From: Michael Wu <flamingice@xxxxxxxxxxxx>
This allows precise control over what a monitor interface shows.
Signed-off-by: Michael Wu <flamingice@xxxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
include/linux/nl80211.h | 35 +++++++++++++++++++++++++++++++++++
include/net/cfg80211.h | 24 ++++++++++++++++++++++--
net/mac80211/cfg.c | 4 ++--
net/wireless/nl80211.c | 44 ++++++++++++++++++++++++++++++++++++++++++--
4 files changed, 101 insertions(+), 6 deletions(-)
--- everything.orig/include/linux/nl80211.h 2008-01-31 15:45:56.535794433 +0100
+++ everything/include/linux/nl80211.h 2008-01-31 15:46:10.795795138 +0100
@@ -164,6 +164,9 @@ enum nl80211_commands {
* @NL80211_ATTR_WIPHY_BANDS: Information about an operating bands,
* consisting of a nested array.
*
+ * @NL80211_ATTR_MNTR_FLAGS: flags, nested element with NLA_FLAG attributes of
+ * &enum nl80211_mntr_flags.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -200,6 +203,8 @@ enum nl80211_attrs {
NL80211_ATTR_WIPHY_BANDS,
+ NL80211_ATTR_MNTR_FLAGS,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -344,4 +349,34 @@ enum nl80211_bitrate_attr {
NL80211_BITRATE_ATTR_MAX = __NL80211_BITRATE_ATTR_AFTER_LAST - 1
};
+/**
+ * enum nl80211_mntr_flags - monitor configuration flags
+ *
+ * Monitor configuration flags.
+ *
+ * @__NL80211_MNTR_FLAG_INVALID: reserved
+ *
+ * @NL80211_MNTR_FLAG_FCSFAIL: pass frames with bad FCS
+ * @NL80211_MNTR_FLAG_PLCPFAIL: pass frames with bad PLCP
+ * @NL80211_MNTR_FLAG_CONTROL: pass control frames
+ * @NL80211_MNTR_FLAG_OTHER_BSS: disable BSSID filtering
+ * @NL80211_MNTR_FLAG_COOK_FRAMES: report frames after processing.
+ * overrides all other flags.
+ *
+ * @__NL80211_MNTR_FLAG_AFTER_LAST: internal use
+ * @NL80211_MNTR_FLAG_MAX: highest possible monitor flag
+ */
+enum nl80211_mntr_flags {
+ __NL80211_MNTR_FLAG_INVALID,
+ NL80211_MNTR_FLAG_FCSFAIL,
+ NL80211_MNTR_FLAG_PLCPFAIL,
+ NL80211_MNTR_FLAG_CONTROL,
+ NL80211_MNTR_FLAG_OTHER_BSS,
+ NL80211_MNTR_FLAG_COOK_FRAMES,
+
+ /* keep last */
+ __NL80211_MNTR_FLAG_AFTER_LAST,
+ NL80211_MNTR_FLAG_MAX = __NL80211_MNTR_FLAG_AFTER_LAST - 1
+};
+
#endif /* __LINUX_NL80211_H */
--- everything.orig/include/net/cfg80211.h 2008-01-31 15:45:56.615793023 +0100
+++ everything/include/net/cfg80211.h 2008-01-31 15:46:10.795795138 +0100
@@ -163,6 +163,26 @@ struct station_stats {
u32 tx_bytes;
};
+/**
+ * enum monitor_flags - monitor flags
+ *
+ * Monitor interface configuration flags. Note that these must be the bits
+ * according to the nl80211 flags.
+ *
+ * @MONITOR_FLAG_FCSFAIL: pass frames with bad FCS
+ * @MONITOR_FLAG_PLCPFAIL: pass frames with bad PLCP
+ * @MONITOR_FLAG_CONTROL: pass control frames
+ * @MONITOR_FLAG_OTHER_BSS: disable BSSID filtering
+ * @MONITOR_FLAG_COOK_FRAMES: report frames after processing
+ */
+enum monitor_flags {
+ MONITOR_FLAG_FCSFAIL = 1<<NL80211_MNTR_FLAG_FCSFAIL,
+ MONITOR_FLAG_PLCPFAIL = 1<<NL80211_MNTR_FLAG_PLCPFAIL,
+ MONITOR_FLAG_CONTROL = 1<<NL80211_MNTR_FLAG_CONTROL,
+ MONITOR_FLAG_OTHER_BSS = 1<<NL80211_MNTR_FLAG_OTHER_BSS,
+ MONITOR_FLAG_COOK_FRAMES = 1<<NL80211_MNTR_FLAG_COOK_FRAMES,
+};
+
/* from net/wireless.h */
struct wiphy;
@@ -213,10 +233,10 @@ struct wiphy;
*/
struct cfg80211_ops {
int (*add_virtual_intf)(struct wiphy *wiphy, char *name,
- enum nl80211_iftype type);
+ enum nl80211_iftype type, u32 *flags);
int (*del_virtual_intf)(struct wiphy *wiphy, int ifindex);
int (*change_virtual_intf)(struct wiphy *wiphy, int ifindex,
- enum nl80211_iftype type);
+ enum nl80211_iftype type, u32 *flags);
int (*add_key)(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index, u8 *mac_addr,
--- everything.orig/net/mac80211/cfg.c 2008-01-31 15:45:59.195794920 +0100
+++ everything/net/mac80211/cfg.c 2008-01-31 15:46:10.825789821 +0100
@@ -34,7 +34,7 @@ nl80211_type_to_mac80211_type(enum nl802
}
static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
- enum nl80211_iftype type)
+ enum nl80211_iftype type, u32 *flags)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
enum ieee80211_if_types itype;
@@ -69,7 +69,7 @@ static int ieee80211_del_iface(struct wi
}
static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
- enum nl80211_iftype type)
+ enum nl80211_iftype type, u32 *flags)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct net_device *dev;
--- everything.orig/net/wireless/nl80211.c 2008-01-31 15:45:56.725795193 +0100
+++ everything/net/wireless/nl80211.c 2008-01-31 15:46:10.825789821 +0100
@@ -82,6 +82,7 @@ static struct nla_policy nl80211_policy[
[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
+ [NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
};
/* message building helper */
@@ -336,12 +337,42 @@ static int nl80211_get_interface(struct
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;
int err, ifindex;
enum nl80211_iftype type;
struct net_device *dev;
+ u32 flags;
if (info->attrs[NL80211_ATTR_IFTYPE]) {
type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
@@ -362,7 +393,11 @@ static int nl80211_set_interface(struct
}
rtnl_lock();
- err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, type);
+ 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);
rtnl_unlock();
unlock:
@@ -375,6 +410,7 @@ static int nl80211_new_interface(struct
struct cfg80211_registered_device *drv;
int err;
enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
+ u32 flags;
if (!info->attrs[NL80211_ATTR_IFNAME])
return -EINVAL;
@@ -395,8 +431,12 @@ static int nl80211_new_interface(struct
}
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);
+ nla_data(info->attrs[NL80211_ATTR_IFNAME]),
+ type, err ? NULL : &flags);
rtnl_unlock();
unlock:
--
-
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