From 00b3ed1685089ff52169a715de11106ed37df087 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 2 Oct 2008 11:29:28 -0700 Subject: Staging: add wlan-ng prism2 usb driver This adds the wlan-ng prism2 USB driver to the drivers/staging tree. The code was originally written by the linux-wlan-ng team, patched by some Novell engineers to properly work on newer kernels, and then hacked into place in order to get it to build properly in a single subdirectory within the kernel tree by me. It supports a wide range of older USB prism2 devices, and contains a 80211 stack to support this single driver. Cc: Christian Zoz Cc: Andreas Gruenbacher Cc: linux-wireless Cc: John Linville Cc: Helmut Schaa Cc: linux-wlan-ng Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wlan-ng/p80211conv.c | 683 +++++++++++++++++++++++++++++++++++ 1 file changed, 683 insertions(+) create mode 100644 drivers/staging/wlan-ng/p80211conv.c (limited to 'drivers/staging/wlan-ng/p80211conv.c') diff --git a/drivers/staging/wlan-ng/p80211conv.c b/drivers/staging/wlan-ng/p80211conv.c new file mode 100644 index 000000000000..68121b9b34fa --- /dev/null +++ b/drivers/staging/wlan-ng/p80211conv.c @@ -0,0 +1,683 @@ +/* src/p80211/p80211conv.c +* +* Ether/802.11 conversions and packet buffer routines +* +* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. +* -------------------------------------------------------------------- +* +* linux-wlan +* +* The contents of this file are subject to the Mozilla Public +* License Version 1.1 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.mozilla.org/MPL/ +* +* Software distributed under the License is distributed on an "AS +* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or +* implied. See the License for the specific language governing +* rights and limitations under the License. +* +* Alternatively, the contents of this file may be used under the +* terms of the GNU Public License version 2 (the "GPL"), in which +* case the provisions of the GPL are applicable instead of the +* above. If you wish to allow the use of your version of this file +* only under the terms of the GPL and not to allow others to use +* your version of this file under the MPL, indicate your decision +* by deleting the provisions above and replace them with the notice +* and other provisions required by the GPL. If you do not delete +* the provisions above, a recipient may use your version of this +* file under either the MPL or the GPL. +* +* -------------------------------------------------------------------- +* +* Inquiries regarding the linux-wlan Open Source project can be +* made directly to: +* +* AbsoluteValue Systems Inc. +* info@linux-wlan.com +* http://www.linux-wlan.com +* +* -------------------------------------------------------------------- +* +* Portions of the development of this software were funded by +* Intersil Corporation as part of PRISM(R) chipset product development. +* +* -------------------------------------------------------------------- +* +* This file defines the functions that perform Ethernet to/from +* 802.11 frame conversions. +* +* -------------------------------------------------------------------- +*/ +/*================================================================*/ +/* System Includes */ + +#define __NO_VERSION__ /* prevent the static definition */ + + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "version.h" +#include "wlan_compat.h" + +/*================================================================*/ +/* Project Includes */ + +#include "p80211types.h" +#include "p80211hdr.h" +#include "p80211conv.h" +#include "p80211mgmt.h" +#include "p80211msg.h" +#include "p80211netdev.h" +#include "p80211ioctl.h" +#include "p80211req.h" + + +/*================================================================*/ +/* Local Constants */ + +/*================================================================*/ +/* Local Macros */ + + +/*================================================================*/ +/* Local Types */ + + +/*================================================================*/ +/* Local Static Definitions */ + +static UINT8 oui_rfc1042[] = {0x00, 0x00, 0x00}; +static UINT8 oui_8021h[] = {0x00, 0x00, 0xf8}; + +/*================================================================*/ +/* Local Function Declarations */ + + +/*================================================================*/ +/* Function Definitions */ + +/*---------------------------------------------------------------- +* p80211pb_ether_to_80211 +* +* Uses the contents of the ether frame and the etherconv setting +* to build the elements of the 802.11 frame. +* +* We don't actually set +* up the frame header here. That's the MAC's job. We're only handling +* conversion of DIXII or 802.3+LLC frames to something that works +* with 802.11. +* +* Note -- 802.11 header is NOT part of the skb. Likewise, the 802.11 +* FCS is also not present and will need to be added elsewhere. +* +* Arguments: +* ethconv Conversion type to perform +* skb skbuff containing the ether frame +* p80211_hdr 802.11 header +* +* Returns: +* 0 on success, non-zero otherwise +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +int skb_ether_to_p80211( wlandevice_t *wlandev, UINT32 ethconv, struct sk_buff *skb, p80211_hdr_t *p80211_hdr, p80211_metawep_t *p80211_wep) +{ + + UINT16 fc; + UINT16 proto; + wlan_ethhdr_t e_hdr; + wlan_llc_t *e_llc; + wlan_snap_t *e_snap; + int foo; + + DBFENTER; + memcpy(&e_hdr, skb->data, sizeof(e_hdr)); + + if (skb->len <= 0) { + WLAN_LOG_DEBUG(1, "zero-length skb!\n"); + return 1; + } + + if ( ethconv == WLAN_ETHCONV_ENCAP ) { /* simplest case */ + WLAN_LOG_DEBUG(3, "ENCAP len: %d\n", skb->len); + /* here, we don't care what kind of ether frm. Just stick it */ + /* in the 80211 payload */ + /* which is to say, leave the skb alone. */ + } else { + /* step 1: classify ether frame, DIX or 802.3? */ + proto = ntohs(e_hdr.type); + if ( proto <= 1500 ) { + WLAN_LOG_DEBUG(3, "802.3 len: %d\n", skb->len); + /* codes <= 1500 reserved for 802.3 lengths */ + /* it's 802.3, pass ether payload unchanged, */ + + /* trim off ethernet header */ + skb_pull(skb, WLAN_ETHHDR_LEN); + + /* leave off any PAD octets. */ + skb_trim(skb, proto); + } else { + WLAN_LOG_DEBUG(3, "DIXII len: %d\n", skb->len); + /* it's DIXII, time for some conversion */ + + /* trim off ethernet header */ + skb_pull(skb, WLAN_ETHHDR_LEN); + + /* tack on SNAP */ + e_snap = (wlan_snap_t *) skb_push(skb, sizeof(wlan_snap_t)); + e_snap->type = htons(proto); + if ( ethconv == WLAN_ETHCONV_8021h && p80211_stt_findproto(proto) ) { + memcpy( e_snap->oui, oui_8021h, WLAN_IEEE_OUI_LEN); + } else { + memcpy( e_snap->oui, oui_rfc1042, WLAN_IEEE_OUI_LEN); + } + + /* tack on llc */ + e_llc = (wlan_llc_t *) skb_push(skb, sizeof(wlan_llc_t)); + e_llc->dsap = 0xAA; /* SNAP, see IEEE 802 */ + e_llc->ssap = 0xAA; + e_llc->ctl = 0x03; + + } + } + + /* Set up the 802.11 header */ + /* It's a data frame */ + fc = host2ieee16( WLAN_SET_FC_FTYPE(WLAN_FTYPE_DATA) | + WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_DATAONLY)); + + switch ( wlandev->macmode ) { + case WLAN_MACMODE_IBSS_STA: + memcpy(p80211_hdr->a3.a1, &e_hdr.daddr, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a2, wlandev->netdev->dev_addr, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a3, wlandev->bssid, WLAN_ADDR_LEN); + break; + case WLAN_MACMODE_ESS_STA: + fc |= host2ieee16(WLAN_SET_FC_TODS(1)); + memcpy(p80211_hdr->a3.a1, wlandev->bssid, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a2, wlandev->netdev->dev_addr, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a3, &e_hdr.daddr, WLAN_ADDR_LEN); + break; + case WLAN_MACMODE_ESS_AP: + fc |= host2ieee16(WLAN_SET_FC_FROMDS(1)); + memcpy(p80211_hdr->a3.a1, &e_hdr.daddr, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a2, wlandev->bssid, WLAN_ADDR_LEN); + memcpy(p80211_hdr->a3.a3, &e_hdr.saddr, WLAN_ADDR_LEN); + break; + default: + WLAN_LOG_ERROR("Error: Converting eth to wlan in unknown mode.\n"); + return 1; + break; + } + + p80211_wep->data = NULL; + + if ((wlandev->hostwep & HOSTWEP_PRIVACYINVOKED) && (wlandev->hostwep & HOSTWEP_ENCRYPT)) { + // XXXX need to pick keynum other than default? + +#if 1 + p80211_wep->data = kmalloc(skb->len, GFP_ATOMIC); +#else + p80211_wep->data = skb->data; +#endif + + if ((foo = wep_encrypt(wlandev, skb->data, p80211_wep->data, + skb->len, + (wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK), + p80211_wep->iv, p80211_wep->icv))) { + WLAN_LOG_WARNING("Host en-WEP failed, dropping frame (%d).\n", foo); + return 2; + } + fc |= host2ieee16(WLAN_SET_FC_ISWEP(1)); + } + + + // skb->nh.raw = skb->data; + + p80211_hdr->a3.fc = fc; + p80211_hdr->a3.dur = 0; + p80211_hdr->a3.seq = 0; + + DBFEXIT; + return 0; +} + +/* jkriegl: from orinoco, modified */ +static void orinoco_spy_gather(wlandevice_t *wlandev, char *mac, + p80211_rxmeta_t *rxmeta) +{ + int i; + + /* Gather wireless spy statistics: for each packet, compare the + * source address with out list, and if match, get the stats... */ + + for (i = 0; i < wlandev->spy_number; i++) { + + if (!memcmp(wlandev->spy_address[i], mac, ETH_ALEN)) { + memcpy(wlandev->spy_address[i], mac, ETH_ALEN); + wlandev->spy_stat[i].level = rxmeta->signal; + wlandev->spy_stat[i].noise = rxmeta->noise; + wlandev->spy_stat[i].qual = (rxmeta->signal > rxmeta->noise) ? \ + (rxmeta->signal - rxmeta->noise) : 0; + wlandev->spy_stat[i].updated = 0x7; + } + } +} + +/*---------------------------------------------------------------- +* p80211pb_80211_to_ether +* +* Uses the contents of a received 802.11 frame and the etherconv +* setting to build an ether frame. +* +* This function extracts the src and dest address from the 802.11 +* frame to use in the construction of the eth frame. +* +* Arguments: +* ethconv Conversion type to perform +* skb Packet buffer containing the 802.11 frame +* +* Returns: +* 0 on success, non-zero otherwise +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +int skb_p80211_to_ether( wlandevice_t *wlandev, UINT32 ethconv, struct sk_buff *skb) +{ + netdevice_t *netdev = wlandev->netdev; + UINT16 fc; + UINT payload_length; + UINT payload_offset; + UINT8 daddr[WLAN_ETHADDR_LEN]; + UINT8 saddr[WLAN_ETHADDR_LEN]; + p80211_hdr_t *w_hdr; + wlan_ethhdr_t *e_hdr; + wlan_llc_t *e_llc; + wlan_snap_t *e_snap; + + int foo; + + DBFENTER; + + payload_length = skb->len - WLAN_HDR_A3_LEN - WLAN_CRC_LEN; + payload_offset = WLAN_HDR_A3_LEN; + + w_hdr = (p80211_hdr_t *) skb->data; + + /* setup some vars for convenience */ + fc = ieee2host16(w_hdr->a3.fc); + if ( (WLAN_GET_FC_TODS(fc) == 0) && (WLAN_GET_FC_FROMDS(fc) == 0) ) { + memcpy(daddr, w_hdr->a3.a1, WLAN_ETHADDR_LEN); + memcpy(saddr, w_hdr->a3.a2, WLAN_ETHADDR_LEN); + } else if( (WLAN_GET_FC_TODS(fc) == 0) && (WLAN_GET_FC_FROMDS(fc) == 1) ) { + memcpy(daddr, w_hdr->a3.a1, WLAN_ETHADDR_LEN); + memcpy(saddr, w_hdr->a3.a3, WLAN_ETHADDR_LEN); + } else if( (WLAN_GET_FC_TODS(fc) == 1) && (WLAN_GET_FC_FROMDS(fc) == 0) ) { + memcpy(daddr, w_hdr->a3.a3, WLAN_ETHADDR_LEN); + memcpy(saddr, w_hdr->a3.a2, WLAN_ETHADDR_LEN); + } else { + payload_offset = WLAN_HDR_A4_LEN; + payload_length -= ( WLAN_HDR_A4_LEN - WLAN_HDR_A3_LEN ); + if (payload_length < 0 ) { + WLAN_LOG_ERROR("A4 frame too short!\n"); + return 1; + } + memcpy(daddr, w_hdr->a4.a3, WLAN_ETHADDR_LEN); + memcpy(saddr, w_hdr->a4.a4, WLAN_ETHADDR_LEN); + } + + /* perform de-wep if necessary.. */ + if ((wlandev->hostwep & HOSTWEP_PRIVACYINVOKED) && WLAN_GET_FC_ISWEP(fc) && (wlandev->hostwep & HOSTWEP_DECRYPT)) { + if (payload_length <= 8) { + WLAN_LOG_ERROR("WEP frame too short (%u).\n", + skb->len); + return 1; + } + if ((foo = wep_decrypt(wlandev, skb->data + payload_offset + 4, + payload_length - 8, -1, + skb->data + payload_offset, + skb->data + payload_offset + payload_length - 4))) { + /* de-wep failed, drop skb. */ + WLAN_LOG_DEBUG(1, "Host de-WEP failed, dropping frame (%d).\n", foo); + wlandev->rx.decrypt_err++; + return 2; + } + + /* subtract the IV+ICV length off the payload */ + payload_length -= 8; + /* chop off the IV */ + skb_pull(skb, 4); + /* chop off the ICV. */ + skb_trim(skb, skb->len - 4); + + wlandev->rx.decrypt++; + } + + e_hdr = (wlan_ethhdr_t *) (skb->data + payload_offset); + + e_llc = (wlan_llc_t *) (skb->data + payload_offset); + e_snap = (wlan_snap_t *) (skb->data + payload_offset + sizeof(wlan_llc_t)); + + /* Test for the various encodings */ + if ( (payload_length >= sizeof(wlan_ethhdr_t)) && + ( e_llc->dsap != 0xaa || e_llc->ssap != 0xaa ) && + ((memcmp(daddr, e_hdr->daddr, WLAN_ETHADDR_LEN) == 0) || + (memcmp(saddr, e_hdr->saddr, WLAN_ETHADDR_LEN) == 0))) { + WLAN_LOG_DEBUG(3, "802.3 ENCAP len: %d\n", payload_length); + /* 802.3 Encapsulated */ + /* Test for an overlength frame */ + if ( payload_length > (netdev->mtu + WLAN_ETHHDR_LEN)) { + /* A bogus length ethfrm has been encap'd. */ + /* Is someone trying an oflow attack? */ + WLAN_LOG_ERROR("ENCAP frame too large (%d > %d)\n", + payload_length, netdev->mtu + WLAN_ETHHDR_LEN); + return 1; + } + + /* Chop off the 802.11 header. it's already sane. */ + skb_pull(skb, payload_offset); + /* chop off the 802.11 CRC */ + skb_trim(skb, skb->len - WLAN_CRC_LEN); + + } else if ((payload_length >= sizeof(wlan_llc_t) + sizeof(wlan_snap_t)) && + (e_llc->dsap == 0xaa) && + (e_llc->ssap == 0xaa) && + (e_llc->ctl == 0x03) && + (((memcmp( e_snap->oui, oui_rfc1042, WLAN_IEEE_OUI_LEN)==0) && + (ethconv == WLAN_ETHCONV_8021h) && + (p80211_stt_findproto(ieee2host16(e_snap->type)))) || + (memcmp( e_snap->oui, oui_rfc1042, WLAN_IEEE_OUI_LEN)!