tags/REL-1.1/ftp_str.c

/*

    libftp 1.0 (stable): this is an FTP library to simplify the work to a Developer
    who want to work with FTP servers (RFC 959).
    Copyright (C) 2007/2008  omnipresent - omnipresent[at]email.it

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/
#include "ftp_main.h"
#include <stdio.h>
#include <string.h>
/* Path of the Current Work Directory */
char path[1050]={'\0'};

/* 
*
* strfnbytes: look for needle into big_str for n bytes
* char *big_str: big string (where to look for needle)
* char *needle: string that you need
* int bytes: first n bytes
*
*/


int strfnbytes(char *big_str, char *needle, int bytes) {

    int i=0;
    int same=0;

    if (strlen(big_str)-1 < bytes) {
        printf("[-] Big String MUST BE major than %d\n", bytes);
        printf("Aborting...\n");
        return (-1);
    }


    if (strlen(needle)-1 >= bytes) {
        printf("[-] needle MUST BE the same as n bytes\n");
        printf("Aborting...\n");
        return (-1);
    }

        
    while (big_str[i] != '\0') {

        if (i >= bytes)
            break;
                
        if (needle[i] == big_str[i]) {
                        
            same++;
        } else {
                        
            same=0;
            break;
        }

        i++;
                
    }

    if (same != 0)
        return 0;
    else
        return -1;

}

/* 
 *
 * find_pasv: find the ports in the PASV message reply
 * char *StrPasv: the reply string to working on it
 * int verbose: verbose mode
 *      - 1 Yes
 *      - 0 No
 *
 */

int find_pasv (char *StrPasv, int verbose)
{
    char p1[100];
    char p2[100]; 

    int port1 = 0;
    int port2 = 0;
    int count = 0;
    int i = 0;
    int temp = 0;
    int tmp = 0;
    int sum = 0;

    extern int data_port1;
    extern int data_port2;


    int len = strlen(StrPasv);

    len = len-2;
    StrPasv[len] = '\0';

        
    if (strstr(StrPasv, ")") == NULL) { //mmh an error occur..
        return 1;
    }

    while (StrPasv[i] != '\0') {
        if (StrPasv[i] == ')') { 
            break;
        }

        i++;
    }


    temp = i;
    i = 0;


    data_port1 = 0;
    data_port2 = 0;

    count = temp;

    count = count - 1;

    memset(p1, 0x0, 100);
    memset(p2, 0x0, 100);

    if (verbose == 1) {
        printf("--[ Server: %s\n", StrPasv);
    }

    while (StrPasv[count] != ',') {

        if (i >= 100)
            return -1;

        p1[i] = StrPasv[count];
        
        count--;
        i++;

    }

    p1[i] = '\0';

        
    count--;
    i = 0;

    while (StrPasv[count] != ',') {

        p2[i] = StrPasv[count];
        
        
        count--;
        i++;

    }

    p2[i] = '\0';

    i = 0;
    count = 0;
    tmp = 0;
    sum = 0;

    while (p1[i] != '\0') {

        tmp = 0;
        sum = 0;

        if (i == 1) {
                
            tmp = (int)p1[i] - 48;
            sum = 10*tmp;

            port1 = port1 + sum;

        } else if (i == 2) {

            tmp = (int)p1[i] - 48;
        
            sum = 100*tmp;
        
            port1 = port1 + sum;

        } else if (i == 0) {
                
            tmp = (int)p1[i] - 48;
                
            port1 = port1 + tmp;
        
        } else if ( i > 2) {

            return -1;

        }

        i++;
        
    }

    i = 0;
    count = 0;
    tmp = 0;
    sum = 0;

    while (p2[i] != '\0') {

        tmp = 0;
        sum = 0;

        if (i == 1) {
                
            tmp = (int)p2[i] - 48;
            sum = 10*tmp;

            port2 = port2 + sum;

        } else if (i == 2) {

            tmp = (int)p2[i] - 48;
        
            sum = 100*tmp;
        
            port2 = port2 + sum;

        } else if (i == 0) {
                
            tmp = (int)p2[i] - 48;
                
            port2 = port2 + tmp;

        } else if ( i > 2) {

            return -1;

        }

        i++;
        
    }

    data_port2 = port1;
    data_port1 = port2;


    return 0;


}

/* 
 *
 * ftp_DataPort: Make the right Data Port for transfer connections
 * int PortOne: First port in the PASV reply
 * int PortTwo: Second port in the PASV reply
 *
 */

int ftp_DataPort (int PortOne, int PortTwo) {

/*** HOWTO Data Transfer Connection:
     ((port1 * 256) + port2)
***/

    extern int data_port;

    data_port = 0;

    data_port = PortOne * 256;
    data_port = data_port + PortTwo;

    return data_port;

}

/* 
 *
 * ftp_path: Reply with the Current Directory
 * char *PathCurDir: Reply of the FTPD from the PWD command
 * 
 */

int ftp_path (char *PathCurDir) {

    int i = 0;
    int count = 0;

    if (strlen(PathCurDir) > 1024)
        return -1;

    while (PathCurDir[i] != '"') {

        if (i >= 1024)
            return -1;
        i++;

    }

    i++;

    while (PathCurDir[i] != '"') {

        if (i >= 1024) {
            path[i] = '\0';
            break;
        }

        path[count] = PathCurDir[i];
        i++;
        count++;
    }

    if (i >= 1024) {
        path[i] = '\0';
        return 0;
    }

    path[count] = '\0';

    return 0;

}