Cleanroom libnl_2 library
By overriding the netlink cache pointer, able to pass nl80211 family id.
Scan and connecting open access point work
Added legal stuff to headers
Change-Id: I1c60452f35fdd1f80edebc03fef33067722d0543
diff --git a/libnl_2/handlers.c b/libnl_2/handlers.c
new file mode 100644
index 0000000..ec8d512
--- /dev/null
+++ b/libnl_2/handlers.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* NOTICE: This is a clean room re-implementation of libnl */
+
+#include <malloc.h>
+#include "netlink-types.h"
+#include "netlink/handlers.h"
+
+/* Allocate a new callback handle. */
+struct nl_cb *nl_cb_alloc(enum nl_cb_kind kind)
+{
+ struct nl_cb *cb;
+
+ cb = (struct nl_cb *) malloc(sizeof(struct nl_cb));
+ if (cb == NULL)
+ goto fail;
+ memset(cb, 0, sizeof(*cb));
+
+ return nl_cb_get(cb);
+fail:
+ return NULL;
+}
+
+/* Clone an existing callback handle */
+struct nl_cb *nl_cb_clone(struct nl_cb *orig)
+{
+ struct nl_cb *new_cb;
+ int new_refcnt;
+
+ new_cb = nl_cb_alloc(NL_CB_DEFAULT);
+ if (new_cb == NULL)
+ goto fail;
+
+ /* Preserve reference count and copy original */
+ new_refcnt = new_cb->cb_refcnt;
+ memcpy(new_cb, orig, sizeof(*orig));
+ new_cb->cb_refcnt = new_refcnt;
+
+ return new_cb;
+fail:
+ return NULL;
+}
+
+/* Set up a callback. */
+int nl_cb_set(struct nl_cb *cb, enum nl_cb_type type, enum nl_cb_kind kind, \
+ nl_recvmsg_msg_cb_t func, void *arg)
+{
+ cb->cb_set[type] = func;
+ cb->cb_args[type] = arg;
+ return 0;
+}
+
+
+
+/* Set up an error callback. */
+int nl_cb_err(struct nl_cb *cb, enum nl_cb_kind kind, \
+ nl_recvmsg_err_cb_t func, void *arg)
+{
+ cb->cb_err = func;
+ cb->cb_err_arg = arg;
+ return 0;
+
+}
+
+struct nl_cb *nl_cb_get(struct nl_cb *cb)
+{
+ cb->cb_refcnt++;
+ return cb;
+}
+
+void nl_cb_put(struct nl_cb *cb)
+{
+ cb->cb_refcnt--;
+ if (cb->cb_refcnt <= 0)
+ free(cb);
+
+}
+