+/* Refill the buffer, and notify DKIM verification code.
+Return false for error or EOF.
+*/
+
+static BOOL
+smtp_refill(unsigned lim)
+{
+int rc, save_errno;
+if (!smtp_out) return FALSE;
+fflush(smtp_out);
+if (smtp_receive_timeout > 0) alarm(smtp_receive_timeout);
+
+/* Limit amount read, so non-message data is not fed to DKIM */
+
+rc = read(fileno(smtp_in), smtp_inbuffer, MIN(IN_BUFFER_SIZE, lim));
+save_errno = errno;
+alarm(0);
+if (rc <= 0)
+ {
+ /* Must put the error text in fixed store, because this might be during
+ header reading, where it releases unused store above the header. */
+ if (rc < 0)
+ {
+ smtp_had_error = save_errno;
+ smtp_read_error = string_copy_malloc(
+ string_sprintf(" (error: %s)", strerror(save_errno)));
+ }
+ else smtp_had_eof = 1;
+ return FALSE;
+ }
+#ifndef DISABLE_DKIM
+dkim_exim_verify_feed(smtp_inbuffer, rc);
+#endif
+smtp_inend = smtp_inbuffer + rc;
+smtp_inptr = smtp_inbuffer;
+return TRUE;
+}
+