nmbd_processlogon.c [plain text]
#include "includes.h"
struct sam_database_info {
uint32 index;
uint32 serial_lo, serial_hi;
uint32 date_lo, date_hi;
};
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);
}
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;
pstring ascuser;
char *unicomp;
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;
}
pstrcpy(my_name, global_myname());
code = SVAL(buf,0);
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(machine,1);
if (PTR_DIFF(user, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
getdc = skip_string(user,1);
if (PTR_DIFF(getdc, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = skip_string(getdc,1);
if (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);
push_ascii_fstring(q, reply_name);
q = skip_string(q, 1);
SSVAL(q, 0, token);
q += 2;
dump_data(4, 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, *iface_ip(p->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()) {
return;
}
getdc = skip_string(machine,1);
if (PTR_DIFF(getdc, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = skip_string(getdc,1);
if (PTR_DIFF(q, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = ALIGN2(q, buf);
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;
}
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) {
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);
}
q = outbuf;
SSVAL(q, 0, QUERYFORPDC_R);
q += 2;
fstrcpy(reply_name,my_name);
push_ascii_fstring(q, reply_name);
q = skip_string(q, 1);
if (!short_request) {
q = ALIGN2(q, outbuf);
q += dos_PutUniCode(q, my_name, sizeof(pstring), True);
q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
SIVAL(q, 0, 1);
SSVAL(q, 4, 0xffff);
SSVAL(q, 6, 0xffff);
q += 8;
}
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, 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, *iface_ip(p->ip), p->port);
return;
}
case SAMLOGON:
{
fstring getdc_str;
fstring source_name;
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(getdc,1);
if (PTR_DIFF(q + 8, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q += 4;
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) {
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));
pull_ucs2_pstring(ascuser, uniuser);
pull_ucs2_fstring(asccomp, unicomp);
DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
fstrcpy(reply_name, "\\\\");
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));
q = outbuf;
if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
if (SVAL(uniuser, 0) == 0) {
SSVAL(q, 0, SAMLOGON_UNK_R);
} 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 {
struct uuid domain_guid;
UUID_FLAT flat_guid;
pstring domain;
pstring hostname;
char *component, *dc, *q1;
uint8 size;
char *q_orig = q;
int str_offset;
get_mydnsdomname(domain);
get_myname(hostname);
if (SVAL(uniuser, 0) == 0) {
SIVAL(q, 0, SAMLOGON_AD_UNK_R);
} else {
SIVAL(q, 0, SAMLOGON_AD_R);
}
q += 4;
SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
q += 4;
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;
str_offset = q - q_orig;
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++;
SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
SCVAL(q, 1, str_offset & 0xFF);
q += 2;
size = push_ascii(&q[1], hostname, -1, 0);
SCVAL(q, 0, size);
q += (size + 1);
SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
SCVAL(q, 1, str_offset & 0xFF);
q += 2;
size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
SCVAL(q, 0, size);
q += (size + 1);
SCVAL(q, 0, 0);
q++;
size = push_ascii(&q[1], my_name, -1, 0);
SCVAL(q, 0, size);
q += (size + 1);
SCVAL(q, 0, 0);
q++;
if (SVAL(uniuser, 0) != 0) {
size = push_ascii(&q[1], ascuser, -1, 0);
SCVAL(q, 0, size);
q += (size + 1);
}
q_orig = q;
size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
SCVAL(q, 0, size);
q += (size + 1);
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);
SIVAL(q, 0, 0x00000002);
q += 4;
SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
q += 4;
SIVAL(q, 0, 0x00000000);
q += 4;
SIVAL(q, 0, 0x00000000);
q += 4;
}
#endif
SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
SSVAL(q, 4, 0xffff);
SSVAL(q, 6, 0xffff);
q += 8;
dump_data(4, 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;
}
case SAM_UAS_CHANGE:
{
struct sam_database_info *db_info;
char *q = buf + 2;
int i, db_count;
uint32 low_serial;
if (PTR_DIFF(q + 16, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
low_serial = IVAL(q, 0); q += 4;
q += 4;
q += 4;
q += 4;
q = skip_string(q, 1);
if (PTR_DIFF(q, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = skip_string(q, 1);
if (PTR_DIFF(q, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = skip_unibuf(q, PTR_DIFF(buf + len, q));
if (PTR_DIFF(q, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
q = skip_unibuf(q, PTR_DIFF(buf + len, q));
if (PTR_DIFF(q + 2, buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
db_count = SVAL(q, 0); q += 2;
if (PTR_DIFF(q + (db_count*20), buf) >= len) {
DEBUG(0,("process_logon_packet: bad packet\n"));
return;
}
db_info = SMB_MALLOC_ARRAY(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;
}
#if 0
q += IVAL(q, 0) + 4;
q += 2;
q += 4;
q += 2;
q += 2;
#endif
SAFE_FREE(db_info);
send_repl_message(low_serial);
break;
}
default:
DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
return;
}
}