I need somebody with C skills to change a programm-source to accept command-line parameters.
The default source is
q3ms.c
CODE
/*
Original by Luigi Auriemma
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef WIN32
#include <winsock.h>
#include "winerr.h"
#define close closesocket
#define sleep Sleep
#define ONESEC 1000
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#define ONESEC 1
#endif
#define VER "0.1"
#define BUFFSZ 4096
#define MS "master.quake3arena.com"
#define MSPORT 27950
#define REQ "\xff\xff\xff\xff" \
"getservers 68\n"
#define TIMEOUT 5
int timeout(int sock);
u_int resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
err,
rlen,
i,
tot = 0;
u_char *buff,
*ptr;
u_int ip;
u_short port;
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(2,0), &wsadata);
#endif
setbuf(stdout, NULL);
peer.sin_addr.s_addr = resolv(MS);
peer.sin_port = htons(MSPORT);
peer.sin_family = AF_INET;
rlen = sizeof(peer);
buff = malloc(BUFFSZ + 1);
if(!buff) std_err();
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
fputs("Contacting "MS"\n", stdout);
err = sendto(sd, REQ, sizeof(REQ) - 1, 0, (struct sockaddr *)&peer, rlen);
if(err < 0) std_err();
fputs("\n"
"IP QUERY-PORT\n"
"============================\n", stdout);
while(1) {
err = timeout(sd);
if(err < 0) break;
err = recvfrom(sd, buff, BUFFSZ, 0, (struct sockaddr *)&peer, &rlen);
if(err < 0) std_err();
if(!err) break;
if(memcmp(buff + 4, "getserversResponse", 18)) break;
i = 23; /* 4 (ffffffff) + 18 (get..) + 1 (\) */
ptr = buff + 23;
while(i < err) {
if(!memcmp(ptr, "EOT", 3)) break;
ip = *(u_int *)ptr;
port = *(u_short *)(ptr + 4);
printf("%15s %hu\n",
inet_ntoa(*(struct in_addr *)&ip),
htons(port));
ptr += 7;
i += 7;
tot++;
}
}
close(sd);
printf("\nTotal servers found: %d\n\n", tot);
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_int resolv(char *host) {
struct hostent *hp;
u_int 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_int *)(hp->h_addr);
}
return(host_ip);
}
#ifndef WIN32
void std_err(void) {
perror("\nError");
exit(1);
}
#endif
Original by Luigi Auriemma
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef WIN32
#include <winsock.h>
#include "winerr.h"
#define close closesocket
#define sleep Sleep
#define ONESEC 1000
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#define ONESEC 1
#endif
#define VER "0.1"
#define BUFFSZ 4096
#define MS "master.quake3arena.com"
#define MSPORT 27950
#define REQ "\xff\xff\xff\xff" \
"getservers 68\n"
#define TIMEOUT 5
int timeout(int sock);
u_int resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
err,
rlen,
i,
tot = 0;
u_char *buff,
*ptr;
u_int ip;
u_short port;
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(2,0), &wsadata);
#endif
setbuf(stdout, NULL);
peer.sin_addr.s_addr = resolv(MS);
peer.sin_port = htons(MSPORT);
peer.sin_family = AF_INET;
rlen = sizeof(peer);
buff = malloc(BUFFSZ + 1);
if(!buff) std_err();
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
fputs("Contacting "MS"\n", stdout);
err = sendto(sd, REQ, sizeof(REQ) - 1, 0, (struct sockaddr *)&peer, rlen);
if(err < 0) std_err();
fputs("\n"
"IP QUERY-PORT\n"
"============================\n", stdout);
while(1) {
err = timeout(sd);
if(err < 0) break;
err = recvfrom(sd, buff, BUFFSZ, 0, (struct sockaddr *)&peer, &rlen);
if(err < 0) std_err();
if(!err) break;
if(memcmp(buff + 4, "getserversResponse", 18)) break;
i = 23; /* 4 (ffffffff) + 18 (get..) + 1 (\) */
ptr = buff + 23;
while(i < err) {
if(!memcmp(ptr, "EOT", 3)) break;
ip = *(u_int *)ptr;
port = *(u_short *)(ptr + 4);
printf("%15s %hu\n",
inet_ntoa(*(struct in_addr *)&ip),
htons(port));
ptr += 7;
i += 7;
tot++;
}
}
close(sd);
printf("\nTotal servers found: %d\n\n", tot);
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_int resolv(char *host) {
struct hostent *hp;
u_int 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_int *)(hp->h_addr);
}
return(host_ip);
}
#ifndef WIN32
void std_err(void) {
perror("\nError");
exit(1);
}
#endif
I need to modify this code, to accept the following command-line parameters instead of using pre-compiled constants
MS (for example etmaster.idsoftware.com)
MSPORT ( for example 27950 )
and also to change
REQ to substitute "68" with a third parameter
CODE
#define REQ "\xff\xff\xff\xff" \
"getservers 68\n"
"getservers 68\n"
for example "84 full empty"
What I want is to compile this code and run it with
binary etmaster.idsoftware.com 27950 "84 full empty"
I have no clue about C and hopefully someone is able to modify this code for me.
Thanks alot