The popular utility ping has several severe limitations such as the inability to query specific interfaces on a node and requiring bidirectional connectivity between the probing and probed interfaces. RFC 8335 attempts to solve these limitations by creating the new utility PROBE which is a specialized ICMP message that makes use of the ICMP Extention Structure outlined in RFC 4884.
This patchset adds definitions for the ICMP Extended Echo Request and Reply (PROBE) types for both IPV4 and IPV6, adds a sysctl to enable response to PROBE messages, expands the list of supported ICMP messages to accommodate PROBE types, and adds functionality to respond to PROBE requests. Andreas Roeseler (6): icmp: support for RFC 8335 ICMPv6: support for RFC 8335 net: add sysctl for enabling RFC 8335 PROBE messages net: add sysctl for enabling RFC 8335 PROBE messages net: add support for sending RFC 8335 PROBE messages icmp: add response to RFC 8335 PROBE messages include/net/netns/ipv4.h | 1 + include/uapi/linux/icmp.h | 22 ++++++ include/uapi/linux/icmpv6.h | 6 ++ net/ipv4/icmp.c | 135 +++++++++++++++++++++++++++++++++--- net/ipv4/ping.c | 4 +- net/ipv4/sysctl_net_ipv4.c | 7 ++ 6 files changed, 164 insertions(+), 11 deletions(-) -- 2.25.1
