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Nest: Maintain separate IPv4, IPv6 and LLv6 preferred addresses
Also redesign preferred address selection and update protocols to use appropriate preferred address. Based on a previous work by Jan Maria Matejka.
This commit is contained in:
Ondrej Zajicek (work)
parent
4ae3ee1200
commit
153f02da3b
226
nest/iface.c
226
nest/iface.c
@ -32,11 +32,14 @@
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#include "lib/resource.h"
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#include "lib/string.h"
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#include "conf/conf.h"
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#include "sysdep/unix/krt.h"
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static pool *if_pool;
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list iface_list;
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static void if_recalc_preferred(struct iface *i);
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/**
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* ifa_dump - dump interface address
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* @a: interface address descriptor
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@ -183,6 +186,7 @@ if_send_notify(struct proto *p, unsigned c, struct iface *i)
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(c & IF_CHANGE_DOWN) ? "goes down" :
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(c & IF_CHANGE_MTU) ? "changes MTU" :
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(c & IF_CHANGE_LINK) ? "changes link" :
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(c & IF_CHANGE_PREFERRED) ? "changes preferred address" :
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(c & IF_CHANGE_CREATE) ? "created" :
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"sends unknown event");
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p->if_notify(p, c, i);
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@ -211,20 +215,14 @@ if_notify_change(unsigned c, struct iface *i)
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if (c & IF_CHANGE_DOWN)
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WALK_LIST(a, i->addrs)
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{
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a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
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ifa_notify_change_(IF_CHANGE_DOWN, a);
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}
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ifa_notify_change_(IF_CHANGE_DOWN, a);
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WALK_LIST(p, proto_list)
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if_send_notify(p, c, i);
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if (c & IF_CHANGE_UP)
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WALK_LIST(a, i->addrs)
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{
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a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
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ifa_notify_change_(IF_CHANGE_UP, a);
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}
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ifa_notify_change_(IF_CHANGE_UP, a);
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if (c & IF_CHANGE_UP)
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neigh_if_up(i);
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@ -233,24 +231,23 @@ if_notify_change(unsigned c, struct iface *i)
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neigh_if_link(i);
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}
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static unsigned
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if_recalc_flags(struct iface *i, unsigned flags)
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static uint
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if_recalc_flags(struct iface *i UNUSED, uint flags)
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{
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if ((flags & (IF_SHUTDOWN | IF_TMP_DOWN)) ||
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!(flags & IF_ADMIN_UP) ||
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!i->addr)
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flags &= ~IF_UP;
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else
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if ((flags & IF_ADMIN_UP) && !(flags & (IF_SHUTDOWN | IF_TMP_DOWN)))
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flags |= IF_UP;
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else
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flags &= ~IF_UP;
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return flags;
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}
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static void
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if_change_flags(struct iface *i, unsigned flags)
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if_change_flags(struct iface *i, uint flags)
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{
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unsigned of = i->flags;
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uint of = i->flags;
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i->flags = if_recalc_flags(i, flags);
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if ((i->flags ^ of) & IF_UP)
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if_notify_change((i->flags & IF_UP) ? IF_CHANGE_UP : IF_CHANGE_DOWN, i);
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}
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@ -298,7 +295,6 @@ if_update(struct iface *new)
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WALK_LIST(i, iface_list)
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if (!strcmp(new->name, i->name))
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{
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new->addr = i->addr;
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new->flags = if_recalc_flags(new, new->flags);
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c = if_what_changed(i, new);
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if (c & IF_CHANGE_TOO_MUCH) /* Changed a lot, convert it to down/up */
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@ -306,10 +302,13 @@ if_update(struct iface *new)
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DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
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if_change_flags(i, i->flags | IF_TMP_DOWN);
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rem_node(&i->n);
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new->addr = i->addr;
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new->addr4 = i->addr4;
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new->addr6 = i->addr6;
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new->llv6 = i->llv6;
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new->sysdep = i->sysdep;
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memcpy(&new->addrs, &i->addrs, sizeof(i->addrs));
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memcpy(i, new, sizeof(*i));
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i->flags &= ~IF_UP; /* IF_TMP_DOWN will be added later */
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i->flags &= ~IF_UP; /* IF_TMP_DOWN will be added later */
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goto newif;
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}
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@ -340,13 +339,16 @@ if_start_update(void)
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{
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i->flags &= ~IF_UPDATED;
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WALK_LIST(a, i->addrs)
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a->flags &= ~IF_UPDATED;
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a->flags &= ~IA_UPDATED;
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}
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}
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void
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if_end_partial_update(struct iface *i)
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{
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if (i->flags & IF_NEEDS_RECALC)
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if_recalc_preferred(i);
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if (i->flags & IF_TMP_DOWN)
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if_change_flags(i, i->flags & ~IF_TMP_DOWN);
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}
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@ -364,7 +366,7 @@ if_end_update(void)
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else
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{
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WALK_LIST_DELSAFE(a, b, i->addrs)
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if (!(a->flags & IF_UPDATED))
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if (!(a->flags & IA_UPDATED))
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ifa_delete(a);
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if_end_partial_update(i);
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}
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@ -461,40 +463,99 @@ if_get_by_name(char *name)
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return i;
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}
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struct ifa *kif_choose_primary(struct iface *i);
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static int
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ifa_recalc_primary(struct iface *i)
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static inline void
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if_set_preferred(struct ifa **pos, struct ifa *new)
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{
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struct ifa *a = kif_choose_primary(i);
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if (*pos)
