welterde/l2tpns
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Handle multiprotocol UPDATE.

Browse source 
Add IPv6 routes advertisement handling, with MP path attributes heading
prepared on initialization.
BTW, fix a bug in attribute size calculation (for extended attr).

Signed-off-by: Benjamin Cama <benoar@dolka.fr>
This commit is contained in:
Benjamin Cama 2011-07-20 14:45:09 +02:00
parent 59411b8799
commit db276bcc80
2 changed files with 222 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

22
bgp.h
View file

@ -101,6 +101,22 @@ struct bgp_path_attr {
} data; /* variable */
} __attribute__ ((packed));
struct bgp_attr_mp_reach_nlri_partial {
uint16_t afi; /* sa_family_t */
uint8_t safi;
uint8_t next_hop_len;
uint8_t next_hop[16];
uint8_t reserved;
} __attribute__ ((packed));
#define BGP_PATH_ATTR_MP_REACH_NLRI_PARTIAL_SIZE (3 + sizeof(struct bgp_attr_mp_reach_nlri_partial))
struct bgp_attr_mp_unreach_nlri_partial {
uint16_t afi; /* sa_family_t */
uint8_t safi;
} __attribute__ ((packed));
/* we use it as an extended attribute */
#define BGP_PATH_ATTR_MP_UNREACH_NLRI_PARTIAL_SIZE (4 + sizeof(struct bgp_attr_mp_unreach_nlri_partial))
/* bgp_path_attr.flags (bitfields) */
#define BGP_PATH_ATTR_FLAG_OPTIONAL (1 << 7)
#define BGP_PATH_ATTR_FLAG_TRANS (1 << 6)
@ -121,9 +137,11 @@ struct bgp_path_attr {
#define BGP_PATH_ATTR_CODE_ATOMIC_AGGREGATE 6 /* well-known, discretionary */
#define BGP_PATH_ATTR_CODE_AGGREGATOR 7 /* optional, transitive */
#define BGP_PATH_ATTR_CODE_COMMUNITIES 8 /* optional, transitive (RFC1997) */
#define BGP_PATH_ATTR_CODE_MP_REACH_NLRI 14 /* optional, non-transitive (RFC4760) */
#define BGP_PATH_ATTR_CODE_MP_UNREACH_NLRI 15 /* optional, non-transitive (RFC4760) */
#define BGP_PATH_ATTR_SIZE(p) ((((p).flags & BGP_PATH_ATTR_FLAG_EXTLEN) \
? ((p).data.e.len + 1) : (p).data.s.len) + 3)
? ((p).data.e.len + 4) : (p).data.s.len) + 3)
/* well known COMMUNITIES */
#define BGP_COMMUNITY_NO_EXPORT 0xffffff01 /* don't advertise outside confederation */
@ -222,6 +240,8 @@ struct bgp_peer {
int handle_ipv6_routes; /* can handle IPv6 routes advertisements */
int update_routes6; /* UPDATE required for IPv6 routes */
struct bgp_route6_list *routes6; /* IPv6 routes known by this peer */
char mp_reach_nlri_partial[BGP_PATH_ATTR_MP_REACH_NLRI_PARTIAL_SIZE];
char mp_unreach_nlri_partial[BGP_PATH_ATTR_MP_UNREACH_NLRI_PARTIAL_SIZE];
};
/* bgp_peer.cli_flag */