Merge pull request 'v1.1.0' (#2) from develop into main

Reviewed-on: #2

README.md

@@ -13,6 +13,10 @@ go get git.kor-elf.net/kor-elf-shield/blocklist
 - [Пример получения списка IP адресов от HONEYPOT](/examples/honeypot.go)
 - [Пример получения списка IP адресов от Tor](/examples/tor.go)
 - [Пример получения списка IP адресов от CIARMY](/examples/ciarmy.go)
+- [Пример получения списка IP адресов от Daniel Gerzo (BruteforceBlocker)](/examples/bruteforceblocker.go)
+- [Пример получения списка IP адресов от Blocklist.de](/examples/blocklist.go)
+- [Пример получения списка IP адресов от GreenSnow](/examples/greensnow.go)
+- [Пример получения списка IP адресов от StopForumSpam](/examples/stopforumspam.go)
 
 ## Лицензия
 

blocklist.go

@@ -1,10 +1,14 @@
 package blocklist
 
 import (
+	"archive/zip"
+	"bytes"
 	"context"
 	"fmt"
+	"io"
 	"net/http"
 	"net/url"
+	"strings"
 	"time"
 
 	"git.kor-elf.net/kor-elf-shield/blocklist/parser"
@@ -16,6 +20,12 @@ const (
 
 	// requestTimeout defines the maximum duration for request operations before timing out.
 	requestTimeout = 20 * time.Second
+
+	// maxDownloadSize defines the maximum allowed size of the downloaded file in bytes.
+	maxDownloadSize int64 = 20 << 20 // 20 MiB
+
+	// maxArchiveFileSize defines the maximum allowed size of the extracted file from ZIP in bytes.
+	maxArchiveFileSize uint64 = 50 << 20 // 50 MiB
 )
 
 // Config defines the configuration for the blocklist.
@@ -34,6 +44,17 @@ type Config struct {
 	RequestTimeout time.Duration
 }
 
+type ConfigZip struct {
+	// Config is the configuration for the blocklist.
+	Config Config
+
+	// MaxDownloadSize defines the maximum allowed size of the downloaded file in bytes.
+	MaxDownloadSize int64
+
+	// MaxArchiveFileSize defines the maximum allowed size of the extracted file from ZIP in bytes.
+	MaxArchiveFileSize uint64
+}
+
 // NewConfig creates a new Config with default values.
 // limit is the maximum number of items to process or validate. 0 means no limit.
 func NewConfig(limit uint) Config {
@@ -57,32 +78,23 @@ func NewConfigWithValidator(limit uint, validator parser.IPValidator) Config {
 	}
 }
 
+func NewConfigZip(c Config) ConfigZip {
+	return ConfigZip{
+		Config:             c,
+		MaxDownloadSize:    maxDownloadSize,
+		MaxArchiveFileSize: maxArchiveFileSize,
+	}
+}
+
 // Get fetches data from the given URL, parses the response using the provided parser, and applies the given configuration.
 // It returns the parsed IPs and any errors that occurred during the process.
 func Get(fileUrl string, parser parser.Parser, c Config) (parser.IPs, error) {
-	parsedURL, err := url.Parse(fileUrl)
-	if err != nil {
-		return nil, fmt.Errorf("invalid url: %w", err)
-	}
-	if parsedURL.Scheme != "http" && parsedURL.Scheme != "https" {
-		return nil, fmt.Errorf("invalid url scheme: %s", parsedURL.Scheme)
-	}
-
 	ctx, cancel := context.WithTimeout(context.Background(), c.ContextTimeout)
 	defer cancel()
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, fileUrl, nil)
+	res, err := fetch(fileUrl, ctx, c.RequestTimeout)
 	if err != nil {
-		return nil, fmt.Errorf("create request: %w", err)
+		return nil, err
-	}
-
-	client := &http.Client{
-		Timeout: c.RequestTimeout,
-	}
-
-	res, err := client.Do(req)
-	if err != nil {
-		return nil, fmt.Errorf("request failed: %w", err)
 	}
 	defer func() {
 		_ = res.Body.Close()
@@ -94,3 +106,229 @@ func Get(fileUrl string, parser parser.Parser, c Config) (parser.IPs, error) {
 
