▼ |  | Net: Racket Networking Libraries

1 | URLs and HTTP
2 | URI Codec: Encoding and Decoding URIs
3 | Web Socket
4 | FTP: Client Downloading
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 scheme/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 )

tcp^ : signature

> ( 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 scheme/tcp.

> ( 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 scheme/tcp.

> ( 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 scheme/tcp.

> ( tcp-accept listener)

> →

> input-port? |  | output-port?

> listener : tcp-listener?

> Like tcp-accept from scheme/tcp.

> ( tcp-accept/enable-break listener)

> →

> input-port? |  | output-port?

> listener : tcp-listener?

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

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

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

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

> Like tcp-close from scheme/tcp.

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

> Like tcp-listener? from scheme/tcp.

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

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

> ( 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 scheme/tcp.

#### 16.2`` TCP Unit

( require net/tcp-unit )

tcp@ : unit?

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