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P2P: Do not store duplicate PSK entries for the same device

Browse Source 
If a client joins a P2P group multiple times, replace the previous
per-client PSK entry instead of adding a new entry each time.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-09-01 17:47:05 +03:00
parent f2c566027e
commit 43c693c21a
1 changed files with 45 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
wpa_supplicant/p2p_supplicant.c
View File

@ -6034,6 +6034,33 @@ void wpas_p2p_continue_after_scan(struct wpa_supplicant *wpa_s)
} }
static int wpas_p2p_remove_psk_entry(struct wpa_supplicant *wpa_s,
struct wpa_ssid *s, const u8 *addr,
int iface_addr)
{
struct psk_list_entry *psk, *tmp;
int changed = 0;
dl_list_for_each_safe(psk, tmp, &s->psk_list, struct psk_list_entry,
list) {
if ((iface_addr && !psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0) ||
(!iface_addr && psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Remove persistent group PSK list entry for "
MACSTR " p2p=%u",
MAC2STR(psk->addr), psk->p2p);
dl_list_del(&psk->list);
os_free(psk);
changed++;
}
}
return changed;
}
void wpas_p2p_new_psk_cb(struct wpa_supplicant *wpa_s, const u8 *mac_addr, void wpas_p2p_new_psk_cb(struct wpa_supplicant *wpa_s, const u8 *mac_addr,
const u8 *p2p_dev_addr, const u8 *p2p_dev_addr,
const u8 *psk, size_t psk_len) const u8 *psk, size_t psk_len)
@ -6111,6 +6138,16 @@ void wpas_p2p_new_psk_cb(struct wpa_supplicant *wpa_s, const u8 *mac_addr,
os_free(last); os_free(last);
} }
wpas_p2p_remove_psk_entry(wpa_s->parent, persistent,
p2p_dev_addr ? p2p_dev_addr : mac_addr,
p2p_dev_addr == NULL);
if (p2p_dev_addr) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for p2p_dev_addr="
MACSTR, MAC2STR(p2p_dev_addr));
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for addr=" MACSTR,
MAC2STR(mac_addr));
}
dl_list_add(&persistent->psk_list, &p->list); dl_list_add(&persistent->psk_list, &p->list);
#ifndef CONFIG_NO_CONFIG_WRITE #ifndef CONFIG_NO_CONFIG_WRITE
@ -6125,33 +6162,18 @@ static void wpas_p2p_remove_psk(struct wpa_supplicant *wpa_s,
struct wpa_ssid *s, const u8 *addr, struct wpa_ssid *s, const u8 *addr,
int iface_addr) int iface_addr)
{ {
struct psk_list_entry *psk, *tmp; int res;
int changed = 0;
dl_list_for_each_safe(psk, tmp, &s->psk_list, struct psk_list_entry,
list) {
if ((iface_addr && !psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0) ||
(!iface_addr && psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Remove persistent group PSK list entry for "
MACSTR " p2p=%u",
MAC2STR(psk->addr), psk->p2p);
dl_list_del(&psk->list);
os_free(psk);
changed++;
}
}
res = wpas_p2p_remove_psk_entry(wpa_s, s, addr, iface_addr);
if (res > 0) {
#ifndef CONFIG_NO_CONFIG_WRITE #ifndef CONFIG_NO_CONFIG_WRITE
if (changed && wpa_s->conf->update_config && if (wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf)) wpa_config_write(wpa_s->confname, wpa_s->conf))
wpa_dbg(wpa_s, MSG_DEBUG, wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Failed to update configuration"); "P2P: Failed to update configuration");
#endif /* CONFIG_NO_CONFIG_WRITE */ #endif /* CONFIG_NO_CONFIG_WRITE */
} }
}
static void wpas_p2p_remove_client_go(struct wpa_supplicant *wpa_s, static void wpas_p2p_remove_client_go(struct wpa_supplicant *wpa_s,