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wiphy: Only support UTF-8 SSIDs

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We will ignore non-UTF8 based SSIDs.  Support for non-UTF8 SSIDs seems
to be of dubious value in the real world as the vast majority of
consumer devices would not even allow such SSIDs to be configured or
used.

There also seems to be no compelling argument to support such SSIDs, so
until that argument arrives, non-UTF8 SSIDs will be filtered out.  This
makes the D-Bus API and implementation much easier.
This commit is contained in:
Denis Kenzior 2015-04-08 13:29:03 -05:00
parent 3877a4e5dd
commit 6921e239a4
1 changed files with 18 additions and 16 deletions
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34
src/wiphy.c
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@ -54,8 +54,7 @@ static int scheduled_scan_interval = 60; /* in secs */
struct network {
char *object_path;
struct netdev *netdev;
uint8_t ssid[32];
uint8_t ssid_len;
char ssid[33];
unsigned char *psk;
unsigned int agent_request;
enum scan_ssid_security ssid_security;
@ -172,8 +171,7 @@ static bool __iwd_network_append_properties(const struct network *network,
{
l_dbus_message_builder_enter_array(builder, "{sv}");
dbus_dict_append_bytearray(builder, "SSID", network->ssid,
network->ssid_len);
dbus_dict_append_string(builder, "Name", network->ssid);
l_dbus_message_builder_leave_array(builder);
@ -219,7 +217,7 @@ static int mlme_authenticate_cmd(struct network *network)
msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
msg_append_attr(msg, NL80211_ATTR_WIPHY_FREQ, 4, &bss->frequency);
msg_append_attr(msg, NL80211_ATTR_MAC, ETH_ALEN, bss->addr);
msg_append_attr(msg, NL80211_ATTR_SSID, network->ssid_len,
msg_append_attr(msg, NL80211_ATTR_SSID, strlen(network->ssid),
network->ssid);
msg_append_attr(msg, NL80211_ATTR_AUTH_TYPE, 4, &auth_type);
l_genl_family_send(nl80211, msg, genl_connect_cb, netdev, NULL);
@ -248,8 +246,9 @@ static void passphrase_callback(enum agent_result result,
network->psk = l_malloc(32);
if (crypto_psk_from_passphrase(passphrase, network->ssid,
network->ssid_len, network->psk) < 0) {
if (crypto_psk_from_passphrase(passphrase, (uint8_t *) network->ssid,
strlen(network->ssid),
network->psk) < 0) {
l_error("PMK generation failed. "
"Ensure Crypto Engine is properly configured");
dbus_pending_reply(&netdev->connect_pending,
@ -1097,7 +1096,7 @@ static void mlme_associate_cmd(struct netdev *netdev)
msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
msg_append_attr(msg, NL80211_ATTR_WIPHY_FREQ, 4, &bss->frequency);
msg_append_attr(msg, NL80211_ATTR_MAC, ETH_ALEN, bss->addr);
msg_append_attr(msg, NL80211_ATTR_SSID, network->ssid_len,
msg_append_attr(msg, NL80211_ATTR_SSID, strlen(network->ssid),
network->ssid);
if (network->ssid_security == SCAN_SSID_SECURITY_PSK) {
@ -1332,6 +1331,12 @@ static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
goto fail;
}
if (!util_ssid_is_utf8(ssid_len, ssid)) {
l_warn("Ignoring Network with non-UTF8 SSID '%s'",
util_ssid_to_utf8(ssid_len, ssid));
goto fail;
}
/*
* TODO: Check whether WPA element is present
*
@ -1371,20 +1376,18 @@ static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
network = l_hashmap_lookup(netdev->networks, path);
if (!network) {
l_debug("Found new SSID \"%s\" security %s",
util_ssid_to_utf8(ssid_len, ssid),
ssid_security_to_str(ssid_security));
network = l_new(struct network, 1);
network->netdev = netdev;
memcpy(network->ssid, ssid, ssid_len);
network->ssid_len = ssid_len;
network->ssid_security = ssid_security;
network->bss_list = l_queue_new();
network->object_path = strdup(path);
l_hashmap_insert(netdev->networks,
network->object_path, network);
l_debug("Found new SSID \"%s\" security %s", network->ssid,
ssid_security_to_str(ssid_security));
if (!l_dbus_register_interface(dbus_get_bus(),
network->object_path,
IWD_NETWORK_INTERFACE,
@ -1487,7 +1490,7 @@ static void network_remove_if_lost(void *data)
return;
l_debug("No remaining BSSs for SSID: %s -- Removing network",
util_ssid_to_utf8(network->ssid_len, network->ssid));
network->ssid);
if (!l_hashmap_remove(network->netdev->networks, network->object_path))
l_warn("Panic, trying to remove network that doesn't"
@ -1515,8 +1518,7 @@ static void get_scan_done(void *user)
struct network *network = old_bss->network;
l_debug("Lost BSS '%s' with SSID: %s",
bss_address_to_string(old_bss),
util_ssid_to_utf8(network->ssid_len, network->ssid));
bss_address_to_string(old_bss), network->ssid);
l_queue_remove(lost_networks, network);
l_queue_push_head(lost_networks, network);