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netdev: Build RSN attributes in a common function 

Both CMD_ASSOCIATE and CMD_CONNECT paths were using very similar code to
build RSN specific attributes.  Use a common function to build these
attributes to cut down on duplicated code.

While here, also start using ie_rsn_cipher_suite_to_cipher instead of
assuming that the pairwise / group ciphers can only be CCMP or TKIP.
This commit is contained in:
Denis Kenzior 2022-10-20 12:17:21 -05:00
parent 59ace1b691
commit 7ab97db9a9
1 changed files with 54 additions and 87 deletions
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141
src/netdev.c
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@ -2519,6 +2519,44 @@ static unsigned int ie_rsn_akm_suite_to_nl80211(enum ie_rsn_akm_suite akm)
return 0;
}
static void netdev_append_nl80211_rsn_attributes(struct l_genl_msg *msg,
struct handshake_state *hs)
{
uint32_t nl_cipher;
uint32_t nl_akm;
uint32_t wpa_version;
nl_cipher = ie_rsn_cipher_suite_to_cipher(hs->pairwise_cipher);
L_WARN_ON(!nl_cipher);
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
4, &nl_cipher);
nl_cipher = ie_rsn_cipher_suite_to_cipher(hs->group_cipher);
L_WARN_ON(!nl_cipher);
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4, &nl_cipher);
if (hs->mfp) {
uint32_t use_mfp = NL80211_MFP_REQUIRED;
l_genl_msg_append_attr(msg, NL80211_ATTR_USE_MFP, 4, &use_mfp);
}
nl_akm = ie_rsn_akm_suite_to_nl80211(hs->akm_suite);
L_WARN_ON(!nl_akm);
l_genl_msg_append_attr(msg, NL80211_ATTR_AKM_SUITES, 4, &nl_akm);
if (IE_AKM_IS_SAE(hs->akm_suite))
wpa_version = NL80211_WPA_VERSION_3;
else if (hs->wpa_ie)
wpa_version = NL80211_WPA_VERSION_1;
else
wpa_version = NL80211_WPA_VERSION_2;
l_genl_msg_append_attr(msg, NL80211_ATTR_WPA_VERSIONS,
4, &wpa_version);
}
static struct l_genl_msg *netdev_build_cmd_connect(struct netdev *netdev,
struct handshake_state *hs,
const uint8_t *prev_bssid,
@ -2575,61 +2613,25 @@ static struct l_genl_msg *netdev_build_cmd_connect(struct netdev *netdev,
l_genl_msg_append_attr(msg, NL80211_ATTR_SOCKET_OWNER, 0, NULL);
if (is_rsn) {
uint32_t nl_cipher;
uint32_t nl_akm;
uint32_t wpa_version;
if (hs->pairwise_cipher == IE_RSN_CIPHER_SUITE_CCMP)
nl_cipher = CRYPTO_CIPHER_CCMP;
else
nl_cipher = CRYPTO_CIPHER_TKIP;
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
4, &nl_cipher);
if (hs->group_cipher == IE_RSN_CIPHER_SUITE_CCMP)
nl_cipher = CRYPTO_CIPHER_CCMP;
else
nl_cipher = CRYPTO_CIPHER_TKIP;
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4, &nl_cipher);
if (hs->mfp) {
uint32_t use_mfp = NL80211_MFP_REQUIRED;
l_genl_msg_append_attr(msg, NL80211_ATTR_USE_MFP,
4, &use_mfp);
}
nl_akm = ie_rsn_akm_suite_to_nl80211(hs->akm_suite);
if (nl_akm)
l_genl_msg_append_attr(msg, NL80211_ATTR_AKM_SUITES,
4, &nl_akm);
if (IE_AKM_IS_SAE(hs->akm_suite))
wpa_version = NL80211_WPA_VERSION_3;
else if (hs->wpa_ie)
wpa_version = NL80211_WPA_VERSION_1;
else
wpa_version = NL80211_WPA_VERSION_2;
l_genl_msg_append_attr(msg, NL80211_ATTR_WPA_VERSIONS,
4, &wpa_version);
l_genl_msg_append_attr(msg, NL80211_ATTR_CONTROL_PORT, 0, NULL);
netdev_append_nl80211_rsn_attributes(msg, hs);
c_iov = iov_ie_append(iov, n_iov, c_iov, hs->supplicant_ie);
}
if (is_rsn || hs->settings_8021x) {
l_genl_msg_append_attr(msg, NL80211_ATTR_CONTROL_PORT,
0, NULL);
if (netdev->pae_over_nl80211)
l_genl_msg_append_attr(msg,
NL80211_ATTR_CONTROL_PORT_OVER_NL80211,
0, NULL);
}
if (netdev->owe_sm) {
owe_build_dh_ie(netdev->owe_sm, owe_dh_ie, &dh_ie_len);
c_iov = iov_ie_append(iov, n_iov, c_iov, owe_dh_ie);
}
if (netdev->pae_over_nl80211)
l_genl_msg_append_attr(msg,
NL80211_ATTR_CONTROL_PORT_OVER_NL80211,
0, NULL);
c_iov = iov_ie_append(iov, n_iov, c_iov, hs->mde);
c_iov = netdev_populate_common_ies(netdev, hs, msg, iov, n_iov, c_iov);
@ -2953,52 +2955,17 @@ static struct l_genl_msg *netdev_build_cmd_associate_common(
l_genl_msg_append_attr(msg, NL80211_ATTR_SSID, hs->ssid_len, hs->ssid);
l_genl_msg_append_attr(msg, NL80211_ATTR_SOCKET_OWNER, 0, NULL);
if (is_rsn) {
uint32_t nl_cipher;
uint32_t nl_akm;
uint32_t wpa_version;
if (is_rsn)
netdev_append_nl80211_rsn_attributes(msg, hs);
l_genl_msg_append_attr(msg, NL80211_ATTR_CONTROL_PORT, 0, NULL);
if (is_rsn || hs->settings_8021x) {
l_genl_msg_append_attr(msg, NL80211_ATTR_CONTROL_PORT,
0, NULL);
if (netdev->pae_over_nl80211)
l_genl_msg_append_attr(msg,
NL80211_ATTR_CONTROL_PORT_OVER_NL80211,
0, NULL);
if (hs->pairwise_cipher == IE_RSN_CIPHER_SUITE_CCMP)
nl_cipher = CRYPTO_CIPHER_CCMP;
else
nl_cipher = CRYPTO_CIPHER_TKIP;
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
4, &nl_cipher);
if (hs->group_cipher == IE_RSN_CIPHER_SUITE_CCMP)
nl_cipher = CRYPTO_CIPHER_CCMP;
else
nl_cipher = CRYPTO_CIPHER_TKIP;
l_genl_msg_append_attr(msg, NL80211_ATTR_CIPHER_SUITE_GROUP,
4, &nl_cipher);
if (hs->mfp) {
uint32_t use_mfp = NL80211_MFP_REQUIRED;
l_genl_msg_append_attr(msg, NL80211_ATTR_USE_MFP,
4, &use_mfp);
}
nl_akm = ie_rsn_akm_suite_to_nl80211(hs->akm_suite);
if (nl_akm)
l_genl_msg_append_attr(msg, NL80211_ATTR_AKM_SUITES,
4, &nl_akm);
if (hs->wpa_ie)
wpa_version = NL80211_WPA_VERSION_1;
else
wpa_version = NL80211_WPA_VERSION_2;
l_genl_msg_append_attr(msg, NL80211_ATTR_WPA_VERSIONS,
4, &wpa_version);
}
return msg;