Date: Sun, 16 Mar 2008 02:31:24 GMT From: Sam Leffler <sam@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 137817 for review Message-ID: <200803160231.m2G2VO4B011770@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=137817 Change 137817 by sam@sam_ebb on 2008/03/16 02:30:50 add routines to alloc+build rts and cts frames; inspired by similar routines in openbsd Affected files ... .. //depot/projects/vap/sys/net80211/ieee80211_output.c#39 edit .. //depot/projects/vap/sys/net80211/ieee80211_proto.h#18 edit Differences ... ==== //depot/projects/vap/sys/net80211/ieee80211_output.c#39 (text+ko) ==== @@ -543,7 +543,7 @@ return EIO; /* XXX */ } - MGETHDR(m, M_NOWAIT, MT_HEADER); + m = m_gethdr(M_NOWAIT, MT_HEADER); if (m == NULL) { /* XXX debug msg */ ieee80211_unref_node(&ni); @@ -2246,6 +2246,59 @@ return ic->ic_raw_xmit(bss, m, NULL); } +/* + * Allocate and build a RTS (Request To Send) control frame. + */ +struct mbuf * +ieee80211_alloc_rts(struct ieee80211com *ic, + const uint8_t ra[IEEE80211_ADDR_LEN], + const uint8_t ta[IEEE80211_ADDR_LEN], + uint16_t dur) +{ + struct ieee80211_frame_rts *rts; + struct mbuf *m; + + /* XXX honor ic_headroom */ + m = m_gethdr(M_DONTWAIT, MT_DATA); + if (m != NULL) { + 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; + *(u_int16_t *)rts->i_dur = htole16(dur); + IEEE80211_ADDR_COPY(rts->i_ra, ra); + IEEE80211_ADDR_COPY(rts->i_ta, ta); + + m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); + } + return m; +} + +/* + * Allocate and build a CTS (Clear To Send) control frame. + */ +struct mbuf * +ieee80211_alloc_cts(struct ieee80211com *ic, + const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) +{ + struct ieee80211_frame_cts *cts; + struct mbuf *m; + + /* XXX honor ic_headroom */ + m = m_gethdr(M_DONTWAIT, MT_DATA); + if (m != NULL) { + 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; + *(u_int16_t *)cts->i_dur = htole16(dur); + IEEE80211_ADDR_COPY(cts->i_ra, ra); + + m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); + } + return m; +} + static void ieee80211_tx_mgt_timeout(void *arg) { ==== //depot/projects/vap/sys/net80211/ieee80211_proto.h#18 (text+ko) ==== @@ -91,6 +91,11 @@ struct mbuf *ieee80211_alloc_proberesp(struct ieee80211_node *, int); int ieee80211_send_proberesp(struct ieee80211vap *, const uint8_t da[IEEE80211_ADDR_LEN], int); +struct mbuf *ieee80211_alloc_rts(struct ieee80211com *ic, + const uint8_t [IEEE80211_ADDR_LEN], + const uint8_t [IEEE80211_ADDR_LEN], uint16_t); +struct mbuf *ieee80211_alloc_cts(struct ieee80211com *, + const uint8_t [IEEE80211_ADDR_LEN], uint16_t); void ieee80211_reset_erp(struct ieee80211com *); void ieee80211_set_shortslottime(struct ieee80211com *, int onoff);
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