From f130347c2dd8e7ce0757cd3cf80bedbc6ed63c4c Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Fri, 30 Jan 2009 09:26:42 -0800 Subject: cfg80211: add get reg command This lets userspace request to get the currently set regulatory domain. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- net/wireless/nl80211.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) (limited to 'net/wireless/nl80211.c') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index e69da8d2047..d452396006e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2093,6 +2093,81 @@ static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info) #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]; @@ -2332,6 +2407,12 @@ static struct genl_ops nl80211_ops[] = { .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, -- cgit v1.2.3