[PATCH/RFC 02/18] mesh: add mesh mode routines
Bob Copeland
me at bobcopeland.com
Mon Jul 14 01:19:07 EDT 2014
From: Thomas Pedersen <thomas at noack.us>
Add routines to (de)initialize mesh interface data structures and
join and leave mesh networks.
Signed-off-by: Javier Lopez <jlopex at gmail.com>
Signed-off-by: Javier Cardona <javier at cozybit.com>
Signed-off-by: Jason Mobarak <x at jason.mobarak.name>
Signed-hostap: Thomas Pedersen <thomas at noack.us>
---
wpa_supplicant/mesh.c | 277 ++++++++++++++++++++++++++++++++++++++++++++++++++
wpa_supplicant/mesh.h | 36 +++++++
2 files changed, 313 insertions(+)
create mode 100644 wpa_supplicant/mesh.c
create mode 100644 wpa_supplicant/mesh.h
diff --git a/wpa_supplicant/mesh.c b/wpa_supplicant/mesh.c
new file mode 100644
index 0000000..5b4f5d9
--- /dev/null
+++ b/wpa_supplicant/mesh.c
@@ -0,0 +1,277 @@
+/*
+ * WPA Supplicant - Basic mesh mode routines
+ * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "mesh.h"
+
+static void
+wpa_supplicant_mesh_deinit(struct wpa_supplicant *wpa_s)
+{
+ wpa_supplicant_mesh_iface_deinit(wpa_s, wpa_s->ifmsh);
+ wpa_s->ifmsh = NULL;
+ /* TODO: leave mesh (stop beacon). This will happen on link down
+ * anyway, so it's not urgent */
+}
+
+void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
+ struct hostapd_iface *ifmsh)
+{
+ if (!ifmsh)
+ return;
+
+ if (ifmsh->mconf) {
+ if (ifmsh->mconf->ies)
+ ifmsh->mconf->ies = NULL;
+ /* We cannot free this struct
+ * because wpa_authenticator on
+ * hostapd side is also using it
+ * for now just set to NULL and
+ * let hostapd code free it.
+ */
+ os_free(ifmsh->mconf);
+ ifmsh->mconf = NULL;
+ }
+
+ /* take care of shared data */
+ hostapd_interface_deinit(ifmsh);
+ hostapd_interface_free(ifmsh);
+}
+
+static struct mesh_conf *
+mesh_config_create(struct wpa_ssid *ssid)
+{
+ struct mesh_conf *conf;
+
+ conf = os_zalloc(sizeof(struct mesh_conf));
+ if (!conf)
+ return NULL;
+
+ os_memcpy(conf->meshid, ssid->ssid, ssid->ssid_len);
+ conf->meshid_len = ssid->ssid_len;
+
+ if (ssid->key_mgmt & WPA_KEY_MGMT_SAE)
+ conf->security |= MESH_CONF_SEC_AUTH |
+ MESH_CONF_SEC_AMPE;
+ else
+ conf->security |= MESH_CONF_SEC_NONE;
+
+ /* defaults */
+ conf->mesh_pp_id = MESH_PATH_PROTOCOL_HWMP;
+ conf->mesh_pm_id = MESH_PATH_METRIC_AIRTIME;
+ conf->mesh_cc_id = 0;
+ conf->mesh_sp_id = MESH_SYNC_METHOD_NEIGHBOR_OFFSET;
+ conf->mesh_auth_id = (conf->security & MESH_CONF_SEC_AUTH) ? 1 : 0;
+
+ return conf;
+}
+
+static int
+wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
+ struct wpa_ssid *ssid)
+{
+ struct hostapd_iface *ifmsh;
+ struct hostapd_data *bss;
+ struct hostapd_config *conf;
+ struct mesh_conf *mconf;
+ int basic_rates_erp[] = {10, 20, 55, 60, 110, 120, 240, -1 };
+ static int default_groups[] = { 19, 20, 21, 25, 26 };
+ size_t len;
+
+ wpa_s->ifmsh = ifmsh = os_zalloc(sizeof(*wpa_s->ifmsh));
+ if (!ifmsh)
+ return -ENOMEM;
+
+ ifmsh->num_bss = 1;
+ ifmsh->bss = os_calloc(wpa_s->ifmsh->num_bss,
+ sizeof(struct hostapd_data *));
+ if (!ifmsh->bss)
+ goto out_free;
+
+ ifmsh->bss[0] = bss = os_zalloc(sizeof(struct hostapd_data));