 	return parser.Parse(res.Body, c.Validator, c.Limit)
 }
+
+// GetSeparatedIPs fetches data from the given URL, parses the response using the provided parser, and applies the given configuration.
+// It returns the parsed IPs and any errors that occurred during the process.
+func GetSeparatedIPs(fileUrl string, parser parser.Parser, c Config) (ipV4 parser.IPs, ipV6 parser.IPs, err error) {
+	ctx, cancel := context.WithTimeout(context.Background(), c.ContextTimeout)
+	defer cancel()
+
+	res, err := fetch(fileUrl, ctx, c.RequestTimeout)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer func() {
+		_ = res.Body.Close()
+	}()
+
+	if res.StatusCode != http.StatusOK {
+		return nil, nil, fmt.Errorf("unexpected status code: %d", res.StatusCode)
+	}
+
+	return parser.ParseIPsByVersion(res.Body, c.Validator, c.Limit)
+}
+
+// GetZip fetches data from the given URL, parses the response using the provided parser, and applies the given configuration.
+// It returns the parsed IPs and any errors that occurred during the process.
+func GetZip(fileUrl string, parser parser.Parser, c ConfigZip) (parser.IPs, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), c.Config.ContextTimeout)
+	defer cancel()
+
+	res, err := fetch(fileUrl, ctx, c.Config.RequestTimeout)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		_ = res.Body.Close()
+	}()
+
+	if res.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected status code: %d", res.StatusCode)
+	}
+
+	if c.MaxDownloadSize > 0 && res.ContentLength > c.MaxDownloadSize {
+		return nil, fmt.Errorf("downloaded file is too large: content-length %d exceeds limit %d", res.ContentLength, c.MaxDownloadSize)
+	}
+
+	reader := res.Body
+	if c.MaxDownloadSize > 0 {
+		reader = io.NopCloser(io.LimitReader(res.Body, c.MaxDownloadSize+1))
+	}
+
+	body, err := io.ReadAll(reader)
+	if err != nil {
+		return nil, fmt.Errorf("read response body: %w", err)
+	}
+
+	if c.MaxDownloadSize > 0 && int64(len(body)) > c.MaxDownloadSize {
+		return nil, fmt.Errorf("downloaded file exceeds limit %d bytes", c.MaxDownloadSize)
+	}
+
+	if !isZip(body) {
+		return nil, fmt.Errorf("invalid zip archive")
+	}
+
+	return parseZip(body, parser, c)
+}
+
+// GetZipSeparatedIPs fetches data from the given URL, parses the response using the provided parser, and applies the given configuration.
+// It returns the parsed IPs and any errors that occurred during the process.
+func GetZipSeparatedIPs(fileUrl string, parser parser.Parser, c ConfigZip) (ipV4 parser.IPs, ipV6 parser.IPs, err error) {
+	ctx, cancel := context.WithTimeout(context.Background(), c.Config.ContextTimeout)
+	defer cancel()
+
+	res, err := fetch(fileUrl, ctx, c.Config.RequestTimeout)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer func() {
+		_ = res.Body.Close()
+	}()
+
+	if res.StatusCode != http.StatusOK {
+		return nil, nil, fmt.Errorf("unexpected status code: %d", res.StatusCode)
+	}
+
+	if c.MaxDownloadSize > 0 && res.ContentLength > c.MaxDownloadSize {
+		return nil, nil, fmt.Errorf("downloaded file is too large: content-length %d exceeds limit %d", res.ContentLength, c.MaxDownloadSize)
+	}
+
+	reader := res.Body
+	if c.MaxDownloadSize > 0 {
+		reader = io.NopCloser(io.LimitReader(res.Body, c.MaxDownloadSize+1))
+	}
+
+	body, err := io.ReadAll(reader)
+	if err != nil {
+		return nil, nil, fmt.Errorf("read response body: %w", err)
+	}
+
+	if c.MaxDownloadSize > 0 && int64(len(body)) > c.MaxDownloadSize {
+		return nil, nil, fmt.Errorf("downloaded file exceeds limit %d bytes", c.MaxDownloadSize)
+	}
+
+	if !isZip(body) {
+		return nil, nil, fmt.Errorf("invalid zip archive")
+	}
+
+	return parseZipSeparatedIPs(body, parser, c)
+}
+
+func isZip(body []byte) bool {
+	return len(body) >= 4 &&
+		body[0] == 'P' &&
+		body[1] == 'K' &&
+		body[2] == 0x03 &&
+		body[3] == 0x04
+}
+
+func parseZip(body []byte, p parser.Parser, c ConfigZip) (parser.IPs, error) {
+	reader, err := zip.NewReader(bytes.NewReader(body), int64(len(body)))
+	if err != nil {
+		return nil, fmt.Errorf("open zip archive: %w", err)
+	}
+
+	file := findArchiveFile(reader.File)
+	if file == nil {
+		return nil, fmt.Errorf("zip archive does not contain a supported file")
+	}
+
+	if c.MaxArchiveFileSize > 0 && file.UncompressedSize64 > c.MaxArchiveFileSize {
+		return nil, fmt.Errorf("file %q in zip is too large: %d exceeds limit %d", file.Name, file.UncompressedSize64, c.MaxArchiveFileSize)
+	}
+
+	rc, err := file.Open()
+	if err != nil {
+		return nil, fmt.Errorf("open file %q from zip: %w", file.Name, err)
+	}
+	defer func() {
+		_ = rc.Close()
+	}()
+
+	var zipReader io.Reader = rc
+	if c.MaxArchiveFileSize > 0 {
+		zipReader = io.LimitReader(rc, int64(c.MaxArchiveFileSize)+1)
+	}
+
+	return p.Parse(zipReader, c.Config.Validator, c.Config.Limit)
+}
+
+func parseZipSeparatedIPs(body []byte, p parser.Parser, c ConfigZip) (ipV4 parser.IPs, ipV6 parser.IPs, err error) {
+	reader, err := zip.NewReader(bytes.NewReader(body), int64(len(body)))
+	if err != nil {
+		return nil, nil, fmt.Errorf("open zip archive: %w", err)
+	}
+
+	file := findArchiveFile(reader.File)
+	if file == nil {
+		return nil, nil, fmt.Errorf("zip archive does not contain a supported file")
+	}
+
+	if c.MaxArchiveFileSize > 0 && file.UncompressedSize64 > c.MaxArchiveFileSize {
+		return nil, nil, fmt.Errorf("file %q in zip is too large: %d exceeds limit %d", file.Name, file.UncompressedSize64, c.MaxArchiveFileSize)
+	}
+
+	rc, err := file.Open()
+	if err != nil {
+		return nil, nil, fmt.Errorf("open file %q from zip: %w", file.Name, err)
+	}
+	defer func() {
+		_ = rc.Close()
+	}()
+
+	var zipReader io.Reader = rc
+	if c.MaxArchiveFileSize > 0 {
+		zipReader = io.LimitReader(rc, int64(c.MaxArchiveFileSize)+1)
+	}
+
+	return p.ParseIPsByVersion(zipReader, c.Config.Validator, c.Config.Limit)
+}
+
+func findArchiveFile(files []*zip.File) *zip.File {
+	var fallback *zip.File
+
+	for _, file := range files {
+		if file.FileInfo().IsDir() {
+			continue
+		}
+
+		if fallback == nil {
+			fallback = file
+		}
+
+		name := strings.ToLower(file.Name)
+		if strings.HasSuffix(name, ".txt") ||
+			strings.HasSuffix(name, ".json") ||
+			strings.HasSuffix(name, ".xml") ||
+			strings.HasSuffix(name, ".rss") {
+			return file
+		}
+	}
+
+	return fallback
+}
+
+func fetch(fileUrl string, ctx context.Context, requestTimeout time.Duration) (*http.Response, error) {
+	parsedURL, err := url.Parse(fileUrl)
+	if err != nil {
+		return nil, fmt.Errorf("invalid url: %w", err)
+	}
+	if parsedURL.Scheme != "http" && parsedURL.Scheme != "https" {
+		return nil, fmt.Errorf("invalid url scheme: %s", parsedURL.Scheme)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, fileUrl, nil)
+	if err != nil {
+		return nil, fmt.Errorf("create request: %w", err)
+	}
+
+	client := &http.Client{
+		Timeout: requestTimeout,
+	}
+
+	res, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("request failed: %w", err)
+	}
+	return res, nil
+}

