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Manual Reference Pages  -  NET::SSH::PERL::CONSTANTS (3)

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NAME

Net::SSH::Perl::Constants - Exportable constants

CONTENTS

SYNOPSIS



    use Net::SSH::Perl::Constants qw( constants );



DESCRIPTION

Net::SSH::Perl::Constants provides a list of common and useful constants for use in communicating with an sshd server, etc.

None of the constants are exported by default; you have to explicitly ask for them. Some of the constants are grouped into bundles that you can grab all at once, or you can just take the individual constants, one by one.

If you wish to import a group, your use statement should look something like this:



    use Net::SSH::Perl::Constants qw( :group );



Here are the groups:
o msg

All of the MSG constants. In the SSH packet layer protocol, each packet is identified by its type; for example, you have a packet type for starting RSA authentication, a different type for sending a command, etc. The MSG constants are used when creating a new packet, then:



    my $packet = $ssh->packet_start( I<msg_constant> );



See the Net::SSH::Perl::Packet and Net::SSH::Perl docs for details.

Net::SSH::Perl doesn’t support all of the features of the ssh client, so it doesn’t need all of its MSG constants. For a full list of such constants, and an explanation of each, see the SSH RFC.

Here’s the list of MSG constants supported by Net::SSH::Perl: SSH_MSG_NONE, SSH_MSG_DISCONNECT, SSH_SMSG_PUBLIC_KEY, SSH_CMSG_SESSION_KEY, SSH_CMSG_USER, SSH_CMSG_AUTH_RHOSTS, SSH_CMSG_AUTH_RSA, SSH_SMSG_AUTH_RSA_CHALLENGE, SSH_CMSG_AUTH_RSA_RESPONSE, SSH_CMSG_AUTH_PASSWORD, SSH_CMSG_EXEC_SHELL, SSH_CMSG_EXEC_CMD, SSH_SMSG_SUCCESS, SSH_SMSG_FAILURE, SSH_CMSG_STDIN_DATA, SSH_SMSG_STDOUT_DATA, SSH_SMSG_STDERR_DATA, SSH_CMSG_EOF, SSH_SMSG_EXITSTATUS, SSH_MSG_IGNORE, SSH_CMSG_EXIT_CONFIRMATION, SSH_CMSG_AUTH_RHOSTS_RSA, SSH_MSG_DEBUG, SSH_CMSG_REQUEST_COMPRESSION.

o hosts

The HOST constants: HOST_OK, HOST_NEW, and HOST_CHANGED. These are returned from the _check_host_in_hostfile routine in Net::SSH::Perl::Util. See those docs for that routine for an explanation of the meaning of these constants.

o agent

The AGENT constants, used when talking to an authentication agent: SSH_AGENTC_REQUEST_RSA_IDENTITIES, SSH_AGENT_RSA_IDENTITIES_ANSWER, SSH_AGENTC_RSA_CHALLENGE, SSH_AGENT_RSA_RESPONSE, SSH_AGENT_FAILURE, SSH_AGENT_SUCCESS, SSH2_AGENTC_REQUEST_IDENTITIES, SSH2_AGENT_IDENTITIES_ANSWER, SSH2_AGENTC_SIGN_REQUEST, SSH2_AGENT_SIGN_RESPONSE.

Other exportable constants, not belonging to a group, are:
o PROTOCOL_MAJOR
o PROTOCOL_MINOR

These two constants describe the version of the protocol supported by this SSH client (ie., Net::SSH::Perl). They’re used when identifying the client to the server and vice versa.

o PRIVATE_KEY_ID_STRING

A special ID string written to private key files; if the ID string in the file doesn’t match this, we stop reading the private key file.

o MAX_PACKET_SIZE

The maximum size of a packet in the packet layer.

AUTHOR & COPYRIGHTS

Please see the Net::SSH::Perl manpage for author, copyright, and license information.
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perl v5.20.3 NET::SSH::PERL::CONSTANTS (3) 2015-09-12

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