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大名鼎鼎的路由器源码。程序分ZEBRA、OSPFRIP等3个包。程序框架采用一个路由协议一个进程的方式

** Clear cryptographic sequence number when neighbor status is changed
to NSM down.

** Make Summary LSA's origination and refreshment as same as other
type of LSA.

** New OSPF pakcet read method. Now maximum packet length may be 65535
bytes (maximum IP packet length).

** Checking the age of the found LSA and if the LSA is MAXAGE we
should call refresh instead of originate.

** Install multipath information to zebra.

** Fix socket descriptor leak when system call failed.

* Changes in ospf6d

** Whole functionality has been rewritten as new code. new command
"show ipv6 ospf6 spf node", "show ipv6 ospf6 spf tree", "show ipv6
ospf6 spf table" has been added.

** Change to do not send garbage route whose nexthop is not linklocal
address.

** "redistribute ospf6" was generated in "router ospf6" in config
file. It is fixed.

** LSDB sync bug is fixed.

** Fix bug of using unavailable route.

* Changes in vtysh

** route-map and access-list configuration is merged into one
configuration.

** /usr/local/etc/Zebra.conf is integrated configuration file.  "write
memory" in vtysh will write whole configuration to this file.

** When -b option is specified to vtysh, vtysh read
/usr/local/etc/Zebra.conf file then pass the confuguration to proper
protocol daemon.  So make all protocol daemon's configuration file
empty then invoke all daemon.  After that vtysh -b will setup saved
configuration.

zebrastart.sh
=============
/usr/local/sbin/zebra -d
/usr/local/sbin/ripd -d
/usr/local/sbin/ospfd -d
/usr/local/sbin/bgpd -d
/usr/local/bin/vtysh -b

* Changes in zebra-0.89

* Changes in lib

** distribute-list can set all interface's access-list and prefix-list
configuration.

* Changes in ripd

** "show ip protocols" display proper distribute-list settings and
distance settings.

** When metric infinity route received withdraw the route from kernel
immediately it used to be wait garbage collection.

** key-chain can be used for simple password authentication.

** RIPv2 MIB getnext interface bug is fixed.

* Changes in vtysh

** --with-libpam enable PAM authentication for vtysh.

** Now vtysh read vtysh.conf.  This file should be
${SYSCONFDIR}/etc/vtysh.conf for security reason.  Usually it is
/usr/local/etc/vtysh.conf.

** "username WORD nopassword" command is added to vtysh.

* Chagees in ospfd

** NBMA interface support is added.

** OSPF area is sorted by area ID.

** New implementation of OSPF refreesh.

** OSPF-MIB read function is partly added.

* Changes in bgpd

** When the peering is done by ebgp-multihop, nexthop is looked up
like IBGP routes.

** "show ip mbgp" commands are changed to "show ip bgp ipv4
multicast".

** New terminal commands are added.
  "show ip bgp ipv4 (unicast|multicast) filter-list WORD"
  "show ip bgp ipv4 (unicast|multicast) community"
  "show ip bgp ipv4 (unicast|multicast) community-list WORD"
  "show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"

** MBGP soft-reconfiguration command is added.
  "clear ip bgp x.x.x.x ipv4 (unicast|multicast) in"
  "clear ip bgp x.x.x.x ipv4 (unicast|multicast) out"
  "clear ip bgp x.x.x.x ipv4 (unicast|multicast) soft"
  "clear ip bgp <1-65535> ipv4 (unicast|multicast) in"
  "clear ip bgp <1-65535> ipv4 (unicast|multicast) out"
  "clear ip bgp <1-65535> ipv4 (unicast|multicast) soft"
  "clear ip bgp * ipv4 (unicast|multicast) in"
  "clear ip bgp * ipv4 (unicast|multicast) out"
  "clear ip bgp * ipv4 (unicast|multicast) soft"

** MED related commands are added.
  "bgp deterministic-med"
  "bgp bestpath med confed"
  "bgp bestpath med missing-as-worst"

