smtp: Reworked smtp_endofresp() to allow for extra capability detection

#endif

#endif

/* Function that checks for an ending smtp status code at the start of the

   given string, but also detects the supported authentication mechanisms

   from  the EHLO AUTH response. */

/* Function that checks for an ending SMTP status code at the start of the

   given string, but also detects various capabilities from the EHLO response

   including the supported authentication mechanisms. */

static int smtp_endofresp(struct pingpong *pp, int *resp)

{

  char *line = pp->linestart_resp;

  if((result = (line[3] == ' ')) != 0)

    *resp = curlx_sltosi(strtol(line, NULL, 10));

  /* Are we processing EHLO command responses? */

  if(smtpc->state == SMTP_EHLO) {

    line += 4;

    len -= 4;

    /* Does the server support the SIZE capability? */

  if(smtpc->state == SMTP_EHLO && len >= 4 && !memcmp(line, "SIZE", 4)) {

    DEBUGF(infof(conn->data, "Server supports SIZE extension.\n"));

    smtpc->size_supported = true;

  }

    if(len >= 4 && !memcmp(line, "SIZE", 4))

      smtpc->size_supported = TRUE;

    /* Do we have the authentication mechanism list? */

  if(smtpc->state == SMTP_EHLO && len >= 5 && !memcmp(line, "AUTH ", 5)) {

    else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {

      line += 5;

      len -= 5;

        len -= wordlen;

      }

    }

  }

  return result;

}