[PtP over ethernet] New peer flag allows much more addressing flexibility
2006-12-12 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* if.h: (struct connected) Add new ZEBRA_IFA_PEER flag indicating
whether a peer address has been configured. Comment now shows
the new interpretation of the destination addr: if ZEBRA_IFA_PEER
is set, then it must contain the destination address, otherwise
it may contain the broadcast address or be NULL.
(CONNECTED_DEST_HOST,CONNECTED_POINTOPOINT_HOST) Remove obsolete
macros that were specific to IPv4 and not fully general.
(CONNECTED_PEER) New macro to check ZEBRA_IFA_PEER flag.
(CONNECTED_PREFIX) New macro giving the prefix to insert into
the RIB: if CONNECTED_PEER, then use the destination (peer) address,
else use the address field.
(CONNECTED_ID) New macro to come up with an identifying address
for the struct connected.
* if.c: (if_lookup_address, connected_lookup_address) Streamline
logic with new CONNECTED_PREFIX macro.
* prefix.h: (PREFIX_COPY_IPV4, PREFIX_COPY_IPV6) New macros
for better performance than the general prefix_copy function.
* zclient.c: (zebra_interface_address_read) For non-null destination
addresses, set prefixlen to equal the address prefixlen. This
is needed to get the new CONNECTED_PREFIX macro to work properly.
* connected.c: (connected_up_ipv4, connected_down_ipv4,
connected_up_ipv6, connected_down_ipv6) Simplify logic using the
new CONNECTED_PREFIX macro.
(connected_add_ipv4) Set prefixlen in destination addresses (required
by the CONNECTED_PREFIX macro). Use CONNECTED_PEER macro instead
of testing for IFF_POINTOPOINT. Delete invalid warning message.
Warn about cases where the ZEBRA_IFA_PEER is set but no
destination address has been supplied (and turn off the flag).
(connected_add_ipv6) Add new flags argument so callers may set
the ZEBRA_IFA_PEER flag. If peer/broadcast address satisfies
IN6_IS_ADDR_UNSPECIFIED, then reject it with a warning.
Set prefixlen in destination address so CONNECTED_PREFIX will work.
* connected.h: (connected_add_ipv6) Add new flags argument so
callers may set the ZEBRA_IFA_PEER flag.
* interface.c: (connected_dump_vty) Use CONNECTED_PEER macro
to decide whether the destination address is a peer or broadcast
address (instead of checking IFF_BROADCAST and IFF_POINTOPOINT).
* if_ioctl.c: (if_getaddrs) Instead of setting a peer address
only when the IFF_POINTOPOINT is set, we now accept a peer
address whenever it is available and not the same as the local
address. Otherwise (no peer address assigned), we check
for a broadcast address (regardless of the IFF_BROADCAST flag).
And must now pass a flags value of ZEBRA_IFA_PEER to
connected_add_ipv4 when a peer address is assigned.
The same new logic is used with the IPv6 code as well (and we
pass the new flags argument to connected_add_ipv6).
(if_get_addr) Do not bother to check IFF_POINTOPOINT: just
issue the SIOCGIFDSTADDR ioctl and see if we get back
a peer address not matching the local address (and set
the ZEBRA_IFA_PEER in that case). If there's no peer address,
try to grab SIOCGIFBRDADDR regardless of whether IFF_BROADCAST is set.
* if_ioctl_solaris.c: (if_get_addr) Just try the SIOCGLIFDSTADDR ioctl
without bothering to check the IFF_POINTOPOINT flag. And if
no peer address was found, just try the SIOCGLIFBRDADDR ioctl
without checking the IFF_BROADCAST flag. Call connected_add_ipv4
and connected_add_ipv6 with appropriate flags.
* if_proc.c: (ifaddr_proc_ipv6) Must pass new flags argument to
connected_add_ipv6.
* kernel_socket.c: (ifam_read) Must pass new flags argument to
connected_add_ipv6.
* rt_netlink.c: (netlink_interface_addr) Copy logic from iproute2
to determine local and possible peer address (so there's no longer
a test for IFF_POINTOPOINT). Set ZEBRA_IFA_PEER flag appropriately.
Pass new flags argument to connected_add_ipv6.
(netlink_address) Test !CONNECTED_PEER instead of if_is_broadcast
to determine whether the connected destination address is a
broadcast address.
* bgp_nexthop.c: (bgp_connected_add, bgp_connected_delete)
Simplify logic by using new CONNECTED_PREFIX macro.
