▼ |  | Net: Networking Libraries

1 | URLs and HTTP
2 | URI Codec: Encoding and Decoding URIs
3 | Web Socket
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 | IMAP: Reading Mail
10 | POP3: Reading Mail
11 | MIME: Decoding Internet Data
12 | Base 64: Encoding and Decoding
13 | Quoted-Printable: Encoding and Decoding
14 | DNS: Domain Name Service Queries
15 | NNTP: Newsgroup Protocol
16 | TCP: Unit and Signature
17 | TCP Redirect: tcp^ via Channels
18 | SSL Unit: tcp^ via SSL
19 | CGI Scripts
20 | Cookie: HTTP Client Storage
| Bibliography
| Index

► | 16 | TCP: Unit and Signature

16.1 | TCP Signature
16.2 | TCP Unit

On this page:

16.1`` 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
16.2`` TCP Unit
tcp@

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### 16`` 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@.

#### 16.1`` TCP Signature

(require net/tcp-sig)

> > signature

> > tcp^ : signature

> > > procedure

> > > (tcp-listen |  | port-no |  |  |  |
> > > | [ | max-allow-wait |  |  |  |
> > > |  | reuse? |  |  |  |
> > > |  | hostname]) |  | → |  | tcp-listener?

> > port-no

> > :

> > (and/c exact-nonnegative-integer?
> > (integer-in 1 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.

#### 16.2`` TCP Unit

(require net/tcp-unit)

> > value

> > tcp@ : unit?

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