diff options
Diffstat (limited to 'sys/netinet6/ipv6_rtrequest.c')
| -rw-r--r-- | sys/netinet6/ipv6_rtrequest.c | 1017 |
1 files changed, 0 insertions, 1017 deletions
diff --git a/sys/netinet6/ipv6_rtrequest.c b/sys/netinet6/ipv6_rtrequest.c deleted file mode 100644 index 08c1744df98..00000000000 --- a/sys/netinet6/ipv6_rtrequest.c +++ /dev/null @@ -1,1017 +0,0 @@ -/* -%%% copyright-nrl-95 -This software is Copyright 1995-1998 by Randall Atkinson, Ronald Lee, -Daniel McDonald, Bao Phan, and Chris Winters. All Rights Reserved. All -rights under this copyright have been assigned to the US Naval Research -Laboratory (NRL). The NRL Copyright Notice and License Agreement Version -1.1 (January 17, 1995) applies to this software. -You should have received a copy of the license with this software. If you -didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>. - -*/ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/time.h> -#include <sys/kernel.h> -#include <sys/errno.h> -/*#include <sys/ioctl.h>*/ -#include <sys/syslog.h> - -#include <net/if.h> -#include <net/if_types.h> -#include <net/if_dl.h> -#include <net/route.h> - -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> - -#include <netinet6/in6.h> -#include <netinet6/in6_var.h> -#include <netinet6/ipv6.h> -#include <netinet6/ipv6_var.h> -#include <netinet6/ipv6_icmp.h> - -#ifdef DEBUG_NRL -#include <sys/debug.h> -#else /* DEBUG_NRL */ -#if __OpenBSD__ -#include <netinet6/debug.h> -#else /* __OpenBSD__ */ -#include <sys/debug.h> -#endif /* __OpenBSD__ */ -#endif /* DEBUG_NRL */ - -/* - * Globals (and forward function declarations). - */ - -/* - * External globals. - */ -extern struct sockaddr_in6 in6_allones; -extern struct discq dqhead; -extern struct v6router defrtr; -extern struct v6router nondefrtr; - -extern struct in6_ifaddr *in6_ifaddr; - -extern int ipv6forwarding; - -/* - * External function prototypes. - */ - -/* - * General notes: - * - * These functions are mainly called from ipv6_discovery.c but are - * fairly generic and generally useful and so live in their own file. - * danmcd rja - */ -void tunnel_parent __P((struct rtentry *)); -struct v6router *ipv6_add_defrouter_rtrequest(struct rtentry *); -void tunnel_child __P((struct rtentry *)); -void ipv6_nsolicit __P((struct ifnet *, struct mbuf *, struct rtentry *)); -void tunnel_parent_clean __P((struct rtentry *)); -int ipv6_delete_defrouter __P((struct v6router *)); -void tunnel_child_clean __P((struct rtentry *)); - -static int add_defchild __P((struct rtentry *)); -static void add_netchild __P((struct rtentry *)); -void ipv6_setrtifa __P((struct rtentry *)); -static void add_non_default __P((struct rtentry *)); - -/* - * Functions and macros. - */ - - -/*---------------------------------------------------------------------- - * add_defchild(): - * Find the best default router out of our list and use it - * for this destination route. - ----------------------------------------------------------------------*/ -static int -add_defchild(rt) - struct rtentry *rt; -{ - struct v6router *v6r = defrtr.v6r_next; - struct sockaddr_in6 *dst; - - /* - * What if this child turns out to be a tunneling route? OUCH! - * - * One other thing: If rt_key(rt) is link-local, but it hit from - * the default router, then perhaps it should - * go with the ipv6_onlink_query() route. - */ - - dst = (struct sockaddr_in6 *)rt_key(rt); - - if (!IN6_IS_ADDR_LINKLOCAL(&dst->sin6_addr)) { - /* - * Since there are no priorities, just pick one. For now, I guess I'll - * Just pick v6r_next. - */ - if (v6r != &defrtr) - { - struct v6child *v6c; - int