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COAP_SUPPORTED(3) libcoap Manual COAP_SUPPORTED(3) NAME coap_supported, coap_af_unix_is_supported, coap_async_is_supported, coap_client_is_supported, coap_dtls_is_supported, coap_dtls_cid_is_sup- ported, coap_dtls_psk_is_supported, coap_dtls_pki_is_supported, coap_dtls_pkcs11_is_supported, coap_dtls_rpk_is_supported, coap_epoll_is_supported, coap_ipv4_is_supported, coap_ipv6_is_supported, coap_observe_persist_is_supported, coap_oscore_is_supported, coap_proxy_is_supported, coap_server_is_supported, coap_tcp_is_supported, coap_threadsafe_is_supported, coap_tls_is_supported, coap_ws_is_supported, coap_wss_is_supported - Work with CoAP runtime functionality SYNOPSIS #include <coap3/coap.h> int coap_af_unix_is_supported(void); int coap_async_is_supported(void); int coap_client_is_supported(void); int coap_dtls_is_supported(void); int coap_dtls_cid_is_supported(void); int coap_dtls_pkcs11_is_supported(void); int coap_dtls_pki_is_supported(void); int coap_dtls_psk_is_supported(void); int coap_dtls_rpk_is_supported(void); int coap_epoll_is_supported(void); int coap_ipv4_is_supported(void); int coap_ipv6_is_supported(void); int coap_observe_persist_is_supported(void); int coap_oscore_is_supported(void); int coap_proxy_is_supported(void); int coap_server_is_supported(void); int coap_tcp_is_supported(void); int coap_threadsafe_is_supported(void); int coap_tls_is_supported(void); int coap_ws_is_supported(void); int coap_wss_is_supported(void); For specific (D)TLS library support, link with -lcoap-3-notls, -lcoap-3-gnutls, -lcoap-3-openssl, -lcoap-3-mbedtls, -lcoap-3-wolfssl or -lcoap-3-tinydtls. Otherwise, link with -lcoap-3 to get the default (D)TLS library support. DESCRIPTION These functions are used to determine run-time support in the libcoap li- brary. libcoap has optional support that can be configured at library compilation time, as well as any underlying (D)TLS may, or may not, have certain func- tionality. The optional #include file <coap3/coap_defines.h>, which is created when- ever ./configure or cmake is run, has a list of #define that were used when the local libcoap library was built and can be used in applications for de- termining what support is available. NOTE: If doing cross-compiling, it is unsafe to use <coap3/coap_defines.h> as the list of #define may not be correct. FUNCTIONS Function: coap_af_unix_is_supported() The coap_af_unix_is_supported() function is used to determine if there is socket type AF_UNIX support, or not, compiled into libcoap. Function: coap_async_is_supported() The coap_async_is_supported() function is used to determine if there is async support, or not, compiled into libcoap. Function: coap_client_is_supported() The coap_client_is_supported() function is used to determine if there is CoAP client support, or not, compiled into libcoap. Function: coap_dtls_is_supported() The coap_dtls_is_supported() function is used to determine if there is DTLS support available with the configured underlying TLS library. Function: coap_dtls_cid_is_supported() The coap_dtls_cid_is_supported() function is used to determine if there is Connection-ID (CID) support available with the configured underlying TLS library. Function: coap_dtls_pkcs11_is_supported() The coap_dtls_pkcs11_is_supported() function is used to determine if there is PKCS11 support available with the configured underlying TLS library. Function: coap_dtls_pki_is_supported() The coap_dtls_pki_is_supported() function is used to determine if there is PKI support available with the configured underlying TLS library. Function: coap_dtls_psk_is_supported() The coap_dtls_psk_is_supported() function is used to determine if there is PSK support available with the configured underlying TLS library. Function: coap_dtls_rpk_is_supported() The coap_dtls_rpk_is_supported() function is used to determine if there is RPK support available with the configured underlying TLS library. Function: coap_epoll_is_supported() The coap_epoll_is_supported() function is used to determine if there is epoll support, or not, compiled into libcoap. Function: coap_ipv4_is_supported() The coap_ipv4_is_supported() function is used to determine if there is IPv4 support, or not, compiled into libcoap. Function: coap_ipv6_is_supported() The coap_ipv6_is_supported() function is used to determine if there is IPv6 support, or not, compiled into libcoap. Function: coap_observe_persist_is_supported() The coap_observe_persist_is_supported() function is used to determine if there is Observe persist support, or not, compiled into libcoap. Function: coap_oscore_is_supported() The coap_oscore_is_supported() function is used to determine if there is oscore support, or not, compiled into libcoap. Function: coap_proxy_is_supported() The coap_proxy_is_supported() function is used to determine if there is proxy code support, or not, compiled into libcoap. Function: coap_server_is_supported() The coap_server_is_supported() function is used to determine if there is CoAP server support, or not, compiled into libcoap. Function: coap_tcp_is_supported() The coap_tcp_is_supported() function is used to determine if there is TCP support, or not, compiled into libcoap. Function: coap_threadsafe_is_supported() The coap_threadsafe_is_supported() function is used to determine if there is thread safe support, or not, compiled into libcoap. Function: coap_tls_is_supported() The coap_tls_is_supported() function is used to determine if there is TLS support available with the configured underlying TLS library. Function: coap_ws_is_supported() The coap_ws_is_supported() function is used to determine if there is Web- Sockets support, or not, compiled into libcoap. Function: coap_wss_is_supported() The coap_wss_is_supported() function is used to determine if there is Se- cuere WebSockets support, or not, compiled into libcoap. RETURN VALUES coap_af_unix_is_supported(), coap_async_is_supported(), coap_client_is_sup- ported(), coap_dtls_is_supported(), coap_dtls_cid_is_sup- ported(),coap_dtls_pkcs11_is_supported(), coap_dtls_pki_is_supported(), coap_dtls_psk_is_supported(), coap_dtls_rpk_is_supported(), coap_epoll_is_supported(), coap_ipv4_is_supported(), coap_ipv6_is_sup- ported(), coap_observe_persist_is_supported(), coap_oscore_is_supported(), coap_proxy_is_supported(), coap_server_is_supported(), coap_tcp_is_sup- ported(), coap_threadsafe_is_supported(), coap_tls_is_supported(), coap_ws_is_supported() and coap_wss_is_supported() return 0 if there is no support, 1 if support is available. SEE ALSO coap_async(3), coap_io(3), coap_locking(3), coap_oscore(3), coap_proxy(3), coap_tls_library(3) and coap_websockets(3). FURTHER INFORMATION See "RFC7252: The Constrained Application Protocol (CoAP)" "RFC8323: CoAP (Constrained Application Protocol) over TCP, TLS, and Web- Sockets" for further information. BUGS Please raise an issue on GitHub at https://github.com/obgm/libcoap/issues to report any bugs. Please raise a Pull Request at https://github.com/obgm/libcoap/pulls for any fixes. AUTHORS The libcoap project <libcoap-developers@lists.sourceforge.net> coap_supported 4.3.5 08/02/2026 COAP_SUPPORTED(3)
NAME | SYNOPSIS | DESCRIPTION | FUNCTIONS | RETURN VALUES | SEE ALSO | FURTHER INFORMATION | BUGS | AUTHORS
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