package/hostapd/patches/470-wpa_ie_cap_workaround.patch

   1 --- a/src/common/wpa_common.c
   2 +++ b/src/common/wpa_common.c
   3 @@ -953,6 +953,31 @@ const char * wpa_key_mgmt_txt(int key_mg
   4  }
   5
   6
   7 +static void wpa_fixup_wpa_ie_rsn(u8 *assoc_ie, const u8 *wpa_msg_ie,
   8 +                                size_t rsn_ie_len)
   9 +{
  10 +       int pos, count;
  11 +
  12 +       pos = sizeof(struct rsn_ie_hdr) + RSN_SELECTOR_LEN;
  13 +       if (rsn_ie_len < pos + 2)
  14 +               return;
  15 +
  16 +       count = WPA_GET_LE16(wpa_msg_ie + pos);
  17 +       pos += 2 + count * RSN_SELECTOR_LEN;
  18 +       if (rsn_ie_len < pos + 2)
  19 +               return;
  20 +
  21 +       count = WPA_GET_LE16(wpa_msg_ie + pos);
  22 +       pos += 2 + count * RSN_SELECTOR_LEN;
  23 +       if (rsn_ie_len < pos + 2)
  24 +               return;
  25 +
  26 +       if (!assoc_ie[pos] && !assoc_ie[pos + 1] &&
  27 +           (wpa_msg_ie[pos] || wpa_msg_ie[pos + 1]))
  28 +               memcpy(&assoc_ie[pos], &wpa_msg_ie[pos], 2);
  29 +}
  30 +
  31 +
  32  int wpa_compare_rsn_ie(int ft_initial_assoc,
  33                        const u8 *ie1, size_t ie1len,
  34                        const u8 *ie2, size_t ie2len)
  35 @@ -960,8 +985,19 @@ int wpa_compare_rsn_ie(int ft_initial_as
  36         if (ie1 == NULL || ie2 == NULL)
  37                 return -1;
  38
  39 -       if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
  40 -               return 0; /* identical IEs */
  41 +       if (ie1len == ie2len) {
  42 +               u8 *ie_tmp;
  43 +
  44 +               if (os_memcmp(ie1, ie2, ie1len) == 0)
  45 +                       return 0; /* identical IEs */
  46 +
  47 +               ie_tmp = alloca(ie1len);
  48 +               memcpy(ie_tmp, ie1, ie1len);
  49 +               wpa_fixup_wpa_ie_rsn(ie_tmp, ie2, ie1len);
  50 +
  51 +               if (os_memcmp(ie_tmp, ie2, ie1len) == 0)
  52 +                       return 0; /* only mismatch in RSN capabilties */
  53 +       }
  54
  55  #ifdef CONFIG_IEEE80211R
  56         if (ft_initial_assoc) {