X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/c239d4b22829335fda98b66ce045a3f624436eeb..refs/heads/samesversion:/bgp.h?ds=sidebyside

diff --git a/bgp.h b/bgp.h
index 635a65d..8e636ab 100644
--- a/bgp.h
+++ b/bgp.h
@@ -1,5 +1,5 @@
 /* BGPv4 (RFC1771) */
-/* $Id: bgp.h,v 1.1 2004-06-23 03:52:24 fred_nerk Exp $ */
+/* $Id: bgp.h,v 1.5 2005-06-04 15:42:35 bodea Exp $ */
 
 #ifndef __BGP_H__
 #define __BGP_H__
@@ -7,6 +7,7 @@
 #define BGP_MAX_PACKET_SIZE	4096
 #define BGP_HOLD_TIME		180	/* seconds before peer times us out */
 #define BGP_KEEPALIVE_TIME	60	/* seconds between messages */
+#define BGP_STATE_TIME		60	/* state transition timeout in seconds */
 #define BGP_MAX_RETRY		42	/* maximum number of times to retry */
 #define BGP_RETRY_BACKOFF	60	/* number of seconds between retries,
 					   cumulative */
@@ -16,8 +17,8 @@
 
 struct bgp_header {
     char marker[16];
-    u16 len;
-    u8 type;
+    uint16_t len;
+    uint8_t type;
 } __attribute__ ((packed));
 
 /* bgp_header.type */
@@ -32,38 +33,94 @@ struct bgp_packet {
 } __attribute__ ((packed));
 
 struct bgp_data_open {
-    u8 version;
+    uint8_t version;
 #define BGP_VERSION	4
-    u16 as;
-    u16 hold_time;
-    u32 identifier;
-    u8 opt_len;
+    uint16_t as;
+    uint16_t hold_time;
+    uint32_t identifier;
+    uint8_t opt_len;
 #define BGP_DATA_OPEN_SIZE	10 /* size of struct excluding opt_params */
     char opt_params[sizeof(((struct bgp_packet *)0)->data) - BGP_DATA_OPEN_SIZE]; /* variable */
 } __attribute__ ((packed));
 
+struct bgp_opt_param {
+    uint8_t type;
+    uint8_t len;
+#define BGP_MAX_OPT_PARAM_SIZE	256
+    char value[BGP_MAX_OPT_PARAM_SIZE];
+} __attribute__ ((packed));
+
+#define BGP_PARAM_TYPE_CAPABILITY	2
+struct bgp_capability {
+    uint8_t code;
+    uint8_t len;
+#define BGP_MAX_CAPABILITY_SIZE	256
+    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 {
-    u8 len;
-    u32 prefix; /* variable */
+    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 {
-    u8 flags;
-    u8 code;
+    uint8_t flags;
+    uint8_t code;
     union {
 	struct {
-	    u8 len;
+	    uint8_t len;
 	    char value[29];		/* semi-random size, adequate for l2tpns */
 	} __attribute__ ((packed)) s;	/* short */
 	struct {
-	    u16 len;
+	    uint16_t len;
 	    char value[28];
 	} __attribute__ ((packed)) e;	/* extended */
     } 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)
@@ -84,9 +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_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 */
@@ -94,12 +153,13 @@ struct bgp_path_attr {
 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED	0xffffff03	/* don't advertise to any other AS */
 
 struct bgp_data_notification {
-    u8 error_code;
-    u8 error_subcode;
+    uint8_t error_code;
+    uint8_t error_subcode;
     char data[sizeof(((struct bgp_packet *)0)->data) - 2]; /* variable */
 } __attribute__ ((packed));
 
 /* bgp_data_notification.error_code, .error_subcode */
+#define BGP_ERR_UNSPEC			0
 #define BGP_ERR_HEADER			1
 #  define BGP_ERR_HDR_NOT_SYNC		  1
 #  define BGP_ERR_HDR_BAD_LEN		  2
@@ -111,6 +171,7 @@ struct bgp_data_notification {
 #  define BGP_ERR_OPN_UNSUP_PARAM	  4
 #  define BGP_ERR_OPN_AUTH_FAILURE	  5
 #  define BGP_ERR_OPN_HOLD_TIME		  6
+#  define BGP_ERR_OPN_UNSUP_CAP		  7
 #define BGP_ERR_UPDATE			3
 #  define BGP_ERR_UPD_BAD_ATTR_LIST	  1
 #  define BGP_ERR_UPD_UNKN_WK_ATTR	  2
@@ -137,6 +198,11 @@ enum bgp_state {
     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;
@@ -147,10 +213,17 @@ struct bgp_buf {
     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 */
+    in_addr_t source_addr;		/* our source address */
     int as;				/* AS number */
     int sock;
     enum bgp_state state;		/* FSM state */
@@ -159,7 +232,10 @@ struct bgp_peer {
     time_t keepalive_time;		/* time to send next keepalive */
     time_t retry_time;			/* time for connection retry */
     int retry_count;			/* connection retry count */
-    int hold;				/* hold time from peer */
+    int init_keepalive;			/* initial keepalive time */
+    int init_hold;			/* initial hold time */
+    int keepalive;			/* negotiated keepalive time */
+    int hold;				/* negotiated hold time */
     time_t expire_time;			/* time next peer packet expected */
     int routing;			/* propagate routes */
     int update_routes;			/* UPDATE required */
@@ -169,6 +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 path_attr_len_without_nexthop;	/* length of path attrs  without NEXT_HOP */
+    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 */
@@ -176,27 +260,25 @@ struct bgp_peer {
 #define BGP_CLI_ENABLE		2
 #define BGP_CLI_RESTART		3
 
-#define BGP_NUM_PEERS 2
 extern struct bgp_peer *bgp_peers;
-extern struct bgp_route_list *bgp_routes;
 extern int bgp_configured;
 
 /* actions */
 int bgp_setup(int as);
-int bgp_start(struct bgp_peer *peer, char *name, int as, int enable);
+int bgp_start(struct bgp_peer *peer, char *name, int as, int keepalive,
+    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);
-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_select_state(struct bgp_peer *peer);
-int bgp_process(struct bgp_peer *peer, int readable, int writable);
-
-/* CLI */
-int cmd_show_bgp(struct cli_def *cli, char *command, char **argv, int argc);
-int cmd_suspend_bgp(struct cli_def *cli, char *command, char **argv, int argc);
-int cmd_no_suspend_bgp(struct cli_def *cli, char *command, char **argv, int argc);
-int cmd_restart_bgp(struct cli_def *cli, char *command, char **argv, int argc);
+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);
 
 #endif /* __BGP_H__ */