rc = 0; - - DPRINTF(IDL_EVENT,("About to do rt_setgate. rt before is:\n")); - DDO(IDL_EVENT,dump_rtentry(rt)); - DPRINTF(IDL_EVENT,("Args are (dst, parent->rt_gateway, v6r_rt):\n")); - DDO(IDL_EVENT,dump_smart_sockaddr((struct sockaddr *)dst);\ - dump_smart_sockaddr(rt->rt_parent->rt_gateway);\ - dump_rtentry(v6r->v6r_rt)); - - if (rt_key(v6r->v6r_rt)->sa_family != AF_INET6) - { - /* - * Hmmm, we must be a tunneling default route. Current - * conventional wisdom is that we can only see one in our - * "default router list," and that it was added manually. Using - * that assumption, get things right, including chasing the - * parent and using its rt_gateway sockaddr for rt_setgate. - */ - rt_setgate(rt,(struct sockaddr *)dst,rt->rt_parent->rt_gateway); - rc = 1; - } - else - { - rt_setgate(rt,(struct sockaddr *)dst,rt_key(v6r->v6r_rt)); - rt->rt_flags &= ~RTF_TUNNEL; /* In case cloned off an initially - tunnelling default route. */ - } - - DDO(IDL_GROSS_EVENT,\ - printf("After rt_setgate, rt is:\n");dump_rtentry(rt)); - - rt->rt_llinfo = malloc(sizeof(*v6c),M_DISCQ,M_NOWAIT); - if (rt->rt_llinfo == NULL) - { - DPRINTF(IDL_ERROR, ("add_defchild(): malloc failed.\n")); - /* Perhaps route should be freed here */ - } - else - { - v6c = (struct v6child *)rt->rt_llinfo; - insque(v6c,&v6r->v6r_children); - v6c->v6c_route = rt; - } - return rc; - } - else - { - /* - * Default route hit, but no default router children. - * - * Perhaps delete it? - */ - DPRINTF(IDL_ERROR,\ - ("Default route hit, but no default routers in list.\n")); - } - } - - /* Either on-link or in trouble. Needs to be coded. */ - DPRINTF(IDL_ERROR, ("On-link or in trouble in ipv6_rtrequest\n")); - - /* - * Convert off-link entry to indeterminate on-link entry. - * Subsequent code after a call to this function will do the right thing. - * (ipv6_rtrequest code to handle new on-link neighbors follows this.) - */ - rt->rt_flags = RTF_UP|RTF_LLINFO|RTF_HOST; - rt->rt_llinfo = NULL; - rt->rt_ifa->ifa_refcnt--; - rt->rt_ifa = NULL; - rt->rt_ifp = NULL; - bzero(rt->rt_gateway,rt->rt_gateway->sa_len); - rt->rt_gateway->sa_family = AF_LINK; - rt->rt_gateway->sa_len = sizeof(struct sockaddr_dl); - rt->rt_rmx.rmx_mtu = 0; - - /* - * QUESTION: If I do this, should I call ipv6_nsolicit() to complete - * this conversion from default route child to non-deterministic - * on-link neighbor? - * - * ANSWER: Yes, but not here. Just return 1, and let later code take - * care of the nsolicit. - */ - return 1; -} - -/*---------------------------------------------------------------------- - * add_netchild(): - * Given a network route child (i.e. non-default), - * put this child in the parent's descendant list. - ----------------------------------------------------------------------*/ - -static void -add_netchild(rt) - struct rtentry *rt; -{ - struct v6router *v6r; - struct v6child *v6c; - - if (rt->rt_parent == NULL) - { - DPRINTF(IDL_ERROR, - ("add_netchild: No parent route. (Must be manually added.)\n")); - return; - } - v6r = (struct v6router *)rt->rt_parent->rt_llinfo; - - v6c = malloc(sizeof(*v6c),M_DISCQ,M_NOWAIT); - if (v6c == NULL) - { - DPRINTF(IDL_ERROR, ("add_netchild(): malloc failed.\n")); - /* Perhaps should free route here */ - return; - } - insque(v6c,v6r->v6r_children.v6c_next); - v6c->v6c_route = rt; - v6c->v6c_parent = v6r; - rt->rt_llinfo = (caddr_t)v6c; -} - -/*---------------------------------------------------------------------- - * add_non_default(): - * add a non-default routing entry. - * - ----------------------------------------------------------------------*/ -static void -add_non_default(rt) - struct rtentry *rt; -{ - struct v6router *newbie; - - if (rt_key(rt)->sa_family != AF_INET6) - { - DPRINTF(IDL_ERROR, - ("IPv6 off-net non-tunnel route w/o IPv6 gwaddr.