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+/*
+ * Copyright (c) 2010 Tomas Mraz <tmraz@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions. (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * faillock.h - authentication failure data file record structure
+ *
+ * Each record in the file represents an instance of login failure of
+ * the user at the recorded time.
+ */
+
+
+#ifndef _FAILLOCK_H
+#define _FAILLOCK_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#define TALLY_STATUS_VALID 0x1 /* the tally file entry is valid */
+#define TALLY_STATUS_RHOST 0x2 /* the source is rhost */
+#define TALLY_STATUS_TTY 0x4 /* the source is tty */
+/* If neither TALLY_FLAG_RHOST nor TALLY_FLAG_TTY are set the source is service. */
+
+struct tally {
+ char source[52]; /* rhost or tty of the login failure */
+ /* (not necessarily NULL terminated) */
+ uint16_t reserved; /* reserved for future use */
+ uint16_t status; /* record status */
+ uint64_t time; /* time of the login failure */
+};
+/* 64 bytes per entry */
+
+struct tally_data {
+ struct tally *records; /* array of tallies */
+ unsigned int count; /* number of records */
+};
+
+#define FAILLOCK_DEFAULT_TALLYDIR "/var/run/faillock"
+#define FAILLOCK_DEFAULT_CONF "/etc/security/faillock.conf"
+
+int open_tally(const char *dir, const char *user, uid_t uid, int create);
+int read_tally(int fd, struct tally_data *tallies);
+int update_tally(int fd, struct tally_data *tallies);
+#endif