diff options
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 1 | ||||
| -rw-r--r-- | net/mac80211/util.c | 28 |
2 files changed, 29 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 74d5fc5889bb..d17d73e8d19f 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2193,6 +2193,7 @@ ieee802_11_parse_elems(const u8 *start, size_t len, bool action, return ieee802_11_parse_elems_crc(start, len, action, 0, 0, bss); } +void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos); extern const int ieee802_1d_to_ac[8]; diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 6d6ba23aa074..2ff8d1ec564c 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -4780,3 +4780,31 @@ u8 *ieee80211_ie_build_eht_cap(u8 *pos, return pos; } + +void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos) +{ + unsigned int elem_len; + + if (!len_pos) + return; + + elem_len = skb->data + skb->len - len_pos - 1; + + while (elem_len > 255) { + /* this one is 255 */ + *len_pos = 255; + /* remaining data gets smaller */ + elem_len -= 255; + /* make space for the fragment ID/len in SKB */ + skb_put(skb, 2); + /* shift back the remaining data to place fragment ID/len */ + memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); + /* place the fragment ID */ + len_pos += 255 + 1; + *len_pos = WLAN_EID_FRAGMENT; + /* and point to fragment length to update later */ + len_pos++; + } + + *len_pos = elem_len; +} |