P2P: Add support for IP address assignment in 4-way handshake

This new mechanism allows P2P Client to request an IPv4 address from the
GO as part of the 4-way handshake to avoid use of DHCP exchange after
4-way handshake. If the new mechanism is used, the assigned IP address
is shown in the P2P-GROUP-STARTED event on the client side with
following new parameters: ip_addr, ip_mask, go_ip_addr. The assigned IP
address is included in the AP-STA-CONNECTED event on the GO side as a
new ip_addr parameter. The IP address is valid for the duration of the
association.

The IP address pool for this new mechanism is configured as global
wpa_supplicant configuration file parameters ip_addr_go, ip_addr_mask,
ip_addr_star, ip_addr_end. For example:

ip_addr_go=192.168.42.1
ip_addr_mask=255.255.255.0
ip_addr_start=192.168.42.2
ip_addr_end=192.168.42.100

DHCP mechanism is expected to be enabled at the same time to support P2P
Devices that do not use the new mechanism. The easiest way of managing
the IP addresses is by splitting the IP address range into two parts and
assign a separate range for wpa_supplicant and DHCP server.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/ap_config.h

@@ -384,6 +384,12 @@ struct hostapd_bss_config {
 #define P2P_MANAGE BIT(3)
 #define P2P_ALLOW_CROSS_CONNECTION BIT(4)
 	int p2p;
+#ifdef CONFIG_P2P
+	u8 ip_addr_go[4];
+	u8 ip_addr_mask[4];
+	u8 ip_addr_start[4];
+	u8 ip_addr_end[4];
+#endif /* CONFIG_P2P */
 
 	int disassoc_low_ack;
 	int skip_inactivity_poll;

src/ap/sta_info.c

@@ -908,6 +908,7 @@ void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 	char buf[100];
 #ifdef CONFIG_P2P
 	u8 addr[ETH_ALEN];
+	u8 ip_addr_buf[4];
 #endif /* CONFIG_P2P */
 
 	if (!!authorized == !!(sta->flags & WLAN_STA_AUTHORIZED))
@@ -929,12 +930,25 @@ void ap_sta_set_authorized(struct hostapd_data *hapd, struct sta_info *sta,
 		os_snprintf(buf, sizeof(buf), MACSTR, MAC2STR(sta->addr));
 
 	if (authorized) {
-		wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s", buf);
+		char ip_addr[100];
+		ip_addr[0] = '\0';
+#ifdef CONFIG_P2P
+		if (wpa_auth_get_ip_addr(sta->wpa_sm, ip_addr_buf) == 0) {
+			os_snprintf(ip_addr, sizeof(ip_addr),
+				    " ip_addr=%u.%u.%u.%u",
+				    ip_addr_buf[0], ip_addr_buf[1],
+				    ip_addr_buf[2], ip_addr_buf[3]);
+		}
+#endif /* CONFIG_P2P */
+
+		wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_CONNECTED "%s%s",
+			buf, ip_addr);
 
 		if (hapd->msg_ctx_parent &&
 		    hapd->msg_ctx_parent != hapd->msg_ctx)
 			wpa_msg_no_global(hapd->msg_ctx_parent, MSG_INFO,
-					  AP_STA_CONNECTED "%s", buf);
+					  AP_STA_CONNECTED "%s%s",
+					  buf, ip_addr);
 
 		sta->flags |= WLAN_STA_AUTHORIZED;
 	} else {

src/ap/wpa_auth.c

@@ -11,6 +11,7 @@
 #include "utils/common.h"
 #include "utils/eloop.h"
 #include "utils/state_machine.h"
+#include "utils/bitfield.h"
 #include "common/ieee802_11_defs.h"
 #include "crypto/aes_wrap.h"
 #include "crypto/crypto.h"
@@ -424,6 +425,17 @@ struct wpa_authenticator * wpa_init(const u8 *addr,
 				       wpa_rekey_gtk, wpa_auth, NULL);
 	}
 
+#ifdef CONFIG_P2P
+	if (WPA_GET_BE32(conf->ip_addr_start)) {
+		int count = WPA_GET_BE32(conf->ip_addr_end) -
+			WPA_GET_BE32(conf->ip_addr_start) + 1;
+		if (count > 1000)
+			count = 1000;
+		if (count > 0)
+			wpa_auth->ip_pool = bitfield_alloc(count);
+	}
+#endif /* CONFIG_P2P */
+
 	return wpa_auth;
 }
 
