From c00b46344cce7b05d6e0db74359de1971d2d09ec Mon Sep 17 00:00:00 2001 From: "Steinar H. Gunderson" Date: Thu, 18 Apr 2019 17:25:39 +0200 Subject: [PATCH] Import nbtscanner 0.1.0. --- COPYING | 339 ++++++++++++++++++++++++++++++++++++++++++++ Makefile | 54 +++++++ README | 7 + byteorder.h | 40 ++++++ configfile.c | 255 +++++++++++++++++++++++++++++++++ configfile.h | 46 ++++++ id_list.c | 134 ++++++++++++++++++ id_list.h | 73 ++++++++++ init.sql | 17 +++ mysql_interface.c | 138 ++++++++++++++++++ mysql_interface.h | 34 +++++ nbtscanner.c | 338 +++++++++++++++++++++++++++++++++++++++++++ nbtscanner.conf | 72 ++++++++++ nbtscanner.h | 39 +++++ nmb.c | 354 ++++++++++++++++++++++++++++++++++++++++++++++ nmb.h | 42 ++++++ outputfile.c | 57 ++++++++ packet.h | 76 ++++++++++ socket.c | 158 +++++++++++++++++++++ socket.h | 39 +++++ stats.c | 68 +++++++++ stats.h | 44 ++++++ util.c | 38 +++++ util.h | 33 +++++ 24 files changed, 2495 insertions(+) create mode 100644 COPYING create mode 100644 Makefile create mode 100644 README create mode 100644 byteorder.h create mode 100644 configfile.c create mode 100644 configfile.h create mode 100644 id_list.c create mode 100644 id_list.h create mode 100644 init.sql create mode 100644 mysql_interface.c create mode 100644 mysql_interface.h create mode 100644 nbtscanner.c create mode 100644 nbtscanner.conf create mode 100644 nbtscanner.h create mode 100644 nmb.c create mode 100644 nmb.h create mode 100644 outputfile.c create mode 100644 packet.h create mode 100644 socket.c create mode 100644 socket.h create mode 100644 stats.c create mode 100644 stats.h create mode 100644 util.c create mode 100644 util.h diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..e77696a --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 675 Mass Ave, Cambridge, MA 02139, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) 19yy + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) 19yy name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..4d7b6a1 --- /dev/null +++ b/Makefile @@ -0,0 +1,54 @@ +# change for your CPU and compiler + +# note that mysql_config is braindamaged ;-) +CC=gcc +CFLAGS=-g -Wall "`mysql_config --cflags | tr -d \'`" + +LIBS=`mysql_config --libs | tr -d \'` # '` +LDFLAGS=-lefence + +# +# *** end of configuration *** +# + +# due to some icky programming, we will have to add all the .o files everywhere. + +OBJSN=nbtscanner.o mysql_interface.o configfile.o nmb.o stats.o socket.o util.o id_list.o +OBJSO=outputfile.o mysql_interface.o configfile.o nmb.o stats.o socket.o util.o id_list.o + +all: nbtscanner outputfile +nbtscanner: $(OBJSN) + $(CC) -o nbtscanner $(OBJSN) $(LIBS) +outputfile: $(OBJSO) + $(CC) -o outputfile $(OBJSO) $(LIBS) + +nbtscanner.o: nbtscanner.c nbtscanner.h configfile.h mysql_interface.h nmb.h socket.h stats.h \ + packet.h byteorder.h util.h id_list.h + $(CC) $(CFLAGS) -c nbtscanner.c +outputfile.o: outputfile.c configfile.h mysql_interface.h + $(CC) $(CFLAGS) -c outputfile.c + +mysql_interface.o: mysql_interface.c mysql_interface.h + $(CC) $(CFLAGS) -c mysql_interface.c + +configfile.o: configfile.c configfile.h nbtscanner.h + $(CC) $(CFLAGS) -c configfile.c + +nmb.o: nmb.c nmb.h packet.h byteorder.h util.h + $(CC) $(CFLAGS) -c nmb.c + +stats.o: stats.c stats.h configfile.h util.h + $(CC) $(CFLAGS) -c stats.c + +socket.o: socket.c socket.h nmb.h packet.h + $(CC) $(CFLAGS) -c socket.c + +util.o: util.c util.h + $(CC) $(CFLAGS) -c util.c + +id_list.o: id_list.c id_list.h configfile.h util.h + $(CC) $(CFLAGS) -c id_list.c + +.PHONY: clean +clean: + rm -f $(OBJSO) $(OBJSN) nbtscanner outputfile diff --git a/README b/README new file mode 100644 index 0000000..01ec31d --- /dev/null +++ b/README @@ -0,0 +1,7 @@ +This program is GPLed, v2. No documentation exists yet -- use common +sense and read the source :-) + +This program borrows considerable amount of code from Samba, and would +not be possible at all without it. Big thanks to the Samba team :-) + +- Steinar H. Gunderson diff --git a/byteorder.h b/byteorder.h new file mode 100644 index 0000000..e90b3d7 --- /dev/null +++ b/byteorder.h @@ -0,0 +1,40 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * byteorder.h: structure access functions (i386 only!). + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _BYTEORDER_H +#define _BYTEORDER_H 1 + +#define IVAL(buf,pos) (SVAL(buf,pos)|SVAL(buf,(pos)+2)<<16) +#define SREV(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF)) +#define SVAL(buf,pos) (*(unsigned short *)((char *)(buf) + (pos))) +#define SSVAL(buf,pos,val) SVAL(buf,pos)=((unsigned short)(val)) +#define RSSVAL(buf,pos,val) SSVAL(buf,pos,SREV(val)) +#define RSVAL(buf,pos) SREV(SVAL(buf,pos)) +#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) +#define RIVAL(buf,pos) IREV(IVAL(buf,pos)) +#define IREV(x) ((SREV(x)<<16) | (SREV((x)>>16))) + +#define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2))) + +#endif /* _BYTEORDER_H */ diff --git a/configfile.c b/configfile.c new file mode 100644 index 0000000..3b15403 --- /dev/null +++ b/configfile.c @@ -0,0 +1,255 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * configfile.c: Functions for parsing the configuration file. