Add an internal respondd provider "respondd-providers" which allows a
respondd querier to query which providers are registered on a node.
Example output:
{
"respondd-providers": [
"neighbours",
"nodeinfo",
"statistics",
"statistics-extended"
]
}
This can be useful for providers which are known to be bulky, where the
actual data is better queried via HTTP/TCP instead. But where such a
provider is only present on a few nodes, so you'd want to avoid
trying each node via HTTP.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Fortunately, the destination buffer is always big enough, so no buffer
overflow can happen. Use memcpy instead of strncpy to make this explicit
(and slightly more efficient).
Previously, delays were specific for interfaces, but not for the group
address. This behaviour was confusing when the same interface was passed
for multiple group addresses. Fix by keeping track of both groups and
interfaces.