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(*pos)->flags &= ~IA_PRIMARY;
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if (new)
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new->flags |= IA_PRIMARY;
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if (a == i->addr)
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return 0;
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*pos = new;
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}
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if (i->addr)
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i->addr->flags &= ~IA_PRIMARY;
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static void
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if_recalc_preferred(struct iface *i)
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{
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/*
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* Preferred address selection priority:
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* 1) Address configured in Device protocol
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* 2) Sysdep IPv4 address (BSD)
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* 3) Old preferred address
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* 4) First address in list
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*/
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if (a)
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struct kif_iface_config *ic = kif_get_iface_config(i);
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struct ifa *a4 = i->addr4, *a6 = i->addr6, *ll = i->llv6;
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ip_addr pref_v4 = ic->pref_v4;
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uint change = 0;
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if (kif_update_sysdep_addr(i))
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change |= IF_CHANGE_SYSDEP;
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/* BSD sysdep address */
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if (ipa_zero(pref_v4) && ip4_nonzero(i->sysdep))
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pref_v4 = ipa_from_ip4(i->sysdep);
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struct ifa *a;
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WALK_LIST(a, i->addrs)
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{
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a->flags |= IA_PRIMARY;
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rem_node(&a->n);
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add_head(&i->addrs, &a->n);
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/* Secondary address is never selected */
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if (a->flags & IA_SECONDARY)
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continue;
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if (ipa_is_ip4(a->ip)) {
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if (!a4 || ipa_equal(a->ip, pref_v4))
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a4 = a;
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} else if (!ipa_is_link_local(a->ip)) {
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if (!a6 || ipa_equal(a->ip, ic->pref_v6))
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a6 = a;
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} else {
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if (!ll || ipa_equal(a->ip, ic->pref_ll))
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ll = a;
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}
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}
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i->addr = a;
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return 1;
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if (a4 != i->addr4)
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{
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if_set_preferred(&i->addr4, a4);
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change |= IF_CHANGE_ADDR4;
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}
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if (a6 != i->addr6)
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{
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if_set_preferred(&i->addr6, a6);
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change |= IF_CHANGE_ADDR6;
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}
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if (ll != i->llv6)
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{
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if_set_preferred(&i->llv6, ll);
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change |= IF_CHANGE_LLV6;
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}
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i->flags &= ~IF_NEEDS_RECALC;
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/*
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* FIXME: There should be proper notification instead of iface restart:
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* if_notify_change(change, i)
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*/
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if (change)
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if_change_flags(i, i->flags | IF_TMP_DOWN);
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}
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void
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ifa_recalc_all_primary_addresses(void)
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if_recalc_all_preferred_addresses(void)
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{
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struct iface *i;
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WALK_LIST(i, iface_list)
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{
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if (ifa_recalc_primary(i))
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if_change_flags(i, i->flags | IF_TMP_DOWN);
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}
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{
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if_recalc_preferred(i);
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if (i->flags & IF_TMP_DOWN)
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if_change_flags(i, i->flags & ~IF_TMP_DOWN);
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}
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}
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static inline int
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@ -526,7 +587,7 @@ ifa_update(struct ifa *a)
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b->scope == a->scope &&
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!((b->flags ^ a->flags) & IA_PEER))
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{
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b->flags |= IF_UPDATED;
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b->flags |= IA_UPDATED;
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return b;
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}
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ifa_delete(b);
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@ -534,15 +595,15 @@ ifa_update(struct ifa *a)
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}
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if ((a->prefix.type == NET_IP4) && (i->flags & IF_BROADCAST) && ipa_zero(a->brd))
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log(L_ERR "Missing broadcast address for interface %s", i->name);
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log(L_WARN "Missing broadcast address for interface %s", i->name);
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b = mb_alloc(if_pool, sizeof(struct ifa));
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memcpy(b, a, sizeof(struct ifa));
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add_tail(&i->addrs, &b->n);
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b->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
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if (ifa_recalc_primary(i))
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if_change_flags(i, i->flags | IF_TMP_DOWN);
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if (b->flags & IF_UP)
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b->flags |= IA_UPDATED;
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i->flags |= IF_NEEDS_RECALC;
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if (i->flags & IF_UP)
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ifa_notify_change(IF_CHANGE_CREATE | IF_CHANGE_UP, b);
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return b;
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}
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@ -565,16 +626,24 @@ ifa_delete(struct ifa *a)
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if (ifa_same(b, a))
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{
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rem_node(&b->n);
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if (b->flags & IF_UP)
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{
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b->flags &= ~IF_UP;
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ifa_notify_change(IF_CHANGE_DOWN, b);
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}
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if (b->flags & IA_PRIMARY)
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{
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if_change_flags(i, i->flags | IF_TMP_DOWN);
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ifa_recalc_primary(i);
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/*
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* We unlink deleted preferred address and mark for recalculation.
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* FIXME: This could break if we make iface scan non-atomic, as
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* protocols still could use the freed address until they get
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* if_notify from preferred route recalculation.
