Squid error sending to icmpv6 packet to

Getting error in SQUID in virtual machine : SendEcho ERROR:sending to ICMPv6 packet t0 [2a06:98c1:3121::8]: (101) Network is unreachable

I created one virtual machine and configured squid proxy over it. While communicating to outside network i got below error many times.

«SendEcho ERROR:sending to ICMPv6 packet t0 [2a06:98c1:3121::8]: (101) Network is unreachable»

But this happen not every time some time it make connection successful .

Can anyone help me to figure out this issue.

Thanks in Advance

1 answer

@Manish Dixit (NAV Backoffice)
I understand you have configured a squid proxy on your VM and are facing the above error.

Can you confirm if this is affecting your connectivity at all or is this simply an error you are seeing? If you are utilizing ipv4 you can enable the dns_v4_first option which might help. I don’t believe this error is caused by anything on the Azure side. You might try posting your question on StackOverflow or reaching out to the squid mailing lists for more insights into the error.

Please don’t forget to «Accept the answer» and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

Источник

Thread: icmpv6_send: no reply to icmp error

Thread Tools

Display

icmpv6_send: no reply to icmp error

Hi, I’m getting this error every two minutes in my /var/log/syslog.

kernel: [392954.360034] icmpv6_send: no reply to icmp error
kernel: [393025.890027] icmpv6_send: no reply to icmp error
kernel: [393254.830033] icmpv6_send: no reply to icmp error

I don’t know what it means. Is there anything wrong with my Ubuntu 10.04 server ?

Re: icmpv6_send: no reply to icmp error

And are you running this on real hardware, or in a virtual machine?

Re: icmpv6_send: no reply to icmp error

eth0 Link encap:Ethernet direcciуnHW 00:1f:d0:bf:8d:ec
Direc. inet:150.214.196.123 Difus.:150.214.197.255 Mбsc:255.255.254.0
Direcciуn inet6: fec0::9:21f:d0ff:febf:8dec/64 Alcance:Sitio
Direcciуn inet6: 2002:96d6:c55c:9:21f:d0ff:febf:8dec/64 Alcance:Global
Direcciуn inet6: fe80::21f:d0ff:febf:8dec/64 Alcance:Enlace
ACTIVO DIFUSIУN FUNCIONANDO MULTICAST MTU:1500 Mйtrica:1
Paquetes RX:3165702 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:901161 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:1000
Bytes RX:1570952863 (1.5 GB) TX bytes:308178876 (308.1 MB)
Interrupciуn:26 Direcciуn base: 0xc000

eth1 Link encap:Ethernet direcciуnHW 00:0c:76:00:fd:d2
Direc. inet:192.168.0.1 Difus.:192.168.0.255 Mбsc:255.255.255.224
Direcciуn inet6: fe80::20c:76ff:fe00:fdd2/64 Alcance:Enlace
ACTIVO DIFUSIУN FUNCIONANDO MULTICAST MTU:1500 Mйtrica:1
Paquetes RX:593925 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:919668 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:1000
Bytes RX:110859505 (110.8 MB) TX bytes:1046700889 (1.0 GB)
Interrupciуn:21 Direcciуn base: 0x6000

Re: icmpv6_send: no reply to icmp error

You have a 2002:96d6:c55c. address, so you have 6to4 activated, right? Can you «ping6 ipv6.google.com»?

And eth0 has a public IPv4 address, so this system is directly connected to Internet? Is it a kind of gateway, as it has an eth1 (with private IPv4) too?

Re: icmpv6_send: no reply to icmp error

Not sure if I have 6to4 activated, at least it was not activated on purpose. Can be that the reason for the error?

I can’t ping «ping6 ipv6.google.com»
connect: Network is unreachable

Eth0 is directly connected to Internet and Eth1 is connected to Intranet as it is explained here: http://www.somewhereville.com/?p=1196

Re: icmpv6_send: no reply to icmp error

That 6to4 address could be the reason your system thinks there is IPv6, does something, which leads to the error message (because IPv6 is not working).

