mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-12-26 01:02:35 +01:00
p2p: Retry connect on "Previous authentication not valid"
With some WFD devices we occasionally get a Disconnect before or during the DHCP setup on the first connection attempt to a newly formeg group, with the reason code MMPDU_REASON_CODE_PREV_AUTH_NOT_VALID. Retrying a a few times makes the connections consistently successful. Some conditions are simplified/update in this patch because conn_dhcp_timeout now implies conn_wsc_bss, and both imply conn_retry_count.
This commit is contained in:
Andrew Zaborowski
Denis Kenzior
parent
914a03c4bf
commit
650e7715b1
248
src/p2p.c
248
src/p2p.c
@ -97,6 +97,8 @@ struct p2p_device {
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struct netconfig *conn_netconfig;
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struct l_timeout *conn_dhcp_timeout;
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struct p2p_wfd_properties *conn_own_wfd;
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uint8_t conn_psk[32];
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int conn_retry_count;
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struct l_timeout *config_timeout;
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unsigned long go_config_delay;
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@ -206,8 +208,7 @@ static void p2p_discovery_user_free(void *data)
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static inline bool p2p_peer_operational(struct p2p_peer *peer)
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{
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return peer && peer->dev->conn_netdev && !peer->dev->conn_wsc_bss &&
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!peer->dev->conn_dhcp_timeout && !peer->wsc.pending_connect &&
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!peer->dev->disconnecting;
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!peer->wsc.pending_connect && !peer->dev->disconnecting;
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}
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static bool p2p_peer_match(const void *a, const void *b)
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@ -488,6 +489,9 @@ static void p2p_connection_reset(struct p2p_device *dev)
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p2p_own_wfd->available = true;
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}
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explicit_bzero(dev->conn_psk, 32);
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dev->conn_retry_count = 0;
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if (dev->enabled && !dev->start_stop_cmd_id &&
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!l_queue_isempty(dev->discovery_users))
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p2p_device_discovery_start(dev);
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@ -596,31 +600,40 @@ static const struct frame_xchg_prefix p2p_frame_pd_resp = {
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.len = 7,
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};
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static void p2p_peer_connect_done(struct p2p_device *dev)
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{
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struct p2p_peer *peer = dev->conn_peer;
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/* We can free anything potentially needed for a retry */
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scan_bss_free(dev->conn_wsc_bss);
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dev->conn_wsc_bss = NULL;
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explicit_bzero(dev->conn_psk, 32);
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dbus_pending_reply(&peer->wsc.pending_connect,
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l_dbus_message_new_method_return(
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peer->wsc.pending_connect));
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE, "Connected");
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE,
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"ConnectedInterface");
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE,
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"ConnectedIP");
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}
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static void p2p_netconfig_event_handler(enum netconfig_event event,
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void *user_data)
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{
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struct p2p_device *dev = user_data;
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struct p2p_peer *peer = dev->conn_peer;
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switch (event) {
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case NETCONFIG_EVENT_CONNECTED:
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l_timeout_remove(dev->conn_dhcp_timeout);
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dbus_pending_reply(&peer->wsc.pending_connect,
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l_dbus_message_new_method_return(
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peer->wsc.pending_connect));
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE, "Connected");
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE,
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"ConnectedInterface");
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l_dbus_property_changed(dbus_get_bus(),
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p2p_peer_get_path(dev->conn_peer),
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IWD_P2P_PEER_INTERFACE,
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"ConnectedIP");
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p2p_peer_connect_done(dev);
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break;
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default:
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l_error("station: Unsupported netconfig event: %d.", event);
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@ -654,10 +667,12 @@ static void p2p_start_dhcp(struct p2p_device *dev)
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&dhcp_timeout_val))
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dhcp_timeout_val = 10; /* 10s default */
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dev->conn_netconfig = netconfig_new(ifindex);
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if (!dev->conn_netconfig) {
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p2p_connect_failed(dev);
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return;
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dev->conn_netconfig = netconfig_new(ifindex);
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if (!dev->conn_netconfig) {
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p2p_connect_failed(dev);
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return;
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}
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}
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netconfig_configure(dev->conn_netconfig, p2p_dhcp_settings,
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@ -711,13 +726,35 @@ static void p2p_netdev_connect_cb(struct netdev *netdev,
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}
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}
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static void p2p_try_connect_group(struct p2p_device *dev);
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static void p2p_netdev_event(struct netdev *netdev, enum netdev_event event,
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void *event_data, void *user_data)
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{
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struct p2p_device *dev = user_data;
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const uint16_t *reason_code;
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switch (event) {
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case NETDEV_EVENT_DISCONNECT_BY_AP:
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reason_code = event_data;
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if (*reason_code == MMPDU_REASON_CODE_PREV_AUTH_NOT_VALID &&
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dev->conn_wsc_bss &&
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dev->conn_retry_count < 5) {
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/*
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* Sometimes a retry helps here, may be that we haven't
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* waited long enough for the GO setup.
