104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* Copyright 2012, Samsung Telecommunications of America
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Written by William Roberts <w.roberts@sta.samsung.com>
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*/
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#pragma once
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <linux/audit.h>
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#include <linux/netlink.h>
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__BEGIN_DECLS
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#define MAX_AUDIT_MESSAGE_LENGTH 8970
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typedef enum { GET_REPLY_BLOCKING = 0, GET_REPLY_NONBLOCKING } reply_t;
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/* type == AUDIT_SIGNAL_INFO */
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struct audit_sig_info {
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uid_t uid;
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pid_t pid;
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char ctx[0];
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};
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struct audit_message {
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struct nlmsghdr nlh;
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char data[MAX_AUDIT_MESSAGE_LENGTH];
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};
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/**
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* Opens a connection to the Audit netlink socket
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* @return
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* A valid fd on success or < 0 on error with errno set.
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* Returns the same errors as man 2 socket.
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*/
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extern int audit_open(void);
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/**
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* Closes the fd returned from audit_open()
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* @param fd
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* The fd to close
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*/
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extern void audit_close(int fd);
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/**
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*
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* @param fd
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* The fd returned by a call to audit_open()
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* @param rep
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* The response struct to store the response in.
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* @param block
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* Whether or not to block on IO
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* @param peek
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* Whether or not we are to remove the message from
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* the queue when we do a read on the netlink socket.
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* @return
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* This function returns 0 on success, else -errno.
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*/
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extern int audit_get_reply(int fd, struct audit_message* rep, reply_t block,
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int peek);
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/**
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* Sets a pid to receive audit netlink events from the kernel
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* @param fd
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* The fd returned by a call to audit_open()
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* @param pid
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* The pid whom to set as the receiver of audit messages
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* @return
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* This function returns 0 on success, -errno on error.
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*/
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extern int audit_setup(int fd, pid_t pid);
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/**
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* Throttle kernel messages at the provided rate
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* @param fd
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* The fd returned by a call to audit_open()
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* @param rate
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* The rate, in messages per second, above which the kernel
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* should drop audit messages.
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* @return
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* This function returns 0 on success, -errno on error.
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*/
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extern int audit_rate_limit(int fd, uint32_t limit);
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__END_DECLS
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