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/*
* 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;
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 */
},
};
static struct genl_family irda_nl_family __ro_after_init = {
.name = IRDA_NL_NAME,
.hdrsize = 0,
.version = IRDA_NL_VERSION,
.maxattr = IRDA_NL_CMD_MAX,
.module = THIS_MODULE,
.ops = irda_nl_ops,
.n_ops = ARRAY_SIZE(irda_nl_ops),
};
int __init irda_nl_register(void)
{
return genl_register_family(&irda_nl_family);
}
void irda_nl_unregister(void)
{
genl_unregister_family(&irda_nl_family);
}
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