【FTP服务器之】客户端c语言代码

被动方式——下载文件：

#include <stdio.h>#include <string.h>#include <errno.h>#include <unistd.h>#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netdb.h>#include <arpa/inet.h>#include <netinet/in.h>#include <sys/stat.h>#include <fcntl.h>#define MAXLINE 128int open_config(char *ip){int p,i,length;char *port=NULL;FILE* fp_config;fp_config=fopen("config.txt","r");if(fp_config<0){perror("open file error");exit(1);}getline(&port,&length,fp_config);i=strlen(port);port[i-1]='\0';getline(&ip,&length,fp_config);i=strlen(ip);ip[i-1]='\0';p=atoi(port);return p;}int sock(int p){int control_sock;struct hostent *hp;struct sockaddr_in server,server_data;char read_buf[MAXLINE];memset(&server,0,sizeof(struct sockaddr_in));control_sock=socket(AF_INET,SOCK_STREAM,0);inet_pton(AF_INET,"192.168.16.144",&server.sin_addr);server.sin_family=AF_INET;server.sin_port=htons(p);connect(control_sock,(struct sockaddr *)&server,sizeof(server));bzero(&read_buf,sizeof(read_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);return control_sock;}int sock1(int port_data){int data_sock;struct hostent *hp;struct sockaddr_in server,server_data;char read_buf[MAXLINE];memset(&server,0,sizeof(struct sockaddr_in));data_sock=socket(AF_INET,SOCK_STREAM,0);inet_pton(AF_INET,"192.168.16.144",&server.sin_addr);server.sin_family=AF_INET;server.sin_port=htons(port_data);connect(data_sock,(struct sockaddr *)&server,sizeof(server));return data_sock;}int ch_port(char *read_buf){int n;char *token;char num[6][10];int m=0,i=0;n=strlen(read_buf);read_buf[n-2]=',';token=strtok(read_buf,",");while((token=strtok(NULL,","))!=NULL){strcpy(num[i],token);i++;}m=atoi(num[3])*256+atoi(num[4]);printf("port=%d\n",m);return m;}void login(int control_sock){char username[MAXLINE];char password[MAXLINE];char read_buf[MAXLINE];char send_buf[MAXLINE];/*username*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);printf("please input username: ");scanf("%s",username);sprintf(send_buf,"USER %s\r\n",username);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*password*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);printf("please input password: ");scanf("%s",password);sprintf(send_buf,"PASS %s\r\n",password);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);}int PASV(int control_sock){char read_buf[MAXLINE];char send_buf[MAXLINE];int port_data;bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"PASV\r\n");write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);port_data=ch_port(read_buf);return port_data;}void down_file(int control_sock,int data_sock){char read_buf[MAXLINE];char send_buf[MAXLINE];char filename[20];int fd,ret;char *dirname="ftp_download";//char *dirname="/srv/ftp/download";/*for ubuntu*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"CWD %s\r\n",dirname);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*SIZE filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);bzero(filename,20);printf("please input filename: ");scanf("%s",filename);//printf("%s\n",filename);sprintf(send_buf,"SIZE %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*RETR filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"RETR %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*client create filename and download file*/fd=open(filename,O_RDWR|O_TRUNC|O_CREAT,0777);if(fd<0){perror("open file error");exit(1);}while((ret=read(data_sock,read_buf,MAXLINE))>0){write(fd,read_buf,ret);bzero(read_buf,MAXLINE);}close(fd);}void quit(int control_sock,int data_sock){char read_buf[MAXLINE];char send_buf[MAXLINE];/*close data_sock*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);close(data_sock);read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*QUIT\r\n*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"QUIT\r\n");write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);}int main(int argc,char *argv[]){int control_sock,data_sock;struct sockaddr_in server,server_data;char read_buf[MAXLINE];char *ip=NULL;int p,port_data;char send_buf[MAXLINE];/*get port from config.txt*/p=open_config(ip);/*connect port*/control_sock=sock(p);/*login ftp server*/login(control_sock);/*PASV*/port_data=PASV(control_sock);/*open a new port*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);memset(&server,0,sizeof(struct sockaddr_in));data_sock=socket(AF_INET,SOCK_STREAM,0);inet_pton(AF_INET,"192.168.16.144",&server.sin_addr);server.sin_family=AF_INET;server.sin_port=htons(port_data);connect(data_sock,(struct sockaddr *)&server,sizeof(server));//data_sock=sock1(port_data);/*downloas the file*/down_file(control_sock,data_sock);/*close ftp client data_sock*/quit(control_sock,data_sock);close(control_sock);return 0;}