** "bgp default local-preference" command is added.

** BGP confederation peer's routes are passed to zebra like IBGP route.

** Community match command is added.
  "show ip bgp community <val>"
  "show ip bgp community <val> exact-match"

** EBGP multihop route treatment bug is fixed.  Now nexthop is
resolved by IGP routes.

** Some commands are added to show routes by filter-list and community
value.
  "show ip bgp ipv4 (unicast|multicast) filter-list WORD"
  "show ip bgp ipv4 (unicast|multicast) community"
  "show ip bgp ipv4 (unicast|multicast) community-list WORD"
  "show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"

* Changes in zebra

** zebra read interface's address information using getifaddrs() when
it is available.

** Reflect IPv6 interface's address change to protocol daemons.

* Changes in zebra-0.88

* Changes in lib

** "exact-match" option is added to "access-list" and "ipv6
access-list" command.  If this option is specified, the prefix and
prefix length is compared as exact match mode.

* Changes in zebra

** New Zebra message ZEBRA_REDISTRIBUTE_DEFAULT_ADD and
ZEBRA_REDISTRIBUTE_DEFAULT_DELTE are added.

** Default administrative distance value is changed.

            Old         New
------------------------------------------
system      10           0
kernel      20           0
connected   30           0
static      40           1
rip         50         120
ripng       50         120
ospf        60         110
ospf6       49         110
bgp         70         200(iBGP)  20(eBGP)
------------------------------------------

** Distance value can be passed from protocol daemon to zebra.

** "show ip route" shows [metric/distance] value pair.

** Zebra Protocol is changed to support multi-path route and distance
value.

* Changes in ospfd

** "default-information originate [always]" command is added.

** "default-metric <0-16777214>" command is added.

** "show ip ospf database" command is integrated.  LS-ID and AdvRouter can
   be specifed.  The commands are

   show ip ospf database TYPE LS-ID
   show ip ospf database TYPE LS-ID ADV-ROUTER
   show ip ospf database TYPE LS-ID self-originate
   show ip ospf database TYPE self-originate

** route-map support for `redistribute' command are added.
   Supported `match' statements are

   match interface
   match ip address
   match next-hop

   Supported `set' statements are

   set metric
   set metric-type

** Pass OSPF metric value to zebra daemon.

* Changes in ripd

** When specified route-map does not exist, it means all deny.

** "default-metric <1-16>" command is added.

** "offset-list ACCESS-LIST-NAME <0-16>" and "offset-list
ACCESS-LIST-NAME <0-16> IFNAME" commands are added.

** "redistribute ROUTE-TYPE metric <0-16>" command is added.

** "default-information originate" command is added.

** "ip split-horizon" and "no ip split-horizon" is added to interface
configuration.

** "no router rip" command is added.

** "ip rip authentication mode (md5|text)" is added to interface
configuration.

** "ip rip authentication key-chain KEY-CHAIN" is added to interface
configuration.

** Pass RIP metric value to zebra daemon.

** Distance manipulation functions are added.

* Changes in bgpd

** Fix bug of next hop treatment for MPLS-VPN route exchange.

** BGP peer MIB is updated.

** Aggregated route has origin IGP, atomic-aggregate and proper
aggregator attribute.

** Suppressed route now installed into BGP table.  It is only
suppressed from announcement.

** BGP router-id is properly set after "no router bgp ASN" and "router
bgp ASN".

** Add check for nexthop is accessible or not for IBGP routes.

** Add cehck for nexthop is on connected or not for EBGP routes.

** "dump bgp route" command is changed to "dump bgp route-mrt" for
generating MRT compatible dump output.

** Soft reconfiguration inbound and outbound is supported.

** Route refresh feature is supported.

* Changes in vtysh

** VTY shell is now included into the distribution.

* Changes in zebra-0.87

* Changes in lib

** "show startup-config" command is added.

** "show history" command is added.

** Memory statistics command is changed.  New command

   show memory all
   show memory lib
   show memory rip
   show memory ospf
   show memory bgp

are added.

** Filters can be removed only specify it's name.  New command

   no access-list NAME
   no ip community-list NAME
   no ip as-path access-list NAME
   no route-map NAME

are added.

** At any node, user can view/save user configuration.

   write terminal
   write file
   wirte memory

are added to every node in default.

** LCD completion is added.  For example both "ip" and "ipv6" command
are exist, "i" then press TAB will be expanded to "ip".

