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【
C
】
文件传输
作者:
tb_engineer
/ 发布于
2014/9/20
/
533
#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/socket.h> #include <netinet/in.h> #define PORT 6000 #define LISTENQ 20 #define BUFFSIZE 4096 #define FILE_NAME_MAX_SIZE 512 int main(int argc, char **argv[]) { //Input the file name char filename[FILE_NAME_MAX_SIZE]; bzero(filename,FILE_NAME_MAX_SIZE); printf("Please input the file name you wana to send:"); scanf("%s",&filename); getchar(); //Create socket int sockfd,connfd; struct sockaddr_in svraddr,clientaddr; bzero(&svraddr,sizeof(svraddr)); svraddr.sin_family=AF_INET; svraddr.sin_addr.s_addr=htonl(INADDR_ANY); svraddr.sin_port=htons(PORT); sockfd=socket(AF_INET,SOCK_STREAM,0); if(sockfd<0) { perror("socket"); exit(1); } //bind if(bind(sockfd,(struct sockaddr*)&svraddr,sizeof(svraddr))<0) { perror("bind"); exit(1); } //listen if(listen(sockfd,LISTENQ)<0) { perror("listen"); exit(1); } while(1) { socklen_t length=sizeof(clientaddr); //accept connfd=accept(sockfd,(struct sockaddr*)&clientaddr,&length); if(connfd<0) { perror("connect"); exit(1); } //send file imformation char buff[BUFFSIZE]; int count; bzero(buff,BUFFSIZE); strncpy(buff,filename,strlen(filename)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(filename)); printf("buff=[%s]\n",buff); count=send(connfd,buff,BUFFSIZE,0); if(count<0) { perror("Send file imformation"); exit(1); } //read file FILE *fd=fopen(filename,"rb"); if(fd==NULL) { printf("File :%s not found!\n",filename); } else { bzero(buff,BUFFSIZE); int file_block_length=0; while((file_block_length=fread(buff,sizeof(char),BUFFSIZE,fd))>0) { printf("file_block_length:%d\n",file_block_length); if(send(connfd,buff,file_block_length,0)<0) { perror("Send"); exit(1); } bzero(buff,BUFFSIZE); } fclose(fd); printf("Transfer file finished !\n"); } close(connfd); } close(sockfd); return 0; } client.c #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/socket.h> #include <netinet/in.h> #define PORT 6000 #define LISTENQ 20 #define BUFFSIZE 4096 #define FILE_NAME_MAX_SIZE 512 int main(int argc, char **argv[]) { int clientfd; if(argc!=2) { fprintf(stderr,"Usage:./fileclient <IP_Address>\n"); exit(1); } struct sockaddr_in clientaddr; bzero(&clientaddr,sizeof(clientaddr)); clientaddr.sin_family=AF_INET; clientaddr.sin_addr.s_addr=htons(INADDR_ANY); clientaddr.sin_port=htons(0); clientfd=socket(AF_INET,SOCK_STREAM,0); if(clientfd<0) { perror("socket"); exit(1); } if(bind(clientfd,(struct sockaddr*)&clientaddr,sizeof(clientaddr))<0) { perror("bind"); exit(1); } struct sockaddr_in svraddr; bzero(&svraddr,sizeof(svraddr)); if(inet_aton(argv[1],&svraddr.sin_addr)==0) { perror("inet_aton"); exit(1); } svraddr.sin_family=AF_INET; svraddr.sin_port=htons(PORT); socklen_t svraddrlen=sizeof(svraddr); if(connect(clientfd,(struct sockaddr*)&svraddr,svraddrlen)<0) { perror("connect"); exit(1); } //recv file imformation char buff[BUFFSIZE]; char filename[FILE_NAME_MAX_SIZE]; int count; bzero(buff,BUFFSIZE); count=recv(clientfd,buff,BUFFSIZE,0); if(count<0) { perror("recv"); exit(1); } strncpy(filename,buff,strlen(buff)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buff)); printf("Preparing recv file : %s from %s \n",filename,argv[1]); //recv file FILE *fd=fopen(filename,"wb+"); if(NULL==fd) { perror("open"); exit(1); } bzero(buff,BUFFSIZE); int length=0; while(length=recv(clientfd,buff,BUFFSIZE,0)) { if(length<0) { perror("recv"); exit(1); } int writelen=fwrite(buff,sizeof(char),length,fd); if(writelen<length) { perror("write"); exit(1); } bzero(buff,BUFFSIZE); } printf("Receieved file:%s from %s finished!\n",filename,argv[1]); fclose(fd); close(clientfd); return 0; }
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