+int
+#if BSD>=43
+tcp_ctloutput(op, so, level, optname, mp)
+ int op;
+ struct socket *so;
+ int level, optname;
+ struct mbuf **mp;
+{
+ int error = 0, s;
+ struct inpcb *inp;
+ register struct tcpcb *tp;
+ register struct mbuf *m;
+ register int i;
+
+ s = splnet();
+ inp = sotoinpcb(so);
+ if (inp == NULL) {
+ splx(s);
+ return (ECONNRESET);
+ }
+ if (level != IPPROTO_TCP) {
+ error = ip_ctloutput(op, so, level, optname, mp);
+ splx(s);
+ return (error);
+ }
+ tp = intotcpcb(inp);
+
+ switch (op) {
+
+ case PRCO_SETOPT:
+ m = *mp;
+ switch (optname) {
+
+ case TCP_NODELAY:
+ if (m == NULL || m->m_len < sizeof (int))
+ error = EINVAL;
+ else if (*mtod(m, int *))
+ tp->t_flags |= TF_NODELAY;
+ else
+ tp->t_flags &= ~TF_NODELAY;
+ break;
+
+ case TCP_MAXSEG:
+ if (m && (i = *mtod(m, int *)) > 0 && i <= tp->t_maxseg)
+ tp->t_maxseg = i;
+ else
+ error = EINVAL;
+ break;
+
+ default:
+ error = EINVAL;
+ break;
+ }
+ if (m)
+ (void) m_free(m);
+ break;
+
+ case PRCO_GETOPT:
+ *mp = m = m_get(M_WAIT, MT_SOOPTS);
+ m->m_len = sizeof(int);
+
+ switch (optname) {
+ case TCP_NODELAY:
+ *mtod(m, int *) = tp->t_flags & TF_NODELAY;
+ break;
+ case TCP_MAXSEG:
+ *mtod(m, int *) = tp->t_maxseg;
+ break;
+ default:
+ error = EINVAL;
+ break;
+ }
+ break;
+ }
+ splx(s);
+ return (error);
+}
+#endif
+
+u_long tcp_sendspace = 1024*8;
+u_long tcp_recvspace = 1024*8;
+