NAME

       coap-rd, coap-rd-gnutls, coap-rd-mbedtls, coap-rd-openssl, coap-rd-notls - A CoAP Resource
       Directory based on libcoap

SYNOPSIS

       coap-rd [-g group] [-G group_if] [-p port] [-v num] [-A address] [[-h hint] [-k key]] [[-c
       certfile] [-n] [-C cafile] [-R trusted_casfile]]

       For coap-rd versions that use libcoap compiled for different (D)TLS libraries,
       coap-rd-notls, coap-rd-gnutls, coap-rd-openssl, coap-rd-mbedtls or coap-rd-tinydtls may be
       available. Otherwise, coap-rd uses the default libcoap (D)TLS support.

DESCRIPTION

       coap-rd is a simple CoAP Resource Directory server that can handle resource registrations
       using the protocol CoAP (RFC 7252).

OPTIONS

       -g group
           Join specified multicast group on startup.  Note: DTLS over multicast is not currently
           supported.

       -G group_if
           Use this interface for listening for the multicast group. This can be different from
           the implied interface if the -A option is used.

       -p port
           The port on the given address will be listening for incoming connections. If (D)TLS is
           supported, then port + 1 will also be listened on for (D)TLS connections. The default
           port is 5683 if not given any other value.

       -v num
           The verbosity level to use (default: 3, maximum is 9). Above 7, there is increased
           verbosity in GnuTLS and OpenSSL logging.

       -A address
           The local address of the interface which the server has to listen on.

OPTIONS - PSK

       (If supported by underlying (D)TLS library)

       -h hint
           Identity Hint to send. Default is CoAP. Zero length is no hint.

       -k key
           Pre-shared key to use for inbound connections. This cannot be empty if defined.  Note:
           if -c cafile is defined, you need to define -k key as well to have the server support
           both PSK and PKI.

OPTIONS - PKI

       (If supported by underlying (D)TLS library)

       -c certfile
           Use the specified PEM file which contains the CERTIFICATE and PRIVATE KEY information.
           Note: if -k key is defined, you need to define -c certfile as well to have the server
           support both PSK and PKI.

       -n
           Disable remote peer certificate checking. This gives clients the ability to use PKI,
           but without any defined certificates.

       -C cafile
           PEM file that contains a list of one or more CAs that are to be passed to the client
           for the client to determine what client certificate to use. Normally, this list of CAs
           would be the root CA and and any intermediate CAs. Ideally the server certificate
           should be signed by the same CA so that mutual authentication can take place. The
           contents of cafile are added to the trusted store of root CAs. Using the -C or -R
           options will will trigger the validation of the client certificate unless overridden
           by the -n option.

       -R trust_casfile
           PEM file containing the set of trusted root CAs that are to be used to validate the
           client certificate. Alternatively, this can point to a directory containing a set of
           CA PEM files. The -C cafile CA does not have to be in this list and is trusted for the
           validation. Using -R trust_casfile disables common CA mutual authentication which can
           only be done by using -C cafile. Using the -C or -R options will will trigger the
           validation of the server certificate unless overridden by the -n option.

EXAMPLES

       •   Example

           coap-rd -A ::1

       Let the server listen on localhost (port 5683).

       •   Example

           coap-rd -A ::1 -k mysecretKey -h myhint

       Let the server listen on localhost (port 5683 and 5684) with the server set up for PSK
       authentication.

       •   Example

           coap-rd -A ::1 -p 13011

       Quite the same, except listening port is 13011 (and not the default port 5683).

       •   Example

           coap-rd -A 2001:db8:81a8:0:6ef0:dead:feed:beef  -v 5

       The listening address is set to 2001:db8:81a8:0:6ef0:dead:feed:beef and the verbosity
       level is set to 5.

       •   Example

           coap-rd -A 2001:db8:81a8:0:6ef0:dead:feed:beef  -g FF02::FD

       Set listening address to 2001:db8:81a8:0:6ef0:dead:feed:beef and join the All CoAP Nodes
       multicast group FF02::FD.

FILES

       There are no configuration files.

EXIT STATUS

       0
           Success

       1
           Failure (syntax or usage error; configuration error; document processing failure;
           unexpected error)

BUGS

       Please report bugs on the mailing list for libcoap:
       libcoap-developers@lists.sourceforge.net or raise an issue on GitHub at
       https://github.com/obgm/libcoap/issues

AUTHORS

       The libcoap project <libcoap-developers@lists.sourceforge.net>