Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 482 insertions, 0 deletions

diff --git a/source3/libsmb/clidgram.c b/source3/libsmb/clidgram.c
new file mode 100644
index 0000000..a45bdac
--- /dev/null
+++ b/source3/libsmb/clidgram.c
@@ -0,0 +1,482 @@
+/*
+   Unix SMB/CIFS implementation.
+   client dgram calls
+   Copyright (C) Andrew Tridgell 1994-1998
+   Copyright (C) Richard Sharpe 2001
+   Copyright (C) John Terpstra 2001
+
+   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/>.
+*/
+
+#include "includes.h"
+#include "libsmb/libsmb.h"
+#include "../lib/util/tevent_ntstatus.h"
+#include "libsmb/clidgram.h"
+#include "libsmb/nmblib.h"
+#include "libsmb/unexpected.h"
+#include "messages.h"
+#include "librpc/gen_ndr/samr.h"
+#include "../lib/util/pidfile.h"
+#include "lib/util/string_wrappers.h"
+
+/*
+ * cli_send_mailslot, send a mailslot for client code ...
+ */
+
+static bool cli_prep_mailslot(bool unique, const char *mailslot,
+		       uint16_t priority,
+		       char *buf, int len,
+		       const char *srcname, int src_type,
+		       const char *dstname, int dest_type,
+		       const struct sockaddr_storage *dest_ss,
+		       int dgm_id,
+		       struct packet_struct *p)
+{
+	struct dgram_packet *dgram = &p->packet.dgram;
+	char *ptr, *p2;
+	char tmp[4];
+	char addr[INET6_ADDRSTRLEN];
+
+	ZERO_STRUCTP(p);
+
+	/*
+	 * Next, build the DGRAM ...
+	 */
+
+	/* DIRECT GROUP or UNIQUE datagram. */
+	dgram->header.msg_type = unique ? 0x10 : 0x11;
+	dgram->header.flags.node_type = M_NODE;
+	dgram->header.flags.first = True;
+	dgram->header.flags.more = False;
+	dgram->header.dgm_id = dgm_id;
+	/* source ip is filled by nmbd */
+	dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
+	dgram->header.packet_offset = 0;
+
+	make_nmb_name(&dgram->source_name,srcname,src_type);
+	make_nmb_name(&dgram->dest_name,dstname,dest_type);
+
+	ptr = &dgram->data[0];
+
+	/* Setup the smb part. */
+	ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
+	memcpy(tmp,ptr,4);
+
+	if (smb_size + 17*2 + strlen(mailslot) + 1 + len > MAX_DGRAM_SIZE) {
+		DEBUG(0, ("cli_send_mailslot: Cannot write beyond end of packet\n"));
+		return False;
+	}
+
+	cli_set_message(ptr,17,strlen(mailslot) + 1 + len,True);
+	memcpy(ptr,tmp,4);
+
+	SCVAL(ptr,smb_com,SMBtrans);
+	SSVAL(ptr,smb_vwv1,len);
+	SSVAL(ptr,smb_vwv11,len);
+	SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
+	SSVAL(ptr,smb_vwv13,3);
+	SSVAL(ptr,smb_vwv14,1);
+	SSVAL(ptr,smb_vwv15,priority);
+	SSVAL(ptr,smb_vwv16,2);
+	p2 = smb_buf(ptr);
+	fstrcpy(p2,mailslot);
+	p2 = skip_string(ptr,MAX_DGRAM_SIZE,p2);
+	if (!p2) {
+		return False;
+	}
+
+	memcpy(p2,buf,len);
+	p2 += len;
+
+	dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
+
+	p->packet_type = DGRAM_PACKET;
+	p->ip = ((const struct sockaddr_in *)dest_ss)->sin_addr;
+	p->timestamp = time(NULL);
+
+	DEBUG(4,("send_mailslot: Sending to mailslot %s from %s ",
+		 mailslot, nmb_namestr(&dgram->source_name)));
+	print_sockaddr(addr, sizeof(addr), dest_ss);
+
+	DEBUGADD(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), addr));
+
+	return true;
+}
+
+static char *mailslot_name(TALLOC_CTX *mem_ctx, struct in_addr dc_ip)
+{
+	return talloc_asprintf(mem_ctx, "%s%X",
+			       NBT_MAILSLOT_GETDC, dc_ip.s_addr);
+}
+
+static bool prep_getdc_request(const struct sockaddr_storage *dc_ss,
+			       const char *account_name,
+			       uint32_t account_flags,
+			       const char *domain_name,
+			       const struct dom_sid *sid,
+			       uint32_t nt_version,
+			       const char *my_mailslot,
+			       int dgm_id,
+			       struct packet_struct *p)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct nbt_netlogon_packet packet;
+	struct NETLOGON_SAM_LOGON_REQUEST *s;
+	enum ndr_err_code ndr_err;
+	DATA_BLOB blob = data_blob_null;
+	struct dom_sid my_sid;
+	bool ret = false;
+
+	ZERO_STRUCT(packet);
+	ZERO_STRUCT(my_sid);
+
+	if (sid != NULL) {
+		my_sid = *sid;
+	}
+
+	packet.command	= LOGON_SAM_LOGON_REQUEST;
+	s		= &packet.req.logon;
+
+	s->request_count	= 0;
+	s->computer_name	= lp_netbios_name();
+	s->user_name		= account_name;
+	s->mailslot_name	= my_mailslot;
+	s->acct_control		= account_flags;
