first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 480 insertions, 0 deletions

diff --git a/source4/nmbd/nmbd_processlogon.c b/source4/nmbd/nmbd_processlogon.c
new file mode 100644
index 0000000000..1fcfd11a3e
--- /dev/null
+++ b/source4/nmbd/nmbd_processlogon.c
@@ -0,0 +1,480 @@
+/* 
+   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 1994-1998
+   Copyright (C) Jim McDonough 2002
+   Copyright (C) Anthony Liguori 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 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.
+   
+   Revision History:
+
+*/
+
+#include "includes.h"
+
+struct sam_database_info {
+        uint32 index;
+        uint32 serial_lo, serial_hi;
+        uint32 date_lo, date_hi;
+};
+
+/****************************************************************************
+Send a message to smbd to do a sam delta sync
+**************************************************************************/
+static void send_repl_message(uint32 low_serial)
+{
+        TDB_CONTEXT *tdb;
+
+        tdb = tdb_open_log(lock_path("connections.tdb"), 0,
+                           TDB_DEFAULT, O_RDONLY, 0);
+
+        if (!tdb) {
+                DEBUG(3, ("send_repl_message(): failed to open connections "
+                          "database\n"));
+                return;
+        }
+
+        DEBUG(3, ("sending replication message, serial = 0x%04x\n", 
+                  low_serial));
+        
+        message_send_all(tdb, MSG_SMB_SAM_REPL, &low_serial,
+                         sizeof(low_serial), False, NULL);
+
+        tdb_close(tdb);
+}
+
+/****************************************************************************
+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;
+  pstring my_name;
+  fstring reply_name;
+  pstring outbuf;
+  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. */
+  pstring ascuser;
+  char *unicomp; /* Unicode computer name. */
+
+  memset(outbuf, 0, sizeof(outbuf));
+
+  if (!lp_domain_logons())
+  {
+    DEBUG(3,("process_logon_packet: Logon packet received from IP %s and domain \
+logons are not enabled.\n", inet_ntoa(p->ip) ));
+    return;
+  }
+
+  pstrcpy(my_name, lp_netbios_name());
+
+  code = SVAL(buf,0);
+  DEBUG(1,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
+
+  switch (code)
+  {
+    case 0:    
+    {
+      char *q = buf + 2;
+      char *machine = q;
+      char *user = skip_string(machine,1);
+
+      getdc = skip_string(user,1);
+      q = skip_string(getdc,1);
+      token = SVAL(q,3);
+
+      fstrcpy(reply_name,my_name); 
+
+      DEBUG(3,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
+             machine,inet_ntoa(p->ip),user,token));
+
+      q = outbuf;
+      SSVAL(q, 0, 6);
+      q += 2;
+
+      fstrcpy(reply_name, "\\\\");
+      fstrcat(reply_name, my_name);
+      fstrcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
+
+      SSVAL(q, 0, token);
+      q += 2;
+
+      dump_data(4, outbuf, PTR_DIFF(q, outbuf));
+
+      send_mailslot(True, getdc, 
+                    outbuf,PTR_DIFF(q,outbuf),
+		    lp_netbios_name(), 0x0,
+					machine,
+                    dgram->source_name.name_type,
+                    p->ip, *iface_ip(p->ip), p->port);  
+      break;
+    }
+
+    case QUERYFORPDC:
+    {
+      char *q = buf + 2;
+      char *machine = q;
+
+      if (!lp_domain_master())
+      {  
+         /* We're not Primary Domain Controller -- ignore this */
+         return;
+      }
+
+      getdc = skip_string(machine,1);
+      q = skip_string(getdc,1);
+      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;
+
+	      /* A full length (NT style) request */
+	      q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
+
+	      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;
+	      }
+	      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);
+      fstrcpy(q, reply_name);
+      q = skip_string(q, 1); /* PDC name */
+
+      /* PDC and domain name */
+      if (!short_request)  /* Make a full reply */
+      {
+        q = ALIGN2(q, outbuf);
+
+        q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
+        q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
+        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 */
+
+      DEBUG(3,("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",
+            machine,inet_ntoa(p->ip), reply_name, lp_workgroup(),
+            QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
+            (uint32)lm20token ));
+
+      dump_data(4, outbuf, PTR_DIFF(q, outbuf));
+
+      send_mailslot(True, getdc,
+                  outbuf,PTR_DIFF(q,outbuf),
+		    lp_netbios_name(), 0x0,
+                  dgram->source_name.name,
+                  dgram->source_name.name_type,
+                  p->ip, *iface_ip(p->ip), p->port);  
+      return;
+    }
+
+    case SAMLOGON:
+    {
+      char *q = buf + 2;
+      fstring asccomp;
+
+      q += 2;
+      unicomp = q;
+      uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
+      getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
+      q = skip_string(getdc,1);
+      q += 4; /* Account Control Bits - indicating username type */
+      domainsidsize = IVAL(q, 0);
+      q += 4;
+
+      DEBUG(3,("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(3,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %d\n", len, 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;
