/* * 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 <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]); IRDA_DEBUG(5, "%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]); IRDA_DEBUG(5, "%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_GOODSIZE, 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_pid, 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_unicast(msg, info->snd_pid); err_out: nlmsg_free(msg); dev_put(dev); return ret; } static 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 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) { int err, i; err = genl_register_family(&irda_nl_family); if (err) return err; for (i = 0; i < ARRAY_SIZE(irda_nl_ops); i++) { err = genl_register_ops(&irda_nl_family, &irda_nl_ops[i]); if (err) goto err_out; } return 0; err_out: genl_unregister_family(&irda_nl_family); return err; } void irda_nl_unregister(void) { genl_unregister_family(&irda_nl_family); }