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "configfile.h" +#include "nbtscanner.h" +#include "mysql_interface.h" + +#include +#include +#include +#include +#include +#include + +int num_retries; +int retry_time; +int delay_time; +int verbosity; + +int use_mysql; +char mysql_host[64]; +char mysql_username[32]; +char mysql_password[32]; + +void parse_configfile(int do_scan) +{ + FILE *configfile = fopen("nbtscanner.conf", "r"); + int lineno = 0; + + if (configfile == NULL) { + perror("nbtscanner.conf"); + exit(1); + } + + /* defaults */ + num_retries = 3; + retry_time = 5000; + delay_time = 100; + verbosity = 2; + + use_mysql = 0; + strcpy(mysql_host, "no_host_given"); + strcpy(mysql_username, "no_username_given"); + strcpy(mysql_password, "no_password_given"); + + while (!feof(configfile)) { + char buf[1024]; + + lineno++; + + fgets(buf, 1024, configfile); + while (buf[strlen(buf) - 1] == '\n' || buf[strlen(buf) - 1] == '\r') { + buf[strlen(buf) - 1] = '\0'; + } + + if (buf[0] == '#' || buf[0] == '\0') { + /* comment or blank line */ + continue; + } + if (strspn(buf, " \t") == strlen(buf)) { + /* blank line */ + continue; + } + + parse_line(buf, lineno, do_scan); + } + + fclose(configfile); +} + +void parse_line(char *buf, int lineno, int do_scan) +{ + char *ptr = strchr(buf, '='); + + if (ptr == NULL || strchr(ptr + 1, '=') != NULL) { + line_error(lineno, "Malformed line (must be exactly one `=' sign)"); + } + + /* split the line into a keyword and a value */ + ptr[0] = 0; + ptr++; + + /* + * trim any trailing spaces, make sure there are no spaces in + * the value + */ + { + char *ptr2 = strchr(ptr, ' '); + if (ptr2 != NULL) { + /* must only be spaces from here */ + if (strspn(ptr2 + 1, " ") != strlen(ptr2 + 1)) { + line_error(lineno, "Malformed value (can't have any spaces)"); + } + + ptr2[0] = 0; + } + } + + /* make sure both the parameter and the value is non-empty */ + if (buf[0] == '\0') { + line_error(lineno, "Malformed keyword (can't be empty)"); + } + if (ptr[0] == '\0') { + line_error(lineno, "Malformed value (can't be empty)"); + } + + /* finally pass it on to the keyword checker */ + parse_keyword(buf, ptr, lineno, do_scan); +} + +void parse_keyword(char *keyword, char *value, int lineno, int do_scan) +{ + if (strcasecmp(keyword, "num_retries") == 0) { + parse_int(value, &num_retries, lineno); + } else if (strcasecmp(keyword, "retry_time") == 0) { + parse_int(value, &retry_time, lineno); + } else if (strcasecmp(keyword, "delay_time") == 0) { + parse_int(value, &delay_time, lineno); + } else if (strcasecmp(keyword, "verbosity") == 0) { + parse_int(value, &verbosity, lineno); + } else if (strcasecmp(keyword, "use_mysql") == 0) { + parse_int(value, &use_mysql, lineno); + } else if (strcasecmp(keyword, "mysql_host") == 0) { + strcpy(mysql_host, value); + } else if (strcasecmp(keyword, "mysql_username") == 0) { + strcpy(mysql_username, value); + } else if (strcasecmp(keyword, "mysql_password") == 0) { + strcpy(mysql_password, value); + } else if (strcasecmp(keyword, "range") == 0) { + /* really ugly to have here */ + if (use_mysql) { + init_mysql(mysql_host, mysql_username, mysql_password); + } + if (do_scan) parse_range(value, lineno); + } else { + char buf[1024]; + sprintf(buf, "Unknown keyword `%s'", keyword); + line_error(lineno, buf); + } +} + +void parse_int(char *string, int *retval, int lineno) +{ + if (strspn(string, "0123456789") != strlen(string)) { + char buf[1024]; + sprintf(buf, "`%s' isn't a positive integer", string); + line_error(lineno, buf); + } + + *retval = atoi(string); +} + +void parse_range(char *string, int lineno) +{ + /* exactly one / is allowed */ + char *ptr = strchr(string, '/'); + struct in_addr in; + int rangesize; + + if (ptr != NULL && strchr(ptr + 1, '/') != NULL) { + line_error(lineno, "Malformed range (only one `/' allowed)"); + } + + /* lots and lots of code :-) */ + if (ptr == NULL) { /* single IP */ + rangesize = 32; + } else { /* range */ + ptr[0] = 0; + ptr++; + + /* find out whether this is a pure integer or not */ + if (strspn(ptr, "0123456789") == strlen(ptr)) { + rangesize = atoi(ptr); + if (rangesize < 0 || rangesize > 32) { + line_error(lineno, "Malformed range (significant bits must be between 0 and 32, inclusive)"); + } + } else if (strspn(ptr, "0123456789.") == strlen(ptr)) { + /* IP address... */ + struct in_addr netmask; + int found, i; + + if (inet_aton(ptr, &netmask) == 0) { + line_error(lineno, "Malformed range (malformed netmask)"); + } + + /* find the rightmost 1-bit (by finding the leftmost 0-bit) */ + found = 0; + for (i = 31; i >= 0; i--) { + if ((netmask.s_addr & (1 << i)) == 0) { + found = 1; + break; + } + } + if (found == 0) { + rangesize = 32; /* 255.255.255.255 */ + } else { + unsigned int clean_mask = htonl(~((1 << (31-i)) - 1)); + + rangesize = i + 1; + + /* verify that this is a `clean' netmask */ + if (netmask.s_addr != clean_mask) { + line_error(lineno, "Malformed range (netmask must be `clean')"); + } + } + } else { + line_error(lineno, "Malformed range (malformed netmask)"); + rangesize = 32; /* will never reach this, but for gcc */ + } + } + + /* try to scan the IP part */ + if (inet_aton(string, &in) == 0) { + line_error(lineno, "Malformed range (malformed IP address)"); + } + + /* check that the IP address and the netmask match */ + if (rangesize != 32) { + /* not really the netmask, actually it's the inverted netmask */ + unsigned int netmask = htonl((1 << (31-rangesize)) - 1); + + if ((in.s_addr & netmask) != 0) { + line_error(lineno, "Malformed range (IP address doesn't match netmask)"); + } + } + + scan_range(in, rangesize); +} + +void line_error(int lineno, char *err_str) +{ + fprintf(stderr, "nbtscanner.conf:%d: %s\n", lineno, err_str); + exit(1); +} diff --git a/configfile.h b/configfile.h new file mode 100644 index 0000000..767d4be --- /dev/null +++ b/configfile.h @@ -0,0 +1,46 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * configfile.h: Prototypes for configfile.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _CONFIGFILE_H +#define _CONFIGFILE_H 1 + +extern int num_retries; +extern int retry_time; +extern int delay_time; +extern int verbosity; + +extern int use_mysql; +extern char mysql_host[64]; +extern char mysql_username[32]; +extern char mysql_password[32]; + +void parse_configfile(int do_scan); +void parse_line(char *buf, int lineno, int do_scan); +void parse_keyword(char *keyword, char *value, int lineno, int do_scan); +void parse_int(char *string, int *retval, int lineno); +void parse_range(char *string, int lineno); + +void line_error(int lineno, char *err_str); + +#endif diff --git a/id_list.c b/id_list.c new file mode 100644 index 0000000..36676d4 --- /dev/null +++ b/id_list.c @@ -0,0 +1,134 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * id_list.c: a singly linked list for keeping track of the packet IDs. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "id_list.h" +#include "configfile.h" +#include "util.h" + +#include +#include +#include +#include + +struct id_entry ids[65536]; +struct id_list_entry *head_free_id; +int num_free_ids; + +void id_list_init() +{ + int i, start_num; + + num_free_ids = 0; + head_free_id = NULL; + + /* we want to start at some halfway random number instead of 0 */ + start_num = (time(NULL) + getpid()) & 0xffff; + + for (i = 65535; i >= 0; i--) { + int ii = (i + start_num) & 0xffff; + + ids[ii].id = ii; + ids[ii].in_use = 0; + + id_free(&ids[ii]); + } +} + +void id_free(struct id_entry *i) +{ + struct id_list_entry *ie = (struct id_list_entry *)malloc(sizeof(struct id_list_entry)); + + if (ie == NULL) { + perror("malloc()"); + exit(1); + } + + i->in_use = 0; + ie->id = i; + + /* insert at the beginning of the linked list */ + ie->next = head_free_id; + head_free_id = ie; + + num_free_ids++; +} + +/* mark as free, but don't delete until desperation cleanup */ +void id_mark_free(struct id_entry *i) +{ + i->in_use = 2; + num_free_ids++; +} + +struct id_entry *id_get_free_id() +{ + struct id_list_entry *ie = head_free_id; + struct id_entry *i; + + if (ie == NULL) { + return NULL; + } else { + i = ie->id; + head_free_id = ie->next; + free(ie); + + i->in_use = 1; + num_free_ids--; + + return i; + } +} + +/* desperation time :-) */ +int id_cleanup(int timeout_ms) +{ + int i; + int num_freed = 0; + struct timeval now; + gettimeofday(&now, NULL); + + for (i = 0; i < 65536; i++) { + if (ids[i].in_use == 2) { + id_free(&ids[i]); + num_freed++; + num_free_ids--; /* was already counted */ + + continue; + } + if (mydifftime(ids[i].timestamp, now) > timeout_ms && + ids[i].retries == num_retries) { + id_free(&ids[i]); + num_freed++; + + continue; + } + } + + return num_freed; +} + +int get_num_free_ids() +{ + return num_free_ids; +} diff --git a/id_list.h b/id_list.h new file mode 100644 index 0000000..3a37d7b --- /dev/null +++ b/id_list.h @@ -0,0 +1,73 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * id_list.h: Prototypes and structures for keeping track of the packet IDs. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _ID_LIST_H +#define _ID_LIST_H 1 + +#include +#include + +/* + * There's quite some data duplication here, in the interest of speed and code + * simplicity. + */ + +struct id_entry { + unsigned short id; /* ID number from NBT packet */ + int in_use; /* Are we awaiting a reply on this ID? */ + + struct in_addr sin; /* IP address we've sent it to */ + struct timeval timestamp; /* When we sent the packet */ + int retries; /* Number of retries tried */ + + /* we list on index entry instead of using pointers */ + int prev_index; + int next_index; +}; + +struct id_list_entry { + struct id_list_entry *next; + struct id_entry *id; +}; + +/* + * a list of all the available ID numbers (sin is unused, in_use = 0) + * + * We could have a used_id list as well, but it would require a doubly + * linked list, and perhaps doesn't help all that much anyways + */ +extern struct id_list_entry *head_free_id; + +/* an array with a one-to-one mapping of the array index vs. the id field */ +extern struct id_entry ids[]; + +void id_list_init(); +void id_free(struct id_entry *i); +void id_mark_free(struct id_entry *i); +struct id_entry *id_get_free_id(); +int id_cleanup(int timeout_ms); +int get_num_free_ids(); + +#endif /* _ID_LIST_H */ + diff --git a/init.sql b/init.sql new file mode 100644 index 0000000..29b4a25 --- /dev/null +++ b/init.sql @@ -0,0 +1,17 @@ +USE mysql; +INSERT INTO mysql.user (Host, User, Password) VALUES('%', 'nbtscanner', PASSWORD('tg01')); +INSERT INTO mysql.user (Host, User, Password) VALUES('localhost', 'nbtscanner', PASSWORD('tg01')); +FLUSH PRIVILEGES; + +CREATE DATABASE nbtscanner; +USE nbtscanner; +CREATE TABLE nbtscanner ( + ip CHAR(16) NOT NULL, + hostname CHAR(32), + fileservername CHAR(32), + groupname CHAR(32), + PRIMARY KEY ( + ip + ) +); +GRANT INSERT, UPDATE, DELETE ON nbtscanner.nbtscanner TO nbtscanner@"%" IDENTIFIED BY 'tg01'; diff --git a/mysql_interface.c b/mysql_interface.c new file mode 100644 index 0000000..c51633a --- /dev/null +++ b/mysql_interface.c @@ -0,0 +1,138 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * mysql_interface.c: Interface routines for the MySQL table. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include + +#include "mysql_interface.h" +#include "configfile.h" + +MYSQL *mysql = NULL; + +/* veeeery detailed error reporting here ;-) */ +void init_mysql(char *host, char *username, char *password) +{ + if (mysql != NULL) return; /* hack */ + + mysql = mysql_init(NULL); + if (mysql == NULL) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_init() failed\n"); + } + exit(1); + } + + if (mysql_real_connect(mysql, mysql_host, username, password, "nbtscanner", + 0, NULL, 0) == 0) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_real_connect() failed\n"); + } + exit(1); + } +} + +void add_record_mysql(char *ip, char *hostname, char *fileservername, char *groupname) +{ + char query[256]; + snprintf(query, 256, + "REPLACE INTO nbtscanner.nbtscanner SET ip='%s', hostname='%s', fileservername='%s', groupname='%s';", + ip, hostname, fileservername, groupname); + + if (mysql_query(mysql, query) != 0) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_query(`%s') failed\n", query); + } + exit(1); + } +} + +void delete_record_mysql(char *ip) +{ + char query[256]; + snprintf(query, 256, + "DELETE FROM nbtscanner.nbtscanner WHERE