1COAP-SERVER(5)                coap-server Manual                COAP-SERVER(5)
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NAME

6       coap-server - CoAP Server based on libcoap
7

SYNOPSIS

9       coap-server [-d max] [-g group] [-l loss] [-p port] [-v num] [-A
10       address] [-N] [[-k key] [-h hint]] [[-c certfile] [-n] [-C cafile] [-R
11       root_cafile]]
12

DESCRIPTION

14       coap-server is an example server for the 'Constrained Application
15       Protocol` (RFC 7252).
16

OPTIONS - GENERAL

18       -d max
19           Enable support for creation of dynamic resources when doing a PUT
20           up to a limit of max. If max is reached, a 4.06 code is returned
21           until one of the dynamic resources has been deleted.
22
23       -g group
24           Join specified multicast group on startup.
25
26       -p port
27           The port on the given address will be listening for incoming
28           connections. If (D)TLS is supported, then port + 1 will also be
29           listened on for (D)TLS connections. The default port is 5683 if not
30           given any other value.
31
32       -l list
33           Fail to send some datagrams specified by a comma separated list of
34           numbers or number ranges (debugging only).
35
36       -l loss%
37           Randomly failed to send datagams with the specified probability -
38           100% all datagrams, 0% no datagrams (debugging only).
39
40       -v num
41           The verbosity level to use (default 3, maximum is 9). Above 7,
42           there is increased verbosity in GnuTLS and OpenSSL logging.
43
44       -A addr
45           The local address of the interface which the server has to listen.
46
47       -N
48           Send NON-confirmable message for \"observe\" responses. If option
49           -N is not specified, a confirmable response will be sent. Even if
50           set, every fifth response will still be sent as a confirmable
51           response (RFC 7641 requirement).
52

OPTIONS - PSK

54       (If supported by underlying (D)TLS library)
55
56       -h hint
57           Pre-shared key hint to use for inbound connections. The default is
58           CoAP. This cannot be empty if defined.
59
60       -k key
61           Pre-shared key to use for inbound connections. This cannot be empty
62           if defined.  Note: if -c cafile is defined, you need to define -k
63           key as well to have the server support both PSK and PKI.
64

OPTIONS - PKI

66       (If supported by underlying (D)TLS library)
67
68       -c certfile
69           Use the specified PEM file which contains the CERTIFICATE and
70           PRIVATE KEY information.  Note: if -k key is defined, you need to
71           define -c cafile as well to have the server support both PSK and
72           PKI.
73
74       -n
75           Disable the requirement for clients to have defined client
76           certificates
77
78       -C cafile
79           PEM file containing the CA Certificate that was used to sign the
80           certfile defined using -c certfile. If defined, then the client
81           will be given this CA Certificate during the TLS set up.
82           Furthermore, this will trigger the validation of the client
83           certificate. If certfile is self-signed (as defined by -c
84           certfile), then you need to have on the command line the same
85           filename for both the certfile and cafile (as in -c certfile -C
86           certfile) to trigger validation.
87
88       -R root_cafile
89           PEM file containing the set of trusted root CAs that are to be used
90           to validate the server certificate. The -C cafile does not have to
91           be in this list and is "trusted" for the verification.
92           Alternatively, this can point to a directory containing a set of CA
93           PEM files.
94

EXAMPLES

96       ·   Example
97
98           coap-server -A ::1
99
100       Let the server listen on localhost (port 5683).
101
102       ·   Example
103
104           coap-server -A ::1 -k mysecretKey -h myhint
105
106       Let the server listen on localhost (port 5683 and 5684) with the server
107       set up for PSK authentication.
108
109       ·   Example
110
111           coap-server -A ::1 -p 13011
112
113       The same, except the listening port is 13011 (and not the default port
114       5683).
115
116       ·   Example
117
118           coap-server -A 2001:db8:81a8:0:6ef0:dead:feed:beef -v 5
119
120       The listening address is set to 2001:db8:81a8:0:6ef0:dead:feed:beef and
121       the verbosity level is set to 5.
122
123       ·   Example
124
125           coap-server -A 2001:db8:81a8:0:6ef0:dead:feed:beef -g FF02::FD
126
127       Set listening address to 2001:db8:81a8:0:6ef0:dead:feed:beef and join
128       the All CoAP Nodes multicast group FF02::FD.
129

FILES

131       There are no configuration files.
132

EXIT STATUS

134       0
135           Success
136
137       1
138           Failure (syntax or usage error; configuration error; document
139           processing failure; unexpected error)
140

BUGS

142       Please report bugs on the mailing list for libcoap:
143       libcoap-developers@lists.sourceforge.net
144

AUTHORS

146       The libcoap project <libcoap-developers@lists.sourceforge.net>
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150coap-server 4.2.1                 02/24/2020                    COAP-SERVER(5)