Merge branch 'master' into samesversion

[l2tpns.git] / bgp.h

diff --git a/bgp.h b/bgp.h
index beb68f9..8e636ab 100644 (file)
--- a/bgp.h
+++ b/bgp.h
@@ -1,5 +1,5 @@
 /* BGPv4 (RFC1771) */
 /* BGPv4 (RFC1771) */

-/* $Id: bgp.h,v 1.5 2005/06/04 15:42:35 bodea Exp $ */
+/* $Id: bgp.h,v 1.5 2005-06-04 15:42:35 bodea Exp $ */

 
 #ifndef __BGP_H__
 #define __BGP_H__
 
 #ifndef __BGP_H__
 #define __BGP_H__


@@ -46,23 +46,48 @@ struct bgp_data_open {
 struct bgp_opt_param {
     uint8_t type;
     uint8_t len;
 struct bgp_opt_param {
     uint8_t type;
     uint8_t len;

-#define BGP_MAX_OPT_PARAM_SIZE 256
+#define BGP_MAX_OPT_PARAM_SIZE 256

     char value[BGP_MAX_OPT_PARAM_SIZE];
 } __attribute__ ((packed));
 
     char value[BGP_MAX_OPT_PARAM_SIZE];
 } __attribute__ ((packed));
 

-#define BGP_CAPABILITY_PARAM_TYPE 2
+#define BGP_PARAM_TYPE_CAPABILITY      2

 struct bgp_capability {
     uint8_t code;
     uint8_t len;
 struct bgp_capability {
     uint8_t code;
     uint8_t len;

-#define BGP_MAX_CAPABILITY_SIZE 256
+#define BGP_MAX_CAPABILITY_SIZE        256

     char value[BGP_MAX_CAPABILITY_SIZE];
 } __attribute__ ((packed));
 
     char value[BGP_MAX_CAPABILITY_SIZE];
 } __attribute__ ((packed));
 

+/* RFC4760 Multiprotocol extension */
+#define BGP_CAP_CODE_MP        1
+
+struct bgp_mp_cap_param {
+    uint16_t afi; /* sa_family_t */
+    uint8_t reserved; /* SHOULD be 0 */
+    uint8_t safi;
+} __attribute__ ((packed));
+
+/* bgp_mp_cap_param.afi */
+#define BGP_MP_AFI_RESERVED    0
+#define BGP_MP_AFI_IPv4                1
+#define BGP_MP_AFI_IPv6                2
+/* bgp_mp_cap_param.safi */
+#define BGP_MP_SAFI_UNICAST    1
+#define BGP_MP_SAFI_MULTICAST  2
+
+struct bgp_ip6_prefix {
+    uint8_t len;
+    uint8_t prefix[16]; /* variable */
+} __attribute__ ((packed));
+
+/* end of RFC4760 specific definitions */
+

 struct bgp_ip_prefix {
     uint8_t len;
     uint32_t prefix; /* variable */
 } __attribute__ ((packed));
 
 struct bgp_ip_prefix {
     uint8_t len;
     uint32_t prefix; /* variable */
 } __attribute__ ((packed));
 

+/* works for both IPv4 and IPv6 prefixes */

 #define BGP_IP_PREFIX_SIZE(p) (1 + ((p).len / 8) + ((p).len % 8 != 0))
 
 struct bgp_path_attr {
 #define BGP_IP_PREFIX_SIZE(p) (1 + ((p).len / 8) + ((p).len % 8 != 0))
 
 struct bgp_path_attr {


@@ -80,6 +105,22 @@ struct bgp_path_attr {
     } data; /* variable */
 } __attribute__ ((packed));
 
     } 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)
 /* bgp_path_attr.flags (bitfields) */
 #define BGP_PATH_ATTR_FLAG_OPTIONAL    (1 << 7)
 #define BGP_PATH_ATTR_FLAG_TRANS       (1 << 6)


@@ -100,9 +141,11 @@ 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_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) \
 
