[src/trunk]: src/sys/net80211 add ieee80211_get_rts and ieee80211_get_cts_to_...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f6dfed9a70e9
branches:  trunk
changeset: 762494:f6dfed9a70e9
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Feb 21 23:50:08 2011 +0000

description:
add ieee80211_get_rts and ieee80211_get_cts_to_self from openbsd, ok dyoung@

diffstat:

 sys/net80211/ieee80211_output.c |  56 +++++++++++++++++++++++++++++++++++++++-
 sys/net80211/ieee80211_proto.h  |   6 +++-
 2 files changed, 59 insertions(+), 3 deletions(-)

diffs (97 lines):

diff -r 6e2c348244c4 -r f6dfed9a70e9 sys/net80211/ieee80211_output.c
--- a/sys/net80211/ieee80211_output.c   Mon Feb 21 23:31:00 2011 +0000
+++ b/sys/net80211/ieee80211_output.c   Mon Feb 21 23:50:08 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ieee80211_output.c,v 1.49 2010/01/19 22:08:17 pooka Exp $      */
+/*     $NetBSD: ieee80211_output.c,v 1.50 2011/02/21 23:50:08 jmcneill Exp $   */
 /*-
  * Copyright (c) 2001 Atsushi Onoe
  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
@@ -36,7 +36,7 @@
 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_output.c,v 1.34 2005/08/10 16:22:29 sam Exp $");
 #endif
 #ifdef __NetBSD__
-__KERNEL_RCSID(0, "$NetBSD: ieee80211_output.c,v 1.49 2010/01/19 22:08:17 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ieee80211_output.c,v 1.50 2011/02/21 23:50:08 jmcneill Exp $");
 #endif
 
 #include "opt_inet.h"
@@ -1706,6 +1706,58 @@
 }
 
 /*
+ * Build a RTS (Request To Send) control frame.
+ */
+struct mbuf *
+ieee80211_get_rts(struct ieee80211com *ic, const struct ieee80211_frame *wh,
+    uint16_t dur)
+{
+       struct ieee80211_frame_rts *rts;
+       struct mbuf *m;
+
+       MGETHDR(m, M_DONTWAIT, MT_DATA);
+       if (m == NULL)
+               return NULL;
+
+       m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
+
+       rts = mtod(m, struct ieee80211_frame_rts *);
+       rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL |
+           IEEE80211_FC0_SUBTYPE_RTS;
+       rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
+       *(uint16_t *)rts->i_dur = htole16(dur);
+       IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1);
+       IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2);
+
+       return m;
+}
+
+/*
+ * Build a CTS-to-self (Clear To Send) control frame.
+ */
+struct mbuf *
+ieee80211_get_cts_to_self(struct ieee80211com *ic, uint16_t dur)
+{
+       struct ieee80211_frame_cts *cts;
+       struct mbuf *m;
+
+       MGETHDR(m, M_DONTWAIT, MT_DATA);
+       if (m == NULL)
+               return NULL;
+
+       m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
+
+       cts = mtod(m, struct ieee80211_frame_cts *);
+       cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL |
+           IEEE80211_FC0_SUBTYPE_CTS;
+       cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
+       *(uint16_t *)cts->i_dur = htole16(dur);
+       IEEE80211_ADDR_COPY(cts->i_ra, ic->ic_myaddr);
+
+       return m;
+}
+
+/*
  * Allocate a beacon frame and fillin the appropriate bits.
  */
 struct mbuf *
diff -r 6e2c348244c4 -r f6dfed9a70e9 sys/net80211/ieee80211_proto.h
--- a/sys/net80211/ieee80211_proto.h    Mon Feb 21 23:31:00 2011 +0000
+++ b/sys/net80211/ieee80211_proto.h    Mon Feb 21 23:50:08 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ieee80211_proto.h,v 1.17 2008/07/28 17:54:02 christos Exp $    */
+/*     $NetBSD: ieee80211_proto.h,v 1.18 2011/02/21 23:50:08 jmcneill Exp $    */
 /*-
  * Copyright (c) 2001 Atsushi Onoe
  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
@@ -78,6 +78,10 @@
                struct ieee80211_node *);
 struct mbuf *ieee80211_encap(struct ieee80211com *, struct mbuf *,
                struct ieee80211_node *);
+struct mbuf *ieee80211_get_rts(struct ieee80211com *,
+               const struct ieee80211_frame *, uint16_t);
+struct mbuf *ieee80211_get_cts_to_self(struct ieee80211com *,
+               uint16_t);
 void   ieee80211_pwrsave(struct ieee80211com *, struct ieee80211_node *, 
                struct mbuf *);