Compare commits
3 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
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47dd2ee79f | ||
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f13e087a9f | ||
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ec5e6b64ee |
11
LICENSE.txt
Normal file
11
LICENSE.txt
Normal file
@@ -0,0 +1,11 @@
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Copyright (c) 2018, Cloudflare. All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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@@ -67,47 +67,47 @@ var (
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73: "FQDN Capability",
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}
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BgpAttributes = map[int]string{
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0: "Reserved",
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ATTRIBUTE_ORIGIN: "ORIGIN",
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ATTRIBUTE_ASPATH: "AS_PATH",
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ATTRIBUTE_NEXTHOP: "NEXT_HOP",
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ATTRIBUTE_MED: "MULTI_EXIT_DISC",
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ATTRIBUTE_LOCPREF: "LOCAL_PREF",
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6: "ATOMIC_AGGREGATE",
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7: "AGGREGATOR",
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0: "Reserved",
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ATTRIBUTE_ORIGIN: "ORIGIN",
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ATTRIBUTE_ASPATH: "AS_PATH",
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ATTRIBUTE_NEXTHOP: "NEXT_HOP",
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ATTRIBUTE_MED: "MULTI_EXIT_DISC",
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ATTRIBUTE_LOCPREF: "LOCAL_PREF",
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6: "ATOMIC_AGGREGATE",
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7: "AGGREGATOR",
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ATTRIBUTE_COMMUNITIES: "COMMUNITY",
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9: "ORIGINATOR_ID",
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10: "CLUSTER_LIST",
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11: "DPA (deprecated)",
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12: "ADVERTISER (historic) (deprecated)",
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13: "RCID_PATH / CLUSTER_ID (Historic) (deprecated)",
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ATTRIBUTE_REACH: "MP_REACH_NLRI",
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ATTRIBUTE_UNREACH: "MP_UNREACH_NLRI",
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16: "EXTENDED COMMUNITIES",
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ATTRIBUTE_AS4PATH: "AS4_PATH",
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18: "AS4_AGGREGATOR",
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19: "SAFI Specific Attribute (SSA) (deprecated)",
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20: "Connector Attribute (deprecated)",
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21: "AS_PATHLIMIT (deprecated)",
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22: "PMSI_TUNNEL",
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23: "Tunnel Encapsulation Attribute",
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24: "Traffic Engineering",
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25: "IPv6 Address Specific Extended Community",
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26: "AIGP",
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27: "PE Distinguisher Labels",
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28: "BGP Entropy Label Capability Attribute (deprecated)",
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29: "BGP-LS Attribute",
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30: "Deprecated",
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31: "Deprecated",
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32: "LARGE_COMMUNITY",
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33: "BGPsec_Path",
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34: "BGP Community Container Attribute",
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40: "BGP Prefix-SID",
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128: "ATTR_SET",
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129: "Deprecated",
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241: "Deprecated",
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242: "Deprecated",
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243: "Deprecated",
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9: "ORIGINATOR_ID",
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10: "CLUSTER_LIST",
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11: "DPA (deprecated)",
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12: "ADVERTISER (historic) (deprecated)",
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13: "RCID_PATH / CLUSTER_ID (Historic) (deprecated)",
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ATTRIBUTE_REACH: "MP_REACH_NLRI",
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ATTRIBUTE_UNREACH: "MP_UNREACH_NLRI",
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16: "EXTENDED COMMUNITIES",
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ATTRIBUTE_AS4PATH: "AS4_PATH",
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18: "AS4_AGGREGATOR",
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19: "SAFI Specific Attribute (SSA) (deprecated)",
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20: "Connector Attribute (deprecated)",
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21: "AS_PATHLIMIT (deprecated)",
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22: "PMSI_TUNNEL",
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23: "Tunnel Encapsulation Attribute",
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24: "Traffic Engineering",
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25: "IPv6 Address Specific Extended Community",
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26: "AIGP",
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27: "PE Distinguisher Labels",
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28: "BGP Entropy Label Capability Attribute (deprecated)",
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29: "BGP-LS Attribute",
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30: "Deprecated",
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31: "Deprecated",
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32: "LARGE_COMMUNITY",
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33: "BGPsec_Path",
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34: "BGP Community Container Attribute",
