acl/lib_acl_cpp/samples/ssl/aio_server/main.cpp

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#include <iostream>
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#include <assert.h>
#include "lib_acl.h"
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#include "acl_cpp/stdlib/util.hpp"
#include "acl_cpp/stdlib/snprintf.hpp"
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#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
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static acl::polarssl_conf* __ssl_conf;
/**
*
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*/
class io_callback : public acl::aio_callback
{
public:
io_callback(acl::aio_socket_stream* client)
: client_(client)
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, nread_cnt_(0)
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, nread_(0)
{
}
~io_callback()
{
printf("delete io_callback now ...\r\n");
__cur_used++;
}
/**
* aio_istream
* gets/read
*
* @param data {char*}
* @param len {int} (> 0)
* @return {bool} false
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*/
bool read_wakeup()
{
acl::polarssl_io* hook = (acl::polarssl_io*) client_->get_hook();
if (hook == NULL)
{
// 非 SSL 模式,异步读取数据
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//client_->read(__timeout);
client_->gets(__timeout, false);
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return true;
}
// 尝试进行 SSL 握手
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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
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if (hook->handshake_ok())
{
// 由 reactor 模式转为 proactor 模式,从而取消
// read_wakeup 回调过程
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client_->disable_read();
// 异步读取数据,将会回调 read_callback
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//client_->read(__timeout);
client_->gets(__timeout, false);
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return true;
}
// SSL 握手还未完成,等待本函数再次被触发
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return true;
}
/**
*
* @param data {char*}
* @param len {int}
* @return {bool} true
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*/
bool read_callback(char* data, int len)
{
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nread_cnt_++;
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nread_ += len;
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if (nread_cnt_ <= 100 || nread_cnt_ % 1000 == 0)
{
char buf[256];
acl::safe_snprintf(buf, sizeof(buf),
"read len: %d, total read: %d, nread_cnt: %d",
len, nread_, nread_cnt_);
acl::meter_time(__FILE__, __LINE__, buf);
}
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// 如果远程客户端希望退出,则关闭之
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if (strncasecmp(data, "quit", 4) == 0)
{
client_->format("Bye!\r\n");
client_->close();
return true;
}
// 如果远程客户端希望服务端也关闭,则中止异步事件过程
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if (strncasecmp(data, "stop", 4) == 0)
{
client_->format("Stop now!\r\n");
client_->close(); // 关闭远程异步流
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// 通知异步引擎关闭循环过程
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client_->get_handle().stop();
}
// 向远程客户端回写收到的数据
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client_->write(data, len);
return true;
}
/**
*
* @return {bool} true
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*/
bool write_callback()
{
return true;
}
/**
*
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*/
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
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delete this;
}
/**
*
* @return {bool} true
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*/
bool timeout_callback()
{
std::cout << "Timeout, delete it ..." << std::endl;
return false;
}
private:
acl::aio_socket_stream* client_;
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int nread_cnt_;
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int nread_;
};
/**
*
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*/
class io_accept_callback : public acl::aio_accept_callback
{
public:
io_accept_callback() {}
~io_accept_callback()
{
printf(">>io_accept_callback over!\n");
}
/**
*
* @param client {aio_socket_stream*}
* @return {bool} true
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*/
bool accept_callback(acl::aio_socket_stream* client)
{
//acl_non_blocking(client->sock_handle(), ACL_BLOCKING);
// 创建异步客户端流的回调对象并与该异步流进行绑定
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io_callback* callback = new io_callback(client);
// 注册异步流的读回调过程
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client->add_read_callback(callback);
// 注册异步流的写回调过程
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client->add_write_callback(callback);
// 注册异步流的关闭回调过程
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client->add_close_callback(callback);
// 注册异步流的超时回调过程
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client->add_timeout_callback(callback);
// 当限定了行数据最大长度时
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if (__max > 0)
client->set_buf_max(__max);
// SSL 模式下,等待客户端发送握手信息
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if (__ssl_conf != NULL)
{
// 注册 SSL IO 过程的钩子
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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
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client->read_wait(__timeout);
}
// 非 SSL 模式下,从异步流读一行数据
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else
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{
//client->read(__timeout);
client->gets(__timeout, false);
}
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return true;
}
};
static void usage(const char* procname)
{
printf("usage: %s -h[help]\r\n"
" -d path_to_polarssl\r\n"
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" -l server_addr[ip:port, default: 127.0.0.1:9800]\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"
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" -M delay_ms\r\n"
" -I check_fds_inter\r\n"
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" -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
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bool use_kernel = false;
acl::string key_file, cert_file, libpath("../libpolarssl.so");
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acl::string addr("127.0.0.1:9800");
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int ch, delay_ms = 100, check_fds_inter = 10;
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while ((ch = getopt(argc, argv, "ld::hkL:t:K:C:n:M:I:")) > 0)
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{
switch (ch)
{
case 'h':
usage(argv[0]);
return 0;
case 'd':
libpath = optarg;
break;
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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;
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case 'M':
delay_ms = atoi(optarg);
break;
case 'I':
check_fds_inter = atoi(optarg);
break;
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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
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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
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__ssl_conf->enable_cache(true);
// 添加本地服务的证书
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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
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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;
}
if (__ssl_conf)
{
acl::polarssl_conf::set_libpath(libpath);
acl::polarssl_conf::load();
}
// 构建异步引擎类对象
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acl::aio_handle handle(use_kernel ? acl::ENGINE_KERNEL : acl::ENGINE_SELECT);
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handle.set_check_inter(check_fds_inter);
int delay_sec = delay_ms / 1000;
int delay_usec = (delay_ms - delay_sec * 1000) * 1000;
handle.set_delay_sec(delay_sec);
handle.set_delay_usec(delay_usec);
// 创建监听异步流
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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)
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acl::acl_cpp_init();
// 监听指定的地址
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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
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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
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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
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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
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sstream->close();
// XXX: 为了保证能关闭监听流,应在此处再 check 一下
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handle.check();
// 删除 acl::polarssl_conf 动态对象
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delete __ssl_conf;
return 0;
}