2021-03-29 20:45:21 +00:00
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/*
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* BIRD -- The BGP Monitoring Protocol (BMP)
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*
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* (c) 2020 Akamai Technologies, Inc. (Pawel Maslanka, pmaslank@akamai.com)
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/**
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* DOC: BGP Monitoring Protocol (BMP)
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*
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* Supported standards:
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* o RFC 7854 - BMP standard
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*
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* TODO:
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* - Support Peer Distinguisher ID in Per-Peer Header
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* - Support peer type as RD Instance in Peer Type field of Per-Peer Header.
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* Currently, there are supported Global and Local Instance Peer types
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* - Support corresponding FSM event code during send PEER DOWN NOTIFICATION
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* - Support DE_CONFIGURED PEER DOWN REASON code in PEER DOWN NOTIFICATION message
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* - If connection with BMP collector will lost then we don't establish connection again
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* - Set Peer Type by its a global and local-scope IP address
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2023-04-20 14:13:58 +00:00
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*
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* The BMP session is managed by a simple state machine with three states: Idle
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* (!started, !sk), Connect (!started, sk active), and Established (started). It
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2023-05-30 13:52:01 +00:00
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* has three events: connect successful (Connect -> Established), socket error
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2023-04-20 14:13:58 +00:00
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* (any -> Idle), and connect timeout (Idle/Connect -> Connect, resetting the
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* TCP socket).
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2021-03-29 20:45:21 +00:00
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*/
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#include "proto/bmp/bmp.h"
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#include "proto/bmp/map.h"
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include <limits.h>
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#include "nest/cli.h"
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#include "filter/filter.h"
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#include "proto/bgp/bgp.h"
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#include "sysdep/unix/unix.h"
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#include "lib/event.h"
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#include "lib/ip.h"
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#include "lib/lists.h"
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#include "lib/resource.h"
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#include "lib/unaligned.h"
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#include "nest/iface.h"
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#include "nest/route.h"
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2023-06-08 02:56:41 +00:00
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// List of BMP instances
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static list STATIC_LIST_INIT(bmp_proto_list);
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2021-03-29 20:45:21 +00:00
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2023-08-18 01:53:58 +00:00
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#define HASH_PEER_KEY(n) n->bgp
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#define HASH_PEER_NEXT(n) n->next
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#define HASH_PEER_EQ(b1,b2) b1 == b2
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#define HASH_PEER_FN(b) ptr_hash(b)
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#define BMP_STREAM_KEY_POLICY 0x100
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#define HASH_STREAM_KEY(n) n->bgp, n->key
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#define HASH_STREAM_NEXT(n) n->next
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#define HASH_STREAM_EQ(b1,k1,b2,k2) b1 == b2 && k1 == k2
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#define HASH_STREAM_FN(b,k) ptr_hash(b) ^ u32_hash(k)
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#define HASH_TABLE_KEY(n) n->table
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#define HASH_TABLE_NEXT(n) n->next
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#define HASH_TABLE_EQ(t1,t2) t1 == t2
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#define HASH_TABLE_FN(t) ptr_hash(t)
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2021-03-29 20:45:21 +00:00
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/* BMP Common Header [RFC 7854 - Section 4.1] */
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enum bmp_version {
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BMP_VER_UNUSED = 0, // Version 0 is reserved and MUST NOT be sent
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BMP_VERSION_1 = 1, // Version 1 was used by draft version of RFC 7854
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BMP_VERSION_2 = 2, // Version 2 was used by draft version of RFC 7854
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BMP_VERSION_3 = 3 // Version 3 is used by all messages defined in RFC 7854
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};
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enum bmp_message_type {
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BMP_ROUTE_MONITOR = 0, // Route Monitoring
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BMP_STATS_REPORT = 1, // Statistics Report
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BMP_PEER_DOWN_NOTIF = 2, // Peer Down Notification
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BMP_PEER_UP_NOTIF = 3, // Peer Up Notification
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BMP_INIT_MSG = 4, // Initiation Message
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BMP_TERM_MSG = 5, // Termination Message
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BMP_ROUTE_MIRROR_MSG = 6 // Route Mirroring Message
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};
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// Defines size of padding when IPv4 address is going to be put into field
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// which can accept also IPv6 address
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#define BMP_PADDING_IP4_ADDR_SIZE 12
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enum bmp_peer_type {
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BMP_PEER_TYPE_GLOBAL_INSTANCE = 0,
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BMP_PEER_TYPE_RD_INSTANCE = 1,
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BMP_PEER_TYPE_LOCAL_INSTANCE = 2
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};
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2024-12-01 19:56:53 +00:00
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#define BMP_PEER_FLAG_V_IPV6 (1 << 7)
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#define BMP_PEER_FLAG_L_POLICY (1 << 6)
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#define BMP_PEER_FLAG_A_NO_AS4 (1 << 5)
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struct bmp_peer_hdr_info {
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ip_addr address;
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u32 as;
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u32 id;
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bool global;
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bool policy;
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bool no_as4;
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btime timestamp;
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2021-03-29 20:45:21 +00:00
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};
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/* BMP Information TLV header [RFC 7854 - Section 4.4] */
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// Total size of Type and Length fields of Information TLV Header without
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// variable part
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#define BMP_INFO_TLV_FIX_SIZE 4
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enum bmp_info_tlv_type {
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BMP_INFO_TLV_TYPE_STRING = 0, // String
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BMP_INFO_TLV_TYPE_SYS_DESCR = 1, // SysDescr
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BMP_INFO_TLV_TYPE_SYS_NAME = 2 // SysName
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};
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/* BMP Peer Up Notification message header [RFC 7854 - Section 4.10] */
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// Total size of all fields of Peer Up Notification message except variable part
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#define BMP_PEER_UP_NOTIF_MSG_FIX_SIZE 20
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enum bmp_peer_down_notif_reason {
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// The local system closed the session
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BMP_PEER_DOWN_REASON_LOCAL_BGP_NOTIFICATION = 1,
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// The local system closed the session
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BMP_PEER_DOWN_REASON_LOCAL_NO_NOTIFICATION = 2,
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// The remote system closed the session with a notification message
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BMP_PEER_DOWN_REASON_REMOTE_BGP_NOTIFICATION = 3,
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// The remote system closed the session without a notification message
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BMP_PEER_DOWN_REASON_REMOTE_NO_NOTIFICATION = 4,
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// Information for this peer will no longer be sent to the monitoring station
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// for configuration reasons
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BMP_PEER_DOWN_REASON_PEER_DE_CONFIGURED = 5
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};
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2024-09-17 14:27:54 +00:00
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struct bmp_peer_down_info {
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u8 reason;
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u8 fsm_code;
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u8 err_code;
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u8 err_subcode;
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const byte *data;
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int length;
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};
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2021-03-29 20:45:21 +00:00
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/* BMP Termination Message [RFC 7854 - Section 4.5] */
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#define BMP_TERM_INFO_TYPE_SIZE 2
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enum bmp_term_info_type {
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BMP_TERM_INFO_STRING = 0, // The Information field contains string
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BMP_TERM_INFO_REASON = 1, // The Information field contains 2-byte reason code
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};
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// 2-byte code in the Information field
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#define BMP_TERM_REASON_CODE_SIZE 2
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enum bmp_term_reason {
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BMP_TERM_REASON_ADM = 0, // Session administratively closed
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BMP_TERM_REASON_UNK = 1, // Unspecified reason
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BMP_TERM_REASON_OOR = 2, // Out of resources
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BMP_TERM_REASON_DUP = 3, // Redundant connection
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BMP_TERM_REASON_PERM = 4, // Session permanently administratively closed
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};
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// Size of Information Length field in Termination Message header
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#define BMP_TERM_INFO_LEN_FIELD_SIZE 2
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// Default chunk size request when memory allocation
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#define DEFAULT_MEM_BLOCK_SIZE 4096
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2023-04-20 14:13:58 +00:00
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// Initial delay for connection to the BMP collector
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#define CONNECT_INIT_TIME (200 MS)
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2021-03-29 20:45:21 +00:00
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// Timeout for connection to the BMP collector retry
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2023-04-20 14:13:58 +00:00
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#define CONNECT_RETRY_TIME (10 S)
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2021-03-29 20:45:21 +00:00
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#define IP4_MAX_TTL 255
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2021-03-28 02:30:11 +00:00
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2024-09-17 14:27:54 +00:00
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#define bmp_buffer_need(b, sz) ASSERT_DIE((b)->pos + (sz) <= (b)->end)
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2021-03-28 02:30:11 +00:00
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2024-09-17 14:27:54 +00:00
