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我有一个简单的服务器客户端程序，它根据从客户端收到的数据进行操作。如何计算插槽中的时间
当接收的数据是字符串start我想，直到它从客户端接收stop命令的服务器，以秒计的时间，并且作为服务器接收stop服务器发回计数秒到客户端。
我是C编程新手，我不知道如何使用time.h库。我试图使用一些命令，但得到了一些错误。
/* tcpserver.c */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/sysinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "address.h"
int main() {
int sock, connected, bytes_recieved , true = 1, number;
char send_data [1024] , recv_data[1024];
struct sockaddr_in server_addr,client_addr;
struct sysinfo info;
int sin_size;
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Socket");
exit(1);
}
if (setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(int)) == -1) {
perror("Setsockopt");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(1237);
server_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_addr.sin_zero),8);
if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr))
== -1) {
perror("Unable to bind");
exit(1);
}
if (listen(sock, 5) == -1) {
perror("Listen");
exit(1);
}
printf ("\nTCPServer Waiting for client on port 1237");
fflush(stdout);
number = 0;
while(1) {
sin_size = sizeof(struct sockaddr_in);
connected = accept(sock, (struct sockaddr *)&client_addr,&sin_size);
printf("\n I got a connection from (%s , %d)",
inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port));
send(connected, "Hello, this is simple program.", 100, 1);
while (1) {
printf("\n SEND (q or Q to quit) : ");
fgets(send_data, sizeof(send_data), stdin);
bytes_recieved = recv(connected,recv_data,1024,0);
recv_data[bytes_recieved] = '\0';
if (strcmp(favoriteDairyProduct, "start") == 0 || strcmp(favoriteDairyProduct, "START") == 0) {
// count the time until stop is recieved
}
printf("\n RECIEVED DATA = %s " , recv_data);
fflush(stdout);
send(connected, send_data,strlen(send_data), 0);
}
}
close(sock);
return 0;
}
这里是客户端代码。我想要做的另一件事是更改程序以接收多个客户端。但现在计时器更重要。
/* tcpclient.c */
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/sysinfo.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include "address.h"
#include <time.h>
int main()
{
int sock, bytes_recieved, number;
char send_data[1024],recv_data[1024];
struct hostent *host;
struct sockaddr_in server_addr;
struct sysinfo info;
host = gethostbyname("127.0.0.1");
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Socket");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(1237);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(server_addr.sin_zero),8);
if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) {
perror("Connect");
exit(1);
}
while(1) {
bytes_recieved = recv(sock,recv_data,1024,0);
recv_data[bytes_recieved] = '\0';
printf("\nRecieved data = %s " , recv_data);
printf("\nSEND (q or Q to quit) : ");
fgets(send_data, sizeof(send_data), stdin);
send(sock,send_data, sizeof(send_data), 0);
}
close(sock);
return 0;
}