examples/blocklist.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"fmt"
+
+	"git.kor-elf.net/kor-elf-shield/blocklist"
+	"git.kor-elf.net/kor-elf-shield/blocklist/parser"
+)
+
+/**
+ * An example of how to get a list of IP addresses from a service https://www.blocklist.de/en/export.html
+ */
+
+func main() {
+	// Getting a list of IP addresses that were entered in the last hour
+	// time=seconds
+	url := "https://api.blocklist.de/getlast.php?time=3600"
+	extract := parser.NewDefaultTextExtract(0, "\t")
+	pars, err := parser.NewText(extract)
+	if err != nil {
+		panic(err)
+	}
+	// limit 0 - no limit
+	limit := uint(0)
+	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
+	ips, err := blocklist.Get(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
+
+	/*
+		// This second list retrieves all the IP addresses added in the last 48 hours and is usually a
+		// very large list (over 10000 entries), so be sure that you have the resources available to use it
+		url := "http://lists.blocklist.de/lists/all.txt"
+		extract := parser.NewDefaultTextExtract(0, "\t")
+		pars, err := parser.NewText(extract)
+		if err != nil {
+			panic(err)
+		}
+		// limit 0 - no limit
+		limit := uint(0)
+		config := blocklist.NewConfig(limit)
+
+		// Get IPv4 and IPv6 addresses in one list
+		ips, err := blocklist.Get(url, pars, config)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(ips)
+
+		// Get IPv4 and IPv6 addresses in two lists
+		ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println("IPv4")
+		fmt.Println(ipsV4)
+		fmt.Println("IPv6")
+		fmt.Println(ipsV6)
+	*/
+}

