void
rtm_read (struct rt_msghdr *rtm)
{
int flags;
u_char zebra_flags;
union sockunion dest, mask, gate;
char ifname[INTERFACE_NAMSIZ + 1];
short ifnlen = 0;
zebra_flags = 0;
/* Read destination and netmask and gateway from rtm message
structure. */
flags = rtm_read_mesg (rtm, &dest, &mask, &gate, ifname, &ifnlen);
if (!(flags & RTF_DONE))
return;
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_debug ("%s: got rtm of type %d (%s)", __func__, rtm->rtm_type,
lookup (rtm_type_str, rtm->rtm_type));
#ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
if (flags & RTF_CLONED)
return;
#endif
#ifdef RTF_WASCLONED /*freebsd*/
if (flags & RTF_WASCLONED)
return;
#endif
if ((rtm->rtm_type == RTM_ADD) && ! (flags & RTF_UP))
return;
/* This is connected route. */
if (! (flags & RTF_GATEWAY))
return;
if (flags & RTF_PROTO1)
SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE);
/* This is persistent route. */
if (flags & RTF_STATIC)
SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC);
/* This is a reject or blackhole route */
if (flags & RTF_REJECT)
SET_FLAG (zebra_flags, ZEBRA_FLAG_REJECT);
if (flags & RTF_BLACKHOLE)
SET_FLAG (zebra_flags, ZEBRA_FLAG_BLACKHOLE);
if (dest.sa.sa_family == AF_INET)
{
struct prefix_ipv4 p;
p.family = AF_INET;
p.prefix = dest.sin.sin_addr;
if (flags & RTF_HOST)
p.prefixlen = IPV4_MAX_PREFIXLEN;
else
p.prefixlen = ip_masklen (mask.sin.sin_addr);
/* Catch self originated messages and match them against our current RIB.
* At the same time, ignore unconfirmed messages, they should be tracked
* by rtm_write() and kernel_rtm_ipv4().
*/
if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid)
{
char buf[INET_ADDRSTRLEN], gate_buf[INET_ADDRSTRLEN];
int ret;
if (! IS_ZEBRA_DEBUG_RIB)
return;
ret = rib_lookup_ipv4_route (&p, &gate);
inet_ntop (AF_INET, &p.prefix, buf, INET_ADDRSTRLEN);
switch (rtm->rtm_type)
{
case RTM_ADD:
case RTM_GET:
case RTM_CHANGE:
/* The kernel notifies us about a new route in FIB created by us.
Do we have a correspondent entry in our RIB? */
switch (ret)
{
case ZEBRA_RIB_NOTFOUND:
zlog_debug ("%s: %s %s/%d: desync: RR isn't yet in RIB, while already in FIB",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen);
break;
case ZEBRA_RIB_FOUND_CONNECTED:
case ZEBRA_RIB_FOUND_NOGATE:
inet_ntop (AF_INET, &gate.sin.sin_addr, gate_buf, INET_ADDRSTRLEN);
zlog_debug ("%s: %s %s/%d: desync: RR is in RIB, but gate differs (ours is %s)",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen, gate_buf);
break;
case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR */
zlog_debug ("%s: %s %s/%d: done Ok",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen);
rib_lookup_and_dump (&p);
return;
break;
}
break;
case RTM_DELETE:
/* The kernel notifies us about a route deleted by us. Do we still
have it in the RIB? Do we have anything instead? */
switch (ret)
{
case ZEBRA_RIB_FOUND_EXACT:
zlog_debug ("%s: %s %s/%d: desync: RR is still in RIB, while already not in FIB",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen);
rib_lookup_and_dump (&p);
break;
case ZEBRA_RIB_FOUND_CONNECTED:
case ZEBRA_RIB_FOUND_NOGATE:
zlog_debug ("%s: %s %s/%d: desync: RR is still in RIB, plus gate differs",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen);
rib_lookup_and_dump (&p);
break;
case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */
zlog_debug ("%s: %s %s/%d: done Ok",
__func__, lookup (rtm_type_str, rtm->rtm_type), buf, p.prefixlen);
rib_lookup_and_dump (&p);
return;
break;
}
break;
default:
zlog_debug ("%s: %s/%d: warning: loopback RTM of type %s received",
__func__, buf, p.prefixlen, lookup (rtm_type_str, rtm->rtm_type));
}
return;
}
/* Change, delete the old prefix, we have no further information
* to specify the route really
*/
if (rtm->rtm_type == RTM_CHANGE)
rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p,
NULL, 0, 0);
if (rtm->rtm_type == RTM_GET
|| rtm->rtm_type == RTM_ADD
|| rtm->rtm_type == RTM_CHANGE)
rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, NULL, 0, 0, 0, 0, rtm->rtm_protocol);
else
rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, 0, 0);
}
#ifdef HAVE_IPV6
if (dest.sa.sa_family == AF_INET6)
{
/* One day we might have a debug section here like one in the
* IPv4 case above. Just ignore own messages at the moment.
