117 lines
2.8 KiB
Diff
117 lines
2.8 KiB
Diff
---
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hostapd/driver_devicescape.c | 96 ++++++++++++++++++++++++++++++++++---------
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1 file changed, 76 insertions(+), 20 deletions(-)
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--- hostap.orig/hostapd/driver_devicescape.c 2007-11-09 13:41:13.000000000 +0100
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+++ hostap/hostapd/driver_devicescape.c 2007-11-09 13:41:14.000000000 +0100
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@@ -228,33 +228,89 @@ static int i802_set_encryption(const cha
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return ret;
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}
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+static inline int min_int(int a, int b)
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+{
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+ if (a<b)
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+ return a;
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+ return b;
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+}
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+
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+static int get_key_handler(struct nl_msg *msg, void *arg)
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+{
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+ struct nlattr *tb[NL80211_ATTR_MAX];
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+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
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+
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+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
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+ genlmsg_attrlen(gnlh, 0), NULL);
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+
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+ /*
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+ * TODO: validate the key index and mac address!
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+ * Otherwise, there's a race condition as soon as
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+ * the kernel starts sending key notifications.
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+ */
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+
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+ if (tb[NL80211_ATTR_KEY_SEQ])
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+ memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
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+ min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
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+ return NL_SKIP;
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+}
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+
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+static int ack_wait_handler(struct nl_msg *msg, void *arg)
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+{
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+ int *finished = arg;
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+
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+ *finished = 1;
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+ return NL_STOP;
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+}
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static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
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int idx, u8 *seq)
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{
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struct i802_driver_data *drv = priv;
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- struct prism2_hostapd_param *param;
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- size_t param_len;
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- int ret;
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+ struct nl_msg *msg;
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+ struct nl_cb *cb = NULL;
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+ int ret = -1;
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+ int err = 0;
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+ int finished = 0;
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- param_len = sizeof(struct prism2_hostapd_param) + 32;
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- param = os_zalloc(param_len);
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- if (param == NULL)
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- return -1;
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+ msg = nlmsg_alloc();
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+ if (!msg)
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+ goto out;
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- param->cmd = PRISM2_GET_ENCRYPTION;
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- if (addr == NULL)
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- memset(param->sta_addr, 0xff, ETH_ALEN);
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- else
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- memcpy(param->sta_addr, addr, ETH_ALEN);
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- param->u.crypt.idx = idx;
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-
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- ret = hostapd_ioctl_iface(iface, drv, param, param_len);
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- if (ret == 0) {
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- memcpy(seq, param->u.crypt.seq_counter,
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- HOSTAP_SEQ_COUNTER_SIZE);
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- }
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- free(param);
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+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
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+ 0, NL80211_CMD_GET_KEY, 0);
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+
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+ if (addr)
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+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
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+ NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
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+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
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+
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+ cb = nl_cb_alloc(NL_CB_CUSTOM);
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+ if (!cb)
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+ goto out;
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+
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+ memset(seq, 0, 6);
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+
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+ if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
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+ goto out;
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+
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+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
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+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
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+
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+ err = nl_recvmsgs(drv->nl_handle, cb);
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+
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+ if (!finished)
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+ err = nl_wait_for_ack(drv->nl_handle);
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+
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+ if (err < 0)
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+ goto out;
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+
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+ ret = 0;
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+
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+ out:
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+ nl_cb_put(cb);
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+ nla_put_failure:
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+ nlmsg_free(msg);
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return ret;
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}
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