我们需要一些TCP客户端服务器代码的帮助。来自其连接调用和服务器的客户端超时不会从接受中返回。这是strace。TCP服务器接受调用不返回
strace -p 7167 -p 7168 -p 7297
Process 7167 attached - interrupt to quit
Process 7168 attached - interrupt to quit
Process 7297 attached - interrupt to quit
[pid 7167] accept(4, <unfinished ...>
[pid 7168] accept(4, <unfinished ...>
[pid 7297] connect(3, {sa_family=AF_INET, sin_port=htons(24465), sin_addr=inet_addr("215.47.142.168")}, 16
我们重新启动了系统,但问题仍然存在,即使重新启动后也会立即生效。
它可能是SYN Flood问题。我们如何处理这种关系?另外,一半的连接在监听队列(监听调用的参数2)中排队,并停止从任何客户端进一步接受,或者TCP是否仅仅阻止该特定客户端。
下面的代码...... client.all这是返回插座
int sock = socket(nmspace,style,protocol);
int ret;
struct hostent *hinfo;
if(sock<0){
printf("Error occurred while creating socket:%d\n",sock);
printf("%s\n",strerror(errno));
return -1;
}
memset(&dest, 0, sizeof(struct sockaddr_in));
hinfo = gethostbyname(rmserver);
if(hinfo == NULL)
printf("getbyname failed!\n");
dest.sin_family = AF_INET;
dest.sin_addr = *(struct in_addr *)(hinfo->h_addr);
dest.sin_port = htons(port);
ret = connect(sock, (struct sockaddr *)&dest, sizeof(struct sockaddr));
if(ret<0){
printf("Error occurred while connecting on the socket:%d\n",sock);
printf("%s\n",strerror(errno));
close(sock);
return -1;
}
服务器 使得服务器套接字函数里面......这一切是返回套接字函数内部>> >>>>
struct sockaddr_in serv;
int mysocket,r;
mysocket = socket(AF_INET, SOCK_STREAM, 0);
memset(&serv, 0, sizeof(struct sockaddr_in));
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = INADDR_ANY;
serv.sin_port = htons(port);
r = bind(mysocket, (struct sockaddr *)&serv, sizeof(struct sockaddr));
if(r<0) {
printf("Error occurred binding the socket:%d to the server port:%d\n",mysocket,port);
printf("%s",strerror(errno));
close(mysocket);
return -1;
}
r = listen(mysocket, 5);
if(r<0) {
printf("Error occurred while enabling listen on the socket:%d\n",mysocket);
printf("%s",strerror(errno));
close(mysocket);
return -1;
}
服务器接受电话>>>>>>
struct sockaddr_in dest;
int socksize=sizeof(struct sockaddr_in);
int consocket;
consocket = accept(sock, (struct sockaddr *)&dest, (socklen_t *)&socksize);
if(consocket<0) {
printf("Error occurred while accepting on the socket:%d\n",sock);
printf("%s\n",strerror(errno));
}
不使用select。我希望我们不需要,因为套接字默认是阻塞的。
欢呼声......拉曼
你能发表任何代码吗?你在使用'select'吗? – Jeff 2011-04-01 05:50:05
为您的评论添加了一些代码 – footloose 2011-04-01 16:22:15