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934b92f5d0
always consistent. Return -1 on error, and ensure
we check for this. In cases where the dest is already
specified and we've been asked to terminate with a
null, ensure we always do so even on error.
Jeremy.
(This used to be commit abedd96786
)
592 lines
15 KiB
C
592 lines
15 KiB
C
/*
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Unix SMB/CIFS implementation.
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NBT netbios routines and daemon - version 2
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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Copyright (C) Jeremy Allison 1994-2003
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Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Revision History:
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*/
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#include "includes.h"
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struct sam_database_info {
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uint32 index;
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uint32 serial_lo, serial_hi;
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uint32 date_lo, date_hi;
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};
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/****************************************************************************
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Process a domain logon packet
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**************************************************************************/
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void process_logon_packet(struct packet_struct *p, char *buf,int len,
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const char *mailslot)
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{
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struct dgram_packet *dgram = &p->packet.dgram;
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pstring my_name;
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fstring reply_name;
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pstring outbuf;
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int code;
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uint16 token = 0;
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uint32 ntversion = 0;
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uint16 lmnttoken = 0;
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uint16 lm20token = 0;
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uint32 domainsidsize;
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BOOL short_request = False;
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char *getdc;
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char *uniuser; /* Unicode user name. */
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pstring ascuser;
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char *unicomp; /* Unicode computer name. */
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size_t size;
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memset(outbuf, 0, sizeof(outbuf));
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if (!lp_domain_logons()) {
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DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
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logons are not enabled.\n", inet_ntoa(p->ip) ));
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return;
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}
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pstrcpy(my_name, global_myname());
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code = get_safe_SVAL(buf,len,buf,0,-1);
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DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
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switch (code) {
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case 0:
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{
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fstring mach_str, user_str, getdc_str;
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char *q = buf + 2;
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char *machine = q;
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char *user = skip_string(buf,len,machine);
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if (!user || PTR_DIFF(user, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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getdc = skip_string(buf,len,user);
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if (!getdc || PTR_DIFF(getdc, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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q = skip_string(buf,len,getdc);
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if (!q || PTR_DIFF(q + 5, buf) > len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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token = SVAL(q,3);
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fstrcpy(reply_name,my_name);
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pull_ascii_fstring(mach_str, machine);
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pull_ascii_fstring(user_str, user);
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pull_ascii_fstring(getdc_str, getdc);
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DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
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mach_str,inet_ntoa(p->ip),user_str,token));
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q = outbuf;
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SSVAL(q, 0, 6);
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q += 2;
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fstrcpy(reply_name, "\\\\");
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fstrcat(reply_name, my_name);
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size = push_ascii(q,reply_name,
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sizeof(outbuf)-PTR_DIFF(q, outbuf),
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STR_TERMINATE);
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if (size == (size_t)-1) {
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return;
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}
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q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
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SSVAL(q, 0, token);
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q += 2;
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dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
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send_mailslot(True, getdc_str,
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outbuf,PTR_DIFF(q,outbuf),
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global_myname(), 0x0,
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mach_str,
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dgram->source_name.name_type,
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p->ip, *iface_ip(p->ip), p->port);
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break;
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}
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case QUERYFORPDC:
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{
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fstring mach_str, getdc_str;
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fstring source_name;
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char *q = buf + 2;
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char *machine = q;
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if (!lp_domain_master()) {
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/* We're not Primary Domain Controller -- ignore this */
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return;
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}
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getdc = skip_string(buf,len,machine);
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if (!getdc || PTR_DIFF(getdc, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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q = skip_string(buf,len,getdc);
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if (!q || PTR_DIFF(q, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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q = ALIGN2(q, buf);
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/* At this point we can work out if this is a W9X or NT style
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request. Experiments show that the difference is wether the
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packet ends here. For a W9X request we now end with a pair of
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bytes (usually 0xFE 0xFF) whereas with NT we have two further
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strings - the following is a simple way of detecting this */
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if (len - PTR_DIFF(q, buf) <= 3) {
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short_request = True;
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} else {
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unicomp = q;
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if (PTR_DIFF(q, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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/* A full length (NT style) request */
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q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
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if (PTR_DIFF(q, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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if (len - PTR_DIFF(q, buf) > 8) {
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/* with NT5 clients we can sometimes
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get additional data - a length specificed string
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containing the domain name, then 16 bytes of
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data (no idea what it is) */
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int dom_len = CVAL(q, 0);
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q++;
