bagas
8442fedef1
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386 lines
10 KiB
Go
386 lines
10 KiB
Go
package session
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import (
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"bytes"
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"fmt"
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"io"
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"log"
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"strings"
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"time"
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"tunnel_pls/utils"
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"golang.org/x/crypto/ssh"
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)
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func (i *Interaction) SendMessage(message string) {
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if i.channel != nil {
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_, err := i.channel.Write([]byte(message))
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if err != nil && err != io.EOF {
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log.Printf("Error writing to channel: %v", err)
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return
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}
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}
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}
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func (i *Interaction) HandleUserInput() {
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var commandBuffer bytes.Buffer
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buf := make([]byte, 1)
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i.EditMode = false
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for {
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n, err := i.channel.Read(buf)
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if err != nil {
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if err != io.EOF {
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log.Printf("Error reading from client: %s", err)
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}
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break
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}
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if n > 0 {
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char := buf[0]
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if i.EditMode {
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i.HandleSlugEditMode(i.channel, char, &commandBuffer)
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continue
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}
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i.SendMessage(string(buf[:n]))
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if char == 8 || char == 127 {
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if commandBuffer.Len() > 0 {
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commandBuffer.Truncate(commandBuffer.Len() - 1)
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i.SendMessage("\b \b")
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}
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continue
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}
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if char == '/' {
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commandBuffer.Reset()
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commandBuffer.WriteByte(char)
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continue
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}
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if commandBuffer.Len() > 0 {
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if char == 13 {
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i.HandleCommand(commandBuffer.String(), &commandBuffer)
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continue
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}
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commandBuffer.WriteByte(char)
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}
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}
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}
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}
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func (i *Interaction) HandleSlugEditMode(connection ssh.Channel, char byte, commandBuffer *bytes.Buffer) {
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if char == 13 {
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i.HandleSlugSave(connection)
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} else if char == 27 {
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i.HandleSlugCancel(connection, commandBuffer)
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} else if char == 8 || char == 127 {
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if len(i.EditSlug) > 0 {
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i.EditSlug = (i.EditSlug)[:len(i.EditSlug)-1]
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_, err := connection.Write([]byte("\r\033[K"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("➤ " + i.EditSlug + "." + utils.Getenv("domain")))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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}
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} else if char >= 32 && char <= 126 {
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if (char >= 'a' && char <= 'z') || (char >= '0' && char <= '9') || char == '-' {
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i.EditSlug += string(char)
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_, err := connection.Write([]byte("\r\033[K"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("➤ " + i.EditSlug + "." + utils.Getenv("domain")))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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}
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}
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}
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func (i *Interaction) HandleSlugSave(connection ssh.Channel) {
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isValid := isValidSlug(i.EditSlug)
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_, err := connection.Write([]byte("\033[H\033[2J"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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if isValid {
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oldSlug := i.getSlug()
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newSlug := i.EditSlug
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if !updateClientSlug(oldSlug, newSlug) {
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i.HandleSlugUpdateError()
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return
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}
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_, err := connection.Write([]byte("\r\n\r\n✅ SUBDOMAIN UPDATED ✅\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Your new address is: " + newSlug + "." + utils.Getenv("domain") + "\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Press any key to continue...\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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} else if isForbiddenSlug(i.EditSlug) {
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_, err := connection.Write([]byte("\r\n\r\n❌ FORBIDDEN SUBDOMAIN ❌\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("This subdomain is not allowed.\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Please try a different subdomain.\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Press any key to continue...\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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} else {
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_, err := connection.Write([]byte("\r\n\r\n❌ INVALID SUBDOMAIN ❌\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Use only lowercase letters, numbers, and hyphens.\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Length must be 3-20 characters and cannot start or end with a hyphen.\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Press any key to continue...\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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}
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waitForKeyPress(connection)
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_, err = connection.Write([]byte("\033[H\033[2J"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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i.ShowWelcomeMessage()
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domain := utils.Getenv("domain")
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protocol := "http"
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if utils.Getenv("tls_enabled") == "true" {
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protocol = "https"
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}
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_, err = connection.Write([]byte(fmt.Sprintf("Forwarding your traffic to %s://%s.%s \r\n", protocol, i.getSlug(), domain)))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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i.EditMode = false
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i.CommandBuffer.Reset()
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}
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func (i *Interaction) HandleSlugCancel(connection ssh.Channel, commandBuffer *bytes.Buffer) {
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i.EditMode = false
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_, err := connection.Write([]byte("\033[H\033[2J"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("\r\n\r\n⚠️ SUBDOMAIN EDIT CANCELLED ⚠️\r\n\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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_, err = connection.Write([]byte("Press any key to continue...\r\n"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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waitForKeyPress(connection)
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_, err = connection.Write([]byte("\033[H\033[2J"))
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if err != nil {
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log.Printf("failed to write to channel: %v", err)
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return
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}
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i.ShowWelcomeMessage()
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commandBuffer.Reset()
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}
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func (i *Interaction) HandleSlugUpdateError() {
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i.SendMessage("\r\n\r\n❌ SERVER ERROR ❌\r\n\r\n")
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i.SendMessage("Failed to update subdomain. You will be disconnected in 5 seconds.\r\n\r\n")
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for iter := 5; iter > 0; iter-- {
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i.SendMessage(fmt.Sprintf("Disconnecting in %d...\r\n", iter))
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time.Sleep(1 * time.Second)
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}
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err := i.session.Close()
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if err != nil {
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log.Printf("failed to close session: %v", err)
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return
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}
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}
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func (i *Interaction) HandleCommand(command string, commandBuffer *bytes.Buffer) {
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switch command {
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case "/bye":
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i.SendMessage("\r\nClosing connection...")
