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