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Revert r292275 & r292379

Browse Source 
glebius has concerns about these changes so reverting those can be discussed
and addressed.

Sponsored by:	Multiplay
This commit is contained in:
Steven Hartland 2015-12-17 14:41:30 +00:00
parent 2a952cf258
commit d6e82913c1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=292402
13 changed files with 66 additions and 289 deletions
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24
sys/net/if.c
View File

@ -126,7 +126,7 @@ SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
void (*bridge_linkstate_p)(struct ifnet *ifp);
void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
void (*lagg_linkstate_p)(struct ifnet *ifp);
void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
/* These are external hooks for CARP. */
void (*carp_linkstate_p)(struct ifnet *ifp);
void (*carp_demote_adj_p)(int, char *);
@ -1984,8 +1984,6 @@ if_unroute(struct ifnet *ifp, int flag, int fam)
if (ifp->if_carp)
(*carp_linkstate_p)(ifp);
if (ifp->if_lagg)
(*lagg_linkstate_p)(ifp);
rt_ifmsg(ifp);
}
@ -2007,8 +2005,6 @@ if_route(struct ifnet *ifp, int flag, int fam)
pfctlinput(PRC_IFUP, ifa->ifa_addr);
if (ifp->if_carp)
(*carp_linkstate_p)(ifp);
if (ifp->if_lagg)
(*lagg_linkstate_p)(ifp);
rt_ifmsg(ifp);
#ifdef INET6
in6_if_up(ifp);
@ -2023,27 +2019,17 @@ int (*vlan_tag_p)(struct ifnet *, uint16_t *);
int (*vlan_setcookie_p)(struct ifnet *, void *);
void *(*vlan_cookie_p)(struct ifnet *);
void
if_link_state_change(struct ifnet *ifp, int link_state)
{
return if_link_state_change_cond(ifp, link_state, 0);
}
/*
* Handle a change in the interface link state. To avoid LORs
* between driver lock and upper layer locks, as well as possible
* recursions, we post event to taskqueue, and all job
* is done in static do_link_state_change().
*
* If the current link state matches link_state and force isn't
* specified no action is taken.
*/
void
if_link_state_change_cond(struct ifnet *ifp, int link_state, int force)
if_link_state_change(struct ifnet *ifp, int link_state)
{
if (ifp->if_link_state == link_state && !force)
/* Return if state hasn't changed. */
if (ifp->if_link_state == link_state)
return;
ifp->if_link_state = link_state;
@ -2071,7 +2057,7 @@ do_link_state_change(void *arg, int pending)
if (ifp->if_bridge)
(*bridge_linkstate_p)(ifp);
if (ifp->if_lagg)
(*lagg_linkstate_p)(ifp);
(*lagg_linkstate_p)(ifp, link_state);
if (IS_DEFAULT_VNET(curvnet))
devctl_notify("IFNET", ifp->if_xname,

13
sys/net/if_lagg.c
View File

@ -106,7 +106,7 @@ static int lagg_port_create(struct lagg_softc *, struct ifnet *);
static int lagg_port_destroy(struct lagg_port *, int);
static struct mbuf *lagg_input(struct ifnet *, struct mbuf *);
static void lagg_linkstate(struct lagg_softc *);
static void lagg_port_state(struct ifnet *);
static void lagg_port_state(struct ifnet *, int);
static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
static int lagg_port_output(struct ifnet *, struct mbuf *,
const struct sockaddr *, struct route *);
@ -1774,12 +1774,7 @@ lagg_linkstate(struct lagg_softc *sc)
break;
}
}
/*
* Force state change to ensure ifnet_link_event is generated allowing
* protocols to notify other nodes of potential address move.
*/
if_link_state_change_cond(sc->sc_ifp, new_link, 1);
if_link_state_change(sc->sc_ifp, new_link);
/* Update if_baudrate to reflect the max possible speed */
switch (sc->sc_proto) {
@ -1802,7 +1797,7 @@ lagg_linkstate(struct lagg_softc *sc)
}
static void
lagg_port_state(struct ifnet *ifp)
lagg_port_state(struct ifnet *ifp, int state)
{
struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
struct lagg_softc *sc = NULL;
@ -1818,7 +1813,7 @@ lagg_port_state(struct ifnet *ifp)
LAGG_WUNLOCK(sc);
}
static struct lagg_port *
struct lagg_port *
lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
{
struct lagg_port *lp_next, *rval = NULL;

