▼ |  | Net: Networking Libraries

1 | HTTP Client
2 | URLs and HTTP
3 | URI Codec: Encoding and Decoding URIs
4 | FTP: Client
5 | Send URL: Opening a Web Browser
6 | SMTP: Sending E-Mail
7 | sendmail: Sending E-Mail
8 | Headers: Parsing and Constructing
9 | Header Field Encoding
10 | IMAP: Reading Mail
11 | POP3: Reading Mail
12 | MIME: Decoding Internet Data
13 | Base 64: Encoding and Decoding
14 | Quoted-Printable: Encoding and Decoding
15 | DNS: Domain Name Service Queries
16 | NNTP: Newsgroup Protocol
17 | TCP: Unit and Signature
18 | TCP Redirect: tcp^ via Channels
19 | SSL Unit: tcp^ via SSL
20 | CGI Scripts
21 | Cookie: Legacy HTTP Client Storage
22 | Git Repository Checkout
| Bibliography
| Index

► | 17 | TCP: Unit and Signature

17.1 | TCP Signature
17.2 | TCP Unit

On this page:

17.1`` TCP Signature
tcp^
tcp-listen
tcp-connect
tcp-connect/ enable-break
tcp-accept
tcp-accept/ enable-break
tcp-accept-ready?
tcp-close
tcp-listener?
tcp-abandon-port
tcp-addresses
17.2`` TCP Unit
tcp@

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### 17`` TCP: Unit and Signature

The net/tcp-sig and net/tcp-unit libraries define a tcp^ signature and tcp@ implementation, where the implementation uses racket/tcp.

Some units in the "net" collection import tcp^, so that they can be used with transports other than plain TCP. For example, url@ imports tcp^.

See also tcp-redirect and make-ssl-tcp@.

#### 17.1`` TCP Signature

(require net/tcp-sig) | package: net-lib

> signature tcp^ : signature

> > > procedure
> > > (tcp-listen |  | port-no |  |  |  |
> > > | [ | max-allow-wait |  |  |  |
> > > |  | reuse? |  |  |  |
> > > |  | hostname]) |  | → |  | tcp-listener?
> > | port-no |  | : |  |
> > (and/c exact-nonnegative-integer?
> > (integer-in 0 65535))
> > max-allow-wait : exact-nonnegative-integer? = 4
> > reuse? : any/c = #f
> > hostname : (or/c string? false/c) = #f

> Like tcp-listen from racket/tcp.

> > > procedure
> > > (tcp-connect |  | hostname |  |  |  |
> > > |  | port-no |  |  |  |
> > > | [ | local-hostname |  |  |  |
> > > |  | local-port-no]) |  | → |  |
> > > input-port? |  | output-port?
> > hostname : string?
> > | port-no |  | : |  |
> > (and/c exact-nonnegative-integer?
> > (integer-in 1 65535))
> > local-hostname : (or/c string? false/c) = #f
> > | local-port-no |  | : |  |
> > (or/c (and/c exact-nonnegative-integer?
> > (integer-in 1 65535))
> > false/c)
> > |  | = |  | #f

> Like tcp-connect from racket/tcp.

> > > procedure
> > > (tcp-connect/enable-break |  | hostname |
> > > |  | port-no |
> > > | [ | local-hostname] |
> > > |  | local-port-no) |
> > | → |  |
> > input-port? |  | output-port?
> > hostname : string?
> > | port-no |  | : |  |
> > (and/c exact-nonnegative-integer?
> > (integer-in 1 65535))
> > local-hostname : (or/c string? false/c) = #f
> > | local-port-no |  | : |  |
> > (or/c (and/c exact-nonnegative-integer?
> > (integer-in 1 65535))
> > false/c)

> Like tcp-connect/enable-break from racket/tcp.

> > > procedure
> > > (tcp-accept listener) |  | → |  |
> > > input-port? |  | output-port?
> > listener : tcp-listener?

> Like tcp-accept from racket/tcp.

> > > procedure
> > > (tcp-accept/enable-break listener) |  | → |  |
> > > input-port? |  | output-port?
> > listener : tcp-listener?

> Like tcp-accept/enable-break from racket/tcp.

> > procedure (tcp-accept-ready? listener) → boolean?
> > listener : tcp-listener?

> Like tcp-accept-ready? from racket/tcp.

> > procedure (tcp-close listener) → void?
> > listener : tcp-listener?

> Like tcp-close from racket/tcp.

> > procedure (tcp-listener? v) → boolean?
> > v : any/c

> Like tcp-listener? from racket/tcp.

> > procedure (tcp-abandon-port tcp-port) → void?
> > tcp-port : port?

> Like tcp-abandon-port from racket/tcp.

> > procedure (tcp-addresses tcp-port [port-numbers?])
> > | → |  |
> > (or/c (values string? string?)
> > (values string? (integer-in 1 65535)
> > string? (integer-in 1 65535)))
> > tcp-port : port?
> > port-numbers? : any/c = #f

> Like tcp-addresses from racket/tcp.

#### 17.2`` TCP Unit

(require net/tcp-unit) | package: net-lib

> value tcp@ : unit?

Imports nothing and exports tcp^, implemented using racket/tcp.
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