if addr is in the range specified by the returned index
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// search on IPs in invalid ranges (e.g., 127.0.0.0/8) will return the
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//country code of the next highest range
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entry := table.ElementAt(index)
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if !(bytes.Compare(ip.To16(), entry.ipLow.To16()) >= 0 &&
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bytes.Compare(ip.To16(), entry.ipHigh.To16()) <= 0) {
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return "", false
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}
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return table.ElementAt(index).country, true
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}
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@ -15,6 +15,7 @@ import (
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"time"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus"
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"gitlab.torproject.org/tpo/anti-censorship/geoip"
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)
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)
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const (
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const (
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@ -38,8 +39,7 @@ type CountryStats struct {
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// Implements Observable
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// Implements Observable
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type Metrics struct {
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type Metrics struct {
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logger *log.Logger
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logger *log.Logger
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tablev4 *GeoIPv4Table
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geoipdb *geoip.Geoip
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tablev6 *GeoIPv6Table
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countryStats CountryStats
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countryStats CountryStats
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clientRoundtripEstimate time.Duration
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clientRoundtripEstimate time.Duration
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@ -115,19 +115,10 @@ func (m *Metrics) UpdateCountryStats(addr string, proxyType string, natType stri
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}
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}
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ip := net.ParseIP(addr)
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ip := net.ParseIP(addr)
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if ip.To4() != nil {
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if m.geoipdb == nil {
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//This is an IPv4 address
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if m.tablev4 == nil {
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return
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return
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}
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}
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country, ok = GetCountryByAddr(m.tablev4, ip)
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country, ok = m.geoipdb.GetCountryByAddr(ip)
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} else {
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if m.tablev6 == nil {
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return
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}
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country, ok = GetCountryByAddr(m.tablev6, ip)
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}
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if !ok {
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if !ok {
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country = "??"
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country = "??"
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}
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}
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@ -164,24 +155,11 @@ func (m *Metrics) UpdateCountryStats(addr string, proxyType string, natType stri
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func (m *Metrics) LoadGeoipDatabases(geoipDB string, geoip6DB string) error {
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func (m *Metrics) LoadGeoipDatabases(geoipDB string, geoip6DB string) error {
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// Load geoip databases
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// Load geoip databases
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var err error
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log.Println("Loading geoip databases")
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log.Println("Loading geoip databases")
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tablev4 := new(GeoIPv4Table)
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m.geoipdb, err = geoip.New(geoipDB, geoip6DB)
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err := GeoIPLoadFile(tablev4, geoipDB)
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if err != nil {
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m.tablev4 = nil
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return err
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return err
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}
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}
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m.tablev4 = tablev4
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tablev6 := new(GeoIPv6Table)
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err = GeoIPLoadFile(tablev6, geoip6DB)
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if err != nil {
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m.tablev6 = nil
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return err
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}
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m.tablev6 = tablev6
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return nil
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}
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func NewMetrics(metricsLogger *log.Logger) (*Metrics, error) {
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func NewMetrics(metricsLogger *log.Logger) (*Metrics, error) {
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m := new(Metrics)
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m := new(Metrics)
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@ -6,7 +6,6 @@ import (
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"io"
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"io"
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"io/ioutil"
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"io/ioutil"
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"log"
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"log"
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"net"
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"net/http"
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"net/http"
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"net/http/httptest"
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"net/http/httptest"
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"os"
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"os"
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@ -473,106 +472,15 @@ func TestSnowflakeHeap(t *testing.T) {
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})
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})
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}
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}
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func TestGeoip(t *testing.T) {
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func TestInvalidGeoipFile(t *testing.T) {
