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Convert RSN pre-authentication to use struct dl_list

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This commit is contained in:
Jouni Malinen 2010-01-06 21:23:15 +02:00
parent 1ce77dcc66
commit c5b26e33c1
3 changed files with 33 additions and 43 deletions
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66
src/rsn_supp/preauth.c
View File

@ -1,6 +1,6 @@
/*
* WPA Supplicant - RSN pre-authentication
* Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
* RSN pre-authentication (supplicant)
* Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -31,7 +31,7 @@
struct rsn_pmksa_candidate {
struct rsn_pmksa_candidate *next;
struct dl_list list;
u8 bssid[ETH_ALEN];
int priority;
};
@ -43,18 +43,14 @@ struct rsn_pmksa_candidate {
*/
void pmksa_candidate_free(struct wpa_sm *sm)
{
struct rsn_pmksa_candidate *entry, *prev;
struct rsn_pmksa_candidate *entry, *n;
if (sm == NULL)
return;
entry = sm->pmksa_candidates;
sm->pmksa_candidates = NULL;
while (entry) {
prev = entry;
entry = entry->next;
os_free(prev);
}
dl_list_for_each_safe(entry, n, &sm->pmksa_candidates,
struct rsn_pmksa_candidate, list)
os_free(entry);
}
@ -292,9 +288,9 @@ void rsn_preauth_deinit(struct wpa_sm *sm)
*/
void rsn_preauth_candidate_process(struct wpa_sm *sm)
{
struct rsn_pmksa_candidate *candidate;
struct rsn_pmksa_candidate *candidate, *n;
if (sm->pmksa_candidates == NULL)
if (dl_list_empty(&sm->pmksa_candidates))
return;
/* TODO: drop priority for old candidate entries */
@ -311,9 +307,9 @@ void rsn_preauth_candidate_process(struct wpa_sm *sm)
return; /* invalid state for new pre-auth */
}
while (sm->pmksa_candidates) {
dl_list_for_each_safe(candidate, n, &sm->pmksa_candidates,
struct rsn_pmksa_candidate, list) {
struct rsn_pmksa_cache_entry *p = NULL;
candidate = sm->pmksa_candidates;
p = pmksa_cache_get(sm->pmksa, candidate->bssid, NULL);
if (os_memcmp(sm->bssid, candidate->bssid, ETH_ALEN) != 0 &&
(p == NULL || p->opportunistic)) {
@ -321,7 +317,7 @@ void rsn_preauth_candidate_process(struct wpa_sm *sm)
"candidate " MACSTR
" selected for pre-authentication",
MAC2STR(candidate->bssid));
sm->pmksa_candidates = candidate->next;
dl_list_del(&candidate->list);
rsn_preauth_init(sm, candidate->bssid,
sm->eap_conf_ctx);
os_free(candidate);
@ -336,7 +332,7 @@ void rsn_preauth_candidate_process(struct wpa_sm *sm)
wpa_sm_add_pmkid(sm, candidate->bssid, p->pmkid);
}
sm->pmksa_candidates = candidate->next;
dl_list_del(&candidate->list);
os_free(candidate);
}
wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: no more pending PMKSA "
@ -358,7 +354,7 @@ void rsn_preauth_candidate_process(struct wpa_sm *sm)
void pmksa_candidate_add(struct wpa_sm *sm, const u8 *bssid,
int prio, int preauth)
{
struct rsn_pmksa_candidate *cand, *prev, *pos;
struct rsn_pmksa_candidate *cand, *pos;
if (sm->network_ctx && sm->proactive_key_caching)
pmksa_cache_get_opportunistic(sm->pmksa, sm->network_ctx,
@ -372,18 +368,13 @@ void pmksa_candidate_add(struct wpa_sm *sm, const u8 *bssid,
/* If BSSID already on candidate list, update the priority of the old
* entry. Do not override priority based on normal scan results. */
prev = NULL;
cand = sm->pmksa_candidates;
while (cand) {
if (os_memcmp(cand->bssid, bssid, ETH_ALEN) == 0) {
if (prev)
prev->next = cand->next;
else
sm->pmksa_candidates = cand->next;
cand = NULL;
dl_list_for_each(pos, &sm->pmksa_candidates,
struct rsn_pmksa_candidate, list) {
if (os_memcmp(pos->bssid, bssid, ETH_ALEN) == 0) {
cand = pos;
break;
}
prev = cand;
cand = cand->next;
}
if (cand) {
@ -399,19 +390,16 @@ void pmksa_candidate_add(struct wpa_sm *sm, const u8 *bssid,
/* Add candidate to the list; order by increasing priority value. i.e.,
* highest priority (smallest value) first. */
prev = NULL;
pos = sm->pmksa_candidates;
while (pos) {
if (cand->priority <= pos->priority)
dl_list_for_each(pos, &sm->pmksa_candidates,
struct rsn_pmksa_candidate, list) {
if (cand->priority <= pos->priority) {
dl_list_add(pos->list.prev, &cand->list);
cand = NULL;
break;
prev = pos;
pos = pos->next;
}
}
cand->next = pos;
if (prev)
prev->next = cand;
else
sm->pmksa_candidates = cand;
if (cand)
dl_list_add_tail(&sm->pmksa_candidates, &cand->list);
wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: added PMKSA cache "
"candidate " MACSTR " prio %d", MAC2STR(bssid), prio);

1
src/rsn_supp/wpa.c
View File

@ -1809,6 +1809,7 @@ struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
sm = os_zalloc(sizeof(*sm));
if (sm == NULL)
return NULL;
dl_list_init(&sm->pmksa_candidates);
sm->renew_snonce = 1;
sm->ctx = ctx;

9
src/rsn_supp/wpa_i.h
View File

@ -1,6 +1,6 @@
/*
* wpa_supplicant - Internal WPA state machine definitions
* Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
* Internal WPA/RSN supplicant state machine definitions
* Copyright (c) 2004-2010, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -15,7 +15,8 @@
#ifndef WPA_I_H
#define WPA_I_H
struct rsn_pmksa_candidate;
#include "utils/list.h"
struct wpa_peerkey;
struct wpa_eapol_key;
@ -38,7 +39,7 @@ struct wpa_sm {
struct rsn_pmksa_cache *pmksa; /* PMKSA cache */
struct rsn_pmksa_cache_entry *cur_pmksa; /* current PMKSA entry */
struct rsn_pmksa_candidate *pmksa_candidates;
struct dl_list pmksa_candidates;
struct l2_packet_data *l2_preauth;
struct l2_packet_data *l2_preauth_br;