@@ -466,6 +478,11 @@ void wpa_deinit(struct wpa_authenticator *wpa_auth)
 	wpa_auth->ft_pmk_cache = NULL;
 #endif /* CONFIG_IEEE80211R */
 
+#ifdef CONFIG_P2P
+	bitfield_free(wpa_auth->ip_pool);
+#endif /* CONFIG_P2P */
+
+
 	os_free(wpa_auth->wpa_ie);
 
 	group = wpa_auth->group;
@@ -583,6 +600,19 @@ void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
 
 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
 {
+#ifdef CONFIG_P2P
+	if (WPA_GET_BE32(sm->ip_addr)) {
+		u32 start;
+		wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
+			   "address %u.%u.%u.%u from " MACSTR,
+			   sm->ip_addr[0], sm->ip_addr[1],
+			   sm->ip_addr[2], sm->ip_addr[3],
+			   MAC2STR(sm->addr));
+		start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
+		bitfield_clear(sm->wpa_auth->ip_pool,
+			       WPA_GET_BE32(sm->ip_addr) - start);
+	}
+#endif /* CONFIG_P2P */
 	if (sm->GUpdateStationKeys) {
 		sm->group->GKeyDoneStations--;
 		sm->GUpdateStationKeys = FALSE;
@@ -1000,6 +1030,26 @@ continue_processing:
 			return;
 		}
 #endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_P2P
+		if (kde.ip_addr_req && kde.ip_addr_req[0] &&
+		    wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
+			int idx;
+			wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
+				   "EAPOL-Key exchange");
+			idx = bitfield_get_first_zero(wpa_auth->ip_pool);
+			if (idx >= 0) {
+				u32 start = WPA_GET_BE32(wpa_auth->conf.
+							 ip_addr_start);
+				bitfield_set(wpa_auth->ip_pool, idx);
+				WPA_PUT_BE32(sm->ip_addr, start + idx);
+				wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
+					   "address %u.%u.%u.%u to " MACSTR,
+					   sm->ip_addr[0], sm->ip_addr[1],
+					   sm->ip_addr[2], sm->ip_addr[3],
+					   MAC2STR(sm->addr));
+			}
+		}
+#endif /* CONFIG_P2P */
 		break;
 	case PAIRWISE_4:
 		if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
@@ -1995,6 +2045,10 @@ SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
 		kde_len += 300; /* FTIE + 2 * TIE */
 	}
 #endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_P2P
+	if (WPA_GET_BE32(sm->ip_addr) > 0)
+		kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
+#endif /* CONFIG_P2P */
 	kde = os_malloc(kde_len);
 	if (kde == NULL)
 		return;
@@ -2056,6 +2110,16 @@ SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
 		pos += 4;
 	}
 #endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_P2P
+	if (WPA_GET_BE32(sm->ip_addr) > 0) {
+		u8 addr[3 * 4];
+		os_memcpy(addr, sm->ip_addr, 4);
+		os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
+		os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
+		pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
+				  addr, sizeof(addr), NULL, 0);
+	}
+#endif /* CONFIG_P2P */
 
 	wpa_send_eapol(sm->wpa_auth, sm,
 		       (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
@@ -3103,3 +3167,14 @@ int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
 		return 0;
 	return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
 }
+
+
+#ifdef CONFIG_P2P
+int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
+{
+	if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
+		return -1;
+	os_memcpy(addr, sm->ip_addr, 4);
+	return 0;
+}
+#endif /* CONFIG_P2P */

src/ap/wpa_auth.h

@@ -163,6 +163,12 @@ struct wpa_auth_config {
 #ifdef CONFIG_TESTING_OPTIONS
 	double corrupt_gtk_rekey_mic_probability;
 #endif /* CONFIG_TESTING_OPTIONS */
+#ifdef CONFIG_P2P
+	u8 ip_addr_go[4];
+	u8 ip_addr_mask[4];
+	u8 ip_addr_start[4];
+	u8 ip_addr_end[4];
+#endif /* CONFIG_P2P */
 };
 
 typedef enum {
@@ -297,4 +303,6 @@ int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos);
 int wpa_auth_uses_sae(struct wpa_state_machine *sm);
 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm);
 