There are two ways that the 6to4 2002: address can have landed on your Linux system:
1) a router building up the 6to4 tunnel, and distributing 2002: address on your LAN. However: your system has a public IP address, so a router doing NAT is unlikely.
2) your Linux system having a 6to4 tunnel itself (although I don’t see a tunnel interface in your ifconfig). See http://ubuntuforums.org/showthread.php?p=10939087 how to create such a tunnel; hopefully it will give an idea how to remove it

Another possibility is to go *forward* and make the IPv6 working. I would prefer that (see my sig).

Re: icmpv6_send: no reply to icmp error

«rdisc6» is a nice tool to listen for IPv6-address-broadcasts:

rdisc6 -1 -r1 -q wlan0
rdisc6 -1 -r1 -q eth0

If there is a router advertising IPv6, you will get a response .

Re: icmpv6_send: no reply to icmp error

Well, I’m not sure I need IPv6, actually I’ve disabled it and the error is gone.

$ sudo nano /etc/sysctl.conf

Then these lines were added:

# IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

Could this problem has something to do with avahi-daemon? I was getting errors until it was restarted.

$ sudo restart avahi-daemon

PS. I can’t ping localhost. Isn’t it weird?

Last edited by fl5x; March 27th, 2012 at 11:44 AM .

Re: icmpv6_send: no reply to icmp error

$ ifconfig | grep lo $ sudo /sbin/ifconfig lo 127.0.0.1 up
I get this:
$ ifconfig

eth0 Link encap:Ethernet direcciуnHW 00:1f:d0:bf:8d:ec
Direc. inet:150.214.196.123 Difus.:150.214.197.255 Mбsc:255.255.254.0
ACTIVO DIFUSIУN FUNCIONANDO MULTICAST MTU:1500 Mйtrica:1
Paquetes RX:4018297 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:1174822 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:1000
Bytes RX:1890428697 (1.8 GB) TX bytes:416260902 (416.2 MB)
Interrupciуn:26 Direcciуn base: 0xc000

eth1 Link encap:Ethernet direcciуnHW 00:0c:76:00:fd:d2
Direc. inet:192.168.0.1 Difus.:192.168.0.255 Mбsc:255.255.255.224
ACTIVO DIFUSIУN FUNCIONANDO MULTICAST MTU:1500 Mйtrica:1
Paquetes RX:763562 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:1129403 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:1000
Bytes RX:156109149 (156.1 MB) TX bytes:1227315193 (1.2 GB)
Interrupciуn:21 Direcciуn base: 0x6000

lo Link encap:Bucle local
Direc. inet:127.0.0.1 Mбsc:255.0.0.0
ACTIVO BUCLE FUNCIONANDO MTU:16436 Mйtrica:1
Paquetes RX:46 errores:0 perdidos:0 overruns:0 frame:0
Paquetes TX:46 errores:0 perdidos:0 overruns:0 carrier:0
colisiones:0 long.colaTX:0
Bytes RX:3385 (3.3 KB) TX bytes:3385 (3.3 KB)

Now I’m able to ping localhost.

Why didn’t «lo» show up first?

Источник

SquidGuard configuration file

(C)2006 Serg Dvoriancev

logdir /var/squidGuard/log
dbhome /var/db/squidGuard

src Allow_all_dest <
ip 192.168.16.118
>

Allowed access to file transfer sites

src Alow_FileSharing <
ip 192.168.16.106
>

Managing partners

src Management2 <
ip 192.168.16.118
log block.log
>
.

If i enable in web console the Allow_alll_Dest ACL than it is woking just fine, the computer in case can access yahoo.
With allow all dest disabled and Management2 enabled it is not working.
First it has Allow all destionation and the last it has only Webmail allowed. This config was working just fine until a month or two. I have changed nothing beside the update.
Thank you again for your answer :-).

Can you post the corresponding acl for the Management2 src? Perhaps the complete squidGuard config?

