#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<string.h>
int start(const char* _ip,const int _port)
{
int listen_sock=socket(AF_INET,SOCK_STREAM,0);
struct sockaddr_in local;
if(listen_sock<0){
perror("socket");
exit(1);
}
local.sin_family=AF_INET;
local.sin_port=htons(_port);
local.sin_addr.s_addr=inet_addr(_ip);
if(bind(listen_sock,(struct sockaddr*)&local,sizeof(local))<0){
perror("bind");
exit(2);
}
if(listen(listen_sock,5)<0){
perror("listen");
exit(3);
}
return listen_sock;
}
void* handler(void* arg)
{
char buf[1024];
int new_fd=(int)arg;
while(1)
{
ssize_t length=read(new_fd,buf,sizeof(buf)-1);
if(length>0)
{
buf[length]=‘\0‘;
printf("client:%s",buf);
}
else
{
printf("client close...\n");
exit(0);
}
}
}
int main(int argc,char* argv[])
{ int listen_sock;
int done=0;
if(argc!=3){
printf("%s\n",argv[0]);
return;
}
listen_sock=start(argv[1],atoi(argv[2]));
while(!done)
{
struct sockaddr_in client;
socklen_t len=sizeof(client);
int new_fd=accept(listen_sock,(struct sockaddr*)&client,&len);
if(new_fd<0){
perror("accept");
continue;
}
#ifdef _V1_
char buf[1024];
while(1)
{
ssize_t length=read(new_fd,buf,sizeof(buf)-1);
if(length>0)
{
buf[length]=‘\0‘;
printf("client:%s",buf);
}
else
{
printf("client close...\n");
exit(0);
}
}
#elif _V2_
pid_t pid=fork();
if(pid<0)
{
perror("fork");
exit(0);
}
else if(pid==0)//child
{
char buf[1024];
close(listen_sock);
while(1)
{ ssize_t length=read(new_fd,buf,sizeof(buf)-1);
if(length>0)
{
buf[length]=‘\0‘;
printf("client:%s",buf);
}
else
{
printf("client close...\n");
exit(0);
}
}
close(new_fd);
exit(0);
}
else
{
close(new_fd);
}
#elif _V3_
pthread_t tid;
if(pthread_create(&tid,NULL,handler,(void*)new_fd)!=0)
{
perror("pthread_create");
exit(0);
}
pthread_detach(tid);
#else
printf("default\n");
#endif
}
return 0;
}
#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<string.h>
#include<stdlib.h>
int main(int argc,char* argv[])
{
if(argc!=3)
{
printf("%s [ip][port]",argv[0]);
exit(0);
}
int socket_client=socket(AF_INET,SOCK_STREAM,0);
if(socket_client<0)
{
perror("socket");
exit(1);
}
struct sockaddr_in remote;
remote.sin_family=AF_INET;
remote.sin_port=htons(atoi(argv[2]));
remote.sin_addr.s_addr=inet_addr(argv[1]);
socklen_t size=sizeof(remote);
if(connect(socket_client,(struct sockaddr*)&remote,size)<0)
{
perror("connect");
exit(2);
}
char buf[1024];
while(1)
{
memset(buf,‘\0‘,sizeof(buf));
ssize_t len=read(0,buf,sizeof(buf-1));
if(len>0)
{
write(socket_client,buf,len);
}
}
return 0;
}
//双向：
#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<string.h>
int start(const char* _ip,const int _port)
{
int listen_sock=socket(AF_INET,SOCK_STREAM,0);
struct sockaddr_in local;
if(listen_sock<0){
perror("socket");
exit(1);
}
local.sin_family=AF_INET;
local.sin_port=htons(_port);
local.sin_addr.s_addr=inet_addr(_ip);
if(bind(listen_sock,(struct sockaddr*)&local,sizeof(local))<0){
perror("bind");
exit(2);
}
if(listen(listen_sock,5)<0){
perror("listen");
exit(3);
}
return listen_sock;
}
int main(int argc,char* argv[])
{
int listen_sock;
int done=0;
if(argc!=3){
printf("%s\n",argv[0]);
return;
}
listen_sock=start(argv[1],atoi(argv[2]));
while(!done)
{
struct sockaddr_in client;
socklen_t len=sizeof(client);
int new_fd=accept(listen_sock,(struct sockaddr*)&client,&len);
if(new_fd<0){
perror("accept");
continue;
}
char buf[1024];
while(1)
{
ssize_t length=read(new_fd,buf,sizeof(buf)-1);
if(length>0)
{
buf[length]=‘\0‘;
printf("client:%s",buf);
}
else
{
printf("client close...\n");
exit(0);
}
length=read(0,buf,sizeof(buf-1));
if(length>0)
{
buf[length]=‘\0‘;
write(new_fd,buf,length+1);
}
}
}
return 0;
}
#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<string.h>
#include<stdlib.h>
int main(int argc,char* argv[])
{
if(argc!=3)
{
printf("%s [ip][port]",argv[0]);
exit(0);
}
int socket_client=socket(AF_INET,SOCK_STREAM,0);
if(socket_client<0)
{
perror("socket");
exit(1);
}
struct sockaddr_in remote;
remote.sin_family=AF_INET;
remote.sin_port=htons(atoi(argv[2]));
remote.sin_addr.s_addr=inet_addr(argv[1]);
socklen_t size=sizeof(remote);
if(connect(socket_client,(struct sockaddr*)&remote,size)<0)
{
perror("connect");
exit(2);
}
char buf[1024];
while(1)
{
ssize_t len;
memset(buf,‘\0‘,sizeof(buf));
len=read(0,buf,sizeof(buf-1));
if(len>0)
{
buf[len]=‘\0‘;
write(socket_client,buf,len+1);
}
len=read(socket_client,buf,sizeof(buf)-1);
if(len>0)
{
buf[len]=‘\0‘;
printf("server:%s",buf);
}
}
return 0;
}
时间： 2024-10-05 07:32:44