\n")); - return; - } - - newbie = malloc(sizeof(*newbie),M_DISCQ,M_NOWAIT); - if (newbie == NULL) - { - DPRINTF(IDL_ERROR, ("add_non_default(): malloc failed.\n")); - /* Should probably free route */ - return; - } - bzero(newbie,sizeof(*newbie)); - newbie->v6r_children.v6c_next = newbie->v6r_children.v6c_prev = - &newbie->v6r_children; - insque(newbie,&nondefrtr); - - /* - * On creation of rt, rt_setgate() was called, therefore we take on blind - * faith that an appropriate neighbor cache entry was created. If not, - * we're in deep trouble. - */ - newbie->v6r_rt = rt->rt_gwroute; - rt->rt_llinfo = (caddr_t)newbie; -} - - -/*---------------------------------------------------------------------- - * ipv6_setrtifa(): - * Set route's interface address. Source address selection for - * a route. - * - ----------------------------------------------------------------------*/ -void -ipv6_setrtifa(rt) - struct rtentry *rt; -{ - struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt); - struct sockaddr_in6 *src = (struct sockaddr_in6 *)rt->rt_ifa->ifa_addr; - struct in6_ifaddr *src_in6ifa = (struct in6_ifaddr *)rt->rt_ifa; - struct sockaddr_in6 *mask = (struct sockaddr_in6 *)rt_mask(rt); - struct ifaddr *ifa = NULL; - - DPRINTF(IDL_EVENT,("Entering ipv6_setrtifa.\n")); - - /* - * If I can't find a "better" source address, stick with the one I got. - * - * ASSUMES: rt_ifp is set PROPERLY. This NEEDS to be true. - */ - - /* - * If link-local, use link-local source. - */ - - if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) - { - if (IN6_IS_ADDR_LINKLOCAL(&src->sin6_addr)) - return; -#if __FreeBSD__ - for (ifa = rt->rt_ifp->if_addrhead.tqh_first; ifa; ifa = ifa->ifa_link.tqe_next) -#else /* __FreeBSD__ */ -#if __NetBSD__ || __OpenBSD__ - for (ifa = rt->rt_ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) -#else /* __NetBSD__ || __OpenBSD__ */ - for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) -#endif /* __NetBSD__ || __OpenBSD__ */ -#endif /* __FreeBSD__ */ - { - struct sockaddr_in6 *current = (struct sockaddr_in6 *)ifa->ifa_addr; - - if ((current->sin6_family != AF_INET6) || - IS_DEPRECATED((struct in6_ifaddr *)ifa)) - continue; /* For loop. */ - if (IN6_IS_ADDR_LINKLOCAL(¤t->sin6_addr)) - break; /* For loop. */ - } - if (ifa == NULL) - return; /* We're in real trouble. */ - } - - /* - * If v4-compatible, use v4-compatible source address. - */ - if (ifa == NULL && (sin6->sin6_addr.s6_addr32[0] == 0 && - sin6->sin6_addr.s6_addr32[1] == 0 && - sin6->sin6_addr.s6_addr32[2] == 0 && - sin6->sin6_addr.s6_addr32[3] != htonl(1) && - (mask == NULL || mask->sin6_len >= - sizeof(*mask) - sizeof(struct in_addr)))) - { - if (IN6_IS_ADDR_V4COMPAT(&src->sin6_addr) && !IS_DEPRECATED(src_in6ifa)) - return; -#if __FreeBSD__ - for (ifa = rt->rt_ifp->if_addrhead.tqh_first; ifa; ifa = ifa->ifa_link.tqe_next) -#else /* __FreeBSD__ */ -#if __NetBSD__ || __OpenBSD__ - for (ifa = rt->rt_ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) -#else /* __NetBSD__ || __OpenBSD__ */ - for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) -#endif /* __NetBSD__ || __OpenBSD__ */ -#endif /* __FreeBSD__ */ - { - struct sockaddr_in6 *current = (struct sockaddr_in6 *)ifa->ifa_addr; - - if ((current->sin6_family != AF_INET6) - || IS_DEPRECATED((struct in6_ifaddr *)ifa)) - continue; /* For loop. */ - if (IN6_IS_ADDR_V4COMPAT(¤t->sin6_addr)) - break; /* For