Update Files

Kinc/Sources/kinc/libs/system/dhcpclient/dhcpclient.c

@@ -0,0 +1,156 @@
+ /*
+ * libwebsockets - small server side websockets and web server implementation
+ *
+ * Copyright (C) 2010 - 2021 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"
+#include "private-lib-system-dhcpclient.h"
+
+void
+lws_dhcpc_retry_write(struct lws_sorted_usec_list *sul)
+{
+	lws_dhcpc_req_t *r = lws_container_of(sul, lws_dhcpc_req_t, sul_write);
+
+	lwsl_debug("%s\n", __func__);
+
+	if (r && r->wsi_raw)
+		lws_callback_on_writable(r->wsi_raw);
+}
+
+static void
+lws_dhcpc_destroy(lws_dhcpc_req_t **pr)
+{
+	lws_dhcpc_req_t *r = *pr;
+
+	lws_sul_cancel(&r->sul_conn);
+	lws_sul_cancel(&r->sul_write);
+	lws_sul_cancel(&r->sul_renew);
+
+	if (r->wsi_raw)
+		lws_set_timeout(r->wsi_raw, 1, LWS_TO_KILL_ASYNC);
+
+	lws_dll2_remove(&r->list);
+
+	lws_free_set_NULL(r);
+}
+
+int
+lws_dhcpc_status(struct lws_context *context, lws_sockaddr46 *sa46)
+{
+	lws_dhcpc_req_t *r;
+
+	lws_start_foreach_dll(struct lws_dll2 *, p, context->dhcpc_owner.head) {
+		r = (lws_dhcpc_req_t *)p;
+
+		if (r->state == LDHC_BOUND) {
+			if (sa46) {
+				memcpy(sa46, &r->is.sa46[LWSDH_SA46_DNS_SRV_1],
+				       sizeof(*sa46));
+			}
+			return 1;
+		}
+
+	} lws_end_foreach_dll(p);
+
+	return 0;
+}
+
+static lws_dhcpc_req_t *
+lws_dhcpc_find(struct lws_context *context, const char *iface, int af)
+{
+	lws_dhcpc_req_t *r;
+
+	/* see if we are already looking after this af / iface combination */
+
+	lws_start_foreach_dll(struct lws_dll2 *, p, context->dhcpc_owner.head) {
+		r = (lws_dhcpc_req_t *)p;
+
+		if (!strcmp((const char *)&r[1], iface) && af == r->af)
+			return r; /* yes...  */
+
+	} lws_end_foreach_dll(p);
+
+	return NULL;
+}
+
+/*
+ * Create a persistent dhcp client entry for network interface "iface" and AF
+ * type "af"
+ */
+
+int
+lws_dhcpc_request(struct lws_context *context, const char *iface, int af,
+		  dhcpc_cb_t cb, void *opaque)
+{
+	lws_dhcpc_req_t *r = lws_dhcpc_find(context, iface, af);
+	int n;
+
+	/* see if we are already looking after this af / iface combination */
+
+	if (r)
+		return 0;
+
+	/* nope... let's create a request object as he asks */
+
+	n = (int)strlen(iface);
+	r = lws_zalloc(sizeof(*r) + (unsigned int)n + 1u, __func__);
+	if (!r)
+		return 1;
+
+	memcpy(&r[1], iface, (unsigned int)n + 1);
+	r->af = (uint8_t)af;
+	r->cb = cb;
+	r->opaque = opaque;
+	r->context = context;
+	r->state = LDHC_INIT;
+
+	lws_strncpy(r->is.ifname, iface, sizeof(r->is.ifname));
+
+	lws_dll2_add_head(&r->list, &context->dhcpc_owner); /* add him to list */
+
+	lws_dhcpc4_retry_conn(&r->sul_conn);
+
+	return 0;
+}
+
+/*
+ * Destroy every DHCP client object related to interface "iface"
+ */
+
+static int
+_remove_if(struct lws_dll2 *d, void *opaque)
+{
+	lws_dhcpc_req_t *r = lws_container_of(d, lws_dhcpc_req_t, list);
+
+	if (!opaque || !strcmp((const char *)&r[1], (const char *)opaque))
+		lws_dhcpc_destroy(&r);
+
+	return 0;
+}
+
+int
+lws_dhcpc_remove(struct lws_context *context, const char *iface)
+{
+	lws_dll2_foreach_safe(&context->dhcpc_owner, (void *)iface, _remove_if);
+
+	return 0;
+}