+ if (!bss)
+ goto out_free;
+
+ os_memcpy(bss->own_addr, wpa_s->own_addr, ETH_ALEN);
+ bss->driver = wpa_s->driver;
+ bss->drv_priv = wpa_s->drv_priv;
+ bss->iface = ifmsh;
+ wpa_s->assoc_freq = ssid->frequency;
+ wpa_s->current_ssid = ssid;
+
+ /* setup an AP config for auth processing */
+ conf = hostapd_config_defaults();
+ if (!conf)
+ goto out_free;
+
+ bss->conf = *conf->bss;
+ bss->conf->start_disabled = 1;
+ bss->conf->mesh = MESH_ENABLED;
+ bss->iconf = conf;
+ ifmsh->conf = conf;
+
+ ifmsh->bss[0]->max_plinks = 99;
+ os_strlcpy(bss->conf->iface, wpa_s->ifname, sizeof(bss->conf->iface));
+
+ mconf = mesh_config_create(ssid);
+ if (!mconf)
+ goto out_free;
+ ifmsh->mconf = mconf;
+
+ /* need conf->hw_mode for supported rates. */
+ /* c.f. wpa_supplicant/ap.c:wpa_supplicant_conf_ap() */
+ if (ssid->frequency == 0) {
+ conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
+ conf->channel = 1;
+ } else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
+ conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
+ conf->channel = (ssid->frequency - 2407) / 5;
+ } else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
+ (ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
+ conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
+ conf->channel = (ssid->frequency - 5000) / 5;
+ } else if (ssid->frequency >= 56160 + 2160 * 1 &&
+ ssid->frequency <= 56160 + 2160 * 4) {
+ conf->hw_mode = HOSTAPD_MODE_IEEE80211AD;
+ conf->channel = (ssid->frequency - 56160) / 2160;
+ } else {
+ wpa_printf(MSG_ERROR, "Unsupported mesh mode frequency: %d MHz",
+ ssid->frequency);
+ goto out_free;
+ }
+
+ /* XXX: hack! this is so an MPM which correctly sets the ERP
+ * mandatory rates as BSSBasicRateSet doesn't reject us. We
+ * could add a new hw_mode HOSTAPD_MODE_IEEE80211G_ERP, but
+ * this is way easier. This also makes our BSSBasicRateSet
+ * advertised in beacons match the one in peering frames, sigh.
+ * */
+ if (conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
+ conf->basic_rates = os_zalloc(sizeof(basic_rates_erp));
+ if (!conf->basic_rates)
+ goto out_free;
+ os_memcpy(conf->basic_rates,
+ basic_rates_erp, sizeof(basic_rates_erp));
+ }
+
+ hostapd_setup_interface(ifmsh);
+
+ if (wpa_drv_init_mesh(wpa_s)) {
+ wpa_msg(wpa_s, MSG_ERROR, "failed to init mesh in driver");
+ return -1;
+ }
+
+ if (mconf->security != MESH_CONF_SEC_NONE) {
+ bss->conf->wpa = ssid->proto;
+ bss->conf->wpa_key_mgmt = ssid->key_mgmt;
+ bss->conf->sae_groups = wpa_s->conf->sae_groups;
+
+ if (wpa_s->conf->sae_groups) {
+ bss->conf->sae_groups =
+ os_zalloc(sizeof(wpa_s->conf->sae_groups));
+ os_memcpy(bss->conf->sae_groups,
+ wpa_s->conf->sae_groups,
+ sizeof(wpa_s->conf->sae_groups));
+ } else {
+ bss->conf->sae_groups =
+ os_zalloc(sizeof(default_groups));
+ os_memcpy(bss->conf->sae_groups,
+ default_groups,
+ sizeof(default_groups));
+ }
+
+ len = os_strlen(ssid->passphrase);
+ bss->conf->ssid.wpa_passphrase =
+ dup_binstr(ssid->passphrase, len);
+ }
+
+ return 0;
+out_free:
+ wpa_supplicant_mesh_deinit(wpa_s);
+ return -ENOMEM;
+}
+