examples/bruteforceblocker.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+
+	"git.kor-elf.net/kor-elf-shield/blocklist"
+	"git.kor-elf.net/kor-elf-shield/blocklist/parser"
+)
+
+/**
+ * An example of how to get a list of IP addresses from a service https://danger.rulez.sk/index.php/bruteforceblocker/
+ */
+
+func main() {
+	url := "https://danger.rulez.sk/projects/bruteforceblocker/blist.php"
+	extract := parser.NewDefaultTextExtract(0, "\t")
+	pars, err := parser.NewText(extract)
+	if err != nil {
+		panic(err)
+	}
+	// limit 0 - no limit
+	limit := uint(0)
+	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
+	ips, err := blocklist.Get(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
+}

examples/ciarmy.go

@@ -21,9 +21,21 @@ func main() {
 	// limit 0 - no limit
 	limit := uint(0)
 	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
 	ips, err := blocklist.Get(url, pars, config)
 	if err != nil {
 		panic(err)
 	}
 	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
 }

examples/dshield.go

@@ -21,12 +21,24 @@ func main() {
 	// limit 0 - no limit
 	limit := uint(0)
 	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
 	ips, err := blocklist.Get(url, pars, config)
 	if err != nil {
 		panic(err)
 	}
 	fmt.Println(ips)
 
