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P2PS: Refactor p2p_data::query_hash and p2p_data::query_count use

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Avoid using p2p_data::query_hash for both Probe Request frame processing
and for hashes specified by p2p_find. It's resolved by use of local
query_hash and query_count variables in p2p_reply_probe().

Since p2p_data::query_hash is used only for seek hash values rename
p2p_data::query_hash to p2ps_seek_hash.

Delete p2p_data::query_count since it's not needed anymore.

Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
Max Stepanov 2015-06-10 11:43:46 +03:00 committed by Jouni Malinen
parent 866eb800e5
commit e12c4004e4
4 changed files with 34 additions and 30 deletions
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51
src/p2p/p2p.c
View file

@ -297,7 +297,7 @@ static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
return;
}
ies = p2p_build_probe_resp_ies(p2p);
ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
if (ies == NULL)
return;
@ -346,7 +346,7 @@ int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
return 0;
}
ies = p2p_build_probe_resp_ies(p2p);
ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
if (ies == NULL)
return -1;
@ -1198,9 +1198,8 @@ int p2p_find(struct p2p_data *p2p, unsigned int timeout,
p2p->p2ps_seek = 1;
} else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
u8 buf[P2PS_HASH_LEN];
int i;
int i, count = 0;
p2p->p2ps_seek_count = seek_count;
for (i = 0; i < seek_count; i++) {
if (!p2ps_gen_hash(p2p, seek[i], buf))
continue;
@ -1208,13 +1207,16 @@ int p2p_find(struct p2p_data *p2p, unsigned int timeout,
/* If asking for wildcard, don't do others */
if (os_memcmp(buf, p2p->wild_card_hash,
P2PS_HASH_LEN) == 0) {
p2p->p2ps_seek_count = 0;
count = 0;
break;
}
os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
P2PS_HASH_LEN);
os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
buf, P2PS_HASH_LEN);
count++;
}
p2p->p2ps_seek_count = count;
p2p->p2ps_seek = 1;
} else {
p2p->p2ps_seek_count = 0;
@ -1224,7 +1226,8 @@ int p2p_find(struct p2p_data *p2p, unsigned int timeout,
/* Special case to perform wildcard search */
if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
p2p->p2ps_seek_count = 1;
os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
P2PS_HASH_LEN);
}
p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
@ -2159,7 +2162,9 @@ int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
}
struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
const u8 *query_hash,
u8 query_count)
{
struct wpabuf *buf;
u8 *len;
@ -2174,7 +2179,7 @@ struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
if (p2p->query_count)
if (query_count)
extra += MAX_SVC_ADV_IE_LEN;
buf = wpabuf_alloc(1000 + extra);
@ -2211,9 +2216,8 @@ struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
p2p_buf_add_device_info(buf, p2p, NULL);
p2p_buf_update_ie_hdr(buf, len);
if (p2p->query_count) {
p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
p2p->query_hash,
if (query_count) {
p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
p2p->p2ps_adv_list);
}
@ -2253,6 +2257,8 @@ p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
struct ieee80211_mgmt *resp;
struct p2p_message msg;
struct wpabuf *ies;
u8 query_hash[P2P_MAX_QUERY_HASH * P2PS_HASH_LEN];
u8 query_count;
u8 channel, op_class;
if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
@ -2305,13 +2311,13 @@ p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
return P2P_PREQ_NOT_P2P;
}
query_count = 0;
if (msg.service_hash && msg.service_hash_count) {
const u8 *hash = msg.service_hash;
u8 *dest = p2p->query_hash;
u8 *dest = query_hash;
u8 i;
int p2ps_svc_found = 0;
p2p->query_count = 0;
for (i = 0; i < msg.service_hash_count; i++) {
if (p2p_service_find_asp(p2p, hash)) {
p2ps_svc_found = 1;
@ -2320,21 +2326,21 @@ p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
P2PS_HASH_LEN)) {
/* We found match(es) but wildcard
* will return all */
p2p->query_count = 1;
os_memcpy(p2p->query_hash, hash,
query_count = 1;
os_memcpy(query_hash, hash,
P2PS_HASH_LEN);
break;
}
/* Save each matching hash */
if (p2p->query_count < P2P_MAX_QUERY_HASH) {
if (query_count < P2P_MAX_QUERY_HASH) {
os_memcpy(dest, hash, P2PS_HASH_LEN);
dest += P2PS_HASH_LEN;
p2p->query_count++;
query_count++;
} else {
/* We found match(es) but too many to
* return all */
p2p->query_count = 0;
query_count = 0;
break;
}
}
@ -2350,7 +2356,6 @@ p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
}
} else {
/* This is not a P2PS Probe Request */
p2p->query_count = 0;
p2p_dbg(p2p, "No P2PS Hash in Probe Request");
if (!p2p->in_listen || !p2p->drv_in_listen) {
@ -2395,7 +2400,7 @@ p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
* really only used for discovery purposes, not to learn exact BSS
* parameters.
*/
ies = p2p_build_probe_resp_ies(p2p);
ies = p2p_build_probe_resp_ies(p2p, query_hash, query_count);
if (ies == NULL)
return P2P_PREQ_NOT_PROCESSED;
@ -2468,8 +2473,6 @@ p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
p2p->query_count = 0;
if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
return res;

4
src/p2p/p2p_build.c
View file

@ -353,10 +353,10 @@ void p2p_buf_add_service_hash(struct wpabuf *buf, struct p2p_data *p2p)
/* Service Hash */
wpabuf_put_u8(buf, P2P_ATTR_SERVICE_HASH);
wpabuf_put_le16(buf, p2p->p2ps_seek_count * P2PS_HASH_LEN);
wpabuf_put_data(buf, p2p->query_hash,
wpabuf_put_data(buf, p2p->p2ps_seek_hash,
p2p->p2ps_seek_count * P2PS_HASH_LEN);
wpa_hexdump(MSG_DEBUG, "P2P: * Service Hash",
p2p->query_hash, p2p->p2ps_seek_count * P2PS_HASH_LEN);
p2p->p2ps_seek_hash, p2p->p2ps_seek_count * P2PS_HASH_LEN);
}

2
src/p2p/p2p_dev_disc.c
View file

@ -314,7 +314,7 @@ void p2p_process_go_disc_req(struct p2p_data *p2p, const u8 *da, const u8 *sa,
p2p_dbg(p2p, "Received GO Discoverability Request - remain awake for 100 TU");
ies = p2p_build_probe_resp_ies(p2p);
ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
if (ies == NULL)
return;

7
src/p2p/p2p_i.h
View file

@ -514,9 +514,8 @@ struct p2p_data {
struct p2ps_advertisement *p2ps_adv_list;
struct p2ps_provision *p2ps_prov;
u8 wild_card_hash[P2PS_HASH_LEN];
u8 query_hash[P2P_MAX_QUERY_HASH * P2PS_HASH_LEN];
u8 query_count;
u8 p2ps_seek;
u8 p2ps_seek_hash[P2P_MAX_QUERY_HASH * P2PS_HASH_LEN];
u8 p2ps_seek_count;
#ifdef CONFIG_WIFI_DISPLAY
@ -848,7 +847,9 @@ void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer);
int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps);
int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
size_t num_req_dev_type);
struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p);
struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
const u8 *query_hash,
u8 query_count);
void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len);
int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid, const u8 *buf,