+int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr);
+
 #endif /* WPA_AUTH_H */

src/ap/wpa_auth_glue.c

@@ -78,6 +78,12 @@ static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf,
 	wconf->corrupt_gtk_rekey_mic_probability =
 		iconf->corrupt_gtk_rekey_mic_probability;
 #endif /* CONFIG_TESTING_OPTIONS */
+#ifdef CONFIG_P2P
+	os_memcpy(wconf->ip_addr_go, conf->ip_addr_go, 4);
+	os_memcpy(wconf->ip_addr_mask, conf->ip_addr_mask, 4);
+	os_memcpy(wconf->ip_addr_start, conf->ip_addr_start, 4);
+	os_memcpy(wconf->ip_addr_end, conf->ip_addr_end, 4);
+#endif /* CONFIG_P2P */
 }
 
 

src/ap/wpa_auth_i.h

@@ -121,6 +121,10 @@ struct wpa_state_machine {
 #endif /* CONFIG_IEEE80211R */
 
 	int pending_1_of_4_timeout;
+
+#ifdef CONFIG_P2P
+	u8 ip_addr[4];
+#endif /* CONFIG_P2P */
 };
 
 
@@ -185,6 +189,10 @@ struct wpa_authenticator {
 
 	struct rsn_pmksa_cache *pmksa;
 	struct wpa_ft_pmk_cache *ft_pmk_cache;
+
+#ifdef CONFIG_P2P
+	struct bitfield *ip_pool;
+#endif /* CONFIG_P2P */
 };
 
 

src/ap/wpa_auth_ie.c

@@ -708,6 +708,25 @@ static int wpa_parse_generic(const u8 *pos, const u8 *end,
 	}
 #endif /* CONFIG_IEEE80211W */
 
+#ifdef CONFIG_P2P
+	if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
+	    RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
+		ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
+		wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
+			    ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
+		return 0;
+	}
+
+	if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
+	    RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
+		ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
+		wpa_hexdump(MSG_DEBUG,
+			    "WPA: IP Address Allocation in EAPOL-Key",
+			    ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
+		return 0;
+	}
+#endif /* CONFIG_P2P */
+
 	return 0;
 }
 

src/ap/wpa_auth_ie.h

@@ -39,6 +39,10 @@ struct wpa_eapol_ie_parse {
 	const u8 *ftie;
 	size_t ftie_len;
 #endif /* CONFIG_IEEE80211R */
+#ifdef CONFIG_P2P
+	const u8 *ip_addr_req;
+	const u8 *ip_addr_alloc;
+#endif /* CONFIG_P2P */
 };
 
 int wpa_parse_kde_ies(const u8 *buf, size_t len,

src/common/ieee802_11_defs.h

@@ -948,6 +948,7 @@ enum p2p_attr_id {
 #define P2P_GROUP_CAPAB_CROSS_CONN BIT(4)
 #define P2P_GROUP_CAPAB_PERSISTENT_RECONN BIT(5)
 #define P2P_GROUP_CAPAB_GROUP_FORMATION BIT(6)
+#define P2P_GROUP_CAPAB_IP_ADDR_ALLOCATION BIT(7)
 
 /* Invitation Flags */
 #define P2P_INVITATION_FLAGS_TYPE BIT(0)

src/common/wpa_common.h

@@ -109,6 +109,9 @@ RSN_SELECTOR(0x00, 0x0f, 0xac, 13)
 #define RSN_KEY_DATA_MULTIBAND_GTK RSN_SELECTOR(0x00, 0x0f, 0xac, 11)
 #define RSN_KEY_DATA_MULTIBAND_KEYID RSN_SELECTOR(0x00, 0x0f, 0xac, 12)
 
+#define WFA_KEY_DATA_IP_ADDR_REQ RSN_SELECTOR(0x50, 0x6f, 0x9a, 4)
+#define WFA_KEY_DATA_IP_ADDR_ALLOC RSN_SELECTOR(0x50, 0x6f, 0x9a, 5)
+
 #define WPA_OUI_TYPE RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
 
