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in.tftpd

, tftpd

- Internet Trivial File Transfer Protocol server

用法概要

in.tftpd [-d] [-T rexmtval] [-s] [homedir]

描述

tftpd is a server that supports the Internet Trivial File Transfer Protocol (TFTP).

Before responding to a request, the server attempts to change its current directory to homedir; the default directory is /tftpboot.

The use of tftp does not require an account or password on the remote system. Due to the lack of authentication information, in.tftpd will allow only publicly readable files to be accessed. Files may be written only if they already exist and are publicly writable. Note that this extends the concept of “public” to include all users on all hosts that can be reached through the network. This may not be appropriate on all systems, and its implications should be considered before enabling this service.

in.tftpd runs with the user ID and group ID set to [GU]ID_NOBODY under the assumption that no files exist with that owner or group. However, nothing checks this assumption or enforces this restriction.

选项

-d

Debug. When specified it sets the SO_DEBUG socket option.

-s

Secure. When specified, the directory change to homedir must succeed. The daemon also changes its root directory to homedir.

-T rexmtval

Specifies the value of the retransmission timeout in seconds. This also affects the maximum session timeout in that the latter is set to five times the retransmission timeout value.

用法

The in.tftpd server is IPv6–enabled. See ip6(7P).

in.tftpd supports transfers of greater than 32 MB, per RFC 2348.

属性

See attributes(5) for descriptions of the following attributes:

另请参见

svcs(1), tftp(1), inetadm(1M), inetd(1M), svcadm(1M), netconfig(4), attributes(5), smf(5), ip6(7P)

Malkin, G. and Harkin, A. RFC 2347, TFTP Option Extension. The Internet Society. May 1998

Malkin, G. and Harkin, A. RFC 2348, TFTP Blocksize Option. The Internet Society. May 1998

Malkin, G. and Harkin, A. RFC 2349, TFTP Timeout Interval and Transfer Size Options. The Internet Society. May 1998

Sollins, K.R. RFC 1350, The TFTP Protocol (Revision 2). Network Working Group. July 1992.

附注

The tftpd server only acknowledges the transfer size option that is sent with a read request when the octet transfer mode is specified.

The in.tftpd.1m service is managed by the service management facility, smf(5), under the service identifier:

svc:/network/tftp/udp6:default

Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). Responsibility for initiating and restarting this service is delegated to inetd(1M). Use inetadm(1M) to make configuration changes and to view configuration information for this service. The service's status can be queried using the svcs(1) command.

Unlike most smf(5) services, a manifest for the tftp service is not included in the system. To create one and enable this service, the administrator should:

1. Edit /etc/inet/inetd.conf and uncomment the tftp entry.

2. Run /usr/sbin/inetconv.

After you run inetconv, the svc:/network/tftp/udp6:default service is created and enabled.