DHCPv6 Relay multivlan functionality support#9178
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lguohan merged 3 commits intosonic-net:masterfrom Nov 12, 2021
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Fix support for DHCPV6 Relay multi vlan functionality. Make sure the relayed packet is received at correct interface. How I did it Bind a socket to each vlan interface's global and link-local address. Socket binded to global address is used for relaying data from client to server and receiving data from servers. Socket binded to link-local address is used for relaying data received from server back to the client.
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Why I did it
Fix support for DHCPV6 Relay multi vlan functionality. Make sure the relayed packet is received at correct interface.
How I did it
Bind a socket to each vlan interface's global and link-local address.
Socket binded to global address is used for relaying data from client to server and receiving data from servers.
Socket binded to link-local address is used for relaying data received from server back to the client.
How to verify it
Build a image and run two_vlan dhcpv6 tests.
Which release branch to backport (provide reason below if selected)
Description for the changelog
A picture of a cute animal (not mandatory but encouraged)