acl/lib_acl_cpp/samples/aio/aio_server_ssl/main.cpp

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#include <iostream>
#include <assert.h>
#include "lib_acl.h"
#include "acl_cpp/acl_cpp_init.hpp"
#include "acl_cpp/stdlib/log.hpp"
#include "acl_cpp/stream/polarssl_conf.hpp"
#include "acl_cpp/stream/polarssl_io.hpp"
#include "acl_cpp/stream/aio_handle.hpp"
#include "acl_cpp/stream/aio_istream.hpp"
#include "acl_cpp/stream/aio_listen_stream.hpp"
#include "acl_cpp/stream/aio_socket_stream.hpp"
static int __max = 0;
static int __timeout = 0;
static int __max_used = 0;
static int __cur_used = 0;
// SSL 模式下的 SSL 配置对象
static acl::polarssl_conf* __ssl_conf;
/**
* 延迟读回调处理类
*/
class timer_reader: public acl::aio_timer_reader
{
public:
timer_reader(int delay)
{
delay_ = delay;
printf("timer_reader init, delay: %d\r\n", delay);
}
~timer_reader()
{
}
// aio_timer_reader 的子类必须重载 destroy 方法
void destroy()
{
printf("timer_reader delete, delay: %d\r\n", delay_);
delete this;
}
// 重载基类回调方法
virtual void timer_callback(unsigned int id)
{
printf("timer_reader(%d): delay: %d\r\n", id, delay_);
// 调用基类的处理过程
aio_timer_reader::timer_callback(id);
}
private:
int delay_;
};
/**
* 延迟写回调处理类
*/
class timer_writer: public acl::aio_timer_writer
{
public:
timer_writer(int delay)
{
delay_ = delay;
printf("timer_writer init, delay: %d\r\n", delay);
}
~timer_writer()
{
}
// aio_timer_reader 的子类必须重载 destroy 方法
void destroy()
{
printf("timer_writer delete, delay: %d\r\n", delay_);
delete this;
}
// 重载基类回调方法
virtual void timer_callback(unsigned int id)
{
printf("timer_writer(%d): timer_callback, delay: %d\r\n",
id, delay_);
// 调用基类的处理过程
aio_timer_writer::timer_callback(id);
}
private:
int delay_;
};
/**
* 异步客户端流的回调类的子类
*/
class io_callback : public acl::aio_callback
{
public:
io_callback(acl::aio_socket_stream* client)
: client_(client)
, i_(0)
{
}
~io_callback()
{
printf("delete io_callback now ...\r\n");
__cur_used++;
}
/**
* 读回调虚函数,该回调函数当满足了类 aio_istream 实例中的
* gets/read 的可读条件后被调用,由异步框架内部将符合条件的数
* 据读出,直接传递给用户的子类
* @param data {char*} 读到的数据的指针地址
* @param len {int} 读到的数据长度(> 0)
* @return {bool} 该函数返回 false 通知异步引擎关闭该异步流
*/
bool read_wakeup()
{
acl::polarssl_io* hook = (acl::polarssl_io*) client_->get_hook();
if (hook == NULL)
{
// 非 SSL 模式,异步读取一行数据
client_->gets(__timeout, false);
return true;
}
// 尝试进行 SSL 握手
if (hook->handshake() == false)
{
printf("ssl handshake failed\r\n");
return false;
}
// 如果 SSL 握手已经成功,则开始按行读数据
if (hook->handshake_ok())
{
// 由 reactor 模式转为 proactor 模式,从而取消
// read_wakeup 回调过程
client_->disable_read();
// 异步读取一行
client_->gets(__timeout, false);
return true;
}
// SSL 握手还未完成,等待本函数再次被触发
return true;
}
/**
* 实现父类中的虚函数,客户端流的读成功回调过程
* @param data {char*} 读到的数据地址
* @param len {int} 读到的数据长度
* @return {bool} 返回 true 表示继续,否则希望关闭该异步流
*/
bool read_callback(char* data, int len)
{
i_++;
//if (i_ < 10)
// std::cout << ">>gets(i:" << i_ << "): "
// << data << std::endl;
// 如果远程客户端希望退出,则关闭之
if (strncasecmp(data, "quit", 4) == 0)
{
client_->format("Bye!\r\n");
client_->close();
}
// 如果远程客户端希望服务端也关闭,则中止异步事件过程
else if (strncasecmp(data, "stop", 4) == 0)
{
client_->format("Stop now!\r\n");
client_->close(); // 关闭远程异步流
// 通知异步引擎关闭循环过程
client_->get_handle().stop();
}
// 向远程客户端回写收到的数据
int delay = 0;
if (strncasecmp(data, "write_delay", strlen("write_delay")) == 0)
{
// 延迟写过程
const char* ptr = data + strlen("write_delay");
delay = atoi(ptr);
if (delay > 0)
{
std::cout << ">> write delay " << delay
<< " second ..." << std::endl;
timer_writer* timer = new timer_writer(delay);
client_->write(data, len, delay * 1000000, timer);
client_->gets(10, false);
return (true);
}
}
else if (strncasecmp(data, "read_delay", strlen("read_delay")) == 0)
{
// 延迟读过程
const char* ptr = data + strlen("read_delay");
delay = atoi(ptr);
if (delay > 0)
{
client_->write(data, len);
std::cout << ">> read delay " << delay
<< " second ..." << std::endl;
timer_reader* timer = new timer_reader(delay);
client_->gets(10, false, delay * 1000000, timer);
return (true);
}
}
client_->write(data, len);
//client_->gets(10, false);
