linux c账户安全性,linux c flash安全策略

àì夳堔傛蜴生んèń 2022-10-20 05:23 162阅读 0赞

flash的socket安全策略机制默认端口为843,需要服务器在这个端口响应请求并返回信息；代码如下：

\#include

void accept\_cb(int fd, short events, void\* arg);

void socket\_read\_cb(int fd, short events, void \*arg);

int tcp\_server\_init(int port, int listen\_num);

int main(int argc, char\*\* argv)

int listener = tcp\_server\_init(843, 10);

if( listener == -1 )

perror(" tcp\_server\_init error ");

return -1;

struct event\_base\* base = event\_base\_new();

//添加监听客户端请求连接事件

struct event\* ev\_listen = event\_new(base, listener, EV\_READ | EV\_PERSIST, accept\_cb, base);

event\_add(ev\_listen, NULL);

event\_base\_dispatch(base);

return 0;

void accept\_cb(int fd, short events, void\* arg)

evutil\_socket\_t sockfd;

struct sockaddr\_in client;

socklen\_t len;

sockfd = accept(fd, (struct sockaddr\*)&client, &len );

evutil\_make\_socket\_nonblocking(sockfd);

printf("accept a client %d\\n", sockfd);

struct event\_base\* base = (struct event\_base\*)arg;

//仅仅是为了动态创建一个event结构体

struct event \*ev = event\_new(NULL, -1, 0, NULL, NULL);

//将动态创建的结构体作为event的回调参数

event\_assign(ev, base, sockfd, EV\_READ | EV\_PERSIST, socket\_read\_cb, (void\*)ev);

event\_add(ev, NULL);

void socket\_read\_cb(int fd, short events, void \*arg)

char msg\[4096\];

struct event \*ev = (struct event\*)arg;

int len = read(fd, msg, sizeof(msg) - 1);

msg\[len\] = '\\0';

char \*reply\_msg = "<?xml version=\\"1.0\\"?>";

if(strcmp(msg, "") == 0)\{

printf("recv the client msg: %s\\r\\n", msg);

printf("%s\\r\\n", reply\_msg);

write(fd, reply\_msg, strlen(reply\_msg) );

close(event\_get\_fd(ev));

event\_free(ev);

return ;

if( len <= 0 )

printf("some error happen when read\\n");

close(event\_get\_fd(ev));

event\_free(ev);

return ;

typedef struct sockaddr SA;

int tcp\_server\_init(int port, int listen\_num)

int errno\_save;

evutil\_socket\_t listener;

listener = socket(AF\_INET, SOCK\_STREAM, 0);

if( listener == -1 )

return -1;

//允许多次绑定同一个地址。要用在socket和bind之间

evutil\_make\_listen\_socket\_reuseable(listener);

struct sockaddr\_in sin;

sin.sin\_family = AF\_INET;

sin.sin\_addr.s\_addr = 0;

sin.sin\_port = htons(port);

if(bind(listener, (SA\*)&sin, sizeof(sin)) < 0 )

goto error;

if(listen(listener, listen\_num) < 0)

goto error;

//跨平台统一接口，将套接字设置为非阻塞状态

evutil\_make\_socket\_nonblocking(listener);

return listener;

error:

errno\_save = errno;

evutil\_closesocket(listener);

errno = errno\_save;

return -1;

2.编译后执行就ok!

gcc -Wall  -I/usr/local/include event.c -L/usr/local/lib -levent

linux c账户安全性,linux c flash安全策略

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