* ospf_interface.c: (ospf_if_is_configured, ospf_if_lookup_by_prefix,
ospf_if_lookup_recv_if) Simplify logic using new CONNECTED_PREFIX
macro.
* ospf_lsa.c: (lsa_link_ptop_set) Using the new CONNECTED_PREFIX
macro, both options collapse into the same code.
* ospf_snmp.c: (ospf_snmp_if_update) Simplify logic using new
CONNECTED_ID macro.
(ospf_snmp_is_if_have_addr) Simplify logic using new CONNECTED_PREFIX
macro.
* ospf_vty.c: (show_ip_ospf_interface_sub) Use new CONNECTED_PEER macro
instead of testing the IFF_POINTOPOINT flag.
* ospfd.c: (ospf_network_match_iface) Use new CONNECTED_PEER macro
instead of testing with if_is_pointopoint. And add commented-out
code to implement alternative (in my opinion) more elegant behavior
that has no special-case treatment for PtP addresses.
(ospf_network_run) Use new CONNECTED_ID macro to simplify logic.
* rip_interface.c: (rip_interface_multicast_set) Use new CONNECTED_ID
macro to simplify logic.
(rip_request_interface_send) Fix minor bug: ipv4_broadcast_addr does
not give a useful result if prefixlen is 32 (we require a peer
address in such cases).
* ripd.c: (rip_update_interface) Fix same bug as above.
diff --git a/zebra/if_ioctl_solaris.c b/zebra/if_ioctl_solaris.c
index 095bcab..4cb16c7 100644
--- a/zebra/if_ioctl_solaris.c
+++ b/zebra/if_ioctl_solaris.c
@@ -258,6 +258,7 @@
char *dest_pnt = NULL;
u_char prefixlen = 0;
afi_t af;
+ int flags = 0;
/* Interface's name and address family.
* We need to use the logical interface name / label, if we've been
@@ -272,21 +273,14 @@
/* Point to point or broad cast address pointer init. */
dest_pnt = NULL;
- if (ifp->flags & IFF_POINTOPOINT)
+ if (AF_IOCTL (af, SIOCGLIFDSTADDR, (caddr_t) & lifreq) >= 0)
{
- ret = AF_IOCTL (af, SIOCGLIFDSTADDR, (caddr_t) & lifreq);
-
- if (ret < 0)
- {
- zlog_warn ("SIOCGLIFDSTADDR (%s) fail: %s",
- ifp->name, safe_strerror (errno));
- return ret;
- }
memcpy (&dest, &lifreq.lifr_dstaddr, ADDRLEN (addr));
if (af == AF_INET)
dest_pnt = (char *) &(SIN (&dest)->sin_addr);
else
dest_pnt = (char *) &(SIN6 (&dest)->sin6_addr);
+ flags = ZEBRA_IFA_PEER;
}
if (af == AF_INET)
@@ -306,19 +300,8 @@
memcpy (&mask, &lifreq.lifr_addr, ADDRLEN (addr));
prefixlen = ip_masklen (SIN (&mask)->sin_addr);
- if (ifp->flags & IFF_BROADCAST)
- {
- ret = if_ioctl (SIOCGLIFBRDADDR, (caddr_t) & lifreq);
- if (ret < 0)
- {
- if (errno != EADDRNOTAVAIL)
- {
- zlog_warn ("SIOCGLIFBRDADDR (%s) fail: %s",
- ifp->name, safe_strerror (errno));
- return ret;
- }
- return 0;
- }
+ if (!dest_pnt && (if_ioctl (SIOCGLIFBRDADDR, (caddr_t) & lifreq) >= 0))
+ {
memcpy (&dest, &lifreq.lifr_broadaddr, sizeof (struct sockaddr_in));
dest_pnt = (char *) &SIN (&dest)->sin_addr;
}
@@ -348,11 +331,11 @@
/* Set address to the interface. */
if (af == AF_INET)
- connected_add_ipv4 (ifp, 0, &SIN (addr)->sin_addr, prefixlen,
+ connected_add_ipv4 (ifp, flags, &SIN (addr)->sin_addr, prefixlen,
(struct in_addr *) dest_pnt, label);
#ifdef HAVE_IPV6
else if (af == AF_INET6)
- connected_add_ipv6 (ifp, &SIN6 (addr)->sin6_addr, prefixlen,
+ connected_add_ipv6 (ifp, flags, &SIN6 (addr)->sin6_addr, prefixlen,
(struct in6_addr *) dest_pnt, label);
#endif /* HAVE_IPV6 */