From b59fb5461166680c5e4e9df06b29debca33ee941 Mon Sep 17 00:00:00 2001 From: Beni Lev Date: Thu, 10 Feb 2022 20:16:50 +0100 Subject: [PATCH] mac80211_hwsim: Add debugfs to control rx status RSSI Set the base RSSI of a TX frame. The final RSSI of the frame will be the base RSSI + the radio's TX power Signed-off-by: Beni Lev Link: https://lore.kernel.org/r/20220210201649.dddebbb55a7f.I6c0607694587b577070339078829fcc20dfcfe2c@changeid Signed-off-by: Johannes Berg --- drivers/net/wireless/mac80211_hwsim.c | 36 +++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 8d54f9face2f..ac1caf659e0b 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -503,6 +503,8 @@ static const struct ieee80211_rate hwsim_rates[] = { { .bitrate = 540 } }; +#define DEFAULT_RX_RSSI -50 + static const u32 hwsim_ciphers[] = { WLAN_CIPHER_SUITE_WEP40, WLAN_CIPHER_SUITE_WEP104, @@ -690,6 +692,9 @@ struct mac80211_hwsim_data { u64 rx_bytes; u64 tx_dropped; u64 tx_failed; + + /* RSSI in rx status of the receiver */ + int rx_rssi; }; static const struct rhashtable_params hwsim_rht_params = { @@ -964,6 +969,29 @@ DEFINE_DEBUGFS_ATTRIBUTE(hwsim_fops_group, hwsim_fops_group_read, hwsim_fops_group_write, "%llx\n"); +static int hwsim_fops_rx_rssi_read(void *dat, u64 *val) +{ + struct mac80211_hwsim_data *data = dat; + *val = data->rx_rssi; + return 0; +} + +static int hwsim_fops_rx_rssi_write(void *dat, u64 val) +{ + struct mac80211_hwsim_data *data = dat; + int rssi = (int)val; + + if (rssi >= 0 || rssi < -100) + return -EINVAL; + + data->rx_rssi = rssi; + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_rx_rssi, + hwsim_fops_rx_rssi_read, hwsim_fops_rx_rssi_write, + "%lld\n"); + static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev) { @@ -1482,8 +1510,8 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, rx_status.bw = RATE_INFO_BW_20; if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; - /* TODO: simulate real signal strength (and optional packet loss) */ - rx_status.signal = -50; + /* TODO: simulate optional packet loss */ + rx_status.signal = data->rx_rssi; if (info->control.vif) rx_status.signal += info->control.vif->bss_conf.txpower; @@ -3309,6 +3337,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, hw->wiphy->n_cipher_suites = param->n_ciphers; } + data->rx_rssi = DEFAULT_RX_RSSI; + INIT_DELAYED_WORK(&data->roc_start, hw_roc_start); INIT_DELAYED_WORK(&data->roc_done, hw_roc_done); INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work); @@ -3500,6 +3530,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps); debugfs_create_file("group", 0666, data->debugfs, data, &hwsim_fops_group); + debugfs_create_file("rx_rssi", 0666, data->debugfs, data, + &hwsim_fops_rx_rssi); if (!data->use_chanctx) debugfs_create_file("dfs_simulate_radar", 0222, data->debugfs,