#83 --readrange

#include "main-readrange.h"

#include "ranges.h"

#include "masscan.h"

/***************************************************************************

 ***************************************************************************/

static unsigned

count_cidr_bits(struct Range range)

{

    unsigned i;

    for (i=0; i<32; i++) {

        unsigned mask = 0xFFFFFFFF >> i;

        if ((range.begin & ~mask) == (range.end & ~mask)) {

            if ((range.begin & mask) == 0 && (range.end & mask) == mask)

                return i;

        }

    }

    return 0;

}

/***************************************************************************

 ***************************************************************************/

void

main_readrange(struct Masscan *masscan)

{

    struct RangeList *list = &masscan->targets;

    unsigned i;

    FILE *fp = stdout;

    for (i=0; i<list->count; i++) {

        struct Range range = list->list[i];

        fprintf(fp, "%u.%u.%u.%u",

            (range.begin>>24)&0xFF,

            (range.begin>>16)&0xFF,

            (range.begin>> 8)&0xFF,

            (range.begin>> 0)&0xFF

            );

        if (range.begin != range.end) {

            unsigned cidr_bits = count_cidr_bits(range);

            if (cidr_bits) {

                fprintf(fp, "/%u", cidr_bits);

            } else

            fprintf(fp, "-%u.%u.%u.%u",

                (range.end>>24)&0xFF,

                (range.end>>16)&0xFF,

                (range.end>> 8)&0xFF,

                (range.end>> 0)&0xFF

                );

        }

        fprintf(fp, "\n");

    }

}

#ifndef MAIN_READRANGE_H

#define MAIN_READRANGE_H

struct Masscan;

void

main_readrange(struct Masscan *masscan);

#endif