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100 lines
2.6 KiB
100 lines
2.6 KiB
/*
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* Copyright (c) 2015, 2017-2018 The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __SEEMP_LOGK_STUB__
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#define __SEEMP_LOGK_STUB__
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#ifdef CONFIG_SEEMP_CORE
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#include <linux/kernel.h>
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#include <linux/seemp_api.h>
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#include <linux/socket.h>
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#define MAX_BUF_SIZE 188
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#define SEEMP_LOGK_API_SIZE sizeof(int)
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/* Write: api_id + skip encoding byte + params */
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#define SEEMP_LOGK_RECORD(api_id, format, ...) do { \
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*((int *)(buf - SEEMP_LOGK_API_SIZE)) = api_id; \
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snprintf(buf + 1, MAX_BUF_SIZE - 1, format, ##__VA_ARGS__); \
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} while (0)
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extern void *(*seemp_logk_kernel_begin)(char **buf);
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extern void (*seemp_logk_kernel_end)(void *blck);
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static inline void *seemp_setup_buf(char **buf)
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{
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void *blck;
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if (seemp_logk_kernel_begin && seemp_logk_kernel_end) {
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blck = seemp_logk_kernel_begin(buf);
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if (!*buf) {
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seemp_logk_kernel_end(blck);
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return NULL;
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}
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} else {
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return NULL;
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}
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return blck;
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}
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/*
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* NOTE: only sendto is going to be instrumented
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* since send sys call internally calls sendto
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* with 2 extra parameters
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*/
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static inline void seemp_logk_sendto(int fd, void __user *buff, size_t len,
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unsigned int flags, struct sockaddr __user *addr, int addr_len)
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{
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char *buf = NULL;
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void *blck = NULL;
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/*sets up buf and blck correctly*/
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blck = seemp_setup_buf(&buf);
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if (!blck)
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return;
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/*fill the buf*/
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SEEMP_LOGK_RECORD(SEEMP_API_kernel__sendto, "len=%u,fd=%d",
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(unsigned int)len, fd);
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seemp_logk_kernel_end(blck);
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}
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static inline void seemp_logk_rtic(__u8 type, pid_t pid, __u8 asset_id[0x20],
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__u8 asset_category, __u8 response, __u8 process_name[16])
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{
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char *buf = NULL;
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void *blck = NULL;
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blck = seemp_setup_buf(&buf);
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if (!blck)
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return;
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SEEMP_LOGK_RECORD(SEEMP_API_kernel__rtic,
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"app_pid=%d,rtic_type=%u,asset_id=%s,asset_category=%u,response=%u,process_name=%s",
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pid, type, asset_id, asset_category, response, process_name);
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seemp_logk_kernel_end(blck);
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}
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#else
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static inline void seemp_logk_sendto(int fd, void __user *buff,
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size_t len, unsigned int flags, struct sockaddr __user *addr,
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int addr_len)
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{
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}
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static inline void seemp_logk_rtic(__u8 type, __u64 actor, __u8 asset_id[0x20],
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__u8 asset_category, __u8 response)
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{
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}
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#endif
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#endif
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