hw0921
多线程发送方
#include
int main(int argc, const char *argv[])
{
//创建流式套接字
int cfd=socket(AF_INET,SOCK_STREAM,0);
printf("socket success\n");
//填充服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(4444);
sin.sin_addr.s_addr=inet_addr("192.168.125.230");
//连接服务器
if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))<0)
{
perror("connect");
return -1;
}
printf("connect success\n");
char buf[128]="";
ssize_t res=0;
while(1)
{
bzero(buf,sizeof(buf));
printf("输入：");
scanf(" %s",buf);
// buf[strlen(buf)-1]='\0';
write(cfd,buf,sizeof(buf));
/* res=recv(cfd,buf,sizeof(buf),0);
if(res<0)
{
perror("recv");
}
else if(0==res)
{
printf("服务器链接失败\n");
break;
}
*/ printf("[192.168.122.84,4444]:%s\n",buf);
}
close(cfd);
return 0;
}
多线程接收方
#include
int main(int argc, const char *argv[])
{
//创建流式套接字
int cfd=socket(AF_INET,SOCK_STREAM,0);
printf("socket success\n");
//填充服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(4444);
sin.sin_addr.s_addr=inet_addr("192.168.125.230");
//连接服务器
if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))<0)
{
perror("connect");
return -1;
}
printf("connect success\n");
char buf[128]="";
ssize_t res=0;
while(1)
{
bzero(buf,sizeof(buf));
printf("输入：");
scanf(" %s",buf);
// buf[strlen(buf)-1]='\0';
write(cfd,buf,sizeof(buf));
/* res=recv(cfd,buf,sizeof(buf),0);
if(res<0)
{
perror("recv");
}
else if(0==res)
{
printf("服务器链接失败\n");
break;
}
*/ printf("[192.168.122.84,4444]:%s\n",buf);
}
close(cfd);
return 0;
}
ubuntu@ubuntu:TCP$ cat pth_ser.c
#include
#define PORT 4444
#define IP "192.168.125.230"
struct Climsg{
int newfd;
struct sockaddr_in cin;
};
int main(int argc, const char *argv[])
{
//创建流式套接字
int sfd=socket(AF_INET,SOCK_STREAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
//bind
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
bind(sfd,(struct sockaddr*)&sin,sizeof(sin));
printf("bind success\n");
//listen
listen(sfd,128);
//存储客户端信息0
struct sockaddr_in cin;
socklen_t addrlen=sizeof(cin);
int newfd;
pthread_t tid;
struct Climsg info;
while(1)
{
newfd=accept(sfd,(struct sockaddr*)&cin,&addrlen);
if(newfd<0)
{
perror("accept");
return -1;
}
printf("connect success\n");
printf("[%s:%d]\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
info.newfd=newfd;
info.cin=cin;
pthread_create(&tid,NULL,deal_cli_msg,(void*)&info);
pthread_detach(tid);//分离线程
}
close(sfd);
return 0;
}
void* deal_cli_msg(void *info)
{
int newfd=((struct Climsg*)info)->newfd;
struct sockaddr_in cin=((struct Climsg*)info);
char buf[128];
ssize_t res=0;
while(1)
{
bzero(buf,sizeof(buf));
//接收数据
res=recv(newfd,buf,sizeof(buf),0);
if(res<0)
{
perror("recv");
break;
}
else if(0==res)
{
printf("[%s:%d]客户端下线\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
break;
}
printf("[%s:%d]:%s\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),buf);
if(strcmp(buf,"quit")==0)
{
break;
}
//发送数据
strcat(buf,"-_-_--");
if(send(newfd,buf,sizeof(buf),0)<0)
{
perror("send");
break;
}printf("发送成功\n");
}
close(newfd);
}
多进程发送方
#include
int main(int argc, const char *argv[])
{
//创建流式套接字
int cfd=socket(AF_INET,SOCK_STREAM,0);
printf("socket success\n");
//填充服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(4444);
sin.sin_addr.s_addr=inet_addr("192.168.125.230");
//连接服务器
if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))<0)
{
perror("connect");
return -1;
}
printf("connect success\n");
char buf[128]="";
ssize_t res=0;
while(1)
{
bzero(buf,sizeof(buf));
printf("输入：");
scanf(" %s",buf);
// buf[strlen(buf)-1]='\0';
write(cfd,buf,sizeof(buf));
/* res=recv(cfd,buf,sizeof(buf),0);
if(res<0)
{
perror("recv");
}
else if(0==res)
{
printf("服务器链接失败\n");
break;
}
*/ printf("[192.168.122.84,4444]:%s\n",buf);
}
close(cfd);
return 0;
}
多线程接收方
ubuntu@ubuntu:TCP$ cat tcp_ser.c
#include
#define PORT 4444
#define IP "192.168.125.230"
void handler(int sig)
{
while(waitpid(-1,NULL,WNOHANG)>0);
return;
}
int main(int argc, const char *argv[])
{
//17信号
if(signal(SIGCHLD,handler)==SIG_ERR)
{
ERR_MSG("signal");
return -1;
}
//创建流式套接字
int sfd=socket(AF_INET,SOCK_STREAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
//bind
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
bind(sfd,(struct sockaddr*)&sin,sizeof(sin));
printf("bind success\n");
//listen
listen(sfd,128);
//存储客户端信息0
struct sockaddr_in cin;