被动方式——上传文件

#include <stdio.h>#include <string.h>#include <errno.h>#include <unistd.h>#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netdb.h>#include <arpa/inet.h>#include <netinet/in.h>#include <sys/stat.h>#include <fcntl.h>#define MAXLINE 128int ch_port(char *read_buf){int n;char *token;char num[6][10];int m=0,i=0;n=strlen(read_buf);read_buf[n-2]=',';token=strtok(read_buf,",");while((token=strtok(NULL,","))!=NULL){strcpy(num[i],token);i++;}m=atoi(num[3])*256+atoi(num[4]);printf("port=%d\n",m);return m;}int main(int argc,char *argv[]){int control_sock,data_sock;struct hostent *hp;struct sockaddr_in server,server_data;char read_buf[MAXLINE];char *port=NULL,*ip=NULL;char send_buf[MAXLINE];char username[MAXLINE];char password[MAXLINE];char *dirname="ftp_upload";/*for windows*///char *dirname="/srv/ftp/upload";/*for ubuntu*/char *filename;FILE *fp_config;int n,p,i,port_data,length=0;int ret,fd;char m;/*if(argc!=2){perror("argc errno");exit(1);}*/fp_config=fopen("config.txt","r");if(fp_config<0){perror("open file error");exit(1);}getline(&port,&length,fp_config);i=strlen(port);port[i-1]='\0';getline(&ip,&length,fp_config);i=strlen(ip);ip[i-1]='\0';p=atoi(port);memset(&server,0,sizeof(struct sockaddr_in));control_sock=socket(AF_INET,SOCK_STREAM,0);inet_pton(AF_INET,ip,&server.sin_addr);server.sin_family=AF_INET;server.sin_port=htons(p);connect(control_sock,(struct sockaddr *)&server,sizeof(server));bzero(&read_buf,sizeof(read_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*login ftp server*//*input username*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);printf("please input username: ");scanf("%s",username);sprintf(send_buf,"USER %s\r\n",username);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*input passwd*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);printf("please input password: ");scanf("%s",password);sprintf(send_buf,"PASS %s\r\n",password);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*PASV*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"PASV\r\n");write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);port_data=ch_port(read_buf);/*open a new port*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);memset(&server,0,sizeof(struct sockaddr_in));data_sock=socket(AF_INET,SOCK_STREAM,0);inet_pton(AF_INET,ip,&server.sin_addr);server.sin_family=AF_INET;server.sin_port=htons(port_data);connect(data_sock,(struct sockaddr *)&server,sizeof(server));sprintf(send_buf,"CWD %s\r\n",dirname);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*STOR filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);printf("please input filename: ");scanf("%s",filename);sprintf(send_buf,"STOR %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*open the file you want upload*/fd=open(filename,O_RDONLY);if(fd<0){perror("open file error");exit(1);}bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);while((ret=read(fd,read_buf,MAXLINE))>0){                write(data_sock,read_buf,ret);                bzero(read_buf,MAXLINE);        }        close(fd);/*close ftp client data_sock*/        bzero(send_buf,MAXLINE);        bzero(read_buf,MAXLINE);        close(data_sock);        read(control_sock,read_buf,MAXLINE);        printf("%s\n",read_buf);        /*QUIT\r\n*/        bzero(send_buf,MAXLINE);        bzero(read_buf,MAXLINE);        sprintf(send_buf,"QUIT\r\n");        write(control_sock,send_buf,strlen(send_buf));        read(control_sock,read_buf,MAXLINE);        printf("%s\n",read_buf);        close(control_sock);return 0;}