loop. */ - } - /*if (ifa == NULL) - return;*/ /* if ifa == NULL here, pretend it's global, because - it is global! */ - } - - /* - * If site-local, use a site-local source address. - */ - - if (ifa == NULL && IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) - { - if (IN6_IS_ADDR_SITELOCAL(&src->sin6_addr) && !IS_DEPRECATED(src_in6ifa)) - return; -#ifdef __FreeBSD__ - for (ifa = rt->rt_ifp->if_addrhead.tqh_first; ifa; ifa = ifa->ifa_link.tqe_next) -#else /* __FreeBSD__ */ -#if __NetBSD__ || __OpenBSD__ - for (ifa = rt->rt_ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) -#else /* __NetBSD__ || __OpenBSD__ */ - for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) -#endif /* __NetBSD__ || __OpenBSD__ */ -#endif /* __FreeBSD__ */ - { - struct sockaddr_in6 *current = (struct sockaddr_in6 *)ifa->ifa_addr; - - if ((current->sin6_family != AF_INET6) - || IS_DEPRECATED((struct in6_ifaddr *)ifa)) - continue; /* For loop. */ - if (IN6_IS_ADDR_SITELOCAL(¤t->sin6_addr)) - break; /* For loop. */ - } - if (ifa == NULL) - return; /* We don't want to potentially pollute the global - internet with site-local traffic. If you feel - differently, comment out this ifa == NULL check - and fallthrough. */ - } - - if (ifa == NULL) - { - /* - * At this point, the address _could_ be anything, but is most likely - * a globally routable address that didn't fit into the previous - * categories. - * - * Do gyrations iff rt->rt_ifa's address is link-local and the dest - * isn't or the src address previously picked is deprecated. - */ - DPRINTF(IDL_GROSS_EVENT,("In default case of ipv6_setrtifa().\n")); - if ((!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && - IN6_IS_ADDR_LINKLOCAL(&src->sin6_addr)) || IS_DEPRECATED(src_in6ifa)) - { - struct ifaddr *ifa_compat = 0, *ifa_site = 0; - - /* - * For now, pick a non-link-local address using the following - * order of preference: global, compatible, site-local. - * - */ -#ifdef __FreeBSD__ - for (ifa = rt->rt_ifp->if_addrhead.tqh_first; ifa; ifa = ifa->ifa_link.tqe_next) -#else /* __FreeBSD__ */ -#if __NetBSD__ || __OpenBSD__ - for (ifa = rt->rt_ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) -#else /* __NetBSD__ || __OpenBSD__ */ - for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) -#endif /* __NetBSD__ || __OpenBSD__ */ -#endif /* __FreeBSD__ */ - if (ifa->ifa_addr->sa_family == AF_INET6 && - !IS_DEPRECATED((struct in6_ifaddr *)ifa) && - !IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { - if (IN6_IS_ADDR_V4COMPAT(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) - ifa_compat = ifa; - else if (IN6_IS_ADDR_SITELOCAL(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) - ifa_site = ifa; - else /* globally routable address */ - break; - } - if (!ifa) - ifa = ifa_compat ? ifa_compat : ifa_site; - } - } - - if (ifa != NULL) - { - /* - * Q: Do I call ipv6_rtrequest (through ifa_rtrequest) if I - * change ifa's on a route? - */ - /*if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) - rt->rt_ifa->ifa_rtrequest(RTM_DELETE,rt,rt->rt_gateway);*/ - IFAFREE(rt->rt_ifa); - ifa->ifa_refcnt++; - rt->rt_ifa = ifa; - rt->rt_ifp = ifa->ifa_ifp; /* Is this desirable? */ - /*if (ifa->ifa_rtrequest) - ifa->ifa_rtrequest(RTM_ADD, rt, rt->rt_gateway);*/ - } -} - - -/*---------------------------------------------------------------------- - * ipv6_rtrequest(): - * IPv6-specific route ADD, RESOLVE, and DELETE function. - * Typically called from route.c's rtrequest() function to handle - * the IPv6 unique things. - ----------------------------------------------------------------------*/ - -void -ipv6_rtrequest(req, rt, sa) - int req; - register struct rtentry *rt; - struct sockaddr *sa; /* Ignored parameter, I believe. */ -{ - static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}, *sdlp; - int spray = 0; - - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0000-Starting.