Implements hostcache and recursive next hops.

Hostcache is a structure for monitoring changes in a routing table that
is used for routes with dynamic/recursive next hops. This is needed for
proper iBGP next hop handling.

3 files changed, 19 insertions, 31 deletions

diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index 4c8676e..9ae658d 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -244,7 +244,6 @@ krt_set_start(struct krt_proto *x, int first UNUSED)
 static void
 krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
 {
-  rta a;
   rte *e;
   net *net;
   sockaddr dst, gate, mask;
@@ -329,17 +328,12 @@ krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
 
   net = net_get(p->p.table, idst, pxlen);
 
-  bzero(&a, sizeof(a));
-
-  a.proto = &p->p;
-  a.source = RTS_INHERIT;
-  a.scope = SCOPE_UNIVERSE;
-  a.cast = RTC_UNICAST;
-  a.flags = a.aflags = 0;
-  a.from = IPA_NONE;
-  a.gw = IPA_NONE;
-  a.iface = NULL;
-  a.eattrs = NULL;
+  rta a = {
+    .proto = &p->p,
+    .source = RTS_INHERIT,
+    .scope = SCOPE_UNIVERSE,
+    .cast = RTC_UNICAST
+  };
 
   /* reject/blackhole routes have also set RTF_GATEWAY,
      we wil check them first. */
diff --git a/sysdep/linux/krt-scan.c b/sysdep/linux/krt-scan.c
index feb128e..8591607 100644
--- a/sysdep/linux/krt-scan.c
+++ b/sysdep/linux/krt-scan.c
@@ -48,7 +48,6 @@ krt_parse_entry(byte *ent, struct krt_proto *p)
   int masklen;
   net *net;
   byte *iface = ent;
-  rta a;
   rte *e;
 
   if (sscanf(ent, "%*s\t%x\t%x\t%x\t%*d\t%*d\t%*d\t%x\t", &dest0, &gw0, &flags, &mask0) != 4)
@@ -88,14 +87,12 @@ krt_parse_entry(byte *ent, struct krt_proto *p)
 
   net = net_get(p->p.table, dest, masklen);
 
-  a.proto = &p->p;
-  a.source = RTS_INHERIT;
-  a.scope = SCOPE_UNIVERSE;
-  a.cast = RTC_UNICAST;
-  a.flags = a.aflags = 0;
-  a.from = IPA_NONE;
-  a.iface = NULL;
-  a.eattrs = NULL;
+  rta a = {
+    .proto = &p->p,
+    .source = RTS_INHERIT,
+    .scope = SCOPE_UNIVERSE,
+    .cast = RTC_UNICAST
+  };
 
   if (flags & RTF_GATEWAY)
     {
diff --git a/sysdep/linux/netlink/netlink.c b/sysdep/linux/netlink/netlink.c
index a10a2e9..2dd0359 100644
--- a/sysdep/linux/netlink/netlink.c
+++ b/sysdep/linux/netlink/netlink.c
@@ -570,7 +570,6 @@ nl_parse_route(struct nlmsghdr *h, int scan)
   struct rtattr *a[RTA_CACHEINFO+1];
   int new = h->nlmsg_type == RTM_NEWROUTE;
   ip_addr dst;
-  rta ra;
   rte *e;
   net *net;
   u32 oif;
@@ -655,15 +654,13 @@ nl_parse_route(struct nlmsghdr *h, int scan)
     }
 
   net = net_get(p->p.table, dst, i->rtm_dst_len);
-  ra.proto = &p->p;
-  ra.source = RTS_INHERIT;
-  ra.scope = SCOPE_UNIVERSE;
-  ra.cast = RTC_UNICAST;
-  ra.flags = ra.aflags = 0;
-  ra.from = IPA_NONE;
-  ra.gw = IPA_NONE;
-  ra.iface = NULL;
-  ra.eattrs = NULL;
+
+  rta ra = {
+    .proto = &p->p,
+    .source = RTS_INHERIT,
+    .scope = SCOPE_UNIVERSE,
+    .cast = RTC_UNICAST
+  };
 
   switch (i->rtm_type)
     {