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Move NEXT_HOP attribute so that we can exclude it.

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We will need to do that when we will send IPv6 routes (RFC4760 says we SHOULD
NOT carry this attribute when we will send UPDATE without NLRI). So, we save
the length of all the attributes except NEXT_HOP for later memcpy().

Signed-off-by: Benjamin Cama <benoar@dolka.fr>
This commit is contained in:
Benjamin Cama 2011-07-20 00:49:28 +02:00
parent f2e59e9881
commit 02611e54fc
2 changed files with 13 additions and 9 deletions
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21
bgp.c
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@ -193,15 +193,6 @@ int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,
ADD_ATTRIBUTE();
/* NEXT_HOP */
a.flags = BGP_PATH_ATTR_FLAG_TRANS;
a.code = BGP_PATH_ATTR_CODE_NEXT_HOP;
ip = my_address; /* we're it */
a.data.s.len = sizeof(ip);
memcpy(a.data.s.value, &ip, sizeof(ip));
ADD_ATTRIBUTE();
/* MULTI_EXIT_DISC */
a.flags = BGP_PATH_ATTR_FLAG_OPTIONAL;
a.code = BGP_PATH_ATTR_CODE_MULTI_EXIT_DISC;
@ -231,6 +222,18 @@ int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,
ADD_ATTRIBUTE();
/* remember the len before adding NEXT_HOP */
peer->path_attr_len_without_nexthop = peer->path_attr_len;
/* NEXT_HOP */
a.flags = BGP_PATH_ATTR_FLAG_TRANS;
a.code = BGP_PATH_ATTR_CODE_NEXT_HOP;
ip = my_address; /* we're it */
a.data.s.len = sizeof(ip);
memcpy(a.data.s.value, &ip, sizeof(ip));
ADD_ATTRIBUTE();
if (!(peer->path_attrs = malloc(peer->path_attr_len)))
{
LOG(0, 0, 0, "Can't allocate path_attrs for %s (%s)\n",