17c478bd9Sstevel@tonic-gate /* 2*d52135a8SSowmini Varadhan * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 37c478bd9Sstevel@tonic-gate * Use is subject to license terms. 47c478bd9Sstevel@tonic-gate * 57c478bd9Sstevel@tonic-gate * Copyright (c) 1983, 1988, 1993 67c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 97c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions 107c478bd9Sstevel@tonic-gate * are met: 117c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright 127c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 137c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 147c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 157c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 167c478bd9Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 177c478bd9Sstevel@tonic-gate * must display the following acknowledgment: 187c478bd9Sstevel@tonic-gate * This product includes software developed by the University of 197c478bd9Sstevel@tonic-gate * California, Berkeley and its contributors. 207c478bd9Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors 217c478bd9Sstevel@tonic-gate * may be used to endorse or promote products derived from this software 227c478bd9Sstevel@tonic-gate * without specific prior written permission. 237c478bd9Sstevel@tonic-gate * 247c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 257c478bd9Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 267c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 277c478bd9Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 287c478bd9Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 297c478bd9Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 307c478bd9Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 317c478bd9Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 327c478bd9Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 337c478bd9Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 347c478bd9Sstevel@tonic-gate * SUCH DAMAGE. 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate * $FreeBSD: src/sbin/routed/table.c,v 1.15 2000/08/11 08:24:38 sheldonh Exp $ 377c478bd9Sstevel@tonic-gate */ 387c478bd9Sstevel@tonic-gate 397c478bd9Sstevel@tonic-gate #include "defs.h" 407c478bd9Sstevel@tonic-gate #include <fcntl.h> 417c478bd9Sstevel@tonic-gate #include <stropts.h> 427c478bd9Sstevel@tonic-gate #include <sys/tihdr.h> 437c478bd9Sstevel@tonic-gate #include <inet/mib2.h> 447c478bd9Sstevel@tonic-gate #include <inet/ip.h> 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate /* This structure is used to store a disassembled routing socket message. */ 477c478bd9Sstevel@tonic-gate struct rt_addrinfo { 487c478bd9Sstevel@tonic-gate int rti_addrs; 497c478bd9Sstevel@tonic-gate struct sockaddr_storage *rti_info[RTAX_MAX]; 507c478bd9Sstevel@tonic-gate }; 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate static struct rt_spare *rts_better(struct rt_entry *); 537c478bd9Sstevel@tonic-gate static struct rt_spare rts_empty = EMPTY_RT_SPARE; 547c478bd9Sstevel@tonic-gate static void set_need_flash(void); 557c478bd9Sstevel@tonic-gate static void rtbad(struct rt_entry *, struct interface *); 567c478bd9Sstevel@tonic-gate static int rt_xaddrs(struct rt_addrinfo *, struct sockaddr_storage *, 577c478bd9Sstevel@tonic-gate char *, int); 587c478bd9Sstevel@tonic-gate static struct interface *gwkludge_iflookup(in_addr_t, in_addr_t, in_addr_t); 59982ec2c2SRishi Srivatsavai static struct interface *lifp_iflookup(in_addr_t, const char *); 607c478bd9Sstevel@tonic-gate 617c478bd9Sstevel@tonic-gate struct radix_node_head *rhead; /* root of the radix tree */ 627c478bd9Sstevel@tonic-gate 637c478bd9Sstevel@tonic-gate /* Flash update needed. _B_TRUE to suppress the 1st. */ 647c478bd9Sstevel@tonic-gate boolean_t need_flash = _B_TRUE; 657c478bd9Sstevel@tonic-gate 667c478bd9Sstevel@tonic-gate struct timeval age_timer; /* next check of old routes */ 677c478bd9Sstevel@tonic-gate struct timeval need_kern = { /* need to update kernel table */ 687c478bd9Sstevel@tonic-gate EPOCH+MIN_WAITTIME-1, 0 697c478bd9Sstevel@tonic-gate }; 707c478bd9Sstevel@tonic-gate 717c478bd9Sstevel@tonic-gate static uint32_t total_routes; 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate #define ROUNDUP_LONG(a) \ 747c478bd9Sstevel@tonic-gate ((a) > 0 ? (1 + (((a) - 1) | (sizeof (long) - 1))) : sizeof (long)) 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate /* 777c478bd9Sstevel@tonic-gate * It is desirable to "aggregate" routes, to combine differing routes of 787c478bd9Sstevel@tonic-gate * the same metric and next hop into a common route with a smaller netmask 797c478bd9Sstevel@tonic-gate * or to suppress redundant routes, routes that add no information to 807c478bd9Sstevel@tonic-gate * routes with smaller netmasks. 817c478bd9Sstevel@tonic-gate * 827c478bd9Sstevel@tonic-gate * A route is redundant if and only if any and all routes with smaller 837c478bd9Sstevel@tonic-gate * but matching netmasks and nets are the same. Since routes are 847c478bd9Sstevel@tonic-gate * kept sorted in the radix tree, redundant routes always come second. 857c478bd9Sstevel@tonic-gate * 867c478bd9Sstevel@tonic-gate * There are two kinds of aggregations. First, two routes of the same bit 877c478bd9Sstevel@tonic-gate * mask and differing only in the least significant bit of the network 887c478bd9Sstevel@tonic-gate * number can be combined into a single route with a coarser mask. 897c478bd9Sstevel@tonic-gate * 907c478bd9Sstevel@tonic-gate * Second, a route can be suppressed in favor of another route with a more 917c478bd9Sstevel@tonic-gate * coarse mask provided no incompatible routes with intermediate masks 927c478bd9Sstevel@tonic-gate * are present. The second kind of aggregation involves suppressing routes. 937c478bd9Sstevel@tonic-gate * A route must not be suppressed if an incompatible route exists with 947c478bd9Sstevel@tonic-gate * an intermediate mask, since the suppressed route would be covered 957c478bd9Sstevel@tonic-gate * by the intermediate. 967c478bd9Sstevel@tonic-gate * 977c478bd9Sstevel@tonic-gate * This code relies on the radix tree walk encountering routes 987c478bd9Sstevel@tonic-gate * sorted first by address, with the smallest address first. 997c478bd9Sstevel@tonic-gate */ 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate static struct ag_info ag_slots[NUM_AG_SLOTS], *ag_avail, *ag_corsest, 1027c478bd9Sstevel@tonic-gate *ag_finest; 1037c478bd9Sstevel@tonic-gate 1047c478bd9Sstevel@tonic-gate #ifdef DEBUG_AG 1057c478bd9Sstevel@tonic-gate #define CHECK_AG() do { int acnt = 0; struct ag_info *cag; \ 1067c478bd9Sstevel@tonic-gate for (cag = ag_avail; cag != NULL; cag = cag->ag_fine) \ 1077c478bd9Sstevel@tonic-gate acnt++; \ 1087c478bd9Sstevel@tonic-gate for (cag = ag_corsest; cag != NULL; cag = cag->ag_fine) \ 1097c478bd9Sstevel@tonic-gate acnt++; \ 1107c478bd9Sstevel@tonic-gate if (acnt != NUM_AG_SLOTS) \ 1117c478bd9Sstevel@tonic-gate abort(); \ 1127c478bd9Sstevel@tonic-gate } while (_B_FALSE) 1137c478bd9Sstevel@tonic-gate #else 1147c478bd9Sstevel@tonic-gate #define CHECK_AG() (void)0 1157c478bd9Sstevel@tonic-gate #endif 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate 1187c478bd9Sstevel@tonic-gate /* 1197c478bd9Sstevel@tonic-gate * Output the contents of an aggregation table slot. 1207c478bd9Sstevel@tonic-gate * This function must always be immediately followed with the deletion 1217c478bd9Sstevel@tonic-gate * of the target slot. 1227c478bd9Sstevel@tonic-gate */ 1237c478bd9Sstevel@tonic-gate static void 1247c478bd9Sstevel@tonic-gate ag_out(struct ag_info *ag, void (*out)(struct ag_info *)) 1257c478bd9Sstevel@tonic-gate { 1267c478bd9Sstevel@tonic-gate struct ag_info *ag_cors; 1277c478bd9Sstevel@tonic-gate uint32_t bit; 1287c478bd9Sstevel@tonic-gate 1297c478bd9Sstevel@tonic-gate 1307c478bd9Sstevel@tonic-gate /* Forget it if this route should not be output for split-horizon. */ 1317c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_SPLIT_HZ) 1327c478bd9Sstevel@tonic-gate return; 1337c478bd9Sstevel@tonic-gate 1347c478bd9Sstevel@tonic-gate /* 1357c478bd9Sstevel@tonic-gate * If we output both the even and odd twins, then the immediate parent, 1367c478bd9Sstevel@tonic-gate * if it is present, is redundant, unless the parent manages to 1377c478bd9Sstevel@tonic-gate * aggregate into something coarser. 1387c478bd9Sstevel@tonic-gate * On successive calls, this code detects the even and odd twins, 1397c478bd9Sstevel@tonic-gate * and marks the parent. 1407c478bd9Sstevel@tonic-gate * 1417c478bd9Sstevel@tonic-gate * Note that the order in which the radix tree code emits routes 1427c478bd9Sstevel@tonic-gate * ensures that the twins are seen before the parent is emitted. 1437c478bd9Sstevel@tonic-gate */ 1447c478bd9Sstevel@tonic-gate ag_cors = ag->ag_cors; 1457c478bd9Sstevel@tonic-gate if (ag_cors != NULL && 1467c478bd9Sstevel@tonic-gate ag_cors->ag_mask == (ag->ag_mask << 1) && 1477c478bd9Sstevel@tonic-gate ag_cors->ag_dst_h == (ag->ag_dst_h & ag_cors->ag_mask)) { 1487c478bd9Sstevel@tonic-gate ag_cors->ag_state |= ((ag_cors->ag_dst_h == ag->ag_dst_h) ? 1497c478bd9Sstevel@tonic-gate AGS_REDUN0 : AGS_REDUN1); 1507c478bd9Sstevel@tonic-gate } 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate /* 1537c478bd9Sstevel@tonic-gate * Skip it if this route is itself redundant. 1547c478bd9Sstevel@tonic-gate * 1557c478bd9Sstevel@tonic-gate * It is ok to change the contents of the slot here, since it is 1567c478bd9Sstevel@tonic-gate * always deleted next. 1577c478bd9Sstevel@tonic-gate */ 1587c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_REDUN0) { 1597c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_REDUN1) 1607c478bd9Sstevel@tonic-gate return; /* quit if fully redundant */ 1617c478bd9Sstevel@tonic-gate /* make it finer if it is half-redundant */ 1627c478bd9Sstevel@tonic-gate bit = (-ag->ag_mask) >> 1; 1637c478bd9Sstevel@tonic-gate ag->ag_dst_h |= bit; 1647c478bd9Sstevel@tonic-gate ag->ag_mask |= bit; 1657c478bd9Sstevel@tonic-gate 1667c478bd9Sstevel@tonic-gate } else if (ag->ag_state & AGS_REDUN1) { 1677c478bd9Sstevel@tonic-gate /* make it finer if it is half-redundant */ 1687c478bd9Sstevel@tonic-gate bit = (-ag->ag_mask) >> 1; 1697c478bd9Sstevel@tonic-gate ag->ag_mask |= bit; 1707c478bd9Sstevel@tonic-gate } 1717c478bd9Sstevel@tonic-gate out(ag); 1727c478bd9Sstevel@tonic-gate } 1737c478bd9Sstevel@tonic-gate 1747c478bd9Sstevel@tonic-gate 1757c478bd9Sstevel@tonic-gate static void 1767c478bd9Sstevel@tonic-gate ag_del(struct ag_info *ag) 1777c478bd9Sstevel@tonic-gate { 1787c478bd9Sstevel@tonic-gate CHECK_AG(); 1797c478bd9Sstevel@tonic-gate 1807c478bd9Sstevel@tonic-gate if (ag->ag_cors == NULL) 1817c478bd9Sstevel@tonic-gate ag_corsest = ag->ag_fine; 1827c478bd9Sstevel@tonic-gate else 1837c478bd9Sstevel@tonic-gate ag->ag_cors->ag_fine = ag->ag_fine; 1847c478bd9Sstevel@tonic-gate 1857c478bd9Sstevel@tonic-gate if (ag->ag_fine == NULL) 1867c478bd9Sstevel@tonic-gate ag_finest = ag->ag_cors; 1877c478bd9Sstevel@tonic-gate else 1887c478bd9Sstevel@tonic-gate ag->ag_fine->ag_cors = ag->ag_cors; 1897c478bd9Sstevel@tonic-gate 1907c478bd9Sstevel@tonic-gate ag->ag_fine = ag_avail; 1917c478bd9Sstevel@tonic-gate ag_avail = ag; 1927c478bd9Sstevel@tonic-gate 1937c478bd9Sstevel@tonic-gate CHECK_AG(); 1947c478bd9Sstevel@tonic-gate } 1957c478bd9Sstevel@tonic-gate 1967c478bd9Sstevel@tonic-gate 1977c478bd9Sstevel@tonic-gate /* Look for a route that can suppress the given route. */ 1987c478bd9Sstevel@tonic-gate static struct ag_info * 1997c478bd9Sstevel@tonic-gate ag_find_suppressor(struct ag_info *ag) 2007c478bd9Sstevel@tonic-gate { 2017c478bd9Sstevel@tonic-gate struct ag_info *ag_cors; 2027c478bd9Sstevel@tonic-gate in_addr_t dst_h = ag->ag_dst_h; 2037c478bd9Sstevel@tonic-gate 2047c478bd9Sstevel@tonic-gate for (ag_cors = ag->ag_cors; ag_cors != NULL; 2057c478bd9Sstevel@tonic-gate ag_cors = ag_cors->ag_cors) { 2067c478bd9Sstevel@tonic-gate 2077c478bd9Sstevel@tonic-gate if ((dst_h & ag_cors->ag_mask) == ag_cors->ag_dst_h) { 2087c478bd9Sstevel@tonic-gate /* 2097c478bd9Sstevel@tonic-gate * We found a route with a coarser mask that covers 2107c478bd9Sstevel@tonic-gate * the given target. It can suppress the target 2117c478bd9Sstevel@tonic-gate * only if it has a good enough metric and it 2127c478bd9Sstevel@tonic-gate * either has the same (gateway, ifp), or if its state 2137c478bd9Sstevel@tonic-gate * includes AGS_CORS_GATE or the target's state 2147c478bd9Sstevel@tonic-gate * includes AGS_FINE_GATE. 2157c478bd9Sstevel@tonic-gate */ 2167c478bd9Sstevel@tonic-gate if (ag_cors->ag_pref <= ag->ag_pref && 2177c478bd9Sstevel@tonic-gate (((ag->ag_nhop == ag_cors->ag_nhop) && 2187c478bd9Sstevel@tonic-gate (ag->ag_ifp == ag_cors->ag_ifp)) || 2197c478bd9Sstevel@tonic-gate ag_cors->ag_state & AGS_CORS_GATE || 2207c478bd9Sstevel@tonic-gate ag->ag_state & AGS_FINE_GATE)) { 2217c478bd9Sstevel@tonic-gate return (ag_cors); 2227c478bd9Sstevel@tonic-gate } 2237c478bd9Sstevel@tonic-gate } 2247c478bd9Sstevel@tonic-gate } 2257c478bd9Sstevel@tonic-gate 2267c478bd9Sstevel@tonic-gate return (NULL); 2277c478bd9Sstevel@tonic-gate } 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate 2307c478bd9Sstevel@tonic-gate /* 2317c478bd9Sstevel@tonic-gate * Flush routes waiting for aggregation. 2327c478bd9Sstevel@tonic-gate * This must not suppress a route unless it is known that among all routes 2337c478bd9Sstevel@tonic-gate * with coarser masks that match it, the one with the longest mask is 2347c478bd9Sstevel@tonic-gate * appropriate. This is ensured by scanning the routes in lexical order, 2357c478bd9Sstevel@tonic-gate * and with the most restrictive mask first among routes to the same 2367c478bd9Sstevel@tonic-gate * destination. 2377c478bd9Sstevel@tonic-gate */ 2387c478bd9Sstevel@tonic-gate void 2397c478bd9Sstevel@tonic-gate ag_flush(in_addr_t lim_dst_h, /* flush routes to here */ 2407c478bd9Sstevel@tonic-gate in_addr_t lim_mask, /* matching this mask */ 2417c478bd9Sstevel@tonic-gate void (*out)(struct ag_info *)) 2427c478bd9Sstevel@tonic-gate { 2437c478bd9Sstevel@tonic-gate struct ag_info *ag, *ag_cors, *ag_supr; 2447c478bd9Sstevel@tonic-gate in_addr_t dst_h; 2457c478bd9Sstevel@tonic-gate 2467c478bd9Sstevel@tonic-gate 2477c478bd9Sstevel@tonic-gate for (ag = ag_finest; ag != NULL && ag->ag_mask >= lim_mask; 2487c478bd9Sstevel@tonic-gate ag = ag_cors) { 2497c478bd9Sstevel@tonic-gate /* Get the next route now, before we delete ag. */ 2507c478bd9Sstevel@tonic-gate ag_cors = ag->ag_cors; 2517c478bd9Sstevel@tonic-gate 2527c478bd9Sstevel@tonic-gate /* Work on only the specified routes. */ 2537c478bd9Sstevel@tonic-gate dst_h = ag->ag_dst_h; 2547c478bd9Sstevel@tonic-gate if ((dst_h & lim_mask) != lim_dst_h) 2557c478bd9Sstevel@tonic-gate continue; 2567c478bd9Sstevel@tonic-gate 2577c478bd9Sstevel@tonic-gate /* 2587c478bd9Sstevel@tonic-gate * Don't try to suppress the route if its state doesn't 2597c478bd9Sstevel@tonic-gate * include AGS_SUPPRESS. 2607c478bd9Sstevel@tonic-gate */ 2617c478bd9Sstevel@tonic-gate if (!(ag->ag_state & AGS_SUPPRESS)) { 2627c478bd9Sstevel@tonic-gate ag_out(ag, out); 2637c478bd9Sstevel@tonic-gate ag_del(ag); 2647c478bd9Sstevel@tonic-gate continue; 2657c478bd9Sstevel@tonic-gate } 2667c478bd9Sstevel@tonic-gate 2677c478bd9Sstevel@tonic-gate ag_supr = ag_find_suppressor(ag); 2687c478bd9Sstevel@tonic-gate if (ag_supr == NULL) { 2697c478bd9Sstevel@tonic-gate /* 2707c478bd9Sstevel@tonic-gate * We didn't find a route which suppresses the 2717c478bd9Sstevel@tonic-gate * target, so the target can go out. 2727c478bd9Sstevel@tonic-gate */ 2737c478bd9Sstevel@tonic-gate ag_out(ag, out); 2747c478bd9Sstevel@tonic-gate } else { 2757c478bd9Sstevel@tonic-gate /* 2767c478bd9Sstevel@tonic-gate * We found a route which suppresses the target, so 2777c478bd9Sstevel@tonic-gate * don't output the target. 2787c478bd9Sstevel@tonic-gate */ 2797c478bd9Sstevel@tonic-gate if (TRACEACTIONS) { 2807c478bd9Sstevel@tonic-gate trace_misc("aggregated away %s", 2817c478bd9Sstevel@tonic-gate rtname(htonl(ag->ag_dst_h), ag->ag_mask, 2827c478bd9Sstevel@tonic-gate ag->ag_nhop)); 2837c478bd9Sstevel@tonic-gate trace_misc("on coarser route %s", 2847c478bd9Sstevel@tonic-gate rtname(htonl(ag_supr->ag_dst_h), 2857c478bd9Sstevel@tonic-gate ag_supr->ag_mask, ag_supr->ag_nhop)); 2867c478bd9Sstevel@tonic-gate } 2877c478bd9Sstevel@tonic-gate /* 2887c478bd9Sstevel@tonic-gate * If the suppressed target was redundant, then 2897c478bd9Sstevel@tonic-gate * mark the suppressor as redundant. 2907c478bd9Sstevel@tonic-gate */ 2917c478bd9Sstevel@tonic-gate if (AG_IS_REDUN(ag->ag_state) && 2927c478bd9Sstevel@tonic-gate ag_supr->ag_mask == (ag->ag_mask<<1)) { 2937c478bd9Sstevel@tonic-gate if (ag_supr->ag_dst_h == dst_h) 2947c478bd9Sstevel@tonic-gate ag_supr->ag_state |= AGS_REDUN0; 2957c478bd9Sstevel@tonic-gate else 2967c478bd9Sstevel@tonic-gate ag_supr->ag_state |= AGS_REDUN1; 2977c478bd9Sstevel@tonic-gate } 2987c478bd9Sstevel@tonic-gate if (ag->ag_tag != ag_supr->ag_tag) 2997c478bd9Sstevel@tonic-gate ag_supr->ag_tag = 0; 3007c478bd9Sstevel@tonic-gate if (ag->ag_nhop != ag_supr->ag_nhop) 3017c478bd9Sstevel@tonic-gate ag_supr->ag_nhop = 0; 3027c478bd9Sstevel@tonic-gate } 3037c478bd9Sstevel@tonic-gate 3047c478bd9Sstevel@tonic-gate /* The route has either been output or suppressed */ 3057c478bd9Sstevel@tonic-gate ag_del(ag); 3067c478bd9Sstevel@tonic-gate } 3077c478bd9Sstevel@tonic-gate 3087c478bd9Sstevel@tonic-gate CHECK_AG(); 3097c478bd9Sstevel@tonic-gate } 3107c478bd9Sstevel@tonic-gate 3117c478bd9Sstevel@tonic-gate 3127c478bd9Sstevel@tonic-gate /* Try to aggregate a route with previous routes. */ 3137c478bd9Sstevel@tonic-gate void 3147c478bd9Sstevel@tonic-gate ag_check(in_addr_t dst, 3157c478bd9Sstevel@tonic-gate in_addr_t mask, 3167c478bd9Sstevel@tonic-gate in_addr_t gate, 3177c478bd9Sstevel@tonic-gate struct interface *ifp, 3187c478bd9Sstevel@tonic-gate in_addr_t nhop, 3197c478bd9Sstevel@tonic-gate uint8_t metric, 3207c478bd9Sstevel@tonic-gate uint8_t pref, 3217c478bd9Sstevel@tonic-gate uint32_t seqno, 3227c478bd9Sstevel@tonic-gate uint16_t tag, 3237c478bd9Sstevel@tonic-gate uint16_t state, 3247c478bd9Sstevel@tonic-gate void (*out)(struct ag_info *)) /* output using this */ 3257c478bd9Sstevel@tonic-gate { 3267c478bd9Sstevel@tonic-gate struct ag_info *ag, *nag, *ag_cors; 3277c478bd9Sstevel@tonic-gate in_addr_t xaddr; 3287c478bd9Sstevel@tonic-gate int tmp; 3297c478bd9Sstevel@tonic-gate struct interface *xifp; 3307c478bd9Sstevel@tonic-gate 3317c478bd9Sstevel@tonic-gate dst = ntohl(dst); 3327c478bd9Sstevel@tonic-gate 3337c478bd9Sstevel@tonic-gate /* 3347c478bd9Sstevel@tonic-gate * Don't bother trying to aggregate routes with non-contiguous 3357c478bd9Sstevel@tonic-gate * subnet masks. 3367c478bd9Sstevel@tonic-gate * 3377c478bd9Sstevel@tonic-gate * (X & -X) contains a single bit if and only if X is a power of 2. 3387c478bd9Sstevel@tonic-gate * (X + (X & -X)) == 0 if and only if X is a power of 2. 