*/
if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid)
return;
struct prefix_ipv6 p;
unsigned int ifindex = 0;
p.family = AF_INET6;
p.prefix = dest.sin6.sin6_addr;
if (flags & RTF_HOST)
p.prefixlen = IPV6_MAX_PREFIXLEN;
else
p.prefixlen = ip6_masklen (mask.sin6.sin6_addr);
#ifdef KAME
if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr))
{
ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr);
SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0);
}
#endif /* KAME */
/* CHANGE: delete the old prefix, we have no further information
* to specify the route really
*/
if (rtm->rtm_type == RTM_CHANGE)
rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p,
NULL, 0, 0);
if (rtm->rtm_type == RTM_GET
|| rtm->rtm_type == RTM_ADD
|| rtm->rtm_type == RTM_CHANGE)
rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0, 0, 0);
else
rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0);
}
#endif /* HAVE_IPV6 */
}
void
rtm_read (struct rt_msghdr *rtm)
{
int flags;
u_char zebra_flags;
union sockunion dest, mask, gate;
zebra_flags = 0;
/* Discard self send message. */
if (rtm->rtm_type != RTM_GET
&& (rtm->rtm_pid == pid || rtm->rtm_pid == old_pid))
return;
/* Read destination and netmask and gateway from rtm message
structure. */
flags = rtm_read_mesg (rtm, &dest, &mask, &gate);
#ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
if (flags & RTF_CLONED)
return;
#endif
#ifdef RTF_WASCLONED /*freebsd*/
if (flags & RTF_WASCLONED)
return;
#endif
if ((rtm->rtm_type == RTM_ADD) && ! (flags & RTF_UP))
return;
/* Ignore route which has both HOST and GATEWAY attribute. */
if ((flags & RTF_GATEWAY) && (flags & RTF_HOST))
return;
/* This is connected route. */
if (! (flags & RTF_GATEWAY))
return;
if (flags & RTF_PROTO1)
SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE);
/* This is persistent route. */
if (flags & RTF_STATIC)
SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC);
if (dest.sa.sa_family == AF_INET)
{
struct prefix_ipv4 p;
p.family = AF_INET;
p.prefix = dest.sin.sin_addr;
p.prefixlen = ip_masklen (mask.sin.sin_addr);
if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD)
rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, 0, 0, 0, 0);
else
rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, 0, 0);
}
#ifdef HAVE_IPV6
if (dest.sa.sa_family == AF_INET6)
{
struct prefix_ipv6 p;
unsigned int ifindex = 0;
p.family = AF_INET6;
p.prefix = dest.sin6.sin6_addr;
p.prefixlen = ip6_masklen (mask.sin6.sin6_addr);
#ifdef KAME
if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr))
{
ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr);
SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0);
}
#endif /* KAME */
if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD)
rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0);
else
rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0);
}
#endif /* HAVE_IPV6 */
}
void
rtm_read (struct rt_msghdr *rtm)
{
int flags;
u_char zebra_flags;
union sockunion dest, mask, gate;
char ifname[INTERFACE_NAMSIZ + 1];
short ifnlen = 0;
zebra_flags = 0;
/* Discard self send message. */
if (rtm->rtm_type != RTM_GET
&& (rtm->rtm_pid == pid || rtm->rtm_pid == old_pid))
return;
/* Read destination and netmask and gateway from rtm message
structure. */
flags = rtm_read_mesg (rtm, &dest, &mask, &gate, ifname, &ifnlen);
#ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
if (flags & RTF_CLONED)
return;
#endif
#ifdef RTF_WASCLONED /*freebsd*/
if (flags & RTF_WASCLONED)
return;
#endif
if ((rtm->rtm_type == RTM_ADD) && ! (flags & RTF_UP))
return;
/* This is connected route. */
if (! (flags & RTF_GATEWAY))
return;
if (flags & RTF_PROTO1)
SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE);
/* This is persistent route. */
if (flags & RTF_STATIC)
SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC);
/* This is a reject or blackhole route */
if (flags & RTF_REJECT)
SET_FLAG (zebra_flags, ZEBRA_FLAG_REJECT);
if (flags & RTF_BLACKHOLE)
SET_FLAG (zebra_flags, ZEBRA_FLAG_BLACKHOLE);
if (dest.sa.sa_family == AF_INET)
{
struct prefix_ipv4 p;
p.family = AF_INET;
p.prefix = dest.sin.sin_addr;
if (flags & RTF_HOST)
p.prefixlen = IPV4_MAX_PREFIXLEN;
else
p.prefixlen = ip_masklen (mask.sin.sin_addr);
/* Change, delete the old prefix, we have no further information
* to specify the route really
*/
if (rtm->rtm_type == RTM_CHANGE)
rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p,
NULL, 0, 0);
if (rtm->rtm_type == RTM_GET
|| rtm->rtm_type == RTM_ADD
|| rtm->rtm_type == RTM_CHANGE)
rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, 0, 0, 0, 0);
else
rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin.sin_addr, 0, 0);
}
#ifdef HAVE_IPV6
if (dest.sa.sa_family == AF_INET6)
{
struct prefix_ipv6 p;
unsigned int ifindex = 0;
p.family = AF_INET6;
p.prefix = dest.sin6.sin6_addr;
if (flags & RTF_HOST)
p.prefixlen = IPV6_MAX_PREFIXLEN;
else
p.prefixlen = ip6_masklen (mask.sin6.sin6_addr);
#ifdef KAME
if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr))
{
ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr);
SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0);
}
#endif /* KAME */
/* CHANGE: delete the old prefix, we have no further information
* to specify the route really
*/
if (rtm->rtm_type == RTM_CHANGE)
rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p,
NULL, 0, 0);
if (rtm->rtm_type == RTM_GET
|| rtm->rtm_type == RTM_ADD
|| rtm->rtm_type == RTM_CHANGE)
rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0, 0, 0);
else
rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags,
&p, &gate.sin6.sin6_addr, ifindex, 0);
}
#endif /* HAVE_IPV6 */
}
