/* 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_netlogon_packet packet; struct NETLOGON_SAM_LOGON_REQUEST *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 = LOGON_SAM_LOGON_REQUEST; 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_netlogon_packet, &packet); } ndr_err = ndr_push_struct_blob(&blob, mem_ctx, NULL, &packet, (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_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, struct netlogon_samlogon_response **_r) { struct packet_struct *packet; const char *my_mailslot = NULL; struct in_addr dc_ip; 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; 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, NULL, &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; ZERO_STRUCT(r); status = pull_netlogon_samlogon_response(&blob, mem_ctx, NULL, &r); if (!NT_STATUS_IS_OK(status)) { return false; } map_netlogon_samlogon_response(&r); /* do we still need this ? */ *nt_version = r.ntver; returned_domain = r.data.nt5_ex.domain; 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)); 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 (_r) { *_r = (struct netlogon_samlogon_response *)talloc_memdup( mem_ctx, &r, sizeof(struct netlogon_samlogon_response)); if (!*_r) { return false; } } DEBUG(10, ("GetDC gave name %s for domain %s\n", *dc_name, returned_domain)); return True; }