Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2007-2012 Siemens AG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Written by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/crc-ccitt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <net/mac802154.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <net/ieee802154_netdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/nl802154.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "ieee802154_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) static int ieee802154_deliver_skb(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	skb->ip_summed = CHECKSUM_UNNECESSARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	skb->protocol = htons(ETH_P_IEEE802154);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	return netif_receive_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		       struct sk_buff *skb, const struct ieee802154_hdr *hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	__le16 span, sshort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	span = wpan_dev->pan_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	sshort = wpan_dev->short_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	switch (mac_cb(skb)->dest.mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	case IEEE802154_ADDR_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 			/* FIXME: check if we are PAN coordinator */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 			skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			/* ACK comes with both addresses empty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			skb->pkt_type = PACKET_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	case IEEE802154_ADDR_LONG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		if (mac_cb(skb)->dest.pan_id != span &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 			skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		else if (mac_cb(skb)->dest.extended_addr == wpan_dev->extended_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			skb->pkt_type = PACKET_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	case IEEE802154_ADDR_SHORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		if (mac_cb(skb)->dest.pan_id != span &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		else if (mac_cb(skb)->dest.short_addr == sshort)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			skb->pkt_type = PACKET_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		else if (mac_cb(skb)->dest.short_addr ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			  cpu_to_le16(IEEE802154_ADDR_BROADCAST))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			skb->pkt_type = PACKET_BROADCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		pr_debug("invalid dest mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	skb->dev = sdata->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/* TODO this should be moved after netif_receive_skb call, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	 * wireshark will show a mac header with security fields and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	 * payload is already decrypted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		pr_debug("decryption failed: %i\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	sdata->dev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	sdata->dev->stats.rx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	switch (mac_cb(skb)->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	case IEEE802154_FC_TYPE_BEACON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	case IEEE802154_FC_TYPE_ACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	case IEEE802154_FC_TYPE_MAC_CMD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	case IEEE802154_FC_TYPE_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return ieee802154_deliver_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		pr_warn_ratelimited("ieee802154: bad frame received "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 				    "(type = %d)\n", mac_cb(skb)->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ieee802154_print_addr(const char *name, const struct ieee802154_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (addr->mode == IEEE802154_ADDR_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		pr_debug("%s not present\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	if (addr->mode == IEEE802154_ADDR_SHORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		pr_debug("%s is short: %04x\n", name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			 le16_to_cpu(addr->short_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		u64 hw = swab64((__force u64)addr->extended_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		pr_debug("%s is hardware: %8phC\n", name, &hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ieee802154_parse_frame_start(struct sk_buff *skb, struct ieee802154_hdr *hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	int hlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct ieee802154_mac_cb *cb = mac_cb_init(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	hlen = ieee802154_hdr_pull(skb, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (hlen < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	skb->mac_len = hlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		 hdr->seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	cb->type = hdr->fc.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	cb->ackreq = hdr->fc.ack_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	cb->secen = hdr->fc.security_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	ieee802154_print_addr("destination", &hdr->dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	ieee802154_print_addr("source", &hdr->source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	cb->source = hdr->source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	cb->dest = hdr->dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (hdr->fc.security_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		u64 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		pr_debug("seclevel %i\n", hdr->sec.level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		switch (hdr->sec.key_id_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		case IEEE802154_SCF_KEY_IMPLICIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			pr_debug("implicit key\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		case IEEE802154_SCF_KEY_INDEX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			pr_debug("key %02x\n", hdr->sec.key_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		case IEEE802154_SCF_KEY_SHORT_INDEX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			pr_debug("key %04x:%04x %02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				 le32_to_cpu(hdr->sec.short_src) >> 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				 le32_to_cpu(hdr->sec.short_src) & 0xffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 				 hdr->sec.key_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		case IEEE802154_SCF_KEY_HW_INDEX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			key = swab64((__force u64)hdr->sec.extended_src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			pr_debug("key source %8phC %02x\n", &key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 				 hdr->sec.key_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) __ieee802154_rx_handle_packet(struct ieee802154_local *local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			      struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	struct ieee802154_sub_if_data *sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	struct ieee802154_hdr hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	ret = ieee802154_parse_frame_start(skb, &hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		pr_debug("got invalid frame\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		if (sdata->wpan_dev.iftype != NL802154_IFTYPE_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		if (!ieee802154_sdata_running(sdata))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		ieee802154_subif_frame(sdata, skb, &hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ieee802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	struct sk_buff *skb2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	struct ieee802154_sub_if_data *sdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	skb->ip_summed = CHECKSUM_UNNECESSARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	skb->protocol = htons(ETH_P_IEEE802154);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		if (!ieee802154_sdata_running(sdata))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		skb2 = skb_clone(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		if (skb2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			skb2->dev = sdata->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			ieee802154_deliver_skb(skb2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			sdata->dev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			sdata->dev->stats.rx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	u16 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	WARN_ON_ONCE(softirq_count() == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (local->suspended)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	/* TODO: When a transceiver omits the checksum here, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	 * add an own calculated one. This is currently an ugly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	 * solution because the monitor needs a crc here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (local->hw.flags & IEEE802154_HW_RX_OMIT_CKSUM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		crc = crc_ccitt(0, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		put_unaligned_le16(crc, skb_put(skb, 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	ieee802154_monitors_rx(local, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	/* Check if transceiver doesn't validate the checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	 * If not we validate the checksum here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (local->hw.flags & IEEE802154_HW_RX_DROP_BAD_CKSUM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		crc = crc_ccitt(0, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		if (crc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	/* remove crc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	skb_trim(skb, skb->len - 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	__ieee802154_rx_handle_packet(local, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	struct ieee802154_local *local = hw_to_local(hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	mac_cb(skb)->lqi = lqi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	skb->pkt_type = IEEE802154_RX_MSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	skb_queue_tail(&local->skb_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	tasklet_schedule(&local->tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) EXPORT_SYMBOL(ieee802154_rx_irqsafe);