From 8d3ceb57b8bc4378658c1ba86c73d439619e8d6b Mon Sep 17 00:00:00 2001 From: lyz Date: Fri, 18 Aug 2017 20:59:27 -0700 Subject: [PATCH] =?UTF-8?q?8-18=E8=87=AA=E4=B9=A0=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- big_little.c | 37 ++++++++++++++++++ ser_fork.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++ servertest1.c | 55 ++++++++++++++++++++++++++ 3 files changed, 197 insertions(+) create mode 100644 big_little.c create mode 100644 ser_fork.c create mode 100644 servertest1.c diff --git a/big_little.c b/big_little.c new file mode 100644 index 0000000..d562321 --- /dev/null +++ b/big_little.c @@ -0,0 +1,37 @@ +/************************************************************************* + > File Name: big_little.c + > Author: + > Mail: + > Created Time: 2017年08月18日 03时42分25秒 PDT + ************************************************************************/ + +#include +void byteorder(); +//测试大小端 +int main() +{ + byteorder(); + +} + +void byteorder() +{ + union + { + short value; + char union_bytes[sizeof(short)]; + }test; + test.value = 0x0102; + if(test.union_bytes[0] == 1 && test.union_bytes[1] == 2) + { + printf("big"); + } + else if(test.union_bytes[0] == 2 && test.union_bytes[1] == 1) + { + printf("little"); + } + else + { + printf("unknow"); + } +} diff --git a/ser_fork.c b/ser_fork.c new file mode 100644 index 0000000..39d0ed3 --- /dev/null +++ b/ser_fork.c @@ -0,0 +1,105 @@ +/************************************************************************* + > File Name: ser_fork.c + > Author: + > Mail: + > Created Time: 2017年08月16日 18时58分09秒 PDT + ************************************************************************/ +#include +#include +#include +#include +#include +#include +#include +#include +#include +int main(int argc, char *argv[]) +{ + int server_sockfd;//服务器端套接字 + int client_sockfd;//客户端套接字 + int len; + struct sockaddr_in my_addr; //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 + int sin_size; + char buf[BUFSIZ]; //数据传送的缓冲区 + memset(&my_addr,0,sizeof(my_addr)); //数据初始化--清零 + my_addr.sin_family=AF_INET; //设置为IP通信 + my_addr.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_addr.sin_port=htons(8001); //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_addr,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); + + pid_t pid, ppid; + while(1) + { + if((client_sockfd=accept(server_sockfd,(struct sockaddr *)&remote_addr,&sin_size))<0) + { + perror("accept"); + return 1; + } + else + { + send(client_sockfd,"You have connect server!", strlen("You have connect server!"), 0); + } + + //输出连接的客户端信息 + printf("\n%s: %d Login server!\n\n",inet_ntoa(remote_addr.sin_addr),ntohs(remote_addr.sin_port)); + pid = fork(); + int recvbytes; + if(pid == -1) + { + printf("fork failed!"); + } + else if(pid == 0) + { + while(1) + { + bzero(buf, 100); + if((recvbytes = recv(client_sockfd, buf, 100,0)) == -1) + { + perror("read client_sockfd failed!"); + } + else if(recvbytes != 0) + { + buf[recvbytes] = '\0'; + usleep(1000); + printf("%s: %d said: %s\n", inet_ntoa(remote_addr.sin_addr), ntohs(remote_addr.sin_port), buf); + //将客户端发送过来的消息发送回去。 + if(send(client_sockfd, buf, sizeof(buf), 0) == -1) + { + perror("send error!"); + break; + } + } + + } + } + else if(pid > 0){} + } + + /*等待客户端连接请求到达*/ + /* 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 /*接收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*/ + + close(client_sockfd); + close(server_sockfd); + return 0; +} diff --git a/servertest1.c b/servertest1.c new file mode 100644 index 0000000..5bbdb39 --- /dev/null +++ b/servertest1.c @@ -0,0 +1,55 @@ +/************************************************************************* + > File Name: clienttest1.c + > Author: + > Mail: + > Created Time: 2017年08月18日 04时04分30秒 PDT + ************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +int main(int argc, char *argv[]) +{ + if(argc <= 2) + { + printf("usage: %s ip_address port_number",argv[0]); + return 1; + } + const char *ip = argv[1]; + int port = atoi(argv[2]); + + struct sockaddr_in ser_address; + struct sockaddr_in cli_address; + + bzero(&ser_address, sizeof(ser_address)); + ser_address.sin_family = AF_INET; + inet_pton(AF_INET, ip, &ser_address.sin_addr); + ser_address.sin_port = htons(port); + + int sock = socket(AF_INET, SOCK_STREAM,0); + assert(sock != -1); + int ret = bind(sock,(struct sockaddr*)&ser_address,sizeof(ser_address)); + assert(ret != -1); + + ret = listen(sock, 5); + assert(ret != -1); + int sin_size = sizeof(cli_address); + int con = accept(sock, (struct sockaddr*)&cli_address,&sin_size); + if(con < 0) + { + printf("error！"); + return 1; + } + else + { + + } + + +