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// Idea for following macros has been taken from |proto/mrt/mrt.c|
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#define BMP_DEFINE_PUT_FUNC(S, T) \
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static inline void \
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bmp_put_##S(buffer *b, const T x) \
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{ \
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bmp_buffer_need(b, sizeof(T)); \
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put_##S(b->pos, x); \
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b->pos += sizeof(T); \
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}
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2021-03-28 02:30:11 +00:00
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2024-09-17 14:27:54 +00:00
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BMP_DEFINE_PUT_FUNC(u8, u8)
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BMP_DEFINE_PUT_FUNC(u16, u16)
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BMP_DEFINE_PUT_FUNC(u32, u32)
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BMP_DEFINE_PUT_FUNC(u64, u64)
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BMP_DEFINE_PUT_FUNC(ip4, ip4_addr)
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BMP_DEFINE_PUT_FUNC(ip6, ip6_addr)
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2021-03-28 02:30:11 +00:00
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2024-09-17 14:27:54 +00:00
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static inline void
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bmp_put_data(buffer *b, const void *src, const size_t len)
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{
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ASSERT_DIE(b->pos + len <= b->end);
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memcpy(b->pos, src, len);
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b->pos += len;
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}
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static inline buffer
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bmp_default_buffer(struct bmp_proto *p)
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{
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return (buffer) {
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.start = p->msgbuf,
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.pos = p->msgbuf,
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.end = p->msgbuf + sizeof p->msgbuf,
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};
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}
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2021-03-28 02:30:11 +00:00
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2023-04-20 14:13:58 +00:00
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static void bmp_connected(struct birdsock *sk);
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static void bmp_sock_err(sock *sk, int err);
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static void bmp_close_socket(struct bmp_proto *p);
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2021-03-29 20:45:21 +00:00
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2021-03-28 02:30:11 +00:00
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static void
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2021-03-28 13:13:23 +00:00
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bmp_send_peer_up_notif_msg(struct bmp_proto *p, const struct bgp_proto *bgp,
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2023-05-30 13:52:01 +00:00
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const byte *tx_data, const size_t tx_data_size,
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const byte *rx_data, const size_t rx_data_size);
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2021-03-29 20:45:21 +00:00
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2023-08-21 02:20:32 +00:00
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static void bmp_route_monitor_end_of_rib(struct bmp_proto *p, struct bmp_stream *bs);
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2024-09-17 14:27:54 +00:00
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// Stores TX data
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struct bmp_tx_buffer {
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struct bmp_tx_buffer *next;
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byte *pos;
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byte data[];
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};
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#define bmp_tx_remains(b) (((byte *) (b) + page_size) - (b)->pos)
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/* A dummy resource to accurately show memory pages allocated for pending TX */
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struct bmp_tx_resource {
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resource r;
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struct bmp_proto *p;
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};
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static void
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bmp_tx_resource_free(resource *r UNUSED) {}
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static void
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bmp_tx_resource_dump(resource *r UNUSED) {}
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static struct resmem
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bmp_tx_resource_memsize(resource *r)
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{
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struct bmp_proto *p = SKIP_BACK(struct bmp_tx_resource, r, r)->p;
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return (struct resmem) {
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.effective = p->tx_pending_count * page_size,
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.overhead = sizeof(struct bmp_tx_resource),
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};
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}
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static struct resclass bmp_tx_resource_class = {
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.name = "BMP TX buffers",
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.size = sizeof(struct bmp_tx_resource),
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.free = bmp_tx_resource_free,
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.dump = bmp_tx_resource_dump,
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.memsize = bmp_tx_resource_memsize,
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2021-03-29 20:45:21 +00:00
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};
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static void
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bmp_common_hdr_serialize(buffer *stream, const enum bmp_message_type type, const u32 data_size)
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{
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bmp_put_u8(stream, BMP_VERSION_3);
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bmp_put_u32(stream, BMP_COMMON_HDR_SIZE + data_size);
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bmp_put_u8(stream, type);
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}
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2021-03-28 02:30:11 +00:00
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static void
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2021-03-29 20:45:21 +00:00
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bmp_info_tlv_hdr_serialize(buffer *stream, const enum bmp_info_tlv_type type,
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2021-03-28 02:30:11 +00:00
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const char *str)
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2021-03-29 20:45:21 +00:00
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{
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2021-03-28 02:30:11 +00:00
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size_t str_len = strlen(str);
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2023-05-30 13:52:01 +00:00
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str_len = MIN(str_len, MIB_II_STR_LEN);
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2021-03-29 20:45:21 +00:00
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bmp_put_u16(stream, type);
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2021-03-28 02:30:11 +00:00
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bmp_put_u16(stream, str_len);
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bmp_put_data(stream, str, str_len);
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2021-03-29 20:45:21 +00:00
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}
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// Serializes BMP Initiation message header [RFC 7854 - Section 4.3]
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2021-03-28 02:30:11 +00:00
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static void
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2021-03-29 20:45:21 +00:00
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bmp_init_msg_serialize(buffer *stream, const char *sys_descr, const char *sys_name)
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{
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const size_t sys_descr_len = strlen(sys_descr);
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const size_t sys_name_len = strlen(sys_name);
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// We include MIB-II sysDescr and sysName in BMP INIT MSG so that's why
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// allocated 2x BMP_INFO_TLV_FIX_SIZE memory pool size
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const size_t data_size = (2 * BMP_INFO_TLV_FIX_SIZE) + sys_descr_len + sys_name_len;
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2024-09-17 14:27:54 +00:00
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2021-03-29 20:45:21 +00:00
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bmp_buffer_need(stream, BMP_COMMON_HDR_SIZE + data_size);
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bmp_common_hdr_serialize(stream, BMP_INIT_MSG, data_size);
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2021-03-28 02:30:11 +00:00
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bmp_info_tlv_hdr_serialize(stream, BMP_INFO_TLV_TYPE_SYS_DESCR, sys_descr);
|
|
|
|
bmp_info_tlv_hdr_serialize(stream, BMP_INFO_TLV_TYPE_SYS_NAME, sys_name);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2021-03-28 02:30:11 +00:00
|
|
|
static void
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_schedule_tx_packet(struct bmp_proto *p, const byte *payload, size_t size)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
ASSERT(p->started);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
while (size)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
if (!p->tx_last || !bmp_tx_remains(p->tx_last))
|
|
|
|
{
|
|
|
|
if (p->tx_pending_count >= p->tx_pending_limit)
|
|
|
|
return ev_schedule(p->tx_overflow_event);
|
|
|
|
|
|
|
|
p->tx_pending_count++;
|
|
|
|
|
|
|
|
struct bmp_tx_buffer *btb = alloc_page();
|
|
|
|
btb->pos = btb->data;
|
|
|
|
btb->next = NULL;
|
|
|
|
|
|
|
|
if (p->tx_last)
|
|
|
|
{
|
|
|
|
ASSERT_DIE(!p->tx_last->next);
|
|
|
|
p->tx_last->next = btb;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
ASSERT_DIE(p->tx_pending_count == 1);
|
|
|
|
|
|
|
|
p->tx_last = btb;
|
|
|
|
|
|
|
|
if (!p->tx_pending)
|
|
|
|
p->tx_pending = btb;
|
|
|
|
}
|
|
|
|
|
|
|
|
size_t cpylen = bmp_tx_remains(p->tx_last);
|
|
|
|
if (size < cpylen)
|
|
|
|
cpylen = size;
|
|
|
|
|
|
|
|
memcpy(p->tx_last->pos, payload, cpylen);
|
|
|
|
p->tx_last->pos += cpylen;
|
|
|
|
|
|
|
|
payload += cpylen;
|
|
|
|
size -= cpylen;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!p->sk->tbuf && !ev_active(p->tx_ev))
|
2021-03-28 14:41:53 +00:00
|
|
|
ev_schedule(p->tx_ev);
|
2024-09-17 14:27:54 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_tx_buffer_free(struct bmp_proto *p, struct bmp_tx_buffer *btb)
|
|
|
|
{
|
|
|
|
if (btb == p->tx_last)
|
|
|
|
{
|
|
|
|
p->tx_last = NULL;
|
|
|
|
ASSERT_DIE(!p->tx_pending_count);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
2024-09-17 14:27:54 +00:00
|
|
|
|
|
|
|
free_page(btb);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2021-03-28 14:41:53 +00:00
|
|
|
static void
|
|
|
|
bmp_fire_tx(void *p_)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2021-03-28 14:41:53 +00:00
|
|
|
struct bmp_proto *p = p_;
|
2023-06-08 03:10:05 +00:00
|
|
|
|
|
|
|
if (!p->started)
|
|
|
|
return;
|
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
int cnt = 0;
|
|
|
|
for (struct bmp_tx_buffer *btb; btb = p->tx_pending; )
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
ASSERT_DIE(!p->sk->tbuf);
|
|
|
|
|
|
|
|
p->sk->tbuf = btb->data;
|
|
|
|
u64 sz = btb->pos - btb->data;
|
|
|
|
|
|
|
|
p->tx_sent += sz;
|
|
|
|
p->tx_sent_total += sz;
|
|
|
|
|
|
|
|
if (p->tx_pending == p->tx_last)
|
|
|
|
p->tx_last = NULL;
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
p->tx_pending = btb->next;
|
|
|
|
p->tx_pending_count--;
|
2023-04-20 15:14:45 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
if (sk_send(p->sk, sz) <= 0)
|
2023-04-20 15:14:45 +00:00
|
|
|
return;
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
p->sk->tbuf = NULL;
|
|
|
|
bmp_tx_buffer_free(p, btb);
|
|
|
|
|
|
|
|
if (cnt++ > 1024)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2021-03-28 14:41:53 +00:00
|
|
|
if (!ev_active(p->tx_ev))
|
2024-09-17 14:27:54 +00:00
|
|
|
ev_schedule(p->tx_ev);
|
2021-03-29 20:45:21 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_tx(struct birdsock *sk)
|
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
struct bmp_proto *p = sk->data;
|
|
|
|
|
|
|
|
struct bmp_tx_buffer *btb = SKIP_BACK(struct bmp_tx_buffer, data, sk->tbuf);
|
|
|
|
bmp_tx_buffer_free(p, btb);
|
|
|
|
|
|
|
|
sk->tbuf = NULL;
|
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_fire_tx(sk->data);
|
|
|
|
}
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/* We need RX hook just to accept socket close events */
|
|
|
|
static int
|
|
|
|
bmp_rx(struct birdsock *sk UNUSED, uint size UNUSED)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
return 0;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2021-03-28 13:36:59 +00:00
|
|
|
static inline void
|
|
|
|
bmp_put_ipa(buffer *stream, const ip_addr addr)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2021-03-28 13:36:59 +00:00
|
|
|
bmp_put_ip6(stream, ipa_is_ip4(addr) ?
