net/mac80211/ap.c

Source file repositories/reference/linux-study-clean/net/mac80211/ap.c

File Facts

System
Linux kernel
Corpus path
net/mac80211/ap.c
Extension
.c
Size
9769 bytes
Lines
354
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

if (control & IEEE80211_EML_CTRL_EMLSR_PARAM_UPDATE) {
			u8 pad_delay, trans_delay;

			pad_delay = u8_get_bits(ptr[2],
						IEEE80211_EML_EMLSR_PAD_DELAY);
			if (pad_delay >
			    IEEE80211_EML_CAP_EML_PADDING_DELAY_256US)
				return;

			trans_delay = u8_get_bits(ptr[2],
					IEEE80211_EML_EMLSR_TRANS_DELAY);
			if (trans_delay >
			    IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_256US)
				return;

			/* Update sta padding and transition delay */
			sta->sta.eml_cap =
				u8_replace_bits(sta->sta.eml_cap,
						pad_delay,
						IEEE80211_EML_CAP_EML_PADDING_DELAY);
			sta->sta.eml_cap =
				u8_replace_bits(sta->sta.eml_cap,
						trans_delay,
						IEEE80211_EML_CAP_EML_TRANSITION_DELAY);
		}
	}

	if (control & IEEE80211_EML_CTRL_EMLMR_MODE) {
		u8 mcs_map_size;
		int i;

		if (!(ift_ext_capa->eml_capabilities &
		      IEEE80211_EML_CAP_EMLMR_SUPPORT))
			return;

		opt_len += sizeof(__le16); /* eMLMR link_bitmap */
		opt_len++; /* eMLMR mcs_map_count */
		if (skb->len < len + opt_len)
			return;

		eml_params.emlmr_mcs_map_count = ptr[2];
		if (eml_params.emlmr_mcs_map_count > 2)
			return;

		mcs_map_size = 3 * (1 + eml_params.emlmr_mcs_map_count);
		opt_len += mcs_map_size;
		if (skb->len < len + opt_len)
			return;

		for (i = 0; i < mcs_map_size; i++) {
			u8 rx_mcs, tx_mcs;

			rx_mcs = u8_get_bits(ptr[3 + i],
					     IEEE80211_EML_EMLMR_RX_MCS_MAP);
			if (rx_mcs > 8)
				return;

			tx_mcs = u8_get_bits(ptr[3 + i],
					     IEEE80211_EML_EMLMR_TX_MCS_MAP);
			if (tx_mcs > 8)
				return;
		}

		memcpy(eml_params.emlmr_mcs_map_bw, &ptr[3], mcs_map_size);
	}

	if ((control & IEEE80211_EML_CTRL_EMLSR_MODE) ||
	    (control & IEEE80211_EML_CTRL_EMLMR_MODE)) {
		eml_params.link_bitmap = get_unaligned_le16(ptr);
		if ((eml_params.link_bitmap & sdata->vif.active_links) !=
		    eml_params.link_bitmap)
			return;
	}

	if (drv_set_eml_op_mode(sdata, &sta->sta, &eml_params))
		return;

	ieee80211_send_eml_op_mode_notif(sdata, mgmt, opt_len);
}

static void
ieee80211_rx_uhr_link_reconfig_req(struct ieee80211_sub_if_data *sdata,
				   struct sk_buff *skb)
{
	struct ieee80211_mgmt *mgmt = (void *)skb->data;
	const struct element *sub;
	struct sta_info *sta;

	/*
	 * rx.c only accepts IEEE80211_UHR_LINK_RECONFIG_REQUEST_OMP_REQUEST

Annotation

Implementation Notes