diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/smb_server/config.mk | 1 | ||||
| -rw-r--r-- | source4/smb_server/receive.c | 633 | ||||
| -rw-r--r-- | source4/smb_server/smb_server.c | 611 |
3 files changed, 637 insertions, 608 deletions
diff --git a/source4/smb_server/config.mk b/source4/smb_server/config.mk index c1eadf9397..14b24b19b0 100644 --- a/source4/smb_server/config.mk +++ b/source4/smb_server/config.mk @@ -10,6 +10,7 @@ ADD_OBJ_FILES = \ negprot.o \ nttrans.o \ session.o \ + receive.o \ reply.o \ request.o \ search.o \ diff --git a/source4/smb_server/receive.c b/source4/smb_server/receive.c new file mode 100644 index 0000000000..b339f1391a --- /dev/null +++ b/source4/smb_server/receive.c @@ -0,0 +1,633 @@ +/* + Unix SMB/CIFS implementation. + process incoming packets - main loop + Copyright (C) Andrew Tridgell 1992-2005 + Copyright (C) James J Myers 2003 <myersjj@samba.org> + Copyright (C) Stefan Metzmacher 2004-2005 + + 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 2 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "lib/events/events.h" +#include "system/time.h" +#include "dlinklist.h" +#include "smbd/service_stream.h" +#include "smb_server/smb_server.h" +#include "lib/messaging/irpc.h" +#include "lib/stream/packet.h" + + +/* + send an oplock break request to a client +*/ +BOOL req_send_oplock_break(struct smbsrv_tcon *tcon, uint16_t fnum, uint8_t level) +{ + struct smbsrv_request *req; + + req = init_smb_request(tcon->smb_conn); + + req_setup_reply(req, 8, 0); + + SCVAL(req->out.hdr,HDR_COM,SMBlockingX); + SSVAL(req->out.hdr,HDR_TID,tcon->tid); + SSVAL(req->out.hdr,HDR_PID,0xFFFF); + SSVAL(req->out.hdr,HDR_UID,0); + SSVAL(req->out.hdr,HDR_MID,0xFFFF); + SCVAL(req->out.hdr,HDR_FLG,0); + SSVAL(req->out.hdr,HDR_FLG2,0); + + SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); + SSVAL(req->out.vwv, VWV(1), 0); + SSVAL(req->out.vwv, VWV(2), fnum); + SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE); + SCVAL(req->out.vwv, VWV(3)+1, level); + SIVAL(req->out.vwv, VWV(4), 0); + SSVAL(req->out.vwv, VWV(6), 0); + SSVAL(req->out.vwv, VWV(7), 0); + + req_send_reply(req); + return True; +} + +static void switch_message(int type, struct smbsrv_request *req); + +/**************************************************************************** +receive a SMB request header from the wire, forming a request_context +from the result +****************************************************************************/ +NTSTATUS smbsrv_recv_smb_request(void *private, DATA_BLOB blob) +{ + struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection); + struct smbsrv_request *req; + uint8_t command; + + /* see if its a special NBT packet */ + if (CVAL(blob.data, 0) != 0) { + req = init_smb_request(smb_conn); + NT_STATUS_HAVE_NO_MEMORY(req); + + ZERO_STRUCT(req->in); + + req->in.buffer = talloc_steal(req, blob.data); + req->in.size = blob.length; + req->request_time = timeval_current(); + + reply_special(req); + return NT_STATUS_OK; + } + + if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) { + DEBUG(2,("Invalid SMB packet: length %d\n", blob.length)); + smbsrv_terminate_connection(smb_conn, "Invalid SMB packet"); + return NT_STATUS_OK; + } + + /* Make sure this is an SMB packet */ + if (IVAL(blob.data, NBT_HDR_SIZE) != SMB_MAGIC) { + DEBUG(2,("Non-SMB