diff options
Diffstat (limited to 'html/tcp_table.5.html')
| -rw-r--r-- | html/tcp_table.5.html | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/html/tcp_table.5.html b/html/tcp_table.5.html new file mode 100644 index 0000000..ea8291e --- /dev/null +++ b/html/tcp_table.5.html @@ -0,0 +1,110 @@ +<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> +<html> <head> +<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> +<title> Postfix manual - tcp_table(5) </title> +</head> <body> <pre> +TCP_TABLE(5) TCP_TABLE(5) + +<b>NAME</b> + tcp_table - Postfix client/server table lookup protocol + +<b>SYNOPSIS</b> + <b>postmap -q "</b><i>string</i><b>" <a href="tcp_table.5.html">tcp</a>:</b><i>host:port</i> + + <b>postmap -q - <a href="tcp_table.5.html">tcp</a>:</b><i>host:port</i> <<i>inputfile</i> + +<b>DESCRIPTION</b> + The Postfix mail system uses optional tables for address rewriting or + mail routing. These tables are usually in <b>dbm</b> or <b>db</b> format. Alterna- + tively, table lookups can be directed to a TCP server. + + To find out what types of lookup tables your Postfix system supports + use the "<b>postconf -m</b>" command. + + To test lookup tables, use the "<b>postmap -q</b>" command as described in the + SYNOPSIS above. + +<b>PROTOCOL DESCRIPTION</b> + The TCP map class implements a very simple protocol: the client sends a + request, and the server sends one reply. Requests and replies are sent + as one line of ASCII text, terminated by the ASCII newline character. + Request and reply parameters (see below) are separated by whitespace. + + Send and receive operations must complete in 100 seconds. + +<b>REQUEST FORMAT</b> + The tcp_table protocol supports only the lookup request. The request + has the following form: + + <b>get</b> SPACE <i>key</i> NEWLINE + Look up data under the specified key. + + Postfix will not generate partial search keys such as domain names + without one or more subdomains, network addresses without one or more + least-significant octets, or email addresses without the localpart, + address extension or domain portion. This behavior is also found with + <a href="cidr_table.5.html">cidr</a>:, <a href="pcre_table.5.html">pcre</a>:, and <a href="regexp_table.5.html">regexp</a>: tables. + +<b>REPLY FORMAT</b> + Each reply specifies a status code and text. Replies must be no longer + than 4096 characters including the newline terminator. + + <b>500</b> SPACE <i>text</i> NEWLINE + In case of a lookup request, the requested data does not exist. + The text describes the nature of the problem. + + <b>400</b> SPACE <i>text</i> NEWLINE + This indicates an error condition. The text describes the nature + of the problem. The client should retry the request later. + + <b>200</b> SPACE <i>text</i> NEWLINE + The request was successful. In the case of a lookup request, the + text contains an encoded version of the requested data. + +<b>ENCODING</b> + In request and reply parameters, the character %, each non-printing + character, and each whitespace character must be replaced by %XX, where + XX is the corresponding ASCII hexadecimal character value. The hexadec- + imal codes can be specified in any case (upper, lower, mixed). + + The Postfix client always encodes a request. The server may omit the + encoding as long as the reply is guaranteed to not contain the % or + NEWLINE character. + +<b>SECURITY</b> + Do not use TCP lookup tables for security critical purposes. The + client-server connection is not protected and the server is not authen- + ticated. + +<b>BUGS</b> + Only the lookup method is currently implemented. + + The client does not hang up when the connection is idle for a long + time. + +<b>SEE ALSO</b> + <a href="postmap.1.html">postmap(1)</a>, Postfix lookup table manager + <a href="regexp_table.5.html">regexp_table(5)</a>, format of regular expression tables + <a href="pcre_table.5.html">pcre_table(5)</a>, format of PCRE tables + <a href="cidr_table.5.html">cidr_table(5)</a>, format of CIDR tables + +<b>README FILES</b> + <a href="DATABASE_README.html">DATABASE_README</a>, Postfix lookup table overview + +<b>LICENSE</b> + The Secure Mailer license must be distributed with this software. + +<b>AUTHOR(S)</b> + Wietse Venema + IBM T.J. Watson Research + P.O. Box 704 + Yorktown Heights, NY 10598, USA + + Wietse Venema + Google, Inc. + 111 8th Avenue + New York, NY 10011, USA + + TCP_TABLE(5) +</pre> </body> </html> |