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40: "BGP Prefix-SID",
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128: "ATTR_SET",
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129: "Deprecated",
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241: "Deprecated",
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242: "Deprecated",
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243: "Deprecated",
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}
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Afi = map[string]uint16{
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"ipv4": AFI_IPV4,
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350
rib/rib_lc.go
350
rib/rib_lc.go
@@ -1,350 +0,0 @@
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package rib
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import (
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"github.com/cloudflare/fgbgp/messages"
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"github.com/cloudflare/fgbgp/mrt"
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"github.com/lspgn/lctrie"
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"net"
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"sync"
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"time"
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//"fmt"
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)
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type LcRib struct {
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PrefixTable *lctrie.Trie
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Prefix6Table *lctrie.Trie
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SyncPrefixTable *sync.RWMutex
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SyncPrefix6Table *sync.RWMutex
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Countv4 int
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Countv6 int
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}
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func NewLcRib() *LcRib {
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return &LcRib{
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PrefixTable: lctrie.New(),
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Prefix6Table: lctrie.New(),
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SyncPrefixTable: &sync.RWMutex{},
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SyncPrefix6Table: &sync.RWMutex{},
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}
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}
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type dumpWalkArgs struct {
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f WalkMrt
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peerid uint16
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iter uint32
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isv6 bool
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afi uint16
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safi byte
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curtime time.Time
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}
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type Walk func(net.IPNet, *messages.BGPMessageUpdate) bool
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type WalkMrt func(*mrt.MrtTableDumpV2_Rib) bool
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func (args *dumpWalkArgs) dumpWalk(prefix net.IPNet, msg *messages.BGPMessageUpdate) bool {
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dump := mrt.NewMrtTableDumpV2_RibAfiSafi(args.iter, args.afi, args.safi, messages.NLRI_IPPrefix{Prefix: prefix}, args.curtime)
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dump.AddEntry(args.peerid, args.curtime, msg.PathAttributes)
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var stop bool
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if args.f != nil {
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stop = args.f(dump)
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}
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args.iter++
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return stop
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}
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func (rib *LcRib) DumpMrt(peerid uint16, f WalkMrt, ts time.Time) {
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args := dumpWalkArgs{
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f: f,
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peerid: peerid,
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afi: messages.AFI_IPV4,
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safi: messages.SAFI_UNICAST,
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curtime: ts,
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}
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rib.Walk(args.dumpWalk, args.isv6)
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args.afi = messages.AFI_IPV6
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args.isv6 = true
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rib.Walk(args.dumpWalk, args.isv6)
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}
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func (rib *LcRib) chooseTableByType(ip net.IP) (*lctrie.Trie, *sync.RWMutex) {
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if ip.To4() != nil {
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return rib.PrefixTable, rib.SyncPrefixTable
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} else if ip.To16() != nil {
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return rib.Prefix6Table, rib.SyncPrefix6Table
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} else {
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return nil, nil
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}
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}
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type walkArgs struct {
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f Walk
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isv6 bool
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}
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func (rib *LcRib) GetCounts(afisafi messages.AfiSafi) int {
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if afisafi.Afi == messages.AFI_IPV4 {
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return rib.Countv4
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} else if afisafi.Afi == messages.AFI_IPV6 {
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return rib.Countv6
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}
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return 0
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}
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func (args *walkArgs) walkFunc(b []byte, p byte, item interface{}) bool {
