mesh: Make maximum number of peer links configurable

Maximum number of peer links is maximum number of connecting mesh peers
at the same time. This value is 0..255 based on the
dot11MeshNumberOfPeerings range.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>

src/drivers/driver.h

@@ -953,6 +953,7 @@ struct wpa_driver_mesh_join_params {
 	int ie_len;
 	int freq;
 	int beacon_int;
+	int max_peer_links;
 	enum ht_mode ht_mode;
 	struct wpa_driver_mesh_bss_params conf;
 #define WPA_DRIVER_MESH_FLAG_USER_MPM	0x00000001

src/drivers/driver_nl80211.c

@@ -7801,6 +7801,10 @@ wpa_driver_nl80211_join_mesh(void *priv,
 	if (!(params->conf.flags & WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS) &&
 	    nla_put_u32(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS, 0))
 		goto fail;
+	if ((params->conf.flags & WPA_DRIVER_MESH_FLAG_DRIVER_MPM) &&
+	    nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
+			params->max_peer_links))
+		goto fail;
 	nla_nest_end(msg, container);
 
 	ret = send_and_recv_msgs(drv, msg, NULL, NULL);

wpa_supplicant/config.c

@@ -3450,6 +3450,7 @@ struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
 	config->eapol_version = DEFAULT_EAPOL_VERSION;
 	config->ap_scan = DEFAULT_AP_SCAN;
 	config->user_mpm = DEFAULT_USER_MPM;
+	config->max_peer_links = DEFAULT_MAX_PEER_LINKS;
 	config->fast_reauth = DEFAULT_FAST_REAUTH;
 	config->p2p_go_intent = DEFAULT_P2P_GO_INTENT;
 	config->p2p_intra_bss = DEFAULT_P2P_INTRA_BSS;
@@ -3998,6 +3999,7 @@ static const struct global_parse_data global_fields[] = {
 	{ FUNC(bgscan), 0 },
 #ifdef CONFIG_MESH
 	{ INT(user_mpm), 0 },
+	{ INT_RANGE(max_peer_links, 0, 255), 0 },
 #endif /* CONFIG_MESH */
 	{ INT(disable_scan_offload), 0 },
 	{ INT(fast_reauth), 0 },

wpa_supplicant/config.h

@@ -16,6 +16,7 @@
 #define DEFAULT_AP_SCAN 1
 #endif /* CONFIG_NO_SCAN_PROCESSING */
 #define DEFAULT_USER_MPM 1
+#define DEFAULT_MAX_PEER_LINKS 99
 #define DEFAULT_FAST_REAUTH 1
 #define DEFAULT_P2P_GO_INTENT 7
 #define DEFAULT_P2P_INTRA_BSS 1
@@ -1111,6 +1112,13 @@ struct wpa_config {
 	 * If AMPE or SAE is enabled, the MPM is always in userspace.
 	 */
 	int user_mpm;
+
+	/**
+	 * max_peer_links - Maximum number of peer links
+	 *
+	 * Maximum number of mesh peering currently maintained by the STA.
+	 */
+	int max_peer_links;
 };
 
 

wpa_supplicant/config_file.c

@@ -1216,6 +1216,9 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 
 	if (config->user_mpm != DEFAULT_USER_MPM)
 		fprintf(f, "user_mpm=%d\n", config->user_mpm);
+
+	if (config->max_peer_links != DEFAULT_MAX_PEER_LINKS)
+		fprintf(f, "max_peer_links=%d\n", config->max_peer_links);
 }
 
 #endif /* CONFIG_NO_CONFIG_WRITE */

wpa_supplicant/mesh.c

@@ -169,7 +169,7 @@ static int wpa_supplicant_mesh_init(struct wpa_supplicant *wpa_s,
 	bss->iconf = conf;
 	ifmsh->conf = conf;
 
-	ifmsh->bss[0]->max_plinks = 99;
+	ifmsh->bss[0]->max_plinks = wpa_s->conf->max_peer_links;
 	os_strlcpy(bss->conf->iface, wpa_s->ifname, sizeof(bss->conf->iface));
 
 	mconf = mesh_config_create(ssid);
@@ -323,6 +323,7 @@ int wpa_supplicant_join_mesh(struct wpa_supplicant *wpa_s,
 		params.beacon_int = ssid->beacon_int;
 	else if (wpa_s->conf->beacon_int > 0)
 		params.beacon_int = wpa_s->conf->beacon_int;
+	params.max_peer_links = wpa_s->conf->max_peer_links;
 #ifdef CONFIG_IEEE80211N
 	params.ht_mode = ssid->mesh_ht_mode;
 #endif /* CONFIG_IEEE80211N */

wpa_supplicant/wpa_supplicant.conf

@@ -123,6 +123,10 @@ ap_scan=1
 # 1: wpa_supplicant provides an MPM which handles peering (default)
 #user_mpm=1
 
+# Maximum number of peer links (0-255; default: 99)
+# Maximum number of mesh peering currently maintained by the STA.
+#max_peer_links=99
+
 # EAP fast re-authentication
 # By default, fast re-authentication is enabled for all EAP methods that
 # support it. This variable can be used to disable fast re-authentication.