Name	Size	Mode	Actions
CHANGELOG.md	4189	0644	editdlrm
dns.html	4752	0644	editdlrm
ftp.html	9599	0644	editdlrm
http.html	11865	0644	editdlrm
index.html	4431	0644	editdlrm
installation.html	3881	0644	editdlrm
introduction.html	12433	0644	editdlrm
ltn12.html	11483	0644	editdlrm
luasocket.png	11732	0644	editdlrm
mime.html	14246	0644	editdlrm
README.md	939	0644	editdlrm
reference.css	975	0644	editdlrm
reference.html	7928	0644	editdlrm
smtp.html	14621	0644	editdlrm
socket.html	14704	0644	editdlrm
tcp.html	24022	0644	editdlrm
udp.html	18727	0644	editdlrm
url.html	8430	0644	editdlrm

DNS

IPv4 name resolution functions dns.toip and dns.tohostname return all information obtained from the resolver in a table of the form:

resolved4 = {
  name = canonic-name,
  alias = alias-list,
  ip = ip-address-list
}

Note that the alias list can be empty.

The more general name resolution function dns.getaddrinfo, which supports both IPv6 and IPv4, returns all information obtained from the resolver in a table of the form:

resolved6 = {
  [1] = {
    family = family-name-1,
    addr = address-1
  },
  ...
  [n] = {
    family = family-name-n,
    addr = address-n
  }
}

Here, family contains the string "inet" for IPv4 addresses, and "inet6" for IPv6 addresses.

socket.dns.getaddrinfo(address)

Converts from host name to address.

Address can be an IPv4 or IPv6 address or host name.

The function returns a table with all information returned by the resolver. In case of error, the function returns nil followed by an error message.

socket.dns.gethostname()

Returns the standard host name for the machine as a string.

socket.dns.tohostname(address)

Converts from IPv4 address to host name.

Address can be an IP address or host name.

The function returns a string with the canonic host name of the given address, followed by a table with all information returned by the resolver. In case of error, the function returns nil followed by an error message.

socket.dns.toip(address)

Converts from host name to IPv4 address.

Address can be an IP address or host name.

Returns a string with the first IP address found for address, followed by a table with all information returned by the resolver. In case of error, the function returns nil followed by an error message.