nsl: DNS query

In pingr: Check if a Remote Computer is Up

DNS query

Description

Perform a DNS query for a domain. It supports custom name servers, and querying DNS records of certain class and type.

Usage

nsl(domain, server = NULL, type = 1L, class = 1L)

Arguments

domain	Domain to query.
server	Custom name server IP address, to use. Note that this must be an IP address currently. E.g. 8.8.8.8 is Google's DNS server.
type	Record type to query, an integer scalar. 1L is an A record, 28L is an AAAA record, etc. See e.g. https://en.wikipedia.org/wiki/List_of_DNS_record_types for the record types.
class	Query class. This is usually 1L, i.e. "Internet". See e.g. https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-2 for all DNS classes.

Value

A list of two entries currently, additional entries might be added later:

• answer: a data frame of DNS records, with columns: name, class, type, ttl, data. data is a list column and contains the IP(6) address for A and AAAA records, but it contains other data, e.g. host name for CNAME, for other records. If pingr could not parse a record (it only parses the most common records types: A, AAAA, NA, PTR, CNAME, TXT, MX, SOA), then the data of the record is included as a raw vector.

• flags: a named logical vector of flags aa, tc, rd, ra, ad, cd. See the RFC (https://www.ietf.org/rfc/rfc1035.txt) for these. On Windows they are all set to NA currently.

Examples

nsl("r-project.org")
nsl("google.com", type = 28L)

pingr documentation built on May 29, 2024, 12:05 p.m.