The IP address 192.168.16.118 is listed in two group acls: Allow_all_dest and Management.
As long as this is the case, the group won’t be assigned:

2020-07-29 14:26:37 [56101] squidGuard ready for requests (1596025597.929)
2020-07-29 14:26:37 [56101] no ACL matching source, using default
ERR
2020-07-29 14:26:37 [56101] squidGuard stopped (1596025597.930)

As soon as I change one entry, it works:

2020-07-29 14:27:08 [58266] squidGuard 1.4 started (1596025628.201)
2020-07-29 14:27:08 [58266] squidGuard ready for requests (1596025628.203)
ERR
2020-07-29 14:27:08 [58266] squidGuard stopped (1596025628.203)

@coffeelover I will test this imidiatly!
But if it is like this then it is a bug because Allow all destinations it is always disabled! I use it only for investigation.

EDIT: Yes you are right! If i removed the ip form Allow_all_destinations even if this ACL is disabled then Management ACL started working again!
Thank you for thi, i have tested everything but this! 🙂

Yeah, glad to hear this.

I think it is a not a real bug: the src rules are parsed to a linked list, so order matters.

As long as the first matching entry for the source address has no associated acl, it will fall back to default. If you change the order in your configuration, it will also work again.

So this should be an issue for documentation or a plausibility check.

Thanky very much coffelover for helping me with this!
I have another issue, after upgrading pfsense to 2.4.5 series, every morning when people comes to work squid crashes.
The only options i have are:
-from cli starting squid (simple squid..no other parameters) or
-delete cache from UI and then squid automaticaliy restart without a problem or
-reboot the whole system
From services UI i can not restart the squid service. It fails.
This is a tipical log file:

How can i investigate further this problem:
«Jul 29 09:02:17 kernel pid 65891 (squid), jid 0, uid 100: exited on signal 6»

Thank you again! i will start another thread if you think it will help someone else but me.

@coffeelover I will test this imidiatly!
But if it is like this then it is a bug because Allow all destinations it is always disabled! I use it only for investigation.

EDIT: Yes you are right! If i removed the ip form Allow_all_destinations even if this ACL is disabled then Management ACL started working again!
Thank you for thi, i have tested everything but this! 🙂

Seems related to https://redmine.pfsense.org/issues/4088

@viktor_g yeah, but i don’t agree completely to the bug. It is filed very opinionated and some guesses are completely wrong.
Squidguard just resets a non-resolvable client to the default acl, which is common behaviour. If the default acl means ‘allow_all’, it is an configuration issue, it doesn’t «renders squidguard useless».

But yes, perhaps a global setting like ‘include non-linked acls in config’ would be nice or at least a warning should be shown.

• the system resources (cpu, ram, filesystem usage)
• the file permissions

Daily could mean that squid is not able to rotate the logs, because of wrong file permissions.

And if it works after you cleaned the disk cache, it could just be the filesystem filling up.

@coffeelover Hi. Thanks for your reply.
I have checked everthing. RAM CPU Disk Space ..nothing out of the ordinary.
The file permissions seems ok because the system rotates logs at 00:00 without problems.

Squid crashes between 9 and 9:30 AM every morning. I see nothing in crontab which runs at 9.

