/* * This is the new netlink-based wireless configuration interface. * * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net> */ #include <linux/if.h> #include <linux/module.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/list.h> #include <linux/if_ether.h> #include <linux/ieee80211.h> #include <linux/nl80211.h> #include <linux/rtnetlink.h> #include <linux/netlink.h> #include <linux/etherdevice.h> #include <net/genetlink.h> #include <net/cfg80211.h> #include "core.h" #include "nl80211.h" #include "reg.h" /* the netlink family */ static struct genl_family nl80211_fam = { .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */ .name = "nl80211", /* have users key off the name instead */ .hdrsize = 0, /* no private header */ .version = 1, /* no particular meaning now */ .maxattr = NL80211_ATTR_MAX, }; /* internal helper: get drv and dev */ static int get_drv_dev_by_info_ifindex(struct nlattr **attrs, struct cfg80211_registered_device **drv, struct net_device **dev) { int ifindex; if (!attrs[NL80211_ATTR_IFINDEX]) return -EINVAL; ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]); *dev = dev_get_by_index(&init_net, ifindex); if (!*dev) return -ENODEV; *drv = cfg80211_get_dev_from_ifindex(ifindex); if (IS_ERR(*drv)) { dev_put(*dev); return PTR_ERR(*drv); } return 0; } /* policy for the attributes */ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = { [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING, .len = BUS_ID_SIZE-1 }, [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED }, [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 }, [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 }, [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 }, [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 }, [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN }, [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN }, [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 }, [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 }, [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG }, [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 }, [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 }, [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY, .len = IEEE80211_MAX_DATA_LEN }, [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY, .len = IEEE80211_MAX_DATA_LEN }, [NL80211_ATTR_STA_AID] = { .type = NLA_U16 }, [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED }, [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 }, [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY, .len = NL80211_MAX_SUPP_RATES }, [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 }, [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 }, [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, .len = IEEE80211_MAX_MESH_ID_LEN }, [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 }, [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED }, [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 }, [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 }, [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 }, [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY, .len = NL80211_MAX_SUPP_RATES }, [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED }, [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY, .len = NL80211_HT_CAPABILITY_LEN }, [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 }, [NL80211_ATTR_IE] = { .type = NLA_BINARY, .len = IEEE80211_MAX_DATA_LEN }, [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED }, [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED }, }; /* message building helper */ static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq, int flags, u8 cmd) { /* since there is no private header just add the generic one */ return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd); } /* netlink command implementations */ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct cfg80211_registered_device *dev) { void *hdr; struct nlattr *nl_bands, *nl_band; struct nlattr *nl_freqs, *nl_freq; struct nlattr *nl_rates, *nl_rate; struct nlattr *nl_modes; enum ieee80211_band band; struct ieee80211_channel *chan; struct ieee80211_rate *rate; int i; u16 ifmodes = dev->wiphy.interface_modes; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx); NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)); NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS, dev->wiphy.max_scan_ssids); nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES); if (!nl_modes) goto nla_put_failure; i = 0; while (ifmodes) { if (ifmodes & 1) NLA_PUT_FLAG(msg, i); ifmodes >>= 1; i++; } nla_nest_end(msg, nl_modes); nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS); if (!nl_bands) goto nla_put_failure; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (!dev->wiphy.bands[band]) continue; nl_band = nla_nest_start(msg, band); if (!nl_band) goto nla_put_failure; /* add HT info */ if (dev->wiphy.bands[band]->ht_cap.ht_supported) { NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET, sizeof(dev->wiphy.bands[band]->ht_cap.mcs), &dev->wiphy.bands[band]->ht_cap.mcs); NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA, dev->wiphy.bands[band]->ht_cap.cap); NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR, dev->wiphy.bands[band]->ht_cap.ampdu_factor); NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY, dev->wiphy.bands[band]->ht_cap.ampdu_density); } /* add frequencies */ nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS); if (!nl_freqs) goto nla_put_failure; for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) { nl_freq = nla_nest_start(msg, i); if (!nl_freq) goto nla_put_failure; chan = &dev->wiphy.bands[band]->channels[i]; NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ, chan->center_freq); if (chan->flags & IEEE80211_CHAN_DISABLED) NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED); if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN); if (chan->flags & IEEE80211_CHAN_NO_IBSS) NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS); if (chan->flags & IEEE80211_CHAN_RADAR) NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR); NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, DBM_TO_MBM(chan->max_power)); nla_nest_end(msg, nl_freq); } nla_nest_end(msg, nl_freqs); /* add bitrates */ nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES); if (!nl_rates) goto nla_put_failure; for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) { nl_rate = nla_nest_start(msg, i); if (!nl_rate) goto nla_put_failure; rate = &dev->wiphy.bands[band]->bitrates[i]; NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE, rate->bitrate); if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) NLA_PUT_FLAG(msg, NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE); nla_nest_end(msg, nl_rate); } nla_nest_end(msg, nl_rates); nla_nest_end(msg, nl_band); } nla_nest_end(msg, nl_bands); return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb) { int idx = 0; int start = cb->args[0]; struct cfg80211_registered_device *dev; mutex_lock(&cfg80211_drv_mutex); list_for_each_entry(dev, &cfg80211_drv_list, list) { if (++idx <= start) continue; if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0) { idx--; break; } } mutex_unlock(&cfg80211_drv_mutex); cb->args[0] = idx; return skb->len; } static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info) { struct sk_buff *msg; struct cfg80211_registered_device *dev; dev = cfg80211_get_dev_from_info(info); if (IS_ERR(dev)) return PTR_ERR(dev); msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) goto out_err; if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) goto out_free; cfg80211_put_dev(dev); return genlmsg_unicast(msg, info->snd_pid); out_free: nlmsg_free(msg); out_err: cfg80211_put_dev(dev); return -ENOBUFS; } static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = { [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 }, [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 }, [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 }, [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 }, [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 }, }; static int parse_txq_params(struct nlattr *tb[], struct ieee80211_txq_params *txq_params) { if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] || !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] || !tb[NL80211_TXQ_ATTR_AIFS]) return -EINVAL; txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]); txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]); txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]); txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]); txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]); return 0; } static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev; int result = 0, rem_txq_params = 0; struct nlattr *nl_txq_params; rdev = cfg80211_get_dev_from_info(info); if (IS_ERR(rdev)) return PTR_ERR(rdev); if (info->attrs[NL80211_ATTR_WIPHY_NAME]) { result = cfg80211_dev_rename( rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); if (result) goto bad_res; } if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) { struct ieee80211_txq_params txq_params; struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1]; if (!rdev->ops->set_txq_params) { result = -EOPNOTSUPP; goto bad_res; } nla_for_each_nested(nl_txq_params, info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS], rem_txq_params) { nla_parse(tb, NL80211_TXQ_ATTR_MAX, nla_data(nl_txq_params), nla_len(nl_txq_params), txq_params_policy); result = parse_txq_params(tb, &txq_params); if (result) goto bad_res; result = rdev->ops->set_txq_params(&rdev->wiphy, &txq_params); if (result) goto bad_res; } } if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; struct ieee80211_channel *chan; struct ieee80211_sta_ht_cap *ht_cap; u32 freq, sec_freq; if (!rdev->ops->set_channel) { result = -EOPNOTSUPP; goto bad_res; } result = -EINVAL; if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { channel_type = nla_get_u32(info->attrs[ NL80211_ATTR_WIPHY_CHANNEL_TYPE]); if (channel_type != NL80211_CHAN_NO_HT && channel_type != NL80211_CHAN_HT20 && channel_type != NL80211_CHAN_HT40PLUS && channel_type != NL80211_CHAN_HT40MINUS) goto bad_res; } freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); chan = ieee80211_get_channel(&rdev->wiphy, freq); /* Primary channel not allowed */ if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) goto bad_res; if (channel_type == NL80211_CHAN_HT40MINUS) sec_freq = freq - 20; else if (channel_type == NL80211_CHAN_HT40PLUS) sec_freq = freq + 20; else sec_freq = 0; ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap; /* no HT capabilities */ if (channel_type != NL80211_CHAN_NO_HT && !ht_cap->ht_supported) goto bad_res; if (sec_freq) { struct ieee80211_channel *schan; /* no 40 MHz capabilities */ if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)) goto bad_res; schan = ieee80211_get_channel(&rdev->wiphy, sec_freq); /* Secondary channel not allowed */ if (!schan || schan->flags & IEEE80211_CHAN_DISABLED) goto bad_res; } result = rdev->ops->set_channel(&rdev->wiphy, chan, channel_type); if (result) goto bad_res; } bad_res: cfg80211_put_dev(rdev); return result; } static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct net_device *dev) { void *hdr; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name); NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype); return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb) { int wp_idx = 0; int if_idx = 0; int wp_start = cb->args[0]; int if_start = cb->args[1]; struct cfg80211_registered_device *dev; struct wireless_dev *wdev; mutex_lock(&cfg80211_drv_mutex); list_for_each_entry(dev, &cfg80211_drv_list, list) { if (wp_idx < wp_start) { wp_idx++; continue; } if_idx = 0; mutex_lock(&dev->devlist_mtx); list_for_each_entry(wdev, &dev->netdev_list, list) { if (if_idx < if_start) { if_idx++; continue; } if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, wdev->netdev) < 0) { mutex_unlock(&dev->devlist_mtx); goto out; } if_idx++; } mutex_unlock(&dev->devlist_mtx); wp_idx++; } out: mutex_unlock(&cfg80211_drv_mutex); cb->args[0] = wp_idx; cb->args[1] = if_idx; return skb->len; } static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info) { struct sk_buff *msg; struct cfg80211_registered_device *dev; struct net_device *netdev; int err; err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev); if (err) return err; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) goto out_err; if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0) goto out_free; dev_put(netdev); cfg80211_put_dev(dev); return genlmsg_unicast(msg, info->snd_pid); out_free: nlmsg_free(msg); out_err: dev_put(netdev); cfg80211_put_dev(dev); return -ENOBUFS; } static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = { [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG }, [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG }, [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG }, [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG }, [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG }, }; static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags) { struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1]; int flag; *mntrflags = 0; if (!nla) return -EINVAL; if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, nla, mntr_flags_policy)) return -EINVAL; for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++) if (flags[flag]) *mntrflags |= (1<<flag); return 0; } static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; struct vif_params params; int err, ifindex; enum nl80211_iftype type; struct net_device *dev; u32 _flags, *flags = NULL; memset(¶ms, 0, sizeof(params)); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; ifindex = dev->ifindex; type = dev->ieee80211_ptr->iftype; dev_put(dev); err = -EINVAL; if (info->attrs[NL80211_ATTR_IFTYPE]) { type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); if (type > NL80211_IFTYPE_MAX) goto unlock; } if (!drv->ops->change_virtual_intf || !