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package smtp_test
import (
"bufio"
"errors"
"io"
"net"
"strings"
"testing"
"github.com/emersion/go-smtp"
)
func testServerGreetedLMTP(t *testing.T, fn ...serverConfigureFunc) (be *backend, s *smtp.Server, c net.Conn, scanner *bufio.Scanner) {
be, s, c, scanner = testServer(t, fn...)
scanner.Scan()
if scanner.Text() != "220 localhost LMTP Service Ready" {
t.Fatal("Invalid greeting:", scanner.Text())
}
return
}
func sendDeliveryCmdsLMTP(t *testing.T, scanner *bufio.Scanner, c io.Writer) {
sendLHLO(t, scanner, c)
io.WriteString(c, "MAIL FROM:<root@nsa.gov>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<root@gchq.gov.uk>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<root@bnd.bund.de>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
io.WriteString(c, "Hey <3\r\n")
io.WriteString(c, ".\r\n")
}
func sendLHLO(t *testing.T, scanner *bufio.Scanner, c io.Writer) {
io.WriteString(c, "LHLO localhost\r\n")
scanner.Scan()
if scanner.Text() != "250-Hello localhost" {
t.Fatal("Invalid LHLO response:", scanner.Text())
}
for scanner.Scan() {
s := scanner.Text()
if strings.HasPrefix(s, "250 ") {
break
} else if !strings.HasPrefix(s, "250-") {
t.Fatal("Invalid capability response:", s)
}
}
}
func TestServer_LMTP(t *testing.T) {
be, s, c, scanner := testServerGreetedLMTP(t, func(s *smtp.Server) {
s.LMTP = true
be := s.Backend.(*backend)
be.implementLMTPData = true
be.lmtpStatus = []struct {
addr string
err error
}{
{"root@gchq.gov.uk", errors.New("nah")},
{"root@bnd.bund.de", nil},
}
})
defer s.Close()
defer c.Close()
sendDeliveryCmdsLMTP(t, scanner, c)
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "554 5.0.0 <root@gchq.gov.uk>") {
t.Fatal("Invalid DATA first response:", scanner.Text())
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA second response:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
func TestServer_LMTP_Early(t *testing.T) {
// This test confirms responses are sent as early as possible
// e.g. right after SetStatus is called.
lmtpStatusSync := make(chan struct{})
be, s, c, scanner := testServerGreetedLMTP(t, func(s *smtp.Server) {
s.LMTP = true
be := s.Backend.(*backend)
be.implementLMTPData = true
be.lmtpStatusSync = lmtpStatusSync
be.lmtpStatus = []struct {
addr string
err error
}{
{"root@gchq.gov.uk", errors.New("nah")},
{"root@bnd.bund.de", nil},
}
})
defer s.Close()
defer c.Close()
sendDeliveryCmdsLMTP(t, scanner, c)
// Test backend sends to sync channel after calling SetStatus.
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "554 5.0.0 <root@gchq.gov.uk>") {
t.Fatal("Invalid DATA first response:", scanner.Text())
}
<-be.lmtpStatusSync
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA second response:", scanner.Text())
}
<-be.lmtpStatusSync
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
func TestServer_LMTP_Expand(t *testing.T) {
// This checks whether handleDataLMTP
// correctly expands results if backend doesn't
// implement LMTPSession.
be, s, c, scanner := testServerGreetedLMTP(t, func(s *smtp.Server) {
s.LMTP = true
})
defer s.Close()
defer c.Close()
sendDeliveryCmdsLMTP(t, scanner, c)
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA first response:", scanner.Text())
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA second response:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
func TestServer_LMTP_DuplicatedRcpt(t *testing.T) {
be, s, c, scanner := testServerGreetedLMTP(t, func(s *smtp.Server) {
s.LMTP = true
be := s.Backend.(*backend)
be.implementLMTPData = true
be.lmtpStatus = []struct {
addr string
err error
}{
{"root@gchq.gov.uk", &smtp.SMTPError{Code: 555}},
{"root@bnd.bund.de", nil},
{"root@gchq.gov.uk", &smtp.SMTPError{Code: 556}},
}
})
defer s.Close()
defer c.Close()
sendLHLO(t, scanner, c)
io.WriteString(c, "MAIL FROM:<root@nsa.gov>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<root@gchq.gov.uk>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<root@bnd.bund.de>\r\n")
scanner.Scan()
io.WriteString(c, "RCPT TO:<root@gchq.gov.uk>\r\n")
scanner.Scan()
io.WriteString(c, "DATA\r\n")
scanner.Scan()
io.WriteString(c, "Hey <3\r\n")
io.WriteString(c, ".\r\n")
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "555 5.0.0 <root@gchq.gov.uk>") {
t.Fatal("Invalid DATA first response:", scanner.Text())
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "250 ") {
t.Fatal("Invalid DATA second response:", scanner.Text())
}
scanner.Scan()
if !strings.HasPrefix(scanner.Text(), "556 5.0.0 <root@gchq.gov.uk>") {
t.Fatal("Invalid DATA first response:", scanner.Text())
}
if len(be.messages) != 0 || len(be.anonmsgs) != 1 {
t.Fatal("Invalid number of sent messages:", be.messages, be.anonmsgs)
}
}
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