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*/
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l_timeout_remove(dev->conn_dhcp_timeout);
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if (dev->conn_netconfig)
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netconfig_reset(dev->conn_netconfig);
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p2p_try_connect_group(dev);
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break;
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}
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/* Fall through. */
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case NETDEV_EVENT_DISCONNECT_BY_SME:
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/*
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* We may get a DISCONNECT_BY_SME as a result of a
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@ -770,72 +807,19 @@ static void p2p_handshake_event(struct handshake_state *hs,
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va_end(args);
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}
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static void p2p_peer_provision_done(int err, struct wsc_credentials_info *creds,
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unsigned int n_creds, void *user_data)
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static void p2p_try_connect_group(struct p2p_device *dev)
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{
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struct p2p_peer *peer = user_data;
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struct p2p_device *dev = peer->dev;
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struct scan_bss *bss = dev->conn_wsc_bss;
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struct handshake_state *hs = NULL;
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struct iovec ie_iov[16];
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int ie_num = 0;
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int r = -EOPNOTSUPP;
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int r;
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struct p2p_association_req info = {};
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struct ie_rsn_info bss_info = {};
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struct ie_rsn_info rsn_info = {};
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uint8_t rsne_buf[256];
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uint8_t wfd_ie[32];
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l_debug("err=%i n_creds=%u", err, n_creds);
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dev->conn_wsc_bss = NULL;
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dev->conn_enrollee = NULL;
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l_timeout_remove(dev->config_timeout);
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l_timeout_remove(dev->go_neg_req_timeout);
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if (err < 0) {
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if (err == -ECANCELED && peer->wsc.pending_cancel) {
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dbus_pending_reply(&peer->wsc.pending_cancel,
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l_dbus_message_new_method_return(
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peer->wsc.pending_cancel));
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p2p_connection_reset(dev);
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} else
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p2p_connect_failed(dev);
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goto done;
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}
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if (strlen(creds[0].ssid) != bss->ssid_len ||
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memcmp(creds[0].ssid, bss->ssid, bss->ssid_len)) {
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l_error("Unsupported: the SSID from the P2P peer's WSC "
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"credentials doesn't match the SSID from the "
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"Probe Response IEs");
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goto not_supported;
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}
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/*
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* Apparently some implementations send the intended client's address
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* here (i.e. our), and some send the target BSS's (their own).
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*/
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if (memcmp(creds[0].addr, netdev_get_address(dev->conn_netdev), 6) &&
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memcmp(creds[0].addr, bss->addr, 6)) {
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char addr1[32], addr2[32];
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l_strlcpy(addr1, util_address_to_string(creds[0].addr),
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sizeof(addr1));
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l_strlcpy(addr2, util_address_to_string(
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netdev_get_address(dev->conn_netdev)),
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sizeof(addr2));
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l_error("Error: WSC credentials are not for our client "
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"interface (%s vs. %s)", addr1, addr2);
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goto error;
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}
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if (!bss->rsne || creds[0].security != SECURITY_PSK)
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goto not_supported;
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info.capability = dev->capability;
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info.device_info = dev->device_info;
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@ -879,39 +863,100 @@ static void p2p_peer_provision_done(int err, struct wsc_credentials_info *creds,
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handshake_state_set_event_func(hs, p2p_handshake_event, dev);
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handshake_state_set_ssid(hs, bss->ssid, bss->ssid_len);
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if (creds[0].has_passphrase) {
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uint8_t psk[32];
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if (crypto_psk_from_passphrase(creds[0].passphrase, bss->ssid,
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bss->ssid_len, psk) < 0)
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goto error;
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handshake_state_set_pmk(hs, psk, 32);
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} else
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handshake_state_set_pmk(hs, creds[0].psk, 32);
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handshake_state_set_pmk(hs, dev->conn_psk, 32);
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r = netdev_connect(dev->conn_netdev, bss, hs, ie_iov, ie_num,
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p2p_netdev_event, p2p_netdev_connect_cb, dev);
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if (r == 0)
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goto done;
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if (r < 0) {
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l_error("netdev_connect error: %s (%i)", strerror(-r), -r);
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goto error;
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}
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l_error("netdev_connect error: %s (%i)", strerror(-err), -err);
