Module wire 

Wire helpers for the classic inetd services: Echo (RFC 862), Discard (RFC 863), Chargen (RFC 864), QOTD (RFC 865), Daytime (RFC 867) and Time (RFC 868).

Constants

IO_TIMEOUT

Write and per-reply deadline.

MAX_CHARGEN_LINE

Upper bound on a chargen line.

MAX_CHARGEN_UDP

RFC 864: a UDP chargen reply is between 0 and 512 characters.

MAX_DAYTIME_CHARS

Daytime text a handler may supply.

MAX_QUOTE_CHARS

RFC 865: a quote should be limited to 512 characters.

MAX_STREAM_REPLY

Bytes a client reads from a stream service (Daytime, QOTD, Time) before giving up.

READ_CHUNK

One TCP read, and the largest UDP datagram accepted.

SECONDS_1900_TO_1970

Seconds between 1900-01-01 and 1970-01-01 (RFC 868).

Functions

chargen_line

Line n of the rotating chargen pattern: width characters starting n into the set.

charset

Validate a handler’s chargen character set: printable ASCII, 1 to 95 characters.

conforms_to_chargen

Whether text follows the rotating pattern of charset (any starting offset, any width).

daytime_now

RFC 867 suggests “Weekday, Month Day, Year HH:MM:SS-ZONE”.

decode

Bytes from an action’s data and encoding (utf8, the default, or hex).

default_charset

The RFC 864 character set: the 95 printable ASCII characters, space first.

describe_time

Describe a received RFC 868 value for a handler.

encode

Data for an event: text when it is printable UTF-8, hex otherwise, with the encoding named.

line

Handler text for a reply line: no control characters, at most limit characters.

requested_time

Unix seconds from a handler’s time_reply: unix_seconds, iso8601, or now.

time_bytes

RFC 868 time: seconds since 1900 as a 32-bit big-endian number (wrapping in 2036).