summaryrefslogtreecommitdiff
path: root/net/wireless/util.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 13:25:22 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 13:25:22 +0200
commit8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22 (patch)
treea0a63398a9983667d52cbbbf4e2405b4f22b1d83 /net/wireless/util.c
parent1be025d3cb40cd295123af2c394f7229ef9b30ca (diff)
parent8b3408f8ee994973869d8ba32c5bf482bc4ddca4 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1745 commits) dp83640: free packet queues on remove dp83640: use proper function to free transmit time stamping packets ipv6: Do not use routes from locally generated RAs |PATCH net-next] tg3: add tx_dropped counter be2net: don't create multiple RX/TX rings in multi channel mode be2net: don't create multiple TXQs in BE2 be2net: refactor VF setup/teardown code into be_vf_setup/clear() be2net: add vlan/rx-mode/flow-control config to be_setup() net_sched: cls_flow: use skb_header_pointer() ipv4: avoid useless call of the function check_peer_pmtu TCP: remove TCP_DEBUG net: Fix driver name for mdio-gpio.c ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT rtnetlink: Add missing manual netlink notification in dev_change_net_namespaces ipv4: fix ipsec forward performance regression jme: fix irq storm after suspend/resume route: fix ICMP redirect validation net: hold sock reference while processing tx timestamps tcp: md5: add more const attributes Add ethtool -g support to virtio_net ... Fix up conflicts in: - drivers/net/Kconfig: The split-up generated a trivial conflict with removal of a stale reference to Documentation/networking/net-modules.txt. Remove it from the new location instead. - fs/sysfs/dir.c: Fairly nasty conflicts with the sysfs rb-tree usage, conflicting with Eric Biederman's changes for tagged directories.
Diffstat (limited to 'net/wireless/util.c')
-rw-r--r--net/wireless/util.c194
1 files changed, 183 insertions, 11 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index be75a3a0424e..2f178f73943f 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -6,6 +6,7 @@
#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
+#include <linux/crc32.h>
#include <net/cfg80211.h>
#include <net/ip.h>
#include "core.h"
@@ -150,12 +151,19 @@ void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
set_mandatory_flags_band(wiphy->bands[band], band);
}
+bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
+{
+ int i;
+ for (i = 0; i < wiphy->n_cipher_suites; i++)
+ if (cipher == wiphy->cipher_suites[i])
+ return true;
+ return false;
+}
+
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
struct key_params *params, int key_idx,
bool pairwise, const u8 *mac_addr)
{
- int i;
-
if (key_idx > 5)
return -EINVAL;
@@ -225,10 +233,7 @@ int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
}
}
- for (i = 0; i < rdev->wiphy.n_cipher_suites; i++)
- if (params->cipher == rdev->wiphy.cipher_suites[i])
- break;
- if (i == rdev->wiphy.n_cipher_suites)
+ if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
return -EINVAL;
return 0;
@@ -391,8 +396,9 @@ int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
}
break;
case cpu_to_le16(0):
- if (iftype != NL80211_IFTYPE_ADHOC)
- return -1;
+ if (iftype != NL80211_IFTYPE_ADHOC &&
+ iftype != NL80211_IFTYPE_STATION)
+ return -1;
break;
}
@@ -512,10 +518,9 @@ int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
if (head_need)
skb_orphan(skb);
- if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) {
- pr_err("failed to reallocate Tx buffer\n");
+ if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
return -ENOMEM;
- }
+
skb->truesize += head_need;
}
@@ -1044,3 +1049,170 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
