本文实例讲述了C语言实现Linux下的socket文件传输。分享给大家供大家参考。具体如下：
server.c如下：
//////////////////////////////////// //服务器代码 /////////////////////////////////// //本文件是服务器的代码 #include <netinet/in.h> // for sockaddr_in #include <sys/types.h> // for socket #include <sys/socket.h> // for socket #include <stdio.h> // for printf #include <stdlib.h> // for exit #include <string.h> // for bzero #include <time.h> //for time_t and time #define HELLO_WORLD_SERVER_PORT 7754 #define LENGTH_OF_LISTEN_QUEUE 20 #define BUFFER_SIZE 1024 int main(int argc, char **argv) { //设置一个socket地址结构server_addr,代表服务器internet地址, 端口 struct sockaddr_in server_addr; bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0 server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = htons(INADDR_ANY); server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); // time_t now; FILE *stream; //创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket int server_socket = socket(AF_INET,SOCK_STREAM,0); if( server_socket < 0) { printf("Create Socket Failed!"); exit(1); } //把socket和socket地址结构联系起来 if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr))) { printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT); exit(1); } //server_socket用于监听 if ( listen(server_socket, LENGTH_OF_LISTEN_QUEUE) ) { printf("Server Listen Failed!"); exit(1); } while (1) //服务器端要一直运行 { struct sockaddr_in client_addr; socklen_t length = sizeof(client_addr); int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length); if ( new_server_socket < 0) { printf("Server Accept Failed!n"); break; } char buffer[BUFFER_SIZE]; bzero(buffer, BUFFER_SIZE); strcpy(buffer,"Hello,World! 从服务器来！"); strcat(buffer,"n"); //C语言字符串连接 send(new_server_socket,buffer,BUFFER_SIZE,0); bzero(buffer,BUFFER_SIZE); //接收客户端发送来的信息到buffer中 length = recv(new_server_socket,buffer,BUFFER_SIZE,0); if (length < 0) { printf("Server Recieve Data Failed!n"); exit(1); } printf("n%s",buffer); if((stream = fopen("data1","r"))==NULL) { printf("The file 'data1' was not opened! n"); exit(1); } else printf("The file 'filename' was opened! n"); bzero(buffer,BUFFER_SIZE); int lengsize = 0; while((lengsize = fread(buffer,1,1024,stream)) > 0) { printf("lengsize = %dn",lengsize); if(send(new_server_socket,buffer,lengsize,0)<0) { printf("Send File is Failedn"); break; } bzero(buffer, BUFFER_SIZE); } if(fclose(stream)) printf("The file 'data' was not closed! n"); exit(1); //关闭与客户端的连接 close(new_server_socket); } //关闭监听用的socket close(server_socket); return 0; }
client.c如下：
//////////////////////////////////// //客户端代码 /////////////////////////////////// //本文件是客户机的代码 #include <netinet/in.h> // for sockaddr_in #include <sys/types.h> // for socket #include <sys/socket.h> // for socket #include <stdio.h> // for printf #include <stdlib.h> // for exit #include <string.h> // for bzero #include <time.h> //for time_t and time #include <arpa/inet.h> #define HELLO_WORLD_SERVER_PORT 7754 #define BUFFER_SIZE 1024 int main(int argc, char **argv) { if (argc != 2) { printf("Usage: ./%s ServerIPAddressn",argv[0]); exit(1); } //time_t now; FILE *stream; //设置一个socket地址结构client_addr,代表客户机internet地址, 端口 struct sockaddr_in client_addr; bzero(&client_addr,sizeof(client_addr)); //把一段内存区的内容全部设置为0 client_addr.sin_family = AF_INET; //internet协议族 client_addr.sin_addr.s_addr = htons(INADDR_ANY);//INADDR_ANY表示自动获取本机地址 client_addr.sin_port = htons(0); //0表示让系统自动分配一个空闲端口 //创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket int client_socket = socket(AF_INET,SOCK_STREAM,0); if( client_socket < 0) { printf("Create Socket Failed!n"); exit(1); } //把客户机的socket和客户机的socket地址结构联系起来 if( bind(client_socket,(struct sockaddr*)&client_addr,sizeof(client_addr))) { printf("Client Bind Port Failed!n"); exit(1); } //设置一个socket地址结构server_addr,代表服务器的internet地址, 端口 struct sockaddr_in server_addr; bzero(&server_addr,sizeof(server_addr)); server_addr.sin_family = AF_INET; if(inet_aton(argv[1],&server_addr.sin_addr) == 0) //服务器的IP地址来自程序的参数 { printf("Server IP Address Error!n"); exit(1); } server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); socklen_t server_addr_length = sizeof(server_addr); //向服务器发起连接,连接成功后client_socket代表了客户机和服务器的一个socket连接 if(connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length) < 0) { printf("Can Not Connect To %s!n",argv[1]); exit(1); } char buffer[BUFFER_SIZE]; bzero(buffer,BUFFER_SIZE); //从服务器接收数据到buffer中 int length = recv(client_socket,buffer,BUFFER_SIZE,0); if(length < 0) { printf("Recieve Data From Server %s Failed!n", argv[1]); exit(1); } printf("n%sn",buffer); bzero(buffer,BUFFER_SIZE); bzero(buffer,BUFFER_SIZE); strcpy(buffer,"Hello, World! From Clientn"); //向服务器发送buffer中的数据 send(client_socket,buffer,BUFFER_SIZE,0); if((stream = fopen("data","w+t"))==NULL) { printf("The file 'data' was not opened! n"); } else bzero(buffer,BUFFER_SIZE); length = 0; while( length = recv(client_socket,buffer,BUFFER_SIZE,0)) { if(length < 0) { printf("Recieve Data From Server %s Failed!n", argv[1]); break; } int write_length = fwrite(buffer,sizeof(char),length,stream); if (write_length<length) { printf("File is Write Failedn"); break; } bzero(buffer,BUFFER_SIZE); } printf("Recieve File From Server[%s] Finishedn", argv[1]); //关闭 文件 fclose(stream); //关闭socket close(client_socket); return 0; }
希望本文所述对大家的C语言程序设计有所帮助。
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