二十、FTP云盘

1、服务端

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>#define bufsize 1024
int change(char cmd[128])
{if(!strcmp("ls",cmd)){return 1;}else if(!strcmp("ps",cmd)){return 2;}else if(!strcmp("g",cmd)){return 3;}else if(strstr(cmd,"cd")){return 4;}else if(strstr(cmd,"get")){return 5;}else if(strstr(cmd,"put")){return 6;}}
char *getbehind(char cmd[128])
{char *p;p = (char *)malloc(128);p = strtok(cmd," ");p = strtok(NULL," ");return p;
}
void getmessage(char cmd[128],int c_fd)
{char *p = getbehind(cmd);int fd = open(p,O_RDWR|O_CREAT,0666);char *readbuf = (char *)malloc(8000);read(c_fd,readbuf,8000);write(fd,readbuf,8000);close(fd);memset(readbuf,0,8000);
}
void putmessage(char cmd[128],int c_fd)
{int fd =-1;char *readbuf = (char *)malloc(8000);char *p =(char *)malloc(8000);readbuf = getbehind(cmd);if(access(readbuf,F_OK) == -1){printf("put file failed\n");}else{fd = open(readbuf,O_RDWR,0666);read(fd,p,8000);write(c_fd,p,8000);printf("the file put success\n");close(fd);memset(p,0,8000);}}void choosecmd(char* cmd,int c_fd)
{int ret =-1;FILE *fdb;int fd;char *freadbuf = (char *)malloc(8000);char *readbuf = (char *)malloc(8000);char *p = (char*)malloc(8000);ret = change(cmd);switch(ret){case 1:fdb = popen("ls","r");fread(freadbuf,8000,1,fdb);write(c_fd,freadbuf,8000);memset(freadbuf,0,8000);printf("ok\n");break;   case 2:system("ps");break;case 3:read(c_fd,freadbuf,128);printf("%s\n",freadbuf);exit(1);break;case 4:p = getbehind(cmd);chdir(p);memset(p,0,sizeof(p));break;case 5:putmessage(cmd,c_fd);break;case 6:getmessage(cmd,c_fd);break;}}
int main(int argc,char** argv)
{int c_fd = -1;int s_fd =-1;struct sockaddr_in c_addr;if(argc!=3){perror("argc\n");exit(1);}//sockets_fd = socket(AF_INET,SOCK_STREAM,0);if(s_fd == -1){perror("socket\n");exit(1);}memset(&c_addr,0,sizeof(c_addr));c_addr.sin_family = AF_INET;c_addr.sin_port = htons(atoi(argv[2]));inet_aton(argv[1],&c_addr.sin_addr);//bindbind(s_fd,(struct sockaddr*)&c_addr,sizeof(c_addr));//listenlisten(s_fd,10);//acceptsocklen_t clen = sizeof(c_addr);int nread = 0;char readbuf[1024];printf("wait connecting\n");memset(&c_addr,1,clen);while(1){c_fd = accept(s_fd,(struct sockaddr*)&c_addr,&clen);if(c_fd == -1){perror("accept");exit(1);}printf("connect success!%s\n",inet_ntoa(c_addr.sin_addr));if(fork() == 0){while(1){nread = read(c_fd,readbuf,128);choosecmd(readbuf,c_fd);memset(readbuf,0,sizeof(readbuf));}}}return 0;
}

2、客户端

#include<stdio.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <fcntl.h>
#define bufsize 1024#define bufsize 1024
char *getbehind(char cmd[128])
{char *p;p = (char *)malloc(8000);p = strtok(cmd," ");p = strtok(NULL," ");return p;
}
void getmessage(char cmd[128],int c_fd)
{char *p = getbehind(cmd);int fd = open(p,O_RDWR|O_CREAT,0666);char *readbuf = (char *)malloc(8000);read(c_fd,readbuf,8000);write(fd,readbuf,8000);close(fd);memset(readbuf,0,8000);
}
void putmessage(char cmd[128],int c_fd)
{int fd =-1;char *readbuf = (char *)malloc(8000);char *p =(char *)malloc(8000);readbuf = getbehind(cmd);if(access(readbuf,F_OK) == -1){printf("put file failed\n");}else{fd = open(readbuf,O_RDWR,0666);read(fd,p,8000);write(c_fd,p,8000);printf("the file put success\n");close(fd);memset(p,0,8000);}}
int change(char cmd[128])
{if(!strcmp("ls",cmd)){return 1;}else if(!strcmp("lls",cmd)){return 2;}else if(!strcmp("g",cmd)){return 3;}else if(strstr(cmd,"cd")){return 4;}else if(strstr(cmd,"lcd")){return 5;}else if(strstr(cmd,"get")){return 6;}else if(strstr(cmd,"put")){return 7;}}
void choosecmd(char cmd[128],int c_fd)
{int ret =-1;char *p = (char*)malloc(8000);int fd =-1;char *readbuf =(char*)malloc(8000);ret = change(cmd);switch(ret){case 1:read(c_fd,p,8000);printf("%s\n",p);memset(p,0,8000);break;   case 2:system("ls");break;case 3:printf("unconnecting\n");write(c_fd,"away host",128);close(c_fd);exit(-1);break;case 4:break;case 5:p = getbehind(cmd);chdir(p);memset(p,0,sizeof(p));break;case 6:getmessage(cmd,c_fd);break;case 7:putmessage(cmd,c_fd);break;}}
int main(int argc,char** argv)
{int c_fd = -1;struct sockaddr_in c_addr;if(argc!=3){perror("argc\n");exit(1);}//socketc_fd = socket(AF_INET,SOCK_STREAM,0);if(c_fd == -1){perror("socket\n");exit(1);}memset(&c_addr,0,sizeof(c_addr));c_addr.sin_family = AF_INET;c_addr.sin_port = htons(atoi(argv[2]));inet_aton(argv[1],&c_addr.sin_addr);//connectint clent = sizeof(c_addr);if(connect(c_fd,(struct sockaddr*)&c_addr,clent) == -1){perror("connect");perror("why:");exit(1);}//wait sendchar writebuf[bufsize] = {0};printf("connect .....\n");while(1){fgets(writebuf,1024,stdin);writebuf[strcspn(writebuf, "\n")] = '\0';printf("cmd:%s\n",writebuf);write(c_fd,writebuf,strlen(writebuf));choosecmd(writebuf,c_fd);printf("....................cmd......................\n");memset(writebuf,0,sizeof(writebuf));}return 0;