Jul 29 14:20:26 check_reload_status Syncing firewall
Jul 29 14:20:26 check_reload_status Syncing firewall
Jul 29 14:20:31 check_reload_status Syncing firewall
Jul 29 14:20:42 php-fpm 397 /pkg_edit.php: [squid] — squid_resync function call pr:1 bp: rpc:no
Jul 29 14:20:44 php-fpm 397 /pkg_edit.php: [squid] Adding cronjobs .
Jul 29 14:20:44 php-fpm 397 /pkg_edit.php: [squid] Antivirus features disabled.
Jul 29 14:20:44 php-fpm 397 /pkg_edit.php: [squid] Removing freshclam cronjob.
Jul 29 14:20:44 php-fpm 397 /pkg_edit.php: [squid] Stopping any running proxy monitors
Jul 29 14:20:45 php-fpm 397 /pkg_edit.php: [squid] Reloading for configuration sync.
Jul 29 14:20:46 php-fpm 397 /pkg_edit.php: [squid] Starting a proxy monitor script
Jul 29 14:20:47 check_reload_status Reloading filter
Jul 29 15:45:17 check_reload_status Syncing firewall
Jul 29 15:45:17 check_reload_status Syncing firewall
Jul 29 15:45:28 check_reload_status Syncing firewall
Jul 29 15:45:39 php-fpm 99938 /pkg_edit.php: [squid] — squid_resync function call pr:1 bp: rpc:no
Jul 29 15:45:40 php-fpm 99938 /pkg_edit.php: [squid] Adding cronjobs .
Jul 29 15:45:40 php-fpm 99938 /pkg_edit.php: [squid] Antivirus features disabled.
Jul 29 15:45:40 php-fpm 99938 /pkg_edit.php: [squid] Removing freshclam cronjob.
Jul 29 15:45:40 php-fpm 99938 /pkg_edit.php: [squid] Stopping any running proxy monitors
Jul 29 15:45:41 php-fpm 99938 /pkg_edit.php: [squid] Reloading for configuration sync.
Jul 29 15:45:41 php-fpm 99938 /pkg_edit.php: [squid] Starting a proxy monitor script
Jul 29 15:45:42 check_reload_status Reloading filter
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): WRITE(6). CDB: 0a 19 d2 28 40 00
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): CAM status: SCSI Status Error
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): SCSI status: Check Condition
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): SCSI sense: UNIT ATTENTION asc:3f,2 (Changed operating definition)
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): Retrying command (per sense data)
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): WRITE(6). CDB: 0a 07 4f 08 01 00
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): CAM status: SCSI Status Error
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): SCSI status: Check Condition
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): SCSI sense: UNIT ATTENTION asc:3f,2 (Changed operating definition)
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): Retrying command (per sense data)
Jul 30 05:00:55 rc.gateway_alarm 7850 >>> Gateway alarm: GW_WAN (Addr:192.168.16.1 Alarm:1 RTT:1.383ms RTTsd:1.839ms Loss:21%)
Jul 30 05:00:55 check_reload_status updating dyndns GW_WAN
Jul 30 05:00:55 check_reload_status Restarting ipsec tunnels
Jul 30 05:00:55 check_reload_status Restarting OpenVPN tunnels/interfaces
Jul 30 05:00:55 check_reload_status Reloading filter
Jul 30 05:02:23 check_reload_status Linkup starting hn0
Jul 30 05:02:23 kernel hn0: network changed, change 1
Jul 30 05:02:23 kernel hn0: link state changed to DOWN
Jul 30 05:02:24 php-fpm 99938 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:24 check_reload_status Reloading filter
Jul 30 05:02:27 sshd 82200 Timeout, client not responding.
Jul 30 05:02:28 check_reload_status Linkup starting hn0
Jul 30 05:02:28 kernel hn0: link state changed to UP
Jul 30 05:02:29 php-fpm 339 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:29 check_reload_status Reloading filter
Jul 30 05:02:41 check_reload_status Linkup starting hn0
Jul 30 05:02:41 kernel hn0: network changed, change 1
Jul 30 05:02:41 kernel hn0: link state changed to DOWN
Jul 30 05:02:42 php-fpm 30623 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:42 check_reload_status Reloading filter