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if (dom_len != 0) {
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q += dom_len + 1;
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}
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q += 16;
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}
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if (PTR_DIFF(q + 8, buf) > len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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ntversion = IVAL(q, 0);
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lmnttoken = SVAL(q, 4);
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lm20token = SVAL(q, 6);
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}
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/* Construct reply. */
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q = outbuf;
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SSVAL(q, 0, QUERYFORPDC_R);
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q += 2;
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fstrcpy(reply_name,my_name);
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size = push_ascii(q, reply_name,
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sizeof(outbuf)-PTR_DIFF(q, outbuf),
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STR_TERMINATE);
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if (size == (size_t)-1) {
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return;
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}
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q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
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/* PDC and domain name */
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if (!short_request) {
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/* Make a full reply */
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q = ALIGN2(q, outbuf);
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q += dos_PutUniCode(q, my_name,
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sizeof(pstring) - PTR_DIFF(q, outbuf),
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True); /* PDC name */
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q += dos_PutUniCode(q, lp_workgroup(),
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sizeof(pstring) - PTR_DIFF(q, outbuf),
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True); /* Domain name*/
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if (sizeof(pstring) - PTR_DIFF(q, outbuf) < 8) {
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return;
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}
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SIVAL(q, 0, 1); /* our nt version */
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SSVAL(q, 4, 0xffff); /* our lmnttoken */
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SSVAL(q, 6, 0xffff); /* our lm20token */
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q += 8;
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}
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/* RJS, 21-Feb-2000, we send a short reply if the request was short */
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pull_ascii_fstring(mach_str, machine);
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DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
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reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
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mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
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QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
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(uint32)lm20token ));
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dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
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pull_ascii_fstring(getdc_str, getdc);
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pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
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send_mailslot(True, getdc_str,
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outbuf,PTR_DIFF(q,outbuf),
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global_myname(), 0x0,
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source_name,
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dgram->source_name.name_type,
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p->ip, *iface_ip(p->ip), p->port);
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return;
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}
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case SAMLOGON:
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{
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fstring getdc_str;
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fstring source_name;
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char *q = buf + 2;
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fstring asccomp;
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q += 2;
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if (PTR_DIFF(q, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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unicomp = q;
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uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
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if (PTR_DIFF(uniuser, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
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if (PTR_DIFF(getdc, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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q = skip_string(buf,len,getdc);
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if (!q || PTR_DIFF(q + 8, buf) >= len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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q += 4; /* Account Control Bits - indicating username type */
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domainsidsize = IVAL(q, 0);
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q += 4;
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DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
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if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
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q += domainsidsize;
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q = ALIGN4(q, buf);
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}
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DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
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if (len - PTR_DIFF(q, buf) > 8) {
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/* with NT5 clients we can sometimes
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get additional data - a length specificed string
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containing the domain name, then 16 bytes of
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data (no idea what it is) */
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int dom_len = CVAL(q, 0);
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q++;
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if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
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q += dom_len + 1;
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}
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q += 16;
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}
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if (PTR_DIFF(q + 8, buf) > len) {
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DEBUG(0,("process_logon_packet: bad packet\n"));
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return;
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}
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ntversion = IVAL(q, 0);
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lmnttoken = SVAL(q, 4);
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lm20token = SVAL(q, 6);
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q += 8;
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DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
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/*
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* we respond regadless of whether the machine is in our password
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* database. If it isn't then we let smbd send an appropriate error.
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* Let's ignore the SID.
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*/
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pull_ucs2_pstring(ascuser, uniuser);
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pull_ucs2_fstring(asccomp, unicomp);
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DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
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fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
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fstrcat(reply_name, my_name);
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DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
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asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
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SAMLOGON_R ,lmnttoken));
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/* Construct reply. */
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q = outbuf;
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/* we want the simple version unless we are an ADS PDC..which means */
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/* never, at least for now */
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if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
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if (SVAL(uniuser, 0) == 0) {
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SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
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} else {
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SSVAL(q, 0, SAMLOGON_R);
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}
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q += 2;
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q += dos_PutUniCode(q, reply_name,