=0))) + { + WLAN_LOG_DEBUG(3, "SNAP+RFC1042 len: %d\n", payload_length); + /* it's a SNAP + RFC1042 frame && protocol is in STT */ + /* build 802.3 + RFC1042 */ + + /* Test for an overlength frame */ + if ( payload_length > netdev->mtu ) { + /* A bogus length ethfrm has been sent. */ + /* Is someone trying an oflow attack? */ + WLAN_LOG_ERROR("SNAP frame too large (%d > %d)\n", + payload_length, netdev->mtu); + return 1; + } + + /* chop 802.11 header from skb. */ + skb_pull(skb, payload_offset); + + /* create 802.3 header at beginning of skb. */ + e_hdr = (wlan_ethhdr_t *) skb_push(skb, WLAN_ETHHDR_LEN); + memcpy(e_hdr->daddr, daddr, WLAN_ETHADDR_LEN); + memcpy(e_hdr->saddr, saddr, WLAN_ETHADDR_LEN); + e_hdr->type = htons(payload_length); + + /* chop off the 802.11 CRC */ + skb_trim(skb, skb->len - WLAN_CRC_LEN); + + } else if ((payload_length >= sizeof(wlan_llc_t) + sizeof(wlan_snap_t)) && + (e_llc->dsap == 0xaa) && + (e_llc->ssap == 0xaa) && + (e_llc->ctl == 0x03) ) { + WLAN_LOG_DEBUG(3, "802.1h/RFC1042 len: %d\n", payload_length); + /* it's an 802.1h frame || (an RFC1042 && protocol is not in STT) */ + /* build a DIXII + RFC894 */ + + /* Test for an overlength frame */ + if ((payload_length - sizeof(wlan_llc_t) - sizeof(wlan_snap_t)) + > netdev->mtu) { + /* A bogus length ethfrm has been sent. */ + /* Is someone trying an oflow attack? */ + WLAN_LOG_ERROR("DIXII frame too large (%ld > %d)\n", + (long int) (payload_length - sizeof(wlan_llc_t) - + sizeof(wlan_snap_t)), + netdev->mtu); + return 1; + } + + /* chop 802.11 header from skb. */ + skb_pull(skb, payload_offset); + + /* chop llc header from skb. */ + skb_pull(skb, sizeof(wlan_llc_t)); + + /* chop snap header from skb. */ + skb_pull(skb, sizeof(wlan_snap_t)); + + /* create 802.3 header at beginning of skb. */ + e_hdr = (wlan_ethhdr_t *) skb_push(skb, WLAN_ETHHDR_LEN); + e_hdr->type = e_snap->type; + memcpy(e_hdr->daddr, daddr, WLAN_ETHADDR_LEN); + memcpy(e_hdr->saddr, saddr, WLAN_ETHADDR_LEN); + + /* chop off the 802.11 CRC */ + skb_trim(skb, skb->len - WLAN_CRC_LEN); + } else { + WLAN_LOG_DEBUG(3, "NON-ENCAP len: %d\n", payload_length); + /* any NON-ENCAP */ + /* it's a generic 80211+LLC or IPX 'Raw 802.3' */ + /* build an 802.3 frame */ + /* allocate space and setup hostbuf */ + + /* Test for an overlength frame */ + if ( payload_length > netdev->mtu ) { + /* A bogus length ethfrm has been sent. */ + /* Is someone trying an oflow attack? */ + WLAN_LOG_ERROR("OTHER frame too large (%d > %d)\n", + payload_length, + netdev->mtu); + return 1; + } + + /* Chop off the 802.11 header. */ + skb_pull(skb, payload_offset); + + /* create 802.3 header at beginning of skb. */ + e_hdr = (wlan_ethhdr_t *) skb_push(skb, WLAN_ETHHDR_LEN); + memcpy(e_hdr->daddr, daddr, WLAN_ETHADDR_LEN); + memcpy(e_hdr->saddr, saddr, WLAN_ETHADDR_LEN); + e_hdr->type = htons(payload_length); + + /* chop off the 802.11 CRC */ + skb_trim(skb, skb->len - WLAN_CRC_LEN); + + } + + skb->protocol = eth_type_trans(skb, netdev); + skb_reset_mac_header(skb); + + /* jkriegl: process signal and noise as set in hfa384x_int_rx() */ + /* jkriegl: only process signal/noise if requested by iwspy */ + if (wlandev->spy_number) + orinoco_spy_gather(wlandev, eth_hdr(skb)->h_source, P80211SKB_RXMETA(skb)); + + /* Free the metadata */ + p80211skb_rxmeta_detach(skb); + + DBFEXIT; + return 0; +} + +/*---------------------------------------------------------------- +* p80211_stt_findproto +* +* Searches the 802.1h Selective Translation Table for a given +* protocol. +* +* Arguments: +* proto protocl number (in host order) to search for. +* +* Returns: +* 1 - if the table is empty or a match is found. +* 0 - if the table is non-empty and a match is not found. +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +int p80211_stt_findproto(UINT16 proto) +{ + /* Always return found