\n")); - DPRINTF(IDL_EVENT,("req = %d, rt = 0x%lx, sa = 0x%lx\n",req,\ - (unsigned long)rt, (unsigned long)sa)); - DDO(IDL_EVENT,dump_rtentry(rt)); - - switch (req) - { - case RTM_ADD: - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0100-case RTM_ADD:.\n")); - - /* - * Set route Path MTU if not already set on brand new route. - */ - if (rt->rt_rmx.rmx_mtu == 0) - rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; - - /* - * An explicitly added "all-ones" mask or no mask at all should be - * a host route. - */ - - if (rt_mask(rt) == NULL || - (rt_mask(rt)->sa_len == sizeof(struct sockaddr_in6) && - IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6 *)rt_mask(rt))->sin6_addr, - &in6_allones.sin6_addr)) - ) - rt->rt_flags |= RTF_HOST; - - /* - * Explicitly add the cloning bit to the route entry. - * (Do we still want to do this?) - * - * One fallout from this is that if someone wants to disable cloning, - * the disabling will have to be explicitly done after adding the route. - */ - if ((rt->rt_flags & RTF_HOST) == 0) - { - /* - * All non-host routes that aren't m-cast are cloning! - */ - if (!IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr)) - rt->rt_flags |= RTF_CLONING; - - if (rt->rt_flags & RTF_TUNNEL) - { - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0150-Calling tunnel_parent().\n")); - tunnel_parent(rt); - } - - if (rt->rt_flags & RTF_GATEWAY) { - if (rt_mask(rt)->sa_len == 0) - { - if (rt->rt_flags & RTF_TUNNEL) - { - /* - * Add tunnel to default router list. - */ - ipv6_add_defrouter_rtrequest(rt); - } - else - { - struct v6router *v6r; - /* - * The "default" route has just been added. - * Do default router stuff here. - * - * Search router list to see if I'm already there. - * this avoids double-adding. - */ - - for (v6r = defrtr.v6r_next; v6r != &defrtr; - v6r = v6r->v6r_next) - if (v6r->v6r_rt == rt->rt_gwroute) - break; - - if (v6r == &defrtr) - { - DPRINTF(IDL_ERROR, - ("Calling ipv6_add_defrouter from RTM_ADD.\n")); - ipv6_add_defrouter_rtrequest(rt); - } - - rt->rt_gwroute->rt_flags |= RTF_ISAROUTER; - } - rt->rt_flags |= RTF_DEFAULT; - } - else - if (rt->rt_flags & RTF_TUNNEL) - { - /* - * Perhaps if the tunnel bit is already set here, don't - * do anything. - */ - } - else - { - /* - * A non-default network route has just been added. - * Do non-default router stuff here. - */ - add_non_default(rt); - } - } else if (!(rt->rt_flags & RTF_TUNNEL)) - { - /* - * Interface route (i.e. on-link non-host prefix). - */ - DPRINTF(IDL_EVENT,("Setting up i/f route.\n")); - rt_setgate(rt, rt_key(rt), (struct sockaddr *)&null_sdl); - sdlp = (struct sockaddr_dl *)rt->rt_gateway; - sdlp->sdl_type = rt->rt_ifp->if_type; - sdlp->sdl_index = rt->rt_ifp->if_index; - } - } - - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0199-Falling out of RTM_ADD:.\n")); - /* FALLTHROUGH... */ - case RTM_RESOLVE: - { -#ifdef __FreeBSD__ - extern struct ifnet loif[]; - struct ifnet *loifp = loif; -#else /* __FreeBSD__ */ -#if (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) - extern struct ifnet loif; -#else /* (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) */ - extern struct ifnet *loifp; -#endif /* (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) */ -#endif /* __FreeBSD__ */ - - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0200-Now in case RTM_RESOLVE:.