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*/
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if (b == i->addr4) i->addr4 = NULL;
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if (b == i->addr6) i->addr6 = NULL;
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if (b == i->llv6) i->llv6 = NULL;
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i->flags |= IF_NEEDS_RECALC;
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}
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if (i->flags & IF_UP)
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ifa_notify_change(IF_CHANGE_DOWN, b);
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mb_free(b);
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return;
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}
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@ -741,16 +810,17 @@ iface_patts_equal(list *a, list *b, int (*comp)(struct iface_patt *, struct ifac
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static void
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if_show_addr(struct ifa *a)
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{
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byte opp[IPA_MAX_TEXT_LENGTH + 16];
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byte *flg, opp[IPA_MAX_TEXT_LENGTH + 16];
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flg = (a->flags & IA_PRIMARY) ? "Preferred, " : (a->flags & IA_SECONDARY) ? "Secondary, " : "";
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if (ipa_nonzero(a->opposite))
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bsprintf(opp, ", opposite %I", a->opposite);
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bsprintf(opp, "opposite %I, ", a->opposite);
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else
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opp[0] = 0;
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cli_msg(-1003, "\t%I/%d (%s%s, scope %s)",
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a->ip, a->prefix.pxlen,
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(a->flags & IA_PRIMARY) ? "Primary" : (a->flags & IA_SECONDARY) ? "Secondary" : "Unselected",
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opp, ip_scope_text(a->scope));
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cli_msg(-1003, "\t%I/%d (%s%sscope %s)",
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a->ip, a->prefix.pxlen, flg, opp, ip_scope_text(a->scope));
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}
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void
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@ -765,7 +835,7 @@ if_show(void)
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if (i->flags & IF_SHUTDOWN)
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continue;
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cli_msg(-1001, "%s %s (index=%d)", i->name, (i->flags & IF_UP) ? "up" : "DOWN", i->index);
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cli_msg(-1001, "%s %s (index=%d)", i->name, (i->flags & IF_UP) ? "Up" : "Down", i->index);
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if (!(i->flags & IF_MULTIACCESS))
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type = "PtP";
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else
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@ -779,10 +849,13 @@ if_show(void)
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(i->flags & IF_LOOPBACK) ? " Loopback" : "",
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(i->flags & IF_IGNORE) ? " Ignored" : "",
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i->mtu);
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if (i->addr)
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if_show_addr(i->addr);
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WALK_LIST(a, i->addrs)
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if (a != i->addr)
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if (a->prefix.type == NET_IP4)
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if_show_addr(a);
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WALK_LIST(a, i->addrs)
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if (a->prefix.type == NET_IP6)
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if_show_addr(a);
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}
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cli_msg(0, "");
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@ -792,16 +865,25 @@ void
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if_show_summary(void)
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{
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struct iface *i;
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byte addr[IPA_MAX_TEXT_LENGTH + 16];
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cli_msg(-2005, "interface state address");
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cli_msg(-2005, "%-10s %-6s %-18s %s", "Interface", "State", "IPv4 address", "IPv6 address");
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WALK_LIST(i, iface_list)
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{
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if (i->addr)
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bsprintf(addr, "%I/%d", i->addr->ip, i->addr->prefix.pxlen);
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byte a4[IPA_MAX_TEXT_LENGTH + 17];
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byte a6[IPA_MAX_TEXT_LENGTH + 17];
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if (i->addr4)
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bsprintf(a4, "%I/%d", i->addr4->ip, i->addr4->prefix.pxlen);
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else
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addr[0] = 0;
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cli_msg(-1005, "%-9s %-5s %s", i->name, (i->flags & IF_UP) ? "up" : "DOWN", addr);
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a4[0] = 0;
