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freebsd-ports/net/openbgpd/files/patch-bgpd_mrt.h
Hiroki Sato 256f3a3dba Update to 5.2.20121014. 
Feature safe:	yes
2012-10-13 19:40:42 +00:00

288 lines
8.7 KiB
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Index: bgpd/mrt.h
===================================================================
RCS file: /home/cvs/private/hrs/openbgpd/bgpd/mrt.h,v
retrieving revision 1.1.1.6
retrieving revision 1.1.1.9
diff -u -p -r1.1.1.6 -r1.1.1.9
--- bgpd/mrt.h 14 Feb 2010 20:19:57 -0000 1.1.1.6
+++ bgpd/mrt.h 13 Oct 2012 18:22:43 -0000 1.1.1.9
@@ -1,4 +1,4 @@
-/* $OpenBSD: mrt.h,v 1.23 2009/06/29 12:22:16 claudio Exp $ */
+/* $OpenBSD: mrt.h,v 1.30 2011/09/18 09:31:25 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Claudio Jeker <claudio@openbsd.org>
@@ -18,12 +18,10 @@
#ifndef __MRT_H__
#define __MRT_H__
-#include "bgpd.h"
-
/*
* MRT binary packet format
* For more info see:
- * draft-ietf-grow-mrt-04.txt, "MRT routing information export format"
+ * draft-ietf-grow-mrt-11.txt, "MRT routing information export format"
* http://www.quagga.net/docs/docs-multi/Packet-Binary-Dump-Format.html
*/
@@ -37,11 +35,18 @@
* | length | length of packet excluding this header
* +--------+--------+--------+--------+
*
- * ET types include an additional 32bit microsecond field comming after the
- * length field.
+ * ET types include an additional 32bit microsecond field coming after the
+ * length field. Which is accounted in the length field.
*/
#define MRT_HEADER_SIZE 12
+struct mrt_hdr {
+ u_int32_t timestamp;
+ u_int16_t type;
+ u_int16_t subtype;
+ u_int32_t length;
+} __packed;
+
enum MRT_MSG_TYPES {
MSG_NULL, /* 0 empty msg (deprecated) */
MSG_START, /* 1 sender is starting up */
@@ -70,13 +75,15 @@ enum MRT_MSG_TYPES {
* that are normaly saved as MSG_TABLE_DUMP.
* In most cases this is the format to choose to dump updates et al.
*/
-enum MRT_BGP4MP_TYPES {
+enum MRT_BGP4MP_SUBTYPES {
BGP4MP_STATE_CHANGE, /* state change */
BGP4MP_MESSAGE, /* bgp message */
BGP4MP_ENTRY, /* table dumps (deprecated) */
BGP4MP_SNAPSHOT, /* file name for dump (deprecated) */
+ BGP4MP_MESSAGE_AS4, /* same as BGP4MP_MESSAGE with 4byte AS */
BGP4MP_STATE_CHANGE_AS4,
- BGP4MP_MESSAGE_AS4 /* same as BGP4MP_MESSAGE with 4byte AS */
+ BGP4MP_MESSAGE_LOCAL, /* same as BGP4MP_MESSAGE but for self */
+ BGP4MP_MESSAGE_AS4_LOCAL /* originated updates. Not implemented */
};
/* size of the BGP4MP headers without payload */
@@ -104,6 +111,7 @@ enum MRT_BGP4MP_TYPES {
*
* The source_ip and dest_ip are dependant of the afi type. For IPv6 source_ip
* and dest_ip are both 16 bytes long.
+ * For the AS4 types the source_as and dest_as numbers are both 4 bytes long.
*
* Payload of a BGP4MP_STATE_CHANGE packet:
*
@@ -155,6 +163,98 @@ enum MRT_BGP4MP_TYPES {
*/
/*
+ * New MRT dump format MSG_TABLE_DUMP_V2, the dump is implemented with
+ * sub-tables for peers and NLRI entries just use the index into the peer
+ * table.