3397c478bd9Sstevel@tonic-gate */ 3407c478bd9Sstevel@tonic-gate if ((mask & -mask) + mask != 0) { 3417c478bd9Sstevel@tonic-gate struct ag_info nc_ag; 3427c478bd9Sstevel@tonic-gate 3437c478bd9Sstevel@tonic-gate nc_ag.ag_dst_h = dst; 3447c478bd9Sstevel@tonic-gate nc_ag.ag_mask = mask; 3457c478bd9Sstevel@tonic-gate nc_ag.ag_gate = gate; 3467c478bd9Sstevel@tonic-gate nc_ag.ag_ifp = ifp; 3477c478bd9Sstevel@tonic-gate nc_ag.ag_nhop = nhop; 3487c478bd9Sstevel@tonic-gate nc_ag.ag_metric = metric; 3497c478bd9Sstevel@tonic-gate nc_ag.ag_pref = pref; 3507c478bd9Sstevel@tonic-gate nc_ag.ag_tag = tag; 3517c478bd9Sstevel@tonic-gate nc_ag.ag_state = state; 3527c478bd9Sstevel@tonic-gate nc_ag.ag_seqno = seqno; 3537c478bd9Sstevel@tonic-gate out(&nc_ag); 3547c478bd9Sstevel@tonic-gate return; 3557c478bd9Sstevel@tonic-gate } 3567c478bd9Sstevel@tonic-gate 3577c478bd9Sstevel@tonic-gate /* Search for the right slot in the aggregation table. */ 3587c478bd9Sstevel@tonic-gate ag_cors = NULL; 3597c478bd9Sstevel@tonic-gate ag = ag_corsest; 3607c478bd9Sstevel@tonic-gate while (ag != NULL) { 3617c478bd9Sstevel@tonic-gate if (ag->ag_mask >= mask) 3627c478bd9Sstevel@tonic-gate break; 3637c478bd9Sstevel@tonic-gate 3647c478bd9Sstevel@tonic-gate /* 3657c478bd9Sstevel@tonic-gate * Suppress old routes (i.e. combine with compatible routes 3667c478bd9Sstevel@tonic-gate * with coarser masks) as we look for the right slot in the 3677c478bd9Sstevel@tonic-gate * aggregation table for the new route. 3687c478bd9Sstevel@tonic-gate * A route to an address less than the current destination 3697c478bd9Sstevel@tonic-gate * will not be affected by the current route or any route 3707c478bd9Sstevel@tonic-gate * seen hereafter. That means it is safe to suppress it. 3717c478bd9Sstevel@tonic-gate * This check keeps poor routes (e.g. with large hop counts) 3727c478bd9Sstevel@tonic-gate * from preventing suppression of finer routes. 3737c478bd9Sstevel@tonic-gate */ 3747c478bd9Sstevel@tonic-gate if (ag_cors != NULL && ag->ag_dst_h < dst && 3757c478bd9Sstevel@tonic-gate (ag->ag_state & AGS_SUPPRESS) && 3767c478bd9Sstevel@tonic-gate ag_cors->ag_pref <= ag->ag_pref && 3777c478bd9Sstevel@tonic-gate (ag->ag_dst_h & ag_cors->ag_mask) == ag_cors->ag_dst_h && 3787c478bd9Sstevel@tonic-gate ((ag_cors->ag_nhop == ag->ag_nhop && 3797c478bd9Sstevel@tonic-gate (ag_cors->ag_ifp == ag->ag_ifp))|| 380f9aa3e1eSkcpoon (ag->ag_state & AGS_FINE_GATE) || 381f9aa3e1eSkcpoon (ag_cors->ag_state & AGS_CORS_GATE))) { 3827c478bd9Sstevel@tonic-gate /* 3837c478bd9Sstevel@tonic-gate * If the suppressed target was redundant, 3847c478bd9Sstevel@tonic-gate * then mark the suppressor redundant. 3857c478bd9Sstevel@tonic-gate */ 3867c478bd9Sstevel@tonic-gate if (AG_IS_REDUN(ag->ag_state) && 3877c478bd9Sstevel@tonic-gate ag_cors->ag_mask == (ag->ag_mask << 1)) { 3887c478bd9Sstevel@tonic-gate if (ag_cors->ag_dst_h == dst) 3897c478bd9Sstevel@tonic-gate ag_cors->ag_state |= AGS_REDUN0; 3907c478bd9Sstevel@tonic-gate else 3917c478bd9Sstevel@tonic-gate ag_cors->ag_state |= AGS_REDUN1; 3927c478bd9Sstevel@tonic-gate } 3937c478bd9Sstevel@tonic-gate if (ag->ag_tag != ag_cors->ag_tag) 3947c478bd9Sstevel@tonic-gate ag_cors->ag_tag = 0; 3957c478bd9Sstevel@tonic-gate if (ag->ag_nhop != ag_cors->ag_nhop) 3967c478bd9Sstevel@tonic-gate ag_cors->ag_nhop = 0; 3977c478bd9Sstevel@tonic-gate ag_del(ag); 3987c478bd9Sstevel@tonic-gate CHECK_AG(); 3997c478bd9Sstevel@tonic-gate } else { 4007c478bd9Sstevel@tonic-gate ag_cors = ag; 4017c478bd9Sstevel@tonic-gate } 4027c478bd9Sstevel@tonic-gate ag = ag_cors->ag_fine; 4037c478bd9Sstevel@tonic-gate } 4047c478bd9Sstevel@tonic-gate 4057c478bd9Sstevel@tonic-gate /* 4067c478bd9Sstevel@tonic-gate * If we find the even/odd twin of the new route, and if the 4077c478bd9Sstevel@tonic-gate * masks and so forth are equal, we can aggregate them. 4087c478bd9Sstevel@tonic-gate * We can probably promote one of the pair. 4097c478bd9Sstevel@tonic-gate * 4107c478bd9Sstevel@tonic-gate * Since the routes are encountered in lexical order, 4117c478bd9Sstevel@tonic-gate * the new route must be odd. However, the second or later 4127c478bd9Sstevel@tonic-gate * times around this loop, it could be the even twin promoted 4137c478bd9Sstevel@tonic-gate * from the even/odd pair of twins of the finer route. 4147c478bd9Sstevel@tonic-gate */ 4157c478bd9Sstevel@tonic-gate while (ag != NULL && ag->ag_mask == mask && 4167c478bd9Sstevel@tonic-gate ((ag->ag_dst_h ^ dst) & (mask<<1)) == 0) { 4177c478bd9Sstevel@tonic-gate 4187c478bd9Sstevel@tonic-gate /* 4197c478bd9Sstevel@tonic-gate * Here we know the target route and the route in the current 4207c478bd9Sstevel@tonic-gate * slot have the same netmasks and differ by at most the 4217c478bd9Sstevel@tonic-gate * last bit. They are either for the same destination, or 4227c478bd9Sstevel@tonic-gate * for an even/odd pair of destinations. 4237c478bd9Sstevel@tonic-gate */ 4247c478bd9Sstevel@tonic-gate if (ag->ag_dst_h == dst) { 4257c478bd9Sstevel@tonic-gate if (ag->ag_nhop == nhop && ag->ag_ifp == ifp) { 4267c478bd9Sstevel@tonic-gate /* 4277c478bd9Sstevel@tonic-gate * We have two routes to the same destination, 4287c478bd9Sstevel@tonic-gate * with the same nexthop and interface. 4297c478bd9Sstevel@tonic-gate * Routes are encountered in lexical order, 4307c478bd9Sstevel@tonic-gate * so a route is never promoted until the 4317c478bd9Sstevel@tonic-gate * parent route is already present. So we 4327c478bd9Sstevel@tonic-gate * know that the new route is a promoted (or 4337c478bd9Sstevel@tonic-gate * aggregated) pair and the route already in 4347c478bd9Sstevel@tonic-gate * the slot is the explicit route. 4357c478bd9Sstevel@tonic-gate * 4367c478bd9Sstevel@tonic-gate * Prefer the best route if their metrics 4377c478bd9Sstevel@tonic-gate * differ, or the aggregated one if not, 4387c478bd9Sstevel@tonic-gate * following a sort of longest-match rule. 4397c478bd9Sstevel@tonic-gate */ 4407c478bd9Sstevel@tonic-gate if (pref <= ag->ag_pref) { 4417c478bd9Sstevel@tonic-gate ag->ag_gate = gate; 4427c478bd9Sstevel@tonic-gate ag->ag_ifp = ifp; 4437c478bd9Sstevel@tonic-gate ag->ag_nhop = nhop; 4447c478bd9Sstevel@tonic-gate ag->ag_tag = tag; 4457c478bd9Sstevel@tonic-gate ag->ag_metric = metric; 4467c478bd9Sstevel@tonic-gate ag->ag_pref = pref; 4477c478bd9Sstevel@tonic-gate if (seqno > ag->ag_seqno) 4487c478bd9Sstevel@tonic-gate ag->ag_seqno = seqno; 4497c478bd9Sstevel@tonic-gate tmp = ag->ag_state; 4507c478bd9Sstevel@tonic-gate ag->ag_state = state; 4517c478bd9Sstevel@tonic-gate state = tmp; 4527c478bd9Sstevel@tonic-gate } 4537c478bd9Sstevel@tonic-gate 4547c478bd9Sstevel@tonic-gate /* 4557c478bd9Sstevel@tonic-gate * Some bits are set if they are set on 4567c478bd9Sstevel@tonic-gate * either route, except when the route is 4577c478bd9Sstevel@tonic-gate * for an interface. 4587c478bd9Sstevel@tonic-gate */ 4597c478bd9Sstevel@tonic-gate if (!(ag->ag_state & AGS_IF)) 4607c478bd9Sstevel@tonic-gate ag->ag_state |= 4617c478bd9Sstevel@tonic-gate (state & (AGS_AGGREGATE_EITHER | 4627c478bd9Sstevel@tonic-gate AGS_REDUN0 | AGS_REDUN1)); 4637c478bd9Sstevel@tonic-gate 4647c478bd9Sstevel@tonic-gate return; 4657c478bd9Sstevel@tonic-gate } else { 4667c478bd9Sstevel@tonic-gate /* 4677c478bd9Sstevel@tonic-gate * multiple routes to same dest/mask with 4687c478bd9Sstevel@tonic-gate * differing gate nexthop/or ifp. Flush 4697c478bd9Sstevel@tonic-gate * both out. 4707c478bd9Sstevel@tonic-gate */ 4717c478bd9Sstevel@tonic-gate break; 4727c478bd9Sstevel@tonic-gate } 4737c478bd9Sstevel@tonic-gate } 4747c478bd9Sstevel@tonic-gate 4757c478bd9Sstevel@tonic-gate /* 4767c478bd9Sstevel@tonic-gate * If one of the routes can be promoted and the other can 4777c478bd9Sstevel@tonic-gate * be suppressed, it may be possible to combine them or 4787c478bd9Sstevel@tonic-gate * worthwhile to promote one. 4797c478bd9Sstevel@tonic-gate * 4807c478bd9Sstevel@tonic-gate * Any route that can be promoted is always 4817c478bd9Sstevel@tonic-gate * marked to be eligible to be suppressed. 4827c478bd9Sstevel@tonic-gate */ 4837c478bd9Sstevel@tonic-gate if (!((state & AGS_AGGREGATE) && 4847c478bd9Sstevel@tonic-gate (ag->ag_state & AGS_SUPPRESS)) && 4857c478bd9Sstevel@tonic-gate !((ag->ag_state & AGS_AGGREGATE) && (state & AGS_SUPPRESS))) 4867c478bd9Sstevel@tonic-gate break; 4877c478bd9Sstevel@tonic-gate 4887c478bd9Sstevel@tonic-gate /* 4897c478bd9Sstevel@tonic-gate * A pair of even/odd twin routes can be combined 4907c478bd9Sstevel@tonic-gate * if either is redundant, or if they are via the 4917c478bd9Sstevel@tonic-gate * same gateway and have the same metric. 4927c478bd9Sstevel@tonic-gate */ 4937c478bd9Sstevel@tonic-gate if (AG_IS_REDUN(ag->ag_state) || AG_IS_REDUN(state) || 4947c478bd9Sstevel@tonic-gate (ag->ag_nhop == nhop && ag->ag_ifp == ifp && 4957c478bd9Sstevel@tonic-gate ag->ag_pref == pref && 4967c478bd9Sstevel@tonic-gate (state & ag->ag_state & AGS_AGGREGATE) != 0)) { 4977c478bd9Sstevel@tonic-gate 4987c478bd9Sstevel@tonic-gate /* 4997c478bd9Sstevel@tonic-gate * We have both the even and odd pairs. 5007c478bd9Sstevel@tonic-gate * Since the routes are encountered in order, 5017c478bd9Sstevel@tonic-gate * the route in the slot must be the even twin. 5027c478bd9Sstevel@tonic-gate * 5037c478bd9Sstevel@tonic-gate * Combine and promote (aggregate) the pair of routes. 5047c478bd9Sstevel@tonic-gate */ 5057c478bd9Sstevel@tonic-gate if (seqno < ag->ag_seqno) 5067c478bd9Sstevel@tonic-gate seqno = ag->ag_seqno; 5077c478bd9Sstevel@tonic-gate if (!AG_IS_REDUN(state)) 5087c478bd9Sstevel@tonic-gate state &= ~AGS_REDUN1; 5097c478bd9Sstevel@tonic-gate if (AG_IS_REDUN(ag->ag_state)) 5107c478bd9Sstevel@tonic-gate state |= AGS_REDUN0; 5117c478bd9Sstevel@tonic-gate else 5127c478bd9Sstevel@tonic-gate state &= ~AGS_REDUN0; 5137c478bd9Sstevel@tonic-gate state |= (ag->ag_state & AGS_AGGREGATE_EITHER); 5147c478bd9Sstevel@tonic-gate if (ag->ag_tag != tag) 5157c478bd9Sstevel@tonic-gate tag = 0; 5167c478bd9Sstevel@tonic-gate if (ag->ag_nhop != nhop) 5177c478bd9Sstevel@tonic-gate nhop = 0; 5187c478bd9Sstevel@tonic-gate 5197c478bd9Sstevel@tonic-gate /* 5207c478bd9Sstevel@tonic-gate * Get rid of the even twin that was already 5217c478bd9Sstevel@tonic-gate * in the slot. 5227c478bd9Sstevel@tonic-gate */ 5237c478bd9Sstevel@tonic-gate ag_del(ag); 5247c478bd9Sstevel@tonic-gate 5257c478bd9Sstevel@tonic-gate } else if (ag->ag_pref >= pref && 5267c478bd9Sstevel@tonic-gate (ag->ag_state & AGS_AGGREGATE)) { 5277c478bd9Sstevel@tonic-gate /* 5287c478bd9Sstevel@tonic-gate * If we cannot combine the pair, maybe the route 5297c478bd9Sstevel@tonic-gate * with the worse metric can be promoted. 5307c478bd9Sstevel@tonic-gate * 5317c478bd9Sstevel@tonic-gate * Promote the old, even twin, by giving its slot 5327c478bd9Sstevel@tonic-gate * in the table to the new, odd twin. 5337c478bd9Sstevel@tonic-gate */ 5347c478bd9Sstevel@tonic-gate ag->ag_dst_h = dst; 5357c478bd9Sstevel@tonic-gate 5367c478bd9Sstevel@tonic-gate xaddr = ag->ag_gate; 5377c478bd9Sstevel@tonic-gate ag->ag_gate = gate; 5387c478bd9Sstevel@tonic-gate gate = xaddr; 5397c478bd9Sstevel@tonic-gate 5407c478bd9Sstevel@tonic-gate xifp = ag->ag_ifp; 5417c478bd9Sstevel@tonic-gate ag->ag_ifp = ifp; 5427c478bd9Sstevel@tonic-gate ifp = xifp; 5437c478bd9Sstevel@tonic-gate 5447c478bd9Sstevel@tonic-gate xaddr = ag->ag_nhop; 5457c478bd9Sstevel@tonic-gate ag->ag_nhop = nhop; 5467c478bd9Sstevel@tonic-gate nhop = xaddr; 5477c478bd9Sstevel@tonic-gate 5487c478bd9Sstevel@tonic-gate tmp = ag->ag_tag; 5497c478bd9Sstevel@tonic-gate ag->ag_tag = tag; 5507c478bd9Sstevel@tonic-gate tag = tmp; 5517c478bd9Sstevel@tonic-gate 5527c478bd9Sstevel@tonic-gate /* 5537c478bd9Sstevel@tonic-gate * The promoted route is even-redundant only if the 5547c478bd9Sstevel@tonic-gate * even twin was fully redundant. It is not 5557c478bd9Sstevel@tonic-gate * odd-redundant because the odd-twin will still be 5567c478bd9Sstevel@tonic-gate * in the table. 5577c478bd9Sstevel@tonic-gate */ 5587c478bd9Sstevel@tonic-gate tmp = ag->ag_state; 5597c478bd9Sstevel@tonic-gate if (!AG_IS_REDUN(tmp)) 5607c478bd9Sstevel@tonic-gate tmp &= ~AGS_REDUN0; 5617c478bd9Sstevel@tonic-gate tmp &= ~AGS_REDUN1; 5627c478bd9Sstevel@tonic-gate ag->ag_state = state; 5637c478bd9Sstevel@tonic-gate state = tmp; 5647c478bd9Sstevel@tonic-gate 5657c478bd9Sstevel@tonic-gate tmp = ag->ag_metric; 5667c478bd9Sstevel@tonic-gate ag->ag_metric = metric; 5677c478bd9Sstevel@tonic-gate metric = tmp; 5687c478bd9Sstevel@tonic-gate 5697c478bd9Sstevel@tonic-gate tmp = ag->ag_pref; 5707c478bd9Sstevel@tonic-gate ag->ag_pref = pref; 5717c478bd9Sstevel@tonic-gate pref = tmp; 5727c478bd9Sstevel@tonic-gate 5737c478bd9Sstevel@tonic-gate /* take the newest sequence number */ 5747c478bd9Sstevel@tonic-gate if (seqno <= ag->ag_seqno) 5757c478bd9Sstevel@tonic-gate seqno = ag->ag_seqno; 5767c478bd9Sstevel@tonic-gate else 5777c478bd9Sstevel@tonic-gate ag->ag_seqno = seqno; 5787c478bd9Sstevel@tonic-gate 5797c478bd9Sstevel@tonic-gate } else { 5807c478bd9Sstevel@tonic-gate if (!(state & AGS_AGGREGATE)) 5817c478bd9Sstevel@tonic-gate break; /* cannot promote either twin */ 5827c478bd9Sstevel@tonic-gate 5837c478bd9Sstevel@tonic-gate /* 5847c478bd9Sstevel@tonic-gate * Promote the new, odd twin by shaving its 5857c478bd9Sstevel@tonic-gate * mask and address. 5867c478bd9Sstevel@tonic-gate * The promoted route is odd-redundant only if the 5877c478bd9Sstevel@tonic-gate * odd twin was fully redundant. It is not 5887c478bd9Sstevel@tonic-gate * even-redundant because the even twin is still in 5897c478bd9Sstevel@tonic-gate * the table. 5907c478bd9Sstevel@tonic-gate */ 5917c478bd9Sstevel@tonic-gate if (!AG_IS_REDUN(state)) 5927c478bd9Sstevel@tonic-gate state &= ~AGS_REDUN1; 5937c478bd9Sstevel@tonic-gate state &= ~AGS_REDUN0; 5947c478bd9Sstevel@tonic-gate if (seqno < ag->ag_seqno) 5957c478bd9Sstevel@tonic-gate seqno = ag->ag_seqno; 5967c478bd9Sstevel@tonic-gate else 5977c478bd9Sstevel@tonic-gate ag->ag_seqno = seqno; 5987c478bd9Sstevel@tonic-gate } 5997c478bd9Sstevel@tonic-gate 6007c478bd9Sstevel@tonic-gate mask <<= 1; 6017c478bd9Sstevel@tonic-gate dst &= mask; 6027c478bd9Sstevel@tonic-gate 6037c478bd9Sstevel@tonic-gate if (ag_cors == NULL) { 6047c478bd9Sstevel@tonic-gate ag = ag_corsest; 6057c478bd9Sstevel@tonic-gate break; 6067c478bd9Sstevel@tonic-gate } 6077c478bd9Sstevel@tonic-gate ag = ag_cors; 6087c478bd9Sstevel@tonic-gate ag_cors = ag->ag_cors; 6097c478bd9Sstevel@tonic-gate } 6107c478bd9Sstevel@tonic-gate 6117c478bd9Sstevel@tonic-gate /* 6127c478bd9Sstevel@tonic-gate * When we can no longer promote and combine routes, 6137c478bd9Sstevel@tonic-gate * flush the old route in the target slot. Also flush 6147c478bd9Sstevel@tonic-gate * any finer routes that we know will never be aggregated by 6157c478bd9Sstevel@tonic-gate * the new route. 6167c478bd9Sstevel@tonic-gate * 6177c478bd9Sstevel@tonic-gate * In case we moved toward coarser masks, 6187c478bd9Sstevel@tonic-gate * get back where we belong 6197c478bd9Sstevel@tonic-gate */ 6207c478bd9Sstevel@tonic-gate if (ag != NULL && ag->ag_mask < mask) { 6217c478bd9Sstevel@tonic-gate ag_cors = ag; 6227c478bd9Sstevel@tonic-gate ag = ag->ag_fine; 6237c478bd9Sstevel@tonic-gate } 6247c478bd9Sstevel@tonic-gate 6257c478bd9Sstevel@tonic-gate /* Empty the target slot */ 6267c478bd9Sstevel@tonic-gate if (ag != NULL && ag->ag_mask == mask) { 6277c478bd9Sstevel@tonic-gate ag_flush(ag->ag_dst_h, ag->ag_mask, out); 6287c478bd9Sstevel@tonic-gate ag = (ag_cors == NULL) ? ag_corsest : ag_cors->ag_fine; 6297c478bd9Sstevel@tonic-gate } 6307c478bd9Sstevel@tonic-gate 6317c478bd9Sstevel@tonic-gate #ifdef DEBUG_AG 6327c478bd9Sstevel@tonic-gate if (ag == NULL && ag_cors != ag_finest) 6337c478bd9Sstevel@tonic-gate abort(); 6347c478bd9Sstevel@tonic-gate if (ag_cors == NULL && ag != ag_corsest) 6357c478bd9Sstevel@tonic-gate abort(); 6367c478bd9Sstevel@tonic-gate if (ag != NULL && ag->ag_cors != ag_cors) 6377c478bd9Sstevel@tonic-gate abort(); 6387c478bd9Sstevel@tonic-gate if (ag_cors != NULL && ag_cors->ag_fine != ag) 6397c478bd9Sstevel@tonic-gate abort(); 6407c478bd9Sstevel@tonic-gate CHECK_AG(); 6417c478bd9Sstevel@tonic-gate #endif 6427c478bd9Sstevel@tonic-gate 6437c478bd9Sstevel@tonic-gate /* Save the new route on the end of the table. */ 6447c478bd9Sstevel@tonic-gate nag = ag_avail; 6457c478bd9Sstevel@tonic-gate ag_avail = nag->ag_fine; 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate nag->ag_dst_h = dst; 6487c478bd9Sstevel@tonic-gate nag->ag_mask = mask; 6497c478bd9Sstevel@tonic-gate nag->ag_ifp = ifp; 6507c478bd9Sstevel@tonic-gate nag->ag_gate = gate; 6517c478bd9Sstevel@tonic-gate nag->ag_nhop = nhop; 6527c478bd9Sstevel@tonic-gate nag->ag_metric = metric; 6537c478bd9Sstevel@tonic-gate nag->ag_pref = pref; 6547c478bd9Sstevel@tonic-gate nag->ag_tag = tag; 6557c478bd9Sstevel@tonic-gate nag->ag_state = state; 6567c478bd9Sstevel@tonic-gate nag->ag_seqno = seqno; 6577c478bd9Sstevel@tonic-gate 6587c478bd9Sstevel@tonic-gate nag->ag_fine = ag; 6597c478bd9Sstevel@tonic-gate if (ag != NULL) 6607c478bd9Sstevel@tonic-gate ag->ag_cors = nag; 6617c478bd9Sstevel@tonic-gate else 6627c478bd9Sstevel@tonic-gate ag_finest = nag; 6637c478bd9Sstevel@tonic-gate nag->ag_cors = ag_cors; 6647c478bd9Sstevel@tonic-gate if (ag_cors == NULL) 6657c478bd9Sstevel@tonic-gate ag_corsest = nag; 6667c478bd9Sstevel@tonic-gate else 6677c478bd9Sstevel@tonic-gate ag_cors->ag_fine = nag; 6687c478bd9Sstevel@tonic-gate CHECK_AG(); 6697c478bd9Sstevel@tonic-gate } 6707c478bd9Sstevel@tonic-gate 6717c478bd9Sstevel@tonic-gate 6727c478bd9Sstevel@tonic-gate static const char * 6737c478bd9Sstevel@tonic-gate rtm_type_name(uchar_t type) 6747c478bd9Sstevel@tonic-gate { 6757c478bd9Sstevel@tonic-gate static const char *rtm_types[] = { 6767c478bd9Sstevel@tonic-gate "RTM_ADD", 6777c478bd9Sstevel@tonic-gate "RTM_DELETE", 6787c478bd9Sstevel@tonic-gate "RTM_CHANGE", 6797c478bd9Sstevel@tonic-gate "RTM_GET", 6807c478bd9Sstevel@tonic-gate "RTM_LOSING", 6817c478bd9Sstevel@tonic-gate "RTM_REDIRECT", 6827c478bd9Sstevel@tonic-gate "RTM_MISS", 6837c478bd9Sstevel@tonic-gate "RTM_LOCK", 6847c478bd9Sstevel@tonic-gate "RTM_OLDADD", 6857c478bd9Sstevel@tonic-gate "RTM_OLDDEL", 6867c478bd9Sstevel@tonic-gate "RTM_RESOLVE", 6877c478bd9Sstevel@tonic-gate "RTM_NEWADDR", 6887c478bd9Sstevel@tonic-gate "RTM_DELADDR", 6897c478bd9Sstevel@tonic-gate "RTM_IFINFO", 6901cb875aeSCathy Zhou "RTM_CHGMADDR", 6911cb875aeSCathy Zhou "RTM_FREEMADDR" 6927c478bd9Sstevel@tonic-gate }; 6937c478bd9Sstevel@tonic-gate #define NEW_RTM_PAT "RTM type %#x" 6947c478bd9Sstevel@tonic-gate static char name0[sizeof (NEW_RTM_PAT) + 2]; 6957c478bd9Sstevel@tonic-gate 6967c478bd9Sstevel@tonic-gate if (type > sizeof (rtm_types) / sizeof (rtm_types[0]) || type == 0) { 6977c478bd9Sstevel@tonic-gate (void) snprintf(name0, sizeof (name0), NEW_RTM_PAT, type); 6987c478bd9Sstevel@tonic-gate return (name0); 6997c478bd9Sstevel@tonic-gate } else { 7007c478bd9Sstevel@tonic-gate return (rtm_types[type-1]); 7017c478bd9Sstevel@tonic-gate } 7027c478bd9Sstevel@tonic-gate #undef NEW_RTM_PAT 7037c478bd9Sstevel@tonic-gate } 7047c478bd9Sstevel@tonic-gate 7057c478bd9Sstevel@tonic-gate 7067c478bd9Sstevel@tonic-gate static void 7077c478bd9Sstevel@tonic-gate dump_rt_msg(const char *act, struct rt_msghdr *rtm, int mlen) 7087c478bd9Sstevel@tonic-gate { 7097c478bd9Sstevel@tonic-gate const char *mtype; 7107c478bd9Sstevel@tonic-gate uchar_t *cp; 7117c478bd9Sstevel@tonic-gate int i, j; 7127c478bd9Sstevel@tonic-gate char buffer[16*3 + 1], *ibs; 7137c478bd9Sstevel@tonic-gate struct ifa_msghdr *ifam; 7147c478bd9Sstevel@tonic-gate struct if_msghdr *ifm; 7157c478bd9Sstevel@tonic-gate 7167c478bd9Sstevel@tonic-gate switch (rtm->rtm_type) { 7177c478bd9Sstevel@tonic-gate case RTM_NEWADDR: 7187c478bd9Sstevel@tonic-gate case RTM_DELADDR: 7191cb875aeSCathy Zhou case RTM_FREEADDR: 7201cb875aeSCathy Zhou case RTM_CHGADDR: 7217c478bd9Sstevel@tonic-gate mtype = "ifam"; 7227c478bd9Sstevel@tonic-gate break; 7237c478bd9Sstevel@tonic-gate case RTM_IFINFO: 7247c478bd9Sstevel@tonic-gate mtype = "ifm"; 7257c478bd9Sstevel@tonic-gate break; 7267c478bd9Sstevel@tonic-gate default: 7277c478bd9Sstevel@tonic-gate mtype = "rtm"; 7287c478bd9Sstevel@tonic-gate break; 7297c478bd9Sstevel@tonic-gate } 7307c478bd9Sstevel@tonic-gate trace_misc("%s %s %d bytes", act, mtype, mlen); 7317c478bd9Sstevel@tonic-gate if (mlen > rtm->rtm_msglen) { 7327c478bd9Sstevel@tonic-gate trace_misc("%s: extra %d bytes ignored", mtype, 7337c478bd9Sstevel@tonic-gate mlen - rtm->rtm_msglen); 7347c478bd9Sstevel@tonic-gate mlen = rtm->rtm_msglen; 7357c478bd9Sstevel@tonic-gate } else if (mlen < rtm->rtm_msglen) { 7367c478bd9Sstevel@tonic-gate trace_misc("%s: truncated by %d bytes", mtype, 7377c478bd9Sstevel@tonic-gate rtm->rtm_msglen - mlen); 7387c478bd9Sstevel@tonic-gate } 7397c478bd9Sstevel@tonic-gate switch (rtm->rtm_type) { 7407c478bd9Sstevel@tonic-gate case RTM_NEWADDR: 7417c478bd9Sstevel@tonic-gate case RTM_DELADDR: 7421cb875aeSCathy Zhou case RTM_CHGADDR: 7431cb875aeSCathy Zhou case RTM_FREEADDR: 7447c478bd9Sstevel@tonic-gate ifam = (struct ifa_msghdr *)rtm; 7457c478bd9Sstevel@tonic-gate trace_misc("ifam: msglen %d version %d type %d addrs %X", 7467c478bd9Sstevel@tonic-gate ifam->ifam_msglen, ifam->ifam_version, ifam->ifam_type, 7477c478bd9Sstevel@tonic-gate ifam->ifam_addrs); 7487c478bd9Sstevel@tonic-gate trace_misc("ifam: flags %X index %d metric %d", 7497c478bd9Sstevel@tonic-gate ifam->ifam_flags, ifam->ifam_index, ifam->ifam_metric); 7507c478bd9Sstevel@tonic-gate cp = (uchar_t *)(ifam + 1); 7517c478bd9Sstevel@tonic-gate break; 7527c478bd9Sstevel@tonic-gate case RTM_IFINFO: 7537c478bd9Sstevel@tonic-gate ifm = (struct if_msghdr *)rtm; 7547c478bd9Sstevel@tonic-gate trace_misc("ifm: msglen %d version %d type %d addrs %X", 7557c478bd9Sstevel@tonic-gate ifm->ifm_msglen, ifm->ifm_version, ifm->ifm_type, 7567c478bd9Sstevel@tonic-gate ifm->ifm_addrs); 7577c478bd9Sstevel@tonic-gate ibs = if_bit_string(ifm->ifm_flags, _B_TRUE); 7587c478bd9Sstevel@tonic-gate if (ibs == NULL) { 7597c478bd9Sstevel@tonic-gate trace_misc("ifm: flags %#x index %d", ifm->ifm_flags, 7607c478bd9Sstevel@tonic-gate ifm->ifm_index); 7617c478bd9Sstevel@tonic-gate } else { 7627c478bd9Sstevel@tonic-gate trace_misc("ifm: flags %s index %d", ibs, 7637c478bd9Sstevel@tonic-gate ifm->ifm_index); 7647c478bd9Sstevel@tonic-gate free(ibs); 7657c478bd9Sstevel@tonic-gate } 7667c478bd9Sstevel@tonic-gate cp = (uchar_t *)(ifm + 1); 7677c478bd9Sstevel@tonic-gate break; 7687c478bd9Sstevel@tonic-gate default: 7697c478bd9Sstevel@tonic-gate trace_misc("rtm: msglen %d version %d type %d index %d", 7707c478bd9Sstevel@tonic-gate rtm->rtm_msglen, rtm->rtm_version, rtm->rtm_type, 7717c478bd9Sstevel@tonic-gate rtm->rtm_index); 7727c478bd9Sstevel@tonic-gate trace_misc("rtm: flags %X addrs %X pid %d seq %d", 7737c478bd9Sstevel@tonic-gate rtm->rtm_flags, rtm->rtm_addrs, rtm->rtm_pid, rtm->rtm_seq); 7747c478bd9Sstevel@tonic-gate trace_misc("rtm: errno %d use %d inits %X", rtm->rtm_errno, 7757c478bd9Sstevel@tonic-gate rtm->rtm_use, rtm->rtm_inits); 7767c478bd9Sstevel@tonic-gate cp = (uchar_t *)(rtm + 1); 7777c478bd9Sstevel@tonic-gate break; 7787c478bd9Sstevel@tonic-gate } 7797c478bd9Sstevel@tonic-gate i = mlen - (cp - (uint8_t *)rtm); 7807c478bd9Sstevel@tonic-gate while (i > 0) { 7817c478bd9Sstevel@tonic-gate buffer[0] = '\0'; 7827c478bd9Sstevel@tonic-gate ibs = buffer; 7837c478bd9Sstevel@tonic-gate for (j = 0; j < 16 && i > 0; j++, i--) 7847c478bd9Sstevel@tonic-gate ibs += sprintf(ibs, " %02X", *cp++); 7857c478bd9Sstevel@tonic-gate trace_misc("addr%s", buffer); 7867c478bd9Sstevel@tonic-gate } 7877c478bd9Sstevel@tonic-gate } 7887c478bd9Sstevel@tonic-gate 7897c478bd9Sstevel@tonic-gate /* 7907c478bd9Sstevel@tonic-gate * Tell the kernel to add, delete or change a route 7917c478bd9Sstevel@tonic-gate * Pass k_state from khash in for diagnostic info. 7927c478bd9Sstevel@tonic-gate */ 7937c478bd9Sstevel@tonic-gate static void 7947c478bd9Sstevel@tonic-gate rtioctl(int action, /* RTM_DELETE, etc */ 7957c478bd9Sstevel@tonic-gate in_addr_t dst, 7967c478bd9Sstevel@tonic-gate in_addr_t gate, 7977c478bd9Sstevel@tonic-gate in_addr_t mask, 7987c478bd9Sstevel@tonic-gate struct interface *ifp, 7997c478bd9Sstevel@tonic-gate uint8_t metric, 8007c478bd9Sstevel@tonic-gate int flags) 8017c478bd9Sstevel@tonic-gate { 8027c478bd9Sstevel@tonic-gate static int rt_sock_seqno = 0; 8037c478bd9Sstevel@tonic-gate struct { 8047c478bd9Sstevel@tonic-gate struct rt_msghdr w_rtm; 8057c478bd9Sstevel@tonic-gate struct sockaddr_in w_dst; 8067c478bd9Sstevel@tonic-gate struct sockaddr_in w_gate; 8077c478bd9Sstevel@tonic-gate uint8_t w_space[512]; 8087c478bd9Sstevel@tonic-gate } w; 8097c478bd9Sstevel@tonic-gate struct sockaddr_in w_mask; 8107c478bd9Sstevel@tonic-gate struct sockaddr_dl w_ifp; 8117c478bd9Sstevel@tonic-gate uint8_t *cp; 8127c478bd9Sstevel@tonic-gate long cc; 8137c478bd9Sstevel@tonic-gate #define PAT " %-10s %s metric=%d flags=%#x" 8147c478bd9Sstevel@tonic-gate #define ARGS rtm_type_name(action), rtname(dst, mask, gate), metric, flags 8157c478bd9Sstevel@tonic-gate 8167c478bd9Sstevel@tonic-gate again: 8177c478bd9Sstevel@tonic-gate (void) memset(&w, 0, sizeof (w)); 8187c478bd9Sstevel@tonic-gate (void) memset(&w_mask, 0, sizeof (w_mask)); 8197c478bd9Sstevel@tonic-gate (void) memset(&w_ifp, 0, sizeof (w_ifp)); 8207c478bd9Sstevel@tonic-gate cp = w.w_space; 8217c478bd9Sstevel@tonic-gate w.w_rtm.rtm_msglen = sizeof (struct rt_msghdr) + 8227c478bd9Sstevel@tonic-gate 2 * ROUNDUP_LONG(sizeof (struct sockaddr_in)); 8237c478bd9Sstevel@tonic-gate w.w_rtm.rtm_version = RTM_VERSION; 8247c478bd9Sstevel@tonic-gate w.w_rtm.rtm_type = action; 8257c478bd9Sstevel@tonic-gate w.w_rtm.rtm_flags = flags; 8267c478bd9Sstevel@tonic-gate w.w_rtm.rtm_seq = ++rt_sock_seqno; 8277c478bd9Sstevel@tonic-gate w.w_rtm.rtm_addrs = RTA_DST|RTA_GATEWAY; 8287c478bd9Sstevel@tonic-gate if (metric != 0 || action == RTM_CHANGE) { 8297c478bd9Sstevel@tonic-gate w.w_rtm.rtm_rmx.rmx_hopcount = metric; 8307c478bd9Sstevel@tonic-gate w.w_rtm.rtm_inits |= RTV_HOPCOUNT; 8317c478bd9Sstevel@tonic-gate } 8327c478bd9Sstevel@tonic-gate w.w_dst.sin_family = AF_INET; 8337c478bd9Sstevel@tonic-gate w.w_dst.sin_addr.s_addr = dst; 8347c478bd9Sstevel@tonic-gate w.w_gate.sin_family = AF_INET; 8357c478bd9Sstevel@tonic-gate w.w_gate.sin_addr.s_addr = gate; 8367c478bd9Sstevel@tonic-gate if (mask == HOST_MASK) { 8377c478bd9Sstevel@tonic-gate w.w_rtm.rtm_flags |= RTF_HOST; 8387c478bd9Sstevel@tonic-gate } else { 8397c478bd9Sstevel@tonic-gate w.w_rtm.rtm_addrs |= RTA_NETMASK; 8407c478bd9Sstevel@tonic-gate w_mask.sin_family = AF_INET; 8417c478bd9Sstevel@tonic-gate w_mask.sin_addr.s_addr = htonl(mask); 8427c478bd9Sstevel@tonic-gate (void) memmove(cp, &w_mask, sizeof (w_mask)); 8437c478bd9Sstevel@tonic-gate cp += ROUNDUP_LONG(sizeof (struct sockaddr_in)); 8447c478bd9Sstevel@tonic-gate w.w_rtm.rtm_msglen += ROUNDUP_LONG(sizeof (struct sockaddr_in)); 8457c478bd9Sstevel@tonic-gate } 8467c478bd9Sstevel@tonic-gate if (ifp == NULL) 8477c478bd9Sstevel@tonic-gate ifp = iflookup(gate); 8487c478bd9Sstevel@tonic-gate 849982ec2c2SRishi Srivatsavai if (ifp == NULL || (ifp->int_phys == NULL)) { 8507c478bd9Sstevel@tonic-gate trace_misc("no ifp for" PAT, ARGS); 8517c478bd9Sstevel@tonic-gate } else { 8527c478bd9Sstevel@tonic-gate if (ifp->int_phys->phyi_index > UINT16_MAX) { 8537c478bd9Sstevel@tonic-gate trace_misc("ifindex %d is too big for sdl_index", 8547c478bd9Sstevel@tonic-gate ifp->int_phys->phyi_index); 8557c478bd9Sstevel@tonic-gate } else { 8567c478bd9Sstevel@tonic-gate w_ifp.sdl_family = AF_LINK; 8577c478bd9Sstevel@tonic-gate w.w_rtm.rtm_addrs |= RTA_IFP; 8587c478bd9Sstevel@tonic-gate w_ifp.sdl_index = ifp->int_phys->phyi_index; 8597c478bd9Sstevel@tonic-gate (void) memmove(cp, &w_ifp, sizeof (w_ifp)); 8607c478bd9Sstevel@tonic-gate w.w_rtm.rtm_msglen += 8617c478bd9Sstevel@tonic-gate ROUNDUP_LONG(sizeof (struct sockaddr_dl)); 8627c478bd9Sstevel@tonic-gate } 8637c478bd9Sstevel@tonic-gate } 8647c478bd9Sstevel@tonic-gate 8657c478bd9Sstevel@tonic-gate 8667c478bd9Sstevel@tonic-gate if (!no_install) { 8677c478bd9Sstevel@tonic-gate if (TRACERTS) 8687c478bd9Sstevel@tonic-gate dump_rt_msg("write", &w.w_rtm, w.w_rtm.rtm_msglen); 8697c478bd9Sstevel@tonic-gate cc = write(rt_sock, &w, w.w_rtm.rtm_msglen); 8707c478bd9Sstevel@tonic-gate if (cc < 0) { 8717c478bd9Sstevel@tonic-gate if (errno == ESRCH && (action == RTM_CHANGE || 8727c478bd9Sstevel@tonic-gate action == RTM_DELETE)) { 8737c478bd9Sstevel@tonic-gate trace_act("route disappeared before" PAT, ARGS); 8747c478bd9Sstevel@tonic-gate if (action == RTM_CHANGE) { 8757c478bd9Sstevel@tonic-gate action = RTM_ADD; 8767c478bd9Sstevel@tonic-gate goto again; 8777c478bd9Sstevel@tonic-gate } 8787c478bd9Sstevel@tonic-gate return; 8797c478bd9Sstevel@tonic-gate } 8807c478bd9Sstevel@tonic-gate writelog(LOG_WARNING, "write(rt_sock)" PAT ": %s ", 8817c478bd9Sstevel@tonic-gate ARGS, rip_strerror(errno)); 8827c478bd9Sstevel@tonic-gate return; 8837c478bd9Sstevel@tonic-gate } else if (cc != w.w_rtm.rtm_msglen) { 8847c478bd9Sstevel@tonic-gate msglog("write(rt_sock) wrote %ld instead of %d for" PAT, 8857c478bd9Sstevel@tonic-gate cc, w.w_rtm.rtm_msglen, ARGS); 8867c478bd9Sstevel@tonic-gate return; 8877c478bd9Sstevel@tonic-gate } 8887c478bd9Sstevel@tonic-gate } 8897c478bd9Sstevel@tonic-gate if (TRACEKERNEL) 8907c478bd9Sstevel@tonic-gate trace_misc("write kernel" PAT, ARGS); 8917c478bd9Sstevel@tonic-gate #undef PAT 8927c478bd9Sstevel@tonic-gate #undef ARGS 8937c478bd9Sstevel@tonic-gate } 8947c478bd9Sstevel@tonic-gate 8957c478bd9Sstevel@tonic-gate 8967c478bd9Sstevel@tonic-gate /* Hash table containing our image of the kernel forwarding table. */ 8977c478bd9Sstevel@tonic-gate #define KHASH_SIZE 71 /* should be prime */ 8987c478bd9Sstevel@tonic-gate #define KHASH(a, m) khash_bins[((a) ^ (m)) % KHASH_SIZE] 8997c478bd9Sstevel@tonic-gate static struct khash *khash_bins[KHASH_SIZE]; 9007c478bd9Sstevel@tonic-gate 9017c478bd9Sstevel@tonic-gate #define K_KEEP_LIM 30 /* k_keep */ 9027c478bd9Sstevel@tonic-gate 9037c478bd9Sstevel@tonic-gate static struct khash * 9047c478bd9Sstevel@tonic-gate kern_find(in_addr_t dst, in_addr_t mask, in_addr_t gate, 9057c478bd9Sstevel@tonic-gate struct interface *ifp, struct khash ***ppk) 9067c478bd9Sstevel@tonic-gate { 9077c478bd9Sstevel@tonic-gate struct khash *k, **pk; 9087c478bd9Sstevel@tonic-gate 9097c478bd9Sstevel@tonic-gate for (pk = &KHASH(dst, mask); (k = *pk) != NULL; pk = &k->k_next) { 9107c478bd9Sstevel@tonic-gate if (k->k_dst == dst && k->k_mask == mask && 9117c478bd9Sstevel@tonic-gate (gate == 0 || k->k_gate == gate) && 9127c478bd9Sstevel@tonic-gate (ifp == NULL || k->k_ifp == ifp)) { 9137c478bd9Sstevel@tonic-gate break; 9147c478bd9Sstevel@tonic-gate } 9157c478bd9Sstevel@tonic-gate } 9167c478bd9Sstevel@tonic-gate if (ppk != NULL) 9177c478bd9Sstevel@tonic-gate *ppk = pk; 9187c478bd9Sstevel@tonic-gate return (k); 9197c478bd9Sstevel@tonic-gate } 9207c478bd9Sstevel@tonic-gate 9217c478bd9Sstevel@tonic-gate 9227c478bd9Sstevel@tonic-gate /* 9237c478bd9Sstevel@tonic-gate * Find out if there is an alternate route to a given destination 9247c478bd9Sstevel@tonic-gate * off of a given interface. 9257c478bd9Sstevel@tonic-gate */ 9267c478bd9Sstevel@tonic-gate static struct khash * 9277c478bd9Sstevel@tonic-gate kern_alternate(in_addr_t dst, in_addr_t mask, in_addr_t gate, 9287c478bd9Sstevel@tonic-gate struct interface *ifp, struct khash ***ppk) 9297c478bd9Sstevel@tonic-gate { 9307c478bd9Sstevel@tonic-gate struct khash *k, **pk; 9317c478bd9Sstevel@tonic-gate 9327c478bd9Sstevel@tonic-gate for (pk = &KHASH(dst, mask); (k = *pk) != NULL; pk = &k->k_next) { 9337c478bd9Sstevel@tonic-gate if (k->k_dst == dst && k->k_mask == mask && 9347c478bd9Sstevel@tonic-gate (k->k_gate != gate) && 9357c478bd9Sstevel@tonic-gate (k->k_ifp == ifp)) { 9367c478bd9Sstevel@tonic-gate break; 9377c478bd9Sstevel@tonic-gate } 9387c478bd9Sstevel@tonic-gate } 9397c478bd9Sstevel@tonic-gate if (ppk != NULL) 9407c478bd9Sstevel@tonic-gate *ppk = pk; 9417c478bd9Sstevel@tonic-gate return (k); 9427c478bd9Sstevel@tonic-gate } 9437c478bd9Sstevel@tonic-gate 9447c478bd9Sstevel@tonic-gate static struct khash * 9457c478bd9Sstevel@tonic-gate kern_add(in_addr_t dst, uint32_t mask, in_addr_t gate, struct interface *ifp) 9467c478bd9Sstevel@tonic-gate { 9477c478bd9Sstevel@tonic-gate struct khash *k, **pk; 9487c478bd9Sstevel@tonic-gate 9497c478bd9Sstevel@tonic-gate k = kern_find(dst, mask, gate, ifp, &pk); 9507c478bd9Sstevel@tonic-gate if (k != NULL) 9517c478bd9Sstevel@tonic-gate return (k); 9527c478bd9Sstevel@tonic-gate 9537c478bd9Sstevel@tonic-gate k = rtmalloc(sizeof (*k), "kern_add"); 9547c478bd9Sstevel@tonic-gate 9557c478bd9Sstevel@tonic-gate (void) memset(k, 0, sizeof (*k)); 9567c478bd9Sstevel@tonic-gate k->k_dst = dst; 9577c478bd9Sstevel@tonic-gate k->k_mask = mask; 9587c478bd9Sstevel@tonic-gate k->k_state = KS_NEW; 9597c478bd9Sstevel@tonic-gate k->k_keep = now.tv_sec; 9607c478bd9Sstevel@tonic-gate k->k_gate = gate; 9617c478bd9Sstevel@tonic-gate k->k_ifp = ifp; 9627c478bd9Sstevel@tonic-gate *pk = k; 9637c478bd9Sstevel@tonic-gate 9647c478bd9Sstevel@tonic-gate return (k); 9657c478bd9Sstevel@tonic-gate } 9667c478bd9Sstevel@tonic-gate 9677c478bd9Sstevel@tonic-gate /* delete all khash entries that are wired through the interface ifp */ 9687c478bd9Sstevel@tonic-gate void 9697c478bd9Sstevel@tonic-gate kern_flush_ifp(struct interface *ifp) 9707c478bd9Sstevel@tonic-gate { 9717c478bd9Sstevel@tonic-gate struct khash *k, *kprev, *knext; 9727c478bd9Sstevel@tonic-gate int i; 9737c478bd9Sstevel@tonic-gate 9747c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 9757c478bd9Sstevel@tonic-gate kprev = NULL; 9767c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = knext) { 9777c478bd9Sstevel@tonic-gate knext = k->k_next; 9787c478bd9Sstevel@tonic-gate if (k->k_ifp == ifp) { 9797c478bd9Sstevel@tonic-gate if (kprev != NULL) 9807c478bd9Sstevel@tonic-gate kprev->k_next = k->k_next; 9817c478bd9Sstevel@tonic-gate else 9827c478bd9Sstevel@tonic-gate khash_bins[i] = k->k_next; 9837c478bd9Sstevel@tonic-gate free(k); 9847c478bd9Sstevel@tonic-gate continue; 9857c478bd9Sstevel@tonic-gate } 9867c478bd9Sstevel@tonic-gate kprev = k; 9877c478bd9Sstevel@tonic-gate } 9887c478bd9Sstevel@tonic-gate } 9897c478bd9Sstevel@tonic-gate } 9907c478bd9Sstevel@tonic-gate 9917c478bd9Sstevel@tonic-gate /* 9927c478bd9Sstevel@tonic-gate * rewire khash entries that currently go through oldifp to 9937c478bd9Sstevel@tonic-gate * go through newifp. 9947c478bd9Sstevel@tonic-gate */ 9957c478bd9Sstevel@tonic-gate void 9967c478bd9Sstevel@tonic-gate kern_rewire_ifp(struct interface *oldifp, struct interface *newifp) 9977c478bd9Sstevel@tonic-gate { 9987c478bd9Sstevel@tonic-gate struct khash *k; 9997c478bd9Sstevel@tonic-gate int i; 10007c478bd9Sstevel@tonic-gate 10017c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 10027c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k; k = k->k_next) { 10037c478bd9Sstevel@tonic-gate if (k->k_ifp == oldifp) { 10047c478bd9Sstevel@tonic-gate k->k_ifp = newifp; 10057c478bd9Sstevel@tonic-gate trace_misc("kern_rewire_ifp k 0x%lx " 10067c478bd9Sstevel@tonic-gate "from %s to %s", k, oldifp->int_name, 10077c478bd9Sstevel@tonic-gate newifp->int_name); 10087c478bd9Sstevel@tonic-gate } 10097c478bd9Sstevel@tonic-gate } 10107c478bd9Sstevel@tonic-gate } 10117c478bd9Sstevel@tonic-gate } 10127c478bd9Sstevel@tonic-gate 10137c478bd9Sstevel@tonic-gate /* 10147c478bd9Sstevel@tonic-gate * Check that a static route it is still in the daemon table, and not 10157c478bd9Sstevel@tonic-gate * deleted by interfaces coming and going. This is also the routine 10167c478bd9Sstevel@tonic-gate * responsible for adding new static routes to the daemon table. 10177c478bd9Sstevel@tonic-gate */ 10187c478bd9Sstevel@tonic-gate static void 10197c478bd9Sstevel@tonic-gate kern_check_static(struct khash *k, struct interface *ifp) 10207c478bd9Sstevel@tonic-gate { 10217c478bd9Sstevel@tonic-gate struct rt_entry *rt; 10227c478bd9Sstevel@tonic-gate struct rt_spare new; 10237c478bd9Sstevel@tonic-gate uint16_t rt_state = RS_STATIC; 10247c478bd9Sstevel@tonic-gate 10257c478bd9Sstevel@tonic-gate (void) memset(&new, 0, sizeof (new)); 10267c478bd9Sstevel@tonic-gate new.rts_ifp = ifp; 10277c478bd9Sstevel@tonic-gate new.rts_gate = k->k_gate; 10287c478bd9Sstevel@tonic-gate new.rts_router = (ifp != NULL) ? ifp->int_addr : loopaddr; 10297c478bd9Sstevel@tonic-gate new.rts_metric = k->k_metric; 10307c478bd9Sstevel@tonic-gate new.rts_time = now.tv_sec; 10317c478bd9Sstevel@tonic-gate new.rts_origin = RO_STATIC; 10327c478bd9Sstevel@tonic-gate 10337c478bd9Sstevel@tonic-gate rt = rtget(k->k_dst, k->k_mask); 10347c478bd9Sstevel@tonic-gate if ((ifp != NULL && !IS_IFF_ROUTING(ifp->int_if_flags)) || 10357c478bd9Sstevel@tonic-gate (k->k_state & KS_PRIVATE)) 10367c478bd9Sstevel@tonic-gate rt_state |= RS_NOPROPAGATE; 10377c478bd9Sstevel@tonic-gate 10387c478bd9Sstevel@tonic-gate if (rt != NULL) { 10397c478bd9Sstevel@tonic-gate if ((rt->rt_state & RS_STATIC) == 0) { 10407c478bd9Sstevel@tonic-gate /* 10417c478bd9Sstevel@tonic-gate * We are already tracking this dest/mask 10427c478bd9Sstevel@tonic-gate * via RIP/RDISC. Ignore the static route, 10437c478bd9Sstevel@tonic-gate * because we don't currently have a good 10447c478bd9Sstevel@tonic-gate * way to compare metrics on static routes 10457c478bd9Sstevel@tonic-gate * with rip metrics, and therefore cannot 10467c478bd9Sstevel@tonic-gate * mix and match the two. 10477c478bd9Sstevel@tonic-gate */ 10487c478bd9Sstevel@tonic-gate return; 10497c478bd9Sstevel@tonic-gate } 10507c478bd9Sstevel@tonic-gate rt_state |= rt->rt_state; 10517c478bd9Sstevel@tonic-gate if (rt->rt_state != rt_state) 10527c478bd9Sstevel@tonic-gate rtchange(rt, rt_state, &new, 0); 10537c478bd9Sstevel@tonic-gate } else { 10547c478bd9Sstevel@tonic-gate rtadd(k->k_dst, k->k_mask, rt_state, &new); 10557c478bd9Sstevel@tonic-gate } 10567c478bd9Sstevel@tonic-gate } 10577c478bd9Sstevel@tonic-gate 10587c478bd9Sstevel@tonic-gate 10597c478bd9Sstevel@tonic-gate /* operate on a kernel entry */ 10607c478bd9Sstevel@tonic-gate static void 10617c478bd9Sstevel@tonic-gate kern_ioctl(struct khash *k, 10627c478bd9Sstevel@tonic-gate int action, /* RTM_DELETE, etc */ 10637c478bd9Sstevel@tonic-gate int flags) 10647c478bd9Sstevel@tonic-gate { 10657c478bd9Sstevel@tonic-gate if (((k->k_state & (KS_IF|KS_PASSIVE)) == KS_IF) || 10667c478bd9Sstevel@tonic-gate (k->k_state & KS_DEPRE_IF)) { 10677c478bd9Sstevel@tonic-gate /* 10687c478bd9Sstevel@tonic-gate * Prevent execution of RTM_DELETE, RTM_ADD or 10697c478bd9Sstevel@tonic-gate * RTM_CHANGE of interface routes 10707c478bd9Sstevel@tonic-gate */ 10717c478bd9Sstevel@tonic-gate trace_act("Blocking execution of %s %s --> %s ", 10727c478bd9Sstevel@tonic-gate rtm_type_name(action), 10737c478bd9Sstevel@tonic-gate addrname(k->k_dst, k->k_mask, 0), naddr_ntoa(k->k_gate)); 10747c478bd9Sstevel@tonic-gate return; 10757c478bd9Sstevel@tonic-gate } 10767c478bd9Sstevel@tonic-gate 10777c478bd9Sstevel@tonic-gate switch (action) { 10787c478bd9Sstevel@tonic-gate case RTM_DELETE: 10797c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DYNAMIC; 10807c478bd9Sstevel@tonic-gate if (k->k_state & KS_DELETED) 10817c478bd9Sstevel@tonic-gate return; 10827c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETED; 10837c478bd9Sstevel@tonic-gate break; 10847c478bd9Sstevel@tonic-gate case RTM_ADD: 10857c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DELETED; 10867c478bd9Sstevel@tonic-gate break; 10877c478bd9Sstevel@tonic-gate case RTM_CHANGE: 10887c478bd9Sstevel@tonic-gate if (k->k_state & KS_DELETED) { 10897c478bd9Sstevel@tonic-gate action = RTM_ADD; 10907c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DELETED; 10917c478bd9Sstevel@tonic-gate } 10927c478bd9Sstevel@tonic-gate break; 10937c478bd9Sstevel@tonic-gate } 10947c478bd9Sstevel@tonic-gate 1095*d52135a8SSowmini Varadhan /* 1096*d52135a8SSowmini Varadhan * We should be doing an RTM_CHANGE for a KS_CHANGE, but 1097*d52135a8SSowmini Varadhan * RTM_CHANGE in the kernel is not currently multipath-aware and 1098*d52135a8SSowmini Varadhan * assumes that RTF_GATEWAY implies that the gateway of the route for 1099*d52135a8SSowmini Varadhan * dst has to be changed. Moreover, the only change that in.routed 1100*d52135a8SSowmini Varadhan * wants to implement is a change in the ks_metric (rmx_hopcount) 1101*d52135a8SSowmini Varadhan * which the kernel ignores anway, so we skip the RTM_CHANGE operation 1102*d52135a8SSowmini Varadhan * on the kernel 1103*d52135a8SSowmini Varadhan */ 1104*d52135a8SSowmini Varadhan if (action != RTM_CHANGE) { 1105*d52135a8SSowmini Varadhan rtioctl(action, k->k_dst, k->k_gate, k->k_mask, k->k_ifp, 1106*d52135a8SSowmini Varadhan k->k_metric, flags); 1107*d52135a8SSowmini Varadhan } 11087c478bd9Sstevel@tonic-gate } 11097c478bd9Sstevel@tonic-gate 11107c478bd9Sstevel@tonic-gate 11117c478bd9Sstevel@tonic-gate /* add a route the kernel told us */ 11127c478bd9Sstevel@tonic-gate static void 11137c478bd9Sstevel@tonic-gate rtm_add(struct rt_msghdr *rtm, 11147c478bd9Sstevel@tonic-gate struct rt_addrinfo *info, 11157c478bd9Sstevel@tonic-gate time_t keep, 11167c478bd9Sstevel@tonic-gate boolean_t interf_route, 11177c478bd9Sstevel@tonic-gate struct interface *ifptr) 11187c478bd9Sstevel@tonic-gate { 11197c478bd9Sstevel@tonic-gate struct khash *k; 11207c478bd9Sstevel@tonic-gate struct interface *ifp = ifptr; 11217c478bd9Sstevel@tonic-gate in_addr_t mask, gate = 0; 11227c478bd9Sstevel@tonic-gate static struct msg_limit msg_no_ifp; 11237c478bd9Sstevel@tonic-gate 11247c478bd9Sstevel@tonic-gate if (rtm->rtm_flags & RTF_HOST) { 11257c478bd9Sstevel@tonic-gate mask = HOST_MASK; 11267c478bd9Sstevel@tonic-gate } else if (INFO_MASK(info) != 0) { 11277c478bd9Sstevel@tonic-gate mask = ntohl(S_ADDR(INFO_MASK(info))); 11287c478bd9Sstevel@tonic-gate } else { 11297c478bd9Sstevel@tonic-gate writelog(LOG_WARNING, 11307c478bd9Sstevel@tonic-gate "ignore %s without mask", rtm_type_name(rtm->rtm_type)); 11317c478bd9Sstevel@tonic-gate return; 11327c478bd9Sstevel@tonic-gate } 11337c478bd9Sstevel@tonic-gate 11347c478bd9Sstevel@tonic-gate /* 11357c478bd9Sstevel@tonic-gate * Find the interface toward the gateway. 