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sizeof(pstring) - PTR_DIFF(q, outbuf),
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True);
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q += dos_PutUniCode(q, ascuser,
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sizeof(pstring) - PTR_DIFF(q, outbuf),
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True);
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q += dos_PutUniCode(q, lp_workgroup(),
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sizeof(pstring) - PTR_DIFF(q, outbuf),
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True);
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}
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#ifdef HAVE_ADS
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else {
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struct GUID domain_guid;
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UUID_FLAT flat_guid;
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pstring domain;
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pstring hostname;
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char *component, *dc, *q1;
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char *q_orig = q;
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int str_offset;
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get_mydnsdomname(domain);
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get_myname(hostname);
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
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return;
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}
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if (SVAL(uniuser, 0) == 0) {
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SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
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} else {
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SIVAL(q, 0, SAMLOGON_AD_R);
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}
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q += 4;
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SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
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ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
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q += 4;
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/* Push Domain GUID */
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
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return;
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}
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if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
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DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
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return;
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}
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smb_uuid_pack(domain_guid, &flat_guid);
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memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
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q += UUID_FLAT_SIZE;
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/* Forest */
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str_offset = q - q_orig;
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dc = domain;
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q1 = q;
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while ((component = strtok(dc, "."))) {
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dc = NULL;
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
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return;
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}
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size = push_ascii(&q[1], component,
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sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
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0);
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if (size == (size_t)-1 || size > 0xff) {
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return;
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}
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SCVAL(q, 0, size);
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q += (size + 1);
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}
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/* Unk0 */
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
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return;
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}
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SCVAL(q, 0, 0);
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q++;
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/* Domain */
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SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
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SCVAL(q, 1, str_offset & 0xFF);
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q += 2;
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/* Hostname */
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size = push_ascii(&q[1], hostname,
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sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
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0);
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if (size == (size_t)-1 || size > 0xff) {
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return;
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}
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SCVAL(q, 0, size);
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q += (size + 1);
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
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return;
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}
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SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
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SCVAL(q, 1, str_offset & 0xFF);
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q += 2;
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/* NETBIOS of domain */
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size = push_ascii(&q[1], lp_workgroup(),
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sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
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STR_UPPER);
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if (size == (size_t)-1 || size > 0xff) {
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return;
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}
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SCVAL(q, 0, size);
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q += (size + 1);
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/* Unk1 */
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
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return;
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}
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SCVAL(q, 0, 0);
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q++;
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/* NETBIOS of hostname */
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size = push_ascii(&q[1], my_name,
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sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
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0);
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if (size == (size_t)-1 || size > 0xff) {
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return;
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}
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SCVAL(q, 0, size);
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q += (size + 1);
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/* Unk2 */
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if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
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return;
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|
}
|
|
|
|
SCVAL(q, 0, 0);
|
|
q++;
|
|
|
|
/* User name */
|
|
if (SVAL(uniuser, 0) != 0) {
|
|
size = push_ascii(&q[1], ascuser,
|
|
sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
|
|
0);
|
|
if (size == (size_t)-1 || size > 0xff) {
|
|
return;
|
|
}
|
|
SCVAL(q, 0, size);
|
|
q += (size + 1);
|
|
}
|
|
|
|
q_orig = q;
|
|
/* Site name */
|
|
if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
|
|
return;
|
|
}
|
|
size = push_ascii(&q[1], "Default-First-Site-Name",
|
|
sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
|
|
0);
|
|
if (size == (size_t)-1 || size > 0xff) {
|
|
return;
|
|
}
|
|
SCVAL(q, 0, size);
|
|
q += (size + 1);
|
|
|
|
if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
|
|
return;
|
|
}
|
|
|
|
/* Site name (2) */
|
|
str_offset = q - q_orig;
|
|
SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
|
|
SCVAL(q, 1, str_offset & 0xFF);
|
|
q += 2;
|
|
|
|
SCVAL(q, 0, PTR_DIFF(q,q1));
|
|
SCVAL(q, 1, 0x10); /* unknown */
|
|
|
|
SIVAL(q, 0, 0x00000002);
|
|
q += 4; /* unknown */
|
|
SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
|
|
q += 4;
|
|
SIVAL(q, 0, 0x00000000);
|
|
q += 4; /* unknown */
|
|
SIVAL(q, 0, 0x00000000);
|
|
q += 4; /* unknown */
|
|
}
|
|
#endif
|
|
|
|
if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
|
|
return;
|
|
}
|
|
|
|
/* tell the client what version we are */
|
|
SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
|
|
/* our ntversion */
|
|
SSVAL(q, 4, 0xffff); /* our lmnttoken */
|
|
SSVAL(q, 6, 0xffff); /* our lm20token */
|
|
q += 8;
|
|
|
|
dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
|
|
|
|
pull_ascii_fstring(getdc_str, getdc);
|
|
pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
|
|
|
|
send_mailslot(True, getdc,
|
|
outbuf,PTR_DIFF(q,outbuf),
|
|
global_myname(), 0x0,
|
|
source_name,
|
|
dgram->source_name.name_type,
|
|
p->ip, *iface_ip(p->ip), p->port);
|
|
break;
|
|
}
|
|
|
|
/* Announce change to UAS or SAM. Send by the domain controller when a
|
|
replication event is required. */
|
|
|
|
case SAM_UAS_CHANGE:
|
|
DEBUG(5, ("Got SAM_UAS_CHANGE\n"));
|
|
break;
|
|
|
|
default:
|
|
DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
|
|
return;
|
|
}
|
|
}
|