1.tcp实现通信

服务器：

//tcp服务端#include <head.h>#define SERPORT 8888
#define IP "192.168.125.6"int main(int argc, const char *argv[])
{ //1.创建套接字int sfd=socket(AF_INET,SOCK_STREAM,0);//2.绑定struct sockaddr_in ser;ser.sin_family=AF_INET;ser.sin_port=htons(SERPORT);ser.sin_addr.s_addr=inet_addr(IP);bind(sfd,(struct sockaddr*)&ser,sizeof(ser));printf("服务器已上线!\n");//3.监听listen(sfd,128);printf("开始监听客户端连接情况>>>>>\n");//4.接收客户端地址消息结构体struct sockaddr_in cli;socklen_t socklen=sizeof(cli);int newfd=accept(sfd,(struct sockaddr*)&cli,&socklen);printf("客户:[%s: %d]连接成功\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port));//5.收发数据char buf[128]="";while(1){bzero(buf,sizeof(buf));recv(newfd,buf,sizeof(buf),0);printf("[%s: %d]:%s\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port),buf);if(strcmp(buf,"quit")==0){printf("客户[%s: %d]已下线!\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port));break;}}//6.关闭套接字close(newfd);close(sfd);return 0;
}

客户端：

//tcp客户端#include <head.h>#define PORT 8888
#define IP "192.168.125.6"int main(int argc, const char *argv[])
{ //1.创建套接字int cfd=socket(AF_INET,SOCK_STREAM,0);//2.连接服务端struct sockaddr_in ser;ser.sin_family=AF_INET;ser.sin_port=htons(PORT);ser.sin_addr.s_addr=inet_addr(IP);connect(cfd,(struct sockaddr*)&ser,sizeof(ser));printf("已连接服务器!\n");//3.收发数据char buf[128]="";while(1){bzero(buf,sizeof(buf));printf("请输入内容:");fgets(buf,sizeof(buf),stdin);buf[strlen(buf)-1]='\0';send(cfd,buf,sizeof(buf),0);if(strcmp(buf,"quit")==0)break;}//4.关闭套接字close(cfd);return 0;
}

效果：

2.udp实现通信

服务器：

//udp服务器#include <head.h>#define PORT 9999
#define IP "192.168.125.6"int main(int argc, const char *argv[])
{ //1.创建套接字int sfd=socket(AF_INET,SOCK_DGRAM,0);//2.绑定服务器struct sockaddr_in ser;ser.sin_family=AF_INET;ser.sin_port=htons(PORT);ser.sin_addr.s_addr=inet_addr(IP);bind(sfd,(struct sockaddr*)&ser,sizeof(ser));printf("服务器已上线! 等待连接中>>>>>\n");//3.收发数据char buf[128]="";struct sockaddr_in cli;socklen_t socklen=sizeof(cli);while(1){bzero(buf,sizeof(buf));recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr*)&cli,&socklen);printf("客户[%s: %d]:%s\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port),buf);if(strcmp(buf,"quit")==0){printf("客户[%s: %d]已下线!\n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port));break;}}//4.关闭套接字close(sfd);return 0;
}

客户端：

//udp客户端#include <head.h>#define PORT 9999
#define IP "192.168.125.6"int main(int argc, const char *argv[])
{ //1.创建套接字int cfd=socket(AF_INET,SOCK_DGRAM,0);//2.收发数据char buf[128]="";struct sockaddr_in ser;ser.sin_family=AF_INET;ser.sin_port=htons(PORT);ser.sin_addr.s_addr=inet_addr(IP);while(1){bzero(buf,sizeof(buf));fgets(buf,sizeof(buf),stdin);buf[strlen(buf)-1]='\0';sendto(cfd,buf,sizeof(buf),0,(struct sockaddr*)&ser,sizeof(ser));if(strcmp(buf,"quit")==0)break;}//3.关闭套接字close(cfd);return 0;
}

效果：