\n")); - - /* - * First, check if ifa addr is same as route addr, - * If yes, then wire the loopback interface as the destination. - */ - if ((rt->rt_flags & RTF_HOST) && rt->rt_ifa && - IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, - &I6A_SIN(rt->rt_ifa)->sin6_addr) -#if (defined(_BSDI_VERSION) && (_BSDI_VERSION >= 199802)) - && loifp -#endif /* (defined(_BSDI_VERSION) && (_BSDI_VERSION >= 199802)) */ - ) - { - /* Change ifp to loopback and gateway to itself. */ -#ifdef __FreeBSD__ - rt->rt_ifp = loifp; - rt->rt_gateway = rt_key(rt); - rt->rt_rmx.rmx_mtu = loifp->if_mtu; -#else /* __FreeBSD__ */ -#if (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) - rt->rt_ifp = &loif; - rt->rt_gateway = rt_key(rt); - rt->rt_rmx.rmx_mtu = loif.if_mtu; -#else /* (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) */ - rt->rt_ifp = loifp; - rt->rt_gateway = rt_key(rt); - rt->rt_rmx.rmx_mtu = loifp->if_mtu; -#endif /* (!defined(_BSDI_VERSION) || (_BSDI_VERSION < 199802)) */ -#endif /* __FreeBSD__ */ - - if (rt->rt_parent) - rt->rt_flags &= ~(RTF_STATIC | RTF_TUNNEL); - - break; - }; - } - - /* - * Second, check the accuracy of the route's interface address (ifa). - * If possible, update the route's ifa such that it is the "best" - * source address for packets bound for this destination. - * - * This is done to any routes and is subtle enough - * to merit its own separate function: - */ - - ipv6_setrtifa(rt); - - if (!(rt->rt_flags & RTF_HOST)) - { - /* - * This should be the "none of the above" case. For now, - * do nothing and just return. - */ - DPRINTF(IDL_GROSS_EVENT,("In RESOLVE/lateADD, but not RTF_HOST.\n")); - break; - } - - /* - * At this point, I know (1) I'm a host route which has either been - * added manually or (2) I have cloned off to become either: - * - * a tunnelling route child, - * RTF_TUNNEL is set on this entry. - * I should be okay, although tunnel state may become necessary. - * I'm a next-hop cache entry. - * - * a default router child, - * a non-default network route child, - * RTF_GATEWAY is set on this entry. - * I have to insert this child into the router's children list. - * My child entry hangs off rt_llinfo. I'm a next-hop cache - * entry. - * - * an interface (i.e. neighbor) route child, - * a link-local (i.e. off link-local mask) route child - * rt->rt_gateway is AF_LINK - * I should set RTF_LLINFO, and set up a discq entry because I'm - * a neighbor cache entry. (Neighbor caches double as next-hop - * cache entries.) - */ - - if (rt->rt_gateway == NULL) - panic("ipv6_rtrequest(): No rt_gateway at the RTM_RESOLVE code."); - - /* - * Order of bit checking is very important. I check TUNNEL first, - * because it's REALLY special. Then I check GATEWAY or not. - */ - - if (rt->rt_parent != NULL && rt_mask(rt->rt_parent)->sa_len == 0) - { - DPRINTF(IDL_EVENT,("Cloning off default route!\n")); - /* - * Find a default router out of the list, and assign it to this - * child. Clear or add tunnel bits if necessary. - */ - - rt->rt_flags &= ~RTF_STATIC; - /* - * If add_defchild returns 0, then either it's a tunneling - * default route, or a link-local converted to a neighbor entry. - * - * Set 'spray' to the result of add_defchild, because if it is - * a neighbor entry (see AF_LINK case below), then spray will - * indicate the need to do some pre-emptive neighbor adverts. - */ - if (!(spray = add_defchild(rt))) /* If an actual off-net default - route... */ - break; -DPRINTF(IDL_ERROR,("add_defchild returned 1, either on-link or tunnel.