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f-stack/app/micro_thread/mt_sys_hook.cpp

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/**
* Tencent is pleased to support the open source community by making MSEC available.
*
* Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the GNU General Public License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* https://opensource.org/licenses/GPL-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
/**
* @filename mt_sys_hook.cpp
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdarg.h>
#include "micro_thread.h"
#include "mt_sys_hook.h"
#include "ff_hook.h"
using namespace NS_MICRO_THREAD;
#define MT_HOOK_MAX_FD 65535*2
#define MT_FD_FLG_INUSE 0x1
#define MT_FD_FLG_UNBLOCK 0x2
typedef struct socket_hook_info
{
int sock_flag;
int read_timeout;
int write_timeout;
}MtHookFd;
MtSyscallFuncTab g_mt_syscall_tab;
int g_mt_hook_flag;
int g_ff_hook_flag;
static MtHookFd g_mt_hook_fd_tab[MT_HOOK_MAX_FD];
MtHookFd* mt_hook_find_fd(int fd)
{
if ((fd < 0) || (fd >= MT_HOOK_MAX_FD)) {
return NULL;
}
MtHookFd* fd_info = &g_mt_hook_fd_tab[fd];
if (!(fd_info->sock_flag & MT_FD_FLG_INUSE)) {
return NULL;
} else {
return fd_info;
}
}
void mt_hook_new_fd(int fd)
{
if ((fd < 0) || (fd >= MT_HOOK_MAX_FD)) {
return;
}
MtHookFd* fd_info = &g_mt_hook_fd_tab[fd];
fd_info->sock_flag = MT_FD_FLG_INUSE;
fd_info->read_timeout = 500;
fd_info->write_timeout = 500;
}
void mt_hook_free_fd(int fd)
{
if ((fd < 0) || (fd >= MT_HOOK_MAX_FD)) {
return;
}
MtHookFd* fd_info = &g_mt_hook_fd_tab[fd];
fd_info->sock_flag = 0;
fd_info->read_timeout = 0;
fd_info->write_timeout = 0;
}
#ifdef __cplusplus
extern "C" {
#endif
int ioctl(int fd, unsigned long cmd, ...)
{
va_list ap;
va_start(ap, cmd);
void* arg = va_arg(ap, void *);
va_end(ap);
mt_hook_syscall(ioctl);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return ff_hook_ioctl(fd, cmd, arg);
}
if (cmd == FIONBIO)
{
int flags = (arg != NULL) ? *((int*)arg) : 0;
if (flags != 0) {
hook_fd->sock_flag |= MT_FD_FLG_UNBLOCK;
}
}
return ff_hook_ioctl(fd, cmd, arg);
}
int socket(int domain, int type, int protocol)
{
mt_hook_syscall(socket);
if (!ff_hook_active())
{
return mt_real_func(socket)(domain, type, protocol);
}
int fd = ff_hook_socket(domain, type, protocol);
if (fd < 0)
{
return fd;
}
mt_hook_new_fd(fd);
mt_hook_syscall(ioctl);
int nb = 1;
ff_hook_ioctl(fd, FIONBIO, &nb);
return fd;
}
int close(int fd)
{
mt_hook_syscall(close);
if (!ff_hook_active())
{
return mt_real_func(close)(fd);
}
mt_hook_free_fd(fd);
return ff_hook_close(fd);
}
int connect(int fd, const struct sockaddr *address, socklen_t address_len)
{
mt_hook_syscall(connect);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(connect)(fd, address, address_len);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_connect(fd, address, address_len);
}
return MtFrame::connect(fd, address, (int)address_len, hook_fd->write_timeout);
}
ssize_t read(int fd, void *buf, size_t nbyte)
{
mt_hook_syscall(read);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(read)(fd, buf, nbyte);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_read(fd, buf, nbyte);
}
return MtFrame::read(fd, buf, nbyte, hook_fd->read_timeout);
}
ssize_t write(int fd, const void *buf, size_t nbyte)
{
mt_hook_syscall(write);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(write)(fd, buf, nbyte);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_write(fd, buf, nbyte);
}