ip='%s';", + ip); + + if (mysql_query(mysql, query) != 0) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_query(`%s') failed\n", query); + } + exit(1); + } +} + +void print_all_records_mysql() +{ + MYSQL_RES *result; + unsigned long *lengths; + unsigned int num_fields; + int i; + + if (mysql_query(mysql, "SELECT ip,fileservername,groupname,(fileservername <> '-unknown-nbtscanner-') FROM nbtscanner.nbtscanner;") != 0) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_query('SELECT ip'...) failed\n"); + } + exit(1); + } + + result = mysql_store_result(mysql); + if (result == NULL) { + if (verbosity >= 1) { + fprintf(stderr, "mysql_store_result() failed\n"); + } + exit(1); + } + + num_fields = mysql_num_fields(result); + while (1) { + MYSQL_ROW row = mysql_fetch_row(result); + if (row == NULL) return; + + lengths = mysql_fetch_lengths(result); + + for (i = 0; i < num_fields; i++) { + int j; + + /* strip away CR/LFs */ + for (j = 0; j < lengths[i]; j++) { + if (row[i][j] == 0 || row[i][j] == 10 || row[i][j] == 13) { + row[i][j] = '?'; + } + } + printf("%.*s", (int) lengths[i], row[i] ? row[i] : "NULL"); + if (i != num_fields - 1) putchar(0); + } + printf("\r\n"); + } +} + +void finish_mysql() +{ + /* don't care if this fails */ + mysql_query(mysql, "OPTIMIZE TABLE nbtscanner.nbtscanner;"); + + mysql_close(mysql); +} + diff --git a/mysql_interface.h b/mysql_interface.h new file mode 100644 index 0000000..26565dc --- /dev/null +++ b/mysql_interface.h @@ -0,0 +1,34 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * mysql_interface.c: Interface routines for the MySQL table. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _MYSQL_INTERFACE_H +#define _MYSQL_INTERFACE_H 1 + +void init_mysql(char *host, char *username, char *password); +void add_record_mysql(char *ip, char *hostname, char *fileservername, char *groupname); +void delete_record_mysql(char *ip); +void print_all_records_mysql(); +void finish_mysql(); + +#endif /* _MYSQL_INTERFACE_H */ diff --git a/nbtscanner.c b/nbtscanner.c new file mode 100644 index 0000000..a7c5e25 --- /dev/null +++ b/nbtscanner.c @@ -0,0 +1,338 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * nbtscanner.c: nbtscanner main body. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "nbtscanner.h" +#include "mysql_interface.h" +#include "configfile.h" +#include "nmb.h" +#include "socket.h" +#include "stats.h" +#include "packet.h" +#include "byteorder.h" +#include "util.h" +#include "id_list.h" + +/* one global variable -- the UDP socket */ +int server_fd; + +void interpret_node_status(char *p, struct in_addr in) +{ + int numnames = CVAL(p,0); + char hostname[32], fileservername[32], group[32]; + + /* + * hopefully this will be enough to identify the host as unknown + * (note that this is longer than the 16 char maximum NetBIOS + * name length) + */ + strcpy(hostname, "-unknown-nbtscanner-"); + strcpy(fileservername, "-unknown-nbtscanner-"); + strcpy(group, "-unknown-nbtscanner-"); + + p += 1; + while (numnames--) { + char qname[17]; + int type; + int i; + + strncpy(qname,p,15); + qname[15] = 0; + type = CVAL(p,15); + p += 16; + + for (i = strlen(qname); --i >= 0; ) { + if (!isprint((int)qname[i])) qname[i] = '.'; + } + + /* + * this is code duplication (see parse_nmb_name in nmb.c) + * but it obviously isn't done in our case :-) + */ + for (i = strlen(qname); --i >= 0; ) { + if (qname[i] == ' ') { + qname[i] = 0; + } else { + break; + } + } + + /* , non- server hostname (type 0x00) */ + if ((p[0] & 0x80) == 0x00 && ((p[0] & 0x1f) == 0x04) && type == 0x00) { + strcpy(hostname, qname); + } + /* , non- server hostname (type 0x20) */ + if ((p[0] & 0x80) == 0x00 && ((p[0] & 0x1f) == 0x04) && type == 0x20) { + strcpy(fileservername, qname); + } + /* , group (type 0x00) */ + if ((p[0] & 0x80) == 0x80 && ((p[0] & 0x1f) == 0x04) && type == 0x00) { + strcpy(group, qname); + } + + p += 2; + } + + if (use_mysql) { + add_record_mysql(inet_ntoa(in), hostname, fileservername, group); + } else { + printf("%s,%s,%s,%s\n", inet_ntoa(in), hostname, fileservername, group); + } +} + +void resend_timed_out_packets(int fd) +{ + int i; + struct timeval now; + struct nmb_packet nmb; + + gettimeofday(&now, NULL); + + for (i = 0; i < 65536; i++) { + if (ids[i].in_use == 1 && + mydifftime(ids[i].timestamp, now) > retry_time) { + if (ids[i].retries >= num_retries) { + id_mark_free(&ids[i]); + + num_failed++; + if (use_mysql) { + delete_record_mysql(inet_ntoa(ids[i].sin)); + } + print_stats(0); + } else { + gettimeofday(&(ids[i].timestamp), NULL); + ids[i].retries++; + num_sent_total++; + + build_nbt_packet(&nmb, i); + send_packet(&nmb, ids[i].sin, 137, fd); + recv_nbt_packets(fd); /* delay and empty buffer */ + print_stats(0); + } + } + } +} + +void send_nbt_packet(int fd, struct in_addr to_ip) +{ + struct nmb_packet nmb; + static int name_trn_id = 0; + struct id_entry *i = id_get_free_id(); + + if (i == NULL) { + /* uh-oh... try to remove timed-out IDs */ + if (id_cleanup(retry_time + 1000) == 0 || + (i=id_get_free_id()) == NULL) { + if (verbosity >= 1) { + fprintf(stderr, "No free NBT IDs! Reduce " + "the number of hosts, the " + "number\n"); + fprintf(stderr, "of retries, or the scanning " + "speed. nbtscanner is now " + "exiting.\n"); + } + exit(1); + } + } + name_trn_id = i->id; + i->sin = to_ip; + gettimeofday(&(i->timestamp), NULL); + i->retries = 0; + + build_nbt_packet(&nmb, name_trn_id); + + /* FIXME: what to do with sending errors? */ + send_packet(&nmb, to_ip, 137, fd); + + num_sent++; + num_sent_total++; + print_stats(0); +} + +/* + * This function not only receives and handles any NBT replies, but + * also guarantees a delay of minimum delay_time. + */ +void recv_nbt_packets(int fd) +{ + struct nmb_packet *nmb; + struct in_addr in; + struct timeval start; + int dt = delay_time; + + gettimeofday(&start, NULL); + + while (dt > 0) { + struct timeval now; + + print_stats(0); + + gettimeofday(&now, NULL); + dt = delay_time - mydifftime(start, now); + + if (dt < 0) break; + + nmb = receive_packet(fd, dt, &in); + if (nmb) { + struct id_entry *i = &ids[nmb->header.name_trn_id]; + + if (!nmb->header.response) { + /* It's not for us */ + free_nmb_packet(nmb); + continue; + } + if (i->in_use == 0) { + if (verbosity < 2) continue; + + fprintf(stderr, "Warning: received NBT " + "response for unused " + "id %04x!