+ error("Can't delete route: %m");
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * have_route_to - determine if the system has a route to the specified
+ * IP address. Returns 0 if not, 1 if so, -1 if we can't tell.
+ * `addr' is in network byte order.
+ * For demand mode to work properly, we have to ignore routes
+ * through our own interface.
+ */
+#ifndef T_CURRENT /* needed for Solaris 2.5 */
+#define T_CURRENT MI_T_CURRENT
+#endif
+
+int
+have_route_to(addr)
+ u_int32_t addr;
+{
+ int fd, r, flags, i;
+ struct {
+ struct T_optmgmt_req req;
+ struct opthdr hdr;
+ } req;
+ union {
+ struct T_optmgmt_ack ack;
+ unsigned char space[64];
+ } ack;
+ struct opthdr *rh;
+ struct strbuf cbuf, dbuf;
+ int nroutes;
+ mib2_ipRouteEntry_t routes[8];
+ mib2_ipRouteEntry_t *rp;
+
+ fd = open("/dev/ip", O_RDWR);
+ if (fd < 0) {
+ warn("have_route_to: couldn't open /dev/ip: %m");
+ return -1;
+ }
+
+ req.req.PRIM_type = T_OPTMGMT_REQ;
+ req.req.OPT_offset = (char *) &req.hdr - (char *) &req;
+ req.req.OPT_length = sizeof(req.hdr);
+ req.req.MGMT_flags = T_CURRENT;
+
+ req.hdr.level = MIB2_IP;
+ req.hdr.name = 0;
+ req.hdr.len = 0;
+
+ cbuf.buf = (char *) &req;
+ cbuf.len = sizeof(req);
+
+ if (putmsg(fd, &cbuf, NULL, 0) == -1) {
+ warn("have_route_to: putmsg: %m");
+ close(fd);
+ return -1;
+ }
+
+ for (;;) {
+ cbuf.buf = (char *) &ack;
+ cbuf.maxlen = sizeof(ack);
+ dbuf.buf = (char *) routes;
+ dbuf.maxlen = sizeof(routes);
+ flags = 0;
+ r = getmsg(fd, &cbuf, &dbuf, &flags);
+ if (r == -1) {
+ warn("have_route_to: getmsg: %m");
+ close(fd);
+ return -1;
+ }
+
+ if (cbuf.len < sizeof(struct T_optmgmt_ack)
+ || ack.ack.PRIM_type != T_OPTMGMT_ACK
+ || ack.ack.MGMT_flags != T_SUCCESS
+ || ack.ack.OPT_length < sizeof(struct opthdr)) {
+ dbglog("have_route_to: bad message len=%d prim=%d",
+ cbuf.len, ack.ack.PRIM_type);
+ close(fd);
+ return -1;
+ }
+
+ rh = (struct opthdr *) ((char *)&ack + ack.ack.OPT_offset);
+ if (rh->level == 0 && rh->name == 0)
+ break;
+ if (rh->level != MIB2_IP || rh->name != MIB2_IP_21) {
+ while (r == MOREDATA)
+ r = getmsg(fd, NULL, &dbuf, &flags);
+ continue;
+ }
+
+ for (;;) {
+ nroutes = dbuf.len / sizeof(mib2_ipRouteEntry_t);
+ for (rp = routes, i = 0; i < nroutes; ++i, ++rp) {
+ if (rp->ipRouteMask != ~0) {
+ dbglog("have_route_to: dest=%x gw=%x mask=%x\n",
+ rp->ipRouteDest, rp->ipRouteNextHop,
+ rp->ipRouteMask);
+ if (((addr ^ rp->ipRouteDest) & rp->ipRouteMask) == 0
+ && rp->ipRouteNextHop != remote_addr)
+ return 1;
+ }
+ }
+ if (r == 0)
+ break;
+ r = getmsg(fd, NULL, &dbuf, &flags);
+ }
+ }
+ close(fd);
+ return 0;
+}
+
+/*
+ * get_pty - get a pty master/slave pair and chown the slave side to
+ * the uid given. Assumes slave_name points to MAXPATHLEN bytes of space.
+ */
+int
+get_pty(master_fdp, slave_fdp, slave_name, uid)
+ int *master_fdp;
+ int *slave_fdp;
+ char *slave_name;
+ int uid;
+{
+ int mfd, sfd;
+ char *pty_name;
+ struct termios tios;
+
+ mfd = open("/dev/ptmx", O_RDWR);
+ if (mfd < 0) {
+ error("Couldn't open pty master: %m");