packet of length %d. Terminating connection\n", + blob.length)); + smbsrv_terminate_connection(smb_conn, "Non-SMB packet"); + return NT_STATUS_OK; + } + + req = init_smb_request(smb_conn); + NT_STATUS_HAVE_NO_MEMORY(req); + + req->in.buffer = talloc_steal(req, blob.data); + req->in.size = blob.length; + req->request_time = timeval_current(); + req->chained_fnum = -1; + req->in.allocated = req->in.size; + req->in.hdr = req->in.buffer + NBT_HDR_SIZE; + req->in.vwv = req->in.hdr + HDR_VWV; + req->in.wct = CVAL(req->in.hdr, HDR_WCT); + if (req->in.vwv + VWV(req->in.wct) <= req->in.buffer + req->in.size) { + req->in.data = req->in.vwv + VWV(req->in.wct) + 2; + req->in.data_size = SVAL(req->in.vwv, VWV(req->in.wct)); + + /* the bcc length is only 16 bits, but some packets + (such as SMBwriteX) can be much larger than 64k. We + detect this by looking for a large non-chained NBT + packet (at least 64k bigger than what is + specified). If it is detected then the NBT size is + used instead of the bcc size */ + if (req->in.data_size + 0x10000 <= + req->in.size - PTR_DIFF(req->in.data, req->in.buffer) && + (req->in.wct < 1 || SVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE)) { + /* its an oversized packet! fun for all the family */ + req->in.data_size = req->in.size - PTR_DIFF(req->in.data,req->in.buffer); + } + } + + if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct > req->in.size) { + DEBUG(2,("Invalid SMB word count %d\n", req->in.wct)); + smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); + return NT_STATUS_OK; + } + + if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct + req->in.data_size > req->in.size) { + DEBUG(2,("Invalid SMB buffer length count %d\n", req->in.data_size)); + smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); + return NT_STATUS_OK; + } + + req->flags = CVAL(req->in.hdr, HDR_FLG); + req->flags2 = SVAL(req->in.hdr, HDR_FLG2); + req->smbpid = SVAL(req->in.hdr, HDR_PID); + + if (!req_signing_check_incoming(req)) { + req_reply_error(req, NT_STATUS_ACCESS_DENIED); + return NT_STATUS_OK; + } + + command = CVAL(req->in.hdr, HDR_COM); + switch_message(command, req); + return NT_STATUS_OK; +} + +/* + These flags determine some of the permissions required to do an operation +*/ +#define AS_USER (1<<0) +#define SIGNING_NO_REPLY (1<<1) + +/* + define a list of possible SMB messages and their corresponding + functions. Any message that has a NULL function is unimplemented - + please feel free to contribute implementations! +*/ +static const struct smb_message_struct +{ + const char *name; + void (*fn)(struct smbsrv_request *); + int flags; +} + smb_messages[256] = { +/* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER}, +/* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER}, +/* 0x02 */ { "SMBopen",reply_open,AS_USER}, +/* 0x03 */ { "SMBcreate",reply_mknew,AS_USER}, +/* 0x04 */ { "SMBclose",reply_close,AS_USER}, +/* 0x05 */ { "SMBflush",reply_flush,AS_USER}, +/* 0x06 */ { "SMBunlink",reply_unlink,AS_USER}, +/* 0x07 */ { "SMBmv",reply_mv,AS_USER}, +/* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER}, +/* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER}, +/* 0x0a */ { "SMBread",reply_read,AS_USER}, +/* 0x0b */ { "SMBwrite",reply_write,AS_USER}, +/* 0x0c */ { "SMBlock",reply_lock,AS_USER}, +/* 