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err := i.session.Close()
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if err != nil {
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log.Printf("failed to close session: %v", err)
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return
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}
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return
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case "/help":
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i.SendMessage("\r\nAvailable commands: /bye, /help, /clear, /slug")
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case "/clear":
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i.SendMessage("\033[H\033[2J")
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i.ShowWelcomeMessage()
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domain := utils.Getenv("domain")
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if i.forwarder.GetTunnelType() == HTTP {
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protocol := "http"
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if utils.Getenv("tls_enabled") == "true" {
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protocol = "https"
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}
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i.SendMessage(fmt.Sprintf("Forwarding your traffic to %s://%s.%s \r\n", protocol, i.getSlug(), domain))
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} else {
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i.SendMessage(fmt.Sprintf("Forwarding your traffic to %s://%s:%d \r\n", i.forwarder.GetTunnelType(), domain, i.forwarder.GetForwardedPort()))
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}
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case "/slug":
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if i.forwarder.GetTunnelType() != HTTP {
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i.SendMessage((fmt.Sprintf("\r\n%s tunnels cannot have custom subdomains", i.forwarder.GetTunnelType())))
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} else {
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i.EditMode = true
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i.EditSlug = i.getSlug()
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i.SendMessage("\033[H\033[2J")
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i.DisplaySlugEditor()
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i.SendMessage("➤ " + i.EditSlug + "." + utils.Getenv("domain"))
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}
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default:
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i.SendMessage("Unknown command")
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}
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commandBuffer.Reset()
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}
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func (i *Interaction) ShowWelcomeMessage() {
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asciiArt := []string{
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` _______ _ _____ _ `,
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`|__ __| | | | __ \| | `,
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` | |_ _ _ __ _ __ ___| | | |__) | |___ `,
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` | | | | | '_ \| '_ \ / _ \ | | ___/| / __|`,
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` | | |_| | | | | | | | __/ | | | | \__ \`,
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` |_|\__,_|_| |_|_| |_|\___|_| |_| |_|___/`,
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``,
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` "Tunnel Pls" - Project by Bagas`,
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` https://fossy.my.id`,
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``,
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` Welcome to Tunnel! Available commands:`,
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` - '/bye' : Exit the tunnel`,
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` - '/help' : Show this help message`,
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` - '/clear' : Clear the current line`,
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` - '/slug' : Set custom subdomain`,
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}
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for _, line := range asciiArt {
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i.SendMessage("\r\n" + line)
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}
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i.SendMessage("\r\n\r\n")
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}
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func (i *Interaction) DisplaySlugEditor() {
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domain := utils.Getenv("domain")
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fullDomain := i.getSlug() + "." + domain
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const paddingRight = 4
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contentLine := " ║ Current: " + fullDomain
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boxWidth := len(contentLine) + paddingRight + 1
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if boxWidth < 50 {
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boxWidth = 50
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}
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topBorder := " ╔" + strings.Repeat("═", boxWidth-4) + "╗\r\n"
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title := centerText("SUBDOMAIN EDITOR", boxWidth-4)
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header := " ║" + title + "║\r\n"
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midBorder := " ╠" + strings.Repeat("═", boxWidth-4) + "╣\r\n"
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emptyLine := " ║" + strings.Repeat(" ", boxWidth-4) + "║\r\n"
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currentLineContent := fmt.Sprintf(" ║ Current: %s", fullDomain)
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currentLine := currentLineContent + strings.Repeat(" ", boxWidth-len(currentLineContent)+1) + "║\r\n"
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saveCancel := " ║ [Enter] Save | [Esc] Cancel" + strings.Repeat(" ", boxWidth-35) + "║\r\n"
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bottomBorder := " ╚" + strings.Repeat("═", boxWidth-4) + "╝\r\n"
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i.SendMessage("\r\n\r\n")
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i.SendMessage(topBorder)
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i.SendMessage(header)
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i.SendMessage(midBorder)
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i.SendMessage(emptyLine)
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i.SendMessage(currentLine)
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i.SendMessage(emptyLine)
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i.SendMessage(emptyLine)
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i.SendMessage(midBorder)
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i.SendMessage(saveCancel)
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i.SendMessage(bottomBorder)
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i.SendMessage("\r\n\r\n")
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}
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func updateClientSlug(oldSlug, newSlug string) bool {
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clientsMutex.Lock()
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defer clientsMutex.Unlock()
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if _, exists := Clients[newSlug]; exists && newSlug != oldSlug {
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return false
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}
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client, ok := Clients[oldSlug]
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if !ok {
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return false
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}
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delete(Clients, oldSlug)
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client.forwarder.setSlug(newSlug)
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Clients[newSlug] = client
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return true
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}
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func centerText(text string, width int) string {
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padding := (width - len(text)) / 2
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if padding < 0 {
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padding = 0
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}
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return strings.Repeat(" ", padding) + text + strings.Repeat(" ", width-len(text)-padding)
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}
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