|
|
|
|
ip6_build(0,0,0, ipa_to_u32(addr)) :
|
|
|
|
ipa_to_ip6(addr));
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2023-05-01 01:35:21 +00:00
|
|
|
bmp_put_bgp_hdr(buffer *stream, const u8 msg_type, const u16 msg_length)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-05-01 01:35:21 +00:00
|
|
|
bmp_buffer_need(stream, BGP_HEADER_LENGTH);
|
|
|
|
|
|
|
|
memset(stream->pos, 0xff, BGP_HDR_MARKER_LENGTH);
|
|
|
|
stream->pos += BGP_HDR_MARKER_LENGTH;
|
|
|
|
|
|
|
|
bmp_put_u16(stream, msg_length);
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_put_u8(stream, msg_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* bmp_per_peer_hdr_serialize - serializes Per-Peer Header
|
|
|
|
*
|
2023-08-18 01:53:58 +00:00
|
|
|
* @is_post_policy: indicate the message reflects the post-policy Adj-RIB-In
|
2021-03-29 20:45:21 +00:00
|
|
|
* @peer_addr: the remote IP address associated with the TCP session
|
|
|
|
* @peer_as: the Autonomous System number of the peer
|
|
|
|
* @peer_bgp_id: the BGP Identifier of the peer
|
|
|
|
* @ts_sec: the time in seconds when the encapsulated routes were received
|
|
|
|
* @ts_usec: the time in microseconds when the encapsulated routes were received
|
|
|
|
*/
|
|
|
|
static void
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_per_peer_hdr_serialize(buffer *stream, const struct bmp_peer_hdr_info *peer)
|
|
|
|
{
|
|
|
|
// TODO: ATM we do not support BMP_PEER_TYPE_RD_INSTANCE
|
|
|
|
u8 peer_type = peer->global ?
|
|
|
|
BMP_PEER_TYPE_GLOBAL_INSTANCE :
|
|
|
|
BMP_PEER_TYPE_LOCAL_INSTANCE;
|
|
|
|
|
|
|
|
u8 peer_flags =
|
|
|
|
(ipa_is_ip6(peer->address) ? BMP_PEER_FLAG_V_IPV6 : 0) |
|
|
|
|
(peer->policy ? BMP_PEER_FLAG_L_POLICY : 0) |
|
|
|
|
(peer->no_as4 ? BMP_PEER_FLAG_A_NO_AS4 : 0);
|
|
|
|
|
|
|
|
u32 ts_sec = peer->timestamp TO_S;
|
|
|
|
u32 ts_usec = peer->timestamp - (ts_sec S);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
|
|
|
bmp_put_u8(stream, peer_type);
|
|
|
|
bmp_put_u8(stream, peer_flags);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_put_u64(stream, 0); // Not supported peer distinguisher
|
|
|
|
bmp_put_ipa(stream, peer->address);
|
|
|
|
bmp_put_u32(stream, peer->as);
|
|
|
|
bmp_put_u32(stream, peer->id);
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_put_u32(stream, ts_sec);
|
|
|
|
bmp_put_u32(stream, ts_usec);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* [4.6] Route Monitoring */
|
2024-09-17 14:27:54 +00:00
|
|
|
static byte *
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_route_monitor_msg_serialize(struct bmp_proto *p, const struct bmp_peer_hdr_info *peer,
|
|
|
|
byte *update_msg, size_t update_msg_length)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
ASSERT_DIE(update_msg < &p->msgbuf[sizeof p->msgbuf]);
|
|
|
|
|
|
|
|
buffer stream;
|
|
|
|
STACK_BUFFER_INIT(stream, BMP_PER_PEER_HDR_SIZE + BMP_COMMON_HDR_SIZE);
|
|
|
|
|
2024-12-01 19:56:53 +00:00
|
|
|
const size_t data_size = BMP_PER_PEER_HDR_SIZE + update_msg_length;
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_common_hdr_serialize(&stream, BMP_ROUTE_MONITOR, data_size);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_per_peer_hdr_serialize(&stream, peer);
|
2024-09-17 14:27:54 +00:00
|
|
|
|
|
|
|
size_t hdr_sz = stream.pos - stream.start;
|
|
|
|
ASSERT_DIE(update_msg >= &p->msgbuf[hdr_sz]);
|
|
|
|
|
|
|
|
byte *begin = &update_msg[-hdr_sz];
|
|
|
|
memcpy(begin, stream.start, hdr_sz);
|
|
|
|
return begin;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_peer_up_notif_msg_serialize(buffer *stream, const struct bmp_peer_hdr_info *peer,
|
|
|
|
const ip_addr local_addr, const u16 local_port, const u16 remote_port,
|
|
|
|
const byte *sent_msg, const size_t sent_msg_length,
|
|
|
|
const byte *recv_msg, const size_t recv_msg_length)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-05-01 01:35:21 +00:00
|
|
|
const size_t data_size =
|
|
|
|
BMP_PER_PEER_HDR_SIZE + BMP_PEER_UP_NOTIF_MSG_FIX_SIZE +
|
2023-05-30 13:52:01 +00:00
|
|
|
BGP_HEADER_LENGTH + sent_msg_length + BGP_HEADER_LENGTH + recv_msg_length;
|
2023-05-01 01:35:21 +00:00
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_buffer_need(stream, BMP_COMMON_HDR_SIZE + data_size);
|
|
|
|
bmp_common_hdr_serialize(stream, BMP_PEER_UP_NOTIF, data_size);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_per_peer_hdr_serialize(stream, peer);
|
2024-09-17 14:27:54 +00:00
|
|
|
|
2021-03-28 13:36:59 +00:00
|
|
|
bmp_put_ipa(stream, local_addr);
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_put_u16(stream, local_port);
|
|
|
|
bmp_put_u16(stream, remote_port);
|
2023-05-30 13:52:01 +00:00
|
|
|
bmp_put_bgp_hdr(stream, PKT_OPEN, BGP_HEADER_LENGTH + sent_msg_length);
|
|
|
|
bmp_put_data(stream, sent_msg, sent_msg_length);
|
|
|
|
bmp_put_bgp_hdr(stream, PKT_OPEN, BGP_HEADER_LENGTH + recv_msg_length);
|
|
|
|
bmp_put_data(stream, recv_msg, recv_msg_length);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_peer_down_notif_msg_serialize(buffer *stream, const struct bmp_peer_hdr_info *peer,
|
|
|
|
const struct bmp_peer_down_info *info)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
const size_t data_size = BMP_PER_PEER_HDR_SIZE + 1 +
|
|
|
|
(((info->reason == BMP_PEER_DOWN_REASON_LOCAL_BGP_NOTIFICATION) ||
|
|
|
|
(info->reason == BMP_PEER_DOWN_REASON_REMOTE_BGP_NOTIFICATION)) ? (BGP_HEADER_LENGTH + 2 + info->length) :
|
|
|
|
(info->reason == BMP_PEER_DOWN_REASON_LOCAL_NO_NOTIFICATION) ? 2 : 0);
|
|
|
|
|
|
|
|
bmp_buffer_need(stream, BMP_COMMON_HDR_SIZE + data_size);
|
|
|
|
bmp_common_hdr_serialize(stream, BMP_PEER_DOWN_NOTIF, data_size);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_per_peer_hdr_serialize(stream, peer);
|
2024-09-17 14:27:54 +00:00
|
|
|
|
|
|
|
bmp_put_u8(stream, info->reason);
|
|
|
|
|
|
|
|
switch (info->reason)
|
|
|
|
{
|
|
|
|
case BMP_PEER_DOWN_REASON_LOCAL_BGP_NOTIFICATION:
|
|
|
|
case BMP_PEER_DOWN_REASON_REMOTE_BGP_NOTIFICATION:;
|
|
|
|
uint bgp_msg_length = BGP_HEADER_LENGTH + 2 + info->length;
|
|
|
|
bmp_buffer_need(stream, bgp_msg_length);
|
|
|
|
bmp_put_bgp_hdr(stream, bgp_msg_length, PKT_NOTIFICATION);
|
|
|
|
bmp_put_u8(stream, info->err_code);
|
|
|
|
bmp_put_u8(stream, info->err_subcode);
|
|
|
|
bmp_put_data(stream, info->data, info->length);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BMP_PEER_DOWN_REASON_LOCAL_NO_NOTIFICATION:
|
|
|
|
bmp_put_u16(stream, info->fsm_code);
|
|
|
|
break;
|
|
|
|
}
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* BMP tables
|
|
|
|
*/
|
|
|
|
|
|
|
|
static struct bmp_table *
|
|
|
|
bmp_find_table(struct bmp_proto *p, struct rtable *tab)
|
|
|
|
{
|
|
|
|
return HASH_FIND(p->table_map, HASH_TABLE, tab);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct bmp_table *
|
|
|
|
bmp_add_table(struct bmp_proto *p, struct rtable *tab)
|
|
|
|
{
|
|
|
|
struct bmp_table *bt = mb_allocz(p->p.pool, sizeof(struct bmp_table));
|
|
|
|
bt->table = tab;
|
|
|
|
rt_lock_table(bt->table);
|
|
|
|
|
|
|
|
HASH_INSERT(p->table_map, HASH_TABLE, bt);
|
|
|
|
|
|
|
|
struct channel_config cc = {
|
|
|
|
.name = "monitor",
|
|
|
|
.channel = &channel_basic,
|
|
|
|
.table = tab->config,
|
|
|
|
.in_filter = FILTER_REJECT,
|
|
|
|
.net_type = tab->addr_type,
|
|
|
|
.ra_mode = RA_ANY,
|
|
|
|
.bmp_hack = 1,
|
|
|
|
};
|
|
|
|
|
|
|
|
bt->channel = proto_add_channel(&p->p, &cc);
|
|
|
|
channel_set_state(bt->channel, CS_UP);
|
|
|
|
|
|
|
|
return bt;
|
|
|
|
}
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
static void
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_remove_table(struct bmp_proto *p, struct bmp_table *bt)
|
|
|
|
{
|
|
|
|
channel_set_state(bt->channel, CS_FLUSHING);
|
|
|
|
channel_set_state(bt->channel, CS_DOWN);
|
|
|
|
proto_remove_channel(&p->p, bt->channel);
|
|
|
|
|
|
|
|
HASH_REMOVE(p->table_map, HASH_TABLE, bt);
|
|
|
|
|
|
|
|
rt_unlock_table(bt->table);
|
|
|
|
bt->table = NULL;
|
|
|
|
|
|
|
|
mb_free(bt);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct bmp_table *bmp_get_table(struct bmp_proto *p, struct rtable *tab)
|
|
|
|
{ return bmp_find_table(p, tab) ?: bmp_add_table(p, tab); }
|
|
|
|
|
|
|
|
static inline void bmp_lock_table(struct bmp_proto *p UNUSED, struct bmp_table *bt)
|
|
|
|
{ bt->uc++; }
|
|
|
|
|
|
|
|
static inline void bmp_unlock_table(struct bmp_proto *p, struct bmp_table *bt)
|
|
|
|
{ bt->uc--; if (!bt->uc) bmp_remove_table(p, bt); }
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* BMP streams
|
|
|
|
*/
|
|
|
|
|
|
|
|
static inline u32 bmp_stream_key(u32 afi, bool policy)
|
|
|
|
{ return afi ^ (policy ? BMP_STREAM_KEY_POLICY : 0); }
|
|
|
|
|
|
|
|
static inline u32 bmp_stream_afi(struct bmp_stream *bs)
|
|
|
|
{ return bs->key & ~BMP_STREAM_KEY_POLICY; }
|
|
|
|
|
|
|
|
static inline bool bmp_stream_policy(struct bmp_stream *bs)
|
|
|
|
{ return !!(bs->key & BMP_STREAM_KEY_POLICY); }
|
|
|
|
|
|
|
|
static struct bmp_stream *
|
|
|
|
bmp_find_stream(struct bmp_proto *p, const struct bgp_proto *bgp, u32 afi, bool policy)
|
|
|
|
{
|
|
|
|
return HASH_FIND(p->stream_map, HASH_STREAM, bgp, bmp_stream_key(afi, policy));
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct bmp_stream *
|
|
|
|
bmp_add_stream(struct bmp_proto *p, struct bmp_peer *bp, u32 afi, bool policy, struct rtable *tab, struct bgp_channel *sender)
|
|
|
|
{
|
|
|
|
struct bmp_stream *bs = mb_allocz(p->p.pool, sizeof(struct bmp_stream));
|
|
|
|
bs->bgp = bp->bgp;
|
|
|
|
bs->key = bmp_stream_key(afi, policy);
|
|
|
|
|
|
|
|
add_tail(&bp->streams, &bs->n);
|
|
|
|
HASH_INSERT(p->stream_map, HASH_STREAM, bs);
|
|
|
|
|
|
|
|
bs->table = bmp_get_table(p, tab);
|
|
|
|
bmp_lock_table(p, bs->table);
|
|
|
|
|
|
|
|
bs->sender = sender;
|
2023-08-21 02:20:32 +00:00
|
|
|
bs->sync = false;
|
2023-08-18 01:53:58 +00:00
|
|
|
|
|
|
|
return bs;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_remove_stream(struct bmp_proto *p, struct bmp_stream *bs)
|
|
|
|
{
|
|
|
|
rem_node(&bs->n);
|
|
|
|
HASH_REMOVE(p->stream_map, HASH_STREAM, bs);
|
|
|
|
|
|
|
|
bmp_unlock_table(p, bs->table);
|
|
|
|
bs->table = NULL;
|
|
|
|
|
|
|
|
mb_free(bs);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* BMP peers
|
|
|
|
*/
|
|
|
|
|
|
|
|
static struct bmp_peer *
|
|
|
|
bmp_find_peer(struct bmp_proto *p, const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
return HASH_FIND(p->peer_map, HASH_PEER, bgp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct bmp_peer *
|
|
|
|
bmp_add_peer(struct bmp_proto *p, struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
struct bmp_peer *bp = mb_allocz(p->p.pool, sizeof(struct bmp_peer));
|
|
|
|
bp->bgp = bgp;
|
|
|
|
|
|
|
|
init_list(&bp->streams);
|
|
|
|
|
|
|
|
HASH_INSERT(p->peer_map, HASH_PEER, bp);
|
|
|
|
|
|
|
|
struct bgp_channel *c;
|
|
|
|
BGP_WALK_CHANNELS(bgp, c)
|
|
|
|
{
|
|
|
|
if (p->monitoring_rib.in_pre_policy && c->c.in_table)
|
|
|
|
bmp_add_stream(p, bp, c->afi, false, c->c.in_table, c);
|
|
|
|
|
|
|
|
if (p->monitoring_rib.in_post_policy && c->c.table)
|
|
|
|
bmp_add_stream(p, bp, c->afi, true, c->c.table, c);
|
|
|
|
}
|
|
|
|
|
|
|
|
return bp;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_remove_peer(struct bmp_proto *p, struct bmp_peer *bp)
|
|
|
|
{
|
|
|
|
struct bmp_stream *bs, *bs_next;
|
|
|
|
WALK_LIST_DELSAFE(bs, bs_next, bp->streams)
|
|
|
|
bmp_remove_stream(p, bs);
|
|
|
|
|
|
|
|
HASH_REMOVE(p->peer_map, HASH_PEER, bp);
|
|
|
|
|
|
|
|
mb_free(bp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2023-08-21 02:20:32 +00:00
|
|
|
bmp_peer_up_(struct bmp_proto *p, struct bgp_proto *bgp, bool sync,
|
2023-05-01 01:35:21 +00:00
|
|
|
const byte *tx_open_msg, uint tx_open_length,
|
|
|
|
const byte *rx_open_msg, uint rx_open_length)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-06-08 02:56:41 +00:00
|
|
|
if (!p->started)
|
2023-05-01 01:35:21 +00:00
|
|
|
return;
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
struct bmp_peer *bp = bmp_find_peer(p, bgp);
|
|
|
|
if (bp)
|
|
|
|
return;
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
TRACE(D_STATES, "Peer up for %s", bgp->p.name);
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
bp = bmp_add_peer(p, bgp);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-05-01 01:35:21 +00:00
|
|
|
bmp_send_peer_up_notif_msg(p, bgp, tx_open_msg, tx_open_length, rx_open_msg, rx_open_length);
|
|
|
|
|
2023-08-21 02:20:32 +00:00
|
|
|
/*
|
|
|
|
* We asssume peer_up() notifications are received before any route
|
|
|
|
* notifications from that peer. Therefore, peers established after BMP
|
|
|
|
* session coould be considered synced with empty RIB.
