* Add support to use bash in host resource
Netcat's presence is widely regarded as a security issue, and thus not
always available. This solution first tries to use bash builtins and
timeout (from coreutils), so is less likely to require installing
additional packages.
* Darwin UDP support in host resource
* Host: use netcat first if available
Signed-off-by: João Vale <jpvale@gmail.com>
* Added output for port/protocol for host resource.
Signed-off-by: Jared Quick <jquick@chef.io>
* refactor with explicit return
This fixes#2085. Port and protocol are now shown in output of the host
resource if defined.
Signed-off-by: Jared Quick <jquick@chef.io>
* refactor with string building return
Signed-off-by: Jared Quick <jquick@chef.io>
* Change host resource to use getent ahosts on Linux
In InSpec 1.31, we changed the `host` resource to use `dig` instead of `getent
hosts` for name resolution because `getent hosts` does not return all entries
(only the first v6 entry if it exists, then the first v4 entry) and we wanted to
keep the Darwin and Linux implementation as close as possible. Unfortunately,
this affected users' ability to do resolution checks for entried stored in their
/etc/hosts file.
This change goes back to using `getent` for Linux and changes to `getent ahosts`
which returns both v4 and v6 records. Additionally, the Darwin provider's dig
implementation was reordered to return v4 addresses before v6 addresses to be
consistent with how `getent ahosts` returns records.
Signed-off-by: Adam Leff <adam@leff.co>
* Update unit tests for resolve_with_getent with proper output
Signed-off-by: Adam Leff <adam@leff.co>
The logic used to determine whether a viable netcat binary exists is wrong and
prevents Linux hosts from doing TCP reachability checks.
Signed-off-by: Adam Leff <adam@leff.co>
CoreOS is considered a member of the Linux family, and the `host` resource tries
to use `nc` on Linux hosts to test TCP reachability. Unfortunately, `nc` is not
available on CoreOS, but `ncat` is.
This change attempts to use `nc` first, then `ncat` if it's available.
Signed-off-by: Adam Leff <adam@leff.co>
* Fix host resolution on Darwin, use dig wherever possible
The `host` and `dig` commands do not return non-zero if a query returns NXDOMAIN
or NOERROR, but the DarwinHostProvider was expecting it when deciding whether to
fall back to IPv4 if a IPv6 query failed. Therefore, the `host` resource would
not function properly when resolving hostnames on Darwin. The logic has been
changed to use `dig` short output and query for both v6 and v4 addresses.
Additionally, the LinuxHostProvider has been modified to prefer `dig` if it's
available to keep behavior similar between Darwin and Linux whenever possible.
This has the added benefit of providing v6 and v4 resolution if possible where
`getent hosts` only returns v6 if v6 records exist.
Signed-off-by: Adam Leff <adam@leff.co>
* Add TCP reachability support on Linux for host resource
This enhances the `host` resource on Linux targets by using netcat
(if installed) to perform TCP reachability checks.
Signed-off-by: Adam Leff <adam@leff.co>
* documentation updates
Signed-off-by: Adam Leff <adam@leff.co>
* Appease rubocop
Signed-off-by: Adam Leff <adam@leff.co>