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
+
 	/*
 		// You can also get a range of IP addresses from this service (from to)
 		url := "https://www.dshield.org/block.txt"
@@ -38,10 +50,22 @@ func main() {
 		// limit 0 - no limit
 		limit := uint(0)
 		config := blocklist.NewConfigWithValidator(limit, &parser.IPRangeValidator{})
+
+		// Get IPv4 and IPv6 addresses in one list
 		ips, err := blocklist.Get(url, pars, config)
 		if err != nil {
 			panic(err)
 		}
 		fmt.Println(ips)
+
+		// Get IPv4 and IPv6 addresses in two lists
+		ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println("IPv4")
+		fmt.Println(ipsV4)
+		fmt.Println("IPv6")
+		fmt.Println(ipsV6)
 	*/
 }

examples/greensnow.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+
+	"git.kor-elf.net/kor-elf-shield/blocklist"
+	"git.kor-elf.net/kor-elf-shield/blocklist/parser"
+)
+
+/**
+ * An example of how to get a list of IP addresses from a service https://greensnow.co/
+ */
+
+func main() {
+	url := "https://blocklist.greensnow.co/greensnow.txt"
+	extract := parser.NewDefaultTextExtract(0, " ")
+	pars, err := parser.NewText(extract)
+	if err != nil {
+		panic(err)
+	}
+	// limit 0 - no limit
+	limit := uint(0)
+	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
+	ips, err := blocklist.Get(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
+}

examples/honeypot.go

@@ -45,9 +45,21 @@ func main() {
 	// limit 0 - no limit
 	limit := uint(0)
 	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
 	ips, err := blocklist.Get(url, pars, config)
 	if err != nil {
 		panic(err)
 	}
 	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
 }

examples/spamhaus.go

@@ -32,9 +32,21 @@ func main() {
 	// limit 0 - no limit
 	limit := uint(0)
 	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
 	ips, err := blocklist.Get(url, pars, config)
 	if err != nil {
 		panic(err)
 	}
 	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
 }

examples/stopforumspam.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+
+	"git.kor-elf.net/kor-elf-shield/blocklist"
+	"git.kor-elf.net/kor-elf-shield/blocklist/parser"
+)
+
+/**
+ * An example of how to get a list of IP addresses from a service https://www.stopforumspam.com/downloads
+ */
+
+func main() {
+	url := "https://www.stopforumspam.com/downloads/listed_ip_1.zip"
+	//url := "https://www.stopforumspam.com/downloads/listed_ip_1_ipv6.zip"
+	extract := parser.NewDefaultTextExtract(0, " ")
+	pars, err := parser.NewText(extract)
+	if err != nil {
+		panic(err)
+	}
+	// limit 0 - no limit
+	limit := uint(0)
+	config := blocklist.NewConfig(limit)
+	configZip := blocklist.NewConfigZip(config)
+
+	// Get IPv4 and IPv6 addresses in one list
+	ips, err := blocklist.GetZip(url, pars, configZip)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetZipSeparatedIPs(url, pars, configZip)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
+}

examples/tor.go

@@ -21,9 +21,21 @@ func main() {
 	// limit 0 - no limit
 	limit := uint(0)
 	config := blocklist.NewConfig(limit)
+
+	// Get IPv4 and IPv6 addresses in one list
 	ips, err := blocklist.Get(url, pars, config)
 	if err != nil {
 		panic(err)
 	}
 	fmt.Println(ips)
+
+	// Get IPv4 and IPv6 addresses in two lists
+	ipsV4, ipsV6, err := blocklist.GetSeparatedIPs(url, pars, config)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("IPv4")
+	fmt.Println(ipsV4)
+	fmt.Println("IPv6")
+	fmt.Println(ipsV6)
 }

parser/json_lines.go

@@ -63,3 +63,50 @@ func (p *jsonLinesParser) Parse(body io.Reader, validator IPValidator, limit uin
 