2
sys/net/if_lagg.h
View File

@ -281,7 +281,7 @@ struct lagg_port {
#define LAGG_UNLOCK_ASSERT(_sc) rm_assert(&(_sc)->sc_mtx, RA_UNLOCKED)
extern struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *);
extern void (*lagg_linkstate_p)(struct ifnet *);
extern void (*lagg_linkstate_p)(struct ifnet *, int );
int lagg_enqueue(struct ifnet *, struct mbuf *);

1
sys/net/if_var.h
View File

@ -500,7 +500,6 @@ struct ifmultiaddr *
void if_free(struct ifnet *);
void if_initname(struct ifnet *, const char *, int);
void if_link_state_change(struct ifnet *, int);
void if_link_state_change_cond(struct ifnet *, int, int);
int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
void if_ref(struct ifnet *);
void if_rele(struct ifnet *);

96
sys/netinet/if_ether.c
View File

@ -107,7 +107,6 @@ VNET_PCPUSTAT_SYSUNINIT(arpstat);
#endif /* VIMAGE */
static VNET_DEFINE(int, arp_maxhold) = 1;
static VNET_DEFINE(int, arp_on_link) = 1;
#define V_arpt_keep VNET(arpt_keep)
#define V_arpt_down VNET(arpt_down)
@ -115,7 +114,6 @@ static VNET_DEFINE(int, arp_on_link) = 1;
#define V_arp_maxtries VNET(arp_maxtries)
#define V_arp_proxyall VNET(arp_proxyall)
#define V_arp_maxhold VNET(arp_maxhold)
#define V_arp_on_link VNET(arp_on_link)
SYSCTL_INT(_net_link_ether_inet, OID_AUTO, max_age, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(arpt_keep), 0,
@ -138,9 +136,6 @@ SYSCTL_INT(_net_link_ether_inet, OID_AUTO, max_log_per_second,
CTLFLAG_RW, &arp_maxpps, 0,
"Maximum number of remotely triggered ARP messages that can be "
"logged per second");
SYSCTL_INT(_net_link_ether_inet, OID_AUTO, arp_on_link, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(arp_on_link), 0,
"Send gratuitous ARP's on interface link up events");
#define ARP_LOG(pri, ...) do { \
if (ppsratecheck(&arp_lastlog, &arp_curpps, arp_maxpps)) \
@ -161,7 +156,6 @@ static void arp_mark_lle_reachable(struct llentry *la);
static void arp_iflladdr(void *arg __unused, struct ifnet *ifp);
static eventhandler_tag iflladdr_tag;
static eventhandler_tag ifnet_link_event_tag;
static const struct netisr_handler arp_nh = {
.nh_name = "arp",
@ -1190,99 +1184,43 @@ arp_ifinit(struct ifnet *ifp, struct ifaddr *ifa)
if (ntohl(dst_in->sin_addr.s_addr) == INADDR_ANY)
return;
arp_announce_addr(ifp, &dst_in->sin_addr, IF_LLADDR(ifp));
arp_announce_ifaddr(ifp, dst_in->sin_addr, IF_LLADDR(ifp));
arp_add_ifa_lle(ifp, dst);
}
void __noinline
arp_announce_addr(struct ifnet *ifp, const struct in_addr *addr, u_char *enaddr)
void
arp_announce_ifaddr(struct ifnet *ifp, struct in_addr addr, u_char *enaddr)
{
if (ntohl(addr->s_addr) != INADDR_ANY)
arprequest(ifp, addr, addr, enaddr);
if (ntohl(addr.s_addr) != INADDR_ANY)
arprequest(ifp, &addr, &addr, enaddr);
}
/*
* Send gratuitous ARPs for all interfaces addresses to notify other nodes of
* changes.
*
* This is a noop if the interface isn't up or has been flagged for no ARP.
* Sends gratuitous ARPs for each ifaddr to notify other
* nodes about the address change.
*/
void __noinline
arp_announce(struct ifnet *ifp)
static __noinline void
arp_handle_ifllchange(struct ifnet *ifp)
{
int i, cnt, entries;
u_char *lladdr;
struct ifaddr *ifa;
struct in_addr *addr, *head;
if (!(ifp->if_flags & IFF_UP) || (ifp->if_flags & IFF_NOARP) ||
ifp->if_addr == NULL)
return;
entries = 8;
cnt = 0;
head = malloc(sizeof(*addr) * entries, M_TEMP, M_NOWAIT);
if (head == NULL) {
log(LOG_INFO, "arp_announce: malloc %d entries failed\n",
entries);
return;
}
/* Take a copy then process to avoid locking issues. */
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family != AF_INET)
continue;
if (cnt == entries) {
addr = (struct in_addr *)realloc(head, sizeof(*addr) *
(entries + 8), M_TEMP, M_NOWAIT);
if (addr == NULL) {
log(LOG_INFO, "arp_announce: realloc to %d "
"entries failed\n", entries + 8);
/* Process what we have. */
break;
}
entries += 8;
head = addr;
}
addr = head + cnt;
bcopy(IFA_IN(ifa), addr, sizeof(*addr));
cnt++;
if (ifa->ifa_addr->sa_family == AF_INET)
arp_ifinit(ifp, ifa);
}
IF_ADDR_RUNLOCK(ifp);
if (cnt > 0) {
lladdr = IF_LLADDR(ifp);
for (i = 0; i < cnt; i++) {
arp_announce_addr(ifp, head + i, lladdr);
}
}
free(head, M_TEMP);
}
/*
* A handler for interface linkstate change events.
*/
static void
arp_ifnet_link_event(void *arg __unused, struct ifnet *ifp, int linkstate)
{
if (linkstate == LINK_STATE_UP && V_arp_on_link)
arp_announce(ifp);
}
/*
* A handler for interface link layer address change events.
* A handler for interface link layer address change event.
*/
static __noinline void
arp_iflladdr(void *arg __unused, struct ifnet *ifp)
{
arp_announce(ifp);
if ((ifp->if_flags & IFF_UP) != 0)
arp_handle_ifllchange(ifp);
}
static void
@ -1290,12 +1228,8 @@ arp_init(void)
{
netisr_register(&arp_nh);
if (IS_DEFAULT_VNET(curvnet)) {
if (IS_DEFAULT_VNET(curvnet))
iflladdr_tag = EVENTHANDLER_REGISTER(iflladdr_event,
arp_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
ifnet_link_event_tag = EVENTHANDLER_REGISTER(ifnet_link_event,
arp_ifnet_link_event, 0, EVENTHANDLER_PRI_ANY);
}
}
SYSINIT(arp, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, arp_init, 0);

