• Lorenzo Colitti's avatar
    net: ipv6: Add IPv6 support to the ping socket. · 6d0bfe22
    Lorenzo Colitti authored
    This adds the ability to send ICMPv6 echo requests without a
    raw socket. The equivalent ability for ICMPv4 was added in
    2011.
    
    Instead of having separate code paths for IPv4 and IPv6, make
    most of the code in net/ipv4/ping.c dual-stack and only add a
    few IPv6-specific bits (like the protocol definition) to a new
    net/ipv6/ping.c. Hopefully this will reduce divergence and/or
    duplication of bugs in the future.
    
    Caveats:
    
    - Setting options via ancillary data (e.g., using IPV6_PKTINFO
      to specify the outgoing interface) is not yet supported.
    - There are no separate security settings for IPv4 and IPv6;
      everything is controlled by /proc/net/ipv4/ping_group_range.
    - The proc interface does not yet display IPv6 ping sockets
      properly.
    
    Tested with a patched copy of ping6 and using raw socket calls.
    Compiles and works with all of CONFIG_IPV6={n,m,y}.
    Signed-off-by: default avatarLorenzo Colitti <lorenzo@google.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    6d0bfe22
ipv6.h 24.3 KB