Function tcp_default_ctloutput

freebsd/netinet/tcp_usrreq.c:2039–2639

#endif

int
tcp_default_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp)
{
	int	error, opt, optval;
	u_int	ui;
	struct	tcp_info ti;
#ifdef KERN_TLS
	struct tls_enable tls;
#endif
	struct cc_algo *algo;
	char	*pbuf, buf[TCP_LOG_ID_LEN];
#ifdef STATS
	struct statsblob *sbp;
#endif
	size_t	len;

	/*
	 * For TCP_CCALGOOPT forward the control to CC module, for both
	 * SOPT_SET and SOPT_GET.
	 */
	switch (sopt->sopt_name) {
	case TCP_CCALGOOPT:
		INP_WUNLOCK(inp);
		if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT)
			return (EINVAL);
		pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO);
		error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize,
		    sopt->sopt_valsize);
		if (error) {
			free(pbuf, M_TEMP);
			return (error);
		}
		INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP));
		if (CC_ALGO(tp)->ctl_output != NULL)
			error = CC_ALGO(tp)->ctl_output(tp->ccv, sopt, pbuf);
		else
			error = ENOENT;
		INP_WUNLOCK(inp);
		if (error == 0 && sopt->sopt_dir == SOPT_GET)
			error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize);
		free(pbuf, M_TEMP);
		return (error);
	}

	switch (sopt->sopt_dir) {
	case SOPT_SET:
		switch (sopt->sopt_name) {
#if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE)
		case TCP_MD5SIG:
			if (!TCPMD5_ENABLED()) {
				INP_WUNLOCK(inp);
				return (ENOPROTOOPT);
			}
			error = TCPMD5_PCBCTL(inp, sopt);
			if (error)
				return (error);
			goto unlock_and_done;
#endif /* IPSEC */