(drv->wiphy.interface_modes & (1 << type))) { err = -EOPNOTSUPP; goto unlock; } if (info->attrs[NL80211_ATTR_MESH_ID]) { if (type != NL80211_IFTYPE_MESH_POINT) { err = -EINVAL; goto unlock; } params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); } if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { if (type != NL80211_IFTYPE_MONITOR) { err = -EINVAL; goto unlock; } err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], &_flags); if (!err) flags = &_flags; } rtnl_lock(); err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, type, flags, ¶ms); dev = __dev_get_by_index(&init_net, ifindex); WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type)); rtnl_unlock(); unlock: cfg80211_put_dev(drv); return err; } static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; struct vif_params params; int err; enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED; u32 flags; memset(¶ms, 0, sizeof(params)); if (!info->attrs[NL80211_ATTR_IFNAME]) return -EINVAL; if (info->attrs[NL80211_ATTR_IFTYPE]) { type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); if (type > NL80211_IFTYPE_MAX) return -EINVAL; } drv = cfg80211_get_dev_from_info(info); if (IS_ERR(drv)) return PTR_ERR(drv); if (!drv->ops->add_virtual_intf || !(drv->wiphy.interface_modes & (1 << type))) { err = -EOPNOTSUPP; goto unlock; } if (type == NL80211_IFTYPE_MESH_POINT && info->attrs[NL80211_ATTR_MESH_ID]) { params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); } rtnl_lock(); err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, &flags); err = drv->ops->add_virtual_intf(&drv->wiphy, nla_data(info->attrs[NL80211_ATTR_IFNAME]), type, err ? NULL : &flags, ¶ms); rtnl_unlock(); unlock: cfg80211_put_dev(drv); return err; } static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int ifindex, err; struct net_device *dev; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; ifindex = dev->ifindex; dev_put(dev); if (!drv->ops->del_virtual_intf) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex); rtnl_unlock(); out: cfg80211_put_dev(drv); return err; } struct get_key_cookie { struct sk_buff *msg; int error; }; static void get_key_callback(void *c, struct key_params *params) { struct get_key_cookie *cookie = c; if (params->key) NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA, params->key_len, params->key); if (params->seq) NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ, params->seq_len, params->seq); if (params->cipher) NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER, params->cipher); return; nla_put_failure: cookie->error = 1; } static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 key_idx = 0; u8 *mac_addr = NULL; struct get_key_cookie cookie = { .error = 0, }; void *hdr; struct sk_buff *msg; if (info->attrs[NL80211_ATTR_KEY_IDX]) key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); if (key_idx > 5) return -EINVAL; if (info->attrs[NL80211_ATTR_MAC]) mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->get_key) { err = -EOPNOTSUPP; goto out; } msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) { err = -ENOMEM; goto out; } hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, NL80211_CMD_NEW_KEY); if (IS_ERR(hdr)) { err = PTR_ERR(hdr); goto out; } cookie.msg = msg; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx); if (mac_addr) NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); rtnl_lock(); err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr, &cookie, get_key_callback); rtnl_unlock(); if (err) goto out; if (cookie.error) goto nla_put_failure; genlmsg_end(msg, hdr); err = genlmsg_unicast(msg, info->snd_pid); goto out; nla_put_failure: err = -ENOBUFS; nlmsg_free(msg); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 key_idx; int (*func)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index); if (!info->attrs[NL80211_ATTR_KEY_IDX]) return -EINVAL; key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) { if (key_idx < 4 || key_idx > 5) return -EINVAL; } else if (key_idx > 3) return -EINVAL; /* currently only support setting default key */ if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] && !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) return -EINVAL; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (info->attrs[NL80211_ATTR_KEY_DEFAULT]) func = drv->ops->set_default_key; else func = drv->ops->set_default_mgmt_key; if (!func) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = func(&drv->wiphy, dev, key_idx); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct key_params params; u8 key_idx = 0; u8 *mac_addr = NULL; memset(¶ms, 0, sizeof(params)); if (!info->attrs[NL80211_ATTR_KEY_CIPHER]) return -EINVAL; if (info->attrs[NL80211_ATTR_KEY_DATA]) { params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]); params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]); } if (info->attrs[NL80211_ATTR_KEY_IDX]) key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]); if (info->attrs[NL80211_ATTR_MAC]) mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); if (key_idx > 5) return -EINVAL; /* * Disallow pairwise keys with non-zero index unless it's WEP * (because current deployments use pairwise WEP keys with * non-zero indizes but 802.11i clearly specifies to use zero) */ if (mac_addr && key_idx && params.cipher != WLAN_CIPHER_SUITE_WEP40 && params.cipher != WLAN_CIPHER_SUITE_WEP104) return -EINVAL; /* TODO: add definitions for the lengths to linux/ieee80211.h */ switch (params.cipher) { case WLAN_CIPHER_SUITE_WEP40: if (params.key_len != 5) return -EINVAL; break; case WLAN_CIPHER_SUITE_TKIP: if (params.key_len != 32) return -EINVAL; break; case WLAN_CIPHER_SUITE_CCMP: if (params.key_len != 16) return -EINVAL; break; case WLAN_CIPHER_SUITE_WEP104: if (params.key_len != 13) return -EINVAL; break; case WLAN_CIPHER_SUITE_AES_CMAC: if (params.key_len != 16) return -EINVAL; break; default: return -EINVAL; } err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->add_key) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, ¶ms); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 key_idx = 0; u8 *mac_addr = NULL; if (info->attrs[NL80211_ATTR_KEY_IDX]) key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); if (key_idx > 5) return -EINVAL; if (info->attrs[NL80211_ATTR_MAC]) mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->del_key) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info) { int (*call)(struct wiphy *wiphy, struct net_device *dev, struct beacon_parameters *info); struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct beacon_parameters params; int haveinfo = 0; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; switch (info->genlhdr->cmd) { case NL80211_CMD_NEW_BEACON: /* these are required for NEW_BEACON */ if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] || !info->attrs[NL80211_ATTR_DTIM_PERIOD] || !info->attrs[NL80211_ATTR_BEACON_HEAD]) { err = -EINVAL; goto out; } call = drv->ops->add_beacon; break; case NL80211_CMD_SET_BEACON: call = drv->ops->set_beacon; break; default: WARN_ON(1); err = -EOPNOTSUPP; goto