0x0d */ { "SMBunlock",reply_unlock,AS_USER}, +/* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER }, +/* 0x0f */ { "SMBmknew",reply_mknew,AS_USER}, +/* 0x10 */ { "SMBchkpth",reply_chkpth,AS_USER}, +/* 0x11 */ { "SMBexit",reply_exit,0}, +/* 0x12 */ { "SMBlseek",reply_lseek,AS_USER}, +/* 0x13 */ { "SMBlockread",reply_lockread,AS_USER}, +/* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER}, +/* 0x15 */ { NULL, NULL, 0 }, +/* 0x16 */ { NULL, NULL, 0 }, +/* 0x17 */ { NULL, NULL, 0 }, +/* 0x18 */ { NULL, NULL, 0 }, +/* 0x19 */ { NULL, NULL, 0 }, +/* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER}, +/* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER}, +/* 0x1c */ { "SMBreadBs",NULL,0 }, +/* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER}, +/* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER}, +/* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER}, +/* 0x20 */ { "SMBwritec",NULL,0}, +/* 0x21 */ { NULL, NULL, 0 }, +/* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER}, +/* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER}, +/* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER}, +/* 0x25 */ { "SMBtrans",reply_trans,AS_USER}, +/* 0x26 */ { "SMBtranss",reply_transs,AS_USER}, +/* 0x27 */ { "SMBioctl",reply_ioctl,AS_USER}, +/* 0x28 */ { "SMBioctls",NULL,AS_USER}, +/* 0x29 */ { "SMBcopy",reply_copy,AS_USER}, +/* 0x2a */ { "SMBmove",NULL,AS_USER}, +/* 0x2b */ { "SMBecho",reply_echo,0}, +/* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER}, +/* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER}, +/* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER}, +/* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER}, +/* 0x30 */ { NULL, NULL, 0 }, +/* 0x31 */ { NULL, NULL, 0 }, +/* 0x32 */ { "SMBtrans2", reply_trans2, AS_USER}, +/* 0x33 */ { "SMBtranss2", reply_transs2, AS_USER}, +/* 0x34 */ { "SMBfindclose", reply_findclose,AS_USER}, +/* 0x35 */ { "SMBfindnclose", reply_findnclose, AS_USER}, +/* 0x36 */ { NULL, NULL, 0 }, +/* 0x37 */ { NULL, NULL, 0 }, +/* 0x38 */ { NULL, NULL, 0 }, +/* 0x39 */ { NULL, NULL, 0 }, +/* 0x3a */ { NULL, NULL, 0 }, +/* 0x3b */ { NULL, NULL, 0 }, +/* 0x3c */ { NULL, NULL, 0 }, +/* 0x3d */ { NULL, NULL, 0 }, +/* 0x3e */ { NULL, NULL, 0 }, +/* 0x3f */ { NULL, NULL, 0 }, +/* 0x40 */ { NULL, NULL, 0 }, +/* 0x41 */ { NULL, NULL, 0 }, +/* 0x42 */ { NULL, NULL, 0 }, +/* 0x43 */ { NULL, NULL, 0 }, +/* 0x44 */ { NULL, NULL, 0 }, +/* 0x45 */ { NULL, NULL, 0 }, +/* 0x46 */ { NULL, NULL, 0 }, +/* 0x47 */ { NULL, NULL, 0 }, +/* 0x48 */ { NULL, NULL, 0 }, +/* 0x49 */ { NULL, NULL, 0 }, +/* 0x4a */ { NULL, NULL, 0 }, +/* 0x4b */ { NULL, NULL, 0 }, +/* 0x4c */ { NULL, NULL, 0 }, +/* 0x4d */ { NULL, NULL, 0 }, +/* 0x4e */ { NULL, NULL, 0 }, +/* 0x4f */ { NULL, NULL, 0 }, +/* 0x50 */ { NULL, NULL, 0 }, +/* 0x51 */ { NULL, NULL, 0 }, +/* 0x52 */ { NULL, NULL, 0 }, +/* 0x53 */ { NULL, NULL, 0 }, +/* 0x54 */ { NULL, NULL, 0 }, +/* 0x55 */ { NULL, NULL, 0 }, +/* 0x56 */ { NULL, NULL, 0 }, +/* 0x57 */ { NULL, NULL, 0 }, +/* 0x58 */ { NULL, NULL, 0 }, +/* 0x59 */ { NULL, NULL, 0 }, +/* 0x5a */ { NULL, NULL, 0 }, +/* 0x5b */ { NULL, NULL, 0 }, +/* 0x5c */ { NULL, NULL, 0 }, +/* 0x5d */ { NULL, NULL, 0 }, +/* 0x5e */ { NULL, NULL, 0 }, +/* 0x5f */ { NULL, NULL, 0 }, +/* 0x60 */ { NULL, NULL, 