3
sys/netinet/if_ether.h
View File

@ -119,8 +119,7 @@ int arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m,
void arprequest(struct ifnet *, const struct in_addr *,
const struct in_addr *, u_char *);
void arp_ifinit(struct ifnet *, struct ifaddr *);
void arp_announce(struct ifnet *);
void arp_announce_addr(struct ifnet *, const struct in_addr *addr, u_char *);
void arp_announce_ifaddr(struct ifnet *, struct in_addr addr, u_char *);
#endif
#endif

3
sys/netinet/in_var.h
View File

@ -129,9 +129,6 @@ extern struct rmlock in_ifaddr_lock;
#define IN_IFADDR_WLOCK_ASSERT() rm_assert(&in_ifaddr_lock, RA_WLOCKED)
#define IN_IFADDR_WUNLOCK() rm_wunlock(&in_ifaddr_lock)
#define IFA_IN(ifa) \
(&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr)
/*
* Macro for finding the internet address structure (in_ifaddr)
* corresponding to one of our IP addresses (in_addr).

17
sys/netinet/ip_carp.c
View File

@ -1009,12 +1009,13 @@ static void
carp_send_arp(struct carp_softc *sc)
{
struct ifaddr *ifa;
struct in_addr addr;
CARP_FOREACH_IFA(sc, ifa) {
if (ifa->ifa_addr->sa_family != AF_INET)
continue;
arp_announce_addr(sc->sc_carpdev, IFA_IN(ifa),
LLADDR(&sc->sc_addr));
addr = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
arp_announce_ifaddr(sc->sc_carpdev, addr, LLADDR(&sc->sc_addr));
}
}
@ -1036,16 +1037,18 @@ carp_iamatch(struct ifaddr *ifa, uint8_t **enaddr)
static void
carp_send_na(struct carp_softc *sc)
{
static struct in6_addr mcast = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
struct ifaddr *ifa;
struct in6_addr *in6;
CARP_FOREACH_IFA(sc, ifa) {
if (ifa->ifa_addr->sa_family != AF_INET6 ||
IFA_ND6_NA_UNSOLICITED_SKIP(ifa))
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
nd6_na_output_unsolicited_addr(sc->sc_carpdev, IFA_IN6(ifa),
IFA_ND6_NA_BASE_FLAGS(sc->sc_carpdev, ifa));
DELAY(nd6_na_unsolicited_addr_delay(ifa));
in6 = IFA_IN6(ifa);
nd6_na_output(sc->sc_carpdev, &mcast, in6,
ND_NA_FLAG_OVERRIDE, 1, NULL);
DELAY(1000); /* XXX */
}
}

