[mpls-linux-general] Basic Discovery Mechanism on ppp link

[<zjh...@so...>]

hi,jim
how are you ? Are you busy ? Wish you happy in your life !

Now I have a question to  discuss with you.

 In your code you create a UDP socket to send LDP Link Hellos .This is basic discovery mechanism .In your LDP code you make the UDP socket join a multicast group by setsockopt( ). This work well on ethernet link because the if->destaddr is a multicast group addr. 
 In the case of PPP,you also join a multicast by this way;but in your code the destaddr of ppp interface is not a multicast group addr.So there is the problem .

Does I understand your code correctly ? Perhaps you can give me your design of the code.

Why your code have a destaddr in the ldp_if_linux struct. What's the use of the data element "destaddr "?

Forgive my pool English!! you can also mail me:jh...@ma... your answer!

All thanks!

                                          your sincerely :
                                             zhangjh