0 }, +/* 0x61 */ { NULL, NULL, 0 }, +/* 0x62 */ { NULL, NULL, 0 }, +/* 0x63 */ { NULL, NULL, 0 }, +/* 0x64 */ { NULL, NULL, 0 }, +/* 0x65 */ { NULL, NULL, 0 }, +/* 0x66 */ { NULL, NULL, 0 }, +/* 0x67 */ { NULL, NULL, 0 }, +/* 0x68 */ { NULL, NULL, 0 }, +/* 0x69 */ { NULL, NULL, 0 }, +/* 0x6a */ { NULL, NULL, 0 }, +/* 0x6b */ { NULL, NULL, 0 }, +/* 0x6c */ { NULL, NULL, 0 }, +/* 0x6d */ { NULL, NULL, 0 }, +/* 0x6e */ { NULL, NULL, 0 }, +/* 0x6f */ { NULL, NULL, 0 }, +/* 0x70 */ { "SMBtcon",reply_tcon,0}, +/* 0x71 */ { "SMBtdis",reply_tdis,0}, +/* 0x72 */ { "SMBnegprot",reply_negprot,0}, +/* 0x73 */ { "SMBsesssetupX",reply_sesssetup,0}, +/* 0x74 */ { "SMBulogoffX", reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */ +/* 0x75 */ { "SMBtconX",reply_tcon_and_X,0}, +/* 0x76 */ { NULL, NULL, 0 }, +/* 0x77 */ { NULL, NULL, 0 }, +/* 0x78 */ { NULL, NULL, 0 }, +/* 0x79 */ { NULL, NULL, 0 }, +/* 0x7a */ { NULL, NULL, 0 }, +/* 0x7b */ { NULL, NULL, 0 }, +/* 0x7c */ { NULL, NULL, 0 }, +/* 0x7d */ { NULL, NULL, 0 }, +/* 0x7e */ { NULL, NULL, 0 }, +/* 0x7f */ { NULL, NULL, 0 }, +/* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER}, +/* 0x81 */ { "SMBsearch",reply_search,AS_USER}, +/* 0x82 */ { "SMBffirst",reply_search,AS_USER}, +/* 0x83 */ { "SMBfunique",reply_search,AS_USER}, +/* 0x84 */ { "SMBfclose",reply_fclose,AS_USER}, +/* 0x85 */ { NULL, NULL, 0 }, +/* 0x86 */ { NULL, NULL, 0 }, +/* 0x87 */ { NULL, NULL, 0 }, +/* 0x88 */ { NULL, NULL, 0 }, +/* 0x89 */ { NULL, NULL, 0 }, +/* 0x8a */ { NULL, NULL, 0 }, +/* 0x8b */ { NULL, NULL, 0 }, +/* 0x8c */ { NULL, NULL, 0 }, +/* 0x8d */ { NULL, NULL, 0 }, +/* 0x8e */ { NULL, NULL, 0 }, +/* 0x8f */ { NULL, NULL, 0 }, +/* 0x90 */ { NULL, NULL, 0 }, +/* 0x91 */ { NULL, NULL, 0 }, +/* 0x92 */ { NULL, NULL, 0 }, +/* 0x93 */ { NULL, NULL, 0 }, +/* 0x94 */ { NULL, NULL, 0 }, +/* 0x95 */ { NULL, NULL, 0 }, +/* 0x96 */ { NULL, NULL, 0 }, +/* 0x97 */ { NULL, NULL, 0 }, +/* 0x98 */ { NULL, NULL, 0 }, +/* 0x99 */ { NULL, NULL, 0 }, +/* 0x9a */ { NULL, NULL, 0 }, +/* 0x9b */ { NULL, NULL, 0 }, +/* 0x9c */ { NULL, NULL, 0 }, +/* 0x9d */ { NULL, NULL, 0 }, +/* 0x9e */ { NULL, NULL, 0 }, +/* 0x9f */ { NULL, NULL, 0 }, +/* 0xa0 */ { "SMBnttrans", reply_nttrans, AS_USER}, +/* 0xa1 */ { "SMBnttranss", reply_nttranss, AS_USER}, +/* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X, AS_USER}, +/* 0xa3 */ { NULL, NULL, 0 }, +/* 0xa4 */ { "SMBntcancel", reply_ntcancel, AS_USER|SIGNING_NO_REPLY}, +/* 0xa5 */ { "SMBntrename", reply_ntrename, AS_USER}, +/* 0xa6 */ { NULL, NULL, 0 }, +/* 0xa7 */ { NULL, NULL, 0 }, +/* 0xa8 */ { NULL, NULL, 0 }, +/* 0xa9 */ { NULL, NULL, 0 }, +/* 0xaa */ { NULL, NULL, 0 }, +/* 0xab */ { NULL, NULL, 0 }, +/* 0xac */ { NULL, NULL, 0 }, +/* 0xad */ { NULL, NULL, 0 }, +/* 0xae */ { NULL, NULL, 0 }, +/* 0xaf */ { NULL, NULL, 0 }, +/* 0xb0 */ { NULL, NULL, 0 }, +/* 0xb1 */ { NULL, NULL, 0 }, +/* 0xb2 */ { NULL, NULL, 0 }, +/* 0xb3 */ { NULL, NULL, 0 }, +/* 0xb4 */ { NULL, NULL, 0 }, +/* 0xb5 */ { NULL, NULL, 0 }, +/* 0xb6 */ { NULL, NULL, 0 }, +/* 0xb7 */ { NULL, NULL, 0 }, +/* 0xb8 */ { NULL, NULL, 0 }, +/* 0xb9 */ { NULL, NULL, 0 }, +/* 0xba */ { NULL, NULL, 0 }, +/* 0xbb */ { NULL, NULL, 0 }, +/* 0xbc */ { NULL, NULL, 0 }, +/* 0xbd */ { NULL, NULL, 0 }, +/* 0xbe */ { NULL, NULL, 0 }, +/* 0xbf */ { NULL, NULL, 