Some continuation to the previous post:
Ping from host with code using mac addresses for gw (ipv6 addr fd00::3/128):
fd00::1 (linux host)
ping6 fd00::1
PING6(56=40+8+8 bytes) fd00::3 --> fd00::1
16 bytes from fd00::1, icmp_seq=0 hlim=64 time=4.047 ms
16 bytes from fd00::1, icmp_seq=1 hlim=64 time=1.792 ms
16 bytes from fd00::1, icmp_seq=2 hlim=64 time=0.795 ms
^C
--- fd00::1 ping6 statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.795/2.211/4.047/1.360 ms
fd00::4 (freebsd host running original code)
ping6 fd00::4
PING6(56=40+8+8 bytes) fd00::3 --> fd00::4
no response
tcpdump -nei re0 output on host with original code:
10:07:21.720560 00:01:00:00:00:04 > 33:33:00:00:00:6d, ethertype IPv6 (0x86dd), length 158: fd00::4.698 > ff02::6d.698: OLSR, seq 0xd218, length 96
10:07:21.909741 00:01:00:00:00:04 > 02:21:30:ca:dd:35, ethertype IPv4 (0x0800), length 114: 10.0.0.4.22 > 10.0.0.99.36085: Flags [P.], ack 49, win 8326, options [nop,nop,TS val 1136371185 ecr 2080490], length 48
10:07:21.910094 02:21:30:ca:dd:35 > 00:01:00:00:00:04, ethertype IPv4 (0x0800), length 66: 10.0.0.99.36085 > 10.0.0.4.22: Flags [.], ack 35472, win 1002, options [nop,nop,TS val 2080648 ecr 1136371185], length 0
10:07:21.974657 00:01:00:00:00:03 > 33:33:ff:00:00:04, ethertype IPv6 (0x86dd), length 86: fd00::3 > ff02::1:ff00:4: ICMP6, neighbor solicitation, who has fd00::4, length 32
10:07:22.014421 00:01:00:00:00:04 > 33:33:ff:00:00:03, ethertype IPv6 (0x86dd), length 86: fd00::4 > ff02::1:ff00:3: ICMP6, neighbor solicitation, who has fe80::3, length 32
So the original code, doesn't know where to send the answer for the ICMP request, that's why the other host doesn't receive anything.
Also, I tested and the code using lonklocal address, but adds only a default route works the same as the one using mac addresse, but I'm nt sure if it is the best.
Thursday, July 7, 2011
Wednesday, July 6, 2011
Improve olsrd on BSD: use linklocal address or not?
Olsrd before the improvements (no filtering, each node can see all others):
IPv4:
--- 20:53:00.042579 ---------------------------------------------------- LINKS
IP address hyst LQ ETX
10.0.0.3 0.000 1.000/1.000 1.000
10.0.0.2 0.000 0.839/0.761 1.565
10.0.0.1 0.000 1.000/1.000 1.000
--- 20:53:03.216848 ----------------------- TWO-HOP NEIGHBORS
IP addr (2-hop) IP addr (1-hop) Total cost
10.0.0.3 10.0.0.1 2.000
10.0.0.2 3.117
10.0.0.1 10.0.0.2 3.582
10.0.0.3 2.000
10.0.0.2 10.0.0.3 2.128
10.0.0.1 2.595
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 13258 re0
10.0.0.1/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.2 10.0.0.3 UGH 0 5 re0 =>
10.0.0.2/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.3 10.0.0.2 UGH 0 2 re0 =>
10.0.0.3/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.4 link#1 UHS 0 0 lo0
127.0.0.1 link#4 UH 0 0 lo0
Aliases are also created and not deleted after closing olsrd.
IPv6:
--- 21:18:09.197225 ---------------------------------------------------- LINKS
IP address hyst LQ ETX
fd00::1 0.000 1.000/1.000 1.000
fd00::2 0.000 1.000/1.000 1.000
fd00::3 0.000 1.000/1.000 1.000
--- 21:18:09.197602 ----------------------- TWO-HOP NEIGHBORS
IP addr (2-hop) IP addr (1-hop) Total cost
fd00::3 fd00::2 2.000
fd00::1 2.000
fd00::1 fd00::3 2.000
fd00::2 2.000
fd00::2 fd00::3 2.000
fd00::1 2.000
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::1 fe80::1%re0 UGH re0
fd00::2 fe80::2%re0 UGH re0
fd00::3 fe80::3%re0 UGH re0
fd00::4 link#1 UHS lo0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:4%re0 link#1 UHS lo0
fe80::%re1/64 link#2 U re1
fe80::201:ff:fe00:d%re1 link#2 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:4%re0 U re0
ff01:2::/32 fe80::201:ff:fe00:d%re1 U re1
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:4%re0 U re0
ff02::%re1/32 fe80::201:ff:fe00:d%re1 U re1
ff02::%lo0/32 ::1 U lo0
Olsrd with no aliases added:
IPv4:
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 8707 re0
10.0.0.1/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.2/32 00:01:00:00:00:03 U 0 11 re0
10.0.0.3 link#1 UHS 0 0 lo0
10.0.0.4/32 00:01:00:00:00:03 U 0 0 re0
127.0.0.1 link#4 UH 0 0 lo0
IPv6:
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0 =>
default fe80::4%re0 U re0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::3 link#1 UHS lo0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:3%re0 link#1 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:3%re0 U re0
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:3%re0 U re0
ff02::%lo0/32 ::1 U lo0
So, instead of routes, there is only one default route created, which is not deleted after closing olsrd.
