astra/doggo
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feat: Add support for reverse DNS lookups

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Closes https://github.com/mr-karan/doggo/issues/25
This commit is contained in:
Karan Sharma 2021-06-25 17:25:04 +05:30
parent e5acf1214c
commit 9e3656fae9
5 changed files with 36 additions and 3 deletions
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10
cmd/doggo/cli/cli.go
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@ -37,6 +37,7 @@ func main() {
f.StringSliceP("type", "t", []string{}, "Type of DNS record to be queried (A, AAAA, MX etc)")
f.StringSliceP("class", "c", []string{}, "Network class of the DNS record to be queried (IN, CH, HS etc)")
f.StringSliceP("nameservers", "n", []string{}, "Address of the nameserver to send packets to")
f.BoolP("reverse", "x", false, "Performs a DNS Lookup for an IPv4 or IPv6 address. Sets the query type and class to PTR and IN respectively.")
// Resolver Options
f.Int("timeout", 5, "Sets the timeout for a query to T seconds. The default timeout is 5 seconds.")
@ -94,6 +95,15 @@ func main() {
app.QueryFlags.QClasses = append(app.QueryFlags.QClasses, qc...)
app.QueryFlags.QNames = append(app.QueryFlags.QNames, qn...)
// Check if reverse flag is passed. If it is, then set
// query type as PTR and query class as IN.
// Modify query name like 94.2.0.192.in-addr.arpa if it's an IPv4 address.
// Use IP6.ARPA nibble format otherwise.
if app.QueryFlags.ReverseLookup {
app.ReverseLookup()
}
// Load fallbacks.
app.LoadFallbacks()

1
cmd/doggo/cli/help.go
View file

@ -43,6 +43,7 @@ var appHelpTextTemplate = `{{ "NAME" | color "" "heading" }}:
{{"-t, --type=TYPE" | color "yellow" ""}} Type of the DNS Record ({{"A, MX, NS" | color "cyan" ""}} etc).
{{"-n, --nameserver=ADDR" | color "yellow" ""}} Address of a specific nameserver to send queries to ({{"9.9.9.9, 8.8.8.8" | color "cyan" ""}} etc).
{{"-c, --class=CLASS" | color "yellow" ""}} Network class of the DNS record ({{"IN, CH, HS" | color "cyan" ""}} etc).
{{"-x, --reverse" | color "yellow" ""}} Performs a DNS Lookup for an IPv4 or IPv6 address. Sets the query type and class to PTR and IN respectively.
{{ "Resolver Options" | color "" "heading" }}:
{{"--ndots=INT" | color "yellow" ""}} Specify ndots parameter. Takes value from /etc/resolv.conf if using the system namesever or 1 otherwise.