+ */
+enum MRT_DUMP_V2_SUBTYPES {
+ MRT_DUMP_V2_PEER_INDEX_TABLE=1,
+ MRT_DUMP_V2_RIB_IPV4_UNICAST=2,
+ MRT_DUMP_V2_RIB_IPV4_MULTICAST=3,
+ MRT_DUMP_V2_RIB_IPV6_UNICAST=4,
+ MRT_DUMP_V2_RIB_IPV6_MULTICAST=5,
+ MRT_DUMP_V2_RIB_GENERIC=6
+};
+
+/*
+ * Format of the MRT_DUMP_V2_PEER_INDEX_TABLE:
+ * If there is no view_name, view_name_len must be set to 0
+ *
+ * +--------+--------+--------+--------+
+ * | collector_bgp_id |
+ * +--------+--------+--------+--------+
+ * | view_name_len | view_name
+ * +--------+--------+--------+--------+
+ * view_name (variable) ... |
+ * +--------+--------+--------+--------+
+ * | peer_count | peer_entries
+ * +--------+--------+--------+--------+
+ * peer_entries (variable) ...
+ * +--------+--------+--------+--------+
+ *
+ * The format of a peer_entry is the following:
+ *
+ * +--------+
+ * | type |
+ * +--------+--------+--------+--------+
+ * | peer_bgp_id |
+ * +--------+--------+--------+--------+
+ * | peer_ip_addr (variable) |
+ * +--------+--------+--------+--------+
+ * | peer_as (variable) |
+ * +--------+--------+--------+--------+
+ *
+ * The message is packed a bit strangely. The type byte defines what size
+ * the peer addr and peer AS have.
+ * The position of a peer in the PEER_INDEX_TABLE is used as the index for
+ * the other messages.
+ */
+#define MRT_DUMP_V2_PEER_BIT_I 0x1 /* set for IPv6 addrs */
+#define MRT_DUMP_V2_PEER_BIT_A 0x2 /* set for 32 bits AS number */
+
+/*
+ * AFI/SAFI specific RIB Subtypes are special to save a few bytes.
+ *
+ * +--------+--------+--------+--------+
+ * | seq_num |
+ * +--------+--------+--------+--------+
+ * | plen | prefix (variable)
+ * +--------+--------+--------+--------+
+ * | #entry | rib entries (variable)
+ * +--------+--------+--------+--------+
+ *
+ * The RIB_GENERIC subtype is needed for the less common AFI/SAFI pairs
+ *
+ * +--------+--------+--------+--------+
+ * | seq_num |
+ * +--------+--------+--------+--------+
+ * | AFI | SAFI | NLRI
+ * +--------+--------+--------+--------+
+ * NLRI (variable) ...
+ * +--------+--------+--------+--------+
+ * | #entry | rib entries (variable)
+ * +--------+--------+--------+--------+
+ */
+
+/*
+ * The RIB entries have the following form.
+ *
+ * +--------+--------+
+ * | peer index |
+ * +--------+--------+--------+--------+
+ * | originated_time |
+ * +--------+--------+--------+--------+
+ * | attr_len | bgp_attrs
+ * +--------+--------+--------+--------+
+ * bgp_attrs (variable) ...
+ * +--------+--------+--------+--------+
+ *
+ * Some BGP path attributes need special encoding:
+ * - the AS_PATH attribute MUST be encoded as 4-Byte AS
+ * - the MP_REACH_NLRI only consists of the nexthop len and nexthop address
+ */
+
+/*
* Format for routing table dumps in "old" mrt format.
* Type MSG_TABLE_DUMP and subtype is AFI_IPv4 (1) for IPv4 and AFI_IPv6 (2)
* for IPv6. In the IPv6 case prefix and peer_ip are both 16 bytes long.
@@ -182,8 +282,14 @@ enum MRT_BGP4MP_TYPES {
* The status field is unused and should be set to 1.
