Proxy

API for Proxies. More...

Collaboration diagram for Proxy:

Data Structures
struct	coap_proxy_server_t
struct	coap_proxy_server_list_t

Typedefs
typedef struct coap_proxy_server_t	coap_proxy_server_t
typedef struct coap_proxy_server_list_t	coap_proxy_server_list_t

Enumerations
enum	coap_proxy_t {   COAP_PROXY_REVERSE , COAP_PROXY_REVERSE_STRIP , COAP_PROXY_FORWARD_STATIC , COAP_PROXY_FORWARD_STATIC_STRIP ,   COAP_PROXY_FORWARD_DYNAMIC , COAP_PROXY_FORWARD_DYNAMIC_STRIP , COAP_PROXY_FORWARD = COAP_PROXY_FORWARD_STATIC , COAP_PROXY_FORWARD_STRIP = COAP_PROXY_FORWARD_STATIC_STRIP ,   COAP_PROXY_DIRECT = COAP_PROXY_FORWARD_DYNAMIC , COAP_PROXY_DIRECT_STRIP = COAP_PROXY_FORWARD_DYNAMIC_STRIP }

Functions
int	coap_verify_proxy_scheme_supported (coap_uri_scheme_t scheme)
	Verify that the CoAP Scheme is supported for an ongoing proxy connection.
int COAP_API	coap_proxy_forward_request (coap_session_t *req_session, const coap_pdu_t *request, coap_pdu_t *response, coap_resource_t *resource, coap_cache_key_t *cache_key, coap_proxy_server_list_t *server_list)
	Forward incoming request upstream to the next proxy/server.
coap_response_t COAP_API	coap_proxy_forward_response (coap_session_t *rsp_session, const coap_pdu_t *received, coap_cache_key_t **cache_key)
	Forward the returning response back to the appropriate client.

Detailed Description

API for Proxies.

Typedef Documentation

coap_proxy_server_list_t

typedef struct coap_proxy_server_list_t coap_proxy_server_list_t

coap_proxy_server_t

typedef struct coap_proxy_server_t coap_proxy_server_t

Enumeration Type Documentation

coap_proxy_t

enum coap_proxy_t

Enumerator
COAP_PROXY_REVERSE	Act as a reverse proxy.
COAP_PROXY_REVERSE_STRIP	Act as a reverse proxy, strip out proxy options.
COAP_PROXY_FORWARD_STATIC	Act as a forward-static proxy.
COAP_PROXY_FORWARD_STATIC_STRIP	Act as a forward-static proxy, strip out proxy options.
COAP_PROXY_FORWARD_DYNAMIC	Act as a forward-dynamic proxy using the request's Proxy-Uri or Proxy-Scheme options to determine server.
COAP_PROXY_FORWARD_DYNAMIC_STRIP	Act as a forward-dynamic proxy, strip out proxy options.
COAP_PROXY_FORWARD
COAP_PROXY_FORWARD_STRIP
COAP_PROXY_DIRECT
COAP_PROXY_DIRECT_STRIP

Definition at line 27 of file coap_proxy.h.

Function Documentation

coap_proxy_forward_request()

int COAP_API coap_proxy_forward_request	(	coap_session_t *	req_session,
		const coap_pdu_t *	request,
		coap_pdu_t *	response,
		coap_resource_t *	resource,
		coap_cache_key_t *	cache_key,
		coap_proxy_server_list_t *	server_list )

Forward incoming request upstream to the next proxy/server.

Possible scenarios: Acting as a reverse proxy - connect to defined internal server (possibly round robin load balancing over multiple servers). Acting as a forward-dynamic proxy - connect to host defined in Proxy-Uri or Proxy-Scheme with Uri-Host (and maybe Uri-Port). Acting as a forward-static proxy - connect to defined upstream server (possibly round robin load balancing over multiple servers).

A request that should go direct to this server is not supported here.

Parameters

req_session	The client session.
request	The client's request PDU.
response	The response PDU that will get sent back to the client.
resource	The resource associated with this request.
cache_key	A cache key generated from the request PDU or NULL.
server_list	The upstream server list to connect to.

Returns

1 if success, or 0 if failure (response code set to appropriate value).

Definition at line 920 of file coap_proxy.c.

coap_proxy_forward_response()

coap_response_t COAP_API coap_proxy_forward_response	(	coap_session_t *	rsp_session,
		const coap_pdu_t *	received,
		coap_cache_key_t **	cache_key )

Forward the returning response back to the appropriate client.

Parameters

rsp_session	The upstream session receiving the response.
received	The received PDU.
cache_key	Updated with the cache key pointer provided to coap_proxy_forward_request(). The caller should delete this cache key (unless the client request set up an Observe and there will be unsolicited responses).

Returns

One of COAP_RESPONSE_FAIL or COAP_RESPONSE_OK.

Definition at line 936 of file coap_proxy.c.

coap_verify_proxy_scheme_supported()

int coap_verify_proxy_scheme_supported

(

coap_uri_scheme_t

scheme

)

Verify that the CoAP Scheme is supported for an ongoing proxy connection.

Parameters

scheme

The CoAP scheme to check.

Returns

1 if supported, or 0 if not supported.

Definition at line 946 of file coap_proxy.c.