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if (i->addr6)
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bsprintf(a6, "%I/%d", i->addr6->ip, i->addr6->prefix.pxlen);
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else
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a6[0] = 0;
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cli_msg(-1005, "%-10s %-6s %-18s %s",
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i->name, (i->flags & IF_UP) ? "Up" : "Down", a4, a6);
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}
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cli_msg(0, "");
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}
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20
nest/iface.h
20
nest/iface.h
@ -35,11 +35,14 @@ struct iface {
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unsigned mtu;
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unsigned index; /* OS-dependent interface index */
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list addrs; /* Addresses assigned to this interface */
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struct ifa *addr; /* Primary address */
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struct ifa *addr4; /* Primary address for IPv4 */
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struct ifa *addr6; /* Primary address for IPv6 */
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struct ifa *llv6; /* Primary link-local address for IPv6 */
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ip4_addr sysdep; /* Arbitrary IPv4 address for internal sysdep use */
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list neighbors; /* All neighbors on this interface */
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};
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#define IF_UP 1 /* IF_ADMIN_UP and IP address known */
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#define IF_UP 1 /* Currently just IF_ADMIN_UP */
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#define IF_MULTIACCESS 2
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#define IF_BROADCAST 4
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#define IF_MULTICAST 8
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@ -70,7 +73,10 @@ struct iface {
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#define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */
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#define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */
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#define IF_UPDATED 0x40000000 /* Touched in last scan */
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#define IF_UPDATED 0x40000000 /* Iface touched in last scan */
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#define IF_NEEDS_RECALC 0x80000000 /* Preferred address recalculation is needed */
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#define IA_UPDATED IF_UPDATED /* Address touched in last scan */
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/* Interface change events */
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@ -79,8 +85,14 @@ struct iface {
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#define IF_CHANGE_MTU 4
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#define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */
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#define IF_CHANGE_LINK 0x10
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#define IF_CHANGE_ADDR4 0x100 /* Change of iface->addr4 */
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#define IF_CHANGE_ADDR6 0x200 /* ... */
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#define IF_CHANGE_LLV6 0x400
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#define IF_CHANGE_SYSDEP 0x800
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#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
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#define IF_CHANGE_PREFERRED (IF_CHANGE_ADDR4 | IF_CHANGE_ADDR6 | IF_CHANGE_LLV6)
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||||
void if_init(void);
|
||||
void if_dump(struct iface *);
|
||||
void if_dump_all(void);
|
||||
@ -99,7 +111,7 @@ void if_feed_baby(struct proto *);
|
||||
struct iface *if_find_by_index(unsigned);
|
||||
struct iface *if_find_by_name(char *);
|
||||
struct iface *if_get_by_name(char *);
|
||||
void ifa_recalc_all_primary_addresses(void);
|
||||
void if_recalc_all_preferred_addresses(void);
|
||||
|
||||
|
||||
/* The Neighbor Cache */
|
||||
|
||||
@ -33,7 +33,7 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
|
||||
struct channel *c;
|
||||
|
||||
if (!EMPTY_LIST(cf->iface_list) &&
|
||||
!iface_patt_find(&cf->iface_list, ad->iface, ad->iface->addr))
|
||||
!iface_patt_find(&cf->iface_list, ad->iface, ad))
|
||||
/* Empty list is automatically treated as "*" */
|
||||
return;
|
||||
|
||||
|
||||
@ -1501,26 +1501,14 @@ babel_add_iface(struct babel_proto *p, struct iface *new, struct babel_iface_con
|
||||
ifa->cf = ic;
|
||||
ifa->pool = pool;
|
||||
ifa->ifname = new->name;
|
||||
ifa->addr = new->llv6->ip;
|
||||
|
||||
add_tail(&p->interfaces, NODE ifa);
|
||||
|
||||
ip_addr addr4 = IPA_NONE;
|
||||
struct ifa *addr;
|
||||
WALK_LIST(addr, new->addrs)
|
||||
{
|
||||
if (ipa_is_link_local(addr->ip))
|
||||
ifa->addr = addr->ip;
|
||||
|
||||
if (ipa_zero(addr4) && ipa_is_ip4(addr->ip))
|
||||
addr4 = addr->ip;
|
||||
}
|
||||
|
||||
ip_addr addr4 = new->addr4 ? new->addr4->ip : IPA_NONE;
|
||||
ifa->next_hop_ip4 = ipa_nonzero(ic->next_hop_ip4) ? ic->next_hop_ip4 : addr4;
|
||||
ifa->next_hop_ip6 = ipa_nonzero(ic->next_hop_ip6) ? ic->next_hop_ip6 : ifa->addr;
|
||||
|
||||
if (ipa_zero(ifa->addr))
|
||||
log(L_WARN "%s: Cannot find link-local addr on %s", p->p.name, new->name);
|
||||
|
||||
if (ipa_zero(ifa->next_hop_ip4) && p->ip4_channel)
|
||||
log(L_WARN "%s: Cannot find IPv4 next hop addr on %s", p->p.name, new->name);
|
||||
|
||||
@ -1576,6 +1564,10 @@ babel_if_notify(struct proto *P, unsigned flags, struct iface *iface)
|
||||
if (!(iface->flags & IF_MULTICAST))
|
||||