return MtFrame::write(fd, buf, nbyte, hook_fd->write_timeout);
}
ssize_t sendto(int fd, const void *message, size_t length, int flags,
const struct sockaddr *dest_addr, socklen_t dest_len)
{
mt_hook_syscall(sendto);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(sendto)(fd, message, length, flags, dest_addr, dest_len);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_sendto(fd, message, length, flags, dest_addr, dest_len);
}
return MtFrame::sendto(fd, message, (int)length, flags,
dest_addr, dest_len, hook_fd->write_timeout);
}
ssize_t recvfrom(int fd, void *buffer, size_t length, int flags,
struct sockaddr *address, socklen_t *address_len)
{
mt_hook_syscall(recvfrom);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(recvfrom)(fd, buffer, length, flags, address, address_len);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_recvfrom(fd, buffer, length, flags, address, address_len);
}
return MtFrame::recvfrom(fd, buffer, length, flags, address, address_len, hook_fd->read_timeout);
}
ssize_t recv(int fd, void *buffer, size_t length, int flags)
{
mt_hook_syscall(recv);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(recv)(fd, buffer, length, flags);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_recv(fd, buffer, length, flags);
}
return MtFrame::recv(fd, buffer, length, flags, hook_fd->read_timeout);
}
ssize_t send(int fd, const void *buf, size_t nbyte, int flags)
{
mt_hook_syscall(send);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(send)(fd, buf, nbyte, flags);
}
if (hook_fd->sock_flag & MT_FD_FLG_UNBLOCK)
{
return ff_hook_send(fd, buf, nbyte, flags);
}
return MtFrame::send(fd, buf, nbyte, flags, hook_fd->write_timeout);
}
int setsockopt(int fd, int level, int option_name, const void *option_value, socklen_t option_len)
{
mt_hook_syscall(setsockopt);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(setsockopt)(fd, level, option_name, option_value, option_len);
}
if (SOL_SOCKET == level)
{
struct timeval *val = (struct timeval*)option_value;
if (SO_RCVTIMEO == option_name)
{
hook_fd->read_timeout = val->tv_sec * 1000 + val->tv_usec / 1000;
}
else if (SO_SNDTIMEO == option_name)
{
hook_fd->write_timeout = val->tv_sec * 1000 + val->tv_usec / 1000;
}
}
return ff_hook_setsockopt(fd, level, option_name, option_value, option_len);
}
int fcntl(int fd, int cmd, ...)
{
va_list ap;
va_start(ap, cmd);
void* arg = va_arg(ap, void *);
va_end(ap);
mt_hook_syscall(fcntl);
MtHookFd* hook_fd = mt_hook_find_fd(fd);
if (!mt_hook_active() || !hook_fd || !ff_hook_active())
{
return mt_real_func(fcntl)(fd, cmd, arg);
}
if (cmd == F_SETFL)
{
va_start(ap, cmd);
int flags = va_arg(ap, int);
va_end(ap);
if (flags & O_NONBLOCK)
{
hook_fd->sock_flag |= MT_FD_FLG_UNBLOCK;
}
}
return ff_hook_fcntl(fd, cmd, arg);
}
int listen(int sockfd, int backlog)
{
mt_hook_syscall(listen);
if (!ff_hook_active())
{
return mt_real_func(listen)(sockfd, backlog);
}
return ff_hook_listen(sockfd, backlog);
}
int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
{
mt_hook_syscall(bind);
if (!ff_hook_active())
{
return mt_real_func(bind)(sockfd, addr, addrlen);
}
return ff_hook_bind(sockfd, addr, addrlen);
}
int accept(int fd, struct sockaddr *addr, socklen_t *addrlen)
{
mt_hook_syscall(accept);
if (!ff_hook_active())
{
return mt_real_func(accept)(fd, addr, addrlen);
}
return ff_hook_accept(fd, addr, addrlen);
}
#ifdef __cplusplus
}
#endif
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