\n", + i->id); + continue; + } + if (i->in_use == 2) { + if (verbosity < 2) continue; + + fprintf(stderr, "Warning: received " + "duplicate NBT response " + "for id %04x!\n", + i->id); + continue; + } + if (in.s_addr != i->sin.s_addr) { + char got_addr[32], want_addr[32]; + + if (verbosity < 2) continue; + + strcpy(got_addr, inet_ntoa(in)); + strcpy(want_addr, inet_ntoa(i->sin)); + + fprintf(stderr, "Warning: received NBT " + "response for id %04x " + "from %s instead of %s!\n", + i->id, got_addr, want_addr); + continue; + } + + if (nmb->header.opcode != 0 || + nmb->header.nm_flags.bcast || + nmb->header.rcode || + !nmb->header.ancount || + nmb->answers->rr_type != 0x21) { + /* XXXX what do we do with this? could be a redirect, but + we'll discard it for the moment */ + free_nmb_packet(nmb); + continue; + } + + num_recv++; + num_recv_retries = i->retries; + + interpret_node_status(&nmb->answers->rdata[0], in); + free_nmb_packet(nmb); + + id_mark_free(i); + } + } +} + +void scan_range(struct in_addr ip, int rangesize) +{ + if (rangesize == 32) { + /* scan a single IP */ + send_nbt_packet(server_fd, ip); + recv_nbt_packets(server_fd); + } else if (rangesize == 31) { + /* scan two IPs */ + send_nbt_packet(server_fd, ip); + recv_nbt_packets(server_fd); + + ip.s_addr = htonl(ntohl(ip.s_addr) + 1); + send_nbt_packet(server_fd, ip); + recv_nbt_packets(server_fd); + } else { + /* scan a range of IPs, minus the top and bottom one */ + int i; + + ip.s_addr = htonl(ntohl(ip.s_addr) + 1); /* skip bottom */ + + for (i = 0; i < (1 << (32-rangesize)) - 2; i++) { + send_nbt_packet(server_fd, ip); + recv_nbt_packets(server_fd); + + ip.s_addr = htonl(ntohl(ip.s_addr) + 1); + } + } +} + +int main(int argc, char *argv[]) +{ + int fd = open_sockets(); + + id_list_init(); + init_stats(); + + /* note that parse_configfile() will call scan_range()! */ + server_fd = fd; + parse_configfile(1); + +/* for (i=1;i= 3) { + print_stats(1); + fprintf(stderr, "\n"); + } + + return 0; +} diff --git a/nbtscanner.conf b/nbtscanner.conf new file mode 100644 index 0000000..06da5e7 --- /dev/null +++ b/nbtscanner.conf @@ -0,0 +1,72 @@ +# +# nbtscanner.conf example +# +# Note that the config file scanner is not very smart, so you'd +# better be a bit restrictive here :-) (In particular, don't forget +# a newline at the end, and the ranges MUST come after the settings, +# otherwise you'll get slightly weird results :-) ) +# +# This file is case-insensitive. +# + +# The number of retries each host should be allowed to have. +num_retries=3 + +# The amount of time between each retry, in milliseconds. +retry_time=5000 + +# How long nbtscanner will delay between each sent packet, in ms. +delay_time=100 + +# Verbosity level: +# 0: Absolutely no warnings or error messages will be printed (not +# recommended, it's kinda nice to know why the program failed). +# 1: Fatal error messages will be printed on standard error. +# 2: Warnings (like suspicious NBT responses coming in, etc.) are +# also printed. +# 3: Errors, warnings and progress indicators. +# +# Config file errors are printed regardless of this setting. It's +# recommended that you redirect standard output to a file (or a +# pipe) if using verbosity >= 1. +# +verbosity=3 + +# +# MySQL setup +# +# If this is 1, a MySQL connection is used instead of outputting +# all the IPs to standard output. This is highly recommended, but +# needs some table setup before use. +# +use_mysql=1 + +# +# Your MySQL server information. mysql_host is the IP address (or +# host name) of your MySQL server, often localhost. mysql_username +# and password_username have obvious meanings. The password is in +# cleartext, so make sure the permissions on this file are set to +# 0600 or similiar. +# +mysql_host=127.0.0.1 +mysql_username=nbtscanner +mysql_password=tg01 + +# +# Each IP address range is specified with a range= parameter. +# There are three different ways to specify these: +# +# range=10.0.0.1 -- scan one IP address only. +# range=10.0.0.0/24 -- scan an entire C-net. +# range=10.0.0.0/255.255.255.0 -- the same, using netmask notation. +# +# If you specify networks, the top and bottom address will not be +# scanned. Netmasks must be filled from the left (if you don't have +# a VERY weird network layout, this will come naturally). +# +# Duplicate IP address _will_ be scanned twice. :-) +# +range=10.0.7.80/28 +# range=10.0.0.0/24 +range=10.0.19.0/24 + diff --git a/nbtscanner.h b/nbtscanner.h new file mode 100644 index 0000000..991bf45 --- /dev/null +++ b/nbtscanner.h @@ -0,0 +1,39 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * nbtscanner.c: Prototypes for nbtscanner.