return;
|
||||
|
||||
/* Ignore ifaces without link-local address */
|
||||
if (!iface->llv6)
|
||||
return;
|
||||
|
||||
if (ic)
|
||||
babel_add_iface(p, iface, ic);
|
||||
|
||||
@ -1615,21 +1607,8 @@ babel_reconfigure_iface(struct babel_proto *p, struct babel_iface *ifa, struct b
|
||||
|
||||
ifa->cf = new;
|
||||
|
||||
if (ipa_nonzero(new->next_hop_ip4))
|
||||
ifa->next_hop_ip4 = new->next_hop_ip4;
|
||||
else
|
||||
{
|
||||
ifa->next_hop_ip4 = IPA_NONE;
|
||||
|
||||
struct ifa *addr;
|
||||
WALK_LIST(addr, ifa->iface->addrs)
|
||||
if (ipa_is_ip4(addr->ip))
|
||||
{
|
||||
ifa->next_hop_ip4 = addr->ip;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
ip_addr addr4 = ifa->iface->addr4 ? ifa->iface->addr4->ip : IPA_NONE;
|
||||
ifa->next_hop_ip4 = ipa_nonzero(new->next_hop_ip4) ? new->next_hop_ip4 : addr4;
|
||||
ifa->next_hop_ip6 = ipa_nonzero(new->next_hop_ip6) ? new->next_hop_ip6 : ifa->addr;
|
||||
|
||||
if (ipa_zero(ifa->next_hop_ip4) && p->ip4_channel)
|
||||
@ -1660,7 +1639,15 @@ babel_reconfigure_ifaces(struct babel_proto *p, struct babel_config *cf)
|
||||
|
||||
WALK_LIST(iface, iface_list)
|
||||
{
|
||||
if (! (iface->flags & IF_UP))
|
||||
if (!(iface->flags & IF_UP))
|
||||
continue;
|
||||
|
||||
/* Ignore non-multicast ifaces */
|
||||
if (!(iface->flags & IF_MULTICAST))
|
||||
continue;
|
||||
|
||||
/* Ignore ifaces without link-local address */
|
||||
if (!iface->llv6)
|
||||
continue;
|
||||
|
||||
struct babel_iface *ifa = babel_find_iface(p, iface);
|
||||
|
||||
@ -1294,7 +1294,7 @@ babel_rx_hook(sock *sk, uint len)
|
||||
sk->iface->name, sk->faddr, sk->laddr);
|
||||
|
||||
/* Silently ignore my own packets */
|
||||
if (ipa_equal(ifa->iface->addr->ip, sk->faddr))
|
||||
if (ipa_equal(sk->faddr, sk->saddr))
|
||||
return 1;
|
||||
|
||||
if (!ipa_is_link_local(sk->faddr))
|
||||
@ -1329,6 +1329,7 @@ babel_open_socket(struct babel_iface *ifa)
|
||||
sk->sport = ifa->cf->port;
|
||||
sk->dport = ifa->cf->port;
|
||||
sk->iface = ifa->iface;
|
||||
sk->saddr = ifa->addr;
|
||||
|
||||
sk->rx_hook = babel_rx_hook;
|
||||
sk->tx_hook = babel_tx_hook;
|
||||
|
||||
@ -1094,19 +1094,8 @@ bgp_start_neighbor(struct bgp_proto *p)
|
||||
|
||||
if (ipa_is_link_local(p->source_addr))
|
||||
p->link_addr = p->source_addr;
|
||||
else
|
||||
{
|
||||
/* Find some link-local address for given iface */
|
||||
struct ifa *a;
|
||||
WALK_LIST(a, p->neigh->iface->addrs)
|
||||
if (a->scope == SCOPE_LINK)
|
||||
{
|
||||
p->link_addr = a->ip;
|
||||
break;
|
||||
}
|
||||
|
||||
DBG("%s: Selected link-local address %I\n", p->p.name, p->link_addr);
|
||||
}
|
||||
else if (p->neigh->iface->llv6)
|
||||
p->link_addr = p->neigh->iface->llv6->ip;
|
||||
|
||||
bgp_initiate(p);
|
||||
}
|
||||
|
||||
@ -358,7 +358,7 @@ radv_rx_hook(sock *sk, uint size)
|
||||
if (sk->lifindex != sk->iface->index)
|
||||
return 1;
|
||||
|
||||
if (ipa_equal(sk->faddr, ifa->addr->ip))
|
||||
if (ipa_equal(sk->faddr, sk->saddr))
|
||||
return 1;
|
||||
|
||||
if (size < 8)
|
||||
|
||||
@ -138,17 +138,6 @@ radv_iface_add(struct object_lock *lock)
|
||||
radv_iface_notify(ifa, RA_EV_INIT);
|
||||
}
|
||||
|
||||
static inline struct ifa *
|
||||
find_lladdr(struct iface *iface)
|
||||
{
|
||||
struct ifa *a;
|
||||
WALK_LIST(a, iface->addrs)
|
||||
if ((a->prefix.type == NET_IP6) && (a->scope == SCOPE_LINK))
|
||||
return a;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
radv_iface_new(struct radv_proto *p, struct iface *iface, struct radv_iface_config *cf)
|
||||
{
|
||||
@ -161,16 +150,10 @@ radv_iface_new(struct radv_proto *p, struct iface *iface, struct radv_iface_conf
|
||||
ifa->ra = p;
|
||||
ifa->cf = cf;
|
||||
ifa->iface = iface;
|
||||
ifa->addr = iface->llv6;
|
||||
|
||||
add_tail(&p->iface_list, NODE ifa);
|
||||
|
||||
ifa->addr = find_lladdr(iface);
|
||||
if (!ifa->addr)
|
||||
{
|
||||
log(L_ERR "%s: Missing link-local address on interface %s", p->p.name, iface->name);
|
||||
return;
|
||||
}
|
||||
|
||||
timer *tm = tm_new(pool);
|
||||
tm->hook = radv_timer;
|
||||
tm->data = ifa;
|
||||
@ -216,8 +199,15 @@ radv_if_notify(struct proto *P, unsigned flags, struct iface *iface)
|
||||
|
||||
if (flags & IF_CHANGE_UP)
|
||||
{
|
||||
struct radv_iface_config *ic = (struct radv_iface_config *)
|
||||
iface_patt_find(&cf->patt_list, iface, NULL);
|
||||
struct radv_iface_config *ic = (void *) iface_patt_find(&cf->patt_list, iface, NULL);
|
||||
|
||||
/* Ignore non-multicast ifaces */
|
||||
if (!(iface->flags & IF_MULTICAST))
|
||||
return;
|
||||
|
||||
/* Ignore ifaces without link-local address */
|
||||
if (!iface->llv6)
|
||||
return;
|
||||
|
||||
if (ic)
|
||||
radv_iface_new(p, iface, ic);
|
||||
@ -395,6 +385,17 @@ radv_reconfigure(struct proto *P, struct proto_config *CF)
|
||||
struct iface *iface;
|
||||
WALK_LIST(iface, iface_list)
|
||||
{
|
||||
if (!(iface->flags & IF_UP))
|
||||
continue;
|
||||
|
||||
/* Ignore non-multicast ifaces */
|
||||
if (!(iface->flags & IF_MULTICAST))
|
||||
continue;
|
||||
|
||||
/* Ignore ifaces without link-local address */
|
||||
if (!iface->llv6)
|
||||
continue;
|
||||
|
||||
struct radv_iface *ifa = radv_iface_find(p, iface);
|
||||
struct radv_iface_config *ic = (struct radv_iface_config *)
|
||||
iface_patt_find(&new->patt_list, iface, NULL);
|
||||
|
||||
@ -669,8 +669,7 @@ rip_rx_hook(sock *sk, uint len)
|
||||
sk->iface->name, sk->faddr, sk->laddr);
|
||||
|
||||
/* Silently ignore my own packets */
|
||||
/* FIXME: Better local address check */
|
||||
if (ipa_equal(ifa->iface->addr->ip, sk->faddr))
|
||||
if (ipa_equal(sk->faddr, sk->saddr))
|
||||
return 1;
|
||||
|
||||
if (rip_is_ng(p) && !ipa_is_link_local(sk->faddr))
|
||||
@ -742,14 +741,7 @@ rip_open_socket(struct rip_iface *ifa)
|
||||
sk->sport = ifa->cf->port;
|
||||
sk->dport = ifa->cf->port;
|
||||
sk->iface = ifa->iface;
|
||||
|
||||
/*
|
||||
* For RIPv2, we explicitly choose a primary address, mainly to ensure that
|
||||
* RIP and BFD uses the same one. For RIPng, we left it to kernel, which
|
||||
* should choose some link-local address based on the same scope rule.
