有人可以帮助确定为什么我的服务器不能接受来自客户端的多条消息吗?
我试图让流程如下所示:
1. 客户端向服务器发送消息大小
2. 服务器接收大小并发送回响应。在这种情况下为 0。
3. 客户端检查响应,然后将消息写入服务器。
4. 服务器读取消息并打印出来。
我遇到的问题是第 4 步的 accept() 永远不会解除阻塞。
客户
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
int main(int argc, char *argv[])
{
int sock = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in s_address;
s_address.sin_family = AF_INET;
s_address.sin_port = htons(51717);
s_address.sin_addr.s_addr = INADDR_ANY;
if (connect(sock, (struct sockaddr *) &s_address, sizeof(s_address)) < 0) {
printf("ERROR: Cannot connect()\n");
exit(0);
}
char *org_msg = "Hello";
printf("Writing size of Hello\n");
char msg1[1];
msg1[0] = sizeof(org_msg);
write(sock, msg1, sizeof(msg1));
printf("Waiting for response from server\n");
struct sockaddr_in c_address;
socklen_t c_length = sizeof(c_address);
int new_sock = accept(sock, (struct sockaddr *) &c_address, &c_length);
printf("Reading response from server\n");
char stat[1];
read(new_sock, stat, 1);
if (atoi(stat) == 0) {
printf("Writing Hello to server\n");
write(sock, org_msg, sizeof(org_msg));
}
close(sock);
close(new_sock);
}
服务器
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
int main(int argc, char *argv[])
{
int sock = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in s_address;
s_address.sin_family = AF_INET;
s_address.sin_port = htons(51717);
s_address.sin_addr.s_addr = INADDR_ANY;
if (bind(sock, (struct sockaddr *) &s_address, sizeof(s_address)) < 0) {
printf("ERROR: Cannot bind()\n");
exit(0);
}
listen(sock, 3);
printf("Waiting for client message\n");
struct sockaddr_in c_address;
socklen_t c_length = sizeof(c_address);
int new_sock = accept(sock, (struct sockaddr *) &c_address, &c_length);
printf("Reading client message\n");
char msg[1];
read(new_sock, msg, 1);
printf("Writing response to client\n");
char stat[1];
stat[0] = '0';
write(new_sock, stat, sizeof(stat));
printf("Waiting for client message\n");
int new_sock2 = accept(sock, (struct sockaddr *) &c_address, &c_length);
printf("Reading client message\n");
char msg2[atoi(msg)];
read(new_sock2, msg2, sizeof(msg2));
printf("MESSAGE: %s\n", msg2);
close(sock);
close(new_sock);
close(new_sock2);
}