Function _reply_light

modules/tm/t_reply.c:346–505

static int _reply_light( struct cell *trans, char* buf, unsigned int len,
			 unsigned int code, char *to_tag, unsigned int to_tag_len,
			 int lock, struct bookmark *bm)
{
	struct retr_buf *rb;
	unsigned int buf_len;
	branch_bm_t cancel_bitmap = BRANCH_BM_ZERO;
	str cb_s;

	if (!buf)
	{
		LM_DBG("response building failed\n");
		/* determine if there are some branches to be canceled */
		if ( is_invite(trans) ) {
			if (lock) LOCK_REPLIES( trans );
			which_cancel(trans, cancel_bitmap );
			if (lock) UNLOCK_REPLIES( trans );
		}
		/* and clean-up, including cancellations, if needed */
		goto error;
	}

	if (lock) LOCK_REPLIES( trans );
	if (trans->uas.status>=200) {
		LM_ERR("failed to generate %d reply when a final %d was sent out\n",
				code, trans->uas.status);
		goto error2;
	}
	if ( is_invite(trans) && code>=200 )
		which_cancel(trans, cancel_bitmap );


	rb = & trans->uas.response;
	rb->activ_type=code;

	trans->uas.status = code;
	buf_len = rb->buffer.s ? len : len + REPLY_OVERBUFFER_LEN;
	rb->buffer.s = shm_realloc( rb->buffer.s, buf_len );
	/* puts the reply's buffer to uas.response */
	if (! rb->buffer.s ) {
			LM_ERR("failed to allocate shmem buffer\n");
			goto error3;
	}
	update_local_tags(trans, bm, rb->buffer.s, buf);

	rb->buffer.len = len ;
	memcpy( rb->buffer.s , buf , len );
	/* needs to be protected too because what timers are set depends
	   on current transactions status */
	/* t_update_timers_after_sending_reply( rb ); */
	trans->relaied_reply_branch=-2;
	if (lock) UNLOCK_REPLIES( trans );

	/* do UAC cleanup procedures in case we generated
	   a final answer whereas there are pending UACs */
	if (code>=200) {
		if ( is_local(trans) ) {
			LM_DBG("local transaction completed\n");