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dev->conn_retry_count++;
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done:
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l_free(ie_iov[0].iov_base);
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return;
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error:
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not_supported:
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if (r < 0) {
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if (hs)
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handshake_state_free(hs);
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if (hs)
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handshake_state_free(hs);
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p2p_connect_failed(dev);
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p2p_connect_failed(dev);
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goto done;
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}
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static void p2p_peer_provision_done(int err, struct wsc_credentials_info *creds,
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unsigned int n_creds, void *user_data)
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{
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struct p2p_peer *peer = user_data;
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struct p2p_device *dev = peer->dev;
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struct scan_bss *bss = dev->conn_wsc_bss;
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l_debug("err=%i n_creds=%u", err, n_creds);
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dev->conn_enrollee = NULL;
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l_timeout_remove(dev->config_timeout);
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l_timeout_remove(dev->go_neg_req_timeout);
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if (err < 0) {
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if (err == -ECANCELED && peer->wsc.pending_cancel) {
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dbus_pending_reply(&peer->wsc.pending_cancel,
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l_dbus_message_new_method_return(
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peer->wsc.pending_cancel));
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p2p_connection_reset(dev);
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return;
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} else
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goto error;
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}
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done:
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if (ie_num)
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l_free(ie_iov[0].iov_base);
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if (strlen(creds[0].ssid) != bss->ssid_len ||
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memcmp(creds[0].ssid, bss->ssid, bss->ssid_len)) {
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l_error("Unsupported: the SSID from the P2P peer's WSC "
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"credentials doesn't match the SSID from the "
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"Probe Response IEs");
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goto not_supported;
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}
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scan_bss_free(bss);
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/*
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* Apparently some implementations send the intended client's address
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* here (i.e. our), and some send the target BSS's (their own).
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*/
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if (memcmp(creds[0].addr, netdev_get_address(dev->conn_netdev), 6) &&
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memcmp(creds[0].addr, bss->addr, 6)) {
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char addr1[32], addr2[32];
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l_strlcpy(addr1, util_address_to_string(creds[0].addr),
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sizeof(addr1));
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l_strlcpy(addr2, util_address_to_string(
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netdev_get_address(dev->conn_netdev)),
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sizeof(addr2));
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l_error("Error: WSC credentials are not for our client "
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"interface (%s vs. %s)", addr1, addr2);
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goto error;
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}
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if (!bss->rsne || creds[0].security != SECURITY_PSK)
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goto not_supported;
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if (creds[0].has_passphrase) {
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if (crypto_psk_from_passphrase(creds[0].passphrase, bss->ssid,
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bss->ssid_len,
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dev->conn_psk) < 0)
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goto error;
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} else
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memcpy(dev->conn_psk, creds[0].psk, 32);
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dev->conn_retry_count = 0;
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p2p_try_connect_group(dev);
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return;
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error:
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not_supported:
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p2p_connect_failed(dev);
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}
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static void p2p_provision_connect(struct p2p_device *dev)
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@ -963,7 +1008,8 @@ static void p2p_device_netdev_notify(struct netdev *netdev,
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switch (event) {
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case NETDEV_WATCH_EVENT_UP:
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case NETDEV_WATCH_EVENT_NEW:
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if (!dev->conn_wsc_bss || dev->conn_enrollee ||
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/* Ignore the event if we're already connecting/connected */
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if (dev->conn_enrollee || dev->conn_retry_count ||
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!netdev_get_is_up(netdev))
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break;
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@ -2459,7 +2505,7 @@ static void p2p_peer_disconnect(struct p2p_peer *peer)
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return;
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}
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if (dev->conn_netdev && !dev->conn_wsc_bss) {
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if (dev->conn_netdev && dev->conn_retry_count) {
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/* Note: in theory we need to add the P2P IEs here too */
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if (netdev_disconnect(dev->conn_netdev, p2p_peer_disconnect_cb,
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peer) == 0)
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