 	return ips, nil
 }
+
+// ParseIPsByVersion parses the JSON Lines data from the given reader
+// and returns a slice of IP addresses for each IP version.
+// It also returns any errors that occurred during the process.
+func (p *jsonLinesParser) ParseIPsByVersion(body io.Reader, validator IPValidator, limit uint) (ipV4 IPs, ipV6 IPs, err error) {
+	decoder := json.NewDecoder(body)
+	ipV4 = make(IPs, 0)
+	ipV6 = make(IPs, 0)
+	for {
+		var item json.RawMessage
+		if err := decoder.Decode(&item); err != nil {
+			if err == io.EOF {
+				break
+			}
+			return nil, nil, fmt.Errorf("decode json item: %w", err)
+		}
+
+		if item == nil {
+			continue
+		}
+
+		ip, err := p.extract(item)
+		if err != nil {
+			return nil, nil, fmt.Errorf("extract ip: %w", err)
+		}
+
+		ip = strings.TrimSpace(ip)
+		isValid, ipVersion := validator.IsValidAndReturnVersion(ip)
+		if !isValid {
+			continue
+		}
+
+		if ipVersion == IPVersion4 {
+			ipV4 = append(ipV4, ip)
+		} else if ipVersion == IPVersion6 {
+			ipV6 = append(ipV6, ip)
+		} else {
+			continue
+		}
+
+		if limit > 0 && uint(len(ipV4))+uint(len(ipV6)) >= limit {
+			break
+		}
+	}
+
+	return ipV4, ipV6, nil
+}

parser/parser.go

@@ -11,14 +11,25 @@ import (
 type Parser interface {
 	// Parse reads the body and returns a slice of IP addresses.
 	Parse(body io.Reader, validator IPValidator, limit uint) (IPs, error)
+
+	ParseIPsByVersion(body io.Reader, validator IPValidator, limit uint) (ipV4 IPs, ipV6 IPs, err error)
 }
 
 // IPValidator interface defines the contract for validating IP addresses.
 type IPValidator interface {
 	// IsValid checks if the given IP address is valid.
 	IsValid(ip string) bool
+
+	IsValidAndReturnVersion(ip string) (bool, IPVersion)
 }
 
+type IPVersion int
+
+const (
+	IPVersion4 IPVersion = iota
+	IPVersion6
+)
+
 // IPs is a slice of IP addresses.
 type IPs []string
 
@@ -50,6 +61,48 @@ func (v *DefaultIPValidator) IsValid(value string) bool {
 	return false
 }
 
+// IsValidAndReturnVersion checks if the given IP address is valid and returns the IP version.
+// It returns true if the IP address is not a loopback address and the IP version is either IPv4 or IPv6.
+func (v *DefaultIPValidator) IsValidAndReturnVersion(value string) (bool, IPVersion) {
+	if value == "" {
+		return false, IPVersion4
+	}
+
+	if ip := net.ParseIP(value); ip != nil {
+		if ip.IsLoopback() {
+			return false, IPVersion4
+		}
+
+		if ip.To4() != nil {
+			return true, IPVersion4
+		}
+
+		if ip.To16() != nil {
+			return true, IPVersion6
+		}
+
+		return false, IPVersion4
+	}
+
+	if ip, _, err := net.ParseCIDR(value); err == nil {
+		if ip.IsLoopback() {
+			return false, IPVersion4
+		}
+
+		if ip.To4() != nil {
+			return true, IPVersion4
+		}
+
+		if ip.To16() != nil {
+			return true, IPVersion6
+		}
+
+		return false, IPVersion4
+	}
+
+	return false, IPVersion4
+}
+
 // IPRangeValidator implements IPValidator interface.
 // It validates IP ranges by parsing them using net.ParseIP and checking if the start and end IPs are in the same network.
 type IPRangeValidator struct{}
@@ -89,3 +142,43 @@ func (v *IPRangeValidator) IsValid(value string) bool {
 		return false
 	}
 }
+
+func (v *IPRangeValidator) IsValidAndReturnVersion(value string) (bool, IPVersion) {
+	if value == "" {
+		return false, IPVersion4
+	}
+
+	parts := strings.Split(value, "-")
+	if len(parts) != 2 {
+		return false, IPVersion4
+	}
+
+	start := net.ParseIP(strings.TrimSpace(parts[0]))
+	end := net.ParseIP(strings.TrimSpace(parts[1]))
+	if start == nil || end == nil {
+		return false, IPVersion4
+	}
+
+	start4 := start.To4()
+	end4 := end.To4()
+
+	switch {
+	case start4 != nil && end4 != nil:
+		if bytes.Compare(start4, end4) <= 0 {
+			return true, IPVersion4
+		}
+		return false, IPVersion4
+	case start4 == nil && end4 == nil:
+		start16 := start.To16()
+		end16 := end.To16()
+		if start16 == nil || end16 == nil {
+			return false, IPVersion4
+		}
+		if bytes.Compare(start16, end16) <= 0 {
+			return true, IPVersion6
+		}
+		return false, IPVersion4
+	default:
+		return false, IPVersion4
+	}
+}