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _NBTSCANNER_H +#define _NBTSCANNER_H 1 + +#include + +void interpret_node_status(char *p, struct in_addr in); +void resend_timed_out_packets(int fd); +void send_nbt_packet(int fd, struct in_addr to_ip); +void recv_nbt_packets(int fd); + +void scan_range(struct in_addr ip, int rangesize); +int main(int argc, char *argv[]); + +#endif /* _NBTSCANNER_H */ + diff --git a/nmb.c b/nmb.c new file mode 100644 index 0000000..bb89ba9 --- /dev/null +++ b/nmb.c @@ -0,0 +1,354 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * nmb.c: Most functions directly related to the NMB protocol. + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include +#include +#include +#include + +#include "nmb.h" +#include "packet.h" +#include "byteorder.h" +#include "util.h" + +void build_nbt_packet(struct nmb_packet *nmb, int name_trn_id) +{ + nmb->header.name_trn_id = name_trn_id; + nmb->header.opcode = 0; + nmb->header.response = 0; + nmb->header.nm_flags.bcast = 0; + nmb->header.nm_flags.recursion_available = 0; + nmb->header.nm_flags.recursion_desired = 0; + nmb->header.nm_flags.trunc = 0; + nmb->header.nm_flags.authoritative = 0; + nmb->header.rcode = 0; + nmb->header.qdcount = 1; + nmb->header.ancount = 0; + nmb->header.nscount = 0; + nmb->header.arcount = 0; + + make_nmb_name(&(nmb->question.question_name), "*", 0x0, ""); + + nmb->question.question_type = 0x21; + nmb->question.question_class = 0x1; +} + +int build_nmb(char *buf, struct nmb_packet *nmb) +{ + unsigned char *ubuf = (unsigned char *)buf; + int offset=0; + + /* put in the header */ + RSSVAL(ubuf,offset, nmb->header.name_trn_id); + ubuf[offset+2] = (nmb->header.opcode & 0xF) << 3; + if (nmb->header.response) ubuf[offset+2] |= (1<<7); + if (nmb->header.nm_flags.authoritative && + nmb->header.response) ubuf[offset+2] |= 0x4; + if (nmb->header.nm_flags.trunc) ubuf[offset+2] |= 0x2; + if (nmb->header.nm_flags.recursion_desired) ubuf[offset+2] |= 0x1; + if (nmb->header.nm_flags.recursion_available && + nmb->header.response) ubuf[offset+3] |= 0x80; + if (nmb->header.nm_flags.bcast) ubuf[offset+3] |= 0x10; + ubuf[offset+3] |= (nmb->header.rcode & 0xF); + + RSSVAL(ubuf, offset+4, nmb->header.qdcount); + RSSVAL(ubuf, offset+6, nmb->header.ancount); + RSSVAL(ubuf, offset+8, nmb->header.nscount); + RSSVAL(ubuf, offset+10, nmb->header.arcount); + + offset += 12; + if (nmb->header.qdcount) { + /* XXXX this doesn't handle a qdcount of > 1 */ + offset += put_nmb_name((char *)ubuf, offset, &nmb->question.question_name); + RSSVAL(ubuf,offset, nmb->question.question_type); + RSSVAL(ubuf,offset+2, nmb->question.question_class); + offset += 4; + } + return offset; +} + +int parse_nmb(char *inbuf, int length, struct nmb_packet *nmb) +{ + int nm_flags, offset; + + memset((char *)nmb, 0, sizeof(*nmb)); + + if (length < 12) return(0); + + /* parse the header */ + nmb->header.name_trn_id = RSVAL(inbuf, 0); + + nmb->header.opcode = (CVAL(inbuf, 2) >> 3) & 0xF; + nmb->header.response = ((CVAL(inbuf, 2) >> 7) & 1) ? 1 : 0; + nm_flags = ((CVAL(inbuf, 2) & 0x7) << 4) + (CVAL(inbuf, 3) >> 4); + nmb->header.nm_flags.bcast = (nm_flags & 1) ? 1 : 0; + nmb->header.nm_flags.recursion_available = (nm_flags & 8) ? 1 : 0; + nmb->header.nm_flags.recursion_desired = (nm_flags & 0x10) ? 1 : 0; + nmb->header.nm_flags.trunc = (nm_flags & 0x20) ? 1 : 0; + nmb->header.nm_flags.authoritative = (nm_flags & 0x40) ? 1 : 0; + nmb->header.rcode = CVAL(inbuf, 3) & 0xF; + nmb->header.qdcount = RSVAL(inbuf, 4); + nmb->header.ancount = RSVAL(inbuf, 6); + nmb->header.nscount = RSVAL(inbuf, 8); + nmb->header.arcount = RSVAL(inbuf, 10); + + if (nmb->header.qdcount) { + offset = parse_nmb_name(inbuf, 12, length, &nmb->question.question_name); + if (!offset) return 0; + + if (length - (12+offset) < 4) return 0; + nmb->question.question_type = RSVAL(inbuf, 12+offset); + nmb->question.question_class = RSVAL(inbuf, 12+offset+2); + + offset += 12+4; + } else { + offset = 12; + } + + /* and any resource records */ + if (nmb->header.ancount && + !parse_alloc_res_rec(inbuf, &offset, length, &nmb->answers, + nmb->header.ancount)) { + return 0; + } + + if (nmb->header.nscount && + !parse_alloc_res_rec(inbuf, &offset, length, &nmb->nsrecs, + nmb->header.nscount)) { + return 0; + } + + if (nmb->header.arcount && + !parse_alloc_res_rec(inbuf, &offset, length, &nmb->additional, + nmb->header.arcount)) { + return 0; + } + + return 1; +} + +void make_nmb_name(struct nmb_name *n, const char *name, int type, const char *this_scope) +{ + memset((char *)n, 0, sizeof(struct nmb_name)); + strncpy(n->name, name, 15); + strupper(n->name); + n->name_type = (unsigned int)type & 0xFF; + strncpy(n->scope, this_scope, 63); + strupper(n->scope); +} + +int parse_nmb_name(char *inbuf, int offset, int length, struct nmb_name *name) +{ + int m, n = 0; + unsigned char *ubuf = (unsigned char *)inbuf; + int ret = 0; + int got_pointer = 0; + int loop_count = 0; + + if (length - offset < 2) + return 0; + + /* handle initial name pointers */ + if (!handle_name_ptrs(ubuf, &offset, length, &got_pointer, &ret)) + return 0; + + m = ubuf[offset]; + + if (!m) + return 0; + if ((m & 0xC0) || offset+m+2 > length) + return 0; + + memset((char *)name, 0, sizeof(*name)); + + /* the "compressed" part */ + if (!got_pointer) + ret += m + 2; + offset++; + + while (m > 0) { + unsigned char c1,c2; + c1 = ubuf[offset++]-'A'; + c2 = ubuf[offset++]-'A'; + if ((c1 & 0xF0) || (c2 & 0xF0) || (n > sizeof(name->name)-1)) + return 0; + name->name[n++] = (c1<<4) | c2; + m -= 2; + } + name->name[n] = 0; + + if (n==16) { + /* parse out the name type, + its always in the 16th byte of the name */ + name->name_type = ((unsigned char)name->name[15]) & 0xff; + + /* remove trailing spaces */ + name->name[15] = 0; + n = 14; + while (n && name->name[n]==' ') + name->name[n--] = 0; + } + + /* now the domain parts (if any) */ + n = 0; + while (ubuf[offset]) { + /* we can have pointers within the domain part as well */ + if (!handle_name_ptrs(ubuf,&offset,length,&got_pointer,&ret)) + return 0; + + m = ubuf[offset]; + /* + * Don't allow null domain parts. + */ + if (!m) + return 0; + if (!got_pointer) + ret += m+1; + if (n) + name->scope[n++] = '.'; + if (m + 2 + offset > length || n + m + 1 > sizeof(name->scope)) + return 0; + offset++; + while (m--) + name->scope[n++] = (char)ubuf[offset++]; + + /* + * Watch for malicious loops. + */ + if (loop_count++ == 10) + return 0; + } + name->scope[n++] = 0; + + return ret; +} + +int put_nmb_name(char *buf, int offset, struct nmb_name *name) +{ + int ret,m; + char buf1[128]; + char *p; + + if (strcmp(name->name,"*") == 0) { + /* special case for wildcard name */ + memset(buf1,'\0',20); + buf1[0] = '*'; + buf1[15] = name->name_type; + } else { + snprintf(buf1, sizeof(buf1) - 1,"%-15.15s%c",name->name,name->name_type); + } + + buf[offset] = 0x20; + ret = 34; + + for (m=0; m<16; m++) { + buf[offset + 1 + 2*m] = 'A' + ((buf1[m] >> 4) & 0xF); + buf[offset + 2 + 2*m] = 'A' + ( buf1[m] & 0xF); + } + offset += 33; + + buf[offset] = 0; + + if (name->scope[0]) { + /* XXXX this scope handling needs testing */ + ret += strlen(name->scope) + 1; + strcpy(&buf[offset + 1], name->scope); + + p = &buf[offset + 1]; + while ((p = strchr(p, '.'))) { + buf[offset] = PTR_DIFF(p, &buf[offset]); + offset += buf[offset]; + p = &buf[offset+1]; + } + buf[offset] = strlen(&buf[offset+1]); + } + + return ret; +} + +int handle_name_ptrs(unsigned char *ubuf, int *offset, int length, + int *got_pointer, int *ret) +{ + int loop_count=0; + + while ((ubuf[*offset] & 0xC0) == 0xC0) { + if (!*got_pointer) (*ret) += 2; + (*got_pointer) = 1; + (*offset) = ((ubuf[*offset] & ~0xC0) << 8) | ubuf[(*offset)+1]; + if (loop_count++ == 10 || (*offset) < 0 || (*offset) > (length-2)) { + return 0; + } + } + return 1; +} + +int parse_alloc_res_rec(char *inbuf, int *offset, int length, + struct res_rec **recs, int count) +{ + int i; + *recs = (struct res_rec *)malloc(sizeof(**recs) * count); + if (!*recs) return 0; + + memset((char *)*recs, 0, sizeof(**recs) * count); + + for (i=0; i length) { + free(*recs); + *recs = NULL; + return 0; + } + (*recs)[i].rr_type = RSVAL(inbuf, (*offset)); + (*recs)[i].rr_class = RSVAL(inbuf, (*offset)+2); + (*recs)[i].ttl = RIVAL(inbuf, (*offset)+4); + (*recs)[i].rdlength = RSVAL(inbuf, (*offset)+8); + (*offset) += 10; + if ((*recs)[i].rdlength > sizeof((*recs)[i].rdata) || + (*offset)+(*recs)[i].rdlength > length) { + free(*recs); + *recs = NULL; + return 0; + } + memcpy((*recs)[i].rdata, inbuf+(*offset), (*recs)[i].rdlength); + (*offset) += (*recs)[i].rdlength; + } + return 0; +} + +void free_nmb_packet(struct nmb_packet *nmb) +{ + if (nmb->answers) { + free(nmb->answers); + nmb->answers = NULL; + } + if (nmb->nsrecs) { + free(nmb->nsrecs); + nmb->nsrecs = NULL; + } + if (nmb->additional) { + free(nmb->additional); + nmb->additional = NULL; + } + free(nmb); +} + diff --git a/nmb.h b/nmb.h new file mode 100644 index 0000000..5b4e569 --- /dev/null +++ b/nmb.h @@ -0,0 +1,42 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * nmb.h: Prototypes for nmb.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _NMB_H +#define _NMB_H 1 + +#include "packet.h" + +void build_nbt_packet(struct nmb_packet *nmb, int name_trn_id); +int put_nmb_name(char *buf, int offset, struct nmb_name *name); +int build_nmb(char *buf, struct nmb_packet *nmb); +int parse_nmb(char *inbuf, int length, struct nmb_packet *nmb); +void make_nmb_name(struct nmb_name *n, const char *name, int type, const char *this_scope); +int parse_nmb_name(char *inbuf,int offset,int length, struct nmb_name *name); +int handle_name_ptrs(unsigned char *ubuf, int *offset, int length, + int *got_pointer, int *ret); +int parse_alloc_res_rec(char *inbuf, int *offset, int length, + struct res_rec **recs, int count); +void free_nmb_packet(struct nmb_packet *nmb); + +#endif /* _NMB_H */ diff --git a/outputfile.c b/outputfile.c new file mode 100644 index 0000000..90efe58 --- /dev/null +++ b/outputfile.c @@ -0,0 +1,57 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * outputfile.c: nbtscanner text file output. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mysql_interface.h" +#include "configfile.h" + +int main(int argc, char *argv[]) +{ + parse_configfile(0); + + if (!use_mysql) { + if (verbosity >= 1) { + fprintf(stderr, "Eeeeh, you have disabled MySQL! :-)\n"); + } + exit(1); + } + + print_all_records_mysql(); + finish_mysql(); + + return 0; +} + +/* will never be called */ +void scan_range(struct in_addr ip, int rangesize) {} diff --git a/packet.h b/packet.h new file mode 100644 index 0000000..c7c889c --- /dev/null +++ b/packet.h @@ -0,0 +1,76 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * packet.h: NMB/NBT packet structure definitions. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _PACKET_H +#define _PACKET_H 1 + +#define MAX_DGRAM_SIZE 576 +#define MIN_DGRAM_SIZE 12 + +struct nmb_name { + char name[17]; + char scope[64]; + unsigned int name_type; +}; + +struct res_rec { + struct nmb_name rr_name; + int rr_type; + int rr_class; + int ttl; + int rdlength; + char rdata[MAX_DGRAM_SIZE]; +}; + +struct nmb_packet { + struct { + int name_trn_id; + int opcode; + int response; + struct { + int bcast; + int recursion_available; + int recursion_desired; + int trunc; + int authoritative; + } nm_flags; + int rcode; + int qdcount; + int ancount; + int nscount; + int arcount; + } header; + + struct { + struct nmb_name question_name; + int question_type; + int question_class; + } question; + + struct res_rec *answers; + struct res_rec *nsrecs; + struct res_rec *additional; +}; + +#endif /* _PACKET_H */ diff --git a/socket.c b/socket.c new file mode 100644 index 0000000..4252e48 --- /dev/null +++ b/socket.c @@ -0,0 +1,158 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * socket.c: Most functions that are related to TCP/IP (socket) use. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* + * This file is probably the most platform-dependent one, and would most + * likely be needed to undergo some changes if ported to another OS than + * the ones using BSD-style sockets (Winsock is a variant of these, + * by the way -- you may only want to change some header files and add some + * extra initialization calls). + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "socket.h" +#include "nmb.h" +#include "packet.h" + +int open_sockets(void) +{ + unsigned int one = 1; + struct sockaddr_in sin; + int sock; + + memset((char *)&sin, 0, sizeof(sin)); + sin.sin_port = htons(0); + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = INADDR_ANY; + + sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (sock == -1) { + perror("socket()"); + exit(0); + } + + setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof(one)); + + /* bind the socket */ + if (bind(sock, (struct sockaddr *) &sin,sizeof(sin)) < 0) { + perror("bind()"); + exit(1); + } + + return sock; +} + +int send_packet(struct nmb_packet *nmb, struct in_addr ip, int port, int fd) +{ + char buf[1024]; + int len = 0; + + memset(buf, 0, sizeof(buf)); + + len = build_nmb(buf,nmb); + if (!len) return(0); + + return(send_udp(fd,buf,len,ip,port)); +} + +struct nmb_packet *receive_packet(int fd, int t, struct in_addr *in) +{ + fd_set fds; + struct timeval timeout; + + FD_ZERO(&fds); + FD_SET(fd,&fds); + timeout.tv_sec = t / 1000; + timeout.tv_usec = 1000 * (t % 1000); + + select(fd+1,&fds,NULL,NULL,&timeout); + + if (FD_ISSET(fd,&fds)) + return read_packet(fd, in); + + return(NULL); +} + +struct nmb_packet *read_packet(int fd, struct in_addr *in) +{ + /* extern struct in_addr lastip; + extern int lastport; */ + char buf[MAX_DGRAM_SIZE]; + int length; + int ok = 0; + struct nmb_packet *nmb; + + length = read_udp_socket(fd, buf, sizeof(buf), in); + if (length < MIN_DGRAM_SIZE) return(NULL); + + nmb = (struct nmb_packet *)malloc(sizeof(struct nmb_packet)); /* ?? */ + ok = parse_nmb(buf, length, nmb); + + return(nmb); +} + +int send_udp(int fd,char *buf,int len,struct in_addr ip,int port) +{ + int ret; + struct sockaddr_in sock_out; + + /* set the address and port */ + memset((char *)&sock_out, 0, sizeof(sock_out)); + memcpy((char *)&sock_out.sin_addr, (char *)&ip, 4); + sock_out.sin_port = htons(port); + sock_out.sin_family = AF_INET; + + ret = (sendto(fd,buf,len,0,(struct sockaddr *)&sock_out, + sizeof(sock_out)) >= 0); + + return ret; +} + +ssize_t read_udp_socket(int fd, char *buf, size_t len, struct in_addr *in) +{ + ssize_t ret; + struct sockaddr_in sin; + int sin_len; + + sin_len = sizeof(sin); + memset((char *)&sin, 0, sin_len); + ret = (ssize_t)recvfrom(fd, buf, len, 0, (struct sockaddr *)&sin, &sin_len); + if (ret <= 0) { + perror("recvfrom()"); + return(0); + } + + *in = sin.sin_addr; + + return ret; +} + + diff --git a/socket.h b/socket.h new file mode 100644 index 0000000..2e21dc1 --- /dev/null +++ b/socket.h @@ -0,0 +1,39 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * socket.h: Prototypes for socket.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _SOCKET_H +#define _SOCKET_H 1 + +#include "packet.h" + +#include + +int open_sockets(void); +int send_packet(struct nmb_packet *nmb, struct in_addr ip, int port, int fd); +struct nmb_packet *receive_packet(int fd, int t, struct in_addr *in); +struct nmb_packet *read_packet(int fd, struct in_addr *in); +int send_udp(int fd, char *buf, int len, struct in_addr ip, int port); +ssize_t read_udp_socket(int fd, char *buf, size_t len, struct in_addr *in); + +#endif /* _SOCKET_H */ diff --git a/stats.c b/stats.c new file mode 100644 index 0000000..925d62c --- /dev/null +++ b/stats.c @@ -0,0 +1,68 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * stats.c: Running statistics. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "stats.h" +#include "configfile.h" +#include "util.h" + +#include +#include + +int num_recv; +int num_recv_retries; +int num_failed; +int num_sent; +int num_sent_total; +enum statuses status; + +struct timeval last_stats; + +void init_stats() +{ + num_recv = 0; + num_recv_retries = 0; + num_failed = 0; + num_sent = 0; + num_sent_total = 0; + status = SCANNING; + + gettimeofday(&last_stats, NULL); +} + +void print_stats(int force) +{ + struct timeval now; + + gettimeofday(&now, NULL); + if (verbosity >= 3 && (mydifftime(last_stats, now) > 1000 || force == 1)) { + fprintf(stderr, "%s: Received %5u/%5u/%5u (%5u failed) (avg. " + "retries/succ.: %3.2f)\r", + (status == SCANNING) ? "Scanning" : "Retrying", + num_recv, num_sent, num_sent_total, num_failed, + (float)num_recv_retries / (float)num_recv); + + gettimeofday(&last_stats, NULL); + } +} + diff --git a/stats.h b/stats.h new file mode 100644 index 0000000..4723a1d --- /dev/null +++ b/stats.h @@ -0,0 +1,44 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * stats.h: Definitions and prototypes for stats.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _STATS_H +#define _STATS_H 1 + +extern int num_recv; +extern int num_recv_retries; +extern int num_failed; +extern int num_sent; +extern int num_sent_total; + +enum statuses { + SCANNING, + RETRYING +}; + +extern enum statuses status; + +void init_stats(); +void print_stats(int force); + +#endif /* _STATS_H */ diff --git a/util.c b/util.c new file mode 100644 index 0000000..9b476cf --- /dev/null +++ b/util.c @@ -0,0 +1,38 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * util.c: Useful small functions. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include + +void strupper(char *s) +{ + while (*s) { *s = toupper(*s); s++; } +} + +int mydifftime(struct timeval t1, struct timeval t2) +{ + return (t2.tv_sec - t1.tv_sec) * 1000 + + (t2.tv_usec - t1.tv_usec) / 1000; +} + diff --git a/util.h b/util.h new file mode 100644 index 0000000..2af4e9d --- /dev/null +++ b/util.h @@ -0,0 +1,33 @@ +/* + * nbtscanner -- a tool for scanning large networks for SMB servers. + * + * string_util.h: Function prototypes for string_util.c. + * Copyright (C) 2000 Steinar H. Gunderson + * + * Large amounts of code adapted from Samba (http://www.samba.org/) + * Copyright (C) Andrew Tridgell 1994-1998, and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _STRING_UTIL_H +#define _STRING_UTIL_H 1 + +#include + +void strupper(char *s); +int mydifftime(struct timeval t1, struct timeval t2); + +#endif /* STRING_UTIL_H */ -- 2.39.2