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-rw-r--r--source3/libsmb/clidgram.c482
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;
+}
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