Jul 30 05:02:46 check_reload_status Linkup starting hn0
Jul 30 05:02:46 kernel hn0: link state changed to UP
Jul 30 05:02:47 php-fpm 338 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:47 check_reload_status Reloading filter
Jul 30 05:02:53 check_reload_status Linkup starting hn0
Jul 30 05:02:53 kernel hn0: network changed, change 1
Jul 30 05:02:53 kernel hn0: link state changed to DOWN
Jul 30 05:02:54 php-fpm 22515 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:54 check_reload_status Reloading filter
Jul 30 05:02:58 check_reload_status Linkup starting hn0
Jul 30 05:02:58 kernel hn0: link state changed to UP
Jul 30 05:02:59 php-fpm 397 /rc.linkup: Ignoring link event for bridge member without IP config
Jul 30 05:02:59 check_reload_status Reloading filter
Jul 30 05:04:14 rc.gateway_alarm 86494 >>> Gateway alarm: GW_WAN (Addr:192.168.16.1 Alarm:0 RTT:1.445ms RTTsd:1.415ms Loss:5%)
Jul 30 05:04:14 check_reload_status updating dyndns GW_WAN
Jul 30 05:04:14 check_reload_status Restarting ipsec tunnels
Jul 30 05:04:14 check_reload_status Restarting OpenVPN tunnels/interfaces
Jul 30 05:04:14 check_reload_status Reloading filter
Jul 30 09:14:55 kernel pid 3599 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:14:56 kernel pid 58817 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:14:57 kernel pid 61209 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:14:58 kernel pid 64892 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:14:59 kernel pid 67991 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:15:00 kernel pid 71182 (squid), jid 0, uid 100: exited on signal 6
Jul 30 09:15:22 Squid_Alarm 75627 Squid has exited. Reconfiguring filter.
Jul 30 09:15:22 Squid_Alarm 75891 Attempting restart.
Jul 30 09:15:25 Squid_Alarm 77973 Reconfiguring filter.
Jul 30 09:15:25 check_reload_status Reloading filter
Jul 30 09:15:26 php-fpm 22515 /rc.filter_configure_sync: [squid] Installed but not started. Not installing ‘nat’ rules.
Jul 30 09:15:26 php-fpm 22515 /rc.filter_configure_sync: [squid] Installed but not started. Not installing ‘pfearly’ rules.
Jul 30 09:15:26 php-fpm 22515 /rc.filter_configure_sync: [squid] Installed but not started. Not installing ‘filter’ rules.
Jul 30 09:19:47 php-fpm 397 /pkg_edit.php: Session timed out for user ‘admin’ from: 192.168.16.10 (Local Database)
Jul 30 09:19:49 php-fpm 397 /pkg_edit.php: Successful login for user ‘admin’ from: 192.168.16.10 (Local Database)
Jul 30 09:20:19 php-fpm 22515 /pkg_edit.php: [squid] Clear disk cache forced via GUI. Clearing cache now.
Jul 30 09:20:19 php-fpm 22515 /pkg_edit.php: [squid] Stopping any running proxy monitors
Jul 30 09:20:21 php-fpm 22515 /pkg_edit.php: [squid] Creating cache dir ‘/var/squid/cache’ .
Jul 30 09:20:21 php-fpm 22515 /pkg_edit.php: [squid] Creating Squid cache subdirs in /var/squid/cache .
Jul 30 09:20:25 php-fpm 22515 /pkg_edit.php: [squid] Starting service.
Jul 30 09:20:25 php-fpm 22515 /pkg_edit.php: [squid] Starting a proxy monitor script
Jul 30 09:20:26 check_reload_status Syncing firewall
Jul 30 09:20:26 php-fpm 22515 /pkg_edit.php: [squid] — squid_resync function call pr:1 bp: rpc:no
Jul 30 09:20:28 php-fpm 22515 /pkg_edit.php: [squid] Adding cronjobs .
Jul 30 09:20:28 php-fpm 22515 /pkg_edit.php: [squid] Antivirus features disabled.
Jul 30 09:20:28 php-fpm 22515 /pkg_edit.php: [squid] Removing freshclam cronjob.
Jul 30 09:20:28 php-fpm 22515 /pkg_edit.php: [squid] Stopping any running proxy monitors
Jul 30 09:20:29 php-fpm 22515 /pkg_edit.php: [squid] Reloading for configuration sync.
Jul 30 09:20:29 php-fpm 22515 /pkg_edit.php: [squid] Starting a proxy monitor script
Jul 30 09:20:30 check_reload_status Reloading filter

