+ int error = 0;
+ register struct mbuf *m = m0;
+
+ if (level != SOL_SOCKET) {
+ if (so->so_proto && so->so_proto->pr_ctloutput)
+ return ((*so->so_proto->pr_ctloutput)
+ (PRCO_SETOPT, so, level, optname, &m0));
+ error = ENOPROTOOPT;
+ } else {
+ switch (optname) {
+
+ case SO_LINGER:
+ if (m == NULL || m->m_len != sizeof (struct linger)) {
+ error = EINVAL;
+ goto bad;
+ }
+ so->so_linger = mtod(m, struct linger *)->l_linger;
+ /* fall thru... */
+
+ case SO_DEBUG:
+ case SO_KEEPALIVE:
+ case SO_DONTROUTE:
+ case SO_USELOOPBACK:
+ case SO_BROADCAST:
+ case SO_REUSEADDR:
+ case SO_OOBINLINE:
+ if (m == NULL || m->m_len < sizeof (int)) {
+ error = EINVAL;
+ goto bad;
+ }
+ if (*mtod(m, int *))
+ so->so_options |= optname;
+ else
+ so->so_options &= ~optname;
+ break;
+
+ case SO_SNDBUF:
+ case SO_RCVBUF:
+ case SO_SNDLOWAT:
+ case SO_RCVLOWAT:
+ if (m == NULL || m->m_len < sizeof (int)) {
+ error = EINVAL;
+ goto bad;
+ }
+ switch (optname) {
+
+ case SO_SNDBUF:
+ case SO_RCVBUF:
+ if (sbreserve(optname == SO_SNDBUF ?
+ &so->so_snd : &so->so_rcv,
+ (u_long) *mtod(m, int *)) == 0) {
+ error = ENOBUFS;
+ goto bad;
+ }
+ break;
+
+ case SO_SNDLOWAT:
+ so->so_snd.sb_lowat = *mtod(m, int *);
+ break;
+ case SO_RCVLOWAT:
+ so->so_rcv.sb_lowat = *mtod(m, int *);
+ break;
+ }
+ break;
+
+ case SO_SNDTIMEO:
+ case SO_RCVTIMEO:
+ {
+ struct timeval *tv;
+ short val;
+
+ if (m == NULL || m->m_len < sizeof (*tv)) {
+ error = EINVAL;
+ goto bad;
+ }
+ tv = mtod(m, struct timeval *);
+ if (tv->tv_sec > SHRT_MAX / hz - hz) {
+ error = EDOM;
+ goto bad;
+ }
+ val = tv->tv_sec * hz + tv->tv_usec / tick;
+
+ switch (optname) {