11367c478bd9Sstevel@tonic-gate */ 11377c478bd9Sstevel@tonic-gate if (INFO_GATE(info) != NULL) 11387c478bd9Sstevel@tonic-gate gate = S_ADDR(INFO_GATE(info)); 11397c478bd9Sstevel@tonic-gate 11407c478bd9Sstevel@tonic-gate if (ifp == NULL) { 11417c478bd9Sstevel@tonic-gate if (INFO_GATE(info) != NULL) 11427c478bd9Sstevel@tonic-gate ifp = iflookup(gate); 1143e1fa7f4dSsowmini if (ifp == NULL) { 11447c478bd9Sstevel@tonic-gate msglim(&msg_no_ifp, gate, 11457c478bd9Sstevel@tonic-gate "route %s --> %s nexthop is not directly connected", 11467c478bd9Sstevel@tonic-gate addrname(S_ADDR(INFO_DST(info)), mask, 0), 11477c478bd9Sstevel@tonic-gate naddr_ntoa(gate)); 1148e1fa7f4dSsowmini } 11497c478bd9Sstevel@tonic-gate } 11507c478bd9Sstevel@tonic-gate 11517c478bd9Sstevel@tonic-gate k = kern_add(S_ADDR(INFO_DST(info)), mask, gate, ifp); 11527c478bd9Sstevel@tonic-gate 11537c478bd9Sstevel@tonic-gate if (k->k_state & KS_NEW) 11547c478bd9Sstevel@tonic-gate k->k_keep = now.tv_sec+keep; 11557c478bd9Sstevel@tonic-gate if (INFO_GATE(info) == 0) { 11567c478bd9Sstevel@tonic-gate trace_act("note %s without gateway", 11577c478bd9Sstevel@tonic-gate rtm_type_name(rtm->rtm_type)); 11587c478bd9Sstevel@tonic-gate k->k_metric = HOPCNT_INFINITY; 11597c478bd9Sstevel@tonic-gate } else if (INFO_GATE(info)->ss_family != AF_INET) { 11607c478bd9Sstevel@tonic-gate trace_act("note %s with gateway AF=%d", 11617c478bd9Sstevel@tonic-gate rtm_type_name(rtm->rtm_type), 11627c478bd9Sstevel@tonic-gate INFO_GATE(info)->ss_family); 11637c478bd9Sstevel@tonic-gate k->k_metric = HOPCNT_INFINITY; 11647c478bd9Sstevel@tonic-gate } else { 11657c478bd9Sstevel@tonic-gate k->k_gate = S_ADDR(INFO_GATE(info)); 11667c478bd9Sstevel@tonic-gate k->k_metric = rtm->rtm_rmx.rmx_hopcount; 11677c478bd9Sstevel@tonic-gate if (k->k_metric < 0) 11687c478bd9Sstevel@tonic-gate k->k_metric = 0; 11697c478bd9Sstevel@tonic-gate else if (k->k_metric > HOPCNT_INFINITY-1) 11707c478bd9Sstevel@tonic-gate k->k_metric = HOPCNT_INFINITY-1; 11717c478bd9Sstevel@tonic-gate } 11727c478bd9Sstevel@tonic-gate 11737c478bd9Sstevel@tonic-gate if ((k->k_state & KS_NEW) && interf_route) { 11747c478bd9Sstevel@tonic-gate if (k->k_gate != 0 && findifaddr(k->k_gate) == NULL) 11757c478bd9Sstevel@tonic-gate k->k_state |= KS_DEPRE_IF; 11767c478bd9Sstevel@tonic-gate else 11777c478bd9Sstevel@tonic-gate k->k_state |= KS_IF; 11787c478bd9Sstevel@tonic-gate } 11797c478bd9Sstevel@tonic-gate 11807c478bd9Sstevel@tonic-gate k->k_state &= ~(KS_NEW | KS_DELETE | KS_ADD | KS_CHANGE | KS_DEL_ADD | 11817c478bd9Sstevel@tonic-gate KS_STATIC | KS_GATEWAY | KS_DELETED | KS_PRIVATE | KS_CHECK); 11827c478bd9Sstevel@tonic-gate if (rtm->rtm_flags & RTF_GATEWAY) 11837c478bd9Sstevel@tonic-gate k->k_state |= KS_GATEWAY; 11847c478bd9Sstevel@tonic-gate if (rtm->rtm_flags & RTF_STATIC) 11857c478bd9Sstevel@tonic-gate k->k_state |= KS_STATIC; 11867c478bd9Sstevel@tonic-gate if (rtm->rtm_flags & RTF_PRIVATE) 11877c478bd9Sstevel@tonic-gate k->k_state |= KS_PRIVATE; 11887c478bd9Sstevel@tonic-gate 11897c478bd9Sstevel@tonic-gate 11907c478bd9Sstevel@tonic-gate if (rtm->rtm_flags & (RTF_DYNAMIC | RTF_MODIFIED)) { 11917c478bd9Sstevel@tonic-gate if (INFO_AUTHOR(info) != 0 && 11927c478bd9Sstevel@tonic-gate INFO_AUTHOR(info)->ss_family == AF_INET) 11937c478bd9Sstevel@tonic-gate ifp = iflookup(S_ADDR(INFO_AUTHOR(info))); 11947c478bd9Sstevel@tonic-gate else 11957c478bd9Sstevel@tonic-gate ifp = NULL; 11967c478bd9Sstevel@tonic-gate if (should_supply(ifp) && (ifp == NULL || 11977c478bd9Sstevel@tonic-gate !(ifp->int_state & IS_REDIRECT_OK))) { 11987c478bd9Sstevel@tonic-gate /* 11997c478bd9Sstevel@tonic-gate * Routers are not supposed to listen to redirects, 12007c478bd9Sstevel@tonic-gate * so delete it if it came via an unknown interface 12017c478bd9Sstevel@tonic-gate * or the interface does not have special permission. 12027c478bd9Sstevel@tonic-gate */ 12037c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DYNAMIC; 12047c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 12057c478bd9Sstevel@tonic-gate LIM_SEC(need_kern, 0); 12067c478bd9Sstevel@tonic-gate trace_act("mark for deletion redirected %s --> %s" 12077c478bd9Sstevel@tonic-gate " via %s", 12087c478bd9Sstevel@tonic-gate addrname(k->k_dst, k->k_mask, 0), 12097c478bd9Sstevel@tonic-gate naddr_ntoa(k->k_gate), 12107c478bd9Sstevel@tonic-gate ifp ? ifp->int_name : "unknown interface"); 12117c478bd9Sstevel@tonic-gate } else { 12127c478bd9Sstevel@tonic-gate k->k_state |= KS_DYNAMIC; 12137c478bd9Sstevel@tonic-gate k->k_redirect_time = now.tv_sec; 12147c478bd9Sstevel@tonic-gate trace_act("accept redirected %s --> %s via %s", 12157c478bd9Sstevel@tonic-gate addrname(k->k_dst, k->k_mask, 0), 12167c478bd9Sstevel@tonic-gate naddr_ntoa(k->k_gate), 12177c478bd9Sstevel@tonic-gate ifp ? ifp->int_name : "unknown interface"); 12187c478bd9Sstevel@tonic-gate } 12197c478bd9Sstevel@tonic-gate return; 12207c478bd9Sstevel@tonic-gate } 12217c478bd9Sstevel@tonic-gate 12227c478bd9Sstevel@tonic-gate /* 12237c478bd9Sstevel@tonic-gate * If it is not a static route, quit until the next comparison 12247c478bd9Sstevel@tonic-gate * between the kernel and daemon tables, when it will be deleted. 12257c478bd9Sstevel@tonic-gate */ 12267c478bd9Sstevel@tonic-gate if (!(k->k_state & KS_STATIC)) { 12277c478bd9Sstevel@tonic-gate if (!(k->k_state & (KS_IF|KS_DEPRE_IF|KS_FILE))) 12287c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 12297c478bd9Sstevel@tonic-gate LIM_SEC(need_kern, k->k_keep); 12307c478bd9Sstevel@tonic-gate return; 12317c478bd9Sstevel@tonic-gate } 12327c478bd9Sstevel@tonic-gate 12337c478bd9Sstevel@tonic-gate /* 12347c478bd9Sstevel@tonic-gate * Put static routes with real metrics into the daemon table so 12357c478bd9Sstevel@tonic-gate * they can be advertised. 12367c478bd9Sstevel@tonic-gate */ 12377c478bd9Sstevel@tonic-gate 12387c478bd9Sstevel@tonic-gate kern_check_static(k, ifp); 12397c478bd9Sstevel@tonic-gate } 12407c478bd9Sstevel@tonic-gate 12417c478bd9Sstevel@tonic-gate 12427c478bd9Sstevel@tonic-gate /* deal with packet loss */ 12437c478bd9Sstevel@tonic-gate static void 12447c478bd9Sstevel@tonic-gate rtm_lose(struct rt_msghdr *rtm, struct rt_addrinfo *info) 12457c478bd9Sstevel@tonic-gate { 12461f465d43SSowmini Varadhan struct rt_spare new, *rts, *losing_rts = NULL; 12471f465d43SSowmini Varadhan struct rt_entry *rt; 12481f465d43SSowmini Varadhan int i, spares; 12491f465d43SSowmini Varadhan 12507c478bd9Sstevel@tonic-gate if (INFO_GATE(info) == NULL || INFO_GATE(info)->ss_family != AF_INET) { 12517c478bd9Sstevel@tonic-gate trace_act("ignore %s without gateway", 12527c478bd9Sstevel@tonic-gate rtm_type_name(rtm->rtm_type)); 12537c478bd9Sstevel@tonic-gate age(0); 12547c478bd9Sstevel@tonic-gate return; 12557c478bd9Sstevel@tonic-gate } 12567c478bd9Sstevel@tonic-gate 12571f465d43SSowmini Varadhan rt = rtfind(S_ADDR(INFO_DST(info))); 12581f465d43SSowmini Varadhan if (rt != NULL) { 12591f465d43SSowmini Varadhan spares = 0; 12601f465d43SSowmini Varadhan for (i = 0; i < rt->rt_num_spares; i++) { 12611f465d43SSowmini Varadhan rts = &rt->rt_spares[i]; 12621f465d43SSowmini Varadhan if (rts->rts_gate == S_ADDR(INFO_GATE(info))) { 12631f465d43SSowmini Varadhan losing_rts = rts; 12641f465d43SSowmini Varadhan continue; 12651f465d43SSowmini Varadhan } 12661f465d43SSowmini Varadhan if (rts->rts_gate != 0 && rts->rts_ifp != &dummy_ifp) 12671f465d43SSowmini Varadhan spares++; 12681f465d43SSowmini Varadhan } 12691f465d43SSowmini Varadhan } 12701f465d43SSowmini Varadhan if (rt == NULL || losing_rts == NULL) { 12711f465d43SSowmini Varadhan trace_act("Ignore RTM_LOSING because no route found" 12721f465d43SSowmini Varadhan " for %s through %s", 12731f465d43SSowmini Varadhan naddr_ntoa(S_ADDR(INFO_DST(info))), 12741f465d43SSowmini Varadhan naddr_ntoa(S_ADDR(INFO_GATE(info)))); 12751f465d43SSowmini Varadhan return; 12761f465d43SSowmini Varadhan } 12771f465d43SSowmini Varadhan if (spares == 0) { 12781f465d43SSowmini Varadhan trace_act("Got RTM_LOSING, but no alternatives to gw %s." 12791f465d43SSowmini Varadhan " deprecating route to metric 15", 12801f465d43SSowmini Varadhan naddr_ntoa(S_ADDR(INFO_GATE(info)))); 12811f465d43SSowmini Varadhan new = *losing_rts; 12821f465d43SSowmini Varadhan new.rts_metric = HOPCNT_INFINITY - 1; 12831f465d43SSowmini Varadhan rtchange(rt, rt->rt_state, &new, 0); 12841f465d43SSowmini Varadhan return; 12851f465d43SSowmini Varadhan } 12861f465d43SSowmini Varadhan trace_act("Got RTM_LOSING. Found a route with %d alternates", spares); 12877c478bd9Sstevel@tonic-gate if (rdisc_ok) 12887c478bd9Sstevel@tonic-gate rdisc_age(S_ADDR(INFO_GATE(info))); 12897c478bd9Sstevel@tonic-gate age(S_ADDR(INFO_GATE(info))); 12907c478bd9Sstevel@tonic-gate } 12917c478bd9Sstevel@tonic-gate 12927c478bd9Sstevel@tonic-gate 12937c478bd9Sstevel@tonic-gate /* 12947c478bd9Sstevel@tonic-gate * Make the gateway slot of an info structure point to something 12957c478bd9Sstevel@tonic-gate * useful. If it is not already useful, but it specifies an interface, 12967c478bd9Sstevel@tonic-gate * then fill in the sockaddr_in provided and point it there. 12977c478bd9Sstevel@tonic-gate */ 12987c478bd9Sstevel@tonic-gate static int 12997c478bd9Sstevel@tonic-gate get_info_gate(struct sockaddr_storage **ssp, struct sockaddr_in *sin) 13007c478bd9Sstevel@tonic-gate { 13017c478bd9Sstevel@tonic-gate struct sockaddr_dl *sdl = (struct sockaddr_dl *)*ssp; 13027c478bd9Sstevel@tonic-gate struct interface *ifp; 13037c478bd9Sstevel@tonic-gate 13047c478bd9Sstevel@tonic-gate if (sdl == NULL) 13057c478bd9Sstevel@tonic-gate return (0); 13067c478bd9Sstevel@tonic-gate if ((sdl)->sdl_family == AF_INET) 13077c478bd9Sstevel@tonic-gate return (1); 13087c478bd9Sstevel@tonic-gate if ((sdl)->sdl_family != AF_LINK) 13097c478bd9Sstevel@tonic-gate return (0); 13107c478bd9Sstevel@tonic-gate 13117c478bd9Sstevel@tonic-gate ifp = ifwithindex(sdl->sdl_index, _B_TRUE); 13127c478bd9Sstevel@tonic-gate if (ifp == NULL) 13137c478bd9Sstevel@tonic-gate return (0); 13147c478bd9Sstevel@tonic-gate 13157c478bd9Sstevel@tonic-gate sin->sin_addr.s_addr = ifp->int_addr; 13167c478bd9Sstevel@tonic-gate sin->sin_family = AF_INET; 13177c478bd9Sstevel@tonic-gate /* LINTED */ 13187c478bd9Sstevel@tonic-gate *ssp = (struct sockaddr_storage *)sin; 13197c478bd9Sstevel@tonic-gate 13207c478bd9Sstevel@tonic-gate return (1); 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate 13237c478bd9Sstevel@tonic-gate 13247c478bd9Sstevel@tonic-gate /* 13257c478bd9Sstevel@tonic-gate * Clean the kernel table by copying it to the daemon image. 13267c478bd9Sstevel@tonic-gate * Eventually the daemon will delete any extra routes. 13277c478bd9Sstevel@tonic-gate */ 13287c478bd9Sstevel@tonic-gate void 13297c478bd9Sstevel@tonic-gate sync_kern(void) 13307c478bd9Sstevel@tonic-gate { 13317c478bd9Sstevel@tonic-gate int i; 13327c478bd9Sstevel@tonic-gate struct khash *k; 13337c478bd9Sstevel@tonic-gate struct { 13347c478bd9Sstevel@tonic-gate struct T_optmgmt_req req; 13357c478bd9Sstevel@tonic-gate struct opthdr hdr; 13367c478bd9Sstevel@tonic-gate } req; 13377c478bd9Sstevel@tonic-gate union { 13387c478bd9Sstevel@tonic-gate struct T_optmgmt_ack ack; 13397c478bd9Sstevel@tonic-gate unsigned char space[64]; 13407c478bd9Sstevel@tonic-gate } ack; 13417c478bd9Sstevel@tonic-gate struct opthdr *rh; 13427c478bd9Sstevel@tonic-gate struct strbuf cbuf, dbuf; 13437c478bd9Sstevel@tonic-gate int ipfd, nroutes, flags, r; 13447c478bd9Sstevel@tonic-gate mib2_ipRouteEntry_t routes[8]; 13457c478bd9Sstevel@tonic-gate mib2_ipRouteEntry_t *rp; 13467c478bd9Sstevel@tonic-gate struct rt_msghdr rtm; 13477c478bd9Sstevel@tonic-gate struct rt_addrinfo info; 13487c478bd9Sstevel@tonic-gate struct sockaddr_in sin_dst; 13497c478bd9Sstevel@tonic-gate struct sockaddr_in sin_gate; 13507c478bd9Sstevel@tonic-gate struct sockaddr_in sin_mask; 13517c478bd9Sstevel@tonic-gate struct sockaddr_in sin_author; 13527c478bd9Sstevel@tonic-gate struct interface *ifp; 13537c478bd9Sstevel@tonic-gate char ifname[LIFNAMSIZ + 1]; 13547c478bd9Sstevel@tonic-gate 13557c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 13567c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = k->k_next) { 13577c478bd9Sstevel@tonic-gate if (!(k->k_state & (KS_IF|KS_DEPRE_IF))) 13587c478bd9Sstevel@tonic-gate k->k_state |= KS_CHECK; 13597c478bd9Sstevel@tonic-gate } 13607c478bd9Sstevel@tonic-gate } 13617c478bd9Sstevel@tonic-gate 13627c478bd9Sstevel@tonic-gate ipfd = open(IP_DEV_NAME, O_RDWR); 13637c478bd9Sstevel@tonic-gate if (ipfd == -1) { 13647c478bd9Sstevel@tonic-gate msglog("open " IP_DEV_NAME ": %s", rip_strerror(errno)); 13657c478bd9Sstevel@tonic-gate goto hash_clean; 13667c478bd9Sstevel@tonic-gate } 13677c478bd9Sstevel@tonic-gate 13687c478bd9Sstevel@tonic-gate req.req.PRIM_type = T_OPTMGMT_REQ; 13697c478bd9Sstevel@tonic-gate req.req.OPT_offset = (caddr_t)&req.hdr - (caddr_t)&req; 13707c478bd9Sstevel@tonic-gate req.req.OPT_length = sizeof (req.hdr); 13717c478bd9Sstevel@tonic-gate req.req.MGMT_flags = T_CURRENT; 13727c478bd9Sstevel@tonic-gate 13737c478bd9Sstevel@tonic-gate req.hdr.level = MIB2_IP; 13747c478bd9Sstevel@tonic-gate req.hdr.name = 0; 13757c478bd9Sstevel@tonic-gate req.hdr.len = 0; 13767c478bd9Sstevel@tonic-gate 13777c478bd9Sstevel@tonic-gate cbuf.buf = (caddr_t)&req; 13787c478bd9Sstevel@tonic-gate cbuf.len = sizeof (req); 13797c478bd9Sstevel@tonic-gate 13807c478bd9Sstevel@tonic-gate if (putmsg(ipfd, &cbuf, NULL, 0) == -1) { 13817c478bd9Sstevel@tonic-gate msglog("T_OPTMGMT_REQ putmsg: %s", rip_strerror(errno)); 13827c478bd9Sstevel@tonic-gate goto hash_clean; 13837c478bd9Sstevel@tonic-gate } 13847c478bd9Sstevel@tonic-gate 13857c478bd9Sstevel@tonic-gate for (;;) { 13867c478bd9Sstevel@tonic-gate cbuf.buf = (caddr_t)&ack; 13877c478bd9Sstevel@tonic-gate cbuf.maxlen = sizeof (ack); 13887c478bd9Sstevel@tonic-gate dbuf.buf = (caddr_t)routes; 13897c478bd9Sstevel@tonic-gate dbuf.maxlen = sizeof (routes); 13907c478bd9Sstevel@tonic-gate flags = 0; 13917c478bd9Sstevel@tonic-gate r = getmsg(ipfd, &cbuf, &dbuf, &flags); 13927c478bd9Sstevel@tonic-gate if (r == -1) { 13937c478bd9Sstevel@tonic-gate msglog("T_OPTMGMT_REQ getmsg: %s", rip_strerror(errno)); 13947c478bd9Sstevel@tonic-gate goto hash_clean; 13957c478bd9Sstevel@tonic-gate } 13967c478bd9Sstevel@tonic-gate 13977c478bd9Sstevel@tonic-gate if (cbuf.len < sizeof (struct T_optmgmt_ack) || 13987c478bd9Sstevel@tonic-gate ack.ack.PRIM_type != T_OPTMGMT_ACK || 13997c478bd9Sstevel@tonic-gate ack.ack.MGMT_flags != T_SUCCESS || 14007c478bd9Sstevel@tonic-gate ack.ack.OPT_length < sizeof (struct opthdr)) { 14017c478bd9Sstevel@tonic-gate msglog("bad T_OPTMGMT response; len=%d prim=%d " 14027c478bd9Sstevel@tonic-gate "flags=%d optlen=%d", cbuf.len, ack.ack.PRIM_type, 14037c478bd9Sstevel@tonic-gate ack.ack.MGMT_flags, ack.ack.OPT_length); 14047c478bd9Sstevel@tonic-gate goto hash_clean; 14057c478bd9Sstevel@tonic-gate } 14067c478bd9Sstevel@tonic-gate /* LINTED */ 14077c478bd9Sstevel@tonic-gate rh = (struct opthdr *)((caddr_t)&ack + ack.ack.OPT_offset); 14087c478bd9Sstevel@tonic-gate if (rh->level == 0 && rh->name == 0) { 14097c478bd9Sstevel@tonic-gate break; 14107c478bd9Sstevel@tonic-gate } 14117c478bd9Sstevel@tonic-gate if (rh->level != MIB2_IP || rh->name != MIB2_IP_21) { 14127c478bd9Sstevel@tonic-gate while (r == MOREDATA) { 14137c478bd9Sstevel@tonic-gate r = getmsg(ipfd, NULL, &dbuf, &flags); 14147c478bd9Sstevel@tonic-gate } 14157c478bd9Sstevel@tonic-gate continue; 14167c478bd9Sstevel@tonic-gate } 14177c478bd9Sstevel@tonic-gate break; 14187c478bd9Sstevel@tonic-gate } 14197c478bd9Sstevel@tonic-gate 14207c478bd9Sstevel@tonic-gate (void) memset(&rtm, 0, sizeof (rtm)); 14217c478bd9Sstevel@tonic-gate (void) memset(&info, 0, sizeof (info)); 14227c478bd9Sstevel@tonic-gate (void) memset(&sin_dst, 0, sizeof (sin_dst)); 14237c478bd9Sstevel@tonic-gate (void) memset(&sin_gate, 0, sizeof (sin_gate)); 14247c478bd9Sstevel@tonic-gate (void) memset(&sin_mask, 0, sizeof (sin_mask)); 14257c478bd9Sstevel@tonic-gate (void) memset(&sin_author, 0, sizeof (sin_author)); 14267c478bd9Sstevel@tonic-gate sin_dst.sin_family = AF_INET; 14277c478bd9Sstevel@tonic-gate /* LINTED */ 14287c478bd9Sstevel@tonic-gate info.rti_info[RTAX_DST] = (struct sockaddr_storage *)&sin_dst; 14297c478bd9Sstevel@tonic-gate sin_gate.sin_family = AF_INET; 14307c478bd9Sstevel@tonic-gate /* LINTED */ 14317c478bd9Sstevel@tonic-gate info.rti_info[RTAX_GATEWAY] = (struct sockaddr_storage *)&sin_gate; 14327c478bd9Sstevel@tonic-gate sin_mask.sin_family = AF_INET; 14337c478bd9Sstevel@tonic-gate /* LINTED */ 14347c478bd9Sstevel@tonic-gate info.rti_info[RTAX_NETMASK] = (struct sockaddr_storage *)&sin_mask; 14357c478bd9Sstevel@tonic-gate sin_dst.sin_family = AF_INET; 14367c478bd9Sstevel@tonic-gate /* LINTED */ 14377c478bd9Sstevel@tonic-gate info.rti_info[RTAX_AUTHOR] = (struct sockaddr_storage *)&sin_author; 14387c478bd9Sstevel@tonic-gate 14397c478bd9Sstevel@tonic-gate for (;;) { 14407c478bd9Sstevel@tonic-gate nroutes = dbuf.len / sizeof (mib2_ipRouteEntry_t); 14417c478bd9Sstevel@tonic-gate for (rp = routes; nroutes > 0; ++rp, nroutes--) { 14427c478bd9Sstevel@tonic-gate 14437c478bd9Sstevel@tonic-gate /* 14447c478bd9Sstevel@tonic-gate * Ignore IRE cache, broadcast, and local address 14457c478bd9Sstevel@tonic-gate * entries; they're not subject to routing socket 14467c478bd9Sstevel@tonic-gate * control. 