0 }, +/* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER }, +/* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER}, +/* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER}, +/* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER}, +/* 0xc4 */ { NULL, NULL, 0 }, +/* 0xc5 */ { NULL, NULL, 0 }, +/* 0xc6 */ { NULL, NULL, 0 }, +/* 0xc7 */ { NULL, NULL, 0 }, +/* 0xc8 */ { NULL, NULL, 0 }, +/* 0xc9 */ { NULL, NULL, 0 }, +/* 0xca */ { NULL, NULL, 0 }, +/* 0xcb */ { NULL, NULL, 0 }, +/* 0xcc */ { NULL, NULL, 0 }, +/* 0xcd */ { NULL, NULL, 0 }, +/* 0xce */ { NULL, NULL, 0 }, +/* 0xcf */ { NULL, NULL, 0 }, +/* 0xd0 */ { "SMBsends",reply_sends,0}, +/* 0xd1 */ { "SMBsendb",NULL,0}, +/* 0xd2 */ { "SMBfwdname",NULL,0}, +/* 0xd3 */ { "SMBcancelf",NULL,0}, +/* 0xd4 */ { "SMBgetmac",NULL,0}, +/* 0xd5 */ { "SMBsendstrt",reply_sendstrt,0}, +/* 0xd6 */ { "SMBsendend",reply_sendend,0}, +/* 0xd7 */ { "SMBsendtxt",reply_sendtxt,0}, +/* 0xd8 */ { NULL, NULL, 0 }, +/* 0xd9 */ { NULL, NULL, 0 }, +/* 0xda */ { NULL, NULL, 0 }, +/* 0xdb */ { NULL, NULL, 0 }, +/* 0xdc */ { NULL, NULL, 0 }, +/* 0xdd */ { NULL, NULL, 0 }, +/* 0xde */ { NULL, NULL, 0 }, +/* 0xdf */ { NULL, NULL, 0 }, +/* 0xe0 */ { NULL, NULL, 0 }, +/* 0xe1 */ { NULL, NULL, 0 }, +/* 0xe2 */ { NULL, NULL, 0 }, +/* 0xe3 */ { NULL, NULL, 0 }, +/* 0xe4 */ { NULL, NULL, 0 }, +/* 0xe5 */ { NULL, NULL, 0 }, +/* 0xe6 */ { NULL, NULL, 0 }, +/* 0xe7 */ { NULL, NULL, 0 }, +/* 0xe8 */ { NULL, NULL, 0 }, +/* 0xe9 */ { NULL, NULL, 0 }, +/* 0xea */ { NULL, NULL, 0 }, +/* 0xeb */ { NULL, NULL, 0 }, +/* 0xec */ { NULL, NULL, 0 }, +/* 0xed */ { NULL, NULL, 0 }, +/* 0xee */ { NULL, NULL, 0 }, +/* 0xef */ { NULL, NULL, 0 }, +/* 0xf0 */ { NULL, NULL, 0 }, +/* 0xf1 */ { NULL, NULL, 0 }, +/* 0xf2 */ { NULL, NULL, 0 }, +/* 0xf3 */ { NULL, NULL, 0 }, +/* 0xf4 */ { NULL, NULL, 0 }, +/* 0xf5 */ { NULL, NULL, 0 }, +/* 0xf6 */ { NULL, NULL, 0 }, +/* 0xf7 */ { NULL, NULL, 0 }, +/* 0xf8 */ { NULL, NULL, 0 }, +/* 0xf9 */ { NULL, NULL, 0 }, +/* 0xfa */ { NULL, NULL, 0 }, +/* 0xfb */ { NULL, NULL, 0 }, +/* 0xfc */ { NULL, NULL, 0 }, +/* 0xfd */ { NULL, NULL, 0 }, +/* 0xfe */ { NULL, NULL, 0 }, +/* 0xff */ { NULL, NULL, 0 } +}; + +/**************************************************************************** +return a string containing the function name of a SMB command +****************************************************************************/ +static const char *smb_fn_name(uint8_t type) +{ + const char *unknown_name = "SMBunknown"; + + if (smb_messages[type].name == NULL) + return unknown_name; + + return smb_messages[type].name; +} + + +/**************************************************************************** + Do a switch on the message type and call the specific reply function for this +message. Unlike earlier versions of Samba the reply functions are responsible +for sending the reply themselves, rather than returning a size to this function +The reply functions may also choose to delay the processing by pushing the message +onto the message queue +****************************************************************************/ +static void switch_message(int type, struct smbsrv_request *req) +{ + int flags; + struct smbsrv_connection *smb_conn = req->smb_conn; + uint16_t session_tag; + NTSTATUS status; + + type &= 0xff; + + errno = 0; + + if (smb_messages[type].fn == NULL) { + DEBUG(0,("Unknown message type %d!