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-rw-r--r--source3/nmbd/nmbd_processlogon.c570
1 files changed, 570 insertions, 0 deletions
diff --git a/source3/nmbd/nmbd_processlogon.c b/source3/nmbd/nmbd_processlogon.c
new file mode 100644
index 0000000..3e86289
--- /dev/null
+++ b/source3/nmbd/nmbd_processlogon.c
@@ -0,0 +1,570 @@
+/*
+ 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"
+#include "../libcli/netlogon/netlogon.h"
+#include "../libcli/cldap/cldap.h"
+#include "../lib/tsocket/tsocket.h"
+#include "../libcli/security/security.h"
+#include "secrets.h"
+#include "nmbd/nmbd.h"
+
+struct sam_database_info {
+ uint32_t index;
+ uint32_t serial_lo, serial_hi;
+ uint32_t 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 tevent_context *event_ctx,
+ struct tevent_timer *te,
+ 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);
+}
+
+struct nmbd_proxy_logon_context {
+ struct cldap_socket *cldap_sock;
+};
+
+static struct nmbd_proxy_logon_context *global_nmbd_proxy_logon;
+
+bool initialize_nmbd_proxy_logon(void)
+{
+ const char *cldap_server = lp_parm_const_string(-1, "nmbd_proxy_logon",
+ "cldap_server", NULL);
+ struct nmbd_proxy_logon_context *ctx;
+ NTSTATUS status;
+ struct in_addr addr;
+ char addrstr[INET_ADDRSTRLEN];
+ const char *server_str;
+ int ret;
+ struct tsocket_address *server_addr;
+
+ if (!cldap_server) {
+ return true;
+ }
+
+ addr = interpret_addr2(cldap_server);
+ server_str = inet_ntop(AF_INET, &addr,
+ addrstr, sizeof(addrstr));
+ if (!server_str || strcmp("0.0.0.0", server_str) == 0) {
+ DEBUG(0,("Failed to resolve[%s] for nmbd_proxy_logon\n",
+ cldap_server));
+ return false;
+ }
+
+ ctx = talloc_zero(nmbd_event_context(),
+ struct nmbd_proxy_logon_context);
+ if (!ctx) {
+ return false;
+ }
+
+ ret = tsocket_address_inet_from_strings(ctx, "ipv4",
+ server_str, LDAP_PORT,
+ &server_addr);
+ if (ret != 0) {
+ TALLOC_FREE(ctx);
+ status = map_nt_error_from_unix(errno);
+ DEBUG(0,("Failed to create cldap tsocket_address for %s - %s\n",
+ server_str, nt_errstr(status)));
+ return false;
+ }
+
+ /* we create a connected udp socket */
+ status = cldap_socket_init(ctx, NULL, server_addr, &ctx->cldap_sock);
+ TALLOC_FREE(server_addr);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(ctx);
+ DEBUG(0,("failed to create cldap socket for %s: %s\n",
+ server_str, nt_errstr(status)));
+ return false;
+ }
+
+ global_nmbd_proxy_logon = ctx;
+ return true;
+}
+
+struct nmbd_proxy_logon_state {
+ struct in_addr local_ip;
+ struct packet_struct *p;
+ const char *remote_name;
+ uint8_t remote_name_type;
+ const char *remote_mailslot;
+ struct nbt_netlogon_packet req;
+ struct nbt_netlogon_response resp;
+ struct cldap_netlogon io;
+};
+
+static int nmbd_proxy_logon_state_destructor(struct nmbd_proxy_logon_state *s)
+{
+ s->p->locked = false;
+ free_packet(s->p);
+ return 0;
+}
+
+static void nmbd_proxy_logon_done(struct tevent_req *subreq);
+
+static void nmbd_proxy_logon(struct nmbd_proxy_logon_context *ctx,
+ struct in_addr local_ip,
+ struct packet_struct *p,
+ const uint8_t *buf,
+ uint32_t len)
+{
+ struct nmbd_proxy_logon_state *state;
+ enum ndr_err_code ndr_err;
+ DATA_BLOB blob = data_blob_const(buf, len);
+ const char *computer_name = NULL;
+ const char *mailslot_name = NULL;
+ const char *user_name = NULL;
+ const char *domain_sid = NULL;
+ uint32_t acct_control = 0;
+ uint32_t nt_version = 0;
+ struct tevent_req *subreq;
+ fstring source_name;
+ struct dgram_packet *dgram = &p->packet.dgram;
+
+ state = talloc_zero(ctx, struct nmbd_proxy_logon_state);
+ if (!state) {
+ DEBUG(0,("failed to allocate nmbd_proxy_logon_state\n"));
+ return;
+ }
+
+ pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
+ state->remote_name = talloc_strdup(state, source_name);
+ state->remote_name_type = dgram->source_name.name_type,
+ state->local_ip = local_ip;
+ state->p = p;
+
+ ndr_err = ndr_pull_struct_blob(
+ &blob, state, &state->req,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
+ DEBUG(0,("failed parse nbt_netlogon_packet: %s\n",
+ nt_errstr(status)));
+ TALLOC_FREE(state);
+ return;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("nmbd_proxy_logon:\n"));
+ NDR_PRINT_DEBUG(nbt_netlogon_packet, &state->req);
+ }
+
+ switch (state->req.command) {
