• Xin Long's avatar
    sctp: add SCTP_AUTH_FREE_KEY type for AUTHENTICATION_EVENT · ec2e506c
    Xin Long authored
    This patch is to add SCTP_AUTH_FREE_KEY type for AUTHENTICATION_EVENT,
    as described in section 6.1.8 of RFC6458.
    
          SCTP_AUTH_FREE_KEY:  This report indicates that the SCTP
             implementation will no longer use the key identifier specified
             in auth_keynumber.
    
    After deactivating a key, it would never be used again, which means
    it's refcnt can't be held/increased by new chunks. But there may be
    some chunks in out queue still using it. So only when refcnt is 1,
    which means no chunk in outqueue is using/holding this key either,
    this EVENT would be sent.
    
    When users receive this notification, they could do DEL_KEY sockopt to
    remove this shkey, and also tell the peer that this key won't be used
    in any chunk thoroughly from now on, then the peer can remove it as
    well safely.
    Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
    Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    ec2e506c
socket.c 236 KB