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add definitions for various control frames and a minimum-sized frame that

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we use to define IEEE80211_MIN_LEN; the minimal length for frames drivers
may pass up into the 802.11 layer
This commit is contained in:
Sam Leffler 2003-09-15 19:36:34 +00:00
parent 516b220f3e
commit 993338b6ab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=120098
1 changed files with 51 additions and 0 deletions
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51
sys/net80211/ieee80211.h
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@ -135,6 +135,55 @@ struct ieee80211_frame_addr4 {
#define IEEE80211_NWID_LEN 32
/*
* Control frames.
*/
struct ieee80211_frame_min {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_addr1[IEEE80211_ADDR_LEN];
u_int8_t i_addr2[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
struct ieee80211_frame_rts {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_ra[IEEE80211_ADDR_LEN];
u_int8_t i_ta[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
struct ieee80211_frame_cts {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_ra[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
struct ieee80211_frame_ack {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_ra[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
struct ieee80211_frame_pspoll {
u_int8_t i_fc[2];
u_int8_t i_aid[2];
u_int8_t i_bssid[IEEE80211_ADDR_LEN];
u_int8_t i_ta[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
struct ieee80211_frame_cfend { /* NB: also CF-End+CF-Ack */
u_int8_t i_fc[2];
u_int8_t i_dur[2]; /* should be zero */
u_int8_t i_ra[IEEE80211_ADDR_LEN];
u_int8_t i_bssid[IEEE80211_ADDR_LEN];
/* FCS */
} __attribute__((__packed__));
/*
* BEACON management packets
*
@ -314,6 +363,8 @@ enum {
#define IEEE80211_MTU 1500
#define IEEE80211_MAX_LEN (2300 + IEEE80211_CRC_LEN + \
(IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN))
#define IEEE80211_MIN_LEN \
(sizeof(struct ieee80211_frame_min) + IEEE80211_CRC_LEN)
/*
* RTS frame length parameters. The default is specified in