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prefix := ConvertBytesToPrefix(b, p, args.isv6)
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conv, ok := item.(*messages.BGPMessageUpdate)
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var stop bool
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if ok && args.f != nil {
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stop = args.f(prefix, conv)
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}
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return stop
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}
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func (rib *LcRib) Walk(f Walk, isv6 bool) {
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args := walkArgs{
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f: f,
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isv6: isv6,
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}
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if !isv6 {
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rib.SyncPrefixTable.RLock()
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rib.PrefixTable.ExploreFromRoot(args.walkFunc)
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rib.SyncPrefixTable.RUnlock()
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} else {
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rib.SyncPrefix6Table.RLock()
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rib.Prefix6Table.ExploreFromRoot(args.walkFunc)
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rib.SyncPrefix6Table.RUnlock()
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}
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}
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func (rib *LcRib) chooseTableByTypePrefix(prefix net.IPNet) (*lctrie.Trie, *sync.RWMutex) {
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return rib.chooseTableByType(prefix.IP)
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}
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func (rib *LcRib) LookupPrefix(prefix net.IPNet, exact bool) (net.IPNet, *messages.BGPMessageUpdate) {
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table, sync := rib.chooseTableByTypePrefix(prefix)
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var pconv net.IPNet
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if table == nil || sync == nil {
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return pconv, nil
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}
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b, p := ConvertPrefixToBytes(prefix)
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var bb []byte
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var pp byte
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var i interface{}
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sync.RLock()
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var isv6 bool
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if prefix.IP.To4() == nil && prefix.IP.To16() != nil {
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isv6 = true
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}
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if !exact {
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bb, pp, i = table.Get(b, p)
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pconv = ConvertBytesToPrefix(bb, pp, isv6)
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} else {
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i = table.GetExact(b, p)
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pconv = prefix
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}
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sync.RUnlock()
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update, ok := i.(*messages.BGPMessageUpdate)
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if ok {
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return pconv, update
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}
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return pconv, nil
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}
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func (rib *LcRib) Lookup(ip net.IP) (net.IPNet, *messages.BGPMessageUpdate) {
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var mask net.IPMask
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if ip.To4() != nil {
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mask = net.CIDRMask(32, 32)
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} else if ip.To16() != nil {
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mask = net.CIDRMask(128, 128)
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}
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prefix := net.IPNet{
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IP: ip,
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Mask: mask,
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}
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return rib.LookupPrefix(prefix, false)
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}
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func ConvertBytesToPrefix(b []byte, p byte, ipv6 bool) net.IPNet {
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var newip []byte
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var mask net.IPMask
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var size int
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if ipv6 {
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size = 16
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} else {
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size = 4
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}
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if p == 0 {
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mask = net.CIDRMask(8*len(b), size*8)
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} else {
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modb := b[len(b)-1]
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b[len(b)-1] = (modb >> (8 - p)) << (8 - p)
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mask = net.CIDRMask(8*(len(b)-1)+int(p), size*8)
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}
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if size-len(b) > 0 {
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newip = append(b, make([]byte, size-len(b))...)
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} else {
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newip = append(b)
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}
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return net.IPNet{IP: newip, Mask: mask}
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}
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func ConvertPrefixToBytes(prefix net.IPNet) ([]byte, byte) {