* Changes in bgpd

** "show ip bgp" family shows total number of prefixes.

** "no bgp default ipv4-unicast" command is added.

** Extended Communities support is added.

** "no neighbor PEER send-community extended" command is added.

** MPLS-VPN PE-RR support is added.

 New address family vpnv4 unicast is introduced.

  !
  address-family vpnv4 unicast
   neighobr PEER activate
   network A.B.C.D rd RD tag TAG
  exit-address-family
  !

 To make it route-reflector, please configure it under normal router
bgp ASN.

  !
  router bgp 7675
   no bgp default ipv4-unicast
   bgp router-id 10.0.0.100
   bgp cluster-id 10.0.0.100
   neighbor 10.0.0.1 remote-as 65535
   neighbor 10.0.0.1 route-reflector-client
   neighbor 10.0.0.2 remote-as 65535
   neighbor 10.0.0.2 route-reflector-client
   neighbor 10.0.0.3 remote-as 65535
   neighbor 10.0.0.3 route-reflector-client
  !
  address-family vpnv4 unicast
   neighbor 10.0.0.1 activate
   neighbor 10.0.0.2 activate
   neighbor 10.0.0.3 activate
  exit-address-family
  !

* Changes in ospfd

** Many many bugs are fixed.

* Changes in ripd

** Better interface up/down event handle.

* Changes in zebra

** Better interface up/down event handle.

* Changes in zebra-0.86

* Changes in lib

** Fix bug of exec-timeout command which may cause crush.

** Multiple same policy for "access-list", "ip prefix-list, "as-path
access-list", "ip community-list" is not duplicated.

** It used to be "ip prefix-list A.B.C.D/M" match routes which mask >=
M.  Now default behavior is exact match so it only match routes which
mask == M.

* Changes in bgpd

** "match ip address prefix-list" is added to route-map.

** A route without local preference is evaluated as 100 local preference.

** Select smaller router-id route when other values are same.

** Compare MED only both routes comes from same neighboring AS.

** "bgp always-compare-med" command is added.

** Now MED value is passed to IBGP peer.

** When neighbor's filter is configured with non-existent access-list,
as-path access-list, ip prefix-list, route-map.  The behavior is
changed from all permit to all deny.

* Changes in ospfd

** Fix bug of external route tag byte order.

** OSPF Neighbor deletion bug which cause crush is fixed.

** Some route calculation bug are fixed.

** Add sanity check with router	routing table.

** Fix bug of memory leak about linklist.

** Fix bug of 1-WayReceived in NSM.

** Take care of BIGENDIAN architecture.

** Fix bug of NSM state flapping between ExStart and Exchange.

** Fix bug of Network-LSA originated in stub network.

** Fix bug of MS flag unset.

** Add to schedule router_lsa origination when the interface cost
changes.

** Increment LS age by configured interface transmit_delay.

** distribute-list is reimplemented.

** Fix bug of refresh never occurs.

** Fix bug of summary-LSAs reorigination.  Correctly copy
OSPF_LSA_APPROVED flag to new LSA. when summary-LSA is reoriginatd.

** Fix bug of re-origination when a neighbor disappears.

** Fix bug of segmentation fault with DD retransmission.

** Fix network-LSA re-origination problem.

** Fix problem of remaining withdrawn routes on zebra.

* Changes in ripd

** Do not leave from multicast group when interface goes down bug is
fixed.

* Changes in zebra

** Remove client structure when client dies.

** Take care static route when interface goes up/down.

* Changes in zebra-0.85

* Changes in bgpd

** "transparent-nexthop" and "transparenet-as" commands are added.

** Route reflector's originator-id bug is fixed.

* Changes in ospfd

** Fix bug of OSPF LSA memory leak.

** Fix bug of OSPF external route memory leak.

** AS-external-LSA origination bug was fixed.

** LS request treatment is completely rewritten.  Now performance is
drastically improved.

* Changes in ripd

** RIPv1 update is done by class-full manner.

* Changes in zebra-0.84b

* Changes in lib

** Fix bug of inet_pton return value handling

* Changes in bgpd

** Fix bug of BGP-4+ link-local address nexthop check for IBGP peer.