c tcp sockt server client -- demo
server.c//
// Created by gxf on 2020/2/6.
//
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#define BUFFSIZE 1024
void dealClientConnection(int clientSocketFd);
void sendMsg2Client(int clientSocketFd);
int main(int argc, char **argv) {
int serverSocketFd, clientSocketFd, addrLength, readByteCount, i;
struct sockaddr_in serverAddress;
struct sockaddr_in clientAddress;
char recvBuff;
serverAddress.sin_family = AF_INET;
serverAddress.sin_port = htons(8000);
serverAddress.sin_addr.s_addr = INADDR_ANY;
bzero(&(serverAddress.sin_zero), 8);
addrLength = sizeof(struct sockaddr_in);
serverSocketFd = socket(AF_INET, SOCK_STREAM, 0);
while((bind(serverSocketFd, (struct sockaddr *)&serverAddress, addrLength)) == -1);
printf("Bind port 8000 success\n");
while(listen(serverSocketFd, 10) == -1);
printf("Listen port 8000 success\n");
clientSocketFd = accept(serverSocketFd, (struct sockaddr *)&clientAddress, &addrLength);
printf("Client connecting...\n");
// readByteCount = send(clientSocketFd, "hello guanxianseng", 21, 0);
dealClientConnection(clientSocketFd);
while ((readByteCount = recv(clientSocketFd, recvBuff, BUFFSIZE, 0)) > 0) {
recvBuff = '\0';
printf("receive from client:%s\n", recvBuff);
if (send(clientSocketFd, recvBuff, readByteCount, 0) < 0) {
perror("Write fail");
return 1;
}
}
close(serverSocketFd);
close(clientSocketFd);
return 0;
}
void dealClientConnection(int clientSocketFd) {
pthread_tthread;
pthread_create(&thread, NULL,sendMsg2Client, clientSocketFd);
}
void sendMsg2Client(int clientSocketFd) {
send(clientSocketFd, "hello guanxianseng", 21, 0);
printf("send msg2client\n");
}
client.c
//
// Created by gxf on 2020/2/6.
//
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#define BUFFSIZE 1024
int main(int argc, char **argv) {
int clientSocketFd, sendByteCount;
char receiveBuff;
struct sockaddr_in serverAddress;
while ((clientSocketFd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Socket fail");
sleep(1);
}
serverAddress.sin_family = AF_INET;
serverAddress.sin_port = htons(8000);
serverAddress.sin_addr.s_addr = inet_addr("127.0.0.1");
bzero(&(serverAddress.sin_zero), 8);
while (connect(clientSocketFd, (struct sockaddr *)&serverAddress, sizeof(struct sockaddr)) == -1) {
perror("Connect fail");
sleep(1);
}
printf("Connected server]\n");
sendByteCount = recv(clientSocketFd, receiveBuff, BUFFSIZE, 0);
receiveBuff = '\0';
printf("receive from server:%s\n", receiveBuff);
while (1) {
printf("Enter something:\n");
scanf("%s", receiveBuff);
send(clientSocketFd, receiveBuff, strlen(receiveBuff), 0);
sendByteCount = recv(clientSocketFd, receiveBuff, BUFFSIZE, 0);
receiveBuff = '\0';
printf("Receive from server:%s\n", receiveBuff);
}
close(clientSocketFd);
return 0;
}
文档来源：51CTO技术博客https://blog.51cto.com/u_2498536/3304162
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