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-rw-r--r--source3/libsmb/clidgram.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/source3/libsmb/clidgram.c b/source3/libsmb/clidgram.c
new file mode 100644
index 0000000000..8b35a69def
--- /dev/null
+++ b/source3/libsmb/clidgram.c
@@ -0,0 +1,357 @@
+/*
+ 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"
+
+/*
+ * cli_send_mailslot, send a mailslot for client code ...
+ */
+
+bool cli_send_mailslot(struct messaging_context *msg_ctx,
+ bool unique, const char *mailslot,
+ uint16 priority,
+ char *buf, int len,
+ const char *srcname, int src_type,
+ const char *dstname, int dest_type,
+ const struct sockaddr_storage *dest_ss)
+{
+ struct packet_struct p;
+ struct dgram_packet *dgram = &p.packet.dgram;
+ char *ptr, *p2;
+ char tmp[4];
+ pid_t nmbd_pid;
+ char addr[INET6_ADDRSTRLEN];
+
+ if ((nmbd_pid = pidfile_pid("nmbd")) == 0) {
+ DEBUG(3, ("No nmbd found\n"));
+ return False;
+ }
+
+ if (dest_ss->ss_family != AF_INET) {
+ DEBUG(3, ("cli_send_mailslot: can't send to IPv6 address.\n"));
+ return false;
+ }
+
+ memset((char *)&p, '\0', sizeof(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 = ((unsigned)time(NULL)%(unsigned)0x7FFF) +
+ ((unsigned)sys_getpid()%(unsigned)100);
+ /* 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 NT_STATUS_IS_OK(messaging_send_buf(msg_ctx,
+ pid_to_procid(nmbd_pid),
+ MSG_SEND_PACKET,
+ (uint8 *)&p, sizeof(p)));
+}
+
+static const 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);
+}
+
+bool send_getdc_request(TALLOC_CTX *mem_ctx,
+ struct messaging_context *msg_ctx,
+ struct sockaddr_storage *dc_ss,
+ const char *domain_name,
+ const DOM_SID *sid,
+ uint32_t nt_version)
+{
+ struct in_addr dc_ip;
+ const char *my_acct_name = NULL;
+ const char *my_mailslot = NULL;
+ struct nbt_ntlogon_packet packet;
+ struct nbt_ntlogon_sam_logon *s;
+ enum ndr_err_code ndr_err;
+ DATA_BLOB blob;
+ struct dom_sid my_sid;
+
+ ZERO_STRUCT(packet);
+ ZERO_STRUCT(my_sid);
+
+ if (dc_ss->ss_family != AF_INET) {
+ return false;
+ }
+
+ if (sid) {
+ my_sid = *sid;
+ }
+
+ dc_ip = ((struct sockaddr_in *)dc_ss)->sin_addr;
+ my_mailslot = mailslot_name(mem_ctx, dc_ip);
+ if (!my_mailslot) {
+ return false;
+ }
+
+ my_acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname());
+ if (!my_acct_name) {
+ return false;
+ }
+
+ packet.command = NTLOGON_SAM_LOGON;
+ s = &packet.req.logon;
+
+ s->request_count = 0;
+ s->computer_name = global_myname();
+ s->user_name = my_acct_name;
+ s->mailslot_name = my_mailslot;
+ s->acct_control = ACB_WSTRUST;
+ s->sid = my_sid;
+ s->nt_version = nt_version;
+ s->lmnt_token = 0xffff;
+ s->lm20_token = 0xffff;
+
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_DEBUG(nbt_ntlogon_packet, &packet);
+ }
+
+ ndr_err = ndr_push_struct_blob(&blob, mem_ctx, &packet,
+ (ndr_push_flags_fn_t)ndr_push_nbt_ntlogon_packet);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return false;
+ }
+
+ return cli_send_mailslot(msg_ctx,
+ false, NBT_MAILSLOT_NTLOGON, 0,
+ (char *)blob.data, blob.length,