\n")); - /* Otherwise, either tunnel or converted into LINK address. */ - } - else rt->rt_llinfo = NULL; /* Is this already done? */ - - if (rt->rt_flags & RTF_TUNNEL) - { - DPRINTF(IDL_EVENT,("ipv6_rtrequest():0250-Calling tunnel_child().\n")); - tunnel_child(rt); /* Be careful if manually added RTF_TUNNEL. */ - break; /* We're done with this Tunnel host route. */ - } - - if (rt->rt_flags & RTF_GATEWAY) - { - add_netchild(rt); - if (req == RTM_RESOLVE) - rt->rt_flags &= ~RTF_STATIC; - break; - } - - if (rt->rt_gateway->sa_family == AF_LINK) - { - /* - * I may enter here even after RTF_GATEWAY check because - * get_defrouter() may convert the route entry into an on-link one! - */ - struct discq *dq; - - rt->rt_llinfo = malloc(sizeof(*dq),M_DISCQ,M_NOWAIT); - dq = (struct discq *)rt->rt_llinfo; - if (dq == NULL) - { - DPRINTF(IDL_ERROR, - ("ipv6_rtrequest(): malloc for rt_llinfo failed.\n")); - /* Probably should free route */ - break; - } - bzero(dq,sizeof(*dq)); - dq->dq_rt = rt; - dq->dq_unanswered = -1; - rt->rt_flags |= RTF_LLINFO; - insque(dq,&dqhead); - /* - * State is already INCOMPLETE, because of link stuff. - * - * If this neigbor entry is caused by add_defchild (i.e. link-local) - * spray nsolicit out all interfaces. - */ - - if (spray) - ipv6_nsolicit(NULL,NULL,rt); - - break; - } - else -#if 0 - /* - * support for PPP goes here. - * Frame Relay, and ATM will probably probably be handled by the - * AF_LINK case. Other AF_* will be covered later. - */ - panic("ipv6_rtrequest: Not tunnel, not off-net, and not neighbor."); -#else /* 0 */ - { - DPRINTF(IDL_ERROR, ("ipv6_rtrequest: Not tunnel, not off-net, and not neighbor. rt is:\n")); - DDO(IDL_ERROR, dump_rtentry(rt)); - } -#endif /* 0 */ - - break; - case RTM_DELETE: - DPRINTF(IDL_GROSS_EVENT,("ipv6_rtrequest():0300-Now in case RTM_DELETE.\n")); - /* - * The FLUSH call ('route flush...') checks the ifp, perhaps I should - * fill that just in case. - */ - - if (rt->rt_ifp == NULL) - rt->rt_ifp = rt->rt_ifa->ifa_ifp; - - if ((rt->rt_flags & RTF_HOST) == 0) - { - /* - * Clean up after network routes. - */ - if (rt->rt_flags & RTF_TUNNEL) - { - DPRINTF(IDL_EVENT,("Cleaning up tunnel route.\n")); - tunnel_parent_clean(rt); - if (rt_mask(rt)->sa_len != 0) - return; /* If default route is RTF_TUNNEL, then continue. */ - } - if (rt->rt_flags & RTF_GATEWAY) { - if (rt_mask(rt)->sa_len == 0) - { - struct v6router *v6r; - - DPRINTF(IDL_GROSS_EVENT,\ - ("Cleaning up THE default route.\n")); - /* - * Find manually added default route thing, and clean up that - * entry. - * - * If user deletes default route added by receiving router - * adverts, then the router is still on the default router - * list, and needs to be added back. - */ - for (v6r = defrtr.v6r_next; v6r != &defrtr; - v6r = v6r->v6r_next) - { - /* - * PROBLEM: rt->rt_gwroute, which is what I REALLY - * want to check against, is gone at this - * point. - * - * POSSIBLE SOLUTION: Do a check with rt_key(v6r->v6r_rt) - * and rt->rt_gateway, but there - * is the question of tunneling - * default routes, etc., which may - * mean doing a masked match. - */ -#define equal(a1, a2) (bcmp((caddr_t)(a1), (caddr_t)(a2), (a1)->sa_len) == 0) - /* - * PRESENTED SOLUTION: Try checking the expiration - * (easy giveaway for manually - * added default routes), followed - * by blatant sockaddr compares - * (will nail all other normal - * cases), followed by sa_family - * check (may be unneccesary). - */ - if (v6r->v6r_expire == 0 || - equal(rt_key(v6r->v6r_rt),rt->rt_gateway) || - (rt->rt_gateway->sa_family != AF_INET6 && - rt->rt_gateway->sa_family == - rt_key(v6r->v6r_rt)->sa_family)) - break; - } - if (v6r != &defrtr) - (void)ipv6_delete_defrouter(v6r); - if (defrtr.v6r_next != &defrtr) - { - /* - * Somehow re-add the default route. - * - * The default route has been deleted from the radix - * tree already, so re-adding should be relatively - * straightforward. - */ - DPRINTF(IDL_ERROR, - ("Auto-added default routers still there!