1 files changed, 35 insertions, 0 deletions
diff --git a/src/qmail-remote/qmailr_smtp.c b/src/qmail-remote/qmailr_smtp.c
index a0faf78..1d5d426 100644
--- a/src/qmail-remote/qmailr_smtp.c
+++ b/src/qmail-remote/qmailr_smtp.c
@@ -51,3 +51,38 @@ void qmailr_smtp_quit (buffer *out, unsigned int timeout)
   qdeadline(&deadline, timeout) ;
   buffer_timed_flush_g(out, &deadline) ;
 }
+
+int qmailr_smtp_start (buffer *in, buffer *out, char const *helohost, unsigned int timeout)
+{
+  int hastls = 0 ;
+  tain deadline ;
+  char line[1024] ;
+  int r = qmailr_smtp_read_answer(in, line, 1024, timeout) ;
+  if (r == -1) return -1 ;
+  if (!r) return (errno = EPIPE, -1) ;
+  if (r != 220)
+  {
+    qmailr_smtp_quit(out, timeout) ;
+    return (errno = EPROTO, -1) ;
+  }
+
+  buffer_putnoflush(out, "EHLO ", 5) ;
+  buffer_putsnoflush(out, helohost) ;
+  buffer_putnoflush(out, "\r\n", 2) ;
+
+  qdeadline(&deadline, timeout) ;
+  if (!buffer_timed_flush_g(out, &deadline)) return -1 ;
+
+  qdeadline(&deadline, timeout) ;
+  for (;;)
+  {
+    unsigned int code = 250 ;
+    int r = qmailr_smtp_read_line(in, line, 1024, &code, &deadline) ;
+    if (r == -1) return -1 ;
+    if (!r) return (errno = EPIPE, -1) ;
+    if (code != 250) return (errno = EPROTO, -1) ;
+    if (!strcasecmp(line + 4, "STARTTLS")) hastls = 1 ;
+    if (r == 1) break ;
+  }
+  return hastls ;
+}