out; } if (!call) { err = -EOPNOTSUPP; goto out; } memset(¶ms, 0, sizeof(params)); if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) { params.interval = nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); haveinfo = 1; } if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) { params.dtim_period = nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]); haveinfo = 1; } if (info->attrs[NL80211_ATTR_BEACON_HEAD]) { params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]); params.head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]); haveinfo = 1; } if (info->attrs[NL80211_ATTR_BEACON_TAIL]) { params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]); params.tail_len = nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]); haveinfo = 1; } if (!haveinfo) { err = -EINVAL; goto out; } rtnl_lock(); err = call(&drv->wiphy, dev, ¶ms); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->del_beacon) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->del_beacon(&drv->wiphy, dev); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = { [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG }, [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG }, [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG }, }; static int parse_station_flags(struct nlattr *nla, u32 *staflags) { struct nlattr *flags[NL80211_STA_FLAG_MAX + 1]; int flag; *staflags = 0; if (!nla) return 0; if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, nla, sta_flags_policy)) return -EINVAL; *staflags = STATION_FLAG_CHANGED; for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) if (flags[flag]) *staflags |= (1<<flag); return 0; } static u16 nl80211_calculate_bitrate(struct rate_info *rate) { int modulation, streams, bitrate; if (!(rate->flags & RATE_INFO_FLAGS_MCS)) return rate->legacy; /* the formula below does only work for MCS values smaller than 32 */ if (rate->mcs >= 32) return 0; modulation = rate->mcs & 7; streams = (rate->mcs >> 3) + 1; bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? 13500000 : 6500000; if (modulation < 4) bitrate *= (modulation + 1); else if (modulation == 4) bitrate *= (modulation + 2); else bitrate *= (modulation + 3); bitrate *= streams; if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) bitrate = (bitrate / 9) * 10; /* do NOT round down here */ return (bitrate + 50000) / 100000; } static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct net_device *dev, u8 *mac_addr, struct station_info *sinfo) { void *hdr; struct nlattr *sinfoattr, *txrate; u16 bitrate; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO); if (!sinfoattr) goto nla_put_failure; if (sinfo->filled & STATION_INFO_INACTIVE_TIME) NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME, sinfo->inactive_time); if (sinfo->filled & STATION_INFO_RX_BYTES) NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES, sinfo->rx_bytes); if (sinfo->filled & STATION_INFO_TX_BYTES) NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES, sinfo->tx_bytes); if (sinfo->filled & STATION_INFO_LLID) NLA_PUT_U16(msg, NL80211_STA_INFO_LLID, sinfo->llid); if (sinfo->filled & STATION_INFO_PLID) NLA_PUT_U16(msg, NL80211_STA_INFO_PLID, sinfo->plid); if (sinfo->filled & STATION_INFO_PLINK_STATE) NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE, sinfo->plink_state); if (sinfo->filled & STATION_INFO_SIGNAL) NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL, sinfo->signal); if (sinfo->filled & STATION_INFO_TX_BITRATE) { txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE); if (!txrate) goto nla_put_failure; /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */ bitrate = nl80211_calculate_bitrate(&sinfo->txrate); if (bitrate > 0) NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate); if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS) NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, sinfo->txrate.mcs); if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH); if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI) NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI); nla_nest_end(msg, txrate); } if (sinfo->filled & STATION_INFO_RX_PACKETS) NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS, sinfo->rx_packets); if (sinfo->filled & STATION_INFO_TX_PACKETS) NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS, sinfo->tx_packets); nla_nest_end(msg, sinfoattr); return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } static int nl80211_dump_station(struct sk_buff *skb, struct netlink_callback *cb) { struct station_info sinfo; struct cfg80211_registered_device *dev; struct net_device *netdev; u8 mac_addr[ETH_ALEN]; int ifidx = cb->args[0]; int sta_idx = cb->args[1]; int err; if (!ifidx) { err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, nl80211_fam.attrbuf, nl80211_fam.maxattr, nl80211_policy); if (err) return err; if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]) return -EINVAL; ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]); if (!ifidx) return -EINVAL; } netdev = dev_get_by_index(&init_net, ifidx); if (!netdev) return -ENODEV; dev = cfg80211_get_dev_from_ifindex(ifidx); if (IS_ERR(dev)) { err = PTR_ERR(dev); goto out_put_netdev; } if (!dev->ops->dump_station) { err = -ENOSYS; goto out_err; } rtnl_lock(); while (1) { err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx, mac_addr, &sinfo); if (err == -ENOENT) break; if (err) goto out_err_rtnl; if (nl80211_send_station(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, netdev, mac_addr, &sinfo) < 0) goto out; sta_idx++; } out: cb->args[1] = sta_idx; err = skb->len; out_err_rtnl: rtnl_unlock(); out_err: cfg80211_put_dev(dev); out_put_netdev: dev_put(netdev); return err; } static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct station_info sinfo; struct sk_buff *msg; u8 *mac_addr = NULL; memset(&sinfo, 0, sizeof(sinfo)); if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->get_station) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo); rtnl_unlock(); if (err) goto out; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) goto out; if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0, dev, mac_addr, &sinfo) < 0) goto out_free; err = genlmsg_unicast(msg, info->snd_pid); goto out; out_free: nlmsg_free(msg); out: cfg80211_put_dev(drv); dev_put(dev); return err; } /* * Get vlan interface making sure it is on the right wiphy. */ static int get_vlan(struct nlattr *vlanattr, struct cfg80211_registered_device *rdev, struct net_device **vlan) { *vlan = NULL; if (vlanattr) { *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr)); if (!*vlan) return -ENODEV; if (!(*vlan)->ieee80211_ptr) return -EINVAL; if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy) return -EINVAL; } return 0; } static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct station_parameters params; u8 *mac_addr = NULL; memset(¶ms, 0, sizeof(params)); params.listen_interval = -1; if (info->attrs[NL80211_ATTR_STA_AID]) return -EINVAL; if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) { params.supported_rates = nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); params.supported_rates_len = nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); } if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) params.ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS], ¶ms.station_flags)) return -EINVAL; if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) params.plink_action = nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); if (err) goto out; if (!drv->ops->change_station) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, ¶ms); rtnl_unlock(); out: if (params.vlan) dev_put(params.vlan); cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct station_parameters params; u8 *mac_addr = NULL; memset(¶ms, 0, sizeof(params)); if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; if (!info->attrs[NL80211_ATTR_STA_AID]) return -EINVAL; if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) return -EINVAL; if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) return -EINVAL; mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); params.supported_rates = nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); params.supported_rates_len = nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) params.ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS], ¶ms.station_flags)) return -EINVAL; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); if (err) goto out; if (!drv->ops->add_station) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, ¶ms); rtnl_unlock(); out: if (params.vlan) dev_put(params.vlan); cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 *mac_addr = NULL; if (info->attrs[NL80211_ATTR_MAC]) mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->del_station) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->del_station(&drv->wiphy, dev, mac_addr); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct net_device *dev, u8 *dst, u8 *next_hop, struct mpath_info *pinfo) { void *hdr; struct nlattr *pinfoattr; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst); NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop); pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO); if (!pinfoattr) goto nla_put_failure; if (pinfo->filled & MPATH_INFO_FRAME_QLEN) NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN, pinfo->frame_qlen); if (pinfo->filled & MPATH_INFO_DSN) NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN, pinfo->dsn); if (pinfo->filled & MPATH_INFO_METRIC) NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC, pinfo->metric); if (pinfo->filled & MPATH_INFO_EXPTIME) NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME, pinfo->exptime); if (pinfo->filled & MPATH_INFO_FLAGS) NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS, pinfo->flags); if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT, pinfo->discovery_timeout); if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES, pinfo->discovery_retries); nla_nest_end(msg, pinfoattr); return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } static int nl80211_dump_mpath(struct sk_buff *skb, struct netlink_callback *cb) { struct mpath_info pinfo; struct cfg80211_registered_device *dev; struct net_device *netdev; u8 dst[ETH_ALEN]; u8 next_hop[ETH_ALEN]; int ifidx = cb->args[0]; int path_idx = cb->args[1]; int err; if (!ifidx) { err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, nl80211_fam.attrbuf, nl80211_fam.maxattr, nl80211_policy); if (err) return err; if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]) return -EINVAL; ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]); if (!ifidx) return -EINVAL; } netdev = dev_get_by_index(&init_net, ifidx); if (!netdev) return -ENODEV; dev = cfg80211_get_dev_from_ifindex(ifidx); if (IS_ERR(dev)) { err = PTR_ERR(dev); goto out_put_netdev; } if (!dev->ops->dump_mpath) { err = -ENOSYS; goto out_err; } rtnl_lock(); while (1) { err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx, dst, next_hop, &pinfo); if (err == -ENOENT) break; if (err) goto out_err_rtnl; if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, netdev, dst, next_hop, &pinfo) < 0) goto out; path_idx++; } out: cb->args[1] = path_idx; err = skb->len; out_err_rtnl: rtnl_unlock(); out_err: cfg80211_put_dev(dev); out_put_netdev: dev_put(netdev); return err; } static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct mpath_info pinfo; struct sk_buff *msg; u8 *dst = NULL; u8 next_hop[ETH_ALEN]; memset(&pinfo, 0, sizeof(pinfo)); if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; dst = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->get_mpath) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo); rtnl_unlock(); if (err) goto out; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) goto out; if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0, dev, dst, next_hop, &pinfo) < 0) goto out_free; err = genlmsg_unicast(msg, info->snd_pid); goto out; out_free: nlmsg_free(msg); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 *dst = NULL; u8 *next_hop = NULL; if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) return -EINVAL; dst = nla_data(info->attrs[NL80211_ATTR_MAC]); next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->change_mpath) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 *dst = NULL; u8 *next_hop = NULL; if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) return -EINVAL; dst = nla_data(info->attrs[NL80211_ATTR_MAC]); next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->add_mpath) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; u8 *dst = NULL; if (info->attrs[NL80211_ATTR_MAC]) dst = nla_data(info->attrs[NL80211_ATTR_MAC]); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->del_mpath) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->del_mpath(&drv->wiphy, dev, dst); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct bss_parameters params; memset(¶ms, 0, sizeof(params)); /* default to not changing parameters */ params.use_cts_prot = -1; params.use_short_preamble = -1; params.use_short_slot_time = -1; if (info->attrs[NL80211_ATTR_BSS_CTS_PROT]) params.use_cts_prot = nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]); if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]) params.use_short_preamble = nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]); if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]) params.use_short_slot_time = nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]); if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) { params.basic_rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); params.basic_rates_len = nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); } err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (!drv->ops->change_bss) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->change_bss(&drv->wiphy, dev, ¶ms); rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = { [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 }, [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 }, [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 }, [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 }, [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 }, [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 }, }; static int parse_reg_rule(struct nlattr *tb[], struct ieee80211_reg_rule *reg_rule) { struct ieee80211_freq_range *freq_range = ®_rule->freq_range; struct ieee80211_power_rule *power_rule = ®_rule->power_rule; if (!tb[NL80211_ATTR_REG_RULE_FLAGS]) return -EINVAL; if (!tb[NL80211_ATTR_FREQ_RANGE_START]) return -EINVAL; if (!tb[NL80211_ATTR_FREQ_RANGE_END]) return -EINVAL; if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) return -EINVAL; if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]) return -EINVAL; reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]); freq_range->start_freq_khz = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]); freq_range->end_freq_khz = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]); freq_range->max_bandwidth_khz = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); power_rule->max_eirp = nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]); if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]) power_rule->max_antenna_gain = nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]); return 0; } static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) { int r; char *data = NULL; if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) return -EINVAL; data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); #ifdef CONFIG_WIRELESS_OLD_REGULATORY /* We ignore world regdom requests with the old regdom setup */ if (is_world_regdom(data)) return -EINVAL; #endif mutex_lock(&cfg80211_drv_mutex); r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, 0, ENVIRON_ANY); mutex_unlock(&cfg80211_drv_mutex); /* This means the regulatory domain was already set, however * we don't want to confuse userspace with a "successful error" * message so lets just treat it as a success */ if (r == -EALREADY) r = 0; return r; } static int nl80211_get_mesh_params(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; struct mesh_config cur_params; int err; struct net_device *dev; void *hdr; struct nlattr *pinfoattr; struct sk_buff *msg; /* Look up our device */ err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; /* Get the mesh params */ rtnl_lock(); err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params); rtnl_unlock(); if (err) goto out; /* Draw up a netlink message to send back */ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) { err = -ENOBUFS; goto out; } hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, NL80211_CMD_GET_MESH_PARAMS); if (!hdr) goto nla_put_failure; pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS); if (!pinfoattr) goto nla_put_failure; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT, cur_params.dot11MeshRetryTimeout); NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT, cur_params.dot11MeshConfirmTimeout); NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT, cur_params.dot11MeshHoldingTimeout); NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS, cur_params.dot11MeshMaxPeerLinks); NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES, cur_params.dot11MeshMaxRetries); NLA_PUT_U8(msg, NL80211_MESHCONF_TTL, cur_params.dot11MeshTTL); NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS, cur_params.auto_open_plinks); NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, cur_params.dot11MeshHWMPmaxPREQretries); NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME, cur_params.path_refresh_time); NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, cur_params.min_discovery_timeout); NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, cur_params.dot11MeshHWMPactivePathTimeout); NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, cur_params.dot11MeshHWMPpreqMinInterval); NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, cur_params.dot11MeshHWMPnetDiameterTraversalTime); nla_nest_end(msg, pinfoattr); genlmsg_end(msg, hdr); err = genlmsg_unicast(msg, info->snd_pid); goto out; nla_put_failure: genlmsg_cancel(msg, hdr); err = -EMSGSIZE; out: /* Cleanup */ cfg80211_put_dev(drv); dev_put(dev); return err; } #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \ do {\ if (table[attr_num]) {\ cfg.param = nla_fn(table[attr_num]); \ mask |= (1 << (attr_num - 1)); \ } \ } while (0);\ static struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = { [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 }, [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 }, [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 }, [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 }, [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 }, [NL80211_MESHCONF_TTL] = { .type = NLA_U8 }, [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 }, [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 }, [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 }, [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 }, [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 }, [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 }, [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 }, }; static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info) { int err; u32 mask; struct cfg80211_registered_device *drv; struct net_device *dev; struct mesh_config cfg; struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1]; struct nlattr *parent_attr; parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS]; if (!parent_attr) return -EINVAL; if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX, parent_attr, nl80211_meshconf_params_policy)) return -EINVAL; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; /* This makes sure that there aren't more than 32 mesh config * parameters (otherwise our bitfield scheme would not work.) */ BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32); /* Fill in the params struct */ mask = 0; FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, mask, NL80211_MESHCONF_TTL, nla_get_u8); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, nla_get_u8); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, nla_get_u32); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval, mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, nla_get_u16); FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPnetDiameterTraversalTime, mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, nla_get_u16); /* Apply changes */ rtnl_lock(); err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask); rtnl_unlock(); /* cleanup */ cfg80211_put_dev(drv); dev_put(dev); return err; } #undef FILL_IN_MESH_PARAM_IF_SET static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info) { struct sk_buff *msg; void *hdr = NULL; struct nlattr *nl_reg_rules; unsigned int i; int err = -EINVAL; mutex_lock(&cfg80211_drv_mutex); if (!cfg80211_regdomain) goto out; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) { err = -ENOBUFS; goto out; } hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, NL80211_CMD_GET_REG); if (!hdr) goto