lua-eco

• Index

Contents

• Functions
• Fields

Modules

• eco
• eco.time
• eco.log
• eco.file
• eco.sys
• eco.sync
• eco.channel
• eco.shared
• eco.uci
• eco.ubus
• eco.socket
• eco.packet
• eco.dns
• eco.ssl
• eco.mqtt
• eco.net
• eco.nl
• eco.genl
• eco.rtnl
• eco.ip
• eco.nl80211
• eco.websocket
• eco.termios
• eco.ssh
• eco.http.server
• eco.http.client
• eco.encoding.hex
• eco.encoding.base64
• eco.hash.md5
• eco.hash.sha1
• eco.hash.sha256
• eco.hash.hmac

Topics

• README

Examples

• channel.lua
• coroutine.lua
• dns.lua
• base64.lua
• hex.lua
• env.lua
• exec.lua
• shell.lua
• dir.lua
• file.lua
• flock.lua
• inotify.lua
• walk.lua
• hmac.lua
• md5.lua
• sha1.lua
• sha256.lua
• hook.lua
• download_file.lua
• get.lua
• post.lua
• post_file.lua
• post_form.lua
• server.lua
• server_multiprocess.lua
• log.lua
• mqtt.lua
• custom-proto.lua
• genl_get_family.lua
• ip-addr-add.lua
• ip-addr-del.lua
• ip-addr-get.lua
• ip-link.lua
• link_del.lua
• link_dump.lua
• link_event.lua
• nl80211_add_interface.lua
• nl80211_del_interface.lua
• nl80211_dump_interface.lua
• nl80211_dump_station.lua
• nl80211_get_freqlist.lua
• nl80211_get_interface.lua
• nl80211_get_station.lua
• nl80211_scan.lua
• nl80211_set_interface.lua
• route_event.lua
• panic_hook.lua
• send-at-command.lua
• shared.lua
• signal.lua
• ping.lua
• ping6.lua
• recver.lua
• sender.lua
• arp-scan.lua
• arping.lua
• capture.lua
• send_tcp.lua
• send_udp.lua
• socketpair_dgram.lua
• socketpair_fork.lua
• socketpair_stream.lua
• client.lua
• server.lua
• client.lua
• server.lua
• client.lua
• dgram_client.lua
• dgram_server.lua
• server.lua
• spawn.lua
• exec.lua
• scp_recv.lua
• scp_send.lua
• client.lua
• server.lua
• cond.lua
• mutex.lua
• wait_group.lua
• termios.lua
• timer.lua
• signatures.lua
• subscribe.lua
• ubus.lua
• client.lua
• server.lua

Module eco.dns

DNS resolver utilities.

This module implements a simple DNS client over UDP.

It resolves names using:

• /etc/hosts first
• then DNS servers from opts.nameservers or /etc/resolv.conf

Functions

query (qname[, opts])	Resolve a DNS name.
type_name (n)	Convert RR type number to its mnemonic.

Fields

TYPE_A	Resource record type: A.
TYPE_NS	Resource record type: NS.
TYPE_CNAME	Resource record type: CNAME.
TYPE_SOA	Resource record type: SOA.
TYPE_PTR	Resource record type: PTR.
TYPE_MX	Resource record type: MX.
TYPE_TXT	Resource record type: TXT.
TYPE_AAAA	Resource record type: AAAA.
TYPE_SRV	Resource record type: SRV.
TYPE_SPF	Resource record type: SPF.
CLASS_IN	DNS class: IN (Internet).
SECTION_AN	DNS answer section: Answer.
SECTION_NS	DNS answer section: Authority.
SECTION_AR	DNS answer section: Additional.

Functions

query (qname[, opts])

Resolve a DNS name.

The return value is an array of answer records. Record table fields depend on the record type. Common fields:

• name, type, class, ttl, section

Type-specific fields include:

• A/AAAA: address
• CNAME: cname
• MX: preference, exchange
• SRV: priority, weight, port, target
• NS: nsdname
• TXT: txt (string or array of strings)
• SPF: spf (string or array of strings)
• PTR: ptrdname
• SOA: mname, rname, serial, refresh, retry, expire, minimum

Parameters:

• qname string Domain name or IP address.
• opts table

  Options:

  • type (int) RR type (default TYPE_A).
  • no_recurse (boolean) Disable recursion desired (RD) flag.
  • nameservers (table) Nameserver list. Each entry can be:
  • "ip" string
  • { ip, port } table
  • mark (number) SO_MARK for the UDP socket.
  • device (string) SO_BINDTODEVICE for the UDP socket.
  (optional)

Returns:

table answers

Or

1. nil On failure.
2. string Error message.

type_name (n)

Convert RR type number to its mnemonic.

Parameters:

• n int RR type number.

Returns:

string

Fields

TYPE_A

Resource record type: A.

TYPE_NS

Resource record type: NS.

TYPE_CNAME

Resource record type: CNAME.

TYPE_SOA

Resource record type: SOA.

TYPE_PTR

Resource record type: PTR.

TYPE_MX

Resource record type: MX.

TYPE_TXT

Resource record type: TXT.

TYPE_AAAA

Resource record type: AAAA.

TYPE_SRV

Resource record type: SRV.

TYPE_SPF

Resource record type: SPF.

CLASS_IN

DNS class: IN (Internet).

SECTION_AN

DNS answer section: Answer.

SECTION_NS

DNS answer section: Authority.

SECTION_AR

DNS answer section: Additional.