NAME

SYNOPSIS

DESCRIPTION

The command line options are:

-c configfile

Use configfile as the configuration file.

-d

Print debugging messages.

-D

Even more debugging information is printed.

-f

Foreground mode (useful when debugging). Although dhcp6c usually prints warning, debugging, or error messages to syslog(8), it prints the messages to standard error if this option is specified.

-i

Info-req mode. In this mode, stateless DHCPv6 is executed with the folllowing configuration, and the obtained info is written to stdout. After this output, dhcp6c is terminated. (suits for a use in shell-script etc).

 interface (interface given in the argument) {
	information-only;
	script (a script which displays the received information to stdout);
 };
    

Since the configuration is internally generated, you cannot provide a configuration in this mode. If you want to have different actions for the stateless DHCPv6 information, you should write an appropriate configuration and invoke dhcp6c without this option.

-n

Prevent Release message from being sent to DHCPv6 server when dhcp6c stops. This is useful for preventing a new address from being configured by the DHCPv6 server when restarting the DHCPv6 client.

-p pid-file

Use pid-file to dump the process ID of dhcp6c.

The program will daemonize itself on invocation unless the -f or -i option is specified.

Upon receipt of a SIGHUP, SIGTERM, or SIGUSR1 signal, dhcp6c will remove all stateful resources from the system. After that, SIGHUP reinitializes the daemon, and SIGTERM stops the daemon. In both cases, DHCPv6 Release message will be sent to release resources assigned from servers. SIGUSR1 stops the daemon as SIGTERM does though DHCPv6 Release message will not be sent.

FILES

/var/run/dhcp6c.pid

is the default file that contains pid of the currently running dhcp6c.

/usr/local/etc/dhcp6c.conf

is the default configuration file.

/var/db/dhcp6c_duid

is the file to store the client's DUID.

Configuration Script

REASON

The reason why the script is invoked. One of the following values is set based on a message which the client sent before the REPLY message arrives:

INFOREQ

The client sent an INFORMATION REQUEST message.

REQUEST

The client sent a REQUEST message.

RENEW

The client sent a RENEW message.

REBIND

The client sent a REBIND message.

RELEASE

The client sent a RELEASE message.

EXIT

This happens when dhcp6c exits.

new_domain_name_servers

A list of available DNS servers, each of which is an IPv6 numeric address and is separated by a white space character.

new_domain_name

A list of DNS names, which provides DNS name search path.

new_ntp_servers

A list of available NTP servers, each of which is an IPv6 numeric address and is separated by a white space character.

new_sip_servers

A list of available SIP server addresses, each of which is an IPv6 numeric address and is separated by a white space character.

new_sip_name

A list of SIP server domain names.

new_nis_servers

A list of available NIS server addresses, each of which is an IPv6 numeric address and is separated by a white space character.

new_nis_name

A list of NIS domain names.

new_nisp_servers

A list of available NIS+ server addresses, each of which is an IPv6 numeric address and is separated by a white space character.

new_nisp_name

A list of NIS+ domain names.

new_bcmcs_servers

A list of available BCMCS server addresses, each of which is an IPv6 numeric address and is separated by a white space character.

new_bcmcs_name

A list of BCMCS server domain names.

Note that the daemon does not always provide all the parameters. It sets an environment variable only when the corresponding configuration parameter is provided by the DHCPv6 server.

SEE ALSO

Ralph Droms, Editor, Dynamic Host Configuration Protocol for IPv6 (DHCPv6), RFC 3315, 2003.

HISTORY

BUGS

Information Refresh Time Option is not recognied in Info-req mode, since dhcp6c terminates after it receives a REPLY message.