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P2PS: Add intended iface address during PD for persistent group

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When persistent group is used and the peer is GO in this group,
intended interface attribute should be added to PD request/response.
Not doing so violates the spec.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Reviewed-by: Max Stepanov <Max.Stepanov@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
Andrei Otcheretianski 2015-07-02 10:45:05 +03:00 committed by Jouni Malinen
parent 23bb9828a3
commit 1f1a08b4cc
3 changed files with 36 additions and 7 deletions
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7
src/p2p/p2p.h
View file

@ -955,18 +955,21 @@ struct p2p_config {
/**
* Determine if we have a persistent group we share with remote peer
* and allocate interface for this group if needed
* @ctx: Callback context from cb_ctx
* @addr: Peer device address to search for
* @ssid: Persistent group SSID or %NULL if any
* @ssid_len: Length of @ssid
* @go_dev_addr: Buffer for returning intended GO P2P Device Address
* @go_dev_addr: Buffer for returning GO P2P Device Address
* @ret_ssid: Buffer for returning group SSID
* @ret_ssid_len: Buffer for returning length of @ssid
* @intended_iface_addr: Buffer for returning intended iface address
* Returns: 1 if a matching persistent group was found, 0 otherwise
*/
int (*get_persistent_group)(void *ctx, const u8 *addr, const u8 *ssid,
size_t ssid_len, u8 *go_dev_addr,
u8 *ret_ssid, size_t *ret_ssid_len);
u8 *ret_ssid, size_t *ret_ssid_len,
u8 *intended_iface_addr);
/**
* Get information about a possible local GO role

20
src/p2p/p2p_pd.c
View file

@ -87,6 +87,7 @@ static void p2ps_add_pd_req_attrs(struct p2p_data *p2p, struct p2p_device *dev,
u8 ssid[SSID_MAX_LEN];
size_t ssid_len;
u8 go_dev_addr[ETH_ALEN];
u8 intended_addr[ETH_ALEN];
/* If we might be explicite group owner, add GO details */
if (prov->conncap & (P2PS_SETUP_GROUP_OWNER |
@ -101,7 +102,7 @@ static void p2ps_add_pd_req_attrs(struct p2p_data *p2p, struct p2p_device *dev,
if (p2p->cfg->get_persistent_group) {
shared_group = p2p->cfg->get_persistent_group(
p2p->cfg->cb_ctx, dev->info.p2p_device_addr, NULL, 0,
go_dev_addr, ssid, &ssid_len);
go_dev_addr, ssid, &ssid_len, intended_addr);
}
/* Add Operating Channel if conncap includes GO */
@ -149,9 +150,15 @@ static void p2ps_add_pd_req_attrs(struct p2p_data *p2p, struct p2p_device *dev,
p2p_buf_add_feature_capability(buf, sizeof(feat_cap_mask),
feat_cap_mask);
if (shared_group)
if (shared_group) {
p2p_buf_add_persistent_group_info(buf, go_dev_addr,
ssid, ssid_len);
/* Add intended interface address if it is not added yet */
if ((prov->conncap == P2PS_SETUP_NONE ||
prov->conncap == P2PS_SETUP_CLIENT) &&
!is_zero_ether_addr(intended_addr))
p2p_buf_add_intended_addr(buf, intended_addr);
}
}
@ -296,15 +303,20 @@ static struct wpabuf * p2p_build_prov_disc_resp(struct p2p_data *p2p,
u8 ssid[SSID_MAX_LEN];
size_t ssid_len;
u8 go_dev_addr[ETH_ALEN];
u8 intended_addr[ETH_ALEN];
persist = p2p->cfg->get_persistent_group(
p2p->cfg->cb_ctx,
dev->info.p2p_device_addr,
persist_ssid, persist_ssid_len, go_dev_addr,
ssid, &ssid_len);
if (persist)
ssid, &ssid_len, intended_addr);
if (persist) {
p2p_buf_add_persistent_group_info(
buf, go_dev_addr, ssid, ssid_len);
if (!is_zero_ether_addr(intended_addr))
p2p_buf_add_intended_addr(
buf, intended_addr);
}
}
if (!persist && (prov->conncap & P2PS_SETUP_GROUP_OWNER))

16
wpa_supplicant/p2p_supplicant.c
View file

@ -3508,7 +3508,8 @@ static void wpas_presence_resp(void *ctx, const u8 *src, u8 status,
static int wpas_get_persistent_group(void *ctx, const u8 *addr, const u8 *ssid,
size_t ssid_len, u8 *go_dev_addr,
u8 *ret_ssid, size_t *ret_ssid_len)
u8 *ret_ssid, size_t *ret_ssid_len,
u8 *intended_iface_addr)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *s;
@ -3518,6 +3519,19 @@ static int wpas_get_persistent_group(void *ctx, const u8 *addr, const u8 *ssid,
os_memcpy(ret_ssid, s->ssid, s->ssid_len);
*ret_ssid_len = s->ssid_len;
os_memcpy(go_dev_addr, s->bssid, ETH_ALEN);
if (s->mode != WPAS_MODE_P2P_GO) {
os_memset(intended_iface_addr, 0, ETH_ALEN);
} else if (wpas_p2p_create_iface(wpa_s)) {
if (wpas_p2p_add_group_interface(wpa_s, WPA_IF_P2P_GO))
return 0;
os_memcpy(intended_iface_addr,
wpa_s->pending_interface_addr, ETH_ALEN);
} else {
os_memcpy(intended_iface_addr, wpa_s->own_addr,
ETH_ALEN);
}
return 1;
}