for now. This is the behavior used by the */ + /* Zoom Win95 driver when 802.1h mode is selected */ + /* TODO: If necessary, add an actual search we'll probably + need this to match the CMAC's way of doing things. + Need to do some testing to confirm. + */ + + if (proto == 0x80f3) /* APPLETALK */ + return 1; + + return 0; +} + +/*---------------------------------------------------------------- +* p80211skb_rxmeta_detach +* +* Disconnects the frmmeta and rxmeta from an skb. +* +* Arguments: +* wlandev The wlandev this skb belongs to. +* skb The skb we're attaching to. +* +* Returns: +* 0 on success, non-zero otherwise +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +void +p80211skb_rxmeta_detach(struct sk_buff *skb) +{ + p80211_rxmeta_t *rxmeta; + p80211_frmmeta_t *frmmeta; + + DBFENTER; + /* Sanity checks */ + if ( skb==NULL ) { /* bad skb */ + WLAN_LOG_DEBUG(1, "Called w/ null skb.\n"); + goto exit; + } + frmmeta = P80211SKB_FRMMETA(skb); + if ( frmmeta == NULL ) { /* no magic */ + WLAN_LOG_DEBUG(1, "Called w/ bad frmmeta magic.\n"); + goto exit; + } + rxmeta = frmmeta->rx; + if ( rxmeta == NULL ) { /* bad meta ptr */ + WLAN_LOG_DEBUG(1, "Called w/ bad rxmeta ptr.\n"); + goto exit; + } + + /* Free rxmeta */ + kfree(rxmeta); + + /* Clear skb->cb */ + memset(skb->cb, 0, sizeof(skb->cb)); +exit: + DBFEXIT; + return; +} + +/*---------------------------------------------------------------- +* p80211skb_rxmeta_attach +* +* Allocates a p80211rxmeta structure, initializes it, and attaches +* it to an skb. +* +* Arguments: +* wlandev The wlandev this skb belongs to. +* skb The skb we're attaching to. +* +* Returns: +* 0 on success, non-zero otherwise +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +int +p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb) +{ + int result = 0; + p80211_rxmeta_t *rxmeta; + p80211_frmmeta_t *frmmeta; + + DBFENTER; + + /* If these already have metadata, we error out! */ + if (P80211SKB_RXMETA(skb) != NULL) { + WLAN_LOG_ERROR("%s: RXmeta already attached!\n", + wlandev->name); + result = 0; + goto exit; + } + + /* Allocate the rxmeta */ + rxmeta = kmalloc(sizeof(p80211_rxmeta_t), GFP_ATOMIC); + + if ( rxmeta == NULL ) { + WLAN_LOG_ERROR("%s: Failed to allocate rxmeta.\n", + wlandev->name); + result = 1; + goto exit; + } + + /* Initialize the rxmeta */ + memset(rxmeta, 0, sizeof(p80211_rxmeta_t)); + rxmeta->wlandev = wlandev; + rxmeta->hosttime = jiffies; + + /* Overlay a frmmeta_t onto skb->cb */ + memset(skb->cb, 0, sizeof(p80211_frmmeta_t)); + frmmeta = (p80211_frmmeta_t*)(skb->cb); + frmmeta->magic = P80211_FRMMETA_MAGIC; + frmmeta->rx = rxmeta; +exit: + DBFEXIT; + return result; +} + +/*---------------------------------------------------------------- +* p80211skb_free +* +* Frees an entire p80211skb by checking and freeing the meta struct +* and then freeing the skb. +* +* Arguments: +* wlandev The wlandev this skb belongs to. +* skb The skb we're attaching to. +* +* Returns: +* 0 on success, non-zero otherwise +* +* Call context: +* May be called in interrupt or non-interrupt context +----------------------------------------------------------------*/ +void +p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb) +{ + p80211_frmmeta_t *meta; + DBFENTER; + meta = P80211SKB_FRMMETA(skb); + if ( meta && meta->rx) { + p80211skb_rxmeta_detach(skb); + } else { + WLAN_LOG_ERROR("Freeing an skb (%p) w/ no frmmeta.\n", skb); + } + + dev_kfree_skb(skb); + DBFEXIT; + return; +} -- cgit v1.2.3