|
||||
*/
|
||||
if (rip_is_v2(p))
|
||||
sk->saddr = ifa->iface->addr->ip;
|
||||
sk->saddr = rip_is_v2(p) ? ifa->iface->addr4->ip : ifa->iface->llv6->ip;
|
||||
|
||||
sk->rx_hook = rip_rx_hook;
|
||||
sk->tx_hook = rip_tx_hook;
|
||||
|
||||
@ -630,7 +630,13 @@ rip_add_iface(struct rip_proto *p, struct iface *iface, struct rip_iface_config
|
||||
else if (ic->mode == RIP_IM_MULTICAST)
|
||||
ifa->addr = rip_is_v2(p) ? IP4_RIP_ROUTERS : IP6_RIP_ROUTERS;
|
||||
else /* Broadcast */
|
||||
ifa->addr = iface->addr->brd;
|
||||
ifa->addr = iface->addr4->brd;
|
||||
/*
|
||||
* The above is just a workaround for BSD as it can't send broadcasts
|
||||
* to 255.255.255.255. BSD systems need the network broadcast address instead.
|
||||
*
|
||||
* TODO: move this to sysdep code
|
||||
*/
|
||||
|
||||
init_list(&ifa->neigh_list);
|
||||
|
||||
@ -706,7 +712,11 @@ rip_reconfigure_ifaces(struct rip_proto *p, struct rip_config *cf)
|
||||
|
||||
WALK_LIST(iface, iface_list)
|
||||
{
|
||||
if (! (iface->flags & IF_UP))
|
||||
if (!(iface->flags & IF_UP))
|
||||
continue;
|
||||
|
||||
/* Ignore ifaces without appropriate address */
|
||||
if (rip_is_v2(p) ? !iface->addr4 : !iface->llv6)
|
||||
continue;
|
||||
|
||||
struct rip_iface *ifa = rip_find_iface(p, iface);
|
||||
@ -744,6 +754,10 @@ rip_if_notify(struct proto *P, unsigned flags, struct iface *iface)
|
||||
{
|
||||
struct rip_iface_config *ic = (void *) iface_patt_find(&cf->patt_list, iface, NULL);
|
||||
|
||||
/* Ignore ifaces without appropriate address */
|
||||
if (rip_is_v2(p) ? !iface->addr4 : !iface->llv6)
|
||||
return;
|
||||
|
||||
if (ic)
|
||||
rip_add_iface(p, iface, ic);
|
||||
|
||||
|
||||
@ -287,18 +287,21 @@ krt_send_route(struct krt_proto *p, int cmd, rte *e)
|
||||
#endif
|
||||
{
|
||||
/* Fallback for all other valid cases */
|
||||
if (!i->addr)
|
||||
{
|
||||
log(L_ERR "KRT: interface %s has no IP addess", i->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
#ifdef RTF_CLONING
|
||||
if (cmd == RTM_ADD && (i->flags & IF_MULTIACCESS) != IF_MULTIACCESS) /* PTP */
|
||||
msg.rtm.rtm_flags |= RTF_CLONING;
|
||||
#endif
|
||||
|
||||
sockaddr_fill(&gate, ipa_is_ip4(i->addr->ip) ? AF_INET : AF_INET6, i->addr->ip, NULL, 0);
|
||||
struct ifa *addr = (net->n.addr->type == NET_IP4) ? i->addr4 : (i->addr6 ?: i->llv6);
|
||||
|
||||
if (!addr)
|
||||
{
|
||||
log(L_ERR "KRT: interface %s has no IP addess", i->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
sockaddr_fill(&gate, af, addr->ip, i, 0);
|
||||
msg.rtm.rtm_addrs |= RTA_GATEWAY;
|
||||
break;
|
||||
}
|
||||
@ -1124,13 +1127,11 @@ kif_sys_shutdown(struct kif_proto *p)
|
||||
krt_buffer_release(&p->p);
|
||||
}
|
||||
|
||||
|
||||
struct ifa *
|
||||
kif_get_primary_ip(struct iface *i UNUSED)
|
||||
int
|
||||
kif_update_sysdep_addr(struct iface *i)
|
||||
{
|
||||
#if 0
|
||||
static int fd = -1;
|
||||
|
||||
|
||||
if (fd < 0)
|
||||
fd = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
|
||||
@ -1140,20 +1141,10 @@ kif_get_primary_ip(struct iface *i UNUSED)
|
||||
|
||||
int rv = ioctl(fd, SIOCGIFADDR, (char *) &ifr);
|
||||
if (rv < 0)
|
||||
return NULL;
|
||||
return 0;
|
||||
|
||||
ip_addr addr;
|
||||
struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
|
||||
memcpy(&addr, &sin->sin_addr.s_addr, sizeof(ip_addr));
|
||||
ipa_ntoh(addr);
|
||||
ip4_addr old = i->sysdep;
|
||||
i->sysdep = ip4_from_ipa(ipa_from_sa4(&ifr.ifr_addr);
|
||||
|
||||
struct ifa *a;
|
||||
WALK_LIST(a, i->addrs)
|
||||
{
|
||||
if (ipa_equal(a->ip, addr))
|
||||
return a;
|
||||
}
|
||||
#endif
|
||||
|
||||
return NULL;
|
||||
return !ip4_equal(i->sysdep, addr);
|
||||
}
|
||||
|
||||
@ -38,12 +38,12 @@
|
||||
*/
|
||||
|
||||
#define INIT_MREQ4(maddr,ifa) \
|
||||
{ .imr_multiaddr = ipa_to_in4(maddr), .imr_interface = ipa_to_in4(ifa->addr->ip) }
|
||||
{ .imr_multiaddr = ipa_to_in4(maddr), .imr_interface = ip4_to_in4(ifa->sysdep) }
|
||||
|
||||
static inline int
|
||||
sk_setup_multicast4(sock *s)
|
||||
{
|
||||
struct in_addr ifa = ipa_to_in4(s->iface->addr->ip);
|
||||
struct in_addr ifa = ip4_to_in4(s->iface->sysdep);
|
||||
u8 ttl = s->ttl;
|
||||
u8 n = 0;
|
||||
|
||||
|
||||
@ -2030,3 +2030,9 @@ void
|
||||
kif_sys_shutdown(struct kif_proto *p UNUSED)
|
||||
{
|
||||
}
|
||||
|
||||
int
|
||||
kif_update_sysdep_addr(struct iface *i UNUSED)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -14,6 +14,7 @@ CF_DEFINES
|
||||
|
||||
#define THIS_KRT ((struct krt_config *) this_proto)