 #define RSN_SELECTOR_PUT(a, val) WPA_PUT_BE32((u8 *) (a), (val))

src/p2p/p2p_group.c

@@ -154,6 +154,7 @@ static void p2p_group_add_common_ies(struct p2p_group *group,
 		group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
 	if (group->num_members >= group->cfg->max_clients)
 		group_capab |= P2P_GROUP_CAPAB_GROUP_LIMIT;
+	group_capab |= P2P_GROUP_CAPAB_IP_ADDR_ALLOCATION;
 	p2p_buf_add_capability(ie, dev_capab, group_capab);
 }
 

src/rsn_supp/wpa.c

@@ -379,6 +379,8 @@ static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
 	struct wpa_ptk *ptk;
 	u8 buf[8];
 	int res;
+	u8 *kde, *kde_buf = NULL;
+	size_t kde_len;
 
 	if (wpa_sm_get_network_ctx(sm) == NULL) {
 		wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
@@ -435,15 +437,39 @@ static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
 	os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
 	sm->tptk_set = 1;
 
+	kde = sm->assoc_wpa_ie;
+	kde_len = sm->assoc_wpa_ie_len;
+
+#ifdef CONFIG_P2P
+	if (sm->p2p) {
+		kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1);
+		if (kde_buf) {
+			u8 *pos;
+			wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE "
+				   "into EAPOL-Key 2/4");
+			os_memcpy(kde_buf, kde, kde_len);
+			kde = kde_buf;
+			pos = kde + kde_len;
+			*pos++ = WLAN_EID_VENDOR_SPECIFIC;
+			*pos++ = RSN_SELECTOR_LEN + 1;
+			RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ);
+			pos += RSN_SELECTOR_LEN;
+			*pos++ = 0x01;
+			kde_len = pos - kde;
+		}
+	}
+#endif /* CONFIG_P2P */
+
 	if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
-				       sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
-				       ptk))
+				       kde, kde_len, ptk))
 		goto failed;
 
+	os_free(kde_buf);
 	os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
 	return;
 
 failed:
+	os_free(kde_buf);
 	wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
 }
 
@@ -1090,6 +1116,14 @@ static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
 		goto failed;
 	}
 
+#ifdef CONFIG_P2P
+	if (ie.ip_addr_alloc) {
+		os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4);
+		wpa_hexdump(MSG_DEBUG, "P2P: IP address info",
+			    sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr));
+	}
+#endif /* CONFIG_P2P */
+
 	if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
 				       NULL, 0, &sm->ptk)) {
 		goto failed;
@@ -2086,6 +2120,10 @@ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
 #ifdef CONFIG_TDLS
 	wpa_tdls_assoc(sm);
 #endif /* CONFIG_TDLS */
+
+#ifdef CONFIG_P2P
+	os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr));
+#endif /* CONFIG_P2P */
 }
 
 
@@ -2209,6 +2247,7 @@ void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
 		} else
 			sm->ssid_len = 0;
 		sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
+		sm->p2p = config->p2p;
 	} else {
 		sm->network_ctx = NULL;
 		sm->peerkey_enabled = 0;
@@ -2218,6 +2257,7 @@ void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
 		sm->eap_conf_ctx = NULL;
 		sm->ssid_len = 0;
 		sm->wpa_ptk_rekey = 0;
+		sm->p2p = 0;
 	}
 }
 
@@ -2731,3 +2771,16 @@ int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr,
 	return 1;
 }
 #endif /* CONFIG_PEERKEY */
+
+
+#ifdef CONFIG_P2P
+
+int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf)
+{
+	if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0)
+		return -1;
+	os_memcpy(buf, sm->p2p_ip_addr, 3 * 4);
+	return 0;
+}
+
+#endif /* CONFIG_P2P */

src/rsn_supp/wpa.h

@@ -95,6 +95,7 @@ struct rsn_supp_config {
 	const u8 *ssid;
 	size_t ssid_len;
 	int wpa_ptk_rekey;
+	int p2p;
 };
 
 #ifndef CONFIG_NO_WPA
@@ -145,6 +146,8 @@ void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr);
 
 void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx);
 
