bsd/netinet/tcp_subr.c

948 tcp_getrt_rtt(struct tcpcb *tp, struct rtentry *rt)
950 	u_int32_t rtt = rt->rt_rmx.rmx_rtt;
958 		if (rt->rt_rmx.rmx_locks & RTV_RTT)
964 		if (rt->rt_rmx.rmx_rttvar) {
965 			tp->t_rttvar = rt->rt_rmx.rmx_rttvar /
996 	struct rtentry *rt;
1036 	rt = ro->ro_rt;
1037 	if (rt != NULL)
1038 		RT_LOCK_SPIN(rt);
1058 			if (rt == NULL)
1060 			sin6 = (struct sockaddr_in6 *)(void *)rt_key(rt);
1067 		    SIN(rt_key(rt))->sin_addr.s_addr == INADDR_ANY) {
1078 		RT_LOCK_ASSERT_HELD(rt);
1079 		if ((rt->rt_rmx.rmx_locks & RTV_RTT) == 0) {
1082 			if (rt->rt_rmx.rmx_rtt && i)
1089 				rt->rt_rmx.rmx_rtt =
1090 				    (rt->rt_rmx.rmx_rtt + i) / 2;
1092 				rt->rt_rmx.rmx_rtt = i;
1095 		if ((rt->rt_rmx.rmx_locks & RTV_RTTVAR) == 0) {
1098 			if (rt->rt_rmx.rmx_rttvar && i)
1099 				rt->rt_rmx.rmx_rttvar =
1100 				    (rt->rt_rmx.rmx_rttvar + i) / 2;
1102 				rt->rt_rmx.rmx_rttvar = i;
1120 		if (rt->rt_rmx.rmx_sendpipe != 0)
1121 			dosavessthresh = (i < rt->rt_rmx.rmx_sendpipe / 2);
1124 		if (((rt->rt_rmx.rmx_locks & RTV_SSTHRESH) == 0 &&
1125 		     i != 0 && rt->rt_rmx.rmx_ssthresh != 0)
1144 			if (rt->rt_rmx.rmx_ssthresh)
1145 				rt->rt_rmx.rmx_ssthresh =
1146 				    (rt->rt_rmx.rmx_ssthresh + i) / 2;
1148 				rt->rt_rmx.rmx_ssthresh = i;
1156 	if (rt != NULL && (so->so_flags & SOF_OVERFLOW) && tcp_lq_overflow) {
1157 		if (!(rt->rt_rmx.rmx_locks & RTV_RTT) &&
1158 		    rt->rt_rmx.rmx_rtt == 0) {
1159 			rt->rt_flags |= RTF_DELCLONE;
1164 	if (rt != NULL)
1165 		RT_UNLOCK(rt);
1803 					struct rtentry *rt;
1809 					rt = rtalloc1((struct sockaddr *)&icmpsrc, 0,
1811 					if (rt != NULL) {
1812 						RT_LOCK(rt);
1813 						if ((rt->rt_flags & RTF_HOST) &&
1814 						    !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
1817 								mtu = ip_next_mtu(rt->rt_rmx.
1827 								/* rt->rt_rmx.rmx_mtu =
1828 									rt->rt_ifp->if_mtu; */
1829 								rt->rt_rmx.rmx_locks |= RTV_MTU;
1830 							} else if (rt->rt_rmx.rmx_mtu > mtu) {
1831 								rt->rt_rmx.rmx_mtu = mtu;
1834 						RT_UNLOCK(rt);
1835 						rtfree(rt);
2051 	struct rtentry *rt;
2063 			rt = tcp_rtlookup6(inp, IFSCOPE_NONE);
2066 		rt = tcp_rtlookup(inp, IFSCOPE_NONE);
2067 		if (!rt || !rt->rt_rmx.rmx_mtu) {
2075 			if (rt != NULL)
2076 				RT_UNLOCK(rt);
2079 		taop = rmx_taop(rt->rt_rmx);
2081 		mss = rt->rt_rmx.rmx_mtu -
2093 		RT_UNLOCK(rt);
2155 	struct rtentry *rt;
2161 	if ((rt = ro->ro_rt) != NULL)
2162 		RT_LOCK(rt);
2165 		if (rt != NULL) {
2166 			RT_UNLOCK(rt);
2167 			rt = NULL;
2190 			if ((rt = ro->ro_rt) != NULL)
2191 				RT_LOCK(rt);
2194 	if (rt != NULL)
2195 		RT_LOCK_ASSERT_HELD(rt);
2207 	if (!path_mtu_discovery || ((rt != NULL) &&
2208 	    (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
2215 	    tp->t_state == TCPS_SYN_SENT && rt != NULL && rt->rt_ifp != NULL &&
2216 	    (rt->rt_ifp->if_eflags & IFEF_NOWINDOWSCALE)) {
2222 	if (rt != NULL && rt->rt_ifp != NULL) {
2224 		    (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
2225 		tcp_set_tso(tp, rt->rt_ifp);
2229 	if (rt != NULL &&
2230 		(rt->rt_gateway->sa_family == AF_LINK ||
2231 		rt->rt_ifp->if_flags & IFF_LOOPBACK ||
2237 	 * Caller needs to call RT_UNLOCK(rt).
2239 	return rt;
2249 	struct rtentry *rt;
2255 	if ((rt = ro6->ro_rt) != NULL)
2256 		RT_LOCK(rt);
2259 		if (rt != NULL) {
2260 			RT_UNLOCK(rt);
2261 			rt = NULL;
2285 			if ((rt = ro6->ro_rt) != NULL)
2286 				RT_LOCK(rt);
2289 	if (rt != NULL)
2290 		RT_LOCK_ASSERT_HELD(rt);
2311 	if (!path_mtu_discovery || ((rt != NULL) &&
2312 	    (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
2319 	    tp->t_state == TCPS_SYN_SENT && rt != NULL && rt->rt_ifp != NULL &&
2320 	    (rt->rt_ifp->if_eflags & IFEF_NOWINDOWSCALE)) {
2326 	if (rt != NULL && rt->rt_ifp != NULL) {
2328 		    (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
2329 		tcp_set_tso(tp, rt->rt_ifp);
2333 	if (rt != NULL &&
2336 		rt->rt_gateway->sa_family == AF_LINK ||
2342 	 * Caller needs to call RT_UNLOCK(rt).
2344 	return rt;
2400 	struct rtentry *rt;
2405 		rt = tcp_rtlookup6(inp, IFSCOPE_NONE);
2408 	rt = tcp_rtlookup(inp, IFSCOPE_NONE);
2411 	if (rt == NULL ||
2412 	    (rt->rt_flags & (RTF_UP|RTF_HOST)) != (RTF_UP|RTF_HOST)) {
2414 		if (rt != NULL)
2415 			RT_UNLOCK(rt);
2419 	taop = rmx_taop(rt->rt_rmx);
2421 	RT_UNLOCK(rt);