|
|
|
|
*/
|
|
|
|
if (sync)
|
|
|
|
{
|
|
|
|
struct bmp_stream *bs;
|
|
|
|
WALK_LIST(bs, bp->streams)
|
|
|
|
{
|
|
|
|
bmp_route_monitor_end_of_rib(p, bs);
|
|
|
|
bs->sync = true;
|
|
|
|
}
|
|
|
|
}
|
2023-06-08 02:56:41 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_peer_up(struct bgp_proto *bgp,
|
2023-06-08 02:56:41 +00:00
|
|
|
const byte *tx_open_msg, uint tx_open_length,
|
|
|
|
const byte *rx_open_msg, uint rx_open_length)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p; node *n;
|
|
|
|
WALK_LIST2(p, n, bmp_proto_list, bmp_node)
|
2023-08-21 02:20:32 +00:00
|
|
|
bmp_peer_up_(p, bgp, true, tx_open_msg, tx_open_length, rx_open_msg, rx_open_length);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_peer_init(struct bmp_proto *p, struct bgp_proto *bgp)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-05-01 01:35:21 +00:00
|
|
|
struct bgp_conn *conn = bgp->conn;
|
|
|
|
|
|
|
|
if (!conn || (conn->state != BS_ESTABLISHED) ||
|
|
|
|
!conn->local_open_msg || !conn->remote_open_msg)
|
|
|
|
return;
|
|
|
|
|
2023-08-21 02:20:32 +00:00
|
|
|
bmp_peer_up_(p, bgp, false, conn->local_open_msg, conn->local_open_length,
|
2023-06-08 02:56:41 +00:00
|
|
|
conn->remote_open_msg, conn->remote_open_length);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
|
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
static const struct birdsock *
|
|
|
|
bmp_get_birdsock(const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
if (bgp->conn && bgp->conn->sk)
|
|
|
|
return bgp->conn->sk;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct birdsock *
|
|
|
|
bmp_get_birdsock_ext(const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
const struct birdsock *sk = bmp_get_birdsock(bgp);
|
|
|
|
if (sk != NULL)
|
|
|
|
return sk;
|
|
|
|
|
|
|
|
if (bgp->incoming_conn.sk)
|
|
|
|
{
|
|
|
|
sk = bgp->incoming_conn.sk;
|
|
|
|
}
|
|
|
|
else if (bgp->outgoing_conn.sk)
|
|
|
|
{
|
|
|
|
sk = bgp->outgoing_conn.sk;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sk;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct bgp_caps *
|
|
|
|
bmp_get_bgp_remote_caps(const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
if (bgp->conn && bgp->conn->remote_caps)
|
|
|
|
return bgp->conn->remote_caps;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct bgp_caps *
|
|
|
|
bmp_get_bgp_remote_caps_ext(const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
const struct bgp_caps *remote_caps = bmp_get_bgp_remote_caps(bgp);
|
|
|
|
if (remote_caps != NULL)
|
|
|
|
return remote_caps;
|
|
|
|
|
|
|
|
if (bgp->incoming_conn.remote_caps)
|
|
|
|
{
|
|
|
|
remote_caps = bgp->incoming_conn.remote_caps;
|
|
|
|
}
|
|
|
|
else if (bgp->outgoing_conn.remote_caps)
|
|
|
|
{
|
|
|
|
remote_caps = bgp->outgoing_conn.remote_caps;
|
|
|
|
}
|
|
|
|
|
|
|
|
return remote_caps;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool
|
|
|
|
bmp_is_peer_global_instance(const struct bgp_proto *bgp)
|
|
|
|
{
|
|
|
|
return (bgp->cf->peer_type != BGP_PT_EXTERNAL &&
|
|
|
|
bgp->cf->peer_type != BGP_PT_INTERNAL)
|
|
|
|
? (bgp->local_as != bgp->remote_as)
|
|
|
|
: (bgp->cf->peer_type == BGP_PT_EXTERNAL);
|
|
|
|
}
|
|
|
|
|
2021-03-28 02:30:11 +00:00
|
|
|
static void
|
2021-03-28 13:13:23 +00:00
|
|
|
bmp_send_peer_up_notif_msg(struct bmp_proto *p, const struct bgp_proto *bgp,
|
2023-05-30 13:52:01 +00:00
|
|
|
const byte *tx_data, const size_t tx_data_size,
|
|
|
|
const byte *rx_data, const size_t rx_data_size)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
ASSERT(p->started);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2021-03-28 02:30:11 +00:00
|
|
|
const struct birdsock *sk = bmp_get_birdsock_ext(bgp);
|
2024-09-17 14:27:54 +00:00
|
|
|
if (!sk)
|
|
|
|
{
|
|
|
|
log(L_WARN "%s: No BGP socket", p->p.name);
|
|
|
|
return;
|
|
|
|
}
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2024-12-01 19:56:53 +00:00
|
|
|
struct bmp_peer_hdr_info peer = {
|
|
|
|
.address = bgp->remote_ip,
|
|
|
|
.as = bgp->remote_as,
|
|
|
|
.id = bgp->remote_id,
|
|
|
|
.global = bmp_is_peer_global_instance(bgp),
|
|
|
|
.policy = false, // Hardcoded pre-policy Adj-RIB-In
|
|
|
|
.timestamp = 0, // No timestamp provided
|
|
|
|
};
|
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
buffer payload = bmp_default_buffer(p);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_peer_up_notif_msg_serialize(&payload, &peer, sk->saddr, sk->sport, sk->dport,
|
|
|
|
tx_data, tx_data_size, rx_data, rx_data_size);
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_schedule_tx_packet(p, payload.start, payload.pos - payload.start);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
static void
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_route_monitor_put_update(struct bmp_proto *p, struct bmp_stream *bs, byte *data, size_t length, btime timestamp)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-08-18 01:53:58 +00:00
|
|
|
struct bgp_proto *bgp = bs->bgp;
|
2024-09-17 14:27:54 +00:00
|
|
|
|
2024-12-01 19:56:53 +00:00
|
|
|
struct bmp_peer_hdr_info peer = {
|
|
|
|
.address = bgp->remote_ip,
|
|
|
|
.as = bgp->remote_as,
|
|
|
|
.id = bgp->remote_id,
|
|
|
|
.global = bmp_is_peer_global_instance(bgp),
|
|
|
|
.policy = bmp_stream_policy(bs),
|
|
|
|
.timestamp = timestamp,
|
|
|
|
};
|
|
|
|
|
|
|
|
const byte *start = bmp_route_monitor_msg_serialize(p, &peer, data, length);
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_schedule_tx_packet(p, start, (data - start) + length);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-08-01 15:56:56 +00:00
|
|
|
static void
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_route_monitor_notify(struct bmp_proto *p, struct bmp_stream *bs,
|
|
|
|
const net_addr *n, const struct rte *new, const struct rte_src *src)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
byte *bufend = &p->msgbuf[sizeof p->msgbuf];
|
|
|
|
byte *begin = bufend - BGP_MAX_EXT_MSG_LENGTH;
|
|
|
|
byte *end = bgp_bmp_encode_rte(bs->sender, begin, bufend, n, new, src);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-08-18 13:39:08 +00:00
|
|
|
btime delta_t = new ? current_time() - new->lastmod : 0;
|
|
|
|
btime timestamp = current_real_time() - delta_t;
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
if (end)
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_route_monitor_put_update(p, bs, begin, end - begin, timestamp);
|
2023-08-18 01:53:58 +00:00
|
|
|
else
|
|
|
|
log(L_WARN "%s: Cannot encode update for %N", p->p.name, n);
|
2023-06-08 02:56:41 +00:00
|
|
|
}
|
2021-03-28 13:13:23 +00:00
|
|
|
|
2021-03-29 02:43:04 +00:00
|
|
|
static void
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_route_monitor_end_of_rib(struct bmp_proto *p, struct bmp_stream *bs)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-08-18 01:53:58 +00:00
|
|
|
TRACE(D_PACKETS, "Sending END-OF-RIB for %s.%s", bs->bgp->p.name, bs->sender->c.name);
|
2023-06-08 02:56:41 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
byte *rx_end_payload = p->msgbuf + BMP_PER_PEER_HDR_SIZE + BMP_COMMON_HDR_SIZE;
|
2023-08-18 01:53:58 +00:00
|
|
|
byte *pos = bgp_create_end_mark_(bs->sender, rx_end_payload + BGP_HEADER_LENGTH);
|
2023-06-08 02:56:41 +00:00
|
|
|
memset(rx_end_payload + BGP_MSG_HDR_MARKER_POS, 0xff,
|
|
|
|
BGP_MSG_HDR_MARKER_SIZE); // BGP UPDATE MSG marker
|
|
|
|
put_u16(rx_end_payload + BGP_MSG_HDR_LENGTH_POS, pos - rx_end_payload);
|
|
|
|