return 0;
}
+
+u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
+ struct ieee802_11_elems *elems,
+ u64 filter, u32 crc)
+{
+ size_t left = len;
+ u8 *pos = start;
+ bool calc_crc = filter != 0;
+
+ memset(elems, 0, sizeof(*elems));
+ elems->ie_start = start;
+ elems->total_len = len;
+
+ while (left >= 2) {
+ u8 id, elen;
+
+ id = *pos++;
+ elen = *pos++;
+ left -= 2;
+
+ if (elen > left)
+ break;
+
+ if (calc_crc && id < 64 && (filter & (1ULL << id)))
+ crc = crc32_be(crc, pos - 2, elen + 2);
+
+ switch (id) {
+ case WLAN_EID_SSID:
+ elems->ssid = pos;
+ elems->ssid_len = elen;
+ break;
+ case WLAN_EID_SUPP_RATES:
+ elems->supp_rates = pos;
+ elems->supp_rates_len = elen;
+ break;
+ case WLAN_EID_FH_PARAMS:
+ elems->fh_params = pos;
+ elems->fh_params_len = elen;
+ break;
+ case WLAN_EID_DS_PARAMS:
+ elems->ds_params = pos;
+ elems->ds_params_len = elen;
+ break;
+ case WLAN_EID_CF_PARAMS:
+ elems->cf_params = pos;
+ elems->cf_params_len = elen;
+ break;
+ case WLAN_EID_TIM:
+ if (elen >= sizeof(struct ieee80211_tim_ie)) {
+ elems->tim = (void *)pos;
+ elems->tim_len = elen;
+ }
+ break;
+ case WLAN_EID_IBSS_PARAMS:
+ elems->ibss_params = pos;
+ elems->ibss_params_len = elen;
+ break;
+ case WLAN_EID_CHALLENGE:
+ elems->challenge = pos;
+ elems->challenge_len = elen;
+ break;
+ case WLAN_EID_VENDOR_SPECIFIC:
+ if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
+ pos[2] == 0xf2) {
+ /* Microsoft OUI (00:50:F2) */
+
+ if (calc_crc)
+ crc = crc32_be(crc, pos - 2, elen + 2);
+
+ if (pos[3] == 1) {
+ /* OUI Type 1 - WPA IE */
+ elems->wpa = pos;
+ elems->wpa_len = elen;
+ } else if (elen >= 5 && pos[3] == 2) {
+ /* OUI Type 2 - WMM IE */
+ if (pos[4] == 0) {
+ elems->wmm_info = pos;
+ elems->wmm_info_len = elen;
+ } else if (pos[4] == 1) {
+ elems->wmm_param = pos;
+ elems->wmm_param_len = elen;
+ }
+ }
+ }
+ break;
+ case WLAN_EID_RSN:
+ elems->rsn = pos;
+ elems->rsn_len = elen;
+ break;
+ case WLAN_EID_ERP_INFO:
+ elems->erp_info = pos;
+ elems->erp_info_len = elen;
+ break;
+ case WLAN_EID_EXT_SUPP_RATES:
+ elems->ext_supp_rates = pos;
+ elems->ext_supp_rates_len = elen;
+ break;
+ case WLAN_EID_HT_CAPABILITY:
+ if (elen >= sizeof(struct ieee80211_ht_cap))
+ elems->ht_cap_elem = (void *)pos;
+ break;
+ case WLAN_EID_HT_INFORMATION:
+ if (elen >= sizeof(struct ieee80211_ht_info))
+ elems->ht_info_elem = (void *)pos;
+ break;
+ case WLAN_EID_MESH_ID:
+ elems->mesh_id = pos;
+ elems->mesh_id_len = elen;
+ break;
+ case WLAN_EID_MESH_CONFIG:
+ if (elen >= sizeof(struct ieee80211_meshconf_ie))
+ elems->mesh_config = (void *)pos;
+ break;
+ case WLAN_EID_PEER_MGMT:
+ elems->peering = pos;
+ elems->peering_len = elen;
+ break;
+ case WLAN_EID_PREQ:
+ elems->preq = pos;
+ elems->preq_len = elen;
+ break;
+ case WLAN_EID_PREP:
+ elems->prep = pos;
+ elems->prep_len = elen;
+ break;
+ case WLAN_EID_PERR:
+ elems->perr = pos;
+ elems->perr_len = elen;
+ break;
+ case WLAN_EID_RANN:
+ if (elen >= sizeof(struct ieee80211_rann_ie))
+ elems->rann = (void *)pos;
+ break;
+ case WLAN_EID_CHANNEL_SWITCH:
+ elems->ch_switch_elem = pos;
+ elems->ch_switch_elem_len = elen;
+ break;
+ case WLAN_EID_QUIET:
+ if (!elems->quiet_elem) {
+ elems->quiet_elem = pos;
+ elems->quiet_elem_len = elen;
+ }
+ elems->num_of_quiet_elem++;
+ break;
+ case WLAN_EID_COUNTRY:
+ elems->country_elem = pos;
+ elems->country_elem_len = elen;
+ break;
+ case WLAN_EID_PWR_CONSTRAINT:
+ elems->pwr_constr_elem = pos;
+ elems->pwr_constr_elem_len = elen;
+ break;
+ case WLAN_EID_TIMEOUT_INTERVAL:
+ elems->timeout_int = pos;
+ elems->timeout_int_len = elen;
+ break;
+ default:
+ break;
+ }
+
+ left -= elen;
+ pos += elen;
+ }
+
+ return crc;
+}
+EXPORT_SYMBOL(ieee802_11_parse_elems_crc);