I enabled IPv6 on Redhat Linux 7.3 and Redhat AS 3.

I have written a sample Client and Server program using the IPv4/IPv6 compatible socket calls.

When i give IPv4 address, the server binds and listens to client connections.
But when i give IPv6 Address, bind fails as below

bind() failed with error 22: Invalid argument

ifconfig -a lists both IPv4 and IPv6 addresses.

I am able to ping both the addresses.

This same code works fine on Solaris,AIX,Windows,HPUX but on both the Linux distributions its not working.
Please help.

Thanks
yash

Please show fragments of your code, especially all socket-related functions.

Thanks mara for your reply..

here is the code fragment

Client Code :

RetVal = getaddrinfo("fe80::210:b5ff:fea6:d412", "16000", &Hints, &AI);
ConnSocket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol);
i = connect(ConnSocket, (struct sockaddr *)AI->ai_addr, AI->ai_addrlen);

Socket Code :

RetVal = getaddrinfo("fe80::210:b5ff:fea6:d412%eth0", "16000", &Hints, &AI);
ServSock1 = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol);
i = bind(ServSock1, (struct sockaddr *)AI->ai_addr, AI->ai_addrlen);
i = listen(ServSock1, 5);

earlier i dint give the "%eth0" along with the address in the server code.. hence the bind was getting failed. After giving tht bind got succeded but now i am havng a problem on the client side.

the connect() is getting failed with the following message

"Error Connection establishment, error 22: Invalid argument"

Please help..
thnks
yash

It's hard to say without seeing all the values you pass, but I'd look into AI->ai_addrlen. Better, print out the values. Maybe the protocl doesn't make sense etc.