return (true);
}
/**
* 实现父类中的虚函数,客户端流的写成功回调过程
* @return {bool} 返回 true 表示继续,否则希望关闭该异步流
*/
bool write_callback()
{
return (true);
}
/**
* 实现父类中的虚函数,客户端流的超时回调过程
*/
void close_callback()
{
// 必须在此处删除该动态分配的回调类对象以防止内存泄露
delete this;
}
/**
* 实现父类中的虚函数,客户端流的超时回调过程
* @return {bool} 返回 true 表示继续,否则希望关闭该异步流
*/
bool timeout_callback()
{
std::cout << "Timeout, delete it ..." << std::endl;
return (false);
}
private:
acl::aio_socket_stream* client_;
int i_;
};
/**
* 异步监听流的回调类的子类
*/
class io_accept_callback : public acl::aio_accept_callback
{
public:
io_accept_callback() {}
~io_accept_callback()
{
printf(">>io_accept_callback over!\n");
}
/**
* 基类虚函数,当有新连接到达后调用此回调过程
* @param client {aio_socket_stream*} 异步客户端流
* @return {bool} 返回 true 以通知监听流继续监听
*/
bool accept_callback(acl::aio_socket_stream* client)
{
// 创建异步客户端流的回调对象并与该异步流进行绑定
io_callback* callback = new io_callback(client);
// 注册异步流的读回调过程
client->add_read_callback(callback);
// 注册异步流的写回调过程
client->add_write_callback(callback);
// 注册异步流的关闭回调过程
client->add_close_callback(callback);
// 注册异步流的超时回调过程
client->add_timeout_callback(callback);
// 当限定了行数据最大长度时
if (__max > 0)
client->set_buf_max(__max);
// SSL 模式下,等待客户端发送握手信息
if (__ssl_conf != NULL)
{
// 注册 SSL IO 过程的钩子
acl::polarssl_io* ssl = new
acl::polarssl_io(*__ssl_conf, true, true);
if (client->setup_hook(ssl) == ssl)
{
std::cout << "setup_hook error" << std::endl;
ssl->destroy();
return false;
}
// 将客户端置于读监听状态以触发 read_wakeup 回调过程,
// SSL 握手过程将在 read_wakeup 中完成
client->read_wait(__timeout);
}
// 非 SSL 模式下,从异步流读一行数据
else
client->gets(__timeout, false);
return (true);
}
};
static void usage(const char* procname)
{
printf("usage: %s -h[help]\r\n"
" -l server_addr[ip:port, default: 127.0.0.1:9001]\r\n"
" -L line_max_length\r\n"
" -t timeout\r\n"
" -n conn_used_limit\r\n"
" -k[use kernel event: epoll/iocp/kqueue/devpool]\r\n"
" -K ssl_key_file -C ssl_cert_file [in SSL mode]\r\n",
procname);
}
int main(int argc, char* argv[])
{
// 事件引擎是否采用内核中的高效模式
bool use_kernel = false;
acl::string key_file, cert_file;
acl::string addr("127.0.0.1:9001");
int ch;
while ((ch = getopt(argc, argv, "l:hkL:t:K:C:n:")) > 0)
{
switch (ch)
{
case 'h':
usage(argv[0]);
return (0);
case 'l':
addr = optarg;
break;
case 'k':
use_kernel = true;
break;
case 'L':
__max = atoi(optarg);
break;
case 't':
__timeout = atoi(optarg);
break;
case 'K':
key_file = optarg;
break;
case 'C':
cert_file = optarg;
break;
case 'n':
__max_used = atoi(optarg);
break;
default:
break;
}
}
acl::log::stdout_open(true);
// 当私钥及证书都存在时才采用 SSL 通信方式
if (!key_file.empty() && !cert_file.empty())
{
__ssl_conf = new acl::polarssl_conf();
// 允许服务端的 SSL 会话缓存功能
__ssl_conf->enable_cache(true);
// 添加本地服务的证书
if (__ssl_conf->add_cert(cert_file.c_str()) == false)
{
delete __ssl_conf;
__ssl_conf = NULL;
std::cout << "add_cert error: " << cert_file.c_str()
<< std::endl;
}
// 添加本地服务密钥
else if (__ssl_conf->set_key(key_file.c_str()) == false)
{
delete __ssl_conf;
__ssl_conf = NULL;
std::cout << "set_key error: " << key_file.c_str()
<< std::endl;
}
else
std::cout << "Load cert&key OK!" << std::endl;
}
// 构建异步引擎类对象
acl::aio_handle handle(use_kernel ? acl::ENGINE_KERNEL : acl::ENGINE_SELECT);
// 创建监听异步流
acl::aio_listen_stream* sstream = new acl::aio_listen_stream(&handle);
// 初始化ACL库(尤其是在WIN32下一定要调用此函数在UNIX平台下可不调用)
acl::acl_cpp_init();
// 监听指定的地址
if (sstream->open(addr.c_str()) == false)
{
std::cout << "open " << addr.c_str() << " error!" << std::endl;
sstream->close();
// XXX: 为了保证能关闭监听流,应在此处再 check 一下
handle.check();
getchar();
return (1);
}
// 创建回调类对象,当有新连接到达时自动调用此类对象的回调过程
io_accept_callback callback;
sstream->add_accept_callback(&callback);
std::cout << "Listen: " << addr.c_str() << " ok!" << std::endl;
while (true)
{
// 如果返回 false 则表示不再继续,需要退出
if (handle.check() == false)
{
std::cout << "aio_server stop now ..." << std::endl;
break;
}
if (__max_used > 0 && __cur_used >= __max_used)
break;
}
// 关闭监听流并释放流对象
sstream->close();
// XXX: 为了保证能关闭监听流,应在此处再 check 一下
handle.check();
// 删除 acl::polarssl_conf 动态对象
delete __ssl_conf;
return (0);
}