2
sys/netinet6/in6.c
View File

@ -114,7 +114,7 @@ VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
/*
* Definitions of some constant IP6 addresses.
* Definitions of some costant IP6 addresses.
*/
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;

10
sys/netinet6/in6_var.h
View File

@ -399,16 +399,6 @@ struct in6_rrenumreq {
#define IA6_SIN6(ia) (&((ia)->ia_addr))
#define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
#define IFA_IN6(x) (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
#define IFA_IN6_FLAGS(ifa) ((struct in6_ifaddr *)ifa)->ia6_flags
#define IFA_ND6_NA_BASE_FLAGS(ifp, ifa) \
(IFA_IN6_FLAGS(ifa) & IN6_IFF_ANYCAST ? 0 : ND_NA_FLAG_OVERRIDE) | \
((V_ip6_forwarding && !(ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && \
V_ip6_norbit_raif)) ? ND_NA_FLAG_ROUTER : 0)
#define IFA_ND6_NA_UNSOLICITED_SKIP(ifa) \
(IFA_IN6_FLAGS(ifa) & (IN6_IFF_DUPLICATED | IN6_IFF_DEPRECATED | \
IN6_IFF_TENTATIVE)) != 0
#define IN6_MAX_ANYCAST_DELAY_TIME_MS 1000000
#define IN6_BROADCAST_DELAY_TIME_MS 1000
#define IFA_DSTIN6(x) (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
#define IFPR_IN6(x) (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)

36
sys/netinet6/nd6.c
View File

@ -38,7 +38,6 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/random.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
@ -103,12 +102,8 @@ VNET_DEFINE(int, nd6_maxnudhint) = 0; /* max # of subsequent upper
* layer hints */
static VNET_DEFINE(int, nd6_maxqueuelen) = 1; /* max pkts cached in unresolved
* ND entries */
static VNET_DEFINE(int, nd6_on_link) = 1; /* Send unsolicited ND's on link up */
#define V_nd6_maxndopt VNET(nd6_maxndopt)
#define V_nd6_maxqueuelen VNET(nd6_maxqueuelen)
#define V_nd6_on_link VNET(nd6_on_link)
#ifdef ND6_DEBUG
VNET_DEFINE(int, nd6_debug) = 1;
@ -117,7 +112,6 @@ VNET_DEFINE(int, nd6_debug) = 0;
#endif
static eventhandler_tag lle_event_eh;
static eventhandler_tag ifnet_link_event_eh;
/* for debugging? */
#if 0
@ -202,14 +196,6 @@ nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB);
}
static void
nd6_ifnet_link_event(void *arg __unused, struct ifnet *ifp, int linkstate)
{
if (linkstate == LINK_STATE_UP && V_nd6_on_link)
nd6_na_output_unsolicited(ifp);
}
void
nd6_init(void)
{
@ -225,12 +211,9 @@ nd6_init(void)
nd6_slowtimo, curvnet);
nd6_dad_init();
if (IS_DEFAULT_VNET(curvnet)) {
if (IS_DEFAULT_VNET(curvnet))
lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
NULL, EVENTHANDLER_PRI_ANY);
ifnet_link_event_eh = EVENTHANDLER_REGISTER(ifnet_link_event,
nd6_ifnet_link_event, NULL, EVENTHANDLER_PRI_ANY);
}
}
#ifdef VIMAGE
@ -240,10 +223,8 @@ nd6_destroy()
callout_drain(&V_nd6_slowtimo_ch);
callout_drain(&V_nd6_timer_ch);
if (IS_DEFAULT_VNET(curvnet)) {
if (IS_DEFAULT_VNET(curvnet))
EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
EVENTHANDLER_DEREGISTER(ifnet_link_event, ifnet_link_event_eh);
}
}
#endif
@ -2476,18 +2457,13 @@ static int nd6_sysctl_prlist(SYSCTL_HANDLER_ARGS);
SYSCTL_DECL(_net_inet6_icmp6);
#endif
SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
CTLFLAG_RD, nd6_sysctl_drlist, "List default routers");
CTLFLAG_RD, nd6_sysctl_drlist, "");
SYSCTL_NODE(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
CTLFLAG_RD, nd6_sysctl_prlist, "List prefixes");
CTLFLAG_RD, nd6_sysctl_prlist, "");
SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXQLEN, nd6_maxqueuelen,
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1,
"Max packets cached in unresolved ND entries");
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxqueuelen), 1, "");
SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_gctimer,
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24),
"Interface in seconds between garbage collection passes");
SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_on_link, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(nd6_on_link), 0,
"Send unsolicited neighbor discovery on interface link up events");
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_gctimer), (60 * 60 * 24), "");
static int
nd6_sysctl_drlist(SYSCTL_HANDLER_ARGS)

