mirror of
https://gitlab.com/ric_harvey/MailHog.git
synced 2024-11-28 00:34:04 +00:00
131 lines
2.7 KiB
Go
131 lines
2.7 KiB
Go
package smtp
|
|
|
|
// http://www.rfc-editor.org/rfc/rfc5321.txt
|
|
|
|
import (
|
|
"log"
|
|
"net"
|
|
"strings"
|
|
"github.com/ian-kent/MailHog/mailhog"
|
|
)
|
|
|
|
type Session struct {
|
|
conn *net.TCPConn
|
|
line string
|
|
conf *mailhog.Config
|
|
state int
|
|
}
|
|
|
|
const (
|
|
ESTABLISH = iota
|
|
MAIL
|
|
RCPT
|
|
DATA
|
|
)
|
|
|
|
type Message struct {
|
|
From string
|
|
To string
|
|
Data []byte
|
|
Helo string
|
|
}
|
|
|
|
func StartSession(conn *net.TCPConn, conf *mailhog.Config) {
|
|
conv := &Session{conn, "", conf, ESTABLISH}
|
|
conv.log("Starting session")
|
|
conv.Write("220", "Go-MailHog")
|
|
conv.Read()
|
|
}
|
|
|
|
func (c *Session) log(message string, args ...interface{}) {
|
|
message = strings.Join([]string{"[%s, %d]", message}, " ")
|
|
args = append([]interface{}{c.conn.RemoteAddr(), c.state}, args...)
|
|
log.Printf(message, args...)
|
|
}
|
|
|
|
func (c *Session) Read() {
|
|
buf := make([]byte, 1024)
|
|
n, err := c.conn.Read(buf)
|
|
|
|
if n == 0 {
|
|
c.log("Connection closed by remote host\n")
|
|
return
|
|
}
|
|
if err != nil {
|
|
c.log("Error reading from socket: %s\n", err)
|
|
return
|
|
}
|
|
|
|
text := string(buf[0:n])
|
|
c.log("Received %d bytes: '%s'\n", n, text)
|
|
|
|
c.line += text
|
|
|
|
c.Parse()
|
|
}
|
|
|
|
func (c *Session) Parse() {
|
|
for strings.Contains(c.line, "\n") {
|
|
parts := strings.SplitN(c.line, "\n", 2)
|
|
if len(parts) == 2 {
|
|
c.line = parts[1]
|
|
} else {
|
|
c.line = ""
|
|
}
|
|
c.Process(strings.Trim(parts[0], "\r\n"))
|
|
}
|
|
|
|
c.Read()
|
|
}
|
|
|
|
func (c *Session) Write(code string, text ...string) {
|
|
if len(text) == 1 {
|
|
c.conn.Write([]byte(code + " " + text[0] + "\n"))
|
|
return
|
|
}
|
|
for i := 0; i < len(text) - 2; i++ {
|
|
c.conn.Write([]byte(code + "-" + text[i] + "\n"))
|
|
}
|
|
c.conn.Write([]byte(code + " " + text[len(text)] + "\n"))
|
|
}
|
|
|
|
func (c *Session) Process(line string) {
|
|
c.log("Processing line: %s", line)
|
|
|
|
words := strings.Split(line, " ")
|
|
command := words[0]
|
|
c.log("In state %d, got command '%s'", c.state, command)
|
|
|
|
switch {
|
|
case command == "RSET":
|
|
c.log("Got RSET command, switching to ESTABLISH state")
|
|
c.state = ESTABLISH
|
|
c.Write("250", "OK")
|
|
case command == "NOOP":
|
|
c.log("Got NOOP command")
|
|
c.Write("250", "OK")
|
|
case command == "QUIT":
|
|
c.log("Got QUIT command")
|
|
c.Write("221", "OK")
|
|
case c.state == ESTABLISH:
|
|
switch command {
|
|
case "HELO":
|
|
c.log("Got HELO command, switching to MAIL state")
|
|
c.state = MAIL
|
|
c.Write("250", "HELO " + c.conf.Hostname)
|
|
case "EHLO":
|
|
c.log("Got EHLO command, switching to MAIL state")
|
|
c.state = MAIL
|
|
c.Write("250", "EHLO " + c.conf.Hostname)
|
|
default:
|
|
c.log("Got unknown command for ESTABLISH state: '%s'", command)
|
|
}
|
|
case c.state == MAIL:
|
|
switch command {
|
|
case "MAIL":
|
|
c.log("Got MAIL command")
|
|
default:
|
|
c.log("Got unknown command for MAIL state: '%s'", command)
|
|
}
|
|
}
|
|
}
|