+void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
+ const u8 *ies, int ie_len)
+{
+ struct ieee802_11_elems elems;
+
+ wpa_msg(wpa_s, MSG_INFO,
+ "new peer notification for " MACSTR, MAC2STR(addr));
+
+ if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
+ wpa_msg(wpa_s, MSG_INFO, "Could not parse beacon from " MACSTR,
+ MAC2STR(addr));
+ }
+}
+
+int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
+ struct wpa_ssid *ssid)
+{
+ struct wpa_driver_mesh_join_params params;
+ int ret = 0;
+
+ if (!ssid || !ssid->ssid || !ssid->ssid_len || !ssid->frequency) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ wpa_supplicant_mesh_deinit(wpa_s);
+
+ os_memset(¶ms, 0, sizeof(params));
+ params.meshid = ssid->ssid;
+ params.meshid_len = ssid->ssid_len;
+ params.freq = ssid->frequency;
+
+ if (ssid->key_mgmt & WPA_KEY_MGMT_SAE) {
+ params.flags |= WPA_DRIVER_MESH_FLAG_SAE_AUTH;
+ params.flags |= WPA_DRIVER_MESH_FLAG_AMPE;
+ }
+
+ params.flags |= WPA_DRIVER_MESH_FLAG_DRIVER_MPM;
+ params.conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
+
+ if (wpa_supplicant_mesh_init(wpa_s, ssid)) {
+ wpa_msg(wpa_s, MSG_ERROR, "failed to init mesh");
+ goto out;
+ }
+
+ if (wpa_s->ifmsh) {
+ params.ies = wpa_s->ifmsh->mconf->ies;
+ params.ie_len = wpa_s->ifmsh->mconf->ie_len;
+ params.basic_rates = wpa_s->ifmsh->basic_rates;
+ }
+
+ wpa_msg(wpa_s, MSG_INFO, "joining mesh %s",
+ wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
+ ret = wpa_drv_join_mesh(wpa_s, ¶ms);
+ if (ret)
+ wpa_msg(wpa_s, MSG_ERROR, "mesh join error=%d\n", ret);
+
+ /* hostapd sets the interface down until we associate */
+ wpa_drv_set_operstate(wpa_s, 1);
+
+out:
+ return ret;
+}
+
+int wpa_supplicant_leave_mesh(struct wpa_supplicant *wpa_s)
+{
+ int ret = 0;
+
+ wpa_msg(wpa_s, MSG_INFO, "leaving mesh");
+
+ ret = wpa_drv_leave_mesh(wpa_s);
+
+ if (ret)
+ wpa_msg(wpa_s, MSG_ERROR, "mesh leave error=%d\n", ret);
+
+ wpa_drv_set_operstate(wpa_s, 1);
+
+ wpa_supplicant_mesh_deinit(wpa_s);
+
+ return ret;
+}
diff --git a/wpa_supplicant/mesh.h b/wpa_supplicant/mesh.h
new file mode 100644
index 0000000..f08e641
--- /dev/null
+++ b/wpa_supplicant/mesh.h
@@ -0,0 +1,36 @@
+/*
+ * WPA Supplicant - Basic mesh mode routines
+ * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef MESH_H
+#define MESH_H
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "utils/uuid.h"
+#include "common/ieee802_11_defs.h"
+#include "common/wpa_ctrl.h"
+#include "common/ieee802_11_defs.h"
+#include "config_ssid.h"
+#include "config.h"
+#include "wpa_supplicant_i.h"
+#include "driver_i.h"
+#include "notify.h"
+
+#include "ap/sta_info.h"
+#include "ap/hostapd.h"
+#include "ap/ieee802_11.h"
+
+int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
+ struct wpa_ssid *ssid);
+int wpa_supplicant_leave_mesh(struct wpa_supplicant *wpa_s);
+void wpa_mesh_notify_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
+ const u8 *ies, int ie_len);
+void wpa_supplicant_mesh_iface_deinit(struct wpa_supplicant *wpa_s,
+ struct hostapd_iface *ifmsh);
+#endif /* MESH_H */
--
2.0.0.rc2
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