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Bug ID	10437
Summary	[DHCPv6] Check whether the hop-count of most inner message is equal to 0
Product	Wireshark
Version	1.99.x (Experimental)
Hardware	All
OS	All
Status	UNCONFIRMED
Severity	Enhancement
Priority	Low
Component	Dissection engine (libwireshark)
Assignee	bugzilla-admin@wireshark.org
Reporter	jerome.laforge@gmail.com

Created attachment 13025 [details]
correct pcap with inner hopcount = 0

Build Information:
Linux
--
Check whether the hop-count of most inner message is equal to 0

This bugs report is created for keeping the test pcap files.


Extract RFC3315 about relay message and hop-count :

20.1.1. Relaying a Message from a Client

   If the relay agent received the message to be relayed from a client,
   the relay agent places a global or site-scoped address with a prefix
   assigned to the link on which the client should be assigned an
   address in the link-address field.  This address will be used by the
   server to determine the link from which the client should be assigned
   an address and other configuration information.  The hop-count in the
   Relay-forward message is set to 0.

20.3. Construction of Relay-reply Messages

   A server uses a Relay-reply message to return a response to a client
   if the original message from the client was relayed to the server in
   a Relay-forward message or to send a Reconfigure message to a client
   if the server does not have an address it can use to send the message
   directly to the client.

   A response to the client MUST be relayed through the same relay
   agents as the original client message.  The server causes this to
   happen by creating a Relay-reply message that includes a Relay
   Message option containing the message for the next relay agent in the
   return path to the client.  The contained Relay-reply message
   contains another Relay Message option to be sent to the next relay
   agent, and so on.  The server must record the contents of the
   peer-address fields in the received message so it can construct the
   appropriate Relay-reply message carrying the response from the
   server.

   For example, if client C sent a message that was relayed by relay
   agent A to relay agent B and then to the server, the server would
   send the following Relay-Reply message to relay agent B:

   msg-type:       RELAY-REPLY
   hop-count:      1
   link-address:   0
   peer-address:   A
   Relay Message option, containing:
     msg-type:     RELAY-REPLY
     hop-count:    0
     link-address: address from link to which C is attached
     peer-address: C
     Relay Message option: <response from server>

Change-Id: I774cc22c9c090af1a5d3732115c7cd3478343288

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