What other logs should i check?
Thank you again! 🙂

Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): WRITE(6). CDB: 0a 19 d2 28 40 00
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): CAM status: SCSI Status Error
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): SCSI status: Check Condition
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): SCSI sense: UNIT ATTENTION asc:3f,2 (Changed operating definition)
Jul 30 01:30:25 kernel (da0:storvsc0:0:0:0): Retrying command (per sense data)
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): WRITE(6). CDB: 0a 07 4f 08 01 00
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): CAM status: SCSI Status Error
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): SCSI status: Check Condition
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): SCSI sense: UNIT ATTENTION asc:3f,2 (Changed operating definition)
Jul 30 02:08:03 kernel (da0:storvsc0:0:0:0): Retrying command (per sense data)

And it works before 9? These scsi errors are from hyper-v snapshots i guess?
Perhaps try to disable these? There is no filesystem error, but i think it is worth a try.

And you should increase the debug level:

debug_options 1,5 6,5 ALL,1

Section 1 is main loop, Section 6 is disk i/o.

Hi coffelover!
Yes you are right, at that time windows backup start. But unfortuantly it is unrelated.
But today i have restarted and cleaned the cache at 8:30 AM from UI to see if it will crash again. At 9:02 it crashed . / CPU was ok, RAM also, disk space 35 GB free.
Could be an user that try to access something that crashes the whole squid? The office hours starts at 9:00 AM here..
Is there any other log that i could look into?
Thanks.

The debugging logs from squid go to /var/log/squid/cache.log

Hi. I do not have such a file..but:
/var/squid/logs/cache.log

This is the log from the time of crash. and it continuies like this. 6000 lines.
Do you see anything importand than the second log line?
Thanks
EDIT: I have problem pasting the log here. it says that contains spam. So i have uplaoded the log as an atachmentsquid.cache.log.txt

Your permissions for /var/log/squidGuard/squidGuard.log are not correct.

And i would check my generated whitelist file and possibly fix the whitelist entries.

Источник

1

2

3

4

5

6

7

8

9

10

11

12

14

15#if USE_ICMP

16

21

22

23

24

25#if HAVE_NETINET_IP6_H

26#include <netinet/ip6.h>

27#endif

28

29

30

31static const char *

33{

34

35 static const char *icmp6LowPktStr[] = {

36 «ICMPv6 0»,

37 «Destination Unreachable»,

38 «Packet Too Big»,

39 «Time Exceeded»,

40 «Parameter Problem»,

41 };

42

43

44 if (0 < v && v < 5)

45 return icmp6LowPktStr[(int)(v&0x7f)];

46

47

48 static const char *icmp6HighPktStr[] = {

49 «Echo Request»,

50 «Echo Reply»,

51 «Multicast Listener Query»,

52 «Multicast Listener Report»,

53 «Multicast Listener Done»,

54 «Router Solicitation»,

55 «Router Advertisement»,

56 «Neighbor Solicitation»,

57 «Neighbor Advertisement»,

58 «Redirect Message»,

59 «Router Renumbering»,

60 «ICMP Node Information Query»,

61 «ICMP Node Information Response»,

62 «Inverse Neighbor Discovery Solicitation»,

63 «Inverse Neighbor Discovery Advertisement»,

64 «Version 2 Multicast Listener Report»,

65 «Home Agent Address Discovery Request»,

66 «Home Agent Address Discovery Reply»,

67 «Mobile Prefix Solicitation»,

68 «Mobile Prefix Advertisement»,

69 «Certification Path Solicitation»,

70 «Certification Path Advertisement»,

71 «ICMP Experimental (150)»,

72 «Multicast Router Advertisement»,

73 «Multicast Router Solicitation»,

74 «Multicast Router Termination»,

75 };

76

77

78 if (127 < v && v < 154)

79 return icmp6HighPktStr[(int)(v&0x7f)];

80

81

82 static char buf[50];

83 snprintf(buf, sizeof(buf), «ICMPv6 %u», v);

84 return buf;

85}

86

88{

89 ;

90}

91

93{

95}

96

97int

99{

101

103 int xerrno = errno;

105 return -1;

106 }

107

110

112}

113

117void

119{

120 int x;

122 struct icmp6_hdr *icmp = nullptr;

