tcp,udp模型的服务器，客户端搭建与数据传输实现_weixin_44623669的博客-爱代码爱编程
一.TCP
1.TCP服务器搭建
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#define ERR_MSG(Msg) do{\
fprintf(stderr,"__%d__:",__LINE__);\
perror(Msg);\
}while(0)
#define IP "192.168.43.3"
#define PORT 8888
int main(int argc, const char *argv[])
{
//创建字节流式套接字
int sdp=socket(AF_INET,SOCK_STREAM,0);
if(sdp<0)
{
ERR_MSG("sdp");
return -1;
}
//允许端口被重复使用
int reuse = 1;
if(setsockopt(sdp, SOL_SOCKET, SO_REUSEADDR, &reuse ,sizeof(reuse)) < 0)
{
ERR_MSG("setsockopt");
return -1;
}
printf("允许端口快速重用\n");
sin.sin_family=AF_INET;
//将IP号和端口号绑定在套接字文件描述符
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
socklen_t addrlen=sizeof(sin);
if(bind(sdp,(struct sockaddr *)&sin,addrlen)<0)
{
ERR_MSG("bind");
return -1;
}
printf("绑定成功\n");
//将套接字设置为监听状态
if(listen(sdp,128)<0)
{
ERR_MSG("listen");
}
printf("监听成功\n");
struct sockaddr_in bin;
socklen_t addrlen1=sizeof(bin);
//生成新的文件描述符,存储链接成功的客户信息
int newsdp;
newsdp=accept(sdp,(struct sockaddr *)&bin,&addrlen1);
if(newsdp<0)
{
ERR_MSG("accept");
return -1;
}
while(1)
{
//接受数据
char buf[128];
bzero(buf,sizeof(buf));
ssize_t rcv;
rcv=recv(newsdp,buf,sizeof(buf),0);
if(rcv<0)
{
ERR_MSG("recv");
return -1;
}
if(rcv==0)
{
printf("对方客户端关闭\n");
break;
}
printf("对方客户端ip=[%s] port=%d newsdp=%d读取到的数据为%s\n",inet_ntoa(bin.sin_addr),ntohs(bin.sin_port),newsdp,buf);
//发送数据
strcat(buf,"*-*");
if(send(newsdp,buf,sizeof(buf),0)<0)
{
ERR_MSG("send");
return -1;
}
printf("发送成功\n");
}
close(sdp);
close(newsdp);
return 0;
}
2.TCP客户端搭建
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#define ERR_MSG(Msg) do{\
fprintf(stderr,"__%d__:",__LINE__);\
perror(Msg);\
}while(0)
#define SER_IP "192.168.43.3"
#define SER_PORT 8888
int main(int argc, const char *argv[])
{
//创建套接字
int cdp=socket(AF_INET,SOCK_STREAM,0);
if(cdp<0)
{
ERR_MSG("cdp");
return -1;
}
/*
//允许端口被重复使用
int reuse = 1;
if(setsockopt(sdp, SOL_SOCKET, SO_REUSEADDR, &reuse ,sizeof(reuse)) < 0)
{
ERR_MSG("setsockopt");
return -1;
}
printf("允许端口快速重用\n");
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
socklen_t addrlen=sizeof(sin);
if(bind(sdp,(struct sockaddr *)&sin,addrlen)<0)
{
ERR_MSG("bind");
return -1;
}
printf("绑定成功\n");*/
//链接服务器
//服务器的地址信息
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(SER_PORT);
sin.sin_addr.s_addr=inet_addr(SER_IP);
socklen_t addrlen=sizeof(sin);
if(connect(cdp,(struct sockaddr *)&sin,addrlen)<0)
{
ERR_MSG("connect");
}
while(1)
{
char buf[128];
bzero(buf,sizeof(buf));
//发送数据
printf("请输入数据");
fgets(buf,sizeof(buf),stdin);
buf[strlen(buf)-1]=0;
if(send(cdp,buf,sizeof(buf),0)<0)
{
ERR_MSG("send");
return -1;
}
printf("发送成功\n");
/* pthread_t tid;
pthread_create(&tid,NULL,callback,NULL);*/
//接受数据
ssize_t rcv;
rcv=recv(cdp,buf,sizeof(buf),0);
if(rcv<0)
{
ERR_MSG("recv");
return -1;
}
if(rcv==0)
{
printf("服务器关闭\n");
break;
}
printf("读取到的数据为%s\n",buf);
}
close(cdp);
return 0;
}
二.UDP
1.UDP服务器搭建
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <strings.h>
#include <string.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <unistd.h>
#define MSG_ERR(msg) do{\
printf("%d\n",__LINE__);\
perror(msg);}\
while(0)
#define PORT 6666
#define IP "192.168.43.3"
int main(int argc, const char *argv[])
{
//创建套接字文件
int sfd=socket(AF_INET,SOCK_DGRAM,0);
if(sfd<0)
{
MSG_ERR("socket");
return -1;
}
//绑定端口号
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
socklen_t addrlen=sizeof(sin);
if(bind(sfd,(struct sockaddr *)&sin,addrlen)<0)
{
MSG_ERR("bind");
}
printf("绑定成功\n");
while(1)
{
//接收数据
struct sockaddr_in cin;
socklen_t addrlen_cin=sizeof(cin);
char buf[128];
bzero(buf,sizeof(buf));
ssize_t rcv;
rcv=recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr *)&cin,&addrlen_cin);
if(rcv<0)
{
MSG_ERR("recv");
return -1;
}
if(rcv==0)
{
printf("对方客户端关闭\n");
break;
}
printf("客户端ip=%s,port=%d,接受的数据为%s\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),buf);
//发送数据
strcat(buf,"..");
if(sendto(sfd,buf,sizeof(buf),0,(struct sockaddr*)&cin,addrlen_cin)<0)
{
MSG_ERR("sendto");
}
printf("发送成功\n");
}
close(sfd);
return 0;
}
2.UDP客户端搭建
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <strings.h>
#include <string.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <unistd.h>
#define MSG_ERR(msg) do{\
printf("%d\n",__LINE__);\
perror(msg);}\
while(0)
#define PORT 6666
#define IP "192.168.43.3"
int main(int argc, const char *argv[])
{
//创建数据报式套接字文件
int sfd=socket(AF_INET,SOCK_DGRAM,0);
if(sfd<0)
{
MSG_ERR("socket");
return -1;
}
//发送到的服务器基本地址信息
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
socklen_t addrlen=sizeof(sin);
while(1)
{
//发送数据
char buf[128];
bzero(buf,sizeof(buf));
printf("请输入向服务器发送的数据");
fgets(buf,sizeof(buf),stdin);
buf[strlen(buf)-1]=0;
if(sendto(sfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,addrlen)<0)
{
MSG_ERR("sendto");
}
printf("发送成功\n");
//接收数据
struct sockaddr_in bin;
socklen_t addrlen_bin=sizeof(bin);
ssize_t rcv;
bzero(buf,sizeof(buf));
rcv=recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr *)&bin,&addrlen_bin);
if(rcv<0)
{
MSG_ERR("recv");
return -1;
}
if(rcv==0)
{
printf("对方服务器关闭\n");
break;
}
printf("接受的数据为%s\n",buf);
}
close(sfd);
return 0;
}