14477c478bd9Sstevel@tonic-gate */ 14487c478bd9Sstevel@tonic-gate if (rp->ipRouteInfo.re_ire_type & 14497c478bd9Sstevel@tonic-gate (IRE_BROADCAST | IRE_CACHE | IRE_LOCAL)) 14507c478bd9Sstevel@tonic-gate continue; 14517c478bd9Sstevel@tonic-gate 1452f9aa3e1eSkcpoon /* ignore multicast and link local addresses */ 1453f9aa3e1eSkcpoon if (IN_MULTICAST(ntohl(rp->ipRouteDest)) || 1454f9aa3e1eSkcpoon IN_LINKLOCAL(ntohl(rp->ipRouteDest))) { 14557c478bd9Sstevel@tonic-gate continue; 1456f9aa3e1eSkcpoon } 14577c478bd9Sstevel@tonic-gate 14587c478bd9Sstevel@tonic-gate 14597c478bd9Sstevel@tonic-gate #ifdef DEBUG_KERNEL_ROUTE_READ 14607c478bd9Sstevel@tonic-gate (void) fprintf(stderr, "route type %d, ire type %08X, " 14617c478bd9Sstevel@tonic-gate "flags %08X: %s", rp->ipRouteType, 14627c478bd9Sstevel@tonic-gate rp->ipRouteInfo.re_ire_type, 14637c478bd9Sstevel@tonic-gate rp->ipRouteInfo.re_flags, 14647c478bd9Sstevel@tonic-gate naddr_ntoa(rp->ipRouteDest)); 14657c478bd9Sstevel@tonic-gate (void) fprintf(stderr, " %s", 14667c478bd9Sstevel@tonic-gate naddr_ntoa(rp->ipRouteMask)); 14677c478bd9Sstevel@tonic-gate (void) fprintf(stderr, " %s\n", 14687c478bd9Sstevel@tonic-gate naddr_ntoa(rp->ipRouteNextHop)); 14697c478bd9Sstevel@tonic-gate #endif 14707c478bd9Sstevel@tonic-gate 14717c478bd9Sstevel@tonic-gate /* Fake up the needed entries */ 14727c478bd9Sstevel@tonic-gate rtm.rtm_flags = rp->ipRouteInfo.re_flags; 14737c478bd9Sstevel@tonic-gate rtm.rtm_type = RTM_GET; 14747c478bd9Sstevel@tonic-gate rtm.rtm_rmx.rmx_hopcount = rp->ipRouteMetric1; 14757c478bd9Sstevel@tonic-gate 14767c478bd9Sstevel@tonic-gate (void) memset(ifname, 0, sizeof (ifname)); 14777c478bd9Sstevel@tonic-gate if (rp->ipRouteIfIndex.o_length < 14787c478bd9Sstevel@tonic-gate sizeof (rp->ipRouteIfIndex.o_bytes)) 14797c478bd9Sstevel@tonic-gate rp->ipRouteIfIndex.o_bytes[ 14807c478bd9Sstevel@tonic-gate rp->ipRouteIfIndex.o_length] = '\0'; 14817c478bd9Sstevel@tonic-gate (void) strncpy(ifname, 14827c478bd9Sstevel@tonic-gate rp->ipRouteIfIndex.o_bytes, 14837c478bd9Sstevel@tonic-gate sizeof (ifname)); 14847c478bd9Sstevel@tonic-gate 14857c478bd9Sstevel@tonic-gate /* 14867c478bd9Sstevel@tonic-gate * First try to match up on gwkludge entries 1487982ec2c2SRishi Srivatsavai * before trying to match ifp by name/nexthop. 14887c478bd9Sstevel@tonic-gate */ 14897c478bd9Sstevel@tonic-gate if ((ifp = gwkludge_iflookup(rp->ipRouteDest, 1490e79ff038Sbw rp->ipRouteNextHop, 1491e1fa7f4dSsowmini ntohl(rp->ipRouteMask))) == NULL) { 1492982ec2c2SRishi Srivatsavai ifp = lifp_iflookup(rp->ipRouteNextHop, ifname); 1493982ec2c2SRishi Srivatsavai } 1494982ec2c2SRishi Srivatsavai 1495982ec2c2SRishi Srivatsavai #ifdef DEBUG_KERNEL_ROUTE_READ 1496982ec2c2SRishi Srivatsavai if (ifp != NULL) { 1497982ec2c2SRishi Srivatsavai (void) fprintf(stderr, " found interface" 1498982ec2c2SRishi Srivatsavai " %-4s #%-3d ", ifp->int_name, 1499982ec2c2SRishi Srivatsavai (ifp->int_phys != NULL) ? 1500982ec2c2SRishi Srivatsavai ifp->int_phys->phyi_index : 0); 1501982ec2c2SRishi Srivatsavai (void) fprintf(stderr, "%-15s-->%-15s \n", 1502982ec2c2SRishi Srivatsavai naddr_ntoa(ifp->int_addr), 1503982ec2c2SRishi Srivatsavai addrname(((ifp->int_if_flags & 1504982ec2c2SRishi Srivatsavai IFF_POINTOPOINT) ? 1505982ec2c2SRishi Srivatsavai ifp->int_dstaddr : htonl(ifp->int_net)), 1506982ec2c2SRishi Srivatsavai ifp->int_mask, 1)); 1507e1fa7f4dSsowmini } 1508982ec2c2SRishi Srivatsavai #endif 15097c478bd9Sstevel@tonic-gate 15107c478bd9Sstevel@tonic-gate info.rti_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 15117c478bd9Sstevel@tonic-gate if (rp->ipRouteInfo.re_ire_type & IRE_HOST_REDIRECT) 15127c478bd9Sstevel@tonic-gate info.rti_addrs |= RTA_AUTHOR; 15137c478bd9Sstevel@tonic-gate sin_dst.sin_addr.s_addr = rp->ipRouteDest; 15147c478bd9Sstevel@tonic-gate sin_gate.sin_addr.s_addr = rp->ipRouteNextHop; 15157c478bd9Sstevel@tonic-gate sin_mask.sin_addr.s_addr = rp->ipRouteMask; 15167c478bd9Sstevel@tonic-gate sin_author.sin_addr.s_addr = 15177c478bd9Sstevel@tonic-gate rp->ipRouteInfo.re_src_addr; 15187c478bd9Sstevel@tonic-gate 15197c478bd9Sstevel@tonic-gate /* 15207c478bd9Sstevel@tonic-gate * Note static routes and interface routes, and also 15217c478bd9Sstevel@tonic-gate * preload the image of the kernel table so that 15227c478bd9Sstevel@tonic-gate * we can later clean it, as well as avoid making 15237c478bd9Sstevel@tonic-gate * unneeded changes. Keep the old kernel routes for a 15247c478bd9Sstevel@tonic-gate * few seconds to allow a RIP or router-discovery 15257c478bd9Sstevel@tonic-gate * response to be heard. 15267c478bd9Sstevel@tonic-gate */ 15277c478bd9Sstevel@tonic-gate rtm_add(&rtm, &info, MAX_WAITTIME, 15287c478bd9Sstevel@tonic-gate ((rp->ipRouteInfo.re_ire_type & 15297c478bd9Sstevel@tonic-gate (IRE_INTERFACE|IRE_LOOPBACK)) != 0), ifp); 15307c478bd9Sstevel@tonic-gate } 15317c478bd9Sstevel@tonic-gate if (r == 0) { 15327c478bd9Sstevel@tonic-gate break; 15337c478bd9Sstevel@tonic-gate } 15347c478bd9Sstevel@tonic-gate r = getmsg(ipfd, NULL, &dbuf, &flags); 15357c478bd9Sstevel@tonic-gate } 15367c478bd9Sstevel@tonic-gate 15377c478bd9Sstevel@tonic-gate hash_clean: 15387c478bd9Sstevel@tonic-gate if (ipfd != -1) 15397c478bd9Sstevel@tonic-gate (void) close(ipfd); 15407c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 15417c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = k->k_next) { 15427c478bd9Sstevel@tonic-gate 15437c478bd9Sstevel@tonic-gate /* 15447c478bd9Sstevel@tonic-gate * KS_DELETED routes have been removed from the 15457c478bd9Sstevel@tonic-gate * kernel, but we keep them around for reasons 15467c478bd9Sstevel@tonic-gate * stated in del_static(), so we skip the check 15477c478bd9Sstevel@tonic-gate * for KS_DELETED routes here. 15487c478bd9Sstevel@tonic-gate */ 15497c478bd9Sstevel@tonic-gate if ((k->k_state & (KS_CHECK|KS_DELETED)) == KS_CHECK) { 15507c478bd9Sstevel@tonic-gate 1551f9aa3e1eSkcpoon if (!(k->k_state & KS_DYNAMIC)) { 1552f9aa3e1eSkcpoon writelog(LOG_WARNING, 1553f9aa3e1eSkcpoon "%s --> %s disappeared from kernel", 1554f9aa3e1eSkcpoon addrname(k->k_dst, k->k_mask, 0), 1555f9aa3e1eSkcpoon naddr_ntoa(k->k_gate)); 1556f9aa3e1eSkcpoon } 15577c478bd9Sstevel@tonic-gate del_static(k->k_dst, k->k_mask, k->k_gate, 15587c478bd9Sstevel@tonic-gate k->k_ifp, 1); 15597c478bd9Sstevel@tonic-gate 15607c478bd9Sstevel@tonic-gate } 15617c478bd9Sstevel@tonic-gate } 15627c478bd9Sstevel@tonic-gate } 15637c478bd9Sstevel@tonic-gate } 15647c478bd9Sstevel@tonic-gate 15657c478bd9Sstevel@tonic-gate 15667c478bd9Sstevel@tonic-gate /* Listen to announcements from the kernel */ 15677c478bd9Sstevel@tonic-gate void 15687c478bd9Sstevel@tonic-gate read_rt(void) 15697c478bd9Sstevel@tonic-gate { 15707c478bd9Sstevel@tonic-gate long cc; 15717c478bd9Sstevel@tonic-gate struct interface *ifp; 15727c478bd9Sstevel@tonic-gate struct sockaddr_in gate_sin; 15737c478bd9Sstevel@tonic-gate in_addr_t mask, gate; 15747c478bd9Sstevel@tonic-gate union { 15757c478bd9Sstevel@tonic-gate struct { 15767c478bd9Sstevel@tonic-gate struct rt_msghdr rtm; 15777c478bd9Sstevel@tonic-gate struct sockaddr_storage addrs[RTA_NUMBITS]; 15787c478bd9Sstevel@tonic-gate } r; 15797c478bd9Sstevel@tonic-gate struct if_msghdr ifm; 15807c478bd9Sstevel@tonic-gate } m; 15817c478bd9Sstevel@tonic-gate char str[100], *strp; 15827c478bd9Sstevel@tonic-gate struct rt_addrinfo info; 15837c478bd9Sstevel@tonic-gate 15847c478bd9Sstevel@tonic-gate 15857c478bd9Sstevel@tonic-gate for (;;) { 15867c478bd9Sstevel@tonic-gate cc = read(rt_sock, &m, sizeof (m)); 15877c478bd9Sstevel@tonic-gate if (cc <= 0) { 15887c478bd9Sstevel@tonic-gate if (cc < 0 && errno != EWOULDBLOCK) 15897c478bd9Sstevel@tonic-gate LOGERR("read(rt_sock)"); 15907c478bd9Sstevel@tonic-gate return; 15917c478bd9Sstevel@tonic-gate } 15927c478bd9Sstevel@tonic-gate 15937c478bd9Sstevel@tonic-gate if (TRACERTS) 15947c478bd9Sstevel@tonic-gate dump_rt_msg("read", &m.r.rtm, cc); 15957c478bd9Sstevel@tonic-gate 15967c478bd9Sstevel@tonic-gate if (cc < m.r.rtm.rtm_msglen) { 15977c478bd9Sstevel@tonic-gate msglog("routing message truncated (%d < %d)", 15987c478bd9Sstevel@tonic-gate cc, m.r.rtm.rtm_msglen); 15997c478bd9Sstevel@tonic-gate } 16007c478bd9Sstevel@tonic-gate 16017c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_version != RTM_VERSION) { 16027c478bd9Sstevel@tonic-gate msglog("bogus routing message version %d", 16037c478bd9Sstevel@tonic-gate m.r.rtm.rtm_version); 16047c478bd9Sstevel@tonic-gate continue; 16057c478bd9Sstevel@tonic-gate } 16067c478bd9Sstevel@tonic-gate 16077c478bd9Sstevel@tonic-gate ifp = NULL; 16087c478bd9Sstevel@tonic-gate 16097c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_type == RTM_IFINFO || 16107c478bd9Sstevel@tonic-gate m.r.rtm.rtm_type == RTM_NEWADDR || 16117c478bd9Sstevel@tonic-gate m.r.rtm.rtm_type == RTM_DELADDR) { 16127c478bd9Sstevel@tonic-gate strp = if_bit_string(m.ifm.ifm_flags, _B_TRUE); 16137c478bd9Sstevel@tonic-gate if (strp == NULL) { 16147c478bd9Sstevel@tonic-gate strp = str; 16157c478bd9Sstevel@tonic-gate (void) sprintf(str, "%#x", m.ifm.ifm_flags); 16167c478bd9Sstevel@tonic-gate } 16177c478bd9Sstevel@tonic-gate ifp = ifwithindex(m.ifm.ifm_index, 16187c478bd9Sstevel@tonic-gate m.r.rtm.rtm_type != RTM_DELADDR); 16197c478bd9Sstevel@tonic-gate if (ifp == NULL) { 16207c478bd9Sstevel@tonic-gate char ifname[LIFNAMSIZ], *ifnamep; 16217c478bd9Sstevel@tonic-gate 16227c478bd9Sstevel@tonic-gate ifnamep = if_indextoname(m.ifm.ifm_index, 16237c478bd9Sstevel@tonic-gate ifname); 16247c478bd9Sstevel@tonic-gate if (ifnamep == NULL) { 16257c478bd9Sstevel@tonic-gate trace_act("note %s with flags %s" 16267c478bd9Sstevel@tonic-gate " for unknown interface index #%d", 16277c478bd9Sstevel@tonic-gate rtm_type_name(m.r.rtm.rtm_type), 16287c478bd9Sstevel@tonic-gate strp, m.ifm.ifm_index); 16297c478bd9Sstevel@tonic-gate } else { 16307c478bd9Sstevel@tonic-gate trace_act("note %s with flags %s" 16317c478bd9Sstevel@tonic-gate " for unknown interface %s", 16327c478bd9Sstevel@tonic-gate rtm_type_name(m.r.rtm.rtm_type), 16337c478bd9Sstevel@tonic-gate strp, ifnamep); 16347c478bd9Sstevel@tonic-gate } 16357c478bd9Sstevel@tonic-gate } else { 16367c478bd9Sstevel@tonic-gate trace_act("note %s with flags %s for %s", 16377c478bd9Sstevel@tonic-gate rtm_type_name(m.r.rtm.rtm_type), 16387c478bd9Sstevel@tonic-gate strp, ifp->int_name); 16397c478bd9Sstevel@tonic-gate } 16407c478bd9Sstevel@tonic-gate if (strp != str) 16417c478bd9Sstevel@tonic-gate free(strp); 16427c478bd9Sstevel@tonic-gate 16437c478bd9Sstevel@tonic-gate /* 16447c478bd9Sstevel@tonic-gate * After being informed of a change to an interface, 16457c478bd9Sstevel@tonic-gate * check them all now if the check would otherwise 16467c478bd9Sstevel@tonic-gate * be a long time from now, if the interface is 16477c478bd9Sstevel@tonic-gate * not known, or if the interface has been turned 16487c478bd9Sstevel@tonic-gate * off or on. 16497c478bd9Sstevel@tonic-gate */ 16507c478bd9Sstevel@tonic-gate if (ifscan_timer.tv_sec-now.tv_sec >= 16517c478bd9Sstevel@tonic-gate CHECK_BAD_INTERVAL || ifp == NULL || 16527c478bd9Sstevel@tonic-gate ((ifp->int_if_flags ^ m.ifm.ifm_flags) & 1653f9aa3e1eSkcpoon IFF_UP) != 0) 16547c478bd9Sstevel@tonic-gate ifscan_timer.tv_sec = now.tv_sec; 16557c478bd9Sstevel@tonic-gate continue; 16561cb875aeSCathy Zhou } else if (m.r.rtm.rtm_type == RTM_CHGADDR || 16571cb875aeSCathy Zhou m.r.rtm.rtm_type == RTM_FREEADDR) { 16581cb875aeSCathy Zhou continue; 16597c478bd9Sstevel@tonic-gate } else { 16607c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_index != 0) 16617c478bd9Sstevel@tonic-gate ifp = ifwithindex(m.r.rtm.rtm_index, 1); 16627c478bd9Sstevel@tonic-gate } 16637c478bd9Sstevel@tonic-gate 16647c478bd9Sstevel@tonic-gate (void) strlcpy(str, rtm_type_name(m.r.rtm.rtm_type), 16657c478bd9Sstevel@tonic-gate sizeof (str)); 16667c478bd9Sstevel@tonic-gate strp = &str[strlen(str)]; 16677c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_type <= RTM_CHANGE) 16687c478bd9Sstevel@tonic-gate strp += snprintf(strp, sizeof (str) - (strp - str), 16697c478bd9Sstevel@tonic-gate " from pid %d", (int)m.r.rtm.rtm_pid); 16707c478bd9Sstevel@tonic-gate 16717c478bd9Sstevel@tonic-gate /* LINTED */ 16727c478bd9Sstevel@tonic-gate (void) rt_xaddrs(&info, (struct sockaddr_storage *)(&m.r.rtm + 16737c478bd9Sstevel@tonic-gate 1), (char *)&m + cc, m.r.rtm.rtm_addrs); 16747c478bd9Sstevel@tonic-gate 16757c478bd9Sstevel@tonic-gate if (INFO_DST(&info) == 0) { 16767c478bd9Sstevel@tonic-gate trace_act("ignore %s without dst", str); 16777c478bd9Sstevel@tonic-gate continue; 16787c478bd9Sstevel@tonic-gate } 16797c478bd9Sstevel@tonic-gate 16807c478bd9Sstevel@tonic-gate if (INFO_DST(&info)->ss_family != AF_INET) { 16817c478bd9Sstevel@tonic-gate trace_act("ignore %s for AF %d", str, 16827c478bd9Sstevel@tonic-gate INFO_DST(&info)->ss_family); 16837c478bd9Sstevel@tonic-gate continue; 16847c478bd9Sstevel@tonic-gate } 16857c478bd9Sstevel@tonic-gate 16867c478bd9Sstevel@tonic-gate mask = ((INFO_MASK(&info) != 0) ? 16877c478bd9Sstevel@tonic-gate ntohl(S_ADDR(INFO_MASK(&info))) : 16887c478bd9Sstevel@tonic-gate (m.r.rtm.rtm_flags & RTF_HOST) ? 16897c478bd9Sstevel@tonic-gate HOST_MASK : std_mask(S_ADDR(INFO_DST(&info)))); 16907c478bd9Sstevel@tonic-gate 16917c478bd9Sstevel@tonic-gate strp += snprintf(strp, sizeof (str) - (strp - str), ": %s", 16927c478bd9Sstevel@tonic-gate addrname(S_ADDR(INFO_DST(&info)), mask, 0)); 16937c478bd9Sstevel@tonic-gate 1694f9aa3e1eSkcpoon if (IN_MULTICAST(ntohl(S_ADDR(INFO_DST(&info)))) || 1695f9aa3e1eSkcpoon IN_LINKLOCAL(ntohl(S_ADDR(INFO_DST(&info))))) { 1696f9aa3e1eSkcpoon trace_act("ignore multicast/link local %s", str); 16977c478bd9Sstevel@tonic-gate continue; 16987c478bd9Sstevel@tonic-gate } 16997c478bd9Sstevel@tonic-gate 17007c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_flags & RTF_LLINFO) { 17017c478bd9Sstevel@tonic-gate trace_act("ignore ARP %s", str); 17027c478bd9Sstevel@tonic-gate continue; 17037c478bd9Sstevel@tonic-gate } 17047c478bd9Sstevel@tonic-gate 17057c478bd9Sstevel@tonic-gate if (get_info_gate(&INFO_GATE(&info), &gate_sin)) { 17067c478bd9Sstevel@tonic-gate gate = S_ADDR(INFO_GATE(&info)); 17077c478bd9Sstevel@tonic-gate strp += snprintf(strp, sizeof (str) - (strp - str), 17087c478bd9Sstevel@tonic-gate " --> %s", naddr_ntoa(gate)); 17097c478bd9Sstevel@tonic-gate } else { 17107c478bd9Sstevel@tonic-gate gate = 0; 17117c478bd9Sstevel@tonic-gate } 17127c478bd9Sstevel@tonic-gate 17137c478bd9Sstevel@tonic-gate if (INFO_AUTHOR(&info) != 0) 17147c478bd9Sstevel@tonic-gate strp += snprintf(strp, sizeof (str) - (strp - str), 17157c478bd9Sstevel@tonic-gate " by authority of %s", 17167c478bd9Sstevel@tonic-gate saddr_ntoa(INFO_AUTHOR(&info))); 17177c478bd9Sstevel@tonic-gate 17187c478bd9Sstevel@tonic-gate switch (m.r.rtm.rtm_type) { 17197c478bd9Sstevel@tonic-gate case RTM_ADD: 17207c478bd9Sstevel@tonic-gate case RTM_CHANGE: 17217c478bd9Sstevel@tonic-gate case RTM_REDIRECT: 17227c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_errno != 0) { 17237c478bd9Sstevel@tonic-gate trace_act("ignore %s with \"%s\" error", 17247c478bd9Sstevel@tonic-gate str, rip_strerror(m.r.rtm.rtm_errno)); 17257c478bd9Sstevel@tonic-gate } else { 17267c478bd9Sstevel@tonic-gate trace_act("%s", str); 17277c478bd9Sstevel@tonic-gate rtm_add(&m.r.rtm, &info, 0, 17287c478bd9Sstevel@tonic-gate !(m.r.rtm.rtm_flags & RTF_GATEWAY) && 17297c478bd9Sstevel@tonic-gate m.r.rtm.rtm_type != RTM_REDIRECT, ifp); 17307c478bd9Sstevel@tonic-gate 17317c478bd9Sstevel@tonic-gate } 17327c478bd9Sstevel@tonic-gate break; 17337c478bd9Sstevel@tonic-gate 17347c478bd9Sstevel@tonic-gate case RTM_DELETE: 17357c478bd9Sstevel@tonic-gate if (m.r.rtm.rtm_errno != 0 && 17367c478bd9Sstevel@tonic-gate m.r.rtm.rtm_errno != ESRCH) { 17377c478bd9Sstevel@tonic-gate trace_act("ignore %s with \"%s\" error", 17387c478bd9Sstevel@tonic-gate str, rip_strerror(m.r.rtm.rtm_errno)); 17397c478bd9Sstevel@tonic-gate } else { 17407c478bd9Sstevel@tonic-gate trace_act("%s", str); 17417c478bd9Sstevel@tonic-gate del_static(S_ADDR(INFO_DST(&info)), mask, 17427c478bd9Sstevel@tonic-gate gate, ifp, 1); 17437c478bd9Sstevel@tonic-gate } 17447c478bd9Sstevel@tonic-gate break; 17457c478bd9Sstevel@tonic-gate 17467c478bd9Sstevel@tonic-gate case RTM_LOSING: 17477c478bd9Sstevel@tonic-gate trace_act("%s", str); 17487c478bd9Sstevel@tonic-gate rtm_lose(&m.r.rtm, &info); 17497c478bd9Sstevel@tonic-gate break; 17507c478bd9Sstevel@tonic-gate 17517c478bd9Sstevel@tonic-gate default: 17527c478bd9Sstevel@tonic-gate trace_act("ignore %s", str); 17537c478bd9Sstevel@tonic-gate break; 17547c478bd9Sstevel@tonic-gate } 17557c478bd9Sstevel@tonic-gate } 17567c478bd9Sstevel@tonic-gate } 17577c478bd9Sstevel@tonic-gate 17587c478bd9Sstevel@tonic-gate 17597c478bd9Sstevel@tonic-gate /* 17607c478bd9Sstevel@tonic-gate * Disassemble a routing message. The result is an array of pointers 17617c478bd9Sstevel@tonic-gate * to sockaddr_storage structures stored in the info argument. 17627c478bd9Sstevel@tonic-gate * 17637c478bd9Sstevel@tonic-gate * ss is a pointer to the beginning of the data following the 17647c478bd9Sstevel@tonic-gate * rt_msghdr contained in the routing socket message, which consists 17657c478bd9Sstevel@tonic-gate * of a string of concatenated sockaddr structure of different types. 176645916cd2Sjpk * 176745916cd2Sjpk * Extended attributes can be appended at the end of the list. 17687c478bd9Sstevel@tonic-gate */ 17697c478bd9Sstevel@tonic-gate static int 17707c478bd9Sstevel@tonic-gate rt_xaddrs(struct rt_addrinfo *info, 17717c478bd9Sstevel@tonic-gate struct sockaddr_storage *ss, 17727c478bd9Sstevel@tonic-gate char *lim, 17737c478bd9Sstevel@tonic-gate int addrs) 17747c478bd9Sstevel@tonic-gate { 17757c478bd9Sstevel@tonic-gate int retv = 0; 17767c478bd9Sstevel@tonic-gate int i; 17777c478bd9Sstevel@tonic-gate int abit; 17787c478bd9Sstevel@tonic-gate int complaints; 17797c478bd9Sstevel@tonic-gate static int prev_complaints; 17807c478bd9Sstevel@tonic-gate 17817c478bd9Sstevel@tonic-gate #define XBAD_AF 0x1 17827c478bd9Sstevel@tonic-gate #define XBAD_SHORT 0x2 17837c478bd9Sstevel@tonic-gate #define XBAD_LONG 0x4 17847c478bd9Sstevel@tonic-gate 17857c478bd9Sstevel@tonic-gate (void) memset(info, 0, sizeof (*info)); 17867c478bd9Sstevel@tonic-gate info->rti_addrs = addrs; 17877c478bd9Sstevel@tonic-gate complaints = 0; 17887c478bd9Sstevel@tonic-gate for (i = 0, abit = 1; i < RTAX_MAX && (char *)ss < lim; 17897c478bd9Sstevel@tonic-gate i++, abit <<= 1) { 17907c478bd9Sstevel@tonic-gate if ((addrs & abit) == 0) 17917c478bd9Sstevel@tonic-gate continue; 17927c478bd9Sstevel@tonic-gate info->rti_info[i] = ss; 17937c478bd9Sstevel@tonic-gate /* Horrible interface here */ 17947c478bd9Sstevel@tonic-gate switch (ss->ss_family) { 17957c478bd9Sstevel@tonic-gate case AF_UNIX: 17967c478bd9Sstevel@tonic-gate /* LINTED */ 17977c478bd9Sstevel@tonic-gate ss = (struct sockaddr_storage *)( 17987c478bd9Sstevel@tonic-gate (struct sockaddr_un *)ss + 1); 17997c478bd9Sstevel@tonic-gate break; 18007c478bd9Sstevel@tonic-gate case AF_INET: 18017c478bd9Sstevel@tonic-gate /* LINTED */ 18027c478bd9Sstevel@tonic-gate ss = (struct sockaddr_storage *)( 18037c478bd9Sstevel@tonic-gate (struct sockaddr_in *)ss + 1); 18047c478bd9Sstevel@tonic-gate break; 18057c478bd9Sstevel@tonic-gate case AF_LINK: 18067c478bd9Sstevel@tonic-gate /* LINTED */ 18077c478bd9Sstevel@tonic-gate ss = (struct sockaddr_storage *)( 18087c478bd9Sstevel@tonic-gate (struct sockaddr_dl *)ss + 1); 18097c478bd9Sstevel@tonic-gate break; 18107c478bd9Sstevel@tonic-gate case AF_INET6: 18117c478bd9Sstevel@tonic-gate /* LINTED */ 18127c478bd9Sstevel@tonic-gate ss = (struct sockaddr_storage *)( 18137c478bd9Sstevel@tonic-gate (struct sockaddr_in6 *)ss + 1); 18147c478bd9Sstevel@tonic-gate break; 18157c478bd9Sstevel@tonic-gate default: 18167c478bd9Sstevel@tonic-gate if (!