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-rw-r--r--source3/nmbd/nmbd_processlogon.c695
1 files changed, 695 insertions, 0 deletions
diff --git a/source3/nmbd/nmbd_processlogon.c b/source3/nmbd/nmbd_processlogon.c
new file mode 100644
index 0000000000..474ae1ca18
--- /dev/null
+++ b/source3/nmbd/nmbd_processlogon.c
@@ -0,0 +1,695 @@
+/*
+ Unix SMB/CIFS implementation.
+ NBT netbios routines and daemon - version 2
+ Copyright (C) Andrew Tridgell 1994-1998
+ Copyright (C) Luke Kenneth Casson Leighton 1994-1998
+ Copyright (C) Jeremy Allison 1994-2003
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+
+ Revision History:
+
+*/
+
+#include "includes.h"
+
+struct sam_database_info {
+ uint32 index;
+ uint32 serial_lo, serial_hi;
+ uint32 date_lo, date_hi;
+};
+
+/**
+ * check whether the client belongs to the hosts
+ * for which initial logon should be delayed...
+ */
+static bool delay_logon(const char *peer_name, const char *peer_addr)
+{
+ const char **delay_list = lp_init_logon_delayed_hosts();
+ const char *peer[2];
+
+ if (delay_list == NULL) {
+ return False;
+ }
+
+ peer[0] = peer_name;
+ peer[1] = peer_addr;
+
+ return list_match(delay_list, (const char *)peer, client_match);
+}
+
+static void delayed_init_logon_handler(struct event_context *event_ctx,
+ struct timed_event *te,
+ const struct timeval *now,
+ void *private_data)
+{
+ struct packet_struct *p = (struct packet_struct *)private_data;
+
+ DEBUG(10, ("delayed_init_logon_handler (%lx): re-queuing packet.\n",
+ (unsigned long)te));
+
+ queue_packet(p);
+
+ TALLOC_FREE(te);
+}
+
+/****************************************************************************
+Process a domain logon packet
+**************************************************************************/
+
+void process_logon_packet(struct packet_struct *p, char *buf,int len,
+ const char *mailslot)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ fstring my_name;
+ fstring reply_name;
+ char outbuf[1024];
+ int code;
+ uint16 token = 0;
+ uint32 ntversion = 0;
+ uint16 lmnttoken = 0;
+ uint16 lm20token = 0;
+ uint32 domainsidsize;
+ bool short_request = False;
+ char *getdc;
+ char *uniuser; /* Unicode user name. */
+ fstring ascuser;
+ char *unicomp; /* Unicode computer name. */
+ size_t size;
+ struct sockaddr_storage ss;
+ const struct sockaddr_storage *pss;
+ struct in_addr ip;
+
+ in_addr_to_sockaddr_storage(&ss, p->ip);
+ pss = iface_ip(&ss);
+ if (!pss) {
+ DEBUG(5,("process_logon_packet:can't find outgoing interface "
+ "for packet from IP %s\n",
+ inet_ntoa(p->ip) ));
+ return;
+ }
+ ip = ((struct sockaddr_in *)pss)->sin_addr;
+
+ memset(outbuf, 0, sizeof(outbuf));
+
+ if (!lp_domain_logons()) {
+ DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
+logons are not enabled.\n", inet_ntoa(p->ip) ));
+ return;
+ }
+
+ fstrcpy(my_name, global_myname());
+
+ code = get_safe_SVAL(buf,len,buf,0,-1);
+ DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
+
+ switch (code) {
+ case 0:
+ {
+ fstring mach_str, user_str, getdc_str;
+ char *q = buf + 2;
+ char *machine = q;
+ char *user = skip_string(buf,len,machine);
+
+ if (!user || PTR_DIFF(user, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+ getdc = skip_string(buf,len,user);
+
+ if (!getdc || PTR_DIFF(getdc, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+ q = skip_string(buf,len,getdc);
+
+ if (!q || PTR_DIFF(q + 5, buf) > len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+ token = SVAL(q,3);
+
+ fstrcpy(reply_name,my_name);