 #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 */
 
 /* well known COMMUNITIES */
 #define BGP_COMMUNITY_NO_EXPORT                        0xffffff01      /* don't advertise outside confederation */


@@ -155,6 +198,11 @@ enum bgp_state {
     Established,                       /* established */
 };
 
     Established,                       /* established */
 };
 

+struct bgp_route6_list {
+    struct bgp_ip6_prefix dest;
+    struct bgp_route6_list *next;
+};
+

 struct bgp_route_list {
     struct bgp_ip_prefix dest;
     struct bgp_route_list *next;
 struct bgp_route_list {
     struct bgp_ip_prefix dest;
     struct bgp_route_list *next;


@@ -165,10 +213,17 @@ struct bgp_buf {
     size_t done;                       /* bytes sent/recvd */
 };
 
     size_t done;                       /* bytes sent/recvd */
 };
 

+enum bgp_mp_handling {
+    HandleIPv6Routes,
+    DoesntHandleIPv6Routes,
+    HandlingUnknown,
+};
+

 /* state */
 struct bgp_peer {
     char name[32];                     /* peer name */
     in_addr_t addr;                    /* peer address */
 /* state */
 struct bgp_peer {
     char name[32];                     /* peer name */
     in_addr_t addr;                    /* peer address */

+    in_addr_t source_addr;             /* our source address */

     int as;                            /* AS number */
     int sock;
     enum bgp_state state;              /* FSM state */
     int as;                            /* AS number */
     int sock;
     enum bgp_state state;              /* FSM state */


@@ -190,8 +245,14 @@ struct bgp_peer {
     int cli_flag;                      /* updates requested from CLI */
     char *path_attrs;                  /* path attrs to send in UPDATE message */
     int path_attr_len;                 /* length of path attrs */
     int cli_flag;                      /* updates requested from CLI */
     char *path_attrs;                  /* path attrs to send in UPDATE message */
     int path_attr_len;                 /* length of path attrs */

+    int path_attr_len_without_nexthop; /* length of path attrs  without NEXT_HOP */

     uint32_t events;                   /* events to poll */
     struct event_data edata;           /* poll data */
     uint32_t events;                   /* events to poll */
     struct event_data edata;           /* poll data */

+    enum bgp_mp_handling mp_handling;  /* how it handles 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 */
 };
 
 /* bgp_peer.cli_flag */


@@ -205,18 +266,19 @@ extern int bgp_configured;
 /* actions */
 int bgp_setup(int as);
 int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,
 /* actions */
 int bgp_setup(int as);
 int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,

-    int hold, int enable);
+    int hold, struct in_addr update_source, int enable);

 
 void bgp_stop(struct bgp_peer *peer);
 void bgp_halt(struct bgp_peer *peer);
 int bgp_restart(struct bgp_peer *peer);
 
 void bgp_stop(struct bgp_peer *peer);
 void bgp_halt(struct bgp_peer *peer);
 int bgp_restart(struct bgp_peer *peer);

-int bgp_add_route(in_addr_t ip, in_addr_t mask);
-int bgp_del_route(in_addr_t ip, in_addr_t mask);
+int bgp_add_route(in_addr_t ip, int prefixlen);
+int bgp_add_route6(struct in6_addr ip, int prefixlen);
+int bgp_del_route(in_addr_t ip, int prefixlen);
+int bgp_del_route6(struct in6_addr ip, int prefixlen);

 void bgp_enable_routing(int enable);
 int bgp_set_poll(void);
 int bgp_process(uint32_t events[]);
 void bgp_enable_routing(int enable);
 int bgp_set_poll(void);
 int bgp_process(uint32_t events[]);

+void bgp_process_peers_timers();

 char const *bgp_state_str(enum bgp_state state);
 
 char const *bgp_state_str(enum bgp_state state);
 

-extern char const *cvs_id_bgp;
-

 #endif /* __BGP_H__ */
 #endif /* __BGP_H__ */