Update Files

Kinc/Sources/kinc/libs/secure-streams/system/fetch-policy/fetch-policy.c

@@ -0,0 +1,170 @@
+/*
+ * Policy fetching for Secure Streams
+ *
+ * libwebsockets - small server side websockets and web server implementation
+ *
+ * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <private-lib-core.h>
+
+typedef struct ss_fetch_policy {
+	struct lws_ss_handle 	*ss;
+	void			*opaque_data;
+	/* ... application specific state ... */
+
+	lws_sorted_usec_list_t	sul;
+
+	uint8_t			partway;
+} ss_fetch_policy_t;
+
+/* secure streams payload interface */
+
+static lws_ss_state_return_t
+ss_fetch_policy_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
+{
+	ss_fetch_policy_t *m = (ss_fetch_policy_t *)userobj;
+	struct lws_context *context = (struct lws_context *)m->opaque_data;
+
+	if (flags & LWSSS_FLAG_SOM) {
+		if (lws_ss_policy_parse_begin(context, 0))
+			return LWSSSSRET_OK;
+		m->partway = 1;
+	}
+
+	if (len && lws_ss_policy_parse(context, buf, len) < 0)
+		return LWSSSSRET_OK;
+
+	if (flags & LWSSS_FLAG_EOM)
+		m->partway = 2;
+
+	return LWSSSSRET_OK;
+}
+
+static lws_ss_state_return_t
+ss_fetch_policy_tx(void *userobj, lws_ss_tx_ordinal_t ord, uint8_t *buf,
+		   size_t *len, int *flags)
+{
+	return LWSSSSRET_TX_DONT_SEND;
+}
+
+static void
+policy_set(lws_sorted_usec_list_t *sul)
+{
+	ss_fetch_policy_t *m = lws_container_of(sul, ss_fetch_policy_t, sul);
+	struct lws_context *context = (struct lws_context *)m->opaque_data;
+
+	/*
+	 * We get called if the policy parse was successful, just after the
+	 * ss connection close that was using the vhost from the old policy
+	 */
+
+	lws_ss_destroy(&m->ss);
+
+	if (lws_ss_policy_set(context, "updated"))
+		lwsl_err("%s: policy set failed\n", __func__);
+	else {
+		context->policy_updated = 1;
+#if defined(LWS_WITH_SYS_STATE)
+		lws_state_transition_steps(&context->mgr_system,
+					   LWS_SYSTATE_OPERATIONAL);
+#endif
+	}
+}
+
+static lws_ss_state_return_t
+ss_fetch_policy_state(void *userobj, void *sh, lws_ss_constate_t state,
+		      lws_ss_tx_ordinal_t ack)
+{
+	ss_fetch_policy_t *m = (ss_fetch_policy_t *)userobj;
+	struct lws_context *context = (struct lws_context *)m->opaque_data;
+
+	lwsl_info("%s: %s, ord 0x%x\n", __func__, lws_ss_state_name((int)state),
+		  (unsigned int)ack);
+
+	switch (state) {
+	case LWSSSCS_CREATING:
+		return lws_ss_request_tx(m->ss);
+
+	case LWSSSCS_CONNECTING:
+		break;
+
+	case LWSSSCS_QOS_ACK_REMOTE:
+		switch (m->partway) {
+		case 2:
+			lws_sul_schedule(context, 0, &m->sul, policy_set, 1);
+			m->partway = 0;
+			break;
+		}
+		break;
+
+	case LWSSSCS_DISCONNECTED:
+		if (m->partway == 1) {
+			lws_ss_policy_parse_abandon(context);
+			break;
+		}
+		m->partway = 0;
+		break;
+
+	default:
+		break;
+	}
+
+	return LWSSSSRET_OK;
+}
+
+int
+lws_ss_sys_fetch_policy(struct lws_context *context)
+{
+	lws_ss_info_t ssi;
+
+	if (context->hss_fetch_policy) /* already exists */
+		return 0;
+
+	/* We're making an outgoing secure stream ourselves */
+
+	memset(&ssi, 0, sizeof(ssi));
+	ssi.handle_offset	    = offsetof(ss_fetch_policy_t, ss);
+	ssi.opaque_user_data_offset = offsetof(ss_fetch_policy_t, opaque_data);
+	ssi.rx			    = ss_fetch_policy_rx;
+	ssi.tx			    = ss_fetch_policy_tx;
+	ssi.state		    = ss_fetch_policy_state;
+	ssi.user_alloc		    = sizeof(ss_fetch_policy_t);
+	ssi.streamtype		    = "fetch_policy";
+
+	if (lws_ss_create(context, 0, &ssi, context, &context->hss_fetch_policy,
+			  NULL, NULL)) {
+		/*
+		 * If there's no fetch_policy streamtype, it can just be we're
+		 * running on a proxied client with no policy of its own,
+		 * it's OK.
+		 */
+		lwsl_info("%s: Policy fetch ss failed (stub policy?)\n", __func__);
+
+		return 0;
+	}
+
+	lwsl_info("%s: policy fetching ongoing\n", __func__);
+
+	/* fetching it is ongoing */
+
+	return 1;
+}