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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="184.htm">上一层</a>][<a href="333.htm">下一篇</a>]
<hr><p align="left"><small>发信人: cloudsky (小四), 信区: Security <br>
标 题: nbnbs.c <br>
发信站: 武汉白云黄鹤站 (Sat Apr 15 14:18:58 2000), 站内信件 <br>
/* <br>
* nbnbs.c (c) 2000 by Mixter <mixter@newyorkoffice.com> <br>
* <br>
* http://mixter.warrior2k.com <br>
* <br>
* NetBios Name Bulk Scanner (for Samba and Windows) <br>
* <br>
* Based on nbname.c by mynock (members.xoom.com/retarded), <br>
* parts of the code copyright by the ADM Crew. <br>
* <br>
* I just wrote this little tool, since a netbios long range scanner for <br>
* UNIX wasn't available yet (not that I'm aware of). This program does <br>
* basically the same as "Legion" for Windows by Rhino9. It can scan from <br>
* standard input, from a host list, or a whole A class. See usage for more <br>
. <br>
* PS: This program will never support multi-threaded netbios scans, since <br>
* every process needs to bind to the same udp port (137) to make all <br>
* clients (some windows versions are strict about that source port) answer <br>
. <br>
* <br>
* <br>
* This program is distributed for educational purposes and without any <br>
* explicit or implicit warranty; in no event shall the author or <br>
* contributors be liable for any direct, indirect or incidental damages <br>
* arising in any way out of the use of this software. <br>
* <br>
*/ <br>
#include <stdio.h> <br>
#include <errno.h> <br>
#include <stdlib.h> <br>
#include <string.h> <br>
#include <unistd.h> <br>
#include <netinet/in.h> <br>
#include <arpa/inet.h> <br>
#include <sys/time.h> <br>
#include <sys/types.h> <br>
#include <sys/socket.h> <br>
#include <netdb.h> <br>
int deftimeout = 5; <br>
FILE *output; <br>
#define SERV_PORT 137 <br>
#define QUERYLEN 50 <br>
char nbquery[] = <br>
"\x03\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x20\x43\x4b\x41\x41" <br>
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41" <br>
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x00\x00\x21\x00\x00"; <br>
int resolve (char *hostname, struct sockaddr_in *addr, unsigned short defpor <br>
t); <br>
int <br>
nbname (char *target) <br>
{ <br>
int sockfd, i, n, x = 0; <br>
struct sockaddr_in servaddr, myaddr; <br>
char buf[1024], buf2[1024]; <br>
fd_set readfs; <br>
struct timeval tv; <br>
if (!resolve (target, &servaddr, SERV_PORT)) <br>
{ <br>
fprintf (stderr, "can't resolve %s\n", target); <br>
} <br>
if ((sockfd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) <br>
{ <br>
perror ("socket()"); <br>
return 0; <br>
} <br>
} <br>
memset (&myaddr, 0, sizeof (myaddr)); <br>
myaddr.sin_family = AF_INET; <br>
myaddr.sin_port = htons (SERV_PORT); <br>
myaddr.sin_addr.s_addr = htonl (INADDR_ANY); <br>
if (bind (sockfd, (struct sockaddr *) &myaddr, sizeof (myaddr)) == -1) <br>
{ <br>
fprintf (stderr, "couldn't bind to port %i (%s): Win95 might not answe <br>
r\n" <br>
, SERV_PORT, strerror (errno)); <br>
} <br>
while (1) <br>
{ <br>
if (sendto (sockfd, nbquery, QUERYLEN, 0, (struct sockaddr *) &servadd <br>
r, s <br>
izeof (struct sockaddr_in)) < 0) <br>
{ <br>
perror ("sendto()"); <br>
return 0; <br>
} <br>
FD_ZERO (&readfs); <br>
FD_SET (sockfd, &readfs); <br>
tv.tv_sec = deftimeout; <br>
tv.tv_usec = 0; <br>
n = select (sockfd + 1, &readfs, NULL, NULL, &tv); <br>
switch (n) <br>
{ <br>
case 1: <br>
if ((i = recvfrom (sockfd, buf, 800, 0, NULL, NULL)) < 0) <br>
{ <br>
fprintf (stderr, "receive error\n"); <br>