+
+ pull_ascii_fstring(mach_str, machine);
+ pull_ascii_fstring(user_str, user);
+ pull_ascii_fstring(getdc_str, getdc);
+
+ DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
+ mach_str,inet_ntoa(p->ip),user_str,token));
+
+ q = outbuf;
+ SSVAL(q, 0, 6);
+ q += 2;
+
+ fstrcpy(reply_name, "\\\\");
+ fstrcat(reply_name, my_name);
+ size = push_ascii(q,reply_name,
+ sizeof(outbuf)-PTR_DIFF(q, outbuf),
+ STR_TERMINATE);
+ if (size == (size_t)-1) {
+ return;
+ }
+ q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
+
+ SSVAL(q, 0, token);
+ q += 2;
+
+ dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
+
+ send_mailslot(True, getdc_str,
+ outbuf,PTR_DIFF(q,outbuf),
+ global_myname(), 0x0,
+ mach_str,
+ dgram->source_name.name_type,
+ p->ip, ip, p->port);
+ break;
+ }
+
+ case QUERYFORPDC:
+ {
+ fstring mach_str, getdc_str;
+ fstring source_name;
+ char *q = buf + 2;
+ char *machine = q;
+
+ if (!lp_domain_master()) {
+ /* We're not Primary Domain Controller -- ignore this */
+ return;
+ }
+
+ getdc = skip_string(buf,len,machine);
+
+ if (!getdc || PTR_DIFF(getdc, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+ q = skip_string(buf,len,getdc);
+
+ if (!q || PTR_DIFF(q, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+ q = ALIGN2(q, buf);
+
+ /* At this point we can work out if this is a W9X or NT style
+ request. Experiments show that the difference is wether the
+ packet ends here. For a W9X request we now end with a pair of
+ bytes (usually 0xFE 0xFF) whereas with NT we have two further
+ strings - the following is a simple way of detecting this */
+
+ if (len - PTR_DIFF(q, buf) <= 3) {
+ short_request = True;
+ } else {
+ unicomp = q;
+
+ if (PTR_DIFF(q, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ /* A full length (NT style) request */
+ q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
+
+ if (PTR_DIFF(q, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ if (len - PTR_DIFF(q, buf) > 8) {
+ /* with NT5 clients we can sometimes
+ get additional data - a length specificed string
+ containing the domain name, then 16 bytes of
+ data (no idea what it is) */
+ int dom_len = CVAL(q, 0);
+ q++;
+ if (dom_len != 0) {
+ q += dom_len + 1;
+ }
+ q += 16;
+ }
+
+ if (PTR_DIFF(q + 8, buf) > len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ ntversion = IVAL(q, 0);
+ lmnttoken = SVAL(q, 4);
+ lm20token = SVAL(q, 6);
+ }
+
+ /* Construct reply. */
+ q = outbuf;
+ SSVAL(q, 0, QUERYFORPDC_R);
+ q += 2;
+
+ fstrcpy(reply_name,my_name);
+ size = push_ascii(q, reply_name,
+ sizeof(outbuf)-PTR_DIFF(q, outbuf),
+ STR_TERMINATE);
+ if (size == (size_t)-1) {
+ return;
+ }
+ q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
+
+ /* PDC and domain name */
+ if (!short_request) {
+ /* Make a full reply */
+ q = ALIGN2(q, outbuf);
+
+ q += dos_PutUniCode(q, my_name,
+ sizeof(outbuf) - PTR_DIFF(q, outbuf),
+ True); /* PDC name */
+ q += dos_PutUniCode(q, lp_workgroup(),
+ sizeof(outbuf) - PTR_DIFF(q, outbuf),
+ True); /* Domain name*/
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
+ return;
+ }
+ SIVAL(q, 0, 1); /* our nt version */
+ SSVAL(q, 4, 0xffff); /* our lmnttoken */
+ SSVAL(q, 6, 0xffff); /* our lm20token */
+ q += 8;
+ }
+
+ /* RJS, 21-Feb-2000, we send a short reply if the request was short */
+
+ pull_ascii_fstring(mach_str, machine);
+
+ DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
+reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
+ mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
+ QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
+ (uint32)lm20token ));
+
+ 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_str,
+ outbuf,PTR_DIFF(q,outbuf),
+ global_myname(), 0x0,
+ source_name,
+ dgram->source_name.name_type,
+ p->ip, ip, p->port);
+ return;
+ }
+
+ case SAMLOGON:
+
+ {
+ fstring getdc_str;
+ fstring source_name;
+ char *source_addr;
+ char *q = buf + 2;
+ fstring asccomp;
+
+ q += 2;
+
+ if (PTR_DIFF(q, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ unicomp = q;
+ uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
+
+ if (PTR_DIFF(uniuser, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
+
+ if (PTR_DIFF(getdc, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ q = skip_string(buf,len,getdc);
+
+ if (!q || PTR_DIFF(q + 8, buf) >= len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ q += 4; /* Account Control Bits - indicating username type */
+ domainsidsize = IVAL(q, 0);
+ q += 4;
+
+ DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
+
+ if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
+ q += domainsidsize;
+ q = ALIGN4(q, buf);
+ }
+
+ DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
+
+ if (len - PTR_DIFF(q, buf) > 8) {
+ /* with NT5 clients we can sometimes
+ get additional data - a length specificed string
+ containing the domain name, then 16 bytes of
+ data (no idea what it is) */
+ int dom_len = CVAL(q, 0);
+ q++;
+ if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
+ q += dom_len + 1;
+ }
+ q += 16;
+ }
+
+ if (PTR_DIFF(q + 8, buf) > len) {
+ DEBUG(0,("process_logon_packet: bad packet\n"));
+ return;
+ }
+
+ ntversion = IVAL(q, 0);
+ lmnttoken = SVAL(q, 4);
+ lm20token = SVAL(q, 6);
+ q += 8;
+
+ DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
+
+ /*
+ * we respond regadless of whether the machine is in our password
+ * database. If it isn't then we let smbd send an appropriate error.
+ * Let's ignore the SID.
+ */
+ pull_ucs2_fstring(ascuser, uniuser);
+ pull_ucs2_fstring(asccomp, unicomp);
+ DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
+
+ fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
+ fstrcat(reply_name, my_name);
+
+ DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
+ asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
+ SAMLOGON_R ,lmnttoken));
+
+ /* Construct reply. */
+
+ q = outbuf;
+ /* we want the simple version unless we are an ADS PDC..which means */
+ /* never, at least for now */
+ if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
+ if (SVAL(uniuser, 0) == 0) {
+ SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
+ } else {
+ SSVAL(q, 0, SAMLOGON_R);
+ }
+
+ q += 2;
+
+ q += dos_PutUniCode(q, reply_name,
+ sizeof(outbuf) - PTR_DIFF(q, outbuf),
+ True);
+ q += dos_PutUniCode(q, ascuser,
+ sizeof(outbuf) - PTR_DIFF(q, outbuf),
+ True);
+ q += dos_PutUniCode(q, lp_workgroup(),
+ sizeof(outbuf) - PTR_DIFF(q, outbuf),
+ True);
+ }
+#ifdef HAVE_ADS
+ else {
+ struct GUID domain_guid;
+ UUID_FLAT flat_guid;
+ char *domain;
+ char *hostname;
+ char *component, *dc, *q1;
+ char *q_orig = q;
+ int str_offset;
+ char *saveptr = NULL;
+
+ domain = get_mydnsdomname(talloc_tos());
+ if (!domain) {
+ DEBUG(2,
+ ("get_mydnsdomname failed.\n"));
+ return;
+ }
+ hostname = get_myname(talloc_tos());
+ if (!hostname) {
+ DEBUG(2,
+ ("get_myname failed.\n"));
+ return;
+ }
+
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
+ return;
+ }
+ if (SVAL(uniuser, 0) == 0) {
+ SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
+ } else {
+ SIVAL(q, 0, SAMLOGON_AD_R);
+ }
+ q += 4;
+
+ SIVAL(q, 0, NBT_SERVER_PDC|NBT_SERVER_GC|NBT_SERVER_LDAP|NBT_SERVER_DS|
+ NBT_SERVER_KDC|NBT_SERVER_TIMESERV|NBT_SERVER_CLOSEST|NBT_SERVER_WRITABLE);
+ q += 4;
+
+ /* Push Domain GUID */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
+ return;
+ }
+ if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
+ DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
+ return;
+ }
+
+ smb_uuid_pack(domain_guid, &flat_guid);
+ memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
+ q += UUID_FLAT_SIZE;
+
+ /* Forest */
+ str_offset = q - q_orig;
+ dc = domain;
+ q1 = q;
+ while ((component = strtok_r(dc, ".", &saveptr)) != NULL) {
+ dc = NULL;
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
+ return;
+ }
+ size = push_ascii(&q[1], component,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
+ if (size == (size_t)-1 || size > 0xff) {
+ return;
+ }
+ SCVAL(q, 0, size);
+ q += (size + 1);
+ }
+
+ /* Unk0 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
+ return;
+ }
+ SCVAL(q, 0, 0);
+ q++;
+
+ /* Domain */
+ SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
+ SCVAL(q, 1, str_offset & 0xFF);
+ q += 2;
+
+ /* Hostname */
+ size = push_ascii(&q[1], hostname,
+ 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) < 3) {
+ return;
+ }
+
+ SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
+ SCVAL(q, 1, str_offset & 0xFF);
+ q += 2;
+
+ /* NETBIOS of domain */
+ size = push_ascii(&q[1], lp_workgroup(),
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ STR_UPPER);
+ if (size == (size_t)-1 || size > 0xff) {
+ return;
+ }
+ SCVAL(q, 0, size);
+ q += (size + 1);
+
+ /* Unk1 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
+ return;
+ }
+
+ SCVAL(q, 0, 0);
+ q++;
+
+ /* NETBIOS of hostname */
+ size = push_ascii(&q[1], my_name,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
+ if (size == (size_t)-1 || size > 0xff) {
+ return;
+ }
+ SCVAL(q, 0, size);
+ q += (size + 1);
+
+ /* Unk2 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
+ return;
+ }
+
+ 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, ntohl(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);
+ source_addr = SMB_STRDUP(inet_ntoa(dgram->header.source_ip));
+ if (source_addr == NULL) {
+ DEBUG(3, ("out of memory copying client"
+ " address string\n"));
+ return;
+ }
+
+ /*
+ * handle delay.
+ * packets requeued after delay are marked as
+ * locked.
+ */
+ if ((p->locked == False) &&
+ (strlen(ascuser) == 0) &&
+ delay_logon(source_name, source_addr))
+ {
+ struct timeval when;
+
+ DEBUG(3, ("process_logon_packet: "
+ "delaying initial logon "
+ "reply for client %s(%s) for "
+ "%u milliseconds\n",
+ source_name, source_addr,
+ lp_init_logon_delay()));
+
+ when = timeval_current_ofs(0,
+ lp_init_logon_delay() * 1000);
+ p->locked = true;
+ event_add_timed(nmbd_event_context(),
+ NULL,
+ when,
+ "delayed_init_logon",
+ delayed_init_logon_handler,
+ p);
+ } else {
+ DEBUG(3, ("process_logon_packet: "
+ "processing delayed initial "
+ "logon reply for client "
+ "%s(%s)\n",
+ source_name, source_addr));
+
+ p->locked = false;
+ send_mailslot(true, getdc,
+ outbuf,PTR_DIFF(q,outbuf),
+ global_myname(), 0x0,
+ source_name,
+ dgram->source_name.name_type,
+ p->ip, ip, p->port);
+ }
+
+ SAFE_FREE(source_addr);
+
+ 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;
+ }
+}
generated by cgit (git 2.34.1) at 2025-02-09 01:46:23 +0000