+      }
+
+      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_pstring(ascuser, uniuser);
+      pull_ucs2_fstring(asccomp, unicomp);
+      DEBUG(3,("process_logon_packet: SAMLOGON user %s\n", ascuser));
+
+      fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
+      fstrcat(reply_name, my_name);
+
+      DEBUG(3,("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(pstring), True);
+	q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
+	q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
+      } 
+#ifdef HAVE_ADS
+      else {
+	GUID domain_guid;
+	pstring domain;
+	char *hostname = NULL;
+	char *component, *dc, *q1;
+	uint8 size;
+
+	get_mydomname(domain);
+	hostname = get_myname();
+	
+	if (SVAL(uniuser, 0) == 0) {
+	  SSVAL(q, 0, SAMLOGON_AD_UNK_R);	/* user unknown */
+	} else {
+	  SSVAL(q, 0, SAMLOGON_AD_R);
+	}
+	q += 2;
+
+	SSVAL(q, 0, 0);
+	q += 2;
+	SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
+	            ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
+	q += 4;
+
+	/* Push Domain GUID */
+	if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
+	  DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
+	  return;
+	}
+	memcpy(q, &domain_guid, sizeof(domain_guid));
+	q += sizeof(domain_guid);
+
+	/* Push domain components */
+	dc = domain;
+	q1 = q;
+	while ((component = strtok(dc, "."))) {
+	  dc = NULL;
+	  size = push_ascii(&q[1], component, -1, 0);
+	  SCVAL(q, 0, size);
+	  q += (size + 1);
+	}
+	SCVAL(q, 0, 0); q++;
+	SSVAL(q, 0, 0x18c0); /* not sure what this is for, but  */
+	q += 2;              /* it must follow the domain name. */
+
+	/* Push dns host name */
+	size = push_ascii(&q[1], hostname, -1, 0);
+	SCVAL(q, 0, size);
+	q += (size + 1);
+	SSVAL(q, 0, 0x18c0); /* not sure what this is for, but  */
+	q += 2;              /* it must follow the domain name. */
+
+	/* Push NETBIOS of domain */
+	size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
+	SCVAL(q, 0, size);
+	q += (size + 1);
+	SCVAL(q, 0, 0); q++; /* is this a null terminator or empty field */
+	/* null terminator would not be needed because size is included */
+
+	/* Push NETBIOS of hostname */
+	size = push_ascii(&q[1], my_name, -1, 0);
+	SCVAL(q, 0, size);
+	q += (size + 1);
+	SCVAL(q, 0, 0); q++; /* null terminator or empty field? */
+
+	/* Push user account */
+	size = push_ascii(&q[1], ascuser, -1, 0);
+	SCVAL(q, 0, size);
+	q += (size + 1);
+
+	/* Push 'Default-First-Site-Name' */
+	size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
+	SCVAL(q, 0, size);
+	q += (size + 1);
+
+	SSVAL(q, 0, 0xc000); /* unknown */
+	SCVAL(q, 2, PTR_DIFF(q,q1));
+	SCVAL(q, 3, 0x10); /* unknown */
+	q += 4;
+
+	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 */
+	if (hostname) free(hostname);
+      }	
+#endif
+
+      /* 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, outbuf, PTR_DIFF(q, outbuf));
+
+      send_mailslot(True, getdc,
+                   outbuf,PTR_DIFF(q,outbuf),
+		    lp_netbios_name(), 0x0,
+                   dgram->source_name.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: {
+          struct sam_database_info *db_info;
+          char *q = buf + 2;
+          int i, db_count;
+          uint32 low_serial;
+          
+          /* Header */
+          
+          low_serial = IVAL(q, 0); q += 4;     /* Low serial number */
+
+          q += 4;                   /* Date/time */
+          q += 4;                   /* Pulse */
+          q += 4;                   /* Random */
+          
+          /* Domain info */
+          
+          q = skip_string(q, 1);    /* PDC name */
+          q = skip_string(q, 1);    /* Domain name */
+          q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode PDC name */
+          q = skip_unibuf(q, PTR_DIFF(buf + len, q)); /* Unicode domain name */
+          
+          /* Database info */
+          
+          db_count = SVAL(q, 0); q += 2;
+          
+          db_info = (struct sam_database_info *)
+                  malloc(sizeof(struct sam_database_info) * db_count);
+
+          if (db_info == NULL) {
+                  DEBUG(3, ("out of memory allocating info for %d databases\n",
+                            db_count));
+                  return;
+          }
+          
+          for (i = 0; i < db_count; i++) {
+                  db_info[i].index = IVAL(q, 0);
+                  db_info[i].serial_lo = IVAL(q, 4);
+                  db_info[i].serial_hi = IVAL(q, 8);
+                  db_info[i].date_lo = IVAL(q, 12);
+                  db_info[i].date_hi = IVAL(q, 16);
+                  q += 20;
+          }
+
+          /* Domain SID */
+
+          q += IVAL(q, 0) + 4;  /* 4 byte length plus data */
+          
+          q += 2;               /* Alignment? */
+
+          /* Misc other info */
+
+          q += 4;               /* NT version (0x1) */
+          q += 2;               /* LMNT token (0xff) */
+          q += 2;               /* LM20 token (0xff) */
+
+          SAFE_FREE(db_info);        /* Not sure whether we need to do anything
+                                   useful with these */
+
+          /* Send message to smbd */
+
+          send_repl_message(low_serial);
+
+          break;
+  }
+
+    default:
+    {
+      DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
+      return;
+    }
+  }
+}