4
sys/netinet6/nd6.h
View File

@ -398,10 +398,6 @@ void nd6_init(void);
#ifdef VIMAGE
void nd6_destroy(void);
#endif
void nd6_na_output_unsolicited(struct ifnet *);
void nd6_na_output_unsolicited_addr(struct ifnet *, const struct in6_addr *,
u_long);
int nd6_na_unsolicited_addr_delay(struct ifaddr *);
struct nd_ifinfo *nd6_ifattach(struct ifnet *);
void nd6_ifdetach(struct nd_ifinfo *);
int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);

144
sys/netinet6/nd6_nbr.c
View File

@ -124,16 +124,20 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
struct in6_addr saddr6 = ip6->ip6_src;
struct in6_addr daddr6 = ip6->ip6_dst;
struct in6_addr taddr6;
struct in6_addr myaddr6;
char *lladdr = NULL;
struct ifaddr *ifa = NULL;
u_long flags;
int lladdrlen = 0;
int proxy = 0;
int anycast = 0, proxy = 0, tentative = 0;
int tlladdr;
int rflag;
union nd_opts ndopts;
struct sockaddr_dl proxydl;
char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN];
rflag = (V_ip6_forwarding) ? ND_NA_FLAG_ROUTER : 0;
if (ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV && V_ip6_norbit_raif)
rflag = 0;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, icmp6len,);
nd_ns = (struct nd_neighbor_solicit *)((caddr_t)ip6 + off);
@ -225,7 +229,10 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
* In implementation, we add target link-layer address by default.
* We do not add one in MUST NOT cases.
*/
tlladdr = !IN6_IS_ADDR_MULTICAST(&daddr6);
if (!IN6_IS_ADDR_MULTICAST(&daddr6))
tlladdr = 0;
else
tlladdr = 1;
/*
* Target address (taddr6) must be either:
@ -282,6 +289,9 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
*/
goto freeit;
}
myaddr6 = *IFA_IN6(ifa);
anycast = ((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST;
tentative = ((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_TENTATIVE;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DUPLICATED)
goto freeit;
@ -293,7 +303,7 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
goto bad;
}
if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &saddr6)) {
if (IN6_ARE_ADDR_EQUAL(&myaddr6, &saddr6)) {
nd6log((LOG_INFO, "nd6_ns_input: duplicate IP6 address %s\n",
ip6_sprintf(ip6bufs, &saddr6)));
goto freeit;
@ -311,7 +321,7 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
*
* The processing is defined in RFC 2462.
*/
if (IFA_IN6_FLAGS(ifa) & IN6_IFF_TENTATIVE) {
if (tentative) {
/*
* If source address is unspecified address, it is for
* duplicate address detection.
@ -325,10 +335,6 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
goto freeit;
}
flags = IFA_ND6_NA_BASE_FLAGS(ifp, ifa);
if (proxy || !tlladdr)
flags &= ~ND_NA_FLAG_OVERRIDE;
/*
* If the source address is unspecified address, entries must not
* be created or updated.
@ -343,16 +349,20 @@ nd6_ns_input(struct mbuf *m, int off, int icmp6len)
in6_all = in6addr_linklocal_allnodes;
if (in6_setscope(&in6_all, ifp, NULL) != 0)
goto bad;
nd6_na_output_fib(ifp, &in6_all, &taddr6, flags, tlladdr,
proxy ? (struct sockaddr *)&proxydl : NULL, M_GETFIB(m));