|
||||
#define THIS_KIF ((struct kif_config *) this_proto)
|
||||
#define KIF_IFACE ((struct kif_iface_config *) this_ipatt)
|
||||
|
||||
static void
|
||||
krt_set_merge_paths(struct channel_config *cc, uint merge, uint limit)
|
||||
@ -25,6 +26,17 @@ krt_set_merge_paths(struct channel_config *cc, uint merge, uint limit)
|
||||
cc->merge_limit = limit;
|
||||
}
|
||||
|
||||
static void
|
||||
kif_set_preferred(ip_addr ip)
|
||||
{
|
||||
if (ipa_is_ip4(ip))
|
||||
KIF_IFACE->pref_v4 = ip;
|
||||
else if (!ipa_is_link_local(ip))
|
||||
KIF_IFACE->pref_v6 = ip;
|
||||
else
|
||||
KIF_IFACE->pref_ll = ip;
|
||||
}
|
||||
|
||||
CF_DECLS
|
||||
|
||||
CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, GRACEFUL, RESTART, KRT_SOURCE, KRT_METRIC, MERGE, PATHS)
|
||||
@ -88,18 +100,38 @@ CF_ADDTO(kif_proto, kif_proto kif_item ';')
|
||||
|
||||
kif_item:
|
||||
proto_item
|
||||
| INTERFACE kif_iface
|
||||
| SCAN TIME expr {
|
||||
/* Scan time of 0 means scan on startup only */
|
||||
THIS_KIF->scan_time = $3;
|
||||
}
|
||||
| PRIMARY opttext net_or_ipa {
|
||||
struct kif_primary_item *kpi = cfg_alloc(sizeof (struct kif_primary_item));
|
||||
kpi->pattern = $2;
|
||||
kpi->addr = $3;
|
||||
add_tail(&THIS_KIF->primary, &kpi->n);
|
||||
}
|
||||
;
|
||||
|
||||
kif_iface_start:
|
||||
{
|
||||
this_ipatt = cfg_allocz(sizeof(struct kif_iface_config));
|
||||
add_tail(&THIS_KIF->iface_list, NODE this_ipatt);
|
||||
init_list(&this_ipatt->ipn_list);
|
||||
}
|
||||
|
||||
kif_iface_item:
|
||||
PREFERRED ipa { kif_set_preferred($2); }
|
||||
;
|
||||
|
||||
kif_iface_opts:
|
||||
/* empty */
|
||||
| kif_iface_opts kif_iface_item ';'
|
||||
;
|
||||
|
||||
kif_iface_opt_list:
|
||||
/* empty */
|
||||
| '{' kif_iface_opts '}'
|
||||
;
|
||||
|
||||
kif_iface:
|
||||
kif_iface_start iface_patt_list_nopx kif_iface_opt_list;
|
||||
|
||||
|
||||
CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_SOURCE); })
|
||||
CF_ADDTO(dynamic_attr, KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEMP, T_INT, EA_KRT_METRIC); })
|
||||
|
||||
|
||||
@ -89,6 +89,16 @@ static struct kif_config *kif_cf;
|
||||
static timer *kif_scan_timer;
|
||||
static bird_clock_t kif_last_shot;
|
||||
|
||||
static struct kif_iface_config kif_default_iface = {};
|
||||
|
||||
struct kif_iface_config *
|
||||
kif_get_iface_config(struct iface *iface)
|
||||
{
|
||||
struct kif_config *cf = (void *) (kif_proto->p.cf);
|
||||
struct kif_iface_config *ic = (void *) iface_patt_find(&cf->iface_list, iface, NULL);
|
||||
return ic ?: &kif_default_iface;
|
||||
}
|
||||
|
||||
static void
|
||||
kif_scan(timer *t)
|
||||
{
|
||||
@ -116,57 +126,6 @@ kif_request_scan(void)
|
||||
tm_start(kif_scan_timer, 1);
|
||||
}
|
||||
|
||||
static inline int
|
||||
prefer_addr(struct ifa *a, struct ifa *b)
|
||||
{
|
||||
int sa = a->scope > SCOPE_LINK;
|
||||
int sb = b->scope > SCOPE_LINK;
|
||||
|
||||
if (sa < sb)
|
||||
return 0;
|
||||
else if (sa > sb)
|
||||
return 1;
|
||||
else
|
||||
return ipa_compare(a->ip, b->ip) < 0;
|
||||
}
|
||||
|
||||
static inline struct ifa *
|
||||
find_preferred_ifa(struct iface *i, const net_addr *n)
|
||||
{
|
||||
struct ifa *a, *b = NULL;
|
||||
|
||||
WALK_LIST(a, i->addrs)
|
||||
{
|
||||
if (!(a->flags & IA_SECONDARY) &&
|
||||
(!n || ipa_in_netX(a->ip, n)) &&
|
||||
(!b || prefer_addr(a, b)))
|
||||
b = a;
|
||||
}
|
||||
|
||||
return b;
|
||||
}
|
||||
|
||||
struct ifa *
|
||||
kif_choose_primary(struct iface *i)
|
||||
{
|
||||
struct kif_config *cf = (struct kif_config *) (kif_proto->p.cf);
|
||||
struct kif_primary_item *it;
|
||||
struct ifa *a;
|
||||
|
||||
WALK_LIST(it, cf->primary)
|
||||
{
|
||||
if (!it->pattern || patmatch(it->pattern, i->name))
|
||||
if (a = find_preferred_ifa(i, &it->addr))
|
||||
return a;
|
||||
}
|
||||
|
||||
if (a = kif_get_primary_ip(i))
|
||||
return a;
|
||||
|
||||
return find_preferred_ifa(i, NULL);
|
||||
}
|
||||
|
||||
|
||||
static struct proto *
|
||||
kif_init(struct proto_config *c)
|
||||
{
|
||||
@ -224,15 +183,15 @@ kif_reconfigure(struct proto *p, struct proto_config *new)
|
||||
tm_start(kif_scan_timer, n->scan_time);
|
||||
}
|
||||
|
||||
if (!EMPTY_LIST(o->primary) || !EMPTY_LIST(n->primary))
|
||||
if (!EMPTY_LIST(o->iface_list) || !EMPTY_LIST(n->iface_list))
|
||||
{
|
||||
/* This is hack, we have to update a configuration
|
||||
* to the new value just now, because it is used
|
||||
* for recalculation of primary addresses.