+	s->sid			= my_sid;
+	s->nt_version		= nt_version;
+	s->lmnt_token		= 0xffff;
+	s->lm20_token		= 0xffff;
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_DEBUG(nbt_netlogon_packet, &packet);
+	}
+
+	ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &packet,
+		       (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		goto fail;
+	}
+
+	ret = cli_prep_mailslot(false, NBT_MAILSLOT_NTLOGON, 0,
+				(char *)blob.data, blob.length,
+				lp_netbios_name(), 0, domain_name, 0x1c,
+				dc_ss, dgm_id, p);
+fail:
+	TALLOC_FREE(frame);
+	return ret;
+}
+
+static bool parse_getdc_response(
+	struct packet_struct *packet,
+	TALLOC_CTX *mem_ctx,
+	const char *domain_name,
+	uint32_t *nt_version,
+	const char **dc_name,
+	struct netlogon_samlogon_response **samlogon_response)
+{
+	DATA_BLOB blob;
+	struct netlogon_samlogon_response *r;
+	union dgram_message_body p;
+	enum ndr_err_code ndr_err;
+	NTSTATUS status;
+
+	const char *returned_dc = NULL;
+	const char *returned_domain = NULL;
+
+	blob = data_blob_const(packet->packet.dgram.data,
+			       packet->packet.dgram.datasize);
+	if (blob.length < 4) {
+		DEBUG(1, ("invalid length: %d\n", (int)blob.length));
+		return false;
+	}
+
+	if (RIVAL(blob.data,0) != DGRAM_SMB) {
+		DEBUG(1, ("invalid packet\n"));
+		return false;
+	}
+
+	blob.data += 4;
+	blob.length -= 4;
+
+	ndr_err = ndr_pull_union_blob_all(&blob, mem_ctx, &p, DGRAM_SMB,
+		       (ndr_pull_flags_fn_t)ndr_pull_dgram_smb_packet);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		DEBUG(1, ("failed to parse packet\n"));
+		return false;
+	}
+
+	if (p.smb.smb_command != SMB_TRANSACTION) {
+		DEBUG(1, ("invalid smb_command: %d\n", p.smb.smb_command));
+		return false;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_DEBUG(dgram_smb_packet, &p);
+	}
+
+	blob = p.smb.body.trans.data;
+
+	r = talloc_zero(mem_ctx, struct netlogon_samlogon_response);
+	if (!r) {
+		return false;
+	}
+
+	status = pull_netlogon_samlogon_response(&blob, r, r);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(r);
+		return false;
+	}
+
+	map_netlogon_samlogon_response(r);
+
+	/* do we still need this ? */
+	*nt_version = r->ntver;
+
+	returned_domain = r->data.nt5_ex.domain_name;
+	returned_dc = r->data.nt5_ex.pdc_name;
+
+	if (!strequal(returned_domain, domain_name)) {
+		DEBUG(3, ("GetDC: Expected domain %s, got %s\n",
+			  domain_name, returned_domain));
+		TALLOC_FREE(r);
+		return false;
+	}
+
+	if (*returned_dc == '\\') returned_dc += 1;
+	if (*returned_dc == '\\') returned_dc += 1;
+
+	*dc_name = talloc_strdup(mem_ctx, returned_dc);
+	if (!*dc_name) {
+		TALLOC_FREE(r);
+		return false;
+	}
+
+	if (samlogon_response) {
+		*samlogon_response = r;
+	} else {
+		TALLOC_FREE(r);
+	}
+
+	DEBUG(10, ("GetDC gave name %s for domain %s\n",
+		   *dc_name, returned_domain));
+
+	return True;
+}
+
+struct nbt_getdc_state {
+	struct tevent_context *ev;
+	struct messaging_context *msg_ctx;
+	struct nb_packet_reader *reader;
+	const char *my_mailslot;
+	pid_t nmbd_pid;
+
+	const struct sockaddr_storage *dc_addr;
+	const char *domain_name;
+	const struct dom_sid *sid;
+	uint32_t nt_version;
+	const char *dc_name;
+	struct netlogon_samlogon_response *samlogon_response;
+
+	struct packet_struct p;
+};
+
+static void nbt_getdc_got_reader(struct tevent_req *subreq);
+static void nbt_getdc_got_response(struct tevent_req *subreq);
+
+struct tevent_req *nbt_getdc_send(TALLOC_CTX *mem_ctx,
+				  struct tevent_context *ev,
+				  struct messaging_context *msg_ctx,
+				  const struct sockaddr_storage *dc_addr,
+				  const char *domain_name,
+				  const struct dom_sid *sid,
+				  const char *account_name,
+				  uint32_t account_flags,
+				  uint32_t nt_version)
+{
+	struct tevent_req *req, *subreq;
+	struct nbt_getdc_state *state;
+	uint16_t dgm_id;
+	bool ok;
+
+	req = tevent_req_create(mem_ctx, &state, struct nbt_getdc_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->ev = ev;
+	state->msg_ctx = msg_ctx;
+	state->dc_addr = dc_addr;
+	state->domain_name = domain_name;
+	state->sid = sid;
+	state->nt_version = nt_version;
+
+	if (dc_addr->ss_family != AF_INET) {
+		tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