*/
+enum MRT_DUMP_SUBTYPES {
+ MRT_DUMP_AFI_IP=1,
+ MRT_DUMP_AFI_IPv6=2
+};
+
/* size of the dump header until attr_len */
#define MRT_DUMP_HEADER_SIZE 22
+#define MRT_DUMP_HEADER_SIZE_V6 46
/*
* OLD MRT message headers. These structs are here for completion but
@@ -192,7 +298,7 @@ enum MRT_BGP4MP_TYPES {
* Only for bgp messages (type 5, 9 and 10)
* Nota bene for bgp dumps MSG_PROTOCOL_BGP4MP should be used.
*/
-enum MRT_BGP_TYPES {
+enum MRT_BGP_SUBTYPES {
MSG_BGP_NULL,
MSG_BGP_UPDATE, /* raw update packet (contains both withdraws
and announcements) */
@@ -221,10 +327,8 @@ enum MRT_BGP_TYPES {
*
* For IPv6 the type is MSG_PROTOCOL_BGP4PLUS and the subtype remains
* MSG_BGP_UPDATE. The source_ip and dest_ip are again extended to 16 bytes.
- */
-
-/*
- * For subtype MSG_BGP_STATECHANGE (for all BGP types or just for the
+ *
+ * For subtype MSG_BGP_STATE_CHANGE (for all BGP types or just for the
* MSG_PROTOCOL_BGP4PLUS case? Unclear.)
*
* +--------+--------+--------+--------+
@@ -235,7 +339,7 @@ enum MRT_BGP_TYPES {
* | new_state |
* +--------+--------+
*
- * State are defined in RFC 1771.
+ * States are defined in RFC 1771/4271.
*/
/*
@@ -251,66 +355,4 @@ enum MRT_BGP_TYPES {
* terminated ... | 0 |
* +--------+--------+--------+
*/
-
-#define MRT_FILE_LEN 512
-enum mrt_type {
- MRT_NONE,
- MRT_TABLE_DUMP,
- MRT_TABLE_DUMP_MP,
- MRT_ALL_IN,
- MRT_ALL_OUT,
- MRT_UPDATE_IN,
- MRT_UPDATE_OUT
-};
-
-enum mrt_state {
- MRT_STATE_RUNNING,
- MRT_STATE_OPEN,
- MRT_STATE_REOPEN,
- MRT_STATE_REMOVE
-};
-
-struct mrt {
- char rib[PEER_DESCR_LEN];
- struct msgbuf wbuf;
- LIST_ENTRY(mrt) entry;
- u_int32_t peer_id;
- u_int32_t group_id;
- enum mrt_type type;
- enum mrt_state state;
- u_int16_t seqnum;
-};
-
-struct mrt_config {
- struct mrt conf;
- char name[MRT_FILE_LEN]; /* base file name */
- char file[MRT_FILE_LEN]; /* actual file name */
- time_t ReopenTimer;
- time_t ReopenTimerInterval;
-};
-
-#define MRT2MC(x) ((struct mrt_config *)(x))
-#define MRT_MAX_TIMEOUT 7200
-
-struct peer;
-struct prefix;
-struct rib_entry;
-
-/* prototypes */
-void mrt_dump_bgp_msg(struct mrt *, void *, u_int16_t,
- struct peer *);
-void mrt_dump_state(struct mrt *, u_int16_t, u_int16_t,
- struct peer *);
-void mrt_clear_seq(void);
-void mrt_dump_upcall(struct rib_entry *, void *);
-void mrt_dump_done(void *);
-void mrt_write(struct mrt *);
-void mrt_clean(struct mrt *);
-void mrt_init(struct imsgbuf *, struct imsgbuf *);
-int mrt_timeout(struct mrt_head *);
-void mrt_reconfigure(struct mrt_head *);
-void mrt_handler(struct mrt_head *);
-struct mrt *mrt_get(struct mrt_head *, struct mrt *);
-int mrt_mergeconfig(struct mrt_head *, struct mrt_head *);
-
#endif
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