+ case LOGON_SAM_LOGON_REQUEST:
+ computer_name = state->req.req.logon.computer_name;
+ user_name = state->req.req.logon.user_name;
+ mailslot_name = state->req.req.logon.mailslot_name;
+ acct_control = state->req.req.logon.acct_control;
+ if (state->req.req.logon.sid_size > 0) {
+ domain_sid = dom_sid_string(state,
+ &state->req.req.logon.sid);
+ if (!domain_sid) {
+ DEBUG(0,("failed to get a string for sid\n"));
+ TALLOC_FREE(state);
+ return;
+ }
+ }
+ nt_version = state->req.req.logon.nt_version;
+ break;
+
+ default:
+ /* this can't happen as the caller already checks the command */
+ break;
+ }
+
+ state->remote_mailslot = mailslot_name;
+
+ if (user_name && strlen(user_name) == 0) {
+ user_name = NULL;
+ }
+
+ if (computer_name && strlen(computer_name) == 0) {
+ computer_name = NULL;
+ }
+
+ /*
+ * as the socket is connected,
+ * we don't need to specify the destination
+ */
+ state->io.in.dest_address = NULL;
+ state->io.in.dest_port = 0;
+ state->io.in.realm = NULL;
+ state->io.in.host = computer_name;
+ state->io.in.user = user_name;
+ state->io.in.domain_guid = NULL;
+ state->io.in.domain_sid = domain_sid;
+ state->io.in.acct_control = acct_control;
+ state->io.in.version = nt_version;
+ state->io.in.map_response = false;
+
+ subreq = cldap_netlogon_send(state, nmbd_event_context(),
+ ctx->cldap_sock,
+ &state->io);
+ if (!subreq) {
+ DEBUG(0,("failed to send cldap netlogon call\n"));
+ TALLOC_FREE(state);
+ return;
+ }
+ tevent_req_set_callback(subreq, nmbd_proxy_logon_done, state);
+
+ /* we reply async */
+ state->p->locked = true;
+ talloc_set_destructor(state, nmbd_proxy_logon_state_destructor);
+}
+
+static void nmbd_proxy_logon_done(struct tevent_req *subreq)
+{
+ struct nmbd_proxy_logon_state *state =
+ tevent_req_callback_data(subreq,
+ struct nmbd_proxy_logon_state);
+ NTSTATUS status;
+ DATA_BLOB response = data_blob_null;
+
+ status = cldap_netlogon_recv(subreq, state, &state->io);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("failed to recv cldap netlogon call: %s\n",
+ nt_errstr(status)));
+ TALLOC_FREE(state);
+ return;
+ }
+
+ status = push_netlogon_samlogon_response(&response, state,
+ &state->io.out.netlogon);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("failed to push netlogon_samlogon_response: %s\n",
+ nt_errstr(status)));
+ TALLOC_FREE(state);
+ return;
+ }
+
+ send_mailslot(true, state->remote_mailslot,
+ (char *)response.data, response.length,
+ lp_netbios_name(), 0x0,
+ state->remote_name,
+ state->remote_name_type,
+ state->p->ip,
+ state->local_ip,
+ state->p->port);
+ TALLOC_FREE(state);
+}
+
+/****************************************************************************
+Process a domain logon packet
+**************************************************************************/
+
+void process_logon_packet(struct packet_struct *p, const char *buf,int len,
+ const char *mailslot)
+{
+ fstring source_name;
+ struct dgram_packet *dgram = &p->packet.dgram;
+ struct sockaddr_storage ss;
+ const struct sockaddr_storage *pss;
+ struct in_addr ip;
+
+ DATA_BLOB blob_in, blob_out;
+ enum ndr_err_code ndr_err;
+ struct nbt_netlogon_packet request;
+ struct nbt_netlogon_response response;
+ NTSTATUS status;
+ const char *pdc_name;
+
+ in_addr_to_sockaddr_storage(&ss, p->ip);
+ pss = iface_ip((struct sockaddr *)&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 = ((const struct sockaddr_in *)pss)->sin_addr;
+
+ if (!IS_DC) {
+ DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
+logons are not enabled.\n", inet_ntoa(p->ip) ));
+ return;
+ }
+
+ pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
+
+ pdc_name = talloc_asprintf(talloc_tos(), "\\\\%s", lp_netbios_name());
+ if (!pdc_name) {
+ return;
+ }
+
+ ZERO_STRUCT(request);
+
+ blob_in = data_blob_const(buf, len);
+
+ ndr_err = ndr_pull_struct_blob(&blob_in, talloc_tos(), &request,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(1,("process_logon_packet: Failed to pull logon packet\n"));
+ return;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(nbt_netlogon_packet, &request);
+ }
+
+ DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n",
+ inet_ntoa(p->ip), request.command));
+
+ switch (request.command) {
+ case LOGON_REQUEST: {
+
+ struct nbt_netlogon_response2 response2;
+
+ DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
+ request.req.logon0.computer_name, inet_ntoa(p->ip),
+ request.req.logon0.user_name,
+ request.req.logon0.lm20_token));
+
+ response2.command = LOGON_RESPONSE2;
+ response2.pdc_name = pdc_name;
+ response2.lm20_token = 0xffff;
+
+ response.response_type = NETLOGON_RESPONSE2;
+ response.data.response2 = response2;
+
+ status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("process_logon_packet: failed to push packet\n"));
+ return;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(nbt_netlogon_response2, &response.data.response2);
+ }
+
+ send_mailslot(True, request.req.logon0.mailslot_name,
+ (char *)blob_out.data,
+ blob_out.length,
+ lp_netbios_name(), 0x0,
+ source_name,
+ dgram->source_name.name_type,
+ p->ip, ip, p->port);
+ break;
+ }
+
+ case LOGON_PRIMARY_QUERY: {
+
+ struct nbt_netlogon_response_from_pdc get_pdc;
+
+ if (!lp_domain_master()) {
+ /* We're not Primary Domain Controller -- ignore this */
+ return;
+ }
+
+ 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",
+ request.req.pdc.computer_name,
+ inet_ntoa(p->ip),
+ lp_netbios_name(),
+ lp_workgroup(),
+ NETLOGON_RESPONSE_FROM_PDC,
+ request.req.pdc.nt_version,
+ request.req.pdc.lmnt_token,
+ request.req.pdc.lm20_token));
+
+ get_pdc.command = NETLOGON_RESPONSE_FROM_PDC;
+ get_pdc.pdc_name = lp_netbios_name();
+ get_pdc._pad = data_blob_null;
+ get_pdc.unicode_pdc_name = lp_netbios_name();
+ get_pdc.domain_name = lp_workgroup();
+ get_pdc.nt_version = NETLOGON_NT_VERSION_1;
+ get_pdc.lmnt_token = 0xffff;
+ get_pdc.lm20_token = 0xffff;
+
+ response.response_type = NETLOGON_GET_PDC;
+ response.data.get_pdc = get_pdc;
+
+ status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("process_logon_packet: failed to push packet\n"));
+ return;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(nbt_netlogon_response_from_pdc, &response.data.get_pdc);
+ }
+
+ send_mailslot(True, request.req.pdc.mailslot_name,
+ (char *)blob_out.data,
+ blob_out.length,
+ lp_netbios_name(), 0x0,
+ source_name,
+ dgram->source_name.name_type,
+ p->ip, ip, p->port);
+
+ return;
+ }
+
+ case LOGON_SAM_LOGON_REQUEST: {
+ char *source_addr;
+ bool user_unknown = false;
+
+ struct netlogon_samlogon_response samlogon;
+ struct NETLOGON_SAM_LOGON_RESPONSE_NT40 nt4;
+
+ if (global_nmbd_proxy_logon) {
+ nmbd_proxy_logon(global_nmbd_proxy_logon,
+ ip, p, (const uint8_t *)buf, len);
+ return;
+ }
+
+ 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;
+ }
+
+ DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
+ request.req.logon.computer_name,
+ inet_ntoa(p->ip),
+ request.req.logon.user_name,
+ pdc_name,
+ lp_workgroup(),
+ LOGON_SAM_LOGON_RESPONSE,
+ request.req.logon.lmnt_token));
+
+ if (!request.req.logon.user_name) {
+ user_unknown = true;
+ }
+
+ nt4.command = user_unknown ? LOGON_SAM_LOGON_USER_UNKNOWN :
+ LOGON_SAM_LOGON_RESPONSE;
+ nt4.pdc_name = pdc_name;
+ nt4.user_name = request.req.logon.user_name;
+ nt4.domain_name = lp_workgroup();
+ nt4.nt_version = NETLOGON_NT_VERSION_1;
+ nt4.lmnt_token = 0xffff;
+ nt4.lm20_token = 0xffff;
+
+ samlogon.ntver = NETLOGON_NT_VERSION_1;
+ samlogon.data.nt4 = nt4;
+
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(NETLOGON_SAM_LOGON_RESPONSE_NT40, &nt4);
+ }
+
+ response.response_type = NETLOGON_SAMLOGON;
+ response.data.samlogon = samlogon;
+
+ status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("process_logon_packet: failed to push packet\n"));
+ SAFE_FREE(source_addr);
+ return;
+ }
+
+ /*
+ * handle delay.
+ * packets requeued after delay are marked as
+ * locked.
+ */
+ if ((p->locked == False) &&
+ (strlen(request.req.logon.user_name) == 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_msec(lp_init_logon_delay());
+ p->locked = true;
+ tevent_add_timer(nmbd_event_context(),
+ NULL,
+ when,
+ 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, request.req.logon.mailslot_name,
+ (char *)blob_out.data,
+ blob_out.length,
+ lp_netbios_name(), 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 NETLOGON_ANNOUNCE_UAS:
+ DEBUG(5, ("Got NETLOGON_ANNOUNCE_UAS\n"));
+ break;
+
+ default:
+ DEBUG(3,("process_logon_packet: Unknown domain request %d\n",
+ request.command));
+ return;
+ }
+}
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