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net/smtp: use EHLO then HELO

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Before we were using "ESMTP" in the banner as a clue,
but that is not required by the RFC and breaks mailing
to smtp.yandex.ru.

Fixes #3045.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5687066
This commit is contained in:
Russ Cox 2012-02-21 16:39:02 -05:00
parent fc7ed45b35
commit 2110fadd12
2 changed files with 95 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/pkg/net/smtp/smtp.go
View File

@ -50,15 +50,14 @@ func Dial(addr string) (*Client, error) {
// server name to be used when authenticating.
func NewClient(conn net.Conn, host string) (*Client, error) {
text := textproto.NewConn(conn)
_, msg, err := text.ReadResponse(220)
_, _, err := text.ReadResponse(220)
if err != nil {
text.Close()
return nil, err
}
c := &Client{Text: text, conn: conn, serverName: host}
if strings.Contains(msg, "ESMTP") {
err = c.ehlo()
} else {
if err != nil {
err = c.helo()
}
return c, err

95
src/pkg/net/smtp/smtp_test.go
View File

@ -8,9 +8,11 @@ import (
"bufio"
"bytes"
"io"
"net"
"net/textproto"
"strings"
"testing"
"time"
)
type authTest struct {
@ -59,9 +61,12 @@ type faker struct {
io.ReadWriter
}
func (f faker) Close() error {
return nil
}
func (f faker) Close() error { return nil }
func (f faker) LocalAddr() net.Addr { return nil }
func (f faker) RemoteAddr() net.Addr { return nil }
func (f faker) SetDeadline(time.Time) error { return nil }
func (f faker) SetReadDeadline(time.Time) error { return nil }
func (f faker) SetWriteDeadline(time.Time) error { return nil }
func TestBasic(t *testing.T) {
basicServer = strings.Join(strings.Split(basicServer, "\n"), "\r\n")
@ -180,3 +185,87 @@ Goodbye.
.
QUIT
`
func TestNewClient(t *testing.T) {
newClientServer = strings.Join(strings.Split(newClientServer, "\n"), "\r\n")
newClientClient = strings.Join(strings.Split(newClientClient, "\n"), "\r\n")
var cmdbuf bytes.Buffer
bcmdbuf := bufio.NewWriter(&cmdbuf)
out := func() string {
bcmdbuf.Flush()
return cmdbuf.String()
}
var fake faker
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(newClientServer)), bcmdbuf)
c, err := NewClient(fake, "fake.host")
if err != nil {
t.Fatalf("NewClient: %v\n(after %v)", err, out())
}
if ok, args := c.Extension("aUtH"); !ok || args != "LOGIN PLAIN" {
t.Fatalf("Expected AUTH supported")
}
if ok, _ := c.Extension("DSN"); ok {
t.Fatalf("Shouldn't support DSN")
}
if err := c.Quit(); err != nil {
t.Fatalf("QUIT failed: %s", err)
}
actualcmds := out()
if newClientClient != actualcmds {
t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, newClientClient)
}
}
var newClientServer = `220 hello world
250-mx.google.com at your service
250-SIZE 35651584
250-AUTH LOGIN PLAIN
250 8BITMIME
221 OK
`
var newClientClient = `EHLO localhost
QUIT
`
func TestNewClient2(t *testing.T) {
newClient2Server = strings.Join(strings.Split(newClient2Server, "\n"), "\r\n")
newClient2Client = strings.Join(strings.Split(newClient2Client, "\n"), "\r\n")
var cmdbuf bytes.Buffer
bcmdbuf := bufio.NewWriter(&cmdbuf)
var fake faker
fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(newClient2Server)), bcmdbuf)
c, err := NewClient(fake, "fake.host")
if err != nil {
t.Fatalf("NewClient: %v", err)
}
if ok, _ := c.Extension("DSN"); ok {
t.Fatalf("Shouldn't support DSN")
}
if err := c.Quit(); err != nil {
t.Fatalf("QUIT failed: %s", err)
}
bcmdbuf.Flush()
actualcmds := cmdbuf.String()
if newClient2Client != actualcmds {
t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, newClient2Client)
}
}
var newClient2Server = `220 hello world
502 EH?
250-mx.google.com at your service
250-SIZE 35651584
250-AUTH LOGIN PLAIN
250 8BITMIME
221 OK
`
var newClient2Client = `EHLO localhost
HELO localhost
QUIT
`