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mac80211_hwsim: add permanent mac address option for new radios

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If simulation needs predictable permanent mac addresses of hwsim wireless
phy, this patch add the ability to create a new radio with a user defined
permanent mac address. Allowed mac addresses needs to be locally
administrated mac addresses (as also the former fixed 42:* and 02:* were).

To do not break the operation with legacy software using hwsim, the new
address is set twice. The problem here is, the netlink call backs use
wiphy->addresses[1] as identification of a radio and not the proposed
permanent address (wiphy->addresses[0]). This design decision is not
documented in the kernel repo, therefore this patch simply reproduces this,
but with the same address.

Signed-off-by: Benjamin Beichler <benjamin.beichler@uni-rostock.de>
[make pointer const]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Beichler
2018-01-22 18:04:35 +01:00
committed by Johannes Berg
parent 91e6dd8284
commit cb1a5bae56
2 changed files with 42 additions and 10 deletions
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9
drivers/net/wireless/mac80211_hwsim.h
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@@ -68,7 +68,12 @@ enum hwsim_tx_control_flags {
* %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
* @HWSIM_CMD_NEW_RADIO: create a new radio with the given parameters,
* returns the radio ID (>= 0) or negative on errors, if successful
* then multicast the result
* then multicast the result, uses optional parameter:
* %HWSIM_ATTR_REG_STRICT_REG, %HWSIM_ATTR_SUPPORT_P2P_DEVICE,
* %HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE, %HWSIM_ATTR_CHANNELS,
* %HWSIM_ATTR_NO_VIF, %HWSIM_ATTR_RADIO_NAME, %HWSIM_ATTR_USE_CHANCTX,
* %HWSIM_ATTR_REG_HINT_ALPHA2, %HWSIM_ATTR_REG_CUSTOM_REG,
* %HWSIM_ATTR_PERM_ADDR
* @HWSIM_CMD_DEL_RADIO: destroy a radio, reply is multicasted
* @HWSIM_CMD_GET_RADIO: fetch information about existing radios, uses:
* %HWSIM_ATTR_RADIO_ID
@@ -126,6 +131,7 @@ enum {
* @HWSIM_ATTR_FREQ: Frequency at which packet is transmitted or received.
* @HWSIM_ATTR_TX_INFO_FLAGS: additional flags for corresponding
* rates of %HWSIM_ATTR_TX_INFO
* @HWSIM_ATTR_PERM_ADDR: permanent mac address of new radio
* @__HWSIM_ATTR_MAX: enum limit
*/
@@ -153,6 +159,7 @@ enum {
HWSIM_ATTR_FREQ,
HWSIM_ATTR_PAD,
HWSIM_ATTR_TX_INFO_FLAGS,
HWSIM_ATTR_PERM_ADDR,
__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)