put_u8(rx_end_payload + BGP_MSG_HDR_TYPE_POS, PKT_UPDATE);
|
|
|
|
|
2023-08-18 13:39:08 +00:00
|
|
|
bmp_route_monitor_put_update(p, bs, rx_end_payload, pos - rx_end_payload, current_real_time());
|
2023-06-08 02:56:41 +00:00
|
|
|
}
|
2021-03-28 13:13:23 +00:00
|
|
|
|
2021-03-28 02:30:11 +00:00
|
|
|
static void
|
2021-03-28 13:13:23 +00:00
|
|
|
bmp_send_peer_down_notif_msg(struct bmp_proto *p, const struct bgp_proto *bgp,
|
2024-09-17 14:27:54 +00:00
|
|
|
const struct bmp_peer_down_info *info)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
ASSERT(p->started);
|
2021-03-28 02:30:11 +00:00
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
const struct bgp_caps *remote_caps = bmp_get_bgp_remote_caps_ext(bgp);
|
2024-12-01 19:56:53 +00:00
|
|
|
|
|
|
|
struct bmp_peer_hdr_info peer = {
|
|
|
|
.address = bgp->remote_ip,
|
|
|
|
.as = bgp->remote_as,
|
|
|
|
.id = bgp->remote_id,
|
|
|
|
.global = bmp_is_peer_global_instance(bgp),
|
|
|
|
.policy = false, // Hardcoded pre-policy Adj-RIB-In
|
|
|
|
.no_as4 = remote_caps ? !remote_caps->as4_support : !bgp->as4_session,
|
|
|
|
.timestamp = 0, // No timestamp provided
|
|
|
|
};
|
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
buffer payload = bmp_default_buffer(p);
|
2024-12-01 19:56:53 +00:00
|
|
|
bmp_peer_down_notif_msg_serialize(&payload, &peer, info);
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_schedule_tx_packet(p, payload.start, payload.pos - payload.start);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
static void
|
|
|
|
bmp_peer_down_(struct bmp_proto *p, const struct bgp_proto *bgp,
|
2023-08-21 23:24:21 +00:00
|
|
|
int err_class, int err_code, int err_subcode, const byte *data, int length)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-06-08 02:56:41 +00:00
|
|
|
if (!p->started)
|
2021-03-29 20:45:21 +00:00
|
|
|
return;
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
struct bmp_peer *bp = bmp_find_peer(p, bgp);
|
|
|
|
if (!bp)
|
|
|
|
return;
|
2023-06-08 02:56:41 +00:00
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
TRACE(D_STATES, "Peer down for %s", bgp->p.name);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
struct bmp_peer_down_info info = {
|
|
|
|
.err_code = err_code,
|
|
|
|
.err_subcode = err_subcode,
|
|
|
|
.data = data,
|
|
|
|
.length = length,
|
|
|
|
};
|
2023-04-20 15:14:45 +00:00
|
|
|
|
2023-08-21 23:24:21 +00:00
|
|
|
switch (err_class)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-08-21 23:24:21 +00:00
|
|
|
case BE_BGP_RX:
|
2024-09-17 14:27:54 +00:00
|
|
|
info.reason = BMP_PEER_DOWN_REASON_REMOTE_BGP_NOTIFICATION;
|
2023-08-21 23:24:21 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case BE_BGP_TX:
|
|
|
|
case BE_AUTO_DOWN:
|
|
|
|
case BE_MAN_DOWN:
|
2024-09-17 14:27:54 +00:00
|
|
|
info.reason = BMP_PEER_DOWN_REASON_LOCAL_BGP_NOTIFICATION;
|
2023-08-21 23:24:21 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2024-09-17 14:27:54 +00:00
|
|
|
info.reason = BMP_PEER_DOWN_REASON_REMOTE_NO_NOTIFICATION;
|
|
|
|
info.length = 0;
|
2023-08-21 23:24:21 +00:00
|
|
|
break;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
2023-08-21 23:24:21 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_send_peer_down_notif_msg(p, bgp, &info);
|
2023-08-18 01:53:58 +00:00
|
|
|
|
|
|
|
bmp_remove_peer(p, bp);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
void
|
2023-08-21 23:24:21 +00:00
|
|
|
bmp_peer_down(const struct bgp_proto *bgp,
|
|
|
|
int err_class, int code, int subcode, const byte *data, int length)
|
2023-06-08 02:56:41 +00:00
|
|
|
{
|
|
|
|
struct bmp_proto *p; node *n;
|
|
|
|
WALK_LIST2(p, n, bmp_proto_list, bmp_node)
|
2023-08-21 23:24:21 +00:00
|
|
|
bmp_peer_down_(p, bgp, err_class, code, subcode, data, length);
|
2023-06-08 02:56:41 +00:00
|
|
|
}
|
|
|
|
|
2021-03-28 02:30:11 +00:00
|
|
|
static void
|
2021-03-28 13:13:23 +00:00
|
|
|
bmp_send_termination_msg(struct bmp_proto *p,
|
2021-03-29 20:45:21 +00:00
|
|
|
const enum bmp_term_reason reason)
|
|
|
|
{
|
|
|
|
const size_t term_msg_hdr_size = BMP_TERM_INFO_TYPE_SIZE
|
|
|
|
+ BMP_TERM_INFO_LEN_FIELD_SIZE
|
|
|
|
+ BMP_TERM_REASON_CODE_SIZE;
|
|
|
|
const size_t term_msg_size = BMP_COMMON_HDR_SIZE + term_msg_hdr_size;
|
2024-09-17 14:27:54 +00:00
|
|
|
buffer stream = bmp_default_buffer(p);
|
|
|
|
bmp_buffer_need(&stream, term_msg_size);
|
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
bmp_common_hdr_serialize(&stream, BMP_TERM_MSG, term_msg_hdr_size);
|
|
|
|
bmp_put_u16(&stream, BMP_TERM_INFO_REASON);
|
|
|
|
bmp_put_u16(&stream, BMP_TERM_REASON_CODE_SIZE); // 2-byte code indication the reason
|
|
|
|
bmp_put_u16(&stream, reason);
|
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
if (p->sk->tbuf)
|
|
|
|
bmp_tx_buffer_free(p, SKIP_BACK(struct bmp_tx_buffer, data, p->sk->tbuf));
|
|
|
|
|
|
|
|
p->sk->tbuf = stream.start;
|
|
|
|
if (sk_send(p->sk, stream.pos - stream.start) < 0)
|
|
|
|
log(L_WARN "%s: Cannot send BMP termination message", p->p.name);
|
|
|
|
p->sk->tbuf = NULL;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
int
|
|
|
|
bmp_preexport(struct channel *C UNUSED, rte *e)
|
|
|
|
{
|
|
|
|
/* Reject non-direct routes */
|
|
|
|
if (e->src->proto != e->sender->proto)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Reject non-BGP routes */
|
|
|
|
if (e->sender->channel != &channel_bgp)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_rt_notify(struct proto *P, struct channel *c, struct network *net,
|
|
|
|
struct rte *new, struct rte *old)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
|
|
|
|
struct bgp_channel *src = (void *) (new ?: old)->sender;
|
|
|
|
struct bgp_proto *bgp = (void *) src->c.proto;
|
|
|
|
bool policy = (c->table == src->c.table);
|
|
|
|
|
2023-08-21 23:24:21 +00:00
|
|
|
/*
|
|
|
|
* We assume that we receive peer_up before the first route and peer_down
|
|
|
|
* synchronously with BGP session close. So if bmp_stream exists, the related
|
|
|
|
* BGP session is up and could be accessed. That may not be true in
|
|
|
|
* multithreaded setup.
|
|
|
|
*/
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
struct bmp_stream *bs = bmp_find_stream(p, bgp, src->afi, policy);
|
|
|
|
if (!bs)
|
|
|
|
return;
|
|
|
|
|
|
|
|
bmp_route_monitor_notify(p, bs, net->n.addr, new, (new ?: old)->src);
|
|
|
|
}
|
|
|
|
|
2023-08-21 02:20:32 +00:00
|
|
|
static void
|
|
|
|
bmp_feed_end(struct channel *c)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = (void *) c->proto;
|
|
|
|
|
|
|
|
struct bmp_table *bt = bmp_find_table(p, c->table);
|
|
|
|
if (!bt)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Unsynced streams are added in one moment during BMP session establishment,
|
|
|
|
* therefore we can assume that all unsynced streams (for given channel)
|
|
|
|
* already received full feed now and are synced.
|
|
|
|
*
|
|
|
|
* TODO: Use more efficent way to find bmp_stream from bmp_table
|
|
|
|
*/
|
|
|
|
|
|
|
|
HASH_WALK(p->stream_map, next, bs)
|
|
|
|
{
|
|
|
|
if ((bs->table == bt) && !bs->sync)
|
|
|
|
{
|
|
|
|
bmp_route_monitor_end_of_rib(p, bs);
|
|
|
|
bs->sync = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
HASH_WALK_END;
|
|
|
|
}
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/**
|
|
|
|
* bmp_startup - enter established state
|
|
|
|
* @p: BMP instance
|
|
|
|
*
|
|
|
|
* The bgp_startup() function is called when the BMP session is established.
|
|
|
|
* It sends initiation and peer up messagages.
