qqwry.c

解析 QQwry 的 C 语言程序

                  起始IP为索引部分的前4位16进制
                  结束IP在IP信息部分的前4位16进制中，靠索引部分指定的偏移量找寻*/
                start_ip=getValue(fp,i,4);
                end_ip=getValue(fp,getValue(fp,i+4,3),4);
                /*导出IP信息，格式是
                  起始IP\t结束IP\t国家位置\t地域位置\n*/
                fprintf(out,"%d.%d.%d.%d",(start_ip&0xFF000000)>>0x18,(start_ip&0x00FF0000)>>0x10,(start_ip&0x0000FF00)>>0x8,start_ip&0x000000FF);
                fprintf(out,"\t");
                fprintf(out,"%d.%d.%d.%d",(end_ip&0xFF000000)>>0x18,(end_ip&0x00FF0000)>>0x10,(end_ip&0x0000FF00)>>0x8,end_ip&0x000000FF);
                getAddress(fp,getValue(fp,i+4,3),&country,&location);
                fprintf(out,"\t%s\t%s\n",country,location);
                count++;
        }
        /*返回导出总条数*/
        return count;
};


/*判断一个字符是否为数字字符，
  如果是，返回0
  如果不是，返回1*/
int beNumber(char c)
{
        if(c>='0'&&c<='9')
                return 0;
        else
                return 1;
};


/*函数的参数是一个存储着IP地址的字符串首地址
  返回该IP的16进制代码
  如果输入的IP地址有错误，函数将返回0*/
unsigned long getIP(char *ip_addr)
{
        unsigned long ip=0;
        int i,j=0;
        /*依次读取字符串中的各个字符*/
        for(i=0;i<strlen(ip_addr);i++)
        {
                /*如果是IP地址间隔的‘.’符号
                  把当前读取到的IP字段的值，存入ip变量中
                  （注意，ip为叠加时，乘以16进制的0x100）
                  并清除临时变量的值*/
                if(*(ip_addr+i)=='.')
                {
                        ip=ip*0x100+j;
                        j=0;
                }
                /*往临时变量中写入当前读取到的IP字段中的字符值
                  叠加乘以10，因为输入的IP地址是10进制*/
                else
                {
                        /*判断，如果输入的IP地址不规范，不是10进制字符
                          函数将返回0*/
                        if(beNumber(*(ip_addr+i))==0)
                                j=j*10+*(ip_addr+i)-'0';
                        else
                                return 0;
                }
        }
        /*IP字段有4个，但是‘.’只有3个，叠加第四个字段值*/
        ip=ip*0x100+j;
        return ip;
};


/*显示logo信息*/
void logo(void)
{
        printf("=============================================================================\n");
        printf("--- Get the IP info.s from QQWry.dat v0.1   by dorainm  [e-mail] ---\n");
        printf("=============================================================================\n");
};


/*显示程序语法*/
void usage(char *app_name)
{
        printf("\nUsage : %s [options]\n",app_name);
        printf("options:\n");
        printf("  -a <address>    Search and display the Informations by Location Address.(*)\n");
        printf("  -i <IP>         Search and display the Informations by IP Address.\n");
        printf("  -o <FILE>       Output all the informations to a text file.\n");
        printf("  -local          Display the localhost IP's informations.(*)\n");
        printf("  -updata         Update the QQWry.dat from the Internet.(*)\n\n");
        printf("ps:  the optionss marked (*) are incompleted.\n");
};


/*显示结束信息*/
void showend(void)
{
        printf("\n\nThe command completed successfully.\n\n");
};

/*主函数*/
int main(int argc, char *argv[])
{
        FILE *fp;                                                /*打开QQWry.dat的文件指针*/
        unsigned long index_start,index_end,current;                /*索引部分的起始位置的文件偏移量
                                                                  索引部分的结束位置的文件偏移量
                                                                  待搜索IP地址的索引条目的文件偏移量*/
        char *country;                                                /*国家位置*/
        char *location;                                                /*地域位置*/
        country=(char*)malloc(MAXBUF);
        location=(char*)malloc(MAXBUF);
        
        logo();
        if(argc<3)
        {
                usage(argv[0]);
                showend();
                return 1;
        }        
        
        /*打开QQWry.dat文件*/
        if((fp=fopen(QQWRY,"rb"))==NULL)
        {
                printf("[-]  Error : Can not open the file %s.\n",QQWRY);
                showend();
                return 2;
        }
        else
                printf("[+]  Open the file [ %s ] successfully.\n",QQWRY);

        /*显示QQWry.dat文件信息*/
        getHead(fp,&index_start,&index_end);
        getAddress(fp,getValue(fp,index_end+4,3),&country,&location);
        printf("[+]  Version of QQWry.dat : [ %s %s ]\n",country,location);
        printf("[+]  Index Location [ 0x%X - 0x%X ].\n",index_start,index_end);
        
        /*判断第一个参数的值*/
        if((strncmp(argv[1],"-i",2)==0)||(strncmp(argv[1],"-I",2)==0))
        {
                /*-i参数，搜索IP*/
                unsigned long ip;

                ip=getIP(argv[2]);
                if(ip==0)
                {
                        printf("[-]  Error : the IP Address inputed.\n");
                        showend();
                        return 3;
                }

                /*搜索IP在索引区域的条目的偏移量*/
                current=searchIP(fp,index_start,index_end,ip);
                printf("[+]  Address of index for [ %X ] is %X\n",ip,current);

                /*获取该IP对因的国家地址和地域地址*/
                getAddress(fp,getValue(fp,current+4,3),&country,&location);
                printf("[+]  Get the location for the IP address.\n");
                printf("[+]  [ IP Address ] %d.%d.%d.%d\n",(ip&0xFF000000)>>0x18,(ip&0x00FF0000)>>0x10,(ip&0x0000FF00)>>0x8,ip&0x000000FF);
                printf("[+]  [  Location  ] %s %s\n",country,location);
        }
        else if((strncmp(argv[1],"-o",2)==0)||(strncmp(argv[1],"-O",2)==0))
        {
                /*-o参数，解压缩数据库，导出IP信息到文本文件*/
                FILE *out;
                unsigned long num;
                if((out=fopen(argv[2],"w"))==NULL)
                {
                        printf("[-]  Error create the output text file [ %s ].\n","out.txt");
                        showend();
                }
                else
                {
                        printf("[+]  Create the output text file [ %s ] successfully.\n","out.txt");
                }

                /*导出IP条目信息*/
                printf("[+]  Outputing the informations ...");
                num=putAll(fp,out,index_start,index_end);
                printf("Finished.\n");
                fclose(out);
                /*显示导出条目的数量*/
                printf("[+]  The Total items number is [ %d ].",num);
        }
        /*关闭文件指针，释放变量空间，结束程序*/
        fclose(fp);
        free(country);
        free(location);
        showend();
        return 0;
}