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Convey("Geoip", t, func() {
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Convey("Geoip", t, func() {
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tv4 := new(GeoIPv4Table)
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err := GeoIPLoadFile(tv4, "test_geoip")
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So(err, ShouldEqual, nil)
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tv6 := new(GeoIPv6Table)
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err = GeoIPLoadFile(tv6, "test_geoip6")
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So(err, ShouldEqual, nil)
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Convey("IPv4 Country Mapping Tests", func() {
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for _, test := range []struct {
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addr, cc string
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ok bool
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}{
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{
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"129.97.208.23", //uwaterloo
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"CA",
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true,
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},
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{
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"127.0.0.1",
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"",
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false,
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},
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{
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"255.255.255.255",
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"",
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false,
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},
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{
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"0.0.0.0",
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"",
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false,
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},
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{
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"223.252.127.255", //test high end of range
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"JP",
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true,
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},
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{
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"223.252.127.255", //test low end of range
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"JP",
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true,
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},
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} {
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country, ok := GetCountryByAddr(tv4, net.ParseIP(test.addr))
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So(country, ShouldEqual, test.cc)
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So(ok, ShouldResemble, test.ok)
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}
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})
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Convey("IPv6 Country Mapping Tests", func() {
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for _, test := range []struct {
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addr, cc string
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ok bool
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}{
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{
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"2620:101:f000:0:250:56ff:fe80:168e", //uwaterloo
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"CA",
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true,
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},
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{
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"fd00:0:0:0:0:0:0:1",
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"",
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false,
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},
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{
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"0:0:0:0:0:0:0:0",
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"",
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false,
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},
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{
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"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
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"",
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false,
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},
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{
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|
||||||
"2a07:2e47:ffff:ffff:ffff:ffff:ffff:ffff", //test high end of range
|
|
||||||
"FR",
|
|
||||||
true,
|
|
||||||
},
|
|
||||||
{
|
|
||||||
"2a07:2e40::", //test low end of range
|
|
||||||
"FR",
|
|
||||||
true,
|
|
||||||
},
|
|
||||||
} {
|
|
||||||
country, ok := GetCountryByAddr(tv6, net.ParseIP(test.addr))
|
|
||||||
So(country, ShouldEqual, test.cc)
|
|
||||||
So(ok, ShouldResemble, test.ok)
|
|
||||||
}
|
|
||||||
})
|
|
||||||
|
|
||||||
// Make sure things behave properly if geoip file fails to load
|
// Make sure things behave properly if geoip file fails to load
|
||||||
ctx := NewBrokerContext(NullLogger())
|
ctx := NewBrokerContext(NullLogger())
|
||||||
if err := ctx.metrics.LoadGeoipDatabases("invalid_filename", "invalid_filename6"); err != nil {
|
if err := ctx.metrics.LoadGeoipDatabases("invalid_filename", "invalid_filename6"); err != nil {
|
||||||
log.Printf("loading geo ip databases returned error: %v", err)
|
log.Printf("loading geo ip databases returned error: %v", err)
|
||||||
}
|
}
|
||||||
ctx.metrics.UpdateCountryStats("127.0.0.1", "", NATUnrestricted)
|
ctx.metrics.UpdateCountryStats("127.0.0.1", "", NATUnrestricted)
|
||||||
So(ctx.metrics.tablev4, ShouldEqual, nil)
|
So(ctx.metrics.geoipdb, ShouldEqual, nil)
|
||||||
|
|
||||||
})
|
})
|
||||||
}
|
}
|
||||||
|
|
|
||||||
1
go.mod
1
go.mod
|
|
@ -16,6 +16,7 @@ require (
|
||||||
github.com/smartystreets/goconvey v1.6.4
|
github.com/smartystreets/goconvey v1.6.4
|
||||||
github.com/xtaci/kcp-go/v5 v5.6.1
|
github.com/xtaci/kcp-go/v5 v5.6.1
|
||||||
github.com/xtaci/smux v1.5.15
|
github.com/xtaci/smux v1.5.15
|
||||||
|
gitlab.torproject.org/tpo/anti-censorship/geoip v0.0.0-20210928150955-7ce4b3d98d01
|
||||||
golang.org/x/crypto v0.0.0-20210317152858-513c2a44f670
|
golang.org/x/crypto v0.0.0-20210317152858-513c2a44f670
|
||||||
golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4
|
golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4
|
||||||
golang.org/x/sys v0.0.0-20210317225723-c4fcb01b228e // indirect
|
golang.org/x/sys v0.0.0-20210317225723-c4fcb01b228e // indirect
|
||||||
|
|
|
||||||
2
go.sum
2
go.sum
|
|
@ -358,6 +358,8 @@ github.com/xtaci/smux v1.5.15 h1:6hMiXswcleXj5oNfcJc+DXS8Vj36XX2LaX98udog6Kc=
|
||||||
github.com/xtaci/smux v1.5.15/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
|
github.com/xtaci/smux v1.5.15/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
|
||||||
github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
|
github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
|
||||||
github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
|
github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
|
||||||
|
gitlab.torproject.org/tpo/anti-censorship/geoip v0.0.0-20210928150955-7ce4b3d98d01 h1:4949mHh9Vj2/okk48yG8nhP6TosFWOUfSfSr502sKGE=
|
||||||
|
gitlab.torproject.org/tpo/anti-censorship/geoip v0.0.0-20210928150955-7ce4b3d98d01/go.mod h1:K3LOI4H8fa6j+7E10ViHeGEQV10304FG4j94ypmKLjY=
|
||||||
go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
|
go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
|
||||||
go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
|
go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
|
||||||
go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
|
go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue