| route.c (287476) | route.c (287798) |
|---|---|
| 1/*- 2 * Copyright (c) 1980, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95 | 1/*- 2 * Copyright (c) 1980, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95 |
| 30 * $FreeBSD: head/sys/net/route.c 287476 2015-09-05 05:33:20Z melifaro $ | 30 * $FreeBSD: head/sys/net/route.c 287798 2015-09-14 19:17:25Z vangyzen $ |
| 31 */ 32/************************************************************************ 33 * Note: In this file a 'fib' is a "forwarding information base" * 34 * Which is the new name for an in kernel routing (next hop) table. * 35 ***********************************************************************/ 36 37#include "opt_inet.h" 38#include "opt_inet6.h" --- 540 unchanged lines hidden (view full) --- 579 } 580 rt = rtalloc1_fib(dst, 0, 0UL, fibnum); /* NB: rt is locked */ 581 /* 582 * If the redirect isn't from our current router for this dst, 583 * it's either old or wrong. If it redirects us to ourselves, 584 * we have a routing loop, perhaps as a result of an interface 585 * going down recently. 586 */ | 31 */ 32/************************************************************************ 33 * Note: In this file a 'fib' is a "forwarding information base" * 34 * Which is the new name for an in kernel routing (next hop) table. * 35 ***********************************************************************/ 36 37#include "opt_inet.h" 38#include "opt_inet6.h" --- 540 unchanged lines hidden (view full) --- 579 } 580 rt = rtalloc1_fib(dst, 0, 0UL, fibnum); /* NB: rt is locked */ 581 /* 582 * If the redirect isn't from our current router for this dst, 583 * it's either old or wrong. If it redirects us to ourselves, 584 * we have a routing loop, perhaps as a result of an interface 585 * going down recently. 586 */ |
| 587 if (!(flags & RTF_DONE) && rt && 588 (!sa_equal(src, rt->rt_gateway) || rt->rt_ifa != ifa)) 589 error = EINVAL; 590 else if (ifa_ifwithaddr_check(gateway)) | 587 if (!(flags & RTF_DONE) && rt) { 588 if (!sa_equal(src, rt->rt_gateway)) { 589 error = EINVAL; 590 goto done; 591 } 592 if (rt->rt_ifa != ifa && ifa->ifa_addr->sa_family != AF_LINK) { 593 error = EINVAL; 594 goto done; 595 } 596 } 597 if ((flags & RTF_GATEWAY) && ifa_ifwithaddr_check(gateway)) { |
| 591 error = EHOSTUNREACH; | 598 error = EHOSTUNREACH; |
| 592 if (error) | |
| 593 goto done; | 599 goto done; |
| 600 } |
|
| 594 /* 595 * Create a new entry if we just got back a wildcard entry 596 * or the lookup failed. This is necessary for hosts 597 * which use routing redirects generated by smart gateways 598 * to dynamically build the routing tables. 599 */ 600 if (rt == NULL || (rt_mask(rt) && rt_mask(rt)->sa_len < 2)) 601 goto create; --- 6 unchanged lines hidden (view full) --- 608 /* 609 * Changing from route to net => route to host. 610 * Create new route, rather than smashing route to net. 611 */ 612 create: 613 rt0 = rt; 614 rt = NULL; 615 | 601 /* 602 * Create a new entry if we just got back a wildcard entry 603 * or the lookup failed. This is necessary for hosts 604 * which use routing redirects generated by smart gateways 605 * to dynamically build the routing tables. 606 */ 607 if (rt == NULL || (rt_mask(rt) && rt_mask(rt)->sa_len < 2)) 608 goto create; --- 6 unchanged lines hidden (view full) --- 615 /* 616 * Changing from route to net => route to host. 617 * Create new route, rather than smashing route to net. 618 */ 619 create: 620 rt0 = rt; 621 rt = NULL; 622 |
| 616 flags |= RTF_GATEWAY | RTF_DYNAMIC; | 623 flags |= RTF_DYNAMIC; |
| 617 bzero((caddr_t)&info, sizeof(info)); 618 info.rti_info[RTAX_DST] = dst; 619 info.rti_info[RTAX_GATEWAY] = gateway; 620 info.rti_info[RTAX_NETMASK] = netmask; 621 info.rti_ifa = ifa; 622 info.rti_flags = flags; 623 if (rt0 != NULL) 624 RT_UNLOCK(rt0); /* drop lock to avoid LOR with RNH */ --- 10 unchanged lines hidden (view full) --- 635 stat = &V_rtstat.rts_dynamic; 636 } else { 637 struct rtentry *gwrt; 638 639 /* 640 * Smash the current notion of the gateway to 641 * this destination. Should check about netmask!!! 642 */ | 624 bzero((caddr_t)&info, sizeof(info)); 625 info.rti_info[RTAX_DST] = dst; 626 info.rti_info[RTAX_GATEWAY] = gateway; 627 info.rti_info[RTAX_NETMASK] = netmask; 628 info.rti_ifa = ifa; 629 info.rti_flags = flags; 630 if (rt0 != NULL) 631 RT_UNLOCK(rt0); /* drop lock to avoid LOR with RNH */ --- 10 unchanged lines hidden (view full) --- 642 stat = &V_rtstat.rts_dynamic; 643 } else { 644 struct rtentry *gwrt; 645 646 /* 647 * Smash the current notion of the gateway to 648 * this destination. Should check about netmask!!! 649 */ |
| 650 if ((flags & RTF_GATEWAY) == 0) 651 rt->rt_flags &= ~RTF_GATEWAY; |
|
| 643 rt->rt_flags |= RTF_MODIFIED; 644 flags |= RTF_MODIFIED; 645 stat = &V_rtstat.rts_newgateway; 646 /* 647 * add the key and gateway (in one malloc'd chunk). 648 */ 649 RT_UNLOCK(rt); 650 RADIX_NODE_HEAD_LOCK(rnh); 651 RT_LOCK(rt); 652 rt_setgate(rt, rt_key(rt), gateway); 653 gwrt = rtalloc1(gateway, 1, RTF_RNH_LOCKED); 654 RADIX_NODE_HEAD_UNLOCK(rnh); 655 EVENTHANDLER_INVOKE(route_redirect_event, rt, gwrt, dst); | 652 rt->rt_flags |= RTF_MODIFIED; 653 flags |= RTF_MODIFIED; 654 stat = &V_rtstat.rts_newgateway; 655 /* 656 * add the key and gateway (in one malloc'd chunk). 657 */ 658 RT_UNLOCK(rt); 659 RADIX_NODE_HEAD_LOCK(rnh); 660 RT_LOCK(rt); 661 rt_setgate(rt, rt_key(rt), gateway); 662 gwrt = rtalloc1(gateway, 1, RTF_RNH_LOCKED); 663 RADIX_NODE_HEAD_UNLOCK(rnh); 664 EVENTHANDLER_INVOKE(route_redirect_event, rt, gwrt, dst); |
| 656 RTFREE_LOCKED(gwrt); | 665 if (gwrt) 666 RTFREE_LOCKED(gwrt); |
| 657 } 658 } else 659 error = EHOSTUNREACH; 660done: 661 if (rt) 662 RTFREE_LOCKED(rt); 663out: 664 if (error) --- 1458 unchanged lines hidden --- | 667 } 668 } else 669 error = EHOSTUNREACH; 670done: 671 if (rt) 672 RTFREE_LOCKED(rt); 673out: 674 if (error) --- 1458 unchanged lines hidden --- |