socklen_t addrlen=sizeof(cin);
int newfd;
pid_t p;
while(1)
{
newfd=accept(sfd,(struct sockaddr*)&cin,&addrlen);
printf("1\n");
if(newfd<0)
{
perror("accept");
return -1;
}
printf("connect success\n");
printf("[%s:%d]\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
p=fork();
if(p==0)
{
//接收
char buf[128]="";
size_t res=0;
while(1)
{
bzero(buf,sizeof(buf));
res=recv(newfd,buf,sizeof(buf),0);
if(res<0)
{
perror("recv");
}
else if(0==res)
{
printf("客户端链接失败，客戶端IP：%s\n，客戶端端口：%d\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
break;
}
printf("[%s:%d]:%s\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),buf);
}
close(newfd);
exit(0);
}
close(newfd);
}
return 0;
}
广播发送方
#include
#define PORT 4444
#define IP "192.168.125.255"
int main(int argc, const char *argv[])
{
//创建流式套接字
int cfd=socket(AF_INET,SOCK_DGRAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
int a=1;
if(setsockopt(cfd,SOL_SOCKET,SO_BROADCAST,&a,sizeof(a))<0)
{
printf("setsockopt broadcast");
}
printf("a=%d\n",a);
printf("设置广播成功\n");
//服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
char buf[128]="";
ssize_t res=0;
socklen_t addrlen=sizeof(sin);
while(1)
{
//发送
bzero(buf,sizeof(buf));
printf("输入:");
scanf("%s",buf);
sendto(cfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,addrlen);
printf("发送成功\n");
//接收
/* bzero(buf,sizeof(buf));
res=recvfrom(cfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,&addrlen);
if(res<0)
{
perror("recv");
}
printf(":%s\n",buf);
*/
}
close(cfd);
return 0;
}
广播接收方
#include
#define PORT 4444
#define IP "192.168.125.255"
int main(int argc, const char *argv[])
{
//创建流式套接字
int sfd=socket(AF_INET,SOCK_DGRAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
/* int size1=0;
socklen_t len=sizeof(size1);
getsockopt(sfd,SOL_SOCKET,SO_RCVBUF,&size1,&len);
printf("size1=%d\n",size1);
*/ //bind
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(IP);
bind(sfd,(struct sockaddr*)&sin,sizeof(sin));
printf("bind success\n");
//客户端地址
struct sockaddr_in cin;
char buf[128]="";
ssize_t res=0;
socklen_t addrlen=sizeof(cin);
while(1)
{
//接收
bzero(buf,sizeof(buf));
res=recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr*)&cin,&addrlen);
if(res<0)
{
perror("recv");
}
printf(":%s\n",buf);
//与发送信息的客户端绑定
/* connect(sfd,(struct sockaddr*)&cin,addrlen);
if(strcmp(buf,"quit")==0)
{
sin.sin_family=AF_UNSPEC;
printf("断开连接\n");
}
//发送
bzero(buf,sizeof(buf));
printf("输入:");
scanf("%s",buf);
sendto(sfd,buf,sizeof(buf),0,(struct sockaddr*)&cin,addrlen);
printf("发送成功\n");
*/
}
close(sfd);
return 0;
}
组播接收方
#include
#define PORT 4444
#define GIP "224.5.5.5"
#define LIP "192.168.125.230"
int main(int argc, const char *argv[])
{
//创建流式套接字
int sfd=socket(AF_INET,SOCK_DGRAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
//加入多播组
struct ip_mreqn mq;
mq.imr_multiaddr.s_addr=inet_addr(GIP);//组播ip
mq.imr_address.s_addr=inet_addr(LIP);//本地ip
mq.imr_ifindex=2;//网络设备索引号
if(setsockopt(sfd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mq,sizeof(mq))<0)
{
perror("setsockopt(group)");
return -1;
}
printf("加入多播组[%s]成功\n",GIP);
//服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(LIP);
bind(sfd,(struct sockaddr*)&sin,sizeof(sin));
printf("绑定地址信息成功\n");
struct sockaddr_in cin;
char buf[128]="";
ssize_t res=0;
socklen_t addrlen=sizeof(cin);
while(1)
{
//接收
bzero(buf,sizeof(buf));
res=recvfrom(sfd,buf,sizeof(buf),0,(struct sockaddr*)&cin,&addrlen);
if(res<0)
{
perror("recv");
}
printf(":%s\n",buf);
}
close(sfd);
return 0;
}
组播发送方
#include
#define PORT 4444
#define GIP "224.5.5.5"
int main(int argc, const char *argv[])
{
//创建报式套接字
int cfd=socket(AF_INET,SOCK_DGRAM,0);
printf("socket success\n");
//允许端口被重复使用
int reuse=1;
setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))<0;
printf("允许端口被重复使用\n");
//服务器地址
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(PORT);
sin.sin_addr.s_addr=inet_addr(GIP);
char buf[128]="";
ssize_t res=0;
socklen_t addrlen=sizeof(sin);
while(1)
{
//发送
bzero(buf,sizeof(buf));
printf("输入:");
scanf("%s",buf);
sendto(cfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,addrlen);
printf("发送成功\n");
//接收
/* bzero(buf,sizeof(buf));
res=recvfrom(cfd,buf,sizeof(buf),0,(struct sockaddr*)&sin,&addrlen);
if(res<0)
{
perror("recv");
}
printf(":%s\n",buf);
*/
}
close(cfd);
return 0;
}