ftp_server_client.rar_FTP_SERVER_CLIENT_linux C ftp server

/***************************************************************** ** File Name:client.c * Author:Maxiao * Date:2003.5.23 *****************************************************************/ #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <limits.h> #include <string.h> #include <ctype.h> #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> #include <netinet/in.h> #include <arpa/inet.h> #include <errno.h> #include <dirent.h> #define MAX_INPUT_SIZE 200 #define SERVICE_PORT 3000 #define FILEBUF_SIZE 1000 unsigned int get(char * filename, char * server); unsigned int put(char * filename, char * server); unsigned int pwd(char * server); unsigned int rls(char * server); unsigned int rcd(char * filename, char * server); void help(); void lpwd(); void ldir(); void lcd(char * filename); unsigned int mdk(char * pathname, char * server); unsigned int rmd(char * pathname, char * server); unsigned int dlf(char * filename, char * server); int main(int argc, char *argv[]) { char line_in[MAX_INPUT_SIZE+1]; unsigned int bytes; line_in[0] = '\0'; /* Enforce the correct usage */ if (argc != 2) { printf("\nUsage: \"./client ServerName( or IpAddress)\"\n"); exit(1); } /* Print a welcome and instructions */ help(); printf("\n> "); /* First prompt */ while (strncmp("quit", line_in, 4) != 0) { /* As long as "quit" wasn't entered */ fgets(line_in, MAX_INPUT_SIZE, stdin); /* Get the input line */ line_in[strlen(line_in)-1] = '\0'; /* Replace the newline that gets copied */ if (strncmp("quit", line_in, 4) != 0) { /* If it's not "quit" */ if (strncmp("put", line_in, 3) == 0) { /* PUT command... */ if ((bytes=put(&(line_in[4]), argv[1]))) { printf("put successful: %d bytes sent to server", bytes); } else { printf("put unsuccessful..."); } } else if (strncmp("get", line_in, 3) == 0) { /* GET command... */ if ((bytes=get(&(line_in[4]), argv[1]))) { printf("get successful: %d bytes retrieved from server", bytes); } else { printf("get unsuccessful... file probably does not exist"); } } else if (strncmp("rls", line_in, 3) == 0) { /* dir command... (remote) */ if (rls(argv[1])==0) { printf("Unable to retrieve remote directory listing!"); } } else if (strncmp("ldir", line_in, 4) == 0) { /* ldir command... (local) */ ldir(); } else if (strncmp("lpwd", line_in, 3) == 0) { /* lpwd command... (local) */ lpwd(); } else if (strncmp("help", line_in, 1) == 0) { /* ? command... (local) */ help(); } else if (strncmp("pwd", line_in, 3) == 0) { /* pwd command... (remote) */ if (pwd(argv[1])==0) { printf("Unable to retrieve remote directory listing!"); } } else if (strncmp("rcd", line_in, 3) == 0) { /* rcd command... (remote)*/ if ((bytes=rcd(&(line_in[4]), argv[1]))) { printf("get unsuccessful.", bytes); } else { printf(&(line_in[4])); } } else if (strncmp("lcd", line_in, 3) == 0) { /* lcd command... (local)*/ lcd(&(line_in[4])) ; }else if (strncmp("mkd", line_in, 3) == 0) { /* lcd command... (local)*/ if((bytes= mkd(&(line_in[4]),argv[1]))){ printf("mkd successful.",bytes); }else{ printf("mkd success",&(line_in[4])); } } else if (strncmp("rmd", line_in, 3) == 0) { /* GET command... */ if ((bytes=rmd(&(line_in[4]), argv[1]))) { printf("rmd unsuccessful... director probably does not exist"); } else { printf("rmd successful"); } }else if (strncmp("dlf", line_in, 3) == 0) { /* GET command... */ if ((bytes=dlf(&(line_in[4]), argv[1]))) { printf("dlf successful."); } else { printf("dlf unsuccessful... file probably does not exist"); } } else { printf("Unrecognized command!"); } printf("\n> "); /* Next prompt */ } } exit(0); } /*show the help info*/ void help() { printf("\nWelcome to FTP program client!\n"); printf("Valid commands are (case sensitive):\n"); printf("\tget\t\tPlaces a remote file in the local directory\n"); printf("\tput\t\tPlaces a local file in the remote directory\n"); printf("\tpwd\t\tLists a remote current directory\n"); printf("\trls\t\tLists the contents of the remote directory\n"); printf("\trcd\t\tChange a remote current directory\n"); printf("\thelp\t\tFor help\n"); printf("\tquit\t\tExits the program\n"); printf("\tlpwd\t\tLists a local current directory\n"); printf("\tldir\t\tLists the contents of the local directory\n"); printf("\tlcd\t\tChange client current directory\n"); printf("\tmkd\t\tCreat directory in the remonte directory\n"); printf("\trmd\t\tDelete directory in the remote directory\n"); } /*Places a local file in the remote directory*/ unsigned int put(char * filename, char * server) { int sck; struct sockaddr_in serv_adr; struct hostent *host; FILE *infile; unsigned char databuf[FILEBUF_SIZE]; int bytes = 0, bytesread = 0; /* Open the file locally */ if ((infile = fopen(filename, "r")) == 0) { perror("fopen failed to open file"); return 0; } /* Attempt to get the IP for the server by hostname */ host = gethostbyname(server); if (host == (struct hostent *) NULL) { perror("gethostbyname failed"); return 0; } /* Setup the port for the connection */ memset(&serv_adr, 0, sizeof(serv_adr)); serv_adr.sin_family = AF_INET; memcpy(&serv_adr.sin_addr, host->h_addr, host->h_length); serv_adr.sin_port = htons(SERVICE_PORT); /* Get the socket */ if ((sck = socket(AF_INET, SOCK_STREAM, 0)) < 0) { perror("error on socket()"); return 0; } /* Connect to the server */ if (connect(sck, (struct sockaddr *)&serv_adr, sizeof(serv_adr)) < 0) { perror("error on connect()"); return 0; } /* Write the command & filename, followed by two newlines */ write(sck, "PUT ", 4); write(sck, filename, strlen(filename)); write(sck, "\n\n", 2); /* Read from the file and write to the socket */ while ((bytes = read(fileno(infile), databuf, FILEBUF_SIZE)) > 0) { write(sck, databuf, bytes); bytesread += bytes; } /* Close the file */ fclose(infile); if ((bytes = read(sck, databuf, 2)) > 0) { /* Read the status bytes from the server, print and return accordingly */ if ((databuf[0] == 'E') && (databuf[1] == 'R')) { printf("Server error on PUT!\n"); close(sck); return 0; } else if ((databuf[0] == 'N') && (databuf[1] == 'W')) { printf("File created on server\n"); close(sck); return bytesread; } else if ((databuf[0] == 'U') && (databuf[1] == 'P')) { printf("File updated on server\n"); close(sck); return bytesread; } } else return 0; } /*Places a remote file in the local directory*/ unsigned int get(char * filename, char * server) { int sck; struct sockaddr_in serv_adr; struct hostent *host; FILE *outfile; short file_open=0; unsigned char databuf[FILEBUF_SIZE]; int bytes = 0, bytesread = 0; /* Attempt to get the IP for the server by hostname */ host = gethostbyname(server); if (host == (struct hostent *) NULL) { perror("gethostbyname failed"); return 0; } /* Setup the port for the connection */ memset(&serv_adr, 0, sizeof(serv_adr)); serv_adr.sin_family = AF_INET; memcpy(&serv_adr.sin_addr, host-