124 struct addrinfo *S = nullptr;

125 size_t icmp6_pktsize = 0;

126

127 static_assert(sizeof(*icmp) + sizeof(*echo) <= sizeof(pkt), «our custom ICMPv6 Echo payload fits the packet buffer»);

128

130 icmp = (struct icmp6_hdr *)pkt;

131

132

133

134

135

136 if (len < 0) {

137 len = 0;

138 }

139

140

141 icmp->icmp6_type = ICMP6_ECHO_REQUEST;

142 icmp->icmp6_code = 0;

143 icmp->icmp6_cksum = 0;

147

148 icmp6_pktsize = sizeof(struct icmp6_hdr);

149

150

151 echo = reinterpret_cast<icmpEchoData *>(reinterpret_cast<char *>(pkt) + sizeof(*icmp));

152 echo->opcode = (unsigned char) opcode;

153 memcpy(&echo->tv, &current_time, sizeof(struct timeval));

154

155 icmp6_pktsize += sizeof(struct timeval) + sizeof(char);

156

157 if (payload) {

160

161 memcpy(echo->payload, payload, len);

162

163 icmp6_pktsize += len;

164 }

165

166 icmp->icmp6_cksum = CheckSum((unsigned short *) icmp, icmp6_pktsize);

167

169 ((sockaddr_in6*)S->ai_addr)->sin6_port = 0;

170

172

173 debugs(42, 5, «Send Icmp6 packet to « << to << «.»);

174

176 (const void *) pkt,

177 icmp6_pktsize,

178 0,

181

182 if (x < 0) {

183 int xerrno = errno;

185 }

186 debugs(42,9, «x=» << x);

187

188 Log(to, 0, nullptr, 0, 0);

190}

191

195void

197{

198 int n;

199 struct addrinfo *from = nullptr;

200

201 static char *pkt = nullptr;

202 struct icmp6_hdr *icmp6header = nullptr;

204 struct timeval now;

206

209 return;

210 }

211

212 if (pkt == nullptr) {

214 }

215

217

219 (void *)pkt,

221 0,

224

225 if (n <= 0) {

226 debugs(42, DBG_CRITICAL, «ERROR: when calling recvfrom() on ICMPv6 socket.»);

228 return;

229 }

230

231 preply.from = *from;

232

233#if GETTIMEOFDAY_NO_TZP

234

235 gettimeofday(&now);

236

237#else

238

239 gettimeofday(&now, nullptr);

240

241#endif

242

243 debugs(42, 8, n << » bytes from « << preply.from);

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272 icmp6header = (struct icmp6_hdr *) pkt;

273

274 if (icmp6header->icmp6_type != ICMP6_ECHO_REPLY) {

275

276 switch (icmp6header->icmp6_type) {

277 case 134:

278 case 135:

279 case 136:

280

281 break;

282

283 default:

284 debugs(42, 8, preply.from << » said: « << icmp6header->icmp6_type << «/» << (int)icmp6header->icmp6_code << » « <<

286 }

288 return;

289 }

290

291 if (icmp6header->icmp6_id != icmp_ident) {

292 debugs(42, 8, «dropping Icmp6 read. IDENT check failed. ident=='» << icmp_ident << «‘=='» << icmp6header->icmp6_id << «‘»);

294 return;

295 }

296

297 echo = (icmpEchoData *) (pkt + sizeof(icmp6_hdr));

298

300

301 struct timeval tv;

302 memcpy(&tv, &echo->tv, sizeof(struct timeval));

304

305

306

307

308

309

310

311 preply.hops = 1;

312

313 preply.psize = n — sizeof(icmp6_hdr) — (sizeof(icmpEchoData) — MAX_PKT6_SZ);

314

315

316 if ( preply.psize > (unsigned short) MAX_PKT6_SZ) {

318 } else if ( preply.psize < (unsigned short)0) {

319 preply.psize = 0;

320 }

321

322 Log(preply.from,

323 icmp6header->icmp6_type,

325 preply.rtt,

326 preply.hops);

327

328

331}

332

333#endif

334