[PATCH v2 05/13] blacklist: add BLACKLIST_REASON_TRANSIENT_ERROR

[James Prestwood <prestwoj@gmail.com>]

This is meant to replace the blacklist held in network objects,
known as the temporary blacklist. For these entires there is no
expiration as it will be up to network.c to remove them as it does
now internally.
---
 src/blacklist.c | 13 +++++++++++++
 src/blacklist.h | 12 ++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/src/blacklist.c b/src/blacklist.c
index ca699767..17122840 100644
--- a/src/blacklist.c
+++ b/src/blacklist.c
@@ -76,6 +76,16 @@ static struct blacklist_entry *blacklist_entry_new(const uint8_t *addr,
 		added = l_time_now();
 		expires = l_time_offset(added, blacklist_initial_timeout);
 		break;
+	case BLACKLIST_REASON_TRANSIENT_ERROR:
+		/*
+		 * The temporary blacklist is a special case where entries are
+		 * required to be removed manually. This type of blacklist is
+		 * only used for an ongoing connection attempt to iterate BSS's
+		 * and not retry until all have been exhausted.
+		 */
+		added = 0;
+		expires = 0;
+		break;
 	default:
 		l_warn("Unhandled blacklist reason: %u", reason);
 		return NULL;
@@ -96,6 +106,9 @@ static bool check_if_expired(void *data, void *user_data)
 	struct blacklist_entry *entry = data;
 	uint64_t now = l_get_u64(user_data);
 
+	if (entry->reason == BLACKLIST_REASON_TRANSIENT_ERROR)
+		return false;
+
 	if (l_time_after(now, entry->expire_time)) {
 		l_debug("Removing entry "MAC" on prune", MAC_STR(entry->addr));
 		l_free(entry);
diff --git a/src/blacklist.h b/src/blacklist.h
index a87e5eca..dc7891d1 100644
--- a/src/blacklist.h
+++ b/src/blacklist.h
@@ -26,6 +26,18 @@ enum blacklist_reason {
 	 * connect to it via autoconnect
 	 */
 	BLACKLIST_REASON_CONNECT_FAILED,
+	/*
+	 * Used to blacklist a BSS under certain failure conditions that don't
+	 * warrant a full ban from connecting. This can include an invalid
+	 * password, or an auth/assoc failure with a subset of status codes that
+	 * indicate the BSS is overloaded or cannot accept new connections.
+	 *
+	 * This is used to mark the last BSS as having failed, and to continue
+	 * iterating BSS's. Once the list has been exhausted or a connection has
+	 * succeeded all blacklist entries with this reason code should be
+	 * cleared.
+	 */
+	BLACKLIST_REASON_TRANSIENT_ERROR,
 };
 
 void blacklist_add_bss(const uint8_t *addr, enum blacklist_reason reason);
-- 
2.34.1