nd6_na_output_fib(ifp, &in6_all, &taddr6,
((anycast || proxy || !tlladdr) ? 0 : ND_NA_FLAG_OVERRIDE) |
rflag, tlladdr, proxy ? (struct sockaddr *)&proxydl : NULL,
M_GETFIB(m));
goto freeit;
}
nd6_cache_lladdr(ifp, &saddr6, lladdr, lladdrlen,
ND_NEIGHBOR_SOLICIT, 0);
nd6_na_output_fib(ifp, &saddr6, &taddr6, flags | ND_NA_FLAG_SOLICITED,
tlladdr, proxy ? (struct sockaddr *)&proxydl : NULL, M_GETFIB(m));
nd6_na_output_fib(ifp, &saddr6, &taddr6,
((anycast || proxy || !tlladdr) ? 0 : ND_NA_FLAG_OVERRIDE) |
rflag | ND_NA_FLAG_SOLICITED, tlladdr,
proxy ? (struct sockaddr *)&proxydl : NULL, M_GETFIB(m));
freeit:
if (ifa != NULL)
ifa_free(ifa);
@ -1587,111 +1597,3 @@ nd6_dad_na_input(struct ifaddr *ifa)
nd6_dad_rele(dp);
}
}
/*
* Send unsolicited neighbor advertisements for all interface addresses to
* notify other nodes of changes.
*
* This is a noop if the interface isn't up.
*/
void __noinline
nd6_na_output_unsolicited(struct ifnet *ifp)
{
int i, cnt, entries;
struct ifaddr *ifa;
struct ann {
struct in6_addr addr;
u_long flags;
int delay;
} *ann1, *head;
if (!(ifp->if_flags & IFF_UP))
return;
entries = 8;
cnt = 0;
head = malloc(sizeof(struct ann) * entries, M_TEMP, M_WAITOK);
/* Take a copy then process to avoid locking issues. */
IF_ADDR_RLOCK(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family != AF_INET6 ||
IFA_ND6_NA_UNSOLICITED_SKIP(ifa))
continue;
if (cnt == entries) {
ann1 = (struct ann*)realloc(head, sizeof(struct ann) *
(entries + 8), M_TEMP, M_NOWAIT);
if (ann1 == NULL) {
log(LOG_INFO, "nd6_announce: realloc to %d "
"entries failed\n", entries + 8);
/* Process what we have. */
break;
}
entries += 8;
head = ann1;
}
ann1 = head + cnt;
bcopy(IFA_IN6(ifa), &ann1->addr, sizeof(ann1->addr));
ann1->flags = IFA_ND6_NA_BASE_FLAGS(ifp, ifa);
ann1->delay = nd6_na_unsolicited_addr_delay(ifa);
cnt++;
}
IF_ADDR_RUNLOCK(ifp);
for (i = 0; i < cnt;) {
ann1 = head + i;
nd6_na_output_unsolicited_addr(ifp, &ann1->addr, ann1->flags);
i++;
if (i == cnt)
break;
/* XXX DELAY needs to be done in taskqueue to avoid stalling. */
//DELAY(ann1->delay);
}
free(head, M_TEMP);
}
/*
* Return the delay required for announcements of the address as per RFC 4861.
*/
int
nd6_na_unsolicited_addr_delay(struct ifaddr *ifa)
{
if (IFA_IN6_FLAGS(ifa) & IN6_IFF_ANYCAST) {
/*
* Random value between 0 and MAX_ANYCAST_DELAY_TIME
* as per section 7.2.7.
*/
return (random() % IN6_MAX_ANYCAST_DELAY_TIME_MS);
}
/* Small delay as per section 7.2.6. */
return (IN6_BROADCAST_DELAY_TIME_MS);
}
/*
* Send an unsolicited neighbor advertisement for an address to notify other
* nodes of changes.
*/
void __noinline
nd6_na_output_unsolicited_addr(struct ifnet *ifp, const struct in6_addr *addr,
u_long flags)
{
int error;
struct in6_addr mcast;
mcast = in6addr_linklocal_allnodes;
if ((error = in6_setscope(&mcast, ifp, NULL)) != 0) {
/*
* This shouldn't by possible as the only error is for loopback
* address which we're not using.
*/
log(LOG_INFO, "in6_setscope: on mcast failed: %d\n", error);
return;
}
nd6_na_output(ifp, &mcast, addr, flags, 1, NULL);
}