主动方式——下载文件

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <sys/socket.h>#include <netinet/in.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#define MAXLINE 128int p1=200,p2=50;int open_config(char *ip){        int p,i,length;        char *port=NULL;        FILE* fp_config;        fp_config=fopen("config.txt","r");        if(fp_config<0){                perror("open file error");                exit(1);        }        getline(&port,&length,fp_config);        i=strlen(port);        port[i-1]='\0';        getline(&ip,&length,fp_config);        i=strlen(ip);        ip[i-1]='\0';        p=atoi(port);        return p;}int sock(int p){        int control_sock;        struct hostent *hp;        struct sockaddr_in server,server_data;        char read_buf[MAXLINE];        char send_buf[MAXLINE];        memset(&server,0,sizeof(struct sockaddr_in));        control_sock=socket(AF_INET,SOCK_STREAM,0);        inet_pton(AF_INET,"192.168.16.144",&server.sin_addr);        server.sin_family=AF_INET;        server.sin_port=htons(p);        connect(control_sock,(struct sockaddr *)&server,sizeof(server));        bzero(&read_buf,sizeof(read_buf));        read(control_sock,read_buf,MAXLINE);        printf("%s\n",read_buf);        return control_sock;}void login(int control_sock){        char username[MAXLINE];        char password[MAXLINE];        char read_buf[MAXLINE];        char send_buf[MAXLINE];        /*username*/        bzero(send_buf,MAXLINE);        bzero(read_buf,MAXLINE);        printf("please input username: ");        scanf("%s",username);        sprintf(send_buf,"USER %s\r\n",username);        write(control_sock,send_buf,strlen(send_buf));        read(control_sock,read_buf,MAXLINE);        printf("%s\n",read_buf);        /*password*/        bzero(send_buf,MAXLINE);        bzero(read_buf,MAXLINE);        printf("please input password: ");        scanf("%s",password);        sprintf(send_buf,"PASS %s\r\n",password);        write(control_sock,send_buf,strlen(send_buf));        read(control_sock,read_buf,MAXLINE);        printf("%s\n",read_buf);}#if 0void down_file(int control_sock){char read_buf[MAXLINE];char send_buf[MAXLINE];char *filename;int fd,ret;char *dirname="ftp_download";//char *dirname="/srv/ftp/download";/*for ubuntu*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"CWD %s\r\n",dirname);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*SIZE filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);bzero(filename,20);printf("please input filename: ");scanf("%s",filename);//printf("%s\n",filename);sprintf(send_buf,"SIZE %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*RETR filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"RETR %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);return filename;}void file(int control_sock,int data_sock,char *filename){/*client create filename and download file*/fd=open(filename,O_RDWR|O_TRUNC|O_CREAT,0777);if(fd<0){perror("open file error");exit(1);}while((ret=read(data_sock,read_buf,MAXLINE))>0){write(fd,read_buf,ret);bzero(read_buf,MAXLINE);}close(fd);}#endifvoid quit(int control_sock,int data_sock){char read_buf[MAXLINE];char send_buf[MAXLINE];/*close data_sock*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);close(data_sock);read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*QUIT\r\n*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"QUIT\r\n");write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);}int main(int argc,char *argv[]){struct sockaddr_in server,name,client_name;int data_sock,control_sock,server_sock;char read_buf[MAXLINE];char send_buf[MAXLINE];char *ip=NULL;int p;socklen_t length;char filename[20];int fd,ret;char *dirname="ftp_download";int server_port;p=open_config(ip);control_sock=sock(p);login(control_sock);//sock_d();server_sock=socket(AF_INET,SOCK_STREAM,0);bzero(&name,sizeof(name));name.sin_family=AF_INET;name.sin_addr.s_addr=htons(INADDR_ANY);server_port=p1*256+p2;name.sin_port=htons(server_port);bind(server_sock,(struct sockaddr *)&name,sizeof(name));listen(server_sock,64);bzero(read_buf,MAXLINE);bzero(send_buf,MAXLINE);sprintf(send_buf,"PORT 192,168,16,92,%d,%d\r\n",p1,p2);write(control_sock,send_buf,MAXLINE);read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"CWD %s\r\n",dirname);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*SIZE filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);bzero(filename,20);printf("please input filename: ");scanf("%s",filename);//printf("%s\n",filename);sprintf(send_buf,"SIZE %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);/*RETR filename*/bzero(send_buf,MAXLINE);bzero(read_buf,MAXLINE);sprintf(send_buf,"RETR %s\r\n",filename);write(control_sock,send_buf,strlen(send_buf));read(control_sock,read_buf,MAXLINE);printf("%s\n",read_buf);length=sizeof(name);data_sock=accept(server_sock,(struct sockaddr *)&name,&length);/*client create filename and download file*/fd=open(filename,O_RDWR|O_TRUNC|O_CREAT,0777);if(fd<0){perror("open file error");exit(1);}while((ret=read(data_sock,read_buf,MAXLINE))>0){write(fd,read_buf,ret);bzero(read_buf,MAXLINE);}close(fd);quit(control_sock,data_sock);close(control_sock);}