TCP----socket通信

标签：tcp

#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;
}

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TCP----socket通信

标签：tcp

原文地址：http://10541556.blog.51cto.com/10531556/1775369