+int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf);
+
 #else /* CONFIG_NO_WPA */
 
 static inline struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)

src/rsn_supp/wpa_i.h

@@ -58,6 +58,7 @@ struct wpa_sm {
 	u8 ssid[32];
 	size_t ssid_len;
 	int wpa_ptk_rekey;
+	int p2p;
 
 	u8 own_addr[ETH_ALEN];
 	const char *ifname;
@@ -122,6 +123,10 @@ struct wpa_sm {
 	u8 *assoc_resp_ies; /* MDIE and FTIE from (Re)Association Response */
 	size_t assoc_resp_ies_len;
 #endif /* CONFIG_IEEE80211R */
+
+#ifdef CONFIG_P2P
+	u8 p2p_ip_addr[3 * 4];
+#endif /* CONFIG_P2P */
 };
 
 

src/rsn_supp/wpa_ie.c

@@ -345,6 +345,25 @@ static int wpa_parse_generic(const u8 *pos, const u8 *end,
 	}
 #endif /* CONFIG_IEEE80211W */
 
+#ifdef CONFIG_P2P
+	if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
+	    RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
+		ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
+		wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
+			    ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
+		return 0;
+	}
+
+	if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
+	    RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
+		ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
+		wpa_hexdump(MSG_DEBUG,
+			    "WPA: IP Address Allocation in EAPOL-Key",
+			    ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
+		return 0;
+	}
+#endif /* CONFIG_P2P */
+
 	return 0;
 }
 

src/rsn_supp/wpa_ie.h

@@ -59,6 +59,10 @@ struct wpa_eapol_ie_parse {
 	size_t supp_oper_classes_len;
 	u8 qosinfo;
 	u16 aid;
+#ifdef CONFIG_P2P
+	const u8 *ip_addr_req;
+	const u8 *ip_addr_alloc;
+#endif /* CONFIG_P2P */
 };
 
 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,

wpa_supplicant/Android.mk

@@ -255,6 +255,7 @@ OBJS += src/p2p/p2p_invitation.c
 OBJS += src/p2p/p2p_dev_disc.c
 OBJS += src/p2p/p2p_group.c
 OBJS += src/ap/p2p_hostapd.c
+OBJS += src/utils/bitfield.c
 L_CFLAGS += -DCONFIG_P2P
 NEED_GAS=y
 NEED_OFFCHANNEL=y

wpa_supplicant/Makefile

@@ -257,6 +257,7 @@ OBJS += ../src/p2p/p2p_invitation.o
 OBJS += ../src/p2p/p2p_dev_disc.o
 OBJS += ../src/p2p/p2p_group.o
 OBJS += ../src/ap/p2p_hostapd.o
+OBJS += ../src/utils/bitfield.o
 CFLAGS += -DCONFIG_P2P
 NEED_GAS=y
 NEED_OFFCHANNEL=y

wpa_supplicant/ap.c

@@ -182,6 +182,16 @@ static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 
 	bss->isolate = !wpa_s->conf->p2p_intra_bss;
 	bss->force_per_enrollee_psk = wpa_s->global->p2p_per_sta_psk;
+
+	if (ssid->p2p_group) {
+		os_memcpy(bss->ip_addr_go, wpa_s->parent->conf->ip_addr_go, 4);
+		os_memcpy(bss->ip_addr_mask, wpa_s->parent->conf->ip_addr_mask,
+			  4);
+		os_memcpy(bss->ip_addr_start,
+			  wpa_s->parent->conf->ip_addr_start, 4);
+		os_memcpy(bss->ip_addr_end, wpa_s->parent->conf->ip_addr_end,
+			  4);
+	}
 #endif /* CONFIG_P2P */
 
 	if (ssid->ssid_len == 0) {

wpa_supplicant/config.c

@@ -10,6 +10,7 @@
 
 #include "common.h"
 #include "utils/uuid.h"
+#include "utils/ip_addr.h"
 #include "crypto/sha1.h"
 #include "rsn_supp/wpa.h"
 #include "eap_peer/eap.h"
@@ -2971,6 +2972,29 @@ static int wpa_config_process_freq_list(const struct global_parse_data *data,
 }
 
