Function sctp_connect

freebsd/netinet/sctp_usrreq.c:6944–7098

#ifdef INET
static int
sctp_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
{
	struct epoch_tracker et;
	int error = 0;
	int create_lock_on = 0;
	uint32_t vrf_id;
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb = NULL;

	inp = (struct sctp_inpcb *)so->so_pcb;
	if (inp == NULL) {
		/* I made the same as TCP since we are not setup? */
		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
		return (ECONNRESET);
	}
	if (addr == NULL) {
		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
		return EINVAL;
	}

	switch (addr->sa_family) {
#ifdef INET6
	case AF_INET6:
		{
			struct sockaddr_in6 *sin6;

			if (addr->sa_len != sizeof(struct sockaddr_in6)) {
				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
				return (EINVAL);
			}
			sin6 = (struct sockaddr_in6 *)addr;
			if (p != NULL && (error = prison_remote_ip6(p->td_ucred, &sin6->sin6_addr)) != 0) {
				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error);
				return (error);
			}
			break;
		}
#endif
#ifdef INET
	case AF_INET:
		{
			struct sockaddr_in *sin;

			if (addr->sa_len != sizeof(struct sockaddr_in)) {
				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
				return (EINVAL);
			}
			sin = (struct sockaddr_in *)addr;
			if (p != NULL && (error = prison_remote_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error);
				return (error);
			}
			break;
		}
#endif
	default:
		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EAFNOSUPPORT);