func main() {
log.SetSeverities(log.INFO | log.WARN)
log.Info("Severity: will print info.")
log.Warn("Severity: will print warn.")
log.Debug("Severity: won't print debug.")
log.SetMinMaxSeverity(log.TRACE, log.INFO)
log.Trace("Severity: will print trace.")
log.Debug("Severity: will print debug.")
log.Info("Severity: will print info.")
log.Warn("Severity: won't print warn.")
}
func StartServer(config *Config) {
err := initDB(config)
if err != nil {
log.Critical(err)
panic(err)
}
queue = make(chan int, runtime.NumCPU())
listen, err := net.Listen("tcp", config.Listen)
if err != nil {
log.Critical(err)
panic(err)
}
greeting = fmt.Sprintf("220 %s SMTP ANONMAIL\r\n", config.Name)
saveMailChannel := make(chan *ServerMessage, 10)
go SaveMail(saveMailChannel)
for {
con, err := listen.Accept()
if err != nil {
log.Critical("Error accepting connection", err)
}
log.Debug("New Connection: ", con.RemoteAddr().String())
NewClient := &Client{
server: config.Name,
conn: con,
address: con.RemoteAddr().String(),
time: time.Now().Unix(),
reader: bufio.NewReader(con),
writer: bufio.NewWriter(con),
message: &ServerMessage{},
}
queue <- 0
go NewClient.HandleMessage(saveMailChannel)
}
}
func (c *Client) HandleMessage(save chan *ServerMessage) {
defer c.closeClient()
c.Write(greeting)
for {
data, err := c.readMessage()
if err != nil {
//This means the client has quit, or there's an error.
break
}
log.Debug("Recieved: ", data)
line := command(string(data))
if !line.IsValid() {
c.Write("500 Invalid Data\r\n")
}
switch line.Action() {
case "HELO":
c.HandleHelo(line)
case "EHLO":
c.HandleEhlo(line)
case "RSET":
c.message = &ServerMessage{}
c.Write("250 2.0.0 OK\r\n")
case "MAIL":
c.HandleMailFrom(line)
case "RCPT":
c.HandleRCPT(line)
case "DATA":
c.HandleMail(line)
case "NOOP":
c.Write("250 2.0.0 OK\r\n")
case "QUIT":
c.Write("221 2.0.0 Bye\r\n")
default:
c.Write("502 5.5.2 Error: Command Not Recognized\r\n")
}
if c.message.IsValid() {
save <- c.message
}
}
}
func (c *Client) Write(line string) {
log.Debug("Writing ", line)
c.writer.WriteString(line)
c.writer.Flush()
}