close (sockfd); <br>
return 0; <br>
} <br>
break; <br>
case 0: <br>
fprintf (stderr, "timeout\n"); <br>
close (sockfd); <br>
return (0); <br>
break; <br>
default: <br>
perror ("select()"); <br>
close (sockfd); <br>
return (0); <br>
break; <br>
} <br>
if (n == 1) <br>
break; <br>
} <br>
for (n = 57; (n < i) && (buf[n] != ' '); n++) <br>
{ <br>
buf2[x] = buf[n]; <br>
x++; <br>
} <br>
fprintf (output, "%s - nbname is '%s'\n", target, buf2); <br>
fflush (output); <br>
close (sockfd); <br>
return 1; <br>
} <br>
int <br>
resolve (char *hostname, struct sockaddr_in *addr, unsigned short defport) <br>
{ <br>
char *p; <br>
struct hostent *he; <br>
bzero (addr, sizeof (struct sockaddr_in)); <br>
addr->sin_family = AF_INET; <br>
if ((p = strchr (hostname, ':'))) <br>
{ <br>
*p++ = '\0'; <br>
addr->sin_port = htons (atoi (p)); <br>
} <br>
else <br>
{ <br>
addr->sin_port = htons (defport); <br>
} <br>
if (!inet_aton (hostname, &addr->sin_addr)) <br>
{ <br>
if (!(he = gethostbyname (hostname))) <br>
{ <br>
return 0; <br>
} <br>
memcpy (&addr->sin_addr, he->h_addr, he->h_length); <br>
} <br>
return 1; <br>
} <br>
int <br>
incip (char *ip) <br>
{ <br>
int a, b, c, d; <br>
sscanf (ip, "%d.%d.%d.%d", &a, &b, &c, &d); <br>
if (b >= 255) <br>
return 0; <br>
if (c >= 255) <br>
{ <br>
c = 0; <br>
b++; <br>
} <br>
if (d >= 255) <br>
{ <br>
d = 0; <br>
c++; <br>
} <br>
d++; <br>
sprintf (ip, "%d.%d.%d.%d", a, b, c, d); <br>
return 1; <br>
} <br>
void <br>
usage (char *av) <br>
{ <br>
fprintf (stderr, "usage: %s [options]\n", av); <br>
fprintf (stderr, " -f <file> - read hosts from file\n"); <br>
fprintf (stderr, " -i - read hosts from standard input\n"); <br>
fprintf (stderr, " -s <class> - scan A class subnet #\n"); <br>
fprintf (stderr, " -o <file> - output scan results to file\n"); <br>
fprintf (stderr, " -t <secs> - set the query timeout in seconds\n"); <br>
exit (0); <br>
} <br>
int <br>
main (int argc, char **argv) <br>
{ <br>
FILE *input = stdin; <br>
int opt = 0, class = 0, mod = 0; <br>
char buffer[512]; <br>
fprintf (stderr, "\t\tnetbios name bulk scanner 0.2\n\n"); <br>
output = stdout; <br>
while ((opt = getopt (argc, argv, "f:is:o:t:")) != EOF) <br>
switch (opt) <br>
{ <br>
case 'f': <br>
fprintf (stderr, "Reading hosts from %s...\n", optarg); <br>
mod = 1; <br>
if ((input = fopen (optarg, "r")) == NULL) <br>
usage (argv[0]); <br>
break; <br>
case 'i': <br>
mod = 1; <br>
fprintf (stderr, "Reading hosts from standard input...\n"); <br>
break; <br>
case 's': <br>
fprintf (stderr, "Scanning A Class %s...\n", optarg); <br>
mod = 2; <br>
if ((class = atoi (optarg)) < 1) <br>
usage (argv[0]); <br>
break; <br>
case 'o': <br>
fprintf (stderr, "Output file: %s...\n", optarg); <br>
if ((output = fopen (optarg, "a")) == NULL) <br>
usage (argv[0]); <br>
break; <br>
case 't': <br>
deftimeout = atoi (optarg); <br>
fprintf (stderr, "Timeout set to %d seconds\n", deftimeout); <br>
break; <br>
default: <br>
usage (argv[0]); <br>
} <br>
if (mod == 1) <br>
{ <br>
while ((fgets (buffer, 512, input)) != NULL) <br>
{ <br>
buffer[strlen (buffer) - 1] = '\0'; <br>
nbname (buffer); <br>
} <br>
} <br>
else if (mod == 2) <br>
{ <br>
sprintf (buffer, "%d.0.0.0", class); <br>
while ((incip (buffer))) <br>
nbname (buffer); <br>
} <br>
else <br>
usage (argv[0]); <br>
return 0; <br>
} <br>
-- <br>
我问飘逝的风：来迟了？ <br>
风感慨：是的，他们已经宣战。 <br>
我问苏醒的大地：还有希望么？ <br>
大地揉了揉眼睛：还有，还有无数代的少年。 <br>
我问长空中的英魂：你们相信？ <br>
英魂带着笑意离去：相信，希望还在。 <br>
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