+ global_myname(), 0, domain_name, 0x1c,
+ dc_ss);
+}
+
+bool receive_getdc_response(TALLOC_CTX *mem_ctx,
+ struct sockaddr_storage *dc_ss,
+ const char *domain_name,
+ uint32_t *nt_version,
+ const char **dc_name,
+ union nbt_cldap_netlogon **reply)
+{
+ struct packet_struct *packet;
+ const char *my_mailslot = NULL;
+ struct in_addr dc_ip;
+ DATA_BLOB blob;
+ union nbt_cldap_netlogon r;
+ union dgram_message_body p;
+ enum ndr_err_code ndr_err;
+
+ const char *returned_dc = NULL;
+ const char *returned_domain = NULL;
+
+ if (dc_ss->ss_family != AF_INET) {
+ return false;
+ }
+
+ dc_ip = ((struct sockaddr_in *)dc_ss)->sin_addr;
+
+ my_mailslot = mailslot_name(mem_ctx, dc_ip);
+ if (!my_mailslot) {
+ return false;
+ }
+
+ packet = receive_unexpected(DGRAM_PACKET, 0, my_mailslot);
+
+ if (packet == NULL) {
+ DEBUG(5, ("Did not receive packet for %s\n", my_mailslot));
+ return False;
+ }
+
+ DEBUG(5, ("Received packet for %s\n", my_mailslot));
+
+ blob = data_blob_const(packet->packet.dgram.data,
+ packet->packet.dgram.datasize);
+
+ if (blob.length < 4) {
+ DEBUG(0,("invalid length: %d\n", (int)blob.length));
+ return false;
+ }
+
+ if (RIVAL(blob.data,0) != DGRAM_SMB) {
+ DEBUG(0,("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(0,("failed to parse packet\n"));
+ return false;
+ }
+
+ if (p.smb.smb_command != SMB_TRANSACTION) {
+ DEBUG(0,("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;
+
+ if (!pull_mailslot_cldap_reply(mem_ctx, &blob,
+ &r, nt_version))
+ {
+ return false;
+ }
+
+ switch (*nt_version) {
+ case 1:
+ case 16:
+ case 17:
+
+ returned_domain = r.logon1.domain_name;
+ returned_dc = r.logon1.pdc_name;
+ break;
+ case 2:
+ case 3:
+ case 18:
+ case 19:
+ returned_domain = r.logon3.domain_name;
+ returned_dc = r.logon3.pdc_name;
+ break;
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ returned_domain = r.logon5.domain;
+ returned_dc = r.logon5.pdc_name;
+ break;
+ case 8:
+ case 9:
+ case 10:
+ case 11:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ returned_domain = r.logon13.domain;
+ returned_dc = r.logon13.pdc_name;
+ break;
+ case 20:
+ case 21:
+ case 22:
+ case 23:
+ case 24:
+ case 25:
+ case 26:
+ case 27:
+ case 28:
+ returned_domain = r.logon15.domain;
+ returned_dc = r.logon15.pdc_name;
+ break;
+ case 29:
+ case 30:
+ case 31:
+ returned_domain = r.logon29.domain;
+ returned_dc = r.logon29.pdc_name;
+ break;
+ default:
+ return false;
+ }
+
+ if (!strequal(returned_domain, domain_name)) {
+ DEBUG(3, ("GetDC: Expected domain %s, got %s\n",
+ domain_name, returned_domain));
+ return false;
+ }
+
+ *dc_name = talloc_strdup(mem_ctx, returned_dc);
+ if (!*dc_name) {
+ return false;
+ }
+
+ if (**dc_name == '\\') *dc_name += 1;
+ if (**dc_name == '\\') *dc_name += 1;
+
+ if (reply) {
+ *reply = (union nbt_cldap_netlogon *)talloc_memdup(
+ mem_ctx, &r, sizeof(union nbt_cldap_netlogon));
+ if (!*reply) {
+ return false;
+ }
+ }
+
+ DEBUG(10, ("GetDC gave name %s for domain %s\n",
+ *dc_name, returned_domain));
+
+ return True;
+}
+
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