BGP: Fix unknown attribute handling
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parent
e62cd03307
commit
d493d0f180
3 changed files with 44 additions and 1 deletions
40
nest/route.h
40
nest/route.h
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@ -555,6 +555,46 @@ uint ea_hash(ea_list *e); /* Calculate 16-bit hash value */
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ea_list *ea_append(ea_list *to, ea_list *what);
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ea_list *ea_append(ea_list *to, ea_list *what);
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void ea_format_bitfield(struct eattr *a, byte *buf, int bufsize, const char **names, int min, int max);
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void ea_format_bitfield(struct eattr *a, byte *buf, int bufsize, const char **names, int min, int max);
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static inline eattr *
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ea_set_attr(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, uintptr_t val)
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{
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ea_list *a = lp_alloc(pool, sizeof(ea_list) + sizeof(eattr));
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eattr *e = &a->attrs[0];
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a->flags = EALF_SORTED;
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a->count = 1;
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a->next = *to;
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*to = a;
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e->id = id;
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e->type = type;
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e->flags = flags;
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if (type & EAF_EMBEDDED)
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e->u.data = (u32) val;
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else
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e->u.ptr = (struct adata *) val;
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return e;
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}
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static inline void
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ea_set_attr_u32(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, u32 val)
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{ ea_set_attr(to, pool, id, flags, type, (uintptr_t) val); }
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static inline void
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ea_set_attr_ptr(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, struct adata *val)
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{ ea_set_attr(to, pool, id, flags, type, (uintptr_t) val); }
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static inline void
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ea_set_attr_data(ea_list **to, struct linpool *pool, uint id, uint flags, uint type, void *data, uint len)
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{
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struct adata *a = lp_alloc_adata(pool, len);
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memcpy(a->data, data, len);
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ea_set_attr(to, pool, id, flags, type, (uintptr_t) a);
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}
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#define NEXTHOP_MAX_SIZE (sizeof(struct nexthop) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
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#define NEXTHOP_MAX_SIZE (sizeof(struct nexthop) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
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static inline size_t nexthop_size(const struct nexthop *nh)
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static inline size_t nexthop_size(const struct nexthop *nh)
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@ -701,7 +701,8 @@ bgp_format_mpls_label_stack(eattr *a, byte *buf, uint size)
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static inline void
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static inline void
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bgp_decode_unknown(struct bgp_parse_state *s, uint code, uint flags, byte *data, uint len, ea_list **to)
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bgp_decode_unknown(struct bgp_parse_state *s, uint code, uint flags, byte *data, uint len, ea_list **to)
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{
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{
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bgp_set_attr_data(to, s->pool, code, flags, data, len);
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/* Cannot use bgp_set_attr_data() as it works on known attributes only */
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ea_set_attr_data(to, s->pool, EA_CODE(EAP_BGP, code), flags, EAF_TYPE_OPAQUE, data, len);
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}
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}
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@ -2284,6 +2284,8 @@ bgp_rx_update(struct bgp_conn *conn, byte *pkt, uint len)
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if (s.attr_len)
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if (s.attr_len)
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ea = bgp_decode_attrs(&s, s.attrs, s.attr_len);
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ea = bgp_decode_attrs(&s, s.attrs, s.attr_len);
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else
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ea = NULL;
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/* Check for End-of-RIB marker */
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/* Check for End-of-RIB marker */
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if (!s.attr_len && !s.ip_unreach_len && !s.ip_reach_len)
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if (!s.attr_len && !s.ip_unreach_len && !s.ip_reach_len)
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