diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-factor-out-bridge-tunnel-RFC1042-heade.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-factor-out-bridge-tunnel-RFC1042-heade.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-factor-out-bridge-tunnel-RFC1042-heade.patch b/package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-factor-out-bridge-tunnel-RFC1042-heade.patch new file mode 100644 index 0000000000..8641057869 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-factor-out-bridge-tunnel-RFC1042-heade.patch @@ -0,0 +1,76 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Fri, 2 Dec 2022 13:54:15 +0100 +Subject: [PATCH] wifi: cfg80211: factor out bridge tunnel / RFC1042 header + check + +The same check is done in multiple places, unify it. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/wireless/util.c ++++ b/net/wireless/util.c +@@ -542,6 +542,21 @@ unsigned int ieee80211_get_mesh_hdrlen(s + } + EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); + ++static bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto) ++{ ++ const __be16 *hdr_proto = hdr + ETH_ALEN; ++ ++ if (!(ether_addr_equal(hdr, rfc1042_header) && ++ *hdr_proto != htons(ETH_P_AARP) && ++ *hdr_proto != htons(ETH_P_IPX)) && ++ !ether_addr_equal(hdr, bridge_tunnel_header)) ++ return false; ++ ++ *proto = *hdr_proto; ++ ++ return true; ++} ++ + int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, + const u8 *addr, enum nl80211_iftype iftype, + u8 data_offset, bool is_amsdu) +@@ -633,14 +648,9 @@ int ieee80211_data_to_8023_exthdr(struct + + if (likely(!is_amsdu && + skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 && +- ((ether_addr_equal(payload.hdr, rfc1042_header) && +- payload.proto != htons(ETH_P_AARP) && +- payload.proto != htons(ETH_P_IPX)) || +- ether_addr_equal(payload.hdr, bridge_tunnel_header)))) { +- /* remove RFC1042 or Bridge-Tunnel encapsulation and +- * replace EtherType */ ++ ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) { ++ /* remove RFC1042 or Bridge-Tunnel encapsulation */ + hdrlen += ETH_ALEN + 2; +- tmp.h_proto = payload.proto; + skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2); + } else { + tmp.h_proto = htons(skb->len - hdrlen); +@@ -756,8 +766,6 @@ void ieee80211_amsdu_to_8023s(struct sk_ + { + unsigned int hlen = ALIGN(extra_headroom, 4); + struct sk_buff *frame = NULL; +- u16 ethertype; +- u8 *payload; + int offset = 0, remaining; + struct ethhdr eth; + bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); +@@ -811,14 +819,8 @@ void ieee80211_amsdu_to_8023s(struct sk_ + frame->dev = skb->dev; + frame->priority = skb->priority; + +- payload = frame->data; +- ethertype = (payload[6] << 8) | payload[7]; +- if (likely((ether_addr_equal(payload, rfc1042_header) && +- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || +- ether_addr_equal(payload, bridge_tunnel_header))) { +- eth.h_proto = htons(ethertype); ++ if (likely(ieee80211_get_8023_tunnel_proto(frame->data, ð.h_proto))) + skb_pull(frame, ETH_ALEN + 2); +- } + + memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); + __skb_queue_tail(list, frame); |