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resolver.c

resolver.c
Posted Apr 2, 2003
Authored by jaguar

Mass domain name resolver that takes a file full of IP addresses as input.

tags | tool
systems | unix
SHA-256 | 1e7ebd83d4d2836ad207b8a6a69f7c1349b1863e7d37f837079afbcd63fb7cc9

resolver.c

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/* resov.c v1.0 mass domain resolver by jaguar
it accepts ips from a file
greets : dim , devine
*/


#include<stdio.h>
#include<netdb.h>
#include<netinet/in.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<errno.h>
int main(int argc,char *argv[])
{
int c,i;
char ch[17];
FILE *fp;
struct hostent *host;
struct in_addr addr;
char *atmname;
unsigned long atm;

if(argc !=2) {
printf("usage: <filename> \n");
exit(1);

}
if((fp = fopen(argv[1], "r")) == NULL) {
printf("cannot open file %s\n", argv[1]);
exit(1);
}

fprintf(stdout,"--------------------------------\n");
fprintf(stdout,"### mass DNS resolver ###\n");
fprintf(stdout," www.badc0ded.com\n");
fprintf(stdout, "written by jaguar ###\n");
fprintf(stdout,"---------------------------------\n");


while((fgets(ch,17,fp)) != (char *) 0 ) {
atm = inet_addr(ch);

host = gethostbyaddr((char *)&atm,sizeof(struct in_addr),AF_INET);
if(host == NULL) {

fprintf(stderr,"couldnt resolve host %s",ch);
continue;
}
fprintf(stdout,"%s\t<-->\t%s\n",ch,host->h_name);

}
fclose(fp);
}


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