parser/rss.go

@@ -66,3 +66,53 @@ func (p *rssParser) Parse(body io.Reader, validator IPValidator, limit uint) (IP
 
 	return ips, nil
 }
+
+// ParseIPsByVersion parses the RSS data from the given reader
+// and returns a slice of IP addresses for each IP version.
+// It also returns any errors that occurred during the process.
+func (p *rssParser) ParseIPsByVersion(body io.Reader, validator IPValidator, limit uint) (ipV4 IPs, ipV6 IPs, err error) {
+	decoder := xml.NewDecoder(body)
+	ipV4 = make(IPs, 0)
+	ipV6 = make(IPs, 0)
+
+	for {
+		token, err := decoder.Token()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+
+			return nil, nil, fmt.Errorf("parse rss: %w", err)
+		}
+
+		start, ok := token.(xml.StartElement)
+		if !ok {
+			continue
+		}
+
+		ip, err := p.extract(decoder, start)
+		if err != nil {
+			return nil, nil, fmt.Errorf("extract rss ip: %w", err)
+		}
+
+		ip = strings.TrimSpace(ip)
+		isValid, ipVersion := validator.IsValidAndReturnVersion(ip)
+		if !isValid {
+			continue
+		}
+
+		if ipVersion == IPVersion4 {
+			ipV4 = append(ipV4, ip)
+		} else if ipVersion == IPVersion6 {
+			ipV6 = append(ipV6, ip)
+		} else {
+			continue
+		}
+
+		if limit > 0 && uint(len(ipV4))+uint(len(ipV6)) >= limit {
+			break
+		}
+	}
+
+	return ipV4, ipV6, nil
+}

parser/text.go

@@ -158,3 +158,49 @@ func (p *textParser) Parse(body io.Reader, validator IPValidator, limit uint) (I
 
 	return ips, nil
 }
+
+func (p *textParser) ParseIPsByVersion(body io.Reader, validator IPValidator, limit uint) (ipV4 IPs, ipV6 IPs, err error) {
+	ipV4 = make(IPs, 0)
+	ipV6 = make(IPs, 0)
+
+	scanner := bufio.NewScanner(body)
+
+	buf := make([]byte, 0, 64*1024)
+	scanner.Buffer(buf, 1024*1024)
+
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || strings.HasPrefix(line, ";") || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		ip, isFound := p.textExtract.Extract(line)
+		if !isFound {
+			continue
+		}
+
+		ip = strings.TrimSpace(ip)
+		isValid, ipVersion := validator.IsValidAndReturnVersion(ip)
+		if !isValid {
+			continue
+		}
+
+		if ipVersion == IPVersion4 {
+			ipV4 = append(ipV4, ip)
+		} else if ipVersion == IPVersion6 {
+			ipV6 = append(ipV6, ip)
+		} else {
+			continue
+		}
+
+		if limit > 0 && uint(len(ipV4))+uint(len(ipV6)) >= limit {
+			break
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, nil, fmt.Errorf("read response: %w", err)
+	}
+
+	return ipV4, ipV6, nil
+}