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Netlink support for secondary interface addresses.

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This commit is contained in:
Martin Mares 1999-05-07 13:46:16 +00:00
parent 9a158361da
commit a2697f02ac
3 changed files with 34 additions and 35 deletions
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1
TODO
View file

@ -26,6 +26,7 @@ Core
- iface: when seen an invalid broadcast, fix it up or at least report
- iface: we always need ifindex at least for PtP links (OSPF)
- iface: interface filters should support filtering by IP address as well
- iface: SIOCGIFINDEX exists on glibc systems, but it doesn't work on 2.0.x kernels!
- socket: Use IP_RECVERR for BGP TCP sockets?

8
nest/iface.c
View file

@ -361,8 +361,9 @@ if_update(struct iface *new)
DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
if_change_flags(i, i->flags | IF_TMP_DOWN);
rem_node(&i->n);
WALK_LIST_DELSAFE(a, b, i->addrs)
ifa_delete(a);
new->addr = i->addr;
memcpy(&new->addrs, &i->addrs, sizeof(i->addrs));
memcpy(i, new, sizeof(*i));
goto newif;
}
else if (c)
@ -374,9 +375,9 @@ if_update(struct iface *new)
return i;
}
i = mb_alloc(if_pool, sizeof(struct iface));
newif:
memcpy(i, new, sizeof(*i));
init_list(&i->addrs);
newif:
i->flags |= IF_UPDATED | IF_TMP_DOWN; /* Tmp down as we don't have addresses yet */
add_tail(&iface_list, &i->n);
return i;
@ -543,6 +544,7 @@ ifa_delete(struct ifa *a)
ifa_recalc_primary(i);
}
mb_free(b);
return;
}
}

60
sysdep/linux/netlink/netlink.c
View file

@ -316,7 +316,7 @@ nl_parse_addr(struct nlmsghdr *h)
struct ifaddrmsg *i;
struct rtattr *a[IFA_ANYCAST+1];
int new = h->nlmsg_type == RTM_NEWADDR;
struct iface f;
struct ifa ifa;
struct iface *ifi;
if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(IFA_RTA(i), a, sizeof(a)))
@ -330,11 +330,6 @@ nl_parse_addr(struct nlmsghdr *h)
log(L_ERR "nl_parse_addr: Malformed message received");
return;
}
if (i->ifa_flags & IFA_F_SECONDARY)
{
DBG("KIF: Received address message for secondary address which is not supported.\n"); /* FIXME */
return;
}
ifi = if_find_by_index(i->ifa_index);
if (!ifi)
@ -342,41 +337,42 @@ nl_parse_addr(struct nlmsghdr *h)
log(L_ERR "KIF: Received address message for unknown interface %d\n", i->ifa_index);
return;
}
memcpy(&f, ifi, sizeof(f));
if (i->ifa_prefixlen > 32 || i->ifa_prefixlen == 31 ||
(f.flags & IF_UNNUMBERED) && i->ifa_prefixlen != 32)
(ifi->flags & IF_UNNUMBERED) && i->ifa_prefixlen != 32)
{
log(L_ERR "KIF: Invalid prefix length for interface %s: %d\n", f.name, i->ifa_prefixlen);
log(L_ERR "KIF: Invalid prefix length for interface %s: %d\n", ifi->name, i->ifa_prefixlen);
new = 0;
}
f.ip = f.brd = f.opposite = IPA_NONE;
if (!new)
bzero(&ifa, sizeof(ifa));
ifa.iface = ifi;
if (i->ifa_flags & IFA_F_SECONDARY)
ifa.flags |= IA_SECONDARY;
memcpy(&ifa.ip, RTA_DATA(a[IFA_LOCAL]), sizeof(ifa.ip));
ifa.ip = ipa_ntoh(ifa.ip);
ifa.pxlen = i->ifa_prefixlen;
if (ifi->flags & IF_UNNUMBERED)
{
DBG("KIF: IF%d IP address deleted\n");
f.pxlen = 0;
memcpy(&ifa.opposite, RTA_DATA(a[IFA_ADDRESS]), sizeof(ifa.opposite));
ifa.opposite = ifa.brd = ipa_ntoh(ifa.opposite);
}
else if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
{
memcpy(&ifa.brd, RTA_DATA(a[IFA_BROADCAST]), sizeof(ifa.brd));
ifa.brd = ipa_ntoh(ifa.brd);
}
/* else a NBMA link */
ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(ifa.pxlen));
DBG("KIF: IF%d(%s): %s IPA %I, net %I/%d, brd %I, opp %I\n",
ifi->index, ifi->name,
new ? "added" : "removed",
ifa.ip, ifa.prefix, ifa.pxlen, ifa.brd, ifa.opposite);
if (new)
ifa_update(&ifa);
else
{
memcpy(&f.ip, RTA_DATA(a[IFA_LOCAL]), sizeof(f.ip));
f.ip = ipa_ntoh(f.ip);
f.pxlen = i->ifa_prefixlen;
if (f.flags & IF_UNNUMBERED)
{
memcpy(&f.opposite, RTA_DATA(a[IFA_ADDRESS]), sizeof(f.opposite));
f.opposite = f.brd = ipa_ntoh(f.opposite);
}
else if ((f.flags & IF_BROADCAST) && a[IFA_BROADCAST])
{
memcpy(&f.brd, RTA_DATA(a[IFA_BROADCAST]), sizeof(f.brd));
f.brd = ipa_ntoh(f.brd);
}
/* else a NBMA link */
f.prefix = ipa_and(f.ip, ipa_mkmask(f.pxlen));
DBG("KIF: IF%d IP address set to %I, net %I/%d, brd %I, opp %I\n", f.index, f.ip, f.prefix, f.pxlen, f.brd, f.opposite);
}
if_update(&f);
ifa_delete(&ifa);
}
void