From 93da9cc17c5ae8a751886fd4732db89ad5e9bdb9 Mon Sep 17 00:00:00 2001 From: "colin@cozybit.com" Date: Tue, 21 Oct 2008 12:03:48 -0700 Subject: Add nl80211 commands to get and set o11s mesh networking parameters The two new commands are NL80211_CMD_GET_MESH_PARAMS and NL80211_CMD_SET_MESH_PARAMS. There is a new attribute enum, NL80211_ATTR_MESH_PARAMS, which enumerates the various mesh configuration parameters. Moved struct mesh_config from mac80211/ieee80211_i.h to net/cfg80211.h. nl80211_get_mesh_params and nl80211_set_mesh_params unpack the netlink messages and ask the driver to get or set the configuration. This is done via two new function stubs, get_mesh_params and set_mesh_params, in struct cfg80211_ops. Signed-off-by: Colin McCabe Acked-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/cfg.c | 68 ++++++++++++++++ net/mac80211/ieee80211_i.h | 21 +---- net/wireless/nl80211.c | 191 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 260 insertions(+), 20 deletions(-) (limited to 'net') diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 55e3a26510e..91f56a48e2b 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -951,6 +951,72 @@ static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev, rcu_read_unlock(); return 0; } + +static int ieee80211_get_mesh_params(struct wiphy *wiphy, + struct net_device *dev, + struct mesh_config *conf) +{ + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT) + return -ENOTSUPP; + memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config)); + return 0; +} + +static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask) +{ + return (mask >> (parm-1)) & 0x1; +} + +static int ieee80211_set_mesh_params(struct wiphy *wiphy, + struct net_device *dev, + const struct mesh_config *nconf, u32 mask) +{ + struct mesh_config *conf; + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT) + return -ENOTSUPP; + + /* Set the config options which we are interested in setting */ + conf = &(sdata->u.mesh.mshcfg); + if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask)) + conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout; + if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask)) + conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout; + if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask)) + conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout; + if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask)) + conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks; + if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask)) + conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries; + if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask)) + conf->dot11MeshTTL = nconf->dot11MeshTTL; + if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) + conf->auto_open_plinks = nconf->auto_open_plinks; + if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask)) + conf->dot11MeshHWMPmaxPREQretries = + nconf->dot11MeshHWMPmaxPREQretries; + if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask)) + conf->path_refresh_time = nconf->path_refresh_time; + if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask)) + conf->min_discovery_timeout = nconf->min_discovery_timeout; + if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask)) + conf->dot11MeshHWMPactivePathTimeout = + nconf->dot11MeshHWMPactivePathTimeout; + if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask)) + conf->dot11MeshHWMPpreqMinInterval = + nconf->dot11MeshHWMPpreqMinInterval; + if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, + mask)) + conf->dot11MeshHWMPnetDiameterTraversalTime = + nconf->dot11MeshHWMPnetDiameterTraversalTime; + return 0; +} + #endif static int ieee80211_change_bss(struct wiphy *wiphy, @@ -1007,6 +1073,8 @@ struct cfg80211_ops mac80211_config_ops = { .change_mpath = ieee80211_change_mpath, .get_mpath = ieee80211_get_mpath, .dump_mpath = ieee80211_dump_mpath, + .set_mesh_params = ieee80211_set_mesh_params, + .get_mesh_params = ieee80211_get_mesh_params, #endif .change_bss = ieee80211_change_bss, }; diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index fe4efdd4253..2c91108e390 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -247,26 +248,6 @@ struct mesh_preq_queue { u8 flags; }; -struct mesh_config { - /* Timeouts in ms */ - /* Mesh plink management parameters */ - u16 dot11MeshRetryTimeout; - u16 dot11MeshConfirmTimeout; - u16 dot11MeshHoldingTimeout; - u16 dot11MeshMaxPeerLinks; - u8 dot11MeshMaxRetries; - u8 dot11MeshTTL; - bool auto_open_plinks; - /* HWMP parameters */ - u8 dot11MeshHWMPmaxPREQretries; - u32 path_refresh_time; - u16 min_discovery_timeout; - u32 dot11MeshHWMPactivePathTimeout; - u16 dot11MeshHWMPpreqMinInterval; - u16 dot11MeshHWMPnetDiameterTraversalTime; -}; - - /* flags used in struct ieee80211_if_sta.flags */ #define IEEE80211_STA_SSID_SET BIT(0) #define IEEE80211_STA_BSSID_SET BIT(1) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 2b87aec231e..9a16e9e6c5c 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -96,6 +96,8 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = { [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 }, [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 }, + [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED }, + [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY, .len = NL80211_HT_CAPABILITY_LEN }, }; @@ -1698,6 +1700,183 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) 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_set_reg(struct sk_buff *skb, struct genl_info *info) { struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1]; @@ -1915,6 +2094,18 @@ static struct genl_ops nl80211_ops[] = { .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, + }, }; /* multicast groups */ -- cgit