Thread: Some Socket Problems...?

I'm trying to write a program that takes a host and outputs the name of the httpd they are running, but this one doesnt seem to work:

Code:

/* Httpd-Chk, by Tal0n 03-20-04 */
/* Uses fingerprints to try and identify httpd's... */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main(int argc, char *argv[]) {

char buffer[4096];

char *data = "HEAD / HTTP/1.1";
int len = strlen(data);

if(argc !=  2) {
printf("\nHttpd-Chk, by Tal0n 03-20-04\n");
printf("\nUsage: %s <host>\n\n", argv[0]);
return 0; }

if(argc == 2) {

int sock;
struct sockaddr_in remote;

remote.sin_family = AF_INET;
remote.sin_port = htons(80);
remote.sin_addr.s_addr = inet_addr(argv[1]);

if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
printf("\nERROR: Can't create socket!\n\n");
return -1; }

if(connect(sock,(struct sockaddr *)&remote, sizeof(struct sockaddr)) < 0) {
printf("\nERROR: Can't connect to %s!\n\n", argv[1]);
return -1; }

printf("\nTrying to identify httpd on %s...\n", argv[1]);

if(send(sock, data, len, 0) < 0) {
printf("\nERROR: Can't send data to %s!\n\n", argv[1]);
return -1; }

sleep(5);

memset(buffer, 0, sizeof(buffer));
read(sock, buffer, sizeof(buffer));

sleep(3);

if(strstr(buffer, "Apache")) {
printf("\n%s is running Apache Httpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Xitami")) {
printf("\n%s is running Xitami Httpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Netscape")) {
printf("\n%s is running Netscape Enterprise Server!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Zeus")) {
printf("\n%s is running Zeus Httpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "IIS")) {
printf("\n%s is running Microsoft IIS!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "thttpd")) {
printf("\n%s is running Thttpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "AOL")) {
printf("\n%s is running AOLServer!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Lotus")) {
printf("\n%s is running Lotus Httpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Akami")) {
printf("\n%s is running Akami Httpd!\n\n", argv[1]);
return 0; }

if(strstr(buffer, "Null")) {
printf("\n%s is running Null Httpd!\n\n", argv[1]);
return 0; }

close(sock);

return 0; }

return 0; }

When I compile and run it, it just sits there, does nothing after:

Code:

Trying to identify httpd on xx.x.xxx.xx...

All help is much appreciated.

Thanks,

-Tal0n

try changing

Code:

char *data = "HEAD / HTTP/1.1";

to

Code:

char *data = "HEAD / HTTP/1.1\r\n\r\n";