\n")); - } - } - else - { - struct v6router *v6r = (struct v6router *)rt->rt_llinfo; - struct v6child *v6c; - - /* Non-default router. */ - DPRINTF(IDL_GROSS_EVENT,\ - ("Cleaning up a non-{default,host} route.\n")); - - if (v6r == NULL) - panic("Non-default w/o v6router entry."); - - v6c = v6r->v6r_children.v6c_next; - while (v6c != v6c->v6c_next) - { - DPRINTF(IDL_ERROR,("Calling RTM_DELETE of child.\n")); - /* rtrequest() should remove child from the linked list */ - rtrequest(RTM_DELETE,rt_key(v6c->v6c_route),NULL,NULL,0, - NULL); - v6c = v6r->v6r_children.v6c_next; - } - remque(v6r); - free(v6r,M_DISCQ); - } - } - /* Anything else that isn't a HOST needs no work, so return. */ - return; - } - - DPRINTF(IDL_EVENT,("v6_discov_rtrequest() deleting a host\n")); - DPRINTF(IDL_EVENT,("I'm at a host-route point.\n")); - - if (rt->rt_flags & RTF_TUNNEL) - { - DPRINTF(IDL_EVENT,("Tunneling child.\n")); - /* - * PROBLEM: Following check will die if parent went bye-bye. - * See if you can fix in another way. - */ - /*if (rt_mask(rt->rt_parent)->sa_len == 0)*/ - if (rt->rt_flags & RTF_DEFAULT) - { - /* - * Tunneling default route child. Clean off meta-state. - */ - struct v6child *v6c = (struct v6child *)rt->rt_llinfo; - - DPRINTF(IDL_ERROR,("Cleaning tunnel-default child.\n")); - remque(v6c); - rt->rt_llinfo = NULL; - free(v6c,M_DISCQ); - } - tunnel_child_clean(rt); - } - else if (rt->rt_flags & RTF_GATEWAY) - { - struct v6child *v6c = (struct v6child *) rt->rt_llinfo; - - if (v6c == NULL) - { - if (rt->rt_flags & RTF_HOST) { - DPRINTF(IDL_ERROR, - ("no v6c in RTM_DELETE of RTF_GATEWAY.\n")); - } - } - else - { - remque(v6c); - rt->rt_llinfo = NULL; - free(v6c,M_DISCQ); - } - } - else if (rt->rt_flags & RTF_LLINFO) - { - struct discq *dq; - - /* Neighbor cache entry. */ - if (rt->rt_flags & RTF_ISAROUTER) - { - struct v6router *v6r,*head; - - /* Clean up all children of this router. */ - - DPRINTF(IDL_GROSS_EVENT,("Cleaning up router neighbor.\n")); - if (rt->rt_flags & RTF_DEFAULT) - head = &defrtr; - else - { - head = &nondefrtr; - /* Q: Do I want to delete the actual network route too? */ - /* Q2: Do I want to delete the children? */ - } - - for (v6r = head->v6r_next; v6r != head; v6r = v6r->v6r_next) - if (v6r->v6r_rt == rt) - break; - if (v6r == head) - { - /* - * At many addresses per interface, this isn't a huge - * problem, because a router's on-link address might not - * be tied to a router entry. - */ - DPRINTF(IDL_EVENT, - ("Router neighbor inconsistency.\n")); - } - else - if (head == &defrtr) - (void) ipv6_delete_defrouter(v6r); /* This gets rid of - children, too! */ - } - - dq = (struct discq *)rt->rt_llinfo; - rt->rt_flags &= ~RTF_LLINFO; - if (dq == NULL) - panic("No discq or other rt_llinfo in RTM_DELETE"); - remque(dq); - rt->rt_llinfo = NULL; - if (dq->dq_queue) - { - /* Send ICMP unreachable error. */ - ipv6_icmp_error(dq->dq_queue, ICMPV6_UNREACH, - ICMPV6_UNREACH_ADDRESS, 0); - /* m_freem(dq->dq_queue);*/ - } - free(dq,M_DISCQ); - } - else - { - DPRINTF(IDL_GROSS_EVENT,\ - ("Freeing self-wired address. Doing nothing.\n")); - } - break; - } - DPRINTF(IDL_GROSS_EVENT,("ipv6_rtrequest():1000-Finished.\n")); -} - -/* EOF */ |