/* * 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 <net/genetlink.h> #include <net/cfg80211.h> #include "core.h" #include "nl80211.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 genl_info *info, struct cfg80211_registered_device **drv, struct net_device **dev) { int ifindex; if (!info->attrs[NL80211_ATTR_IFINDEX]) return -EINVAL; ifindex = nla_get_u32(info->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_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] = { .type = NLA_NESTED }, [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, .len = IEEE80211_MAX_MESH_ID_LEN }, [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, }; /* 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; enum ieee80211_band band; struct ieee80211_channel *chan; struct ieee80211_rate *rate; int i; 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)); 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 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_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) 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 int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev; int result; if (!info->attrs[NL80211_ATTR_WIPHY_NAME]) return -EINVAL; rdev = cfg80211_get_dev_from_info(info); if (IS_ERR(rdev)) return PTR_ERR(rdev); result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); 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); /* TODO: interface type */ 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) continue; if_idx = 0; mutex_lock(&dev->devlist_mtx); list_for_each_entry(wdev, &dev->netdev_list, list) { if (++if_idx < if_start) continue; if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, wdev->netdev) < 0) break; } mutex_unlock(&dev->devlist_mtx); } 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, &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; memset(¶ms, 0, sizeof(params)); if (info->attrs[NL80211_ATTR_IFTYPE]) { type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); if (type > NL80211_IFTYPE_MAX) return -EINVAL; } else return -EINVAL; err = get_drv_dev_by_info_ifindex(info, &drv, &dev); if (err) return err; ifindex = dev->ifindex; dev_put(dev); if (!drv->ops->change_virtual_intf) { 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->change_virtual_intf(&drv->wiphy, ifindex, type, err ? NULL : &flags, ¶ms); 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) { 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, &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 > 3) 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, &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; if (!info->attrs[NL80211_ATTR_KEY_IDX]) return -EINVAL; key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); if (key_idx > 3) return -EINVAL; /* currently only support setting default key */ if (!info->attrs[NL80211_ATTR_KEY_DEFAULT]) return -EINVAL; err = get_drv_dev_by_info_ifindex(info, &drv, &dev); if (err) return err; if (!drv->ops->set_default_key) { err = -EOPNOTSUPP; goto out; } rtnl_lock(); err = drv->ops->set_default_key(&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 > 3) 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; default: return -EINVAL; } err = get_drv_dev_by_info_ifindex(info, &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 > 3) 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, &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, &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, &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 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; 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); 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) { int wp_idx = 0; int if_idx = 0; int sta_idx = cb->args[2]; int wp_start = cb->args[0]; int if_start = cb->args[1]; struct station_info sinfo; struct cfg80211_registered_device *dev; struct wireless_dev *wdev; u8 mac_addr[ETH_ALEN]; int err; int exit = 0; /* TODO: filter by device */ mutex_lock(&cfg80211_drv_mutex); list_for_each_entry(dev, &cfg80211_drv_list, list) { if (exit) break; if (++wp_idx < wp_start) continue; if_idx = 0; mutex_lock(&dev->devlist_mtx); list_for_each_entry(wdev, &dev->netdev_list, list) { if (exit) break; if (++if_idx < if_start) continue; if (!dev->ops->dump_station) continue; for (;; ++sta_idx) { rtnl_lock(); err = dev->ops->dump_station(&dev->wiphy, wdev->netdev, sta_idx, mac_addr, &sinfo); rtnl_unlock(); if (err) { sta_idx = 0; break; } if (nl80211_send_station(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, wdev->netdev, mac_addr, &sinfo) < 0) { exit = 1; break; } } } mutex_unlock(&dev->devlist_mtx); } mutex_unlock(&cfg80211_drv_mutex); cb->args[0] = wp_idx; cb->args[1] = if_idx; cb->args[2] = sta_idx; return skb->len; } 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, &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 (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, &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 (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS], ¶ms.station_flags)) return -EINVAL; err = get_drv_dev_by_info_ifindex(info, &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, &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) { int wp_idx = 0; int if_idx = 0; int sta_idx = cb->args[2]; int wp_start = cb->args[0]; int if_start = cb->args[1]; struct mpath_info pinfo; struct cfg80211_registered_device *dev; struct wireless_dev *wdev; u8 dst[ETH_ALEN]; u8 next_hop[ETH_ALEN]; int err; int exit = 0; /* TODO: filter by device */ mutex_lock(&cfg80211_drv_mutex); list_for_each_entry(dev, &cfg80211_drv_list, list) { if (exit) break; if (++wp_idx < wp_start) continue; if_idx = 0; mutex_lock(&dev->devlist_mtx); list_for_each_entry(wdev, &dev->netdev_list, list) { if (exit) break; if (++if_idx < if_start) continue; if (!dev->ops->dump_mpath) continue; for (;; ++sta_idx) { rtnl_lock(); err = dev->ops->dump_mpath(&dev->wiphy, wdev->netdev, sta_idx, dst, next_hop, &pinfo); rtnl_unlock(); if (err) { sta_idx = 0; break; } if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, wdev->netdev, dst, next_hop, &pinfo) < 0) { exit = 1; break; } } } mutex_unlock(&dev->devlist_mtx); } mutex_unlock(&cfg80211_drv_mutex); cb->args[0] = wp_idx; cb->args[1] = if_idx; cb->args[2] = sta_idx; return skb->len; } 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, &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, &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, &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, &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 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, }, }; /* multicast groups */ static struct genl_multicast_group nl80211_config_mcgrp = { .name = "config", }; /* 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); } /* 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; return 0; err_out: genl_unregister_family(&nl80211_fam); return err; } void nl80211_exit(void) { genl_unregister_family(&nl80211_fam); }