c++ - linux下accept之前异常终止连接问题？
服务端代码：
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdint.h>
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <bits/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
const char* ip = "192.168.16.105";
uint16_t port = 8888;
char buff[1024];
void make_sock_noblocking(int sock_fd)
{
int flags = fcntl(sock_fd, F_GETFL, 0);
flags |= O_NONBLOCK;
fcntl(sock_fd, F_SETFL, flags);
}
int main()
{
int listen_fd = socket(PF_INET, SOCK_STREAM, 0);
struct sockaddr_in sock_addr;
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_port = htons(port);
inet_pton(AF_INET, ip, &(sock_addr.sin_addr));
int optval = 1;
setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR,
(const void *)&optval , sizeof(int));
int ret = bind(listen_fd, (sockaddr*)&sock_addr, sizeof(sock_addr));
listen(listen_fd, 1024);
make_sock_noblocking(listen_fd);
sleep(10);
struct sockaddr_in client_addr;
memset(&sock_addr, 0, sizeof(client_addr));
socklen_t len = sizeof(client_addr);
int conn_fd = accept(listen_fd, (sockaddr*)&client_addr, &(len));
printf("%d--------%s\n", conn_fd, strerror(errno));
int read_bytes = read(conn_fd, buff, sizeof(buff));
printf("%d %s\n", read_bytes, strerror(errno));
return 0;
}
客户端代码：
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdint.h>
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <bits/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
const char* ip = "192.168.16.105";
uint16_t port = 8888;
int main()
{
int sock_fd = socket(PF_INET, SOCK_STREAM, 0);
struct sockaddr_in sock_addr;
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_port = htons(port);
inet_pton(AF_INET, ip, &(sock_addr.sin_addr));
int ret = connect(sock_fd, (sockaddr*)&sock_addr, sizeof(sock_addr));
if(ret < 0)
{
printf("%s\n", strerror(errno));
}
struct linger my_linger;
memset(&my_linger, 0, sizeof(my_linger));
my_linger.l_onoff = 1;
my_linger.l_linger = 0;
setsockopt(sock_fd, SOL_SOCKET, SO_LINGER, &my_linger, sizeof(my_linger));
close(sock_fd);
return 0;
}
问题：
accpet之前sleep 10秒钟,这期间客户端向服务端发送RST终止连接，但是服务端这边还是会成功接受连接。按unp讲的不应该是返回一个ECONNABORTED(POSIX.1)错误吗？如果我把套接字的非阻塞去掉变成阻塞的话，依然可以成功接受连接，accept并不会阻塞，但是accept取出的这个socket去读的话就会出现Connection reset by peer错误了。莫非linux的实现是不管accept之前是不是被RST了，只管取出来，但取出来的这个socket再操作的话就会报错？