nla_put_failure; NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, cfg80211_regdomain->alpha2); nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES); if (!nl_reg_rules) goto nla_put_failure; for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { struct nlattr *nl_reg_rule; const struct ieee80211_reg_rule *reg_rule; const struct ieee80211_freq_range *freq_range; const struct ieee80211_power_rule *power_rule; reg_rule = &cfg80211_regdomain->reg_rules[i]; freq_range = ®_rule->freq_range; power_rule = ®_rule->power_rule; nl_reg_rule = nla_nest_start(msg, i); if (!nl_reg_rule) goto nla_put_failure; NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS, reg_rule->flags); NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START, freq_range->start_freq_khz); NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END, freq_range->end_freq_khz); NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW, freq_range->max_bandwidth_khz); NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN, power_rule->max_antenna_gain); NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP, power_rule->max_eirp); nla_nest_end(msg, nl_reg_rule); } nla_nest_end(msg, nl_reg_rules); genlmsg_end(msg, hdr); err = genlmsg_unicast(msg, info->snd_pid); goto out; nla_put_failure: genlmsg_cancel(msg, hdr); err = -EMSGSIZE; out: mutex_unlock(&cfg80211_drv_mutex); return err; } static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info) { struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1]; struct nlattr *nl_reg_rule; char *alpha2 = NULL; int rem_reg_rules = 0, r = 0; u32 num_rules = 0, rule_idx = 0, size_of_regd; struct ieee80211_regdomain *rd = NULL; if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) return -EINVAL; if (!info->attrs[NL80211_ATTR_REG_RULES]) return -EINVAL; alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], rem_reg_rules) { num_rules++; if (num_rules > NL80211_MAX_SUPP_REG_RULES) goto bad_reg; } if (!reg_is_valid_request(alpha2)) return -EINVAL; size_of_regd = sizeof(struct ieee80211_regdomain) + (num_rules * sizeof(struct ieee80211_reg_rule)); rd = kzalloc(size_of_regd, GFP_KERNEL); if (!rd) return -ENOMEM; rd->n_reg_rules = num_rules; rd->alpha2[0] = alpha2[0]; rd->alpha2[1] = alpha2[1]; nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], rem_reg_rules) { nla_parse(tb, NL80211_REG_RULE_ATTR_MAX, nla_data(nl_reg_rule), nla_len(nl_reg_rule), reg_rule_policy); r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]); if (r) goto bad_reg; rule_idx++; if (rule_idx > NL80211_MAX_SUPP_REG_RULES) goto bad_reg; } BUG_ON(rule_idx != num_rules); mutex_lock(&cfg80211_drv_mutex); r = set_regdom(rd); mutex_unlock(&cfg80211_drv_mutex); return r; bad_reg: kfree(rd); return -EINVAL; } static int nl80211_set_mgmt_extra_ie(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; int err; struct net_device *dev; struct mgmt_extra_ie_params params; memset(¶ms, 0, sizeof(params)); if (!info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) return -EINVAL; params.subtype = nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]); if (params.subtype > 15) return -EINVAL; /* FC Subtype field is 4 bits (0..15) */ if (info->attrs[NL80211_ATTR_IE]) { params.ies = nla_data(info->attrs[NL80211_ATTR_IE]); params.ies_len = nla_len(info->attrs[NL80211_ATTR_IE]); } err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; if (drv->ops->set_mgmt_extra_ie) { rtnl_lock(); err = drv->ops->set_mgmt_extra_ie(&drv->wiphy, dev, ¶ms); rtnl_unlock(); } else err = -EOPNOTSUPP; cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; struct net_device *dev; struct cfg80211_scan_request *request; struct cfg80211_ssid *ssid; struct ieee80211_channel *channel; struct nlattr *attr; struct wiphy *wiphy; int err, tmp, n_ssids = 0, n_channels = 0, i; enum ieee80211_band band; size_t ie_len; err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); if (err) return err; wiphy = &drv->wiphy; if (!drv->ops->scan) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); if (drv->scan_req) { err = -EBUSY; goto out_unlock; } if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) n_channels++; if (!n_channels) { err = -EINVAL; goto out_unlock; } } else { for (band = 0; band < IEEE80211_NUM_BANDS; band++) if (wiphy->bands[band]) n_channels += wiphy->bands[band]->n_channels; } if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) n_ssids++; if (n_ssids > wiphy->max_scan_ssids) { err = -EINVAL; goto out_unlock; } if (info->attrs[NL80211_ATTR_IE]) ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); else ie_len = 0; request = kzalloc(sizeof(*request) + sizeof(*ssid) * n_ssids + sizeof(channel) * n_channels + ie_len, GFP_KERNEL); if (!request) { err = -ENOMEM; goto out_unlock; } request->channels = (void *)((char *)request + sizeof(*request)); request->n_channels = n_channels; if (n_ssids) request->ssids = (void *)(request->channels + n_channels); request->n_ssids = n_ssids; if (ie_len) { if (request->ssids) request->ie = (void *)(request->ssids + n_ssids); else request->ie = (void *)(request->channels + n_channels); } if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { /* user specified, bail out if channel not found */ request->n_channels = n_channels; i = 0; nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) { request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr)); if (!request->channels[i]) { err = -EINVAL; goto out_free; } i++; } } else { /* all channels */ i = 0; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { int j; if (!wiphy->bands[band]) continue; for (j = 0; j < wiphy->bands[band]->n_channels; j++) { request->channels[i] = &wiphy->bands[band]->channels[j]; i++; } } } i = 0; if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) { err = -EINVAL; goto out_free; } memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr)); request->ssids[i].ssid_len = nla_len(attr); i++; } } if (info->attrs[NL80211_ATTR_IE]) { request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); memcpy(request->ie, nla_data(info->attrs[NL80211_ATTR_IE]), request->ie_len); } request->ifidx = dev->ifindex; request->wiphy = &drv->wiphy; drv->scan_req = request; err = drv->ops->scan(&drv->wiphy, dev, request); out_free: if (err) { drv->scan_req = NULL; kfree(request); } out_unlock: rtnl_unlock(); out: cfg80211_put_dev(drv); dev_put(dev); return err; } static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_bss *res) { void *hdr; struct nlattr *bss; hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_SCAN_RESULTS); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION, rdev->bss_generation); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); bss = nla_nest_start(msg, NL80211_ATTR_BSS); if (!bss) goto nla_put_failure; if (!is_zero_ether_addr(res->bssid)) NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid); if (res->information_elements && res->len_information_elements) NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS, res->len_information_elements, res->information_elements); if (res->tsf) NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf); if (res->beacon_interval) NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval); NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); switch (res->signal_type) { case CFG80211_SIGNAL_TYPE_MBM: NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal); break; case CFG80211_SIGNAL_TYPE_UNSPEC: NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal); break; default: break; } nla_nest_end(msg, bss); return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb) { struct cfg80211_registered_device *dev; struct net_device *netdev; struct cfg80211_internal_bss *scan; int ifidx = cb->args[0]; int start = cb->args[1], idx = 0; int err; if (!ifidx) { err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, nl80211_fam.attrbuf, nl80211_fam.maxattr, nl80211_policy); if (err) return err; if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]) return -EINVAL; ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]); if (!ifidx) return -EINVAL; cb->args[0] = ifidx; } netdev = dev_get_by_index(&init_net, ifidx); if (!netdev) return -ENODEV; dev = cfg80211_get_dev_from_ifindex(ifidx); if (IS_ERR(dev)) { err = PTR_ERR(dev); goto out_put_netdev; } spin_lock_bh(&dev->bss_lock); cfg80211_bss_expire(dev); list_for_each_entry(scan, &dev->bss_list, list) { if (++idx <= start) continue; if (nl80211_send_bss(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, dev, netdev, &scan->pub) < 0) { idx--; goto out; } } out: spin_unlock_bh(&dev->bss_lock); cb->args[1] = idx; err = skb->len; cfg80211_put_dev(dev); out_put_netdev: dev_put(netdev); return err; } static struct genl_ops nl80211_ops[] = { { .cmd = NL80211_CMD_GET_WIPHY, .doit = nl80211_get_wiphy, .dumpit = nl80211_dump_wiphy, .policy = nl80211_policy, /* can be retrieved by unprivileged users */ }, { .cmd = NL80211_CMD_SET_WIPHY, .doit = nl80211_set_wiphy, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_INTERFACE, .doit = nl80211_get_interface, .dumpit = nl80211_dump_interface, .policy = nl80211_policy, /* can be retrieved by unprivileged users */ }, { .cmd = NL80211_CMD_SET_INTERFACE, .doit = nl80211_set_interface, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_NEW_INTERFACE, .doit = nl80211_new_interface, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_DEL_INTERFACE, .doit = nl80211_del_interface, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_KEY, .doit = nl80211_get_key, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_KEY, .doit = nl80211_set_key, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_NEW_KEY, .doit = nl80211_new_key, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_DEL_KEY, .doit = nl80211_del_key, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_BEACON, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, .doit = nl80211_addset_beacon, }, { .cmd = NL80211_CMD_NEW_BEACON, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, .doit = nl80211_addset_beacon, }, { .cmd = NL80211_CMD_DEL_BEACON, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, .doit = nl80211_del_beacon, }, { .cmd = NL80211_CMD_GET_STATION, .doit = nl80211_get_station, .dumpit = nl80211_dump_station, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_STATION, .doit = nl80211_set_station, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_NEW_STATION, .doit = nl80211_new_station, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_DEL_STATION, .doit = nl80211_del_station, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_MPATH, .doit = nl80211_get_mpath, .dumpit = nl80211_dump_mpath, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_MPATH, .doit = nl80211_set_mpath, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_NEW_MPATH, .doit = nl80211_new_mpath, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_DEL_MPATH, .doit = nl80211_del_mpath, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_BSS, .doit = nl80211_set_bss, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_REG, .doit = nl80211_get_reg, .policy = nl80211_policy, /* can be retrieved by unprivileged users */ }, { .cmd = NL80211_CMD_SET_REG, .doit = nl80211_set_reg, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_REQ_SET_REG, .doit = nl80211_req_set_reg, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_MESH_PARAMS, .doit = nl80211_get_mesh_params, .policy = nl80211_policy, /* can be retrieved by unprivileged users */ }, { .cmd = NL80211_CMD_SET_MESH_PARAMS, .doit = nl80211_set_mesh_params, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_SET_MGMT_EXTRA_IE, .doit = nl80211_set_mgmt_extra_ie, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_TRIGGER_SCAN, .doit = nl80211_trigger_scan, .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, { .cmd = NL80211_CMD_GET_SCAN, .policy = nl80211_policy, .dumpit = nl80211_dump_scan, }, }; /* multicast groups */ static struct genl_multicast_group nl80211_config_mcgrp = { .name = "config", }; static struct genl_multicast_group nl80211_scan_mcgrp = { .name = "scan", }; /* notification functions */ void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev) { struct sk_buff *msg; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) return; if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) { nlmsg_free(msg); return; } genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL); } static int nl80211_send_scan_donemsg(struct sk_buff *msg, struct cfg80211_registered_device *rdev, struct net_device *netdev, u32 pid, u32 seq, int flags, u32 cmd) { void *hdr; hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); if (!hdr) return -1; NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->idx); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); /* XXX: we should probably bounce back the request? */ return genlmsg_end(msg, hdr); nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, struct net_device *netdev) { struct sk_buff *msg; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) return; if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0, NL80211_CMD_NEW_SCAN_RESULTS) < 0) { nlmsg_free(msg); return; } genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL); } void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, struct net_device *netdev) { struct sk_buff *msg; msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) return; if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0, NL80211_CMD_SCAN_ABORTED) < 0) { nlmsg_free(msg); return; } genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL); } /* initialisation/exit functions */ int nl80211_init(void) { int err, i; err = genl_register_family(&nl80211_fam); if (err) return err; for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) { err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]); if (err) goto err_out; } err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp); if (err) goto err_out; err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp); if (err) goto err_out; return 0; err_out: genl_unregister_family(&nl80211_fam); return err; } void nl80211_exit(void) { genl_unregister_family(&nl80211_fam); }