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var ipbytes []byte
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var bytescopy net.IP
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bytescopy = make([]byte, len(prefix.IP))
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copy(bytescopy, prefix.IP)
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if bytescopy.To4() != nil {
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ipbytes = bytescopy.To4()
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} else if prefix.IP.To16() != nil {
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ipbytes = bytescopy.To16()
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}
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if ipbytes != nil {
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s, _ := prefix.Mask.Size()
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if s == 0 {
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return []byte{}, 0
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}
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cut := s / 8
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if s%8 != 0 {
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cut += 1
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}
|
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ipbytes := ipbytes[0:cut]
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s %= 8
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return ipbytes, byte(s)
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}
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return nil, 0
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}
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|
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func ConvertNLRIToBytes(nlri messages.NLRI) ([]byte, byte) {
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ipprefix, ok := nlri.(messages.NLRI_IPPrefix)
|
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if ok {
|
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return ConvertPrefixToBytes(ipprefix.Prefix)
|
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} else {
|
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return nil, 0
|
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}
|
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|
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}
|
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|
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func RemoveFromNLRI(nlri messages.NLRI, message *messages.BGPMessageUpdate) {
|
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newnlri := make([]messages.NLRI, 0)
|
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for i := range message.NLRI {
|
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if !nlri.Equals(message.NLRI[i]) {
|
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newnlri = append(newnlri, message.NLRI[i])
|
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}
|
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}
|
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if len(newnlri) != len(message.NLRI) {
|
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message.NLRI = newnlri
|
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}
|
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|
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newnlri = make([]messages.NLRI, 0)
|
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for i := range message.PathAttributes {
|
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switch pa := message.PathAttributes[i].(type) {
|
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case messages.BGPAttribute_MP_REACH:
|
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for j := range pa.NLRI {
|
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if !nlri.Equals(pa.NLRI[j]) {
|
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newnlri = append(newnlri, pa.NLRI[j])
|
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}
|
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}
|
||||
if len(newnlri) != len(pa.NLRI) {
|
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pa.NLRI = newnlri
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (rib *LcRib) addPrefix(nlri messages.NLRI, trie *lctrie.Trie, message *messages.BGPMessageUpdate, count *int) {
|
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b, l := ConvertNLRIToBytes(nlri)
|
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//fmt.Printf("Converted %v %v\n", b, l)
|
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if b != nil {
|
||||
|
||||
val := trie.GetExact(b, byte(l%8))
|
||||
if val != nil {
|
||||
valupdate, ok := val.(*messages.BGPMessageUpdate)
|
||||
if ok && valupdate != message {
|
||||
RemoveFromNLRI(nlri, valupdate)
|
||||
}
|
||||
} else {
|
||||
(*count)++
|
||||
}
|
||||
trie.Insert(b, byte(l%8), message)
|
||||
}
|
||||
}
|
||||
|
||||
func (rib *LcRib) delPrefix(nlri messages.NLRI, trie *lctrie.Trie, count *int) int {
|
||||
b, l := ConvertNLRIToBytes(nlri)
|
||||
//fmt.Printf("Converted %v %v\n", b, l)
|
||||
if b != nil {
|
||||
|
||||
val := trie.GetExact(b, byte(l%8))
|
||||
if val != nil {
|
||||
valupdate, ok := val.(*messages.BGPMessageUpdate)
|
||||
if ok {
|
||||
RemoveFromNLRI(nlri, valupdate)
|
||||
}
|
||||
(*count)--
|
||||
}
|
||||
return trie.Remove(b, byte(l%8))
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
func (rib *LcRib) UpdateRib(message *messages.BGPMessageUpdate) {
|
||||
if message == nil {
|
||||
return
|
||||
}
|
||||
rib.SyncPrefixTable.Lock()
|
||||
for i := range message.NLRI {
|
||||
//fmt.Printf("Adding %v (%v/%v)\n", message.NLRI[i], i+1, len(message.NLRI))
|
||||
rib.addPrefix(message.NLRI[i], rib.PrefixTable, message, &rib.Countv4)
|
||||
}
|
||||
rib.SyncPrefixTable.Unlock()
|
||||
|
||||
rib.SyncPrefixTable.Lock()
|
||||
for i := range message.WithdrawnRoutes {
|
||||
//fmt.Printf("Remove %v\n", message.WidthdrawnRoutes[i])
|
||||
rib.delPrefix(message.WithdrawnRoutes[i], rib.PrefixTable, &rib.Countv4)
|
||||
}
|
||||
message.WithdrawnRoutes = make([]messages.NLRI, 0)
|
||||
rib.SyncPrefixTable.Unlock()
|
||||
|
||||
for i := range message.PathAttributes {
|
||||
switch pa := message.PathAttributes[i].(type) {
|
||||
case messages.BGPAttribute_MP_REACH:
|
||||
rib.SyncPrefix6Table.Lock()
|
||||
for j := range pa.NLRI {
|
||||
//fmt.Printf("Adding %v\n", pa.NLRI[j])
|
||||
rib.addPrefix(pa.NLRI[j], rib.Prefix6Table, message, &rib.Countv6)
|
||||
}
|
||||
rib.SyncPrefix6Table.Unlock()
|
||||
|
||||
case messages.BGPAttribute_MP_UNREACH:
|
||||
rib.SyncPrefix6Table.Lock()
|
||||
for j := range pa.NLRI {
|
||||
//fmt.Printf("Remove %v\n", pa.NLRI[j])
|
||||
rib.delPrefix(pa.NLRI[j], rib.Prefix6Table, &rib.Countv6)
|
||||
}
|
||||
pa.NLRI = make([]messages.NLRI, 0)
|
||||
rib.SyncPrefix6Table.Unlock()
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user