 
+#ifdef CONFIG_P2P
+static int wpa_global_config_parse_ipv4(const struct global_parse_data *data,
+					struct wpa_config *config, int line,
+					const char *pos)
+{
+	u32 *dst;
+	struct hostapd_ip_addr addr;
+
+	if (hostapd_parse_ip_addr(pos, &addr) < 0)
+		return -1;
+	if (addr.af != AF_INET)
+		return -1;
+
+	dst = (u32 *) (((u8 *) config) + (long) data->param1);
+	os_memcpy(dst, &addr.u.v4.s_addr, 4);
+	wpa_printf(MSG_DEBUG, "%s = 0x%x", data->name,
+		   WPA_GET_BE32((u8 *) dst));
+
+	return 0;
+}
+#endif /* CONFIG_P2P */
+
+
 static int wpa_config_process_country(const struct global_parse_data *data,
 				      struct wpa_config *config, int line,
 				      const char *pos)
@@ -3275,6 +3299,7 @@ static int wpa_config_process_no_ctrl_interface(
 #define STR(f) _STR(f), NULL, NULL
 #define STR_RANGE(f, min, max) _STR(f), (void *) min, (void *) max
 #define BIN(f) #f, wpa_global_config_parse_bin, OFFSET(f), NULL, NULL
+#define IPV4(f) #f, wpa_global_config_parse_ipv4, OFFSET(f), NULL, NULL
 
 static const struct global_parse_data global_fields[] = {
 #ifdef CONFIG_CTRL_IFACE
@@ -3333,6 +3358,10 @@ static const struct global_parse_data global_fields[] = {
 	{ INT(p2p_disabled), 0 },
 	{ INT(p2p_no_group_iface), 0 },
 	{ INT_RANGE(p2p_ignore_shared_freq, 0, 1), 0 },
+	{ IPV4(ip_addr_go), 0 },
+	{ IPV4(ip_addr_mask), 0 },
+	{ IPV4(ip_addr_start), 0 },
+	{ IPV4(ip_addr_end), 0 },
 #endif /* CONFIG_P2P */
 	{ FUNC(country), CFG_CHANGED_COUNTRY },
 	{ INT(bss_max_count), 0 },
@@ -3379,6 +3408,7 @@ static const struct global_parse_data global_fields[] = {
 #undef STR
 #undef STR_RANGE
 #undef BIN
+#undef IPV4
 #define NUM_GLOBAL_FIELDS ARRAY_SIZE(global_fields)
 
 

wpa_supplicant/config.h

@@ -948,6 +948,11 @@ struct wpa_config {
 	 * specified TDLS peers.
 	 */
 	int tdls_external_control;
+
+	u8 ip_addr_go[4];
+	u8 ip_addr_mask[4];
+	u8 ip_addr_start[4];
+	u8 ip_addr_end[4];
 };
 
 

wpa_supplicant/examples/p2p-action.sh

@@ -41,6 +41,19 @@ if [ "$CMD" = "P2P-GROUP-STARTED" ]; then
 	kill_daemon dhclient /var/run/dhclient-$GIFNAME.pid
 	rm /var/run/dhclient.leases-$GIFNAME
 	kill_daemon dnsmasq /var/run/dnsmasq.pid-$GIFNAME
+	ipaddr=`echo "$*" | sed 's/.* ip_addr=\([^ ]*\).*/\1/'`
+	ipmask=`echo "$*" | sed 's/.* ip_mask=\([^ ]*\).*/\1/'`
+	goipaddr=`echo "$*" | sed 's/.* go_ip_addr=\([^ ]*\).*/\1/'`
+	if echo "$ipaddr$ipmask$goipaddr" | grep -q ' '; then
+	    ipaddr=""
+	    ipmask=""
+	    goipaddr=""
+	fi
+	if [ -n "$ipaddr" ]; then
+	    sudo ifconfig $GIFNAME "$ipaddr" netmask "$ipmask"
+	    sudo ip ro re default via "$goipaddr"
+	    exit 0
+	fi
 	dhclient -pf /var/run/dhclient-$GIFNAME.pid \
 	    -lf /var/run/dhclient.leases-$GIFNAME \
 	    -nw \

wpa_supplicant/p2p_supplicant.c

@@ -5783,6 +5783,8 @@ void wpas_p2p_completed(struct wpa_supplicant *wpa_s)
 	int network_id = -1;
 	int persistent;
 	int freq;
+	u8 ip[3 * 4];
+	char ip_addr[100];
 
