diff options
Diffstat (limited to 'source3/nmbd/nmbd_processlogon.c')
| -rw-r--r-- | source3/nmbd/nmbd_processlogon.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/source3/nmbd/nmbd_processlogon.c b/source3/nmbd/nmbd_processlogon.c new file mode 100644 index 0000000000..23e4f935ca --- /dev/null +++ b/source3/nmbd/nmbd_processlogon.c @@ -0,0 +1,389 @@ +/* + 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 + + 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" + +extern pstring global_myname; +extern fstring global_myworkgroup; + +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, + 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, global_myname); + strupper(my_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), + global_myname, 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, global_myworkgroup,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, global_myworkgroup, + 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), + global_myname, 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. */ + fstrcpy(reply_name+2,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, global_myworkgroup, + SAMLOGON_R ,lmnttoken)); + + /* Construct reply. */ + + q = outbuf; + 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, global_myworkgroup,sizeof(pstring), True); + + /* tell the client what version we are */ + SIVAL(q, 0, 1); /* 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), + global_myname, 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; + } + } +} |