From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 net/irda/irnetlink.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 net/irda/irnetlink.c

(limited to 'net/irda/irnetlink.c')

diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
new file mode 100644
index 000000000..e15c40e86
--- /dev/null
+++ b/net/irda/irnetlink.c
@@ -0,0 +1,158 @@
+/*
+ * IrDA netlink layer, for stack configuration.
+ *
+ * Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
+ *
+ * Partly based on the 802.11 nelink implementation
+ * (see net/wireless/nl80211.c) which is:
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/socket.h>
+#include <linux/irda.h>
+#include <linux/gfp.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/irda/irda.h>
+#include <net/irda/irlap.h>
+#include <net/genetlink.h>
+
+
+
+static struct genl_family irda_nl_family = {
+	.id = GENL_ID_GENERATE,
+	.name = IRDA_NL_NAME,
+	.hdrsize = 0,
+	.version = IRDA_NL_VERSION,
+	.maxattr = IRDA_NL_CMD_MAX,
+};
+
+static struct net_device * ifname_to_netdev(struct net *net, struct genl_info *info)
+{
+	char * ifname;
+
+	if (!info->attrs[IRDA_NL_ATTR_IFNAME])
+		return NULL;
+
+	ifname = nla_data(info->attrs[IRDA_NL_ATTR_IFNAME]);
+
+	pr_debug("%s(): Looking for %s\n", __func__, ifname);
+
+	return dev_get_by_name(net, ifname);
+}
+
+static int irda_nl_set_mode(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net_device * dev;
+	struct irlap_cb * irlap;
+	u32 mode;
+
+	if (!info->attrs[IRDA_NL_ATTR_MODE])
+		return -EINVAL;
+
+	mode = nla_get_u32(info->attrs[IRDA_NL_ATTR_MODE]);
+
+	pr_debug("%s(): Switching to mode: %d\n", __func__, mode);
+
+	dev = ifname_to_netdev(&init_net, info);
+	if (!dev)
+		return -ENODEV;
+
+	irlap = (struct irlap_cb *)dev->atalk_ptr;
+	if (!irlap) {
+		dev_put(dev);
+		return -ENODEV;
+	}
+
+	irlap->mode = mode;
+
+	dev_put(dev);
+
+	return 0;
+}
+
+static int irda_nl_get_mode(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net_device * dev;
+	struct irlap_cb * irlap;
+	struct sk_buff *msg;
+	void *hdr;
+	int ret = -ENOBUFS;
+
+	dev = ifname_to_netdev(&init_net, info);
+	if (!dev)
+		return -ENODEV;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		dev_put(dev);
+		return -ENOMEM;
+	}
+
+	irlap = (struct irlap_cb *)dev->atalk_ptr;
+	if (!irlap) {
+		ret = -ENODEV;
+		goto err_out;
+	}
+
+	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+			  &irda_nl_family, 0,  IRDA_NL_CMD_GET_MODE);
+	if (hdr == NULL) {
+		ret = -EMSGSIZE;
+		goto err_out;
+	}
+
+	if(nla_put_string(msg, IRDA_NL_ATTR_IFNAME,
+			  dev->name))
+		goto err_out;
+
+	if(nla_put_u32(msg, IRDA_NL_ATTR_MODE, irlap->mode))
+		goto err_out;
+
+	genlmsg_end(msg, hdr);
+
+	return genlmsg_reply(msg, info);
+
+ err_out:
+	nlmsg_free(msg);
+	dev_put(dev);
+
+	return ret;
+}
+
+static const struct nla_policy irda_nl_policy[IRDA_NL_ATTR_MAX + 1] = {
+	[IRDA_NL_ATTR_IFNAME] = { .type = NLA_NUL_STRING,
+				  .len = IFNAMSIZ-1 },
+	[IRDA_NL_ATTR_MODE] = { .type = NLA_U32 },
+};
+
+static const struct genl_ops irda_nl_ops[] = {
+	{
+		.cmd = IRDA_NL_CMD_SET_MODE,
+		.doit = irda_nl_set_mode,
+		.policy = irda_nl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = IRDA_NL_CMD_GET_MODE,
+		.doit = irda_nl_get_mode,
+		.policy = irda_nl_policy,
+		/* can be retrieved by unprivileged users */
+	},
+
+};
+
+int irda_nl_register(void)
+{
+	return genl_register_family_with_ops(&irda_nl_family, irda_nl_ops);
+}
+
+void irda_nl_unregister(void)
+{
+	genl_unregister_family(&irda_nl_family);
+}
-- 
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