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zebra: Refactor nexthop_active to remove duplicate code

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Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2017-06-07 07:34:16 -04:00
parent 326452238a
commit 4491a88f9e
1 changed files with 65 additions and 112 deletions
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177
zebra/zebra_rib.c
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@ -329,6 +329,69 @@ route_entry_nexthop_blackhole_add (struct route_entry *re)
return nexthop;
}
static void
nexthop_set_resolved (afi_t afi, struct nexthop *newhop, struct nexthop *nexthop)
{
struct nexthop *resolved_hop;
resolved_hop = nexthop_new();
SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE);
/* If the resolving route specifies a gateway, use it */
if (newhop->type == NEXTHOP_TYPE_IPV4
|| newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv4 = newhop->gate.ipv4;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
if (newhop->flags & NEXTHOP_FLAG_ONLINK)
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
}
}
if (newhop->type == NEXTHOP_TYPE_IPV6
|| newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv6 = newhop->gate.ipv6;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
}
}
/* If the resolving route is an interface route,
* it means the gateway we are looking up is connected
* to that interface. (The actual network is _not_ onlink).
* Therefore, the resolved route should have the original
* gateway as nexthop as it is directly connected.
*
* On Linux, we have to set the onlink netlink flag because
* otherwise, the kernel won't accept the route.
*/
if (newhop->type == NEXTHOP_TYPE_IFINDEX)
{
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
if (afi == AFI_IP)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->gate.ipv4 = nexthop->gate.ipv4;
}
else if (afi == AFI_IP6)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->gate.ipv6 = nexthop->gate.ipv6;
}
resolved_hop->ifindex = newhop->ifindex;
}
nexthop_add(&nexthop->resolved, resolved_hop);
}
/* If force flag is not set, do not modify falgs at all for uninstall
the route from FIB. */
static int
@ -341,7 +404,6 @@ nexthop_active (afi_t afi, struct route_entry *re, struct nexthop *nexthop, int
struct route_entry *match;
int resolved;
struct nexthop *newhop, *tnewhop;
struct nexthop *resolved_hop;
int recursing = 0;
struct interface *ifp;
@ -474,61 +536,7 @@ nexthop_active (afi_t afi, struct route_entry *re, struct nexthop *nexthop, int
SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE);
SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED);
resolved_hop = nexthop_new();
SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE);
/* If the resolving route specifies a gateway, use it */
if (newhop->type == NEXTHOP_TYPE_IPV4
|| newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv4 = newhop->gate.ipv4;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
if (newhop->flags & NEXTHOP_FLAG_ONLINK)
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
}
}
if (newhop->type == NEXTHOP_TYPE_IPV6
|| newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv6 = newhop->gate.ipv6;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
}
}
/* If the resolving route is an interface route,
* it means the gateway we are looking up is connected
* to that interface. (The actual network is _not_ onlink).
* Therefore, the resolved route should have the original
* gateway as nexthop as it is directly connected.
*
* On Linux, we have to set the onlink netlink flag because
* otherwise, the kernel won't accept the route. */
if (newhop->type == NEXTHOP_TYPE_IFINDEX)
{
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
if (afi == AFI_IP)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->gate.ipv4 = nexthop->gate.ipv4;
}
else if (afi == AFI_IP6)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->gate.ipv6 = nexthop->gate.ipv6;
}
resolved_hop->ifindex = newhop->ifindex;
}
nexthop_add(&nexthop->resolved, resolved_hop);
nexthop_set_resolved(afi, newhop, nexthop);
}
resolved = 1;
}
@ -544,62 +552,7 @@ nexthop_active (afi_t afi, struct route_entry *re, struct nexthop *nexthop, int
{
SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE);
resolved_hop = nexthop_new();
SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE);
/* If the resolving route specifies a gateway, use it */
if (newhop->type == NEXTHOP_TYPE_IPV4
|| newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv4 = newhop->gate.ipv4;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
if (newhop->flags & NEXTHOP_FLAG_ONLINK)
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
}
}
if (newhop->type == NEXTHOP_TYPE_IPV6
|| newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
{
resolved_hop->type = newhop->type;
resolved_hop->gate.ipv6 = newhop->gate.ipv6;
if (newhop->ifindex)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->ifindex = newhop->ifindex;
}
}
/* If the resolving route is an interface route,
* it means the gateway we are looking up is connected
* to that interface. (The actual network is _not_ onlink).
* Therefore, the resolved route should have the original
* gateway as nexthop as it is directly connected.
*
* On Linux, we have to set the onlink netlink flag because
* otherwise, the kernel won't accept the route.
*/
if (newhop->type == NEXTHOP_TYPE_IFINDEX)
{
resolved_hop->flags |= NEXTHOP_FLAG_ONLINK;
if (afi == AFI_IP)
{
resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
resolved_hop->gate.ipv4 = nexthop->gate.ipv4;
}
else if (afi == AFI_IP6)
{
resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX;
resolved_hop->gate.ipv6 = nexthop->gate.ipv6;
}
resolved_hop->ifindex = newhop->ifindex;
}
nexthop_add(&nexthop->resolved, resolved_hop);
nexthop_set_resolved(afi, newhop, nexthop);
}
resolved = 1;
}