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as_path_prepend is usable outside bgp.

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Pavel Machek 2000-04-12 14:12:37 +00:00
parent c2b28c9910
commit 0a40e97328
2 changed files with 19 additions and 12 deletions
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2
filter/filter.c
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@ -764,7 +764,7 @@ comlist_del(struct linpool *pool, struct adata *list, u32 val)
} }
struct adata * struct adata *
comlist_empty(struct linpool *pool) adata_empty(struct linpool *pool)
{ {
struct adata *res = lp_alloc(pool, sizeof(struct adata)); struct adata *res = lp_alloc(pool, sizeof(struct adata));
res->length = 0; res->length = 0;

29
proto/bgp/attrs.c
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@ -278,19 +278,11 @@ bgp_create_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p
return 0; /* Leave decision to the filters */ return 0; /* Leave decision to the filters */
} }
ea_list * struct adata *
bgp_path_prepend(struct linpool *pool, eattr *a, ea_list *old, int as) as_path_prepend(struct linpool *pool, struct adata *olda, int as)
{ {
struct ea_list *e = lp_alloc(pool, sizeof(ea_list) + sizeof(eattr));
struct adata *olda = a->u.ptr;
struct adata *newa; struct adata *newa;
e->next = old;
e->flags = EALF_SORTED;
e->count = 1;
e->attrs[0].id = EA_CODE(EAP_BGP, BA_AS_PATH);
e->attrs[0].flags = BAF_TRANSITIVE;
e->attrs[0].type = EAF_TYPE_AS_PATH;
if (olda->length && olda->data[0] == 2 && olda->data[1] < 255) /* Starting with sequence => just prepend the AS number */ if (olda->length && olda->data[0] == 2 && olda->data[1] < 255) /* Starting with sequence => just prepend the AS number */
{ {
newa = lp_alloc(pool, sizeof(struct adata) + olda->length + 2); newa = lp_alloc(pool, sizeof(struct adata) + olda->length + 2);
@ -308,7 +300,22 @@ bgp_path_prepend(struct linpool *pool, eattr *a, ea_list *old, int as)
memcpy(newa->data+4, olda->data, olda->length); memcpy(newa->data+4, olda->data, olda->length);
} }
put_u16(newa->data+2, as); put_u16(newa->data+2, as);
e->attrs[0].u.ptr = newa; return newa;
}
static ea_list *
bgp_path_prepend(struct linpool *pool, eattr *a, ea_list *old, int as)
{
struct ea_list *e = lp_alloc(pool, sizeof(ea_list) + sizeof(eattr));
struct adata *olda = a->u.ptr;
e->next = old;
e->flags = EALF_SORTED;
e->count = 1;
e->attrs[0].id = EA_CODE(EAP_BGP, BA_AS_PATH);
e->attrs[0].flags = BAF_TRANSITIVE;
e->attrs[0].type = EAF_TYPE_AS_PATH;
e->attrs[0].u.ptr = path_prepend(pool, olda, as);
return e; return e;
} }