|
||||
* for recalculation of preferred addresses.
|
||||
*/
|
||||
p->cf = new;
|
||||
|
||||
ifa_recalc_all_primary_addresses();
|
||||
if_recalc_all_preferred_addresses();
|
||||
}
|
||||
|
||||
return 1;
|
||||
@ -254,7 +213,7 @@ kif_init_config(int class)
|
||||
|
||||
kif_cf = (struct kif_config *) proto_config_new(&proto_unix_iface, class);
|
||||
kif_cf->scan_time = 60;
|
||||
init_list(&kif_cf->primary);
|
||||
init_list(&kif_cf->iface_list);
|
||||
|
||||
kif_sys_init_config(kif_cf);
|
||||
return (struct proto_config *) kif_cf;
|
||||
@ -266,14 +225,13 @@ kif_copy_config(struct proto_config *dest, struct proto_config *src)
|
||||
struct kif_config *d = (struct kif_config *) dest;
|
||||
struct kif_config *s = (struct kif_config *) src;
|
||||
|
||||
/* Copy primary addr list */
|
||||
cfg_copy_list(&d->primary, &s->primary, sizeof(struct kif_primary_item));
|
||||
/* Copy interface config list */
|
||||
cfg_copy_list(&d->iface_list, &s->iface_list, sizeof(struct kif_iface_config));
|
||||
|
||||
/* Fix sysdep parts */
|
||||
kif_sys_copy_config(d, s);
|
||||
}
|
||||
|
||||
|
||||
struct protocol proto_unix_iface = {
|
||||
.name = "Device",
|
||||
.template = "device%d",
|
||||
|
||||
@ -94,17 +94,20 @@ void krt_got_route_async(struct krt_proto *p, struct rte *e, int new);
|
||||
|
||||
extern struct protocol proto_unix_iface;
|
||||
|
||||
struct kif_primary_item {
|
||||
node n;
|
||||
byte *pattern;
|
||||
net_addr addr;
|
||||
};
|
||||
|
||||
struct kif_config {
|
||||
struct proto_config c;
|
||||
struct kif_params sys; /* Sysdep params */
|
||||
|
||||
list iface_list; /* List of iface configs (struct kif_iface_config) */
|
||||
int scan_time; /* How often we re-scan interfaces */
|
||||
list primary; /* Preferences for primary addresses (struct kif_primary_item) */
|
||||
};
|
||||
|
||||
struct kif_iface_config {
|
||||
struct iface_patt i;
|
||||
|
||||
ip_addr pref_v4;
|
||||
ip_addr pref_v6;
|
||||
ip_addr pref_ll;
|
||||
};
|
||||
|
||||
struct kif_proto {
|
||||
@ -116,6 +119,7 @@ extern struct kif_proto *kif_proto;
|
||||
|
||||
#define KIF_CF ((struct kif_config *)p->p.cf)
|
||||
|
||||
struct kif_iface_config * kif_get_iface_config(struct iface *iface);
|
||||
struct proto_config * krt_init_config(int class);
|
||||
|
||||
|
||||
@ -150,6 +154,6 @@ void kif_sys_copy_config(struct kif_config *, struct kif_config *);
|
||||
|
||||
void kif_do_scan(struct kif_proto *);
|
||||
|
||||
struct ifa *kif_get_primary_ip(struct iface *i);
|
||||
int kif_update_sysdep_addr(struct iface *i);
|
||||
|
||||
#endif
|
||||
|
||||
@ -80,6 +80,9 @@ static inline ip_addr ipa_from_sa(sockaddr *sa)
|
||||
static inline struct in_addr ipa_to_in4(ip_addr a)
|
||||
{ return (struct in_addr) { htonl(ipa_to_u32(a)) }; }
|
||||
|
||||
static inline struct in_addr ip4_to_in4(ip4_addr a)
|
||||
{ return (struct in_addr) { htonl(ip4_to_u32(a)) }; }
|
||||
|
||||
static inline struct in6_addr ipa_to_in6(ip_addr a)
|
||||
{ return (struct in6_addr) { .s6_addr32 = { htonl(_I0(a)), htonl(_I1(a)), htonl(_I2(a)), htonl(_I3(a)) } }; }
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user