+		return tevent_req_post(req, ev);
+	}
+	state->my_mailslot = mailslot_name(
+		state, ((const struct sockaddr_in *)dc_addr)->sin_addr);
+	if (tevent_req_nomem(state->my_mailslot, req)) {
+		return tevent_req_post(req, ev);
+	}
+	state->nmbd_pid = pidfile_pid(lp_pid_directory(), "nmbd");
+	if (state->nmbd_pid == 0) {
+		DEBUG(3, ("No nmbd found\n"));
+		tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
+		return tevent_req_post(req, ev);
+	}
+
+	generate_random_buffer((uint8_t *)(void *)&dgm_id, sizeof(dgm_id));
+
+	ok = prep_getdc_request(dc_addr, account_name, account_flags,
+				domain_name, sid, nt_version,
+				state->my_mailslot, dgm_id & 0x7fff,
+				&state->p);
+
+	if (!ok) {
+		DEBUG(3, ("prep_getdc_request failed\n"));
+		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+		return tevent_req_post(req, ev);
+	}
+
+	subreq = nb_packet_reader_send(state, ev, DGRAM_PACKET, -1,
+				       state->my_mailslot);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, nbt_getdc_got_reader, req);
+	return req;
+}
+
+static void nbt_getdc_got_reader(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct nbt_getdc_state *state = tevent_req_data(
+		req, struct nbt_getdc_state);
+	NTSTATUS status;
+
+	status = nb_packet_reader_recv(subreq, state, &state->reader);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		DEBUG(10, ("nb_packet_reader_recv returned %s\n",
+			   nt_errstr(status)));
+		return;
+	}
+
+	status = messaging_send_buf(
+		state->msg_ctx, pid_to_procid(state->nmbd_pid),
+		MSG_SEND_PACKET, (uint8_t *)&state->p, sizeof(state->p));
+
+	if (tevent_req_nterror(req, status)) {
+		DEBUG(10, ("messaging_send_buf returned %s\n",
+			   nt_errstr(status)));
+		return;
+	}
+	subreq = nb_packet_read_send(state, state->ev, state->reader);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, nbt_getdc_got_response, req);
+}
+
+static void nbt_getdc_got_response(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct nbt_getdc_state *state = tevent_req_data(
+		req, struct nbt_getdc_state);
+	struct packet_struct *p;
+	NTSTATUS status;
+	bool ret;
+
+	status = nb_packet_read_recv(subreq, state, &p);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	ret = parse_getdc_response(p, state, state->domain_name,
+				   &state->nt_version, &state->dc_name,
+				   &state->samlogon_response);
+	if (!ret) {
+		tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+		return;
+	}
+	tevent_req_done(req);
+}
+
+NTSTATUS nbt_getdc_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+			uint32_t *nt_version, const char **dc_name,
+			struct netlogon_samlogon_response **samlogon_response)
+{
+	struct nbt_getdc_state *state = tevent_req_data(
+		req, struct nbt_getdc_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+	if (nt_version != NULL) {
+		*nt_version = state->nt_version;
+	}
+	if (dc_name != NULL) {
+		*dc_name = talloc_move(mem_ctx, &state->dc_name);
+	}
+	if (samlogon_response != NULL) {
+		*samlogon_response = talloc_move(
+			mem_ctx, &state->samlogon_response);
+	}
+	return NT_STATUS_OK;
+}
+
+NTSTATUS nbt_getdc(struct messaging_context *msg_ctx,
+		   uint32_t timeout_in_seconds,
+		   const struct sockaddr_storage *dc_addr,
+		   const char *domain_name,
+		   const struct dom_sid *sid,
+		   const char *account_name,
+		   uint32_t account_flags,
+		   uint32_t nt_version,
+		   TALLOC_CTX *mem_ctx,
+		   uint32_t *pnt_version,
+		   const char **dc_name,
+		   struct netlogon_samlogon_response **samlogon_response)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct tevent_context *ev;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+	ev = samba_tevent_context_init(frame);
+	if (ev == NULL) {
+		goto fail;
+	}
+	req = nbt_getdc_send(ev, ev, msg_ctx, dc_addr, domain_name,
+			     sid, account_name, account_flags, nt_version);
+	if (req == NULL) {
+		goto fail;
+	}
+	if (!tevent_req_set_endtime(req, ev,
+			timeval_current_ofs(timeout_in_seconds, 0))) {
+		goto fail;
+	}
+	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+		goto fail;
+	}
+	status = nbt_getdc_recv(req, mem_ctx, pnt_version, dc_name,
+				samlogon_response);
+ fail:
+	TALLOC_FREE(frame);
+	return status;
+}