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Don't try to manipulate neighbor lists for copied interface structures.

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This avoids few nasty references to free memory.
This commit is contained in:
Martin Mares 1999-03-26 21:33:36 +00:00
parent f79a749d0b
commit b5239f2238
1 changed files with 12 additions and 9 deletions
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21
nest/iface.c
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@ -144,7 +144,7 @@ neigh_if_down(struct iface *i)
for(m=i->neigh; n = m;) for(m=i->neigh; n = m;)
{ {
m = n->sibling; m = n->sibling;
DBG("Flushing neighbor %I on %s\n", n->addr, n->iface->name); DBG("Flushing neighbor %I on %s\n", n->addr, i->name);
n->iface = NULL; n->iface = NULL;
if (n->proto->neigh_notify && n->proto->core_state != FS_FLUSHING) if (n->proto->neigh_notify && n->proto->core_state != FS_FLUSHING)
n->proto->neigh_notify(n); n->proto->neigh_notify(n);
@ -153,8 +153,8 @@ neigh_if_down(struct iface *i)
rem_node(&n->n); rem_node(&n->n);
sl_free(neigh_slab, n); sl_free(neigh_slab, n);
} }
i->neigh = NULL;
} }
i->neigh = NULL;
} }
void void
@ -248,6 +248,7 @@ if_copy(struct iface *to, struct iface *from)
to->flags = from->flags; to->flags = from->flags;
to->mtu = from->mtu; to->mtu = from->mtu;
to->index = from->index; to->index = from->index;
to->neigh = from->neigh;
} }
static unsigned static unsigned
@ -270,7 +271,7 @@ if_changed(struct iface *i, struct iface *j)
} }
static void static void
if_notify_change(unsigned c, struct iface *old, struct iface *new) if_notify_change(unsigned c, struct iface *old, struct iface *new, struct iface *real)
{ {
struct proto *p; struct proto *p;
@ -281,14 +282,14 @@ if_notify_change(unsigned c, struct iface *old, struct iface *new)
if_dump(new); if_dump(new);
if (c & IF_CHANGE_UP) if (c & IF_CHANGE_UP)
neigh_if_up(new); neigh_if_up(real);
WALK_LIST(p, proto_list) WALK_LIST(p, proto_list)
if (p->if_notify) if (p->if_notify)
p->if_notify(p, c, new, old); p->if_notify(p, c, new, old);
if (c & IF_CHANGE_DOWN) if (c & IF_CHANGE_DOWN)
neigh_if_down(old); neigh_if_down(real);
} }
void void
@ -310,15 +311,17 @@ if_update(struct iface *new)
DBG("Interface %s changed too much -- forcing down/up transition\n", i->name); DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
if (i->flags & IF_UP) if (i->flags & IF_UP)
{ {
struct iface j;
memcpy(&j, i, sizeof(struct iface));
i->flags &= ~IF_UP; i->flags &= ~IF_UP;
if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, i, NULL); if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i, i);
} }
rem_node(&i->n); rem_node(&i->n);
goto newif; goto newif;
} }
c = if_changed(i, new); c = if_changed(i, new);
if (c) if (c)
if_notify_change(c, i, new); if_notify_change(c, i, new, i);
if_copy(i, new); /* Even if c==0 as we might need to update i->index et al. */ if_copy(i, new); /* Even if c==0 as we might need to update i->index et al. */
i->flags |= IF_UPDATED; i->flags |= IF_UPDATED;
return; return;
@ -330,7 +333,7 @@ newif:
i->flags |= IF_UPDATED; i->flags |= IF_UPDATED;
add_tail(&iface_list, &i->n); add_tail(&iface_list, &i->n);
if_notify_change(IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0) if_notify_change(IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0)
| IF_CHANGE_FLAGS | IF_CHANGE_MTU, NULL, i); | IF_CHANGE_FLAGS | IF_CHANGE_MTU, NULL, i, i);
} }
void void
@ -356,7 +359,7 @@ if_end_update(void)
memcpy(&j, i, sizeof(struct iface)); memcpy(&j, i, sizeof(struct iface));
i->flags = (i->flags & ~(IF_LINK_UP | IF_UP)) | IF_ADMIN_DOWN; i->flags = (i->flags & ~(IF_LINK_UP | IF_UP)) | IF_ADMIN_DOWN;
if (i->flags != j.flags) if (i->flags != j.flags)
if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i); if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i, i);
} }
} }