Olsrd with no aliases, and MAC addresses for IPv6 gateways:
IPv4:
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 20770 re0
10.0.0.1/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.2/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.3 link#1 UHS 0 0 lo0
10.0.0.4/32 00:01:00:00:00:03 U 0 0 re0
127.0.0.1 link#4 UH 0 0 lo0
IPv6:
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::1/128 00:01:00:00:00:03 U re0
fd00::2/128 00:01:00:00:00:03 U re0
fd00::3 link#1 UHS lo0
fd00::4/128 00:01:00:00:00:03 U re0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:3%re0 link#1 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:3%re0 U re0
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:3%re0 U re0
ff02::%lo0/32 ::1 U lo0
IPv4:
--- 20:53:00.042579 ---------------------------------------------------- LINKS
IP address hyst LQ ETX
10.0.0.3 0.000 1.000/1.000 1.000
10.0.0.2 0.000 0.839/0.761 1.565
10.0.0.1 0.000 1.000/1.000 1.000
--- 20:53:03.216848 ----------------------- TWO-HOP NEIGHBORS
IP addr (2-hop) IP addr (1-hop) Total cost
10.0.0.3 10.0.0.1 2.000
10.0.0.2 3.117
10.0.0.1 10.0.0.2 3.582
10.0.0.3 2.000
10.0.0.2 10.0.0.3 2.128
10.0.0.1 2.595
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 13258 re0
10.0.0.1/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.2 10.0.0.3 UGH 0 5 re0 =>
10.0.0.2/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.3 10.0.0.2 UGH 0 2 re0 =>
10.0.0.3/32 00:01:00:00:00:04 U 0 0 re0
10.0.0.4 link#1 UHS 0 0 lo0
127.0.0.1 link#4 UH 0 0 lo0
Aliases are also created and not deleted after closing olsrd.
IPv6:
--- 21:18:09.197225 ---------------------------------------------------- LINKS
IP address hyst LQ ETX
fd00::1 0.000 1.000/1.000 1.000
fd00::2 0.000 1.000/1.000 1.000
fd00::3 0.000 1.000/1.000 1.000
--- 21:18:09.197602 ----------------------- TWO-HOP NEIGHBORS
IP addr (2-hop) IP addr (1-hop) Total cost
fd00::3 fd00::2 2.000
fd00::1 2.000
fd00::1 fd00::3 2.000
fd00::2 2.000
fd00::2 fd00::3 2.000
fd00::1 2.000
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::1 fe80::1%re0 UGH re0
fd00::2 fe80::2%re0 UGH re0
fd00::3 fe80::3%re0 UGH re0
fd00::4 link#1 UHS lo0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:4%re0 link#1 UHS lo0
fe80::%re1/64 link#2 U re1
fe80::201:ff:fe00:d%re1 link#2 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:4%re0 U re0
ff01:2::/32 fe80::201:ff:fe00:d%re1 U re1
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:4%re0 U re0
ff02::%re1/32 fe80::201:ff:fe00:d%re1 U re1
ff02::%lo0/32 ::1 U lo0
Olsrd with no aliases added:
IPv4:
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 8707 re0
10.0.0.1/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.2/32 00:01:00:00:00:03 U 0 11 re0
10.0.0.3 link#1 UHS 0 0 lo0
10.0.0.4/32 00:01:00:00:00:03 U 0 0 re0
127.0.0.1 link#4 UH 0 0 lo0
IPv6:
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0 =>
default fe80::4%re0 U re0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::3 link#1 UHS lo0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:3%re0 link#1 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:3%re0 U re0
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:3%re0 U re0
ff02::%lo0/32 ::1 U lo0
So, instead of routes, there is only one default route created, which is not deleted after closing olsrd.
Olsrd with no aliases, and MAC addresses for IPv6 gateways:
IPv4:
netstat output:
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
10.0.0.0/8 link#1 U 2 20770 re0
10.0.0.1/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.2/32 00:01:00:00:00:03 U 0 0 re0
10.0.0.3 link#1 UHS 0 0 lo0
10.0.0.4/32 00:01:00:00:00:03 U 0 0 re0
127.0.0.1 link#4 UH 0 0 lo0
IPv6:
netstat output:
Internet6:
Destination Gateway Flags Netif Expire
::/96 ::1 UGRS lo0
::1 ::1 UH lo0
::ffff:0.0.0.0/96 ::1 UGRS lo0
fd00::/8 link#1 U re0
fd00::1/128 00:01:00:00:00:03 U re0
fd00::2/128 00:01:00:00:00:03 U re0
fd00::3 link#1 UHS lo0
fd00::4/128 00:01:00:00:00:03 U re0
fe80::/10 ::1 UGRS lo0
fe80::%re0/64 link#1 U re0
fe80::201:ff:fe00:3%re0 link#1 UHS lo0
fe80::%lo0/64 link#4 U lo0
fe80::1%lo0 link#4 UHS lo0
ff01:1::/32 fe80::201:ff:fe00:3%re0 U re0
ff01:4::/32 ::1 U lo0
ff02::/16 ::1 UGRS lo0
ff02::%re0/32 fe80::201:ff:fe00:3%re0 U re0
ff02::%lo0/32 ::1 U lo0
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