(prev_complaints & XBAD_AF)) 18177c478bd9Sstevel@tonic-gate writelog(LOG_WARNING, 18187c478bd9Sstevel@tonic-gate "unknown address family %d " 18197c478bd9Sstevel@tonic-gate "encountered", ss->ss_family); 18207c478bd9Sstevel@tonic-gate if (complaints & XBAD_AF) 18217c478bd9Sstevel@tonic-gate goto xaddr_done; 18227c478bd9Sstevel@tonic-gate /* LINTED */ 18237c478bd9Sstevel@tonic-gate ss = (struct sockaddr_storage *)( 18247c478bd9Sstevel@tonic-gate (struct sockaddr *)ss + 1); 18257c478bd9Sstevel@tonic-gate complaints |= XBAD_AF; 18267c478bd9Sstevel@tonic-gate info->rti_addrs &= abit - 1; 18277c478bd9Sstevel@tonic-gate addrs = info->rti_addrs; 18287c478bd9Sstevel@tonic-gate retv = -1; 18297c478bd9Sstevel@tonic-gate break; 18307c478bd9Sstevel@tonic-gate } 18317c478bd9Sstevel@tonic-gate if ((char *)ss > lim) { 18327c478bd9Sstevel@tonic-gate if (!(prev_complaints & XBAD_SHORT)) 18337c478bd9Sstevel@tonic-gate msglog("sockaddr %d too short by %d " 18347c478bd9Sstevel@tonic-gate "bytes", i + 1, (char *)ss - lim); 18357c478bd9Sstevel@tonic-gate complaints |= XBAD_SHORT; 18367c478bd9Sstevel@tonic-gate info->rti_info[i] = NULL; 18377c478bd9Sstevel@tonic-gate info->rti_addrs &= abit - 1; 18387c478bd9Sstevel@tonic-gate retv = -1; 18397c478bd9Sstevel@tonic-gate goto xaddr_done; 18407c478bd9Sstevel@tonic-gate } 18417c478bd9Sstevel@tonic-gate } 184245916cd2Sjpk 184345916cd2Sjpk while (((char *)ss + sizeof (rtm_ext_t)) <= lim) { 184445916cd2Sjpk rtm_ext_t *tp; 184545916cd2Sjpk char *nxt; 184645916cd2Sjpk 184745916cd2Sjpk /* LINTED: alignment */ 184845916cd2Sjpk tp = (rtm_ext_t *)ss; 184945916cd2Sjpk nxt = (char *)(tp + 1) + tp->rtmex_len; 185045916cd2Sjpk 185145916cd2Sjpk if (!IS_P2ALIGNED(tp->rtmex_len, sizeof (uint32_t)) || 185245916cd2Sjpk nxt > lim) { 185345916cd2Sjpk break; 185445916cd2Sjpk } 185545916cd2Sjpk 185645916cd2Sjpk /* LINTED: alignment */ 185745916cd2Sjpk ss = (struct sockaddr_storage *)nxt; 185845916cd2Sjpk } 185945916cd2Sjpk 18607c478bd9Sstevel@tonic-gate if ((char *)ss != lim) { 186145916cd2Sjpk if ((char *)ss > lim) { 186245916cd2Sjpk if (!(prev_complaints & XBAD_SHORT)) 186345916cd2Sjpk msglog("routing message too short by %d bytes", 186445916cd2Sjpk (char *)ss - lim); 186545916cd2Sjpk complaints |= XBAD_SHORT; 186645916cd2Sjpk } else if (!(prev_complaints & XBAD_LONG)) { 18677c478bd9Sstevel@tonic-gate msglog("%d bytes of routing message left over", 18687c478bd9Sstevel@tonic-gate lim - (char *)ss); 186945916cd2Sjpk complaints |= XBAD_LONG; 187045916cd2Sjpk } 18717c478bd9Sstevel@tonic-gate retv = -1; 18727c478bd9Sstevel@tonic-gate } 18737c478bd9Sstevel@tonic-gate xaddr_done: 18747c478bd9Sstevel@tonic-gate prev_complaints = complaints; 18757c478bd9Sstevel@tonic-gate return (retv); 18767c478bd9Sstevel@tonic-gate } 18777c478bd9Sstevel@tonic-gate 18787c478bd9Sstevel@tonic-gate /* after aggregating, note routes that belong in the kernel */ 18797c478bd9Sstevel@tonic-gate static void 18807c478bd9Sstevel@tonic-gate kern_out(struct ag_info *ag) 18817c478bd9Sstevel@tonic-gate { 18827c478bd9Sstevel@tonic-gate struct khash *k; 1883e1fa7f4dSsowmini struct interface *ifp; 1884e1fa7f4dSsowmini 1885e1fa7f4dSsowmini ifp = ag->ag_ifp; 1886e1fa7f4dSsowmini 18877c478bd9Sstevel@tonic-gate /* 18887c478bd9Sstevel@tonic-gate * Do not install bad routes if they are not already present. 18897c478bd9Sstevel@tonic-gate * This includes routes that had RS_NET_SYN for interfaces that 18907c478bd9Sstevel@tonic-gate * recently died. 18917c478bd9Sstevel@tonic-gate */ 18927c478bd9Sstevel@tonic-gate if (ag->ag_metric == HOPCNT_INFINITY) { 18937c478bd9Sstevel@tonic-gate k = kern_find(htonl(ag->ag_dst_h), ag->ag_mask, 18947c478bd9Sstevel@tonic-gate ag->ag_nhop, ag->ag_ifp, NULL); 18957c478bd9Sstevel@tonic-gate if (k == NULL) 18967c478bd9Sstevel@tonic-gate return; 18977c478bd9Sstevel@tonic-gate } else { 18987c478bd9Sstevel@tonic-gate k = kern_add(htonl(ag->ag_dst_h), ag->ag_mask, ag->ag_nhop, 1899e1fa7f4dSsowmini ifp); 19007c478bd9Sstevel@tonic-gate } 19017c478bd9Sstevel@tonic-gate 19027c478bd9Sstevel@tonic-gate if (k->k_state & KS_NEW) { 19037c478bd9Sstevel@tonic-gate /* will need to add new entry to the kernel table */ 19047c478bd9Sstevel@tonic-gate k->k_state = KS_ADD; 19057c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_GATEWAY) 19067c478bd9Sstevel@tonic-gate k->k_state |= KS_GATEWAY; 19077c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_IF) 19087c478bd9Sstevel@tonic-gate k->k_state |= KS_IF; 19097c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_PASSIVE) 19107c478bd9Sstevel@tonic-gate k->k_state |= KS_PASSIVE; 19117c478bd9Sstevel@tonic-gate if (ag->ag_state & AGS_FILE) 19127c478bd9Sstevel@tonic-gate k->k_state |= KS_FILE; 19137c478bd9Sstevel@tonic-gate k->k_gate = ag->ag_nhop; 1914e1fa7f4dSsowmini k->k_ifp = ifp; 19157c478bd9Sstevel@tonic-gate k->k_metric = ag->ag_metric; 19167c478bd9Sstevel@tonic-gate return; 19177c478bd9Sstevel@tonic-gate } 19187c478bd9Sstevel@tonic-gate 19197c478bd9Sstevel@tonic-gate if ((k->k_state & (KS_STATIC|KS_DEPRE_IF)) || 19207c478bd9Sstevel@tonic-gate ((k->k_state & (KS_IF|KS_PASSIVE)) == KS_IF)) { 19217c478bd9Sstevel@tonic-gate return; 19227c478bd9Sstevel@tonic-gate } 19237c478bd9Sstevel@tonic-gate 19247c478bd9Sstevel@tonic-gate /* modify existing kernel entry if necessary */ 19257c478bd9Sstevel@tonic-gate if (k->k_gate == ag->ag_nhop && k->k_ifp == ag->ag_ifp && 19267c478bd9Sstevel@tonic-gate k->k_metric != ag->ag_metric) { 19277c478bd9Sstevel@tonic-gate /* 19287c478bd9Sstevel@tonic-gate * Must delete bad interface routes etc. 19297c478bd9Sstevel@tonic-gate * to change them. 19307c478bd9Sstevel@tonic-gate */ 19317c478bd9Sstevel@tonic-gate if (k->k_metric == HOPCNT_INFINITY) 19327c478bd9Sstevel@tonic-gate k->k_state |= KS_DEL_ADD; 19337c478bd9Sstevel@tonic-gate k->k_gate = ag->ag_nhop; 19347c478bd9Sstevel@tonic-gate k->k_metric = ag->ag_metric; 19357c478bd9Sstevel@tonic-gate k->k_state |= KS_CHANGE; 19367c478bd9Sstevel@tonic-gate } 19377c478bd9Sstevel@tonic-gate 19387c478bd9Sstevel@tonic-gate /* 19397c478bd9Sstevel@tonic-gate * If the daemon thinks the route should exist, forget 19407c478bd9Sstevel@tonic-gate * about any redirections. 19417c478bd9Sstevel@tonic-gate * If the daemon thinks the route should exist, eventually 19427c478bd9Sstevel@tonic-gate * override manual intervention by the operator. 19437c478bd9Sstevel@tonic-gate */ 19447c478bd9Sstevel@tonic-gate if ((k->k_state & (KS_DYNAMIC | KS_DELETED)) != 0) { 19457c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DYNAMIC; 19467c478bd9Sstevel@tonic-gate k->k_state |= (KS_ADD | KS_DEL_ADD); 19477c478bd9Sstevel@tonic-gate } 19487c478bd9Sstevel@tonic-gate 19497c478bd9Sstevel@tonic-gate if ((k->k_state & KS_GATEWAY) && !(ag->ag_state & AGS_GATEWAY)) { 19507c478bd9Sstevel@tonic-gate k->k_state &= ~KS_GATEWAY; 19517c478bd9Sstevel@tonic-gate k->k_state |= (KS_ADD | KS_DEL_ADD); 19527c478bd9Sstevel@tonic-gate } else if (!(k->k_state & KS_GATEWAY) && (ag->ag_state & AGS_GATEWAY)) { 19537c478bd9Sstevel@tonic-gate k->k_state |= KS_GATEWAY; 19547c478bd9Sstevel@tonic-gate k->k_state |= (KS_ADD | KS_DEL_ADD); 19557c478bd9Sstevel@tonic-gate } 19567c478bd9Sstevel@tonic-gate 19577c478bd9Sstevel@tonic-gate /* 19587c478bd9Sstevel@tonic-gate * Deleting-and-adding is necessary to change aspects of a route. 19597c478bd9Sstevel@tonic-gate * Just delete instead of deleting and then adding a bad route. 19607c478bd9Sstevel@tonic-gate * Otherwise, we want to keep the route in the kernel. 19617c478bd9Sstevel@tonic-gate */ 19627c478bd9Sstevel@tonic-gate if (k->k_metric == HOPCNT_INFINITY && (k->k_state & KS_DEL_ADD)) 19637c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 19647c478bd9Sstevel@tonic-gate else 19657c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DELETE; 19667c478bd9Sstevel@tonic-gate #undef RT 19677c478bd9Sstevel@tonic-gate } 19687c478bd9Sstevel@tonic-gate 19697c478bd9Sstevel@tonic-gate /* 19707c478bd9Sstevel@tonic-gate * Update our image of the kernel forwarding table using the given 19717c478bd9Sstevel@tonic-gate * route from our internal routing table. 19727c478bd9Sstevel@tonic-gate */ 19737c478bd9Sstevel@tonic-gate 19747c478bd9Sstevel@tonic-gate /*ARGSUSED1*/ 19757c478bd9Sstevel@tonic-gate static int 19767c478bd9Sstevel@tonic-gate walk_kern(struct radix_node *rn, void *argp) 19777c478bd9Sstevel@tonic-gate { 19787c478bd9Sstevel@tonic-gate #define RT ((struct rt_entry *)rn) 19797c478bd9Sstevel@tonic-gate uint8_t metric, pref; 19807c478bd9Sstevel@tonic-gate uint_t ags = 0; 19817c478bd9Sstevel@tonic-gate int i; 19827c478bd9Sstevel@tonic-gate struct rt_spare *rts; 19837c478bd9Sstevel@tonic-gate 19847c478bd9Sstevel@tonic-gate /* Do not install synthetic routes */ 19857c478bd9Sstevel@tonic-gate if (RT->rt_state & RS_NET_SYN) 19867c478bd9Sstevel@tonic-gate return (0); 19877c478bd9Sstevel@tonic-gate 19887c478bd9Sstevel@tonic-gate /* 19897c478bd9Sstevel@tonic-gate * Do not install static routes here. Only 19907c478bd9Sstevel@tonic-gate * read_rt->rtm_add->kern_add should install those 19917c478bd9Sstevel@tonic-gate */ 19927c478bd9Sstevel@tonic-gate if ((RT->rt_state & RS_STATIC) && 19937c478bd9Sstevel@tonic-gate (RT->rt_spares[0].rts_origin != RO_FILE)) 19947c478bd9Sstevel@tonic-gate return (0); 19957c478bd9Sstevel@tonic-gate 19967c478bd9Sstevel@tonic-gate /* Do not clobber kernel if this is a route for a dead interface */ 19977c478bd9Sstevel@tonic-gate if (RT->rt_state & RS_BADIF) 19987c478bd9Sstevel@tonic-gate return (0); 19997c478bd9Sstevel@tonic-gate 20007c478bd9Sstevel@tonic-gate if (!(RT->rt_state & RS_IF)) { 20017c478bd9Sstevel@tonic-gate /* This is an ordinary route, not for an interface. */ 20027c478bd9Sstevel@tonic-gate 20037c478bd9Sstevel@tonic-gate /* 20047c478bd9Sstevel@tonic-gate * aggregate, ordinary good routes without regard to 20057c478bd9Sstevel@tonic-gate * their metric 20067c478bd9Sstevel@tonic-gate */ 20077c478bd9Sstevel@tonic-gate pref = 1; 20087c478bd9Sstevel@tonic-gate ags |= (AGS_GATEWAY | AGS_SUPPRESS | AGS_AGGREGATE); 20097c478bd9Sstevel@tonic-gate 20107c478bd9Sstevel@tonic-gate /* 20117c478bd9Sstevel@tonic-gate * Do not install host routes directly to hosts, to avoid 20127c478bd9Sstevel@tonic-gate * interfering with ARP entries in the kernel table. 20137c478bd9Sstevel@tonic-gate */ 20147c478bd9Sstevel@tonic-gate if (RT_ISHOST(RT) && ntohl(RT->rt_dst) == RT->rt_gate) 20157c478bd9Sstevel@tonic-gate return (0); 20167c478bd9Sstevel@tonic-gate 20177c478bd9Sstevel@tonic-gate } else { 20187c478bd9Sstevel@tonic-gate /* 20197c478bd9Sstevel@tonic-gate * This is an interface route. 20207c478bd9Sstevel@tonic-gate * Do not install routes for "external" remote interfaces. 20217c478bd9Sstevel@tonic-gate */ 20227c478bd9Sstevel@tonic-gate if (RT->rt_ifp != NULL && (RT->rt_ifp->int_state & IS_EXTERNAL)) 20237c478bd9Sstevel@tonic-gate return (0); 20247c478bd9Sstevel@tonic-gate 20257c478bd9Sstevel@tonic-gate /* Interfaces should override received routes. */ 20267c478bd9Sstevel@tonic-gate pref = 0; 20277c478bd9Sstevel@tonic-gate ags |= (AGS_IF | AGS_CORS_GATE); 20287c478bd9Sstevel@tonic-gate if (RT->rt_ifp != NULL && 20297c478bd9Sstevel@tonic-gate !(RT->rt_ifp->int_if_flags & IFF_LOOPBACK) && 20307c478bd9Sstevel@tonic-gate (RT->rt_ifp->int_state & (IS_PASSIVE|IS_ALIAS)) == 20317c478bd9Sstevel@tonic-gate IS_PASSIVE) { 20327c478bd9Sstevel@tonic-gate ags |= AGS_PASSIVE; 20337c478bd9Sstevel@tonic-gate } 20347c478bd9Sstevel@tonic-gate 20357c478bd9Sstevel@tonic-gate /* 20367c478bd9Sstevel@tonic-gate * If it is not an interface, or an alias for an interface, 20377c478bd9Sstevel@tonic-gate * it must be a "gateway." 20387c478bd9Sstevel@tonic-gate * 20397c478bd9Sstevel@tonic-gate * If it is a "remote" interface, it is also a "gateway" to 20407c478bd9Sstevel@tonic-gate * the kernel if is not a alias. 20417c478bd9Sstevel@tonic-gate */ 2042c9116dbcSbw if (RT->rt_ifp == NULL || (RT->rt_ifp->int_state & IS_REMOTE)) { 2043c9116dbcSbw 2044c9116dbcSbw ags |= (AGS_GATEWAY | AGS_SUPPRESS); 2045c9116dbcSbw 2046c9116dbcSbw /* 2047c9116dbcSbw * Do not aggregate IS_PASSIVE routes. 2048c9116dbcSbw */ 2049c9116dbcSbw if (!(RT->rt_ifp->int_state & IS_PASSIVE)) 2050c9116dbcSbw ags |= AGS_AGGREGATE; 2051c9116dbcSbw } 20527c478bd9Sstevel@tonic-gate } 20537c478bd9Sstevel@tonic-gate 20547c478bd9Sstevel@tonic-gate metric = RT->rt_metric; 20557c478bd9Sstevel@tonic-gate if (metric == HOPCNT_INFINITY) { 20567c478bd9Sstevel@tonic-gate /* If the route is dead, try hard to aggregate. */ 20577c478bd9Sstevel@tonic-gate pref = HOPCNT_INFINITY; 20587c478bd9Sstevel@tonic-gate ags |= (AGS_FINE_GATE | AGS_SUPPRESS); 20597c478bd9Sstevel@tonic-gate ags &= ~(AGS_IF | AGS_CORS_GATE); 20607c478bd9Sstevel@tonic-gate } 20617c478bd9Sstevel@tonic-gate 20627c478bd9Sstevel@tonic-gate /* 20637c478bd9Sstevel@tonic-gate * dump all routes that have the same metric as rt_spares[0] 20647c478bd9Sstevel@tonic-gate * into the kern_table, to be added to the kernel. 20657c478bd9Sstevel@tonic-gate */ 20667c478bd9Sstevel@tonic-gate for (i = 0; i < RT->rt_num_spares; i++) { 20677c478bd9Sstevel@tonic-gate rts = &RT->rt_spares[i]; 20687c478bd9Sstevel@tonic-gate 20697c478bd9Sstevel@tonic-gate /* Do not install external routes */ 20707c478bd9Sstevel@tonic-gate if (rts->rts_flags & RTS_EXTERNAL) 20717c478bd9Sstevel@tonic-gate continue; 20727c478bd9Sstevel@tonic-gate 20737c478bd9Sstevel@tonic-gate if (rts->rts_metric == metric) { 20747c478bd9Sstevel@tonic-gate ag_check(RT->rt_dst, RT->rt_mask, 20757c478bd9Sstevel@tonic-gate rts->rts_router, rts->rts_ifp, rts->rts_gate, 20767c478bd9Sstevel@tonic-gate metric, pref, 0, 0, 20777c478bd9Sstevel@tonic-gate (rts->rts_origin & RO_FILE) ? (ags|AGS_FILE) : ags, 20787c478bd9Sstevel@tonic-gate kern_out); 20797c478bd9Sstevel@tonic-gate } 20807c478bd9Sstevel@tonic-gate } 20817c478bd9Sstevel@tonic-gate return (0); 20827c478bd9Sstevel@tonic-gate #undef RT 20837c478bd9Sstevel@tonic-gate } 20847c478bd9Sstevel@tonic-gate 20857c478bd9Sstevel@tonic-gate 20867c478bd9Sstevel@tonic-gate /* Update the kernel table to match the daemon table. */ 20877c478bd9Sstevel@tonic-gate static void 20887c478bd9Sstevel@tonic-gate fix_kern(void) 20897c478bd9Sstevel@tonic-gate { 20907c478bd9Sstevel@tonic-gate int i; 20917c478bd9Sstevel@tonic-gate struct khash *k, *pk, *knext; 20927c478bd9Sstevel@tonic-gate 20937c478bd9Sstevel@tonic-gate 20947c478bd9Sstevel@tonic-gate need_kern = age_timer; 20957c478bd9Sstevel@tonic-gate 20967c478bd9Sstevel@tonic-gate /* Walk daemon table, updating the copy of the kernel table. */ 20977c478bd9Sstevel@tonic-gate (void) rn_walktree(rhead, walk_kern, NULL); 20987c478bd9Sstevel@tonic-gate ag_flush(0, 0, kern_out); 20997c478bd9Sstevel@tonic-gate 21007c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 21017c478bd9Sstevel@tonic-gate pk = NULL; 21027c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = knext) { 21037c478bd9Sstevel@tonic-gate knext = k->k_next; 21047c478bd9Sstevel@tonic-gate 21057c478bd9Sstevel@tonic-gate /* Do not touch local interface routes */ 21067c478bd9Sstevel@tonic-gate if ((k->k_state & KS_DEPRE_IF) || 21077c478bd9Sstevel@tonic-gate (k->k_state & (KS_IF|KS_PASSIVE)) == KS_IF) { 21087c478bd9Sstevel@tonic-gate pk = k; 21097c478bd9Sstevel@tonic-gate continue; 21107c478bd9Sstevel@tonic-gate } 21117c478bd9Sstevel@tonic-gate 21127c478bd9Sstevel@tonic-gate /* Do not touch static routes */ 21137c478bd9Sstevel@tonic-gate if (k->k_state & KS_STATIC) { 21147c478bd9Sstevel@tonic-gate kern_check_static(k, 0); 21157c478bd9Sstevel@tonic-gate pk = k; 21167c478bd9Sstevel@tonic-gate continue; 21177c478bd9Sstevel@tonic-gate } 21187c478bd9Sstevel@tonic-gate 21197c478bd9Sstevel@tonic-gate /* check hold on routes deleted by the operator */ 21207c478bd9Sstevel@tonic-gate if (k->k_keep > now.tv_sec) { 21217c478bd9Sstevel@tonic-gate /* ensure we check when the hold is over */ 21227c478bd9Sstevel@tonic-gate LIM_SEC(need_kern, k->k_keep); 21237c478bd9Sstevel@tonic-gate pk = k; 21247c478bd9Sstevel@tonic-gate continue; 21257c478bd9Sstevel@tonic-gate } 21267c478bd9Sstevel@tonic-gate 21277c478bd9Sstevel@tonic-gate if ((k->k_state & KS_DELETE) && 21287c478bd9Sstevel@tonic-gate !(k->k_state & KS_DYNAMIC)) { 21297c478bd9Sstevel@tonic-gate if ((k->k_dst == RIP_DEFAULT) && 21307c478bd9Sstevel@tonic-gate (k->k_ifp != NULL) && 21317c478bd9Sstevel@tonic-gate (kern_alternate(RIP_DEFAULT, 21327c478bd9Sstevel@tonic-gate k->k_mask, k->k_gate, k->k_ifp, 21337c478bd9Sstevel@tonic-gate NULL) == NULL)) 21347c478bd9Sstevel@tonic-gate rdisc_restore(k->k_ifp); 21357c478bd9Sstevel@tonic-gate kern_ioctl(k, RTM_DELETE, 0); 21367c478bd9Sstevel@tonic-gate if (pk != NULL) 21377c478bd9Sstevel@tonic-gate pk->k_next = knext; 21387c478bd9Sstevel@tonic-gate else 21397c478bd9Sstevel@tonic-gate khash_bins[i] = knext; 21407c478bd9Sstevel@tonic-gate free(k); 21417c478bd9Sstevel@tonic-gate continue; 21427c478bd9Sstevel@tonic-gate } 21437c478bd9Sstevel@tonic-gate 21447c478bd9Sstevel@tonic-gate if (k->k_state & KS_DEL_ADD) 21457c478bd9Sstevel@tonic-gate kern_ioctl(k, RTM_DELETE, 0); 21467c478bd9Sstevel@tonic-gate 21477c478bd9Sstevel@tonic-gate if (k->k_state & KS_ADD) { 21487c478bd9Sstevel@tonic-gate if ((k->k_dst == RIP_DEFAULT) && 21497c478bd9Sstevel@tonic-gate (k->k_ifp != NULL)) 21507c478bd9Sstevel@tonic-gate rdisc_suppress(k->k_ifp); 21517c478bd9Sstevel@tonic-gate kern_ioctl(k, RTM_ADD, 21527c478bd9Sstevel@tonic-gate ((0 != (k->k_state & (KS_GATEWAY | 2153f9aa3e1eSkcpoon KS_DYNAMIC))) ? RTF_GATEWAY : 0)); 21547c478bd9Sstevel@tonic-gate } else if (k->k_state & KS_CHANGE) { 2155*d52135a8SSowmini Varadhan kern_ioctl(k, RTM_CHANGE, 21567c478bd9Sstevel@tonic-gate ((0 != (k->k_state & (KS_GATEWAY | 2157f9aa3e1eSkcpoon KS_DYNAMIC))) ? RTF_GATEWAY : 0)); 21587c478bd9Sstevel@tonic-gate } 21597c478bd9Sstevel@tonic-gate k->k_state &= ~(KS_ADD|KS_CHANGE|KS_DEL_ADD); 21607c478bd9Sstevel@tonic-gate 21617c478bd9Sstevel@tonic-gate /* 21627c478bd9Sstevel@tonic-gate * Mark this route to be deleted in the next cycle. 21637c478bd9Sstevel@tonic-gate * This deletes routes that disappear from the 21647c478bd9Sstevel@tonic-gate * daemon table, since the normal aging code 21657c478bd9Sstevel@tonic-gate * will clear the bit for routes that have not 21667c478bd9Sstevel@tonic-gate * disappeared from the daemon table. 21677c478bd9Sstevel@tonic-gate */ 21687c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 21697c478bd9Sstevel@tonic-gate pk = k; 21707c478bd9Sstevel@tonic-gate } 21717c478bd9Sstevel@tonic-gate } 21727c478bd9Sstevel@tonic-gate } 21737c478bd9Sstevel@tonic-gate 21747c478bd9Sstevel@tonic-gate 21757c478bd9Sstevel@tonic-gate /* Delete a static route in the image of the kernel table. */ 21767c478bd9Sstevel@tonic-gate void 21777c478bd9Sstevel@tonic-gate del_static(in_addr_t dst, in_addr_t mask, in_addr_t gate, 21787c478bd9Sstevel@tonic-gate struct interface *ifp, int gone) 21797c478bd9Sstevel@tonic-gate { 21807c478bd9Sstevel@tonic-gate struct khash *k; 21817c478bd9Sstevel@tonic-gate struct rt_entry *rt; 21827c478bd9Sstevel@tonic-gate 21837c478bd9Sstevel@tonic-gate /* 21847c478bd9Sstevel@tonic-gate * Just mark it in the table to be deleted next time the kernel 21857c478bd9Sstevel@tonic-gate * table is updated. 21867c478bd9Sstevel@tonic-gate * If it has already been deleted, mark it as such, and set its 21877c478bd9Sstevel@tonic-gate * keep-timer so that it will not be deleted again for a while. 21887c478bd9Sstevel@tonic-gate * This lets the operator delete a route added by the daemon 21897c478bd9Sstevel@tonic-gate * and add a replacement. 21907c478bd9Sstevel@tonic-gate */ 21917c478bd9Sstevel@tonic-gate k = kern_find(dst, mask, gate, ifp, NULL); 21927c478bd9Sstevel@tonic-gate if (k != NULL && (gate == 0 || k->k_gate == gate)) { 21937c478bd9Sstevel@tonic-gate k->k_state &= ~(KS_STATIC | KS_DYNAMIC | KS_CHECK); 21947c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 21957c478bd9Sstevel@tonic-gate if (gone) { 21967c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETED; 21977c478bd9Sstevel@tonic-gate k->k_keep = now.tv_sec + K_KEEP_LIM; 21987c478bd9Sstevel@tonic-gate } 21997c478bd9Sstevel@tonic-gate } 22007c478bd9Sstevel@tonic-gate 22017c478bd9Sstevel@tonic-gate rt = rtget(dst, mask); 22027c478bd9Sstevel@tonic-gate if (rt != NULL && (rt->rt_state & RS_STATIC)) 22037c478bd9Sstevel@tonic-gate rtbad(rt, NULL); 22047c478bd9Sstevel@tonic-gate } 22057c478bd9Sstevel@tonic-gate 22067c478bd9Sstevel@tonic-gate 22077c478bd9Sstevel@tonic-gate /* 22087c478bd9Sstevel@tonic-gate * Delete all routes generated from ICMP Redirects that use a given gateway, 22097c478bd9Sstevel@tonic-gate * as well as old redirected routes. 22107c478bd9Sstevel@tonic-gate */ 22117c478bd9Sstevel@tonic-gate void 22127c478bd9Sstevel@tonic-gate del_redirects(in_addr_t bad_gate, time_t old) 22137c478bd9Sstevel@tonic-gate { 22147c478bd9Sstevel@tonic-gate int i; 22157c478bd9Sstevel@tonic-gate struct khash *k; 22167c478bd9Sstevel@tonic-gate boolean_t dosupply = should_supply(NULL); 22177c478bd9Sstevel@tonic-gate 22187c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 22197c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = k->k_next) { 22207c478bd9Sstevel@tonic-gate if (!(k->k_state & KS_DYNAMIC) || 22217c478bd9Sstevel@tonic-gate (k->k_state & (KS_STATIC|KS_IF|KS_DEPRE_IF))) 22227c478bd9Sstevel@tonic-gate continue; 22237c478bd9Sstevel@tonic-gate 22247c478bd9Sstevel@tonic-gate if (k->k_gate != bad_gate && k->k_redirect_time > old && 22257c478bd9Sstevel@tonic-gate !dosupply) 22267c478bd9Sstevel@tonic-gate continue; 22277c478bd9Sstevel@tonic-gate 22287c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 22297c478bd9Sstevel@tonic-gate k->k_state &= ~KS_DYNAMIC; 22307c478bd9Sstevel@tonic-gate need_kern.tv_sec = now.tv_sec; 22317c478bd9Sstevel@tonic-gate trace_act("mark redirected %s --> %s for deletion", 22327c478bd9Sstevel@tonic-gate addrname(k->k_dst, k->k_mask, 0), 22337c478bd9Sstevel@tonic-gate naddr_ntoa(k->k_gate)); 22347c478bd9Sstevel@tonic-gate } 22357c478bd9Sstevel@tonic-gate } 22367c478bd9Sstevel@tonic-gate } 22377c478bd9Sstevel@tonic-gate 22387c478bd9Sstevel@tonic-gate /* Start the daemon tables. */ 22397c478bd9Sstevel@tonic-gate void 22407c478bd9Sstevel@tonic-gate rtinit(void) 22417c478bd9Sstevel@tonic-gate { 22427c478bd9Sstevel@tonic-gate int i; 22437c478bd9Sstevel@tonic-gate struct ag_info *ag; 22447c478bd9Sstevel@tonic-gate 22457c478bd9Sstevel@tonic-gate /* Initialize the radix trees */ 22467c478bd9Sstevel@tonic-gate rn_init(); 22477c478bd9Sstevel@tonic-gate (void) rn_inithead((void**)&rhead, 32); 22487c478bd9Sstevel@tonic-gate 22497c478bd9Sstevel@tonic-gate /* mark all of the slots in the table free */ 22507c478bd9Sstevel@tonic-gate ag_avail = ag_slots; 22517c478bd9Sstevel@tonic-gate for (ag = ag_slots, i = 1; i < NUM_AG_SLOTS; i++) { 22527c478bd9Sstevel@tonic-gate ag->ag_fine = ag+1; 22537c478bd9Sstevel@tonic-gate ag++; 22547c478bd9Sstevel@tonic-gate } 22557c478bd9Sstevel@tonic-gate } 22567c478bd9Sstevel@tonic-gate 22577c478bd9Sstevel@tonic-gate 22587c478bd9Sstevel@tonic-gate static struct sockaddr_in dst_sock = {AF_INET}; 22597c478bd9Sstevel@tonic-gate static struct sockaddr_in mask_sock = {AF_INET}; 22607c478bd9Sstevel@tonic-gate 22617c478bd9Sstevel@tonic-gate 22627c478bd9Sstevel@tonic-gate static void 22637c478bd9Sstevel@tonic-gate set_need_flash(void) 22647c478bd9Sstevel@tonic-gate { 22657c478bd9Sstevel@tonic-gate if (!need_flash) { 22667c478bd9Sstevel@tonic-gate need_flash = _B_TRUE; 22677c478bd9Sstevel@tonic-gate /* 22687c478bd9Sstevel@tonic-gate * Do not send the flash update immediately. Wait a little 22697c478bd9Sstevel@tonic-gate * while to hear from other routers. 22707c478bd9Sstevel@tonic-gate */ 22717c478bd9Sstevel@tonic-gate no_flash.tv_sec = now.tv_sec + MIN_WAITTIME; 22727c478bd9Sstevel@tonic-gate } 22737c478bd9Sstevel@tonic-gate } 22747c478bd9Sstevel@tonic-gate 22757c478bd9Sstevel@tonic-gate 22767c478bd9Sstevel@tonic-gate /* Get a particular routing table entry */ 22777c478bd9Sstevel@tonic-gate struct rt_entry * 22787c478bd9Sstevel@tonic-gate rtget(in_addr_t dst, in_addr_t mask) 22797c478bd9Sstevel@tonic-gate { 22807c478bd9Sstevel@tonic-gate struct rt_entry *rt; 22817c478bd9Sstevel@tonic-gate 22827c478bd9Sstevel@tonic-gate dst_sock.sin_addr.s_addr = dst; 22837c478bd9Sstevel@tonic-gate mask_sock.sin_addr.s_addr = htonl(mask); 22847c478bd9Sstevel@tonic-gate rt = (struct rt_entry *)rhead->rnh_lookup(&dst_sock, &mask_sock, rhead); 22857c478bd9Sstevel@tonic-gate if (rt == NULL || rt->rt_dst != dst || rt->rt_mask != mask) 22867c478bd9Sstevel@tonic-gate return (NULL); 22877c478bd9Sstevel@tonic-gate 22887c478bd9Sstevel@tonic-gate return (rt); 22897c478bd9Sstevel@tonic-gate } 22907c478bd9Sstevel@tonic-gate 22917c478bd9Sstevel@tonic-gate 22927c478bd9Sstevel@tonic-gate /* Find a route to dst as the kernel would. */ 22937c478bd9Sstevel@tonic-gate struct rt_entry * 22947c478bd9Sstevel@tonic-gate rtfind(in_addr_t dst) 22957c478bd9Sstevel@tonic-gate { 22967c478bd9Sstevel@tonic-gate dst_sock.sin_addr.s_addr = dst; 22977c478bd9Sstevel@tonic-gate return ((struct rt_entry *)rhead->rnh_matchaddr(&dst_sock, rhead)); 22987c478bd9Sstevel@tonic-gate } 22997c478bd9Sstevel@tonic-gate 23007c478bd9Sstevel@tonic-gate /* add a route to the table */ 23017c478bd9Sstevel@tonic-gate void 23027c478bd9Sstevel@tonic-gate rtadd(in_addr_t dst, 23037c478bd9Sstevel@tonic-gate in_addr_t mask, 23047c478bd9Sstevel@tonic-gate uint16_t state, /* rt_state for the entry */ 23057c478bd9Sstevel@tonic-gate struct rt_spare *new) 23067c478bd9Sstevel@tonic-gate { 23077c478bd9Sstevel@tonic-gate struct rt_entry *rt; 23087c478bd9Sstevel@tonic-gate in_addr_t smask; 23097c478bd9Sstevel@tonic-gate int i; 23107c478bd9Sstevel@tonic-gate struct rt_spare *rts; 23117c478bd9Sstevel@tonic-gate 23127c478bd9Sstevel@tonic-gate /* This is the only function that increments total_routes. */ 23137c478bd9Sstevel@tonic-gate if (total_routes == MAX_ROUTES) { 23147c478bd9Sstevel@tonic-gate msglog("have maximum (%d) routes", total_routes); 23157c478bd9Sstevel@tonic-gate return; 23167c478bd9Sstevel@tonic-gate } 23177c478bd9Sstevel@tonic-gate 23187c478bd9Sstevel@tonic-gate rt = rtmalloc(sizeof (*rt), "rtadd"); 23197c478bd9Sstevel@tonic-gate (void) memset(rt, 0, sizeof (*rt)); 23207c478bd9Sstevel@tonic-gate rt->rt_spares = rtmalloc(SPARE_INC * sizeof (struct rt_spare), 23217c478bd9Sstevel@tonic-gate "rtadd"); 23227c478bd9Sstevel@tonic-gate rt->rt_num_spares = SPARE_INC; 23237c478bd9Sstevel@tonic-gate (void) memset(rt->rt_spares, 0, SPARE_INC * sizeof (struct rt_spare)); 23247c478bd9Sstevel@tonic-gate for (rts = rt->rt_spares, i = rt->rt_num_spares; i != 0; i--, rts++) 23257c478bd9Sstevel@tonic-gate rts->rts_metric = HOPCNT_INFINITY; 23267c478bd9Sstevel@tonic-gate 23277c478bd9Sstevel@tonic-gate rt->rt_nodes->rn_key = (uint8_t *)&rt->rt_dst_sock; 23287c478bd9Sstevel@tonic-gate rt->rt_dst = dst; 23297c478bd9Sstevel@tonic-gate rt->rt_dst_sock.sin_family = AF_INET; 23307c478bd9Sstevel@tonic-gate if (mask != HOST_MASK) { 23317c478bd9Sstevel@tonic-gate smask = std_mask(dst); 23327c478bd9Sstevel@tonic-gate if ((smask & ~mask) == 0 && mask > smask) 23337c478bd9Sstevel@tonic-gate state |= RS_SUBNET; 23347c478bd9Sstevel@tonic-gate } 23357c478bd9Sstevel@tonic-gate mask_sock.sin_addr.s_addr = htonl(mask); 23367c478bd9Sstevel@tonic-gate rt->rt_mask = mask; 23377c478bd9Sstevel@tonic-gate rt->rt_spares[0] = *new; 23387c478bd9Sstevel@tonic-gate rt->rt_state = state; 23397c478bd9Sstevel@tonic-gate rt->rt_time = now.tv_sec; 23407c478bd9Sstevel@tonic-gate rt->rt_poison_metric = HOPCNT_INFINITY; 23417c478bd9Sstevel@tonic-gate rt->rt_seqno = update_seqno; 23427c478bd9Sstevel@tonic-gate 23437c478bd9Sstevel@tonic-gate if (TRACEACTIONS) 23447c478bd9Sstevel@tonic-gate trace_add_del("Add", rt); 23457c478bd9Sstevel@tonic-gate 23467c478bd9Sstevel@tonic-gate need_kern.tv_sec = now.tv_sec; 23477c478bd9Sstevel@tonic-gate set_need_flash(); 23487c478bd9Sstevel@tonic-gate 23497c478bd9Sstevel@tonic-gate if (NULL == rhead->rnh_addaddr(&rt->rt_dst_sock, &mask_sock, rhead, 23507c478bd9Sstevel@tonic-gate rt->rt_nodes)) { 23517c478bd9Sstevel@tonic-gate msglog("rnh_addaddr() failed for %s mask=%s", 23527c478bd9Sstevel@tonic-gate naddr_ntoa(dst), naddr_ntoa(htonl(mask))); 23537c478bd9Sstevel@tonic-gate free(rt); 23547c478bd9Sstevel@tonic-gate } 23557c478bd9Sstevel@tonic-gate 23567c478bd9Sstevel@tonic-gate total_routes++; 23577c478bd9Sstevel@tonic-gate } 23587c478bd9Sstevel@tonic-gate 23597c478bd9Sstevel@tonic-gate 23607c478bd9Sstevel@tonic-gate /* notice a changed route */ 23617c478bd9Sstevel@tonic-gate void 23627c478bd9Sstevel@tonic-gate rtchange(struct rt_entry *rt, 23637c478bd9Sstevel@tonic-gate uint16_t state, /* new state bits */ 23647c478bd9Sstevel@tonic-gate struct rt_spare *new, 23657c478bd9Sstevel@tonic-gate char *label) 23667c478bd9Sstevel@tonic-gate { 23677c478bd9Sstevel@tonic-gate if (rt->rt_metric != new->rts_metric) { 23687c478bd9Sstevel@tonic-gate /* 23697c478bd9Sstevel@tonic-gate * Fix the kernel immediately if it seems the route 23707c478bd9Sstevel@tonic-gate * has gone bad, since there may be a working route that 23717c478bd9Sstevel@tonic-gate * aggregates this route. 23727c478bd9Sstevel@tonic-gate */ 23737c478bd9Sstevel@tonic-gate if (new->rts_metric == HOPCNT_INFINITY) { 23747c478bd9Sstevel@tonic-gate need_kern.tv_sec = now.tv_sec; 23757c478bd9Sstevel@tonic-gate if (new->rts_time >= now.tv_sec - EXPIRE_TIME) 23767c478bd9Sstevel@tonic-gate new->rts_time = now.tv_sec - EXPIRE_TIME; 23777c478bd9Sstevel@tonic-gate } 23787c478bd9Sstevel@tonic-gate rt->rt_seqno = update_seqno; 23797c478bd9Sstevel@tonic-gate set_need_flash(); 23807c478bd9Sstevel@tonic-gate } 23817c478bd9Sstevel@tonic-gate 23827c478bd9Sstevel@tonic-gate if (rt->rt_gate != new->rts_gate) { 23837c478bd9Sstevel@tonic-gate need_kern.tv_sec = now.tv_sec; 23847c478bd9Sstevel@tonic-gate rt->rt_seqno = update_seqno; 23857c478bd9Sstevel@tonic-gate set_need_flash(); 23867c478bd9Sstevel@tonic-gate } 23877c478bd9Sstevel@tonic-gate 23887c478bd9Sstevel@tonic-gate state |= (rt->rt_state & RS_SUBNET); 23897c478bd9Sstevel@tonic-gate 23907c478bd9Sstevel@tonic-gate /* Keep various things from deciding ageless routes are stale. */ 23917c478bd9Sstevel@tonic-gate if (!AGE_RT(state, rt->rt_spares[0].rts_origin, new->rts_ifp)) 23927c478bd9Sstevel@tonic-gate new->rts_time = now.tv_sec; 23937c478bd9Sstevel@tonic-gate 23947c478bd9Sstevel@tonic-gate if (TRACEACTIONS) 23957c478bd9Sstevel@tonic-gate trace_change(rt, state, new, 23967c478bd9Sstevel@tonic-gate label ? label : "Chg "); 23977c478bd9Sstevel@tonic-gate 23987c478bd9Sstevel@tonic-gate rt->rt_state = state; 23997c478bd9Sstevel@tonic-gate /* 24007c478bd9Sstevel@tonic-gate * If the interface state of the new primary route is good, 24017c478bd9Sstevel@tonic-gate * turn off RS_BADIF flag 24027c478bd9Sstevel@tonic-gate */ 24037c478bd9Sstevel@tonic-gate if ((rt->rt_state & RS_BADIF) && 24047c478bd9Sstevel@tonic-gate IS_IFF_UP(new->rts_ifp->int_if_flags) && 24057c478bd9Sstevel@tonic-gate !(new->rts_ifp->int_state & (IS_BROKE | IS_SICK))) 24067c478bd9Sstevel@tonic-gate rt->rt_state &= ~(RS_BADIF); 24077c478bd9Sstevel@tonic-gate 24087c478bd9Sstevel@tonic-gate rt->rt_spares[0] = *new; 24097c478bd9Sstevel@tonic-gate } 24107c478bd9Sstevel@tonic-gate 24117c478bd9Sstevel@tonic-gate 24127c478bd9Sstevel@tonic-gate /* check for a better route among the spares */ 24137c478bd9Sstevel@tonic-gate static struct rt_spare * 24147c478bd9Sstevel@tonic-gate rts_better(struct rt_entry *rt) 24157c478bd9Sstevel@tonic-gate { 24167c478bd9Sstevel@tonic-gate struct rt_spare *rts, *rts1; 24177c478bd9Sstevel@tonic-gate int i; 24187c478bd9Sstevel@tonic-gate 24197c478bd9Sstevel@tonic-gate /* find the best alternative among the spares */ 24207c478bd9Sstevel@tonic-gate rts = rt->rt_spares+1; 24217c478bd9Sstevel@tonic-gate for (i = rt->rt_num_spares, rts1 = rts+1; i > 2; i--, rts1++) { 24227c478bd9Sstevel@tonic-gate if (BETTER_LINK(rt, rts1, rts)) 24237c478bd9Sstevel@tonic-gate rts = rts1; 24247c478bd9Sstevel@tonic-gate } 24257c478bd9Sstevel@tonic-gate 24267c478bd9Sstevel@tonic-gate return (rts); 24277c478bd9Sstevel@tonic-gate } 24287c478bd9Sstevel@tonic-gate 24297c478bd9Sstevel@tonic-gate 24307c478bd9Sstevel@tonic-gate /* switch to a backup route */ 24317c478bd9Sstevel@tonic-gate void 24327c478bd9Sstevel@tonic-gate rtswitch(struct rt_entry *rt, 24337c478bd9Sstevel@tonic-gate struct rt_spare *rts) 24347c478bd9Sstevel@tonic-gate { 24357c478bd9Sstevel@tonic-gate struct rt_spare swap; 24367c478bd9Sstevel@tonic-gate char label[10]; 24377c478bd9Sstevel@tonic-gate 24387c478bd9Sstevel@tonic-gate /* Do not change permanent routes */ 24397c478bd9Sstevel@tonic-gate if (0 != (rt->rt_state & (RS_MHOME | RS_STATIC | 24407c478bd9Sstevel@tonic-gate RS_NET_SYN | RS_IF))) 24417c478bd9Sstevel@tonic-gate return; 24427c478bd9Sstevel@tonic-gate 24437c478bd9Sstevel@tonic-gate /* find the best alternative among the spares */ 24447c478bd9Sstevel@tonic-gate if (rts == NULL) 24457c478bd9Sstevel@tonic-gate rts = rts_better(rt); 24467c478bd9Sstevel@tonic-gate 24477c478bd9Sstevel@tonic-gate /* Do not bother if it is not worthwhile. */ 24487c478bd9Sstevel@tonic-gate if (!BETTER_LINK(rt, rts, rt->rt_spares)) 24497c478bd9Sstevel@tonic-gate return; 24507c478bd9Sstevel@tonic-gate 24517c478bd9Sstevel@tonic-gate swap = rt->rt_spares[0]; 24527c478bd9Sstevel@tonic-gate (void) snprintf(label, sizeof (label), "Use #%d", 24537c478bd9Sstevel@tonic-gate (int)(rts - rt->rt_spares)); 24547c478bd9Sstevel@tonic-gate rtchange(rt, rt->rt_state & ~(RS_NET_SYN), rts, label); 24557c478bd9Sstevel@tonic-gate 24567c478bd9Sstevel@tonic-gate if (swap.rts_metric == HOPCNT_INFINITY) { 24577c478bd9Sstevel@tonic-gate *rts = rts_empty; 24587c478bd9Sstevel@tonic-gate } else { 24597c478bd9Sstevel@tonic-gate *rts = swap; 24607c478bd9Sstevel@tonic-gate } 24617c478bd9Sstevel@tonic-gate 24627c478bd9Sstevel@tonic-gate } 24637c478bd9Sstevel@tonic-gate 24647c478bd9Sstevel@tonic-gate 24657c478bd9Sstevel@tonic-gate void 24667c478bd9Sstevel@tonic-gate rtdelete(struct rt_entry *rt) 24677c478bd9Sstevel@tonic-gate { 24687c478bd9Sstevel@tonic-gate struct rt_entry *deleted_rt; 24697c478bd9Sstevel@tonic-gate struct rt_spare *rts; 24707c478bd9Sstevel@tonic-gate int i; 24717c478bd9Sstevel@tonic-gate in_addr_t gate = rt->rt_gate; /* for debugging */ 24727c478bd9Sstevel@tonic-gate 24737c478bd9Sstevel@tonic-gate if (TRACEACTIONS) 24747c478bd9Sstevel@tonic-gate trace_add_del("Del", rt); 24757c478bd9Sstevel@tonic-gate 24767c478bd9Sstevel@tonic-gate for (i = 0; i < rt->rt_num_spares; i++) { 24777c478bd9Sstevel@tonic-gate rts = &rt->rt_spares[i]; 24787c478bd9Sstevel@tonic-gate rts_delete(rt, rts); 24797c478bd9Sstevel@tonic-gate } 24807c478bd9Sstevel@tonic-gate 24817c478bd9Sstevel@tonic-gate dst_sock.sin_addr.s_addr = rt->rt_dst; 24827c478bd9Sstevel@tonic-gate mask_sock.sin_addr.s_addr = htonl(rt->rt_mask); 24837c478bd9Sstevel@tonic-gate if (rt != (deleted_rt = 24847c478bd9Sstevel@tonic-gate ((struct rt_entry *)rhead->rnh_deladdr(&dst_sock, &mask_sock, 24857c478bd9Sstevel@tonic-gate rhead)))) { 24867c478bd9Sstevel@tonic-gate msglog("rnh_deladdr(%s) failed; found rt 0x%lx", 24877c478bd9Sstevel@tonic-gate rtname(rt->rt_dst, rt->rt_mask, gate), deleted_rt); 24887c478bd9Sstevel@tonic-gate if (deleted_rt != NULL) 24897c478bd9Sstevel@tonic-gate free(deleted_rt); 24907c478bd9Sstevel@tonic-gate } 24917c478bd9Sstevel@tonic-gate total_routes--; 2492d6b3210dSsowmini free(rt->rt_spares); 24937c478bd9Sstevel@tonic-gate free(rt); 24947c478bd9Sstevel@tonic-gate 24957c478bd9Sstevel@tonic-gate if (dst_sock.sin_addr.s_addr == RIP_DEFAULT) { 24967c478bd9Sstevel@tonic-gate /* 24977c478bd9Sstevel@tonic-gate * we just deleted the default route. Trigger rdisc_sort 24987c478bd9Sstevel@tonic-gate * so that we can recover from any rdisc information that 24997c478bd9Sstevel@tonic-gate * is valid 25007c478bd9Sstevel@tonic-gate */ 25017c478bd9Sstevel@tonic-gate rdisc_timer.tv_sec = 0; 25027c478bd9Sstevel@tonic-gate } 25037c478bd9Sstevel@tonic-gate } 25047c478bd9Sstevel@tonic-gate 25057c478bd9Sstevel@tonic-gate void 25067c478bd9Sstevel@tonic-gate rts_delete(struct rt_entry *rt, struct rt_spare *rts) 25077c478bd9Sstevel@tonic-gate { 25087c478bd9Sstevel@tonic-gate struct khash *k; 25097c478bd9Sstevel@tonic-gate 25107c478bd9Sstevel@tonic-gate trace_upslot(rt, rts, &rts_empty); 25117c478bd9Sstevel@tonic-gate k = kern_find(rt->rt_dst, rt->rt_mask, 25127c478bd9Sstevel@tonic-gate rts->rts_gate, rts->rts_ifp, NULL); 25137c478bd9Sstevel@tonic-gate if (k != NULL && 25147c478bd9Sstevel@tonic-gate !(k->k_state & KS_DEPRE_IF) && 25157c478bd9Sstevel@tonic-gate ((k->k_state & (KS_IF|KS_PASSIVE)) != KS_IF)) { 25167c478bd9Sstevel@tonic-gate k->k_state |= KS_DELETE; 25177c478bd9Sstevel@tonic-gate need_kern.tv_sec = now.tv_sec; 25187c478bd9Sstevel@tonic-gate } 25197c478bd9Sstevel@tonic-gate 25207c478bd9Sstevel@tonic-gate *rts = rts_empty; 25217c478bd9Sstevel@tonic-gate } 25227c478bd9Sstevel@tonic-gate 25237c478bd9Sstevel@tonic-gate /* 25247c478bd9Sstevel@tonic-gate * Get rid of a bad route, and try to switch to a replacement. 25257c478bd9Sstevel@tonic-gate * If the route has gone bad because of a bad interface, 25267c478bd9Sstevel@tonic-gate * the information about the dead interface is available in badifp 25277c478bd9Sstevel@tonic-gate * for the purpose of sanity checks, if_flags checks etc. 25287c478bd9Sstevel@tonic-gate */ 25297c478bd9Sstevel@tonic-gate static void 25307c478bd9Sstevel@tonic-gate rtbad(struct rt_entry *rt, struct interface *badifp) 25317c478bd9Sstevel@tonic-gate { 25327c478bd9Sstevel@tonic-gate struct rt_spare new; 25337c478bd9Sstevel@tonic-gate uint16_t rt_state; 25347c478bd9Sstevel@tonic-gate 25357c478bd9Sstevel@tonic-gate 25367c478bd9Sstevel@tonic-gate if (badifp == NULL || (rt->rt_spares[0].rts_ifp == badifp)) { 25377c478bd9Sstevel@tonic-gate /* Poison the route */ 25387c478bd9Sstevel@tonic-gate new = rt->rt_spares[0]; 25397c478bd9Sstevel@tonic-gate new.rts_metric = HOPCNT_INFINITY; 25407c478bd9Sstevel@tonic-gate rt_state = rt->rt_state & ~(RS_IF | RS_LOCAL | RS_STATIC); 25417c478bd9Sstevel@tonic-gate } 25427c478bd9Sstevel@tonic-gate 25437c478bd9Sstevel@tonic-gate if (badifp != NULL) { 25447c478bd9Sstevel@tonic-gate /* 25457c478bd9Sstevel@tonic-gate * Dont mark the rtentry bad unless the ifp for the primary 25467c478bd9Sstevel@tonic-gate * route is the bad ifp 25477c478bd9Sstevel@tonic-gate */ 25487c478bd9Sstevel@tonic-gate if (rt->rt_spares[0].rts_ifp != badifp) 25497c478bd9Sstevel@tonic-gate return; 25507c478bd9Sstevel@tonic-gate /* 25517c478bd9Sstevel@tonic-gate * badifp has just gone bad. We want to keep this 25527c478bd9Sstevel@tonic-gate * rt_entry around so that we tell our rip-neighbors 25537c478bd9Sstevel@tonic-gate * about the bad route, but we can't do anything 25547c478bd9Sstevel@tonic-gate * to the kernel itself, so mark it as RS_BADIF 25557c478bd9Sstevel@tonic-gate */ 25567c478bd9Sstevel@tonic-gate trace_misc("rtbad:Setting RS_BADIF (%s)", badifp->int_name); 25577c478bd9Sstevel@tonic-gate rt_state |= RS_BADIF; 25587c478bd9Sstevel@tonic-gate new.rts_ifp = &dummy_ifp; 25597c478bd9Sstevel@tonic-gate } 25607c478bd9Sstevel@tonic-gate rtchange(rt, rt_state, &new, 0); 25617c478bd9Sstevel@tonic-gate rtswitch(rt, 0); 25627c478bd9Sstevel@tonic-gate } 25637c478bd9Sstevel@tonic-gate 25647c478bd9Sstevel@tonic-gate 25657c478bd9Sstevel@tonic-gate /* 25667c478bd9Sstevel@tonic-gate * Junk a RS_NET_SYN or RS_LOCAL route, 25677c478bd9Sstevel@tonic-gate * unless it is needed by another interface. 