|
|
|
|
*/
|
2021-03-29 20:45:21 +00:00
|
|
|
static void
|
2023-04-20 14:13:58 +00:00
|
|
|
bmp_startup(struct bmp_proto *p)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
ASSERT(!p->started);
|
|
|
|
p->started = true;
|
2023-05-31 15:41:53 +00:00
|
|
|
p->sock_err = 0;
|
2021-03-28 13:13:23 +00:00
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
TRACE(D_EVENTS, "BMP session established");
|
2021-03-28 02:30:11 +00:00
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
proto_notify_state(&p->p, PS_UP);
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/* Send initiation message */
|
2024-09-17 14:27:54 +00:00
|
|
|
buffer payload = bmp_default_buffer(p);
|
2023-04-20 14:13:58 +00:00
|
|
|
bmp_init_msg_serialize(&payload, p->sys_descr, p->sys_name);
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_schedule_tx_packet(p, payload.start, payload.pos - payload.start);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/* Send Peer Up messages */
|
2023-05-01 01:35:21 +00:00
|
|
|
struct proto *peer;
|
|
|
|
WALK_LIST(peer, proto_list)
|
|
|
|
if ((peer->proto->class == PROTOCOL_BGP) && (peer->proto_state == PS_UP))
|
2023-06-08 02:56:41 +00:00
|
|
|
bmp_peer_init(p, (struct bgp_proto *) peer);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/**
|
|
|
|
* bmp_down - leave established state
|
|
|
|
* @p: BMP instance
|
|
|
|
*
|
2023-08-18 01:53:58 +00:00
|
|
|
* The bgp_down() function is called when the BMP session fails. The caller is
|
|
|
|
* responsible for changing protocol state.
|
2023-04-20 14:13:58 +00:00
|
|
|
*/
|
|
|
|
static void
|
|
|
|
bmp_down(struct bmp_proto *p)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-20 14:13:58 +00:00
|
|
|
ASSERT(p->started);
|
|
|
|
p->started = false;
|
2024-09-17 14:27:54 +00:00
|
|
|
p->tx_sent = 0;
|
2023-04-20 14:13:58 +00:00
|
|
|
|
|
|
|
TRACE(D_EVENTS, "BMP session closed");
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
/* Unregister existing peer structures */
|
|
|
|
HASH_WALK_DELSAFE(p->peer_map, next, bp)
|
|
|
|
{
|
|
|
|
bmp_remove_peer(p, bp);
|
|
|
|
}
|
|
|
|
HASH_WALK_END;
|
|
|
|
|
|
|
|
/* Removing peers should also remove all streams and tables */
|
|
|
|
ASSERT(!p->peer_map.count && !p->stream_map.count && !p->table_map.count);
|
2023-04-20 14:13:58 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* bmp_connect - initiate an outgoing connection
|
|
|
|
* @p: BMP instance
|
|
|
|
*
|
|
|
|
* The bmp_connect() function creates the socket and initiates an outgoing TCP
|
|
|
|
* connection to the monitoring station. It is called to enter Connect state.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
bmp_connect(struct bmp_proto *p)
|
|
|
|
{
|
|
|
|
ASSERT(!p->started);
|
|
|
|
|
|
|
|
sock *sk = sk_new(p->p.pool);
|
2021-03-29 20:45:21 +00:00
|
|
|
sk->type = SK_TCP_ACTIVE;
|
2023-05-30 15:09:25 +00:00
|
|
|
sk->saddr = p->local_addr;
|
2023-04-20 14:13:58 +00:00
|
|
|
sk->daddr = p->station_ip;
|
|
|
|
sk->dport = p->station_port;
|
2021-03-29 20:45:21 +00:00
|
|
|
sk->ttl = IP4_MAX_TTL;
|
|
|
|
sk->tos = IP_PREC_INTERNET_CONTROL;
|
2023-04-20 14:13:58 +00:00
|
|
|
sk->tx_hook = bmp_connected;
|
|
|
|
sk->err_hook = bmp_sock_err;
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2021-03-28 14:41:53 +00:00
|
|
|
p->sk = sk;
|
|
|
|
sk->data = p;
|
2023-04-20 14:13:58 +00:00
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
TRACE(D_EVENTS, "Connecting to %I port %u", sk->daddr, sk->dport);
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
int rc = sk_open(sk);
|
|
|
|
|
|
|
|
if (rc < 0)
|
|
|
|
sk_log_error(sk, p->p.name);
|
|
|
|
|
|
|
|
tm_start(p->connect_retry_timer, CONNECT_RETRY_TIME);
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-05-30 13:52:01 +00:00
|
|
|
/* BMP connect successful event - switch from Connect to Established state */
|
2023-04-20 14:13:58 +00:00
|
|
|
static void
|
|
|
|
bmp_connected(struct birdsock *sk)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = (void *) sk->data;
|
|
|
|
|
2023-06-08 02:56:41 +00:00
|
|
|
TRACE(D_EVENTS, "Connected");
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
sk->rx_hook = bmp_rx;
|
|
|
|
sk->tx_hook = bmp_tx;
|
|
|
|
tm_stop(p->connect_retry_timer);
|
|
|
|
|
|
|
|
bmp_startup(p);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* BMP socket error event - switch from any state to Idle state */
|
|
|
|
static void
|
|
|
|
bmp_sock_err(sock *sk, int err)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = sk->data;
|
|
|
|
|
2023-05-31 15:41:53 +00:00
|
|
|
p->sock_err = err;
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
if (err)
|
|
|
|
TRACE(D_EVENTS, "Connection lost (%M)", err);
|
|
|
|
else
|
|
|
|
TRACE(D_EVENTS, "Connection closed");
|
|
|
|
|
|
|
|
if (p->started)
|
|
|
|
bmp_down(p);
|
|
|
|
|
|
|
|
bmp_close_socket(p);
|
|
|
|
tm_start(p->connect_retry_timer, CONNECT_RETRY_TIME);
|
2023-08-18 01:53:58 +00:00
|
|
|
|
|
|
|
proto_notify_state(&p->p, PS_START);
|
2023-04-20 14:13:58 +00:00
|
|
|
}
|
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
static void
|
|
|
|
bmp_tx_overflow(void *_p)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = _p;
|
|
|
|
if (p->tx_pending_count < p->tx_pending_limit)
|
|
|
|
return;
|
|
|
|
|
|
|
|
p->sock_err = 0;
|
|
|
|
|
|
|
|
log(L_ERR "%s: Connection stalled", p->p.name);
|
|
|
|
|
|
|
|
if (p->started)
|
|
|
|
bmp_down(p);
|
|
|
|
|
|
|
|
bmp_close_socket(p);
|
|
|
|
tm_start(p->connect_retry_timer, CONNECT_RETRY_TIME);
|
|
|
|
|
|
|
|
proto_notify_state(&p->p, PS_START);
|
|
|
|
}
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
/* BMP connect timeout event - switch from Idle/Connect state to Connect state */
|
|
|
|
static void
|
|
|
|
bmp_connection_retry(timer *t)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = t->data;
|
|
|
|
|
|
|
|
if (p->started)
|
|
|
|
return;
|
|
|
|
|
|
|
|
bmp_close_socket(p);
|
|
|
|
bmp_connect(p);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_close_socket(struct bmp_proto *p)
|
|
|
|
{
|
2024-09-17 14:27:54 +00:00
|
|
|
if (p->sk && p->sk->tbuf)
|
|
|
|
bmp_tx_buffer_free(p, SKIP_BACK(struct bmp_tx_buffer, data, p->sk->tbuf));
|
|
|
|
|
|
|
|
struct bmp_tx_buffer *btb = p->tx_pending;
|
|
|
|
while (btb)
|
|
|
|
{
|
|
|
|
p->tx_pending_count--;
|
|
|
|
|
|
|
|
struct bmp_tx_buffer *next = btb->next;
|
|
|
|
bmp_tx_buffer_free(p, btb);
|
|
|
|
btb = next;
|
|
|
|
}
|
|
|
|
|
|
|
|
p->tx_pending = NULL;
|
|
|
|
|
|
|
|
ASSERT_DIE(!p->tx_last);
|
|
|
|
ASSERT_DIE(!p->tx_pending_count);
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
rfree(p->sk);
|
|
|
|
p->sk = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2023-05-30 15:23:56 +00:00
|
|
|
static void
|
|
|
|
bmp_postconfig(struct proto_config *CF)
|
|
|
|
{
|
|
|
|
struct bmp_config *cf = (void *) CF;
|
|
|
|
|
|
|
|
/* Do not check templates at all */
|
|
|
|
if (cf->c.class == SYM_TEMPLATE)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (ipa_zero(cf->station_ip))
|
|
|
|
cf_error("Station IP address not specified");
|
|
|
|
|
|
|
|
if (!cf->station_port)
|
|
|
|
cf_error("Station port number not specified");
|
|
|
|
}
|
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
/** Configuration handle section **/
|
|
|
|
static struct proto *
|
|
|
|
bmp_init(struct proto_config *CF)
|
|
|
|
{
|
|
|
|
struct proto *P = proto_new(CF);
|
2021-03-28 13:13:23 +00:00
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
struct bmp_config *cf = (void *) CF;
|
2023-05-31 15:41:53 +00:00
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
P->rt_notify = bmp_rt_notify;
|
|
|
|
P->preexport = bmp_preexport;
|
2023-08-21 02:20:32 +00:00
|
|
|
P->feed_end = bmp_feed_end;
|
2023-08-18 01:53:58 +00:00
|
|
|
|
2021-03-28 13:13:23 +00:00
|
|
|
p->cf = cf;
|
2023-05-30 15:09:25 +00:00
|
|
|
p->local_addr = cf->local_addr;
|
2021-03-28 13:13:23 +00:00
|
|
|
p->station_ip = cf->station_ip;
|
|
|
|
p->station_port = cf->station_port;
|
|
|
|
strcpy(p->sys_descr, cf->sys_descr);
|
|
|
|
strcpy(p->sys_name, cf->sys_name);
|
|
|
|
p->monitoring_rib.in_pre_policy = cf->monitoring_rib_in_pre_policy;
|
2023-08-18 01:53:58 +00:00
|
|
|
p->monitoring_rib.in_post_policy = cf->monitoring_rib_in_post_policy;
|
2024-09-17 14:27:54 +00:00
|
|
|
p->tx_pending_limit = cf->tx_pending_limit;
|
2021-03-28 13:13:23 +00:00
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
return P;
|
|
|
|
}
|
|
|
|
|
2023-05-30 15:09:25 +00:00
|
|
|
/**
|
|
|
|
* bmp_start - initialize internal resources of BMP implementation.
