From c0eea479aa505089b1284821dc15a8a0afea3929 Mon Sep 17 00:00:00 2001 From: macbook-pro <3101158440@qq.com> Date: Mon, 18 Dec 2023 06:23:29 +0800 Subject: [PATCH] use ggg --- cc.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ccc.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ss.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++ sss.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 283 insertions(+) create mode 100644 cc.c create mode 100644 ccc.c create mode 100644 ss.c create mode 100644 sss.c diff --git a/cc.c b/cc.c new file mode 100644 index 0000000..172a7c9 --- /dev/null +++ b/cc.c @@ -0,0 +1,74 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +int main(int argc, char *argv[]) +{ + int sockfd = 0, n = 0; + char recvBuff[1024]; + struct sockaddr_in serv_addr; + + if(argc != 2) + { + printf("\n Usage: %s \n",argv[0]); + return 1; + } + + memset(recvBuff, '0',sizeof(recvBuff)); + + /* a socket is created through call to socket() function */ + if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) + { + printf("\n Error : Could not create socket \n"); + return 1; + } + + memset(&serv_addr, '0', sizeof(serv_addr)); + + serv_addr.sin_family = AF_INET; + serv_addr.sin_port = htons(5000); + + if(inet_pton(AF_INET, argv[1], &serv_addr.sin_addr)<=0) + { + printf("\n inet_pton error occured\n"); + return 1; + } + + /* Information like IP address of the remote host and its port is + * bundled up in a structure and a call to function connect() is made + * which tries to connect this socket with the socket (IP address and port) + * of the remote host + */ + if( connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) + { + printf("\n Error : Connect Failed \n"); + return 1; + } + + /* Once the sockets are connected, the server sends the data (date+time) + * on clients socket through clients socket descriptor and client can read it + * through normal read call on the its socket descriptor. + */ + while ( (n = read(sockfd, recvBuff, sizeof(recvBuff)-1)) > 0) + { + recvBuff[n] = 0; + if(fputs(recvBuff, stdout) == EOF) + { + printf("\n Error : Fputs error\n"); + } + } + + if(n < 0) + { + printf("\n Read error \n"); + } + + return 0; +} diff --git a/ccc.c b/ccc.c new file mode 100644 index 0000000..a3a2377 --- /dev/null +++ b/ccc.c @@ -0,0 +1,73 @@ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +int main(int argc, const char * argv[]) { + // insert code here... + printf("Hello, World!\n"); + + int client_sockfd; + int len; + struct sockaddr_in remota_addr; //服务器端网络地址结构体 + char buf[BUFSIZ]; //数据传送的缓冲区 + memset(&remota_addr,0,sizeof(remota_addr)); //数据初始化--清零 + remota_addr.sin_family = AF_INET; //设置为IPV4通信 + remota_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); + remota_addr.sin_port = htons(8000); //服务器端口号 + + //创建客户端套接字--Ipv4协议，面向连接通信，TCP协议 + //成功，返回0 ，失败返回-1 + if ((client_sockfd=socket(PF_INET, SOCK_STREAM, 0))<0) { + perror("socket"); + return 1; + } + + //将套接字绑定到服务器的网络地址上 + if (connect(client_sockfd, (struct sockaddr *)&remota_addr, sizeof(struct sockaddr))<0) { + perror("connect"); + return 1; + } + + printf("connect to server\n"); + + len = recv(client_sockfd, buf, BUFSIZ, 0); //接受服务器端消息 + buf[len]='/0'; + printf("%s",buf); //打印服务器端消息 + + //循环的发送信息并打印接受消息--recv返回接收到的字节数，send返回发送的字节数 + while (1) { + memset(buf,0,sizeof(buf)); + + printf("Enter string to send"); + scanf("%s",buf); + // if (!strcmp(buf,"quit")) { + // break; + // } + + len=send(client_sockfd,buf,strlen(buf),0); + memset(buf,0,sizeof(buf)); + + len=recv(client_sockfd,buf,BUFSIZ,0); + buf[len]='\0'; + printf("received:%s\n",buf); + if(buf[0]=='q'){ + break; + } + + } + + close(client_sockfd); + + return 0; +} + diff --git a/ss.c b/ss.c new file mode 100644 index 0000000..186dd61 --- /dev/null +++ b/ss.c @@ -0,0 +1,63 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +int main(int argc, char *argv[]) +{ + int listenfd = 0, connfd = 0; + struct sockaddr_in serv_addr; + + char sendBuff[1025]; + time_t ticks; + + /* creates an UN-named socket inside the kernel and returns + * an integer known as socket descriptor + * This function takes domain/family as its first argument. + * For Internet family of IPv4 addresses we use AF_INET + */ + listenfd = socket(AF_INET, SOCK_STREAM, 0); + memset(&serv_addr, '0', sizeof(serv_addr)); + memset(sendBuff, '0', sizeof(sendBuff)); + + serv_addr.sin_family = AF_INET; + serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); + serv_addr.sin_port = htons(5000); + + /* The call to the function "bind()" assigns the details specified + * in the structure 『serv_addr' to the socket created in the step above + */ + bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)); + + /* The call to the function "listen()" with second argument as 10 specifies + * maximum number of client connections that server will queue for this listening + * socket. + */ + listen(listenfd, 10); + + while(1) + { + /* In the call to accept(), the server is put to sleep and when for an incoming + * client request, the three way TCP handshake* is complete, the function accept() + * wakes up and returns the socket descriptor representing the client socket. + */ + connfd = accept(listenfd, (struct sockaddr*)NULL, NULL); + + /* As soon as server gets a request from client, it prepares the date and time and + * writes on the client socket through the descriptor returned by accept() + */ + ticks = time(NULL); + snprintf(sendBuff, sizeof(sendBuff), "%.24s\r\n", ctime(&ticks)); + write(connfd, sendBuff, strlen(sendBuff)); + + close(connfd); + sleep(1); + } +} + diff --git a/sss.c b/sss.c new file mode 100644 index 0000000..15f489a --- /dev/null +++ b/sss.c @@ -0,0 +1,73 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +int main(int argc, const char * argv[]) { + // insert code here... + printf("Hello, World!\n"); + + int server_sockfd; //服务端套接字 + int client_sockfd; //客户端套接字 + int len; + struct sockaddr_in my_add; //服务器网络地址结构体 + struct sockaddr_in remote_addr; //客户端网络地址结构体 + socklen_t sin_size; + char buf[BUFSIZ]; //数据传送的缓冲区 + memset(&my_add,0,sizeof(my_add)); //数据初始化--清零 + my_add.sin_family = AF_INET; //设置为IP通信 + my_add.sin_addr.s_addr = INADDR_ANY; //服务器IP地址--允许连接到所有本地地址上 + my_add.sin_port = htons(8000); //服务器端口号 + + //创建服务器端套接字--IPV4协议 ，面向连接通信，TCP协议 + if((server_sockfd=socket(PF_INET, SOCK_STREAM, 0))<0) { + perror("socket"); + return 1; + } + + //将套接字绑定到服务器的网络地址上 + if (bind(server_sockfd, (struct sockaddr *)&my_add, sizeof(struct sockaddr))<0) { + perror("bind"); + return 1; + } + + //监听连接请求--监听队列长度为5 + listen(server_sockfd, 5); + sin_size = sizeof(struct sockaddr_in); + + //等待客户端连接请求到达 + if ((client_sockfd=accept(server_sockfd, (struct sockaddr *)&remote_addr, &sin_size))<0) { + perror("accept"); + return 1; + } + + printf("accept client %s\n",inet_ntoa(remote_addr.sin_addr)); + len = send(client_sockfd, "welcome to my server\n", 21, 0); //发送欢迎信息 + + //接受客户端的数据并将其发送给客户端--recv返回接收到的字节数，send返回发送的字节数 + while (1) { + memset(buf,0,sizeof(buf)); + len = recv(client_sockfd, buf, BUFSIZ, 0); + send(client_sockfd,buf, len, 0); + buf[len]='\0'; + printf("receive:%s\n",buf); + if(buf[0]=='q'){ + send(client_sockfd,'q', 1, 0); + break; + } + } + + close(client_sockfd); + close(server_sockfd); + + return 0; +} +