askmara - do simple dns queries
askmara queries the user-specified dns server for records, and outputs
the reply in a csv2-compatible format (csv2 is the format of zone files
that maradns uses).
askmara [-n] [ -v | -t timeout] query [ server ]
-t If this is present, the following argument is the askmara timeout,
in seconds. Note that askmara can not both have a user-defined
timeout and verbose output.
-v If this is set, askmara will verbosely output the complete reply
that the server sent. Note that this verbose output is not
-n If this is set, askmara, when sending out a query, will not request
DNS recursion; in other words, askmara will request that the remote
DNS server not contact other DNS servers to answer the query in
dns record to be queried. The query has two sections: The type of
record we desire, and the hostname we want this record for.
The type of query can have two forms: A one-letter mnemonic, or a
numeric rtype followed by a colon. This is immediately concatenated by
the full name of the host name we wish to look up.
For example, to ask for the IP of 'example.com.', we can use the one-
letter mnemonic, in the form 'Aexample.com.', or we can use the numeric
RR followed by a colon, giving the query '1:example.com.' (since A has
the record type of one). Note that the query name needs the trailing
dot at the end.
Askmara supports a handful one-letter mnemonics, as follows:
A signifies a request for an A (ipv4 address) RR
N signifies a NS RR
C signifies that we are asking for a CNAME RR
S signifies that we want a SOA RR
P signifies that we want a PTR RR
@ signifies that we mant a MX RR
T signifies that we want a TXT RR
Z signifies that we want to ask for all RRs.
IP address of the dns server to be queried. If no server is given,
askmara will query 127.0.0.1.
Asking the server with the ip 127.0.0.1 for the IP address of
Asking the server with the ip 22.214.171.124 for the IP address of
askmara Aexample.com. 126.96.36.199
Asking the server with the ip address 127.0.0.1 for the IP address of
example.com, using the rr_number:query format:
Asking the server with the ip address 127.0.0.1 for a SRV record. In
particular, we ask for the "http over tcp" service for example.net.
Since askmara doesn't have a mnemonic for SRV record types, we use the
numeric code (33 for SRV):
Asking the server with the ip address 127.0.0.1 for the AAAA (ipv6 ip)
record for example.net:
Note that the output will be a raw DNS packet in both the SRV and AAAA
When askmara is asked for an SOA record, the output of askmara closely
resembles the format of a csv2 file, but can not be parsed as a csv2
file without modification.
askmara outputs multi-chunk ("character-string") TXT records
incorrectly (it only outputs the first chunk).
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
MaraDNS is written by Sam Trenholme. Jaakko Niemi used 5 minutes to
roll this manpage together, which Sam has subsequently revised.