|
|
|
|
* NOTE: It does not connect to BMP collector yet.
|
|
|
|
*/
|
2021-03-29 20:45:21 +00:00
|
|
|
static int
|
|
|
|
bmp_start(struct proto *P)
|
|
|
|
{
|
2021-03-28 13:13:23 +00:00
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
|
2023-08-01 15:56:56 +00:00
|
|
|
p->tx_ev = ev_new_init(p->p.pool, bmp_fire_tx, p);
|
2024-09-17 14:27:54 +00:00
|
|
|
p->tx_pending = NULL;
|
|
|
|
p->tx_pending_count = 0;
|
|
|
|
p->tx_overflow_event = ev_new_init(p->p.pool, bmp_tx_overflow, p);
|
2023-04-20 14:13:58 +00:00
|
|
|
p->connect_retry_timer = tm_new_init(p->p.pool, bmp_connection_retry, p, 0, 0);
|
|
|
|
p->sk = NULL;
|
2023-04-18 13:13:24 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
resource *r = ralloc(P->pool, &bmp_tx_resource_class);
|
|
|
|
SKIP_BACK(struct bmp_tx_resource, r, r)->p = p;
|
|
|
|
|
2023-08-18 01:53:58 +00:00
|
|
|
HASH_INIT(p->peer_map, P->pool, 4);
|
|
|
|
HASH_INIT(p->stream_map, P->pool, 4);
|
|
|
|
HASH_INIT(p->table_map, P->pool, 4);
|
2023-04-18 13:13:24 +00:00
|
|
|
|
|
|
|
p->started = false;
|
2023-05-31 15:41:53 +00:00
|
|
|
p->sock_err = 0;
|
2023-06-08 02:56:41 +00:00
|
|
|
add_tail(&bmp_proto_list, &p->bmp_node);
|
2023-04-18 13:13:24 +00:00
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
tm_start(p->connect_retry_timer, CONNECT_INIT_TIME);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
return PS_START;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
bmp_shutdown(struct proto *P)
|
|
|
|
{
|
2021-03-28 13:13:23 +00:00
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
|
2023-04-20 14:13:58 +00:00
|
|
|
if (p->started)
|
|
|
|
{
|
|
|
|
bmp_send_termination_msg(p, BMP_TERM_REASON_ADM);
|
2023-08-18 01:53:58 +00:00
|
|
|
bmp_down(p);
|
2024-09-17 14:27:54 +00:00
|
|
|
bmp_close_socket(p);
|
2023-04-20 14:13:58 +00:00
|
|
|
}
|
2021-03-29 20:45:21 +00:00
|
|
|
|
2023-05-31 15:41:53 +00:00
|
|
|
p->sock_err = 0;
|
2023-06-08 02:56:41 +00:00
|
|
|
rem_node(&p->bmp_node);
|
2021-03-29 20:45:21 +00:00
|
|
|
|
|
|
|
return PS_DOWN;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2023-04-18 16:57:54 +00:00
|
|
|
bmp_reconfigure(struct proto *P, struct proto_config *CF)
|
2021-03-29 20:45:21 +00:00
|
|
|
{
|
2023-04-18 16:57:54 +00:00
|
|
|
struct bmp_proto *p = (void *) P;
|
2023-05-31 15:41:53 +00:00
|
|
|
const struct bmp_config *new = (void *) CF;
|
|
|
|
const struct bmp_config *old = p->cf;
|
2023-04-18 16:57:54 +00:00
|
|
|
|
2023-05-31 15:41:53 +00:00
|
|
|
int needs_restart = bstrcmp(new->sys_descr, old->sys_descr)
|
|
|
|
|| bstrcmp(new->sys_name, old->sys_name)
|
|
|
|
|| !ipa_equal(new->local_addr, old->local_addr)
|
|
|
|
|| !ipa_equal(new->station_ip, old->station_ip)
|
|
|
|
|| (new->station_port != old->station_port)
|
2023-08-18 01:53:58 +00:00
|
|
|
|| (new->monitoring_rib_in_pre_policy != old->monitoring_rib_in_pre_policy)
|
|
|
|
|| (new->monitoring_rib_in_post_policy != old->monitoring_rib_in_post_policy);
|
2023-04-18 16:57:54 +00:00
|
|
|
|
2023-05-31 15:41:53 +00:00
|
|
|
/* If there is any change, restart the protocol */
|
|
|
|
if (needs_restart)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* We must update our copy of configuration ptr */
|
|
|
|
p->cf = new;
|
2023-04-18 16:57:54 +00:00
|
|
|
|
2024-09-17 14:27:54 +00:00
|
|
|
/* Reconfigure tx buffer size limits */
|
|
|
|
p->tx_pending_limit = new->tx_pending_limit;
|
|
|
|
|
2023-04-18 16:57:54 +00:00
|
|
|
return 1;
|
2021-03-29 20:45:21 +00:00
|
|
|
}
|
|
|
|
|
2023-05-31 15:41:53 +00:00
|
|
|
static void
|
|
|
|
bmp_get_status(struct proto *P, byte *buf)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
|
|
|
|
if (P->proto_state == PS_DOWN)
|
|
|
|
bsprintf(buf, "Down");
|
|
|
|
else
|
|
|
|
{
|
|
|
|
const char *state = !p->started ? (!p->sk ? "Idle" : "Connect") : "Established";
|
|
|
|
|
|
|
|
if (!p->sock_err)
|
|
|
|
bsprintf(buf, "%s", state);
|
|
|
|
else
|
|
|
|
bsprintf(buf, "%-14s%s %M", state, "Error:", p->sock_err);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bmp_show_proto_info(struct proto *P)
|
|
|
|
{
|
|
|
|
struct bmp_proto *p = (void *) P;
|
|
|
|
|
|
|
|
if (P->proto_state != PS_DOWN)
|
|
|
|
{
|
|
|
|
cli_msg(-1006, " %-19s %I", "Station address:", p->station_ip);
|
|
|
|
cli_msg(-1006, " %-19s %u", "Station port:", p->station_port);
|
|
|
|
|
|
|
|
if (!ipa_zero(p->local_addr))
|
|
|
|
cli_msg(-1006, " %-19s %I", "Local address:", p->local_addr);
|
|
|
|
|
|
|
|
if (p->sock_err)
|
|
|
|
cli_msg(-1006, " %-19s %M", "Last error:", p->sock_err);
|
2024-09-17 14:27:54 +00:00
|
|
|
|
|
|
|
cli_msg(-1006, " %-19s % 9sB (limit %sB)", "Pending TX:",
|
|
|
|
fmt_order(p->tx_pending_count * (u64) page_size, 1, 10000),
|
|
|
|
fmt_order(p->tx_pending_limit * (u64) page_size, 1, 10000));
|
|
|
|
|
|
|
|
cli_msg(-1006, " %-19s % 9sB", "Session TX:", fmt_order(p->tx_sent, 1, 10000));
|
|
|
|
cli_msg(-1006, " %-19s % 9sB", "Total TX:", fmt_order(p->tx_sent_total, 1, 10000));
|
2023-05-31 15:41:53 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-29 20:45:21 +00:00
|
|
|
struct protocol proto_bmp = {
|
|
|
|
.name = "BMP",
|
2023-04-18 13:09:21 +00:00
|
|
|
.template = "bmp%d",
|
2021-03-29 20:45:21 +00:00
|
|
|
.class = PROTOCOL_BMP,
|
|
|
|
.proto_size = sizeof(struct bmp_proto),
|
|
|
|
.config_size = sizeof(struct bmp_config),
|
2023-05-30 15:23:56 +00:00
|
|
|
.postconfig = bmp_postconfig,
|
2021-03-29 20:45:21 +00:00
|
|
|
.init = bmp_init,
|
|
|
|
.start = bmp_start,
|
|
|
|
.shutdown = bmp_shutdown,
|
|
|
|
.reconfigure = bmp_reconfigure,
|
2023-05-31 15:41:53 +00:00
|
|
|
.get_status = bmp_get_status,
|
|
|
|
.show_proto_info = bmp_show_proto_info,
|
2021-03-29 20:45:21 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
void
|
|
|
|
bmp_build(void)
|
|
|
|
{
|
|
|
|
proto_build(&proto_bmp);
|
|
|
|
}
|