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Tue, 24 Mar 2026 12:20:56 -0700 (PDT) Received: from LOCLAP699.localdomain ([152.193.78.90]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c743a938743sm10311125a12.19.2026.03.24.12.20.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Mar 2026 12:20:55 -0700 (PDT) From: James Prestwood To: iwd@lists.linux.dev Cc: James Prestwood Subject: [PATCH v2 1/4] pmksa: add pmksa_cache_flush_ssid Date: Tue, 24 Mar 2026 12:20:48 -0700 Message-Id: <20260324192051.801196-1-prestwoj@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: iwd@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adds a new flushing method to remove all PMKSA entries for a given SSID/AKM list --- src/pmksa.c | 30 ++++++++++++++++++++++++++++++ src/pmksa.h | 1 + 2 files changed, 31 insertions(+) v2: * Check AKM's as well as SSID diff --git a/src/pmksa.c b/src/pmksa.c index a50c8208..7f37f0c7 100644 --- a/src/pmksa.c +++ b/src/pmksa.c @@ -213,6 +213,36 @@ int pmksa_cache_flush(void) return 0; } +/* + * Flushes all PMKSA entries that match an SSID + */ +int pmksa_cache_flush_ssid(const uint8_t *ssid, size_t ssid_len, uint32_t akms) +{ + int i; + int used = cache.used; + int remaining = 0; + + for (i = 0; i < used; i++) { + /* Check that the both the AKM matches as well as the SSID */ + if ((cache.data[i]->akm & akms) && + !memcmp(ssid, cache.data[i]->ssid, + cache.data[i]->ssid_len)) { + pmksa_cache_free(cache.data[i]); + continue; + } + + cache.data[remaining] = cache.data[i]; + remaining += 1; + } + + cache.used = remaining; + + for (i = cache.used >> 1; i >= 0; i--) + __minheap_sift_down(cache.data, cache.used, i, &ops); + + return used - remaining; +} + int pmksa_cache_free(struct pmksa *pmksa) { if (driver_remove) diff --git a/src/pmksa.h b/src/pmksa.h index 6a624504..9f059a11 100644 --- a/src/pmksa.h +++ b/src/pmksa.h @@ -45,6 +45,7 @@ struct pmksa *pmksa_cache_get(const uint8_t spa[static 6], int pmksa_cache_put(struct pmksa *pmksa); int pmksa_cache_expire(uint64_t cutoff); int pmksa_cache_flush(void); +int pmksa_cache_flush_ssid(const uint8_t *ssid, size_t ssid_len, uint32_t akms); int pmksa_cache_free(struct pmksa *pmksa); uint64_t pmksa_lifetime(void); -- 2.34.1