 	if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION) {
 		eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
@@ -5807,23 +5809,33 @@ void wpas_p2p_completed(struct wpa_supplicant *wpa_s)
 
 	freq = wpa_s->current_bss ? wpa_s->current_bss->freq :
 		(int) wpa_s->assoc_freq;
+
+	ip_addr[0] = '\0';
+	if (wpa_sm_get_p2p_ip_addr(wpa_s->wpa, ip) == 0) {
+		os_snprintf(ip_addr, sizeof(ip_addr), " ip_addr=%u.%u.%u.%u "
+			    "ip_mask=%u.%u.%u.%u go_ip_addr=%u.%u.%u.%u",
+			    ip[0], ip[1], ip[2], ip[3],
+			    ip[4], ip[5], ip[6], ip[7],
+			    ip[8], ip[9], ip[10], ip[11]);
+	}
+
 	if (ssid->passphrase == NULL && ssid->psk_set) {
 		char psk[65];
 		wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32);
 		wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
 			       "%s client ssid=\"%s\" freq=%d psk=%s "
-			       "go_dev_addr=" MACSTR "%s",
+			       "go_dev_addr=" MACSTR "%s%s",
 			       wpa_s->ifname, ssid_txt, freq, psk,
 			       MAC2STR(go_dev_addr),
-			       persistent ? " [PERSISTENT]" : "");
+			       persistent ? " [PERSISTENT]" : "", ip_addr);
 	} else {
 		wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
 			       "%s client ssid=\"%s\" freq=%d "
-			       "passphrase=\"%s\" go_dev_addr=" MACSTR "%s",
+			       "passphrase=\"%s\" go_dev_addr=" MACSTR "%s%s",
 			       wpa_s->ifname, ssid_txt, freq,
 			       ssid->passphrase ? ssid->passphrase : "",
 			       MAC2STR(go_dev_addr),
-			       persistent ? " [PERSISTENT]" : "");
+			       persistent ? " [PERSISTENT]" : "", ip_addr);
 	}
 
 	if (persistent)

wpa_supplicant/wpa_supplicant.c

@@ -1565,6 +1565,8 @@ static void wpas_start_assoc_cb(struct wpa_radio_work *work, int deinit)
 				"disallows" : "allows");
 		}
 	}
+
+	os_memset(wpa_s->p2p_ip_addr_info, 0, sizeof(wpa_s->p2p_ip_addr_info));
 #endif /* CONFIG_P2P */
 
 #ifdef CONFIG_HS20

wpa_supplicant/wpa_supplicant_i.h

@@ -730,6 +730,7 @@ struct wpa_supplicant {
 	struct wpabuf *p2p_oob_dev_pw; /* OOB Device Password for group
 					* formation */
 	u8 p2p_peer_oob_pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
+	u8 p2p_ip_addr_info[3 * 4];
 #endif /* CONFIG_P2P */
 
 	struct wpa_ssid *bgscan_ssid;

wpa_supplicant/wpas_glue.c

@@ -948,6 +948,21 @@ void wpa_supplicant_rsn_supp_set_config(struct wpa_supplicant *wpa_s,
 		conf.ssid = ssid->ssid;
 		conf.ssid_len = ssid->ssid_len;
 		conf.wpa_ptk_rekey = ssid->wpa_ptk_rekey;
+#ifdef CONFIG_P2P
+		if (ssid->p2p_group && wpa_s->current_bss) {
+			struct wpabuf *p2p;
+			p2p = wpa_bss_get_vendor_ie_multi(wpa_s->current_bss,
+							  P2P_IE_VENDOR_TYPE);
+			if (p2p) {
+				u8 group_capab;
+				group_capab = p2p_get_group_capab(p2p);
+				if (group_capab &
+				    P2P_GROUP_CAPAB_IP_ADDR_ALLOCATION)
+					conf.p2p = 1;
+				wpabuf_free(p2p);
+			}
+		}
+#endif /* CONFIG_P2P */
 	}
 	wpa_sm_set_config(wpa_s->wpa, ssid ? &conf : NULL);
 }