25687c478bd9Sstevel@tonic-gate */ 25697c478bd9Sstevel@tonic-gate void 25707c478bd9Sstevel@tonic-gate rtbad_sub(struct rt_entry *rt, struct interface *badifp) 25717c478bd9Sstevel@tonic-gate { 25727c478bd9Sstevel@tonic-gate struct interface *ifp, *ifp1; 25737c478bd9Sstevel@tonic-gate struct intnet *intnetp; 25747c478bd9Sstevel@tonic-gate uint_t state; 25757c478bd9Sstevel@tonic-gate 25767c478bd9Sstevel@tonic-gate 25777c478bd9Sstevel@tonic-gate ifp1 = NULL; 25787c478bd9Sstevel@tonic-gate state = 0; 25797c478bd9Sstevel@tonic-gate 25807c478bd9Sstevel@tonic-gate if (rt->rt_state & RS_LOCAL) { 25817c478bd9Sstevel@tonic-gate /* 25827c478bd9Sstevel@tonic-gate * Is this the route through loopback for the interface? 25837c478bd9Sstevel@tonic-gate * If so, see if it is used by any other interfaces, such 25847c478bd9Sstevel@tonic-gate * as a point-to-point interface with the same local address. 25857c478bd9Sstevel@tonic-gate */ 25867c478bd9Sstevel@tonic-gate for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) { 25877c478bd9Sstevel@tonic-gate /* Retain it if another interface needs it. */ 25887c478bd9Sstevel@tonic-gate if (ifp->int_addr == rt->rt_ifp->int_addr) { 25897c478bd9Sstevel@tonic-gate state |= RS_LOCAL; 25907c478bd9Sstevel@tonic-gate ifp1 = ifp; 25917c478bd9Sstevel@tonic-gate break; 25927c478bd9Sstevel@tonic-gate } 25937c478bd9Sstevel@tonic-gate } 25947c478bd9Sstevel@tonic-gate 25957c478bd9Sstevel@tonic-gate } 25967c478bd9Sstevel@tonic-gate 25977c478bd9Sstevel@tonic-gate if (!(state & RS_LOCAL)) { 25987c478bd9Sstevel@tonic-gate /* 25997c478bd9Sstevel@tonic-gate * Retain RIPv1 logical network route if there is another 26007c478bd9Sstevel@tonic-gate * interface that justifies it. 26017c478bd9Sstevel@tonic-gate */ 26027c478bd9Sstevel@tonic-gate if (rt->rt_state & RS_NET_SYN) { 26037c478bd9Sstevel@tonic-gate for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) { 26047c478bd9Sstevel@tonic-gate if ((ifp->int_state & IS_NEED_NET_SYN) && 26057c478bd9Sstevel@tonic-gate rt->rt_mask == ifp->int_std_mask && 26067c478bd9Sstevel@tonic-gate rt->rt_dst == ifp->int_std_addr) { 26077c478bd9Sstevel@tonic-gate state |= RS_NET_SYN; 26087c478bd9Sstevel@tonic-gate ifp1 = ifp; 26097c478bd9Sstevel@tonic-gate break; 26107c478bd9Sstevel@tonic-gate } 26117c478bd9Sstevel@tonic-gate } 26127c478bd9Sstevel@tonic-gate } 26137c478bd9Sstevel@tonic-gate 26147c478bd9Sstevel@tonic-gate /* or if there is an authority route that needs it. */ 26157c478bd9Sstevel@tonic-gate for (intnetp = intnets; intnetp != NULL; 26167c478bd9Sstevel@tonic-gate intnetp = intnetp->intnet_next) { 26177c478bd9Sstevel@tonic-gate if (intnetp->intnet_addr == rt->rt_dst && 26187c478bd9Sstevel@tonic-gate intnetp->intnet_mask == rt->rt_mask) { 26197c478bd9Sstevel@tonic-gate state |= (RS_NET_SYN | RS_NET_INT); 26207c478bd9Sstevel@tonic-gate break; 26217c478bd9Sstevel@tonic-gate } 26227c478bd9Sstevel@tonic-gate } 26237c478bd9Sstevel@tonic-gate } 26247c478bd9Sstevel@tonic-gate 26257c478bd9Sstevel@tonic-gate if (ifp1 != NULL || (state & RS_NET_SYN)) { 26267c478bd9Sstevel@tonic-gate struct rt_spare new = rt->rt_spares[0]; 26277c478bd9Sstevel@tonic-gate new.rts_ifp = ifp1; 26287c478bd9Sstevel@tonic-gate rtchange(rt, ((rt->rt_state & ~(RS_NET_SYN|RS_LOCAL)) | state), 26297c478bd9Sstevel@tonic-gate &new, 0); 26307c478bd9Sstevel@tonic-gate } else { 26317c478bd9Sstevel@tonic-gate rtbad(rt, badifp); 26327c478bd9Sstevel@tonic-gate } 26337c478bd9Sstevel@tonic-gate } 26347c478bd9Sstevel@tonic-gate 26357c478bd9Sstevel@tonic-gate /* 26367c478bd9Sstevel@tonic-gate * Called while walking the table looking for sick interfaces 26377c478bd9Sstevel@tonic-gate * or after a time change. 26387c478bd9Sstevel@tonic-gate */ 26397c478bd9Sstevel@tonic-gate int 26407c478bd9Sstevel@tonic-gate walk_bad(struct radix_node *rn, 26417c478bd9Sstevel@tonic-gate void *argp) 26427c478bd9Sstevel@tonic-gate { 26437c478bd9Sstevel@tonic-gate #define RT ((struct rt_entry *)rn) 26447c478bd9Sstevel@tonic-gate struct rt_spare *rts; 26457c478bd9Sstevel@tonic-gate int i, j = -1; 26467c478bd9Sstevel@tonic-gate 26477c478bd9Sstevel@tonic-gate /* fix any spare routes through the interface */ 26487c478bd9Sstevel@tonic-gate for (i = 1; i < RT->rt_num_spares; i++) { 26497c478bd9Sstevel@tonic-gate rts = &((struct rt_entry *)rn)->rt_spares[i]; 26507c478bd9Sstevel@tonic-gate 26517c478bd9Sstevel@tonic-gate if (rts->rts_metric < HOPCNT_INFINITY && 26527c478bd9Sstevel@tonic-gate (rts->rts_ifp == NULL || 26537c478bd9Sstevel@tonic-gate (rts->rts_ifp->int_state & IS_BROKE))) 26547c478bd9Sstevel@tonic-gate rts_delete(RT, rts); 26557c478bd9Sstevel@tonic-gate else { 26567c478bd9Sstevel@tonic-gate if (rts->rts_origin != RO_NONE) 26577c478bd9Sstevel@tonic-gate j = i; 26587c478bd9Sstevel@tonic-gate } 26597c478bd9Sstevel@tonic-gate } 26607c478bd9Sstevel@tonic-gate 26617c478bd9Sstevel@tonic-gate /* 26627c478bd9Sstevel@tonic-gate * Deal with the main route 26637c478bd9Sstevel@tonic-gate * finished if it has been handled before or if its interface is ok 26647c478bd9Sstevel@tonic-gate */ 26657c478bd9Sstevel@tonic-gate if (RT->rt_ifp == NULL || !(RT->rt_ifp->int_state & IS_BROKE)) 26667c478bd9Sstevel@tonic-gate return (0); 26677c478bd9Sstevel@tonic-gate 26687c478bd9Sstevel@tonic-gate /* Bad routes for other than interfaces are easy. */ 26697c478bd9Sstevel@tonic-gate if (!(RT->rt_state & (RS_IF | RS_NET_SYN | RS_LOCAL))) { 267009f979dcSsowmini if (j > 0) { 267109f979dcSsowmini RT->rt_spares[0].rts_metric = HOPCNT_INFINITY; 26727c478bd9Sstevel@tonic-gate rtswitch(RT, NULL); 267309f979dcSsowmini } else { 26747c478bd9Sstevel@tonic-gate rtbad(RT, (struct interface *)argp); 267509f979dcSsowmini } 26767c478bd9Sstevel@tonic-gate return (0); 26777c478bd9Sstevel@tonic-gate } 26787c478bd9Sstevel@tonic-gate 26797c478bd9Sstevel@tonic-gate rtbad_sub(RT, (struct interface *)argp); 26807c478bd9Sstevel@tonic-gate return (0); 26817c478bd9Sstevel@tonic-gate #undef RT 26827c478bd9Sstevel@tonic-gate } 26837c478bd9Sstevel@tonic-gate 26847c478bd9Sstevel@tonic-gate /* 26857c478bd9Sstevel@tonic-gate * Called while walking the table to replace a duplicate interface 26867c478bd9Sstevel@tonic-gate * with a backup. 26877c478bd9Sstevel@tonic-gate */ 26887c478bd9Sstevel@tonic-gate int 26897c478bd9Sstevel@tonic-gate walk_rewire(struct radix_node *rn, void *argp) 26907c478bd9Sstevel@tonic-gate { 26917c478bd9Sstevel@tonic-gate struct rt_entry *RT = (struct rt_entry *)rn; 26927c478bd9Sstevel@tonic-gate struct rewire_data *wire = (struct rewire_data *)argp; 26937c478bd9Sstevel@tonic-gate struct rt_spare *rts; 26947c478bd9Sstevel@tonic-gate int i; 26957c478bd9Sstevel@tonic-gate 26967c478bd9Sstevel@tonic-gate /* fix any spare routes through the interface */ 26977c478bd9Sstevel@tonic-gate rts = RT->rt_spares; 26987c478bd9Sstevel@tonic-gate for (i = RT->rt_num_spares; i > 0; i--, rts++) { 26997c478bd9Sstevel@tonic-gate if (rts->rts_ifp == wire->if_old) { 27007c478bd9Sstevel@tonic-gate rts->rts_ifp = wire->if_new; 27017c478bd9Sstevel@tonic-gate if ((RT->rt_dst == RIP_DEFAULT) && 27027c478bd9Sstevel@tonic-gate (wire->if_old->int_state & IS_SUPPRESS_RDISC)) 27037c478bd9Sstevel@tonic-gate rdisc_suppress(rts->rts_ifp); 27047c478bd9Sstevel@tonic-gate if ((rts->rts_metric += wire->metric_delta) > 27057c478bd9Sstevel@tonic-gate HOPCNT_INFINITY) 27067c478bd9Sstevel@tonic-gate rts->rts_metric = HOPCNT_INFINITY; 27077c478bd9Sstevel@tonic-gate 27087c478bd9Sstevel@tonic-gate /* 27097c478bd9Sstevel@tonic-gate * If the main route is getting a worse metric, 27107c478bd9Sstevel@tonic-gate * then it may be time to switch to a backup. 27117c478bd9Sstevel@tonic-gate */ 27127c478bd9Sstevel@tonic-gate if (i == RT->rt_num_spares && wire->metric_delta > 0) { 27137c478bd9Sstevel@tonic-gate rtswitch(RT, NULL); 27147c478bd9Sstevel@tonic-gate } 27157c478bd9Sstevel@tonic-gate } 27167c478bd9Sstevel@tonic-gate } 27177c478bd9Sstevel@tonic-gate 27187c478bd9Sstevel@tonic-gate return (0); 27197c478bd9Sstevel@tonic-gate } 27207c478bd9Sstevel@tonic-gate 27217c478bd9Sstevel@tonic-gate /* Check the age of an individual route. */ 27227c478bd9Sstevel@tonic-gate static int 27237c478bd9Sstevel@tonic-gate walk_age(struct radix_node *rn, void *argp) 27247c478bd9Sstevel@tonic-gate { 27257c478bd9Sstevel@tonic-gate #define RT ((struct rt_entry *)rn) 27267c478bd9Sstevel@tonic-gate struct interface *ifp; 27277c478bd9Sstevel@tonic-gate struct rt_spare *rts; 27287c478bd9Sstevel@tonic-gate int i; 27297c478bd9Sstevel@tonic-gate in_addr_t age_bad_gate = *(in_addr_t *)argp; 27307c478bd9Sstevel@tonic-gate 27317c478bd9Sstevel@tonic-gate 27327c478bd9Sstevel@tonic-gate /* 27337c478bd9Sstevel@tonic-gate * age all of the spare routes, including the primary route 27347c478bd9Sstevel@tonic-gate * currently in use 27357c478bd9Sstevel@tonic-gate */ 27367c478bd9Sstevel@tonic-gate rts = RT->rt_spares; 27377c478bd9Sstevel@tonic-gate for (i = RT->rt_num_spares; i != 0; i--, rts++) { 27387c478bd9Sstevel@tonic-gate 27397c478bd9Sstevel@tonic-gate ifp = rts->rts_ifp; 27407c478bd9Sstevel@tonic-gate if (i == RT->rt_num_spares) { 27417c478bd9Sstevel@tonic-gate if (!AGE_RT(RT->rt_state, rts->rts_origin, ifp)) { 27427c478bd9Sstevel@tonic-gate /* 27437c478bd9Sstevel@tonic-gate * Keep various things from deciding ageless 27447c478bd9Sstevel@tonic-gate * routes are stale 27457c478bd9Sstevel@tonic-gate */ 27467c478bd9Sstevel@tonic-gate rts->rts_time = now.tv_sec; 27477c478bd9Sstevel@tonic-gate continue; 27487c478bd9Sstevel@tonic-gate } 27497c478bd9Sstevel@tonic-gate 27507c478bd9Sstevel@tonic-gate /* forget RIP routes after RIP has been turned off. */ 27517c478bd9Sstevel@tonic-gate if (rip_sock < 0) { 27527c478bd9Sstevel@tonic-gate rts->rts_time = now_stale + 1; 27537c478bd9Sstevel@tonic-gate } 27547c478bd9Sstevel@tonic-gate } 27557c478bd9Sstevel@tonic-gate 27567c478bd9Sstevel@tonic-gate /* age failing routes */ 27577c478bd9Sstevel@tonic-gate if (age_bad_gate == rts->rts_gate && 27587c478bd9Sstevel@tonic-gate rts->rts_time >= now_stale) { 27597c478bd9Sstevel@tonic-gate rts->rts_time -= SUPPLY_INTERVAL; 27607c478bd9Sstevel@tonic-gate } 27617c478bd9Sstevel@tonic-gate 27627c478bd9Sstevel@tonic-gate /* trash the spare routes when they go bad */ 27637c478bd9Sstevel@tonic-gate if (rts->rts_origin == RO_RIP && 27647c478bd9Sstevel@tonic-gate ((rip_sock < 0) || 27657c478bd9Sstevel@tonic-gate (rts->rts_metric < HOPCNT_INFINITY && 27667c478bd9Sstevel@tonic-gate now_garbage > rts->rts_time)) && 27677c478bd9Sstevel@tonic-gate i != RT->rt_num_spares) { 27687c478bd9Sstevel@tonic-gate rts_delete(RT, rts); 27697c478bd9Sstevel@tonic-gate } 27707c478bd9Sstevel@tonic-gate } 27717c478bd9Sstevel@tonic-gate 27727c478bd9Sstevel@tonic-gate 27737c478bd9Sstevel@tonic-gate /* finished if the active route is still fresh */ 27747c478bd9Sstevel@tonic-gate if (now_stale <= RT->rt_time) 27757c478bd9Sstevel@tonic-gate return (0); 27767c478bd9Sstevel@tonic-gate 27777c478bd9Sstevel@tonic-gate /* try to switch to an alternative */ 27787c478bd9Sstevel@tonic-gate rtswitch(RT, NULL); 27797c478bd9Sstevel@tonic-gate 27807c478bd9Sstevel@tonic-gate /* Delete a dead route after it has been publically mourned. */ 27817c478bd9Sstevel@tonic-gate if (now_garbage > RT->rt_time) { 27827c478bd9Sstevel@tonic-gate rtdelete(RT); 27837c478bd9Sstevel@tonic-gate return (0); 27847c478bd9Sstevel@tonic-gate } 27857c478bd9Sstevel@tonic-gate 27867c478bd9Sstevel@tonic-gate /* Start poisoning a bad route before deleting it. */ 27877c478bd9Sstevel@tonic-gate if (now.tv_sec - RT->rt_time > EXPIRE_TIME) { 27887c478bd9Sstevel@tonic-gate struct rt_spare new = RT->rt_spares[0]; 27897c478bd9Sstevel@tonic-gate 27907c478bd9Sstevel@tonic-gate new.rts_metric = HOPCNT_INFINITY; 27917c478bd9Sstevel@tonic-gate rtchange(RT, RT->rt_state, &new, 0); 27927c478bd9Sstevel@tonic-gate } 27937c478bd9Sstevel@tonic-gate return (0); 27947c478bd9Sstevel@tonic-gate } 27957c478bd9Sstevel@tonic-gate 27967c478bd9Sstevel@tonic-gate 27977c478bd9Sstevel@tonic-gate /* Watch for dead routes and interfaces. */ 27987c478bd9Sstevel@tonic-gate void 27997c478bd9Sstevel@tonic-gate age(in_addr_t bad_gate) 28007c478bd9Sstevel@tonic-gate { 28017c478bd9Sstevel@tonic-gate struct interface *ifp; 28027c478bd9Sstevel@tonic-gate int need_query = 0; 28037c478bd9Sstevel@tonic-gate 28047c478bd9Sstevel@tonic-gate /* 28057c478bd9Sstevel@tonic-gate * If not listening to RIP, there is no need to age the routes in 28067c478bd9Sstevel@tonic-gate * the table. 28077c478bd9Sstevel@tonic-gate */ 28087c478bd9Sstevel@tonic-gate age_timer.tv_sec = (now.tv_sec 28097c478bd9Sstevel@tonic-gate + ((rip_sock < 0) ? NEVER : SUPPLY_INTERVAL)); 28107c478bd9Sstevel@tonic-gate 28117c478bd9Sstevel@tonic-gate /* 28127c478bd9Sstevel@tonic-gate * Check for dead IS_REMOTE interfaces by timing their 28137c478bd9Sstevel@tonic-gate * transmissions. 28147c478bd9Sstevel@tonic-gate */ 28157c478bd9Sstevel@tonic-gate for (ifp = ifnet; ifp; ifp = ifp->int_next) { 28167c478bd9Sstevel@tonic-gate if (!(ifp->int_state & IS_REMOTE)) 28177c478bd9Sstevel@tonic-gate continue; 28187c478bd9Sstevel@tonic-gate 28197c478bd9Sstevel@tonic-gate /* ignore unreachable remote interfaces */ 28207c478bd9Sstevel@tonic-gate if (!check_remote(ifp)) 28217c478bd9Sstevel@tonic-gate continue; 28227c478bd9Sstevel@tonic-gate 28237c478bd9Sstevel@tonic-gate /* Restore remote interface that has become reachable */ 28247c478bd9Sstevel@tonic-gate if (ifp->int_state & IS_BROKE) 28257c478bd9Sstevel@tonic-gate if_ok(ifp, "remote ", _B_FALSE); 28267c478bd9Sstevel@tonic-gate 28277c478bd9Sstevel@tonic-gate if (ifp->int_act_time != NEVER && 28287c478bd9Sstevel@tonic-gate now.tv_sec - ifp->int_act_time > EXPIRE_TIME) { 28297c478bd9Sstevel@tonic-gate writelog(LOG_NOTICE, 28307c478bd9Sstevel@tonic-gate "remote interface %s to %s timed out after" 28317c478bd9Sstevel@tonic-gate " %ld:%ld", 28327c478bd9Sstevel@tonic-gate ifp->int_name, 28337c478bd9Sstevel@tonic-gate naddr_ntoa(ifp->int_dstaddr), 28347c478bd9Sstevel@tonic-gate (now.tv_sec - ifp->int_act_time)/60, 28357c478bd9Sstevel@tonic-gate (now.tv_sec - ifp->int_act_time)%60); 28367c478bd9Sstevel@tonic-gate if_sick(ifp, _B_FALSE); 28377c478bd9Sstevel@tonic-gate } 28387c478bd9Sstevel@tonic-gate 28397c478bd9Sstevel@tonic-gate /* 28407c478bd9Sstevel@tonic-gate * If we have not heard from the other router 28417c478bd9Sstevel@tonic-gate * recently, ask it. 28427c478bd9Sstevel@tonic-gate */ 28437c478bd9Sstevel@tonic-gate if (now.tv_sec >= ifp->int_query_time) { 28447c478bd9Sstevel@tonic-gate ifp->int_query_time = NEVER; 28457c478bd9Sstevel@tonic-gate need_query = 1; 28467c478bd9Sstevel@tonic-gate } 28477c478bd9Sstevel@tonic-gate } 28487c478bd9Sstevel@tonic-gate 28497c478bd9Sstevel@tonic-gate /* Age routes. */ 28507c478bd9Sstevel@tonic-gate (void) rn_walktree(rhead, walk_age, &bad_gate); 28517c478bd9Sstevel@tonic-gate 28527c478bd9Sstevel@tonic-gate /* 28537c478bd9Sstevel@tonic-gate * delete old redirected routes to keep the kernel table small 28547c478bd9Sstevel@tonic-gate * and prevent blackholes 28557c478bd9Sstevel@tonic-gate */ 28567c478bd9Sstevel@tonic-gate del_redirects(bad_gate, now.tv_sec-STALE_TIME); 28577c478bd9Sstevel@tonic-gate 28587c478bd9Sstevel@tonic-gate /* Update the kernel routing table. */ 28597c478bd9Sstevel@tonic-gate fix_kern(); 28607c478bd9Sstevel@tonic-gate 28617c478bd9Sstevel@tonic-gate /* poke reticent remote gateways */ 28627c478bd9Sstevel@tonic-gate if (need_query) 28637c478bd9Sstevel@tonic-gate rip_query(); 28647c478bd9Sstevel@tonic-gate } 28657c478bd9Sstevel@tonic-gate 28667c478bd9Sstevel@tonic-gate void 28677c478bd9Sstevel@tonic-gate kern_dump(void) 28687c478bd9Sstevel@tonic-gate { 28697c478bd9Sstevel@tonic-gate int i; 28707c478bd9Sstevel@tonic-gate struct khash *k; 28717c478bd9Sstevel@tonic-gate 28727c478bd9Sstevel@tonic-gate for (i = 0; i < KHASH_SIZE; i++) { 28737c478bd9Sstevel@tonic-gate for (k = khash_bins[i]; k != NULL; k = k->k_next) 28747c478bd9Sstevel@tonic-gate trace_khash(k); 28757c478bd9Sstevel@tonic-gate } 28767c478bd9Sstevel@tonic-gate } 28777c478bd9Sstevel@tonic-gate 28787c478bd9Sstevel@tonic-gate 28797c478bd9Sstevel@tonic-gate static struct interface * 28807c478bd9Sstevel@tonic-gate gwkludge_iflookup(in_addr_t dstaddr, in_addr_t addr, in_addr_t mask) 28817c478bd9Sstevel@tonic-gate { 28827c478bd9Sstevel@tonic-gate uint32_t int_state; 28837c478bd9Sstevel@tonic-gate struct interface *ifp; 28847c478bd9Sstevel@tonic-gate 28857c478bd9Sstevel@tonic-gate for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) { 28867c478bd9Sstevel@tonic-gate int_state = ifp->int_state; 28877c478bd9Sstevel@tonic-gate 28887c478bd9Sstevel@tonic-gate if (!(int_state & IS_REMOTE)) 28897c478bd9Sstevel@tonic-gate continue; 28907c478bd9Sstevel@tonic-gate 28917c478bd9Sstevel@tonic-gate if (ifp->int_dstaddr == dstaddr && ifp->int_addr == addr && 28927c478bd9Sstevel@tonic-gate ifp->int_mask == mask) 28937c478bd9Sstevel@tonic-gate return (ifp); 28947c478bd9Sstevel@tonic-gate } 28957c478bd9Sstevel@tonic-gate return (NULL); 28967c478bd9Sstevel@tonic-gate } 2897982ec2c2SRishi Srivatsavai 2898982ec2c2SRishi Srivatsavai /* 2899982ec2c2SRishi Srivatsavai * Lookup logical interface structure given the gateway address. 2900982ec2c2SRishi Srivatsavai * Returns null if no interfaces match the given name. 2901982ec2c2SRishi Srivatsavai */ 2902982ec2c2SRishi Srivatsavai static struct interface * 2903982ec2c2SRishi Srivatsavai lifp_iflookup(in_addr_t addr, const char *name) 2904982ec2c2SRishi Srivatsavai { 2905982ec2c2SRishi Srivatsavai struct physical_interface *phyi; 2906982ec2c2SRishi Srivatsavai struct interface *ifp; 2907982ec2c2SRishi Srivatsavai struct interface *best = NULL; 2908982ec2c2SRishi Srivatsavai 2909982ec2c2SRishi Srivatsavai if ((phyi = phys_byname(name)) == NULL) 2910982ec2c2SRishi Srivatsavai return (NULL); 2911982ec2c2SRishi Srivatsavai 2912982ec2c2SRishi Srivatsavai for (ifp = phyi->phyi_interface; ifp != NULL; 2913982ec2c2SRishi Srivatsavai ifp = ifp->int_ilist.hl_next) { 2914982ec2c2SRishi Srivatsavai 2915982ec2c2SRishi Srivatsavai #ifdef DEBUG_KERNEL_ROUTE_READ 2916982ec2c2SRishi Srivatsavai (void) fprintf(stderr, " checking interface" 2917982ec2c2SRishi Srivatsavai " %-4s %-4s %-15s-->%-15s \n", 2918982ec2c2SRishi Srivatsavai phyi->phyi_name, ifp->int_name, 2919982ec2c2SRishi Srivatsavai naddr_ntoa(ifp->int_addr), 2920982ec2c2SRishi Srivatsavai addrname(((ifp->int_if_flags & IFF_POINTOPOINT) ? 2921982ec2c2SRishi Srivatsavai ifp->int_dstaddr : htonl(ifp->int_net)), 2922982ec2c2SRishi Srivatsavai ifp->int_mask, 1)); 2923982ec2c2SRishi Srivatsavai #endif 2924982ec2c2SRishi Srivatsavai /* Exact match found */ 2925982ec2c2SRishi Srivatsavai if (addr_on_ifp(addr, ifp, &best)) 2926982ec2c2SRishi Srivatsavai return (ifp); 2927982ec2c2SRishi Srivatsavai } 2928982ec2c2SRishi Srivatsavai /* No exact match found but return any best match found */ 2929982ec2c2SRishi Srivatsavai return (best); 2930982ec2c2SRishi Srivatsavai } 2931