\n",type)); + reply_unknown(req); + return; + } + + flags = smb_messages[type].flags; + + req->tcon = smbsrv_tcon_find(smb_conn, SVAL(req->in.hdr,HDR_TID)); + + if (req->session == NULL) { + /* setup the user context for this request if it + hasn't already been initialised (to cope with SMB + chaining) */ + + /* In share mode security we must ignore the vuid. */ + if (smb_conn->config.security == SEC_SHARE) { + session_tag = UID_FIELD_INVALID; + } else { + session_tag = SVAL(req->in.hdr,HDR_UID); + } + + req->session = smbsrv_session_find(req->smb_conn, session_tag); + if (req->session) { + req->session->vuid = session_tag; + } + } else { + session_tag = req->session->vuid; + } + + DEBUG(3,("switch message %s (task_id %d)\n",smb_fn_name(type), req->smb_conn->connection->server_id)); + + /* this must be called before we do any reply */ + if (flags & SIGNING_NO_REPLY) { + req_signing_no_reply(req); + } + + /* see if the vuid is valid */ + if ((flags & AS_USER) && !req->session) { + /* amazingly, the error code depends on the command */ + switch (type) { + case SMBntcreateX: + case SMBntcancel: + status = NT_STATUS_DOS(ERRSRV, ERRbaduid); + break; + default: + status = NT_STATUS_INVALID_HANDLE; + break; + } + /* + * TODO: + * don't know how to handle smb signing for this case + * so just skip the reply + */ + if ((flags & SIGNING_NO_REPLY) && + (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) { + DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n", + smb_fn_name(type), nt_errstr(status))); + req_destroy(req); + return; + } + req_reply_error(req, status); + return; + } + + /* does this protocol need a valid tree connection? */ + if ((flags & AS_USER) && !req->tcon) { + /* amazingly, the error code depends on the command */ + switch (type) { + case SMBntcreateX: + case SMBntcancel: + status = NT_STATUS_DOS(ERRSRV, ERRinvnid); + break; + default: + status = NT_STATUS_INVALID_HANDLE; + break; + } + /* + * TODO: + * don't know how to handle smb signing for this case + * so just skip the reply + */ + if ((flags & SIGNING_NO_REPLY) && + (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) { + DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n", + smb_fn_name(type), nt_errstr(status))); + req_destroy(req); + return; + } + req_reply_error(req, status); + return; + } + + smb_messages[type].fn(req); +} + +/* + we call this when first first part of a possibly chained request has been completed + and we need to call the 2nd part, if any +*/ +void chain_reply(struct smbsrv_request *req) +{ + uint16_t chain_cmd, chain_offset; + uint8_t *vwv, *data; + uint16_t wct; + uint16_t data_size; + + if (req->in.wct < 2 || req->out.wct < 2) { + req_reply_dos_error(req, ERRSRV, ERRerror); + return; + } + + chain_cmd = CVAL(req->in.vwv, VWV(0)); + chain_offset = SVAL(req->in.vwv, VWV(1)); + + if (chain_cmd == SMB_CHAIN_NONE) { + /* end of chain */ + SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); + SSVAL(req->out.vwv, VWV(1), 0); + req_send_reply(req); + return; + } + + if (chain_offset + req->in.hdr >= req->in.buffer + req->in.size) { + goto error; + } + + wct = CVAL(req->in.hdr, chain_offset); + vwv = req->in.hdr + chain_offset + 1; + + if (vwv + VWV(wct) + 2 > req->in.buffer + req->in.size) { + goto error; + } + + data_size = SVAL(vwv, VWV(wct)); + data = vwv + VWV(wct) + 2; + + if (data + data_size > req->in.buffer + req->in.size) { + goto error; + } + + /* all seems legit */ + req->in.vwv = vwv; + req->in.wct = wct; + req->in.data = data; + req->in.data_size = data_size; + req->in.ptr = data; + + req->chain_count++; + + SSVAL(req->out.vwv, VWV(0), chain_cmd); + SSVAL(req->out.vwv, VWV(1), req->out.size - NBT_HDR_SIZE); + + /* the current request in the chain might have used an async reply, + but that doesn't mean the next element needs to */ + ZERO_STRUCTP(req->async_states); + + switch_message(chain_cmd, req); + return; + +error: + SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); + SSVAL(req->out.vwv, VWV(1), 0); + req_reply_dos_error(req, ERRSRV, ERRerror); +} diff --git a/source4/smb_server/smb_server.c b/source4/smb_server/smb_server.c index 340674b8df..060be4eaea 100644 --- a/source4/smb_server/smb_server.c +++ b/source4/smb_server/smb_server.c @@ -1,9 +1,8 @@ /* Unix SMB/CIFS implementation. process incoming packets - main loop - Copyright (C) Andrew Tridgell 1992-2003 - Copyright (C) James J Myers 2003 <myersjj@samba.org> - Copyright (C) Stefan Metzmacher 2004 + Copyright (C) Andrew Tridgell 2004-2005 + Copyright (C) Stefan Metzmacher 2004-2005 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 @@ -29,610 +28,6 @@ #include "lib/messaging/irpc.h" #include "lib/stream/packet.h" - -/* - send an oplock break request to a client -*/ -BOOL req_send_oplock_break(struct smbsrv_tcon *tcon, uint16_t fnum, uint8_t level) -{ - struct smbsrv_request *req; - - req = init_smb_request(tcon->smb_conn); - - req_setup_reply(req, 8, 0); - - SCVAL(req->out.hdr,HDR_COM,SMBlockingX); - SSVAL(req->out.hdr,HDR_TID,tcon->tid); - SSVAL(req->out.hdr,HDR_PID,0xFFFF); - SSVAL(req->out.hdr,HDR_UID,0); - SSVAL(req->out.hdr,HDR_MID,0xFFFF); - SCVAL(req->out.hdr,HDR_FLG,0); - SSVAL(req->out.hdr,HDR_FLG2,0); - - SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); - SSVAL(req->out.vwv, VWV(1), 0); - SSVAL(req->out.vwv, VWV(2), fnum); - SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE); - SCVAL(req->out.vwv, VWV(3)+1, level); - SIVAL(req->out.vwv, VWV(4), 0); - SSVAL(req->out.vwv, VWV(6), 0); - SSVAL(req->out.vwv, VWV(7), 0); - - req_send_reply(req); - return True; -} - -static void switch_message(int type, struct smbsrv_request *req); - -/**************************************************************************** -receive a SMB request header from the wire, forming a request_context -from the result -****************************************************************************/ -static NTSTATUS receive_smb_request(void *private, DATA_BLOB blob) -{ - struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection); - struct smbsrv_request *req; - uint8_t command; - - /* see if its a special NBT packet */ - if (CVAL(blob.data, 0) != 0) { - req = init_smb_request(smb_conn); - NT_STATUS_HAVE_NO_MEMORY(req); - - ZERO_STRUCT(req->in); - - req->in.buffer = talloc_steal(req, blob.data); - req->in.size = blob.length; - req->request_time = timeval_current(); - - reply_special(req); - return NT_STATUS_OK; - } - - if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) { - DEBUG(2,("Invalid SMB packet: length %d\n", blob.length)); - smbsrv_terminate_connection(smb_conn, "Invalid SMB packet"); - return NT_STATUS_OK; - } - - /* Make sure this is an SMB packet */ - if (IVAL(blob.data, NBT_HDR_SIZE) != SMB_MAGIC) { - DEBUG(2,("Non-SMB packet of length %d. Terminating connection\n", - blob.length)); - smbsrv_terminate_connection(smb_conn, "Non-SMB packet"); - return NT_STATUS_OK; - } - - req = init_smb_request(smb_conn); - NT_STATUS_HAVE_NO_MEMORY(req); - - req->in.buffer = talloc_steal(req, blob.data); - req->in.size = blob.length; - req->request_time = timeval_current(); - req->chained_fnum = -1; - req->in.allocated = req->in.size; - req->in.hdr = req->in.buffer + NBT_HDR_SIZE; - req->in.vwv = req->in.hdr + HDR_VWV; - req->in.wct = CVAL(req->in.hdr, HDR_WCT); - if (req->in.vwv + VWV(req->in.wct) <= req->in.buffer + req->in.size) { - req->in.data = req->in.vwv + VWV(req->in.wct) + 2; - req->in.data_size = SVAL(req->in.vwv, VWV(req->in.wct)); - - /* the bcc length is only 16 bits, but some packets - (such as SMBwriteX) can be much larger than 64k. We - detect this by looking for a large non-chained NBT - packet (at least 64k bigger than what is - specified). If it is detected then the NBT size is - used instead of the bcc size */ - if (req->in.data_size + 0x10000 <= - req->in.size - PTR_DIFF(req->in.data, req->in.buffer) && - (req->in.wct < 1 || SVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE)) { - /* its an oversized packet! fun for all the family */ - req->in.data_size = req->in.size - PTR_DIFF(req->in.data,req->in.buffer); - } - } - - if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct > req->in.size) { - DEBUG(2,("Invalid SMB word count %d\n", req->in.wct)); - smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); - return NT_STATUS_OK; - } - - if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct + req->in.data_size > req->in.size) { - DEBUG(2,("Invalid SMB buffer length count %d\n", req->in.data_size)); - smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); - return NT_STATUS_OK; - } - - req->flags = CVAL(req->in.hdr, HDR_FLG); - req->flags2 = SVAL(req->in.hdr, HDR_FLG2); - req->smbpid = SVAL(req->in.hdr, HDR_PID); - - if (!req_signing_check_incoming(req)) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return NT_STATUS_OK; - } - - command = CVAL(req->in.hdr, HDR_COM); - switch_message(command, req); - return NT_STATUS_OK; -} - -/* - These flags determine some of the permissions required to do an operation -*/ -#define AS_USER (1<<0) -#define SIGNING_NO_REPLY (1<<1) - -/* - define a list of possible SMB messages and their corresponding - functions. Any message that has a NULL function is unimplemented - - please feel free to contribute implementations! -*/ -static const struct smb_message_struct -{ - const char *name; - void (*fn)(struct smbsrv_request *); - int flags; -} - smb_messages[256] = { -/* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER}, -/* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER}, -/* 0x02 */ { "SMBopen",reply_open,AS_USER}, -/* 0x03 */ { "SMBcreate",reply_mknew,AS_USER}, -/* 0x04 */ { "SMBclose",reply_close,AS_USER}, -/* 0x05 */ { "SMBflush",reply_flush,AS_USER}, -/* 0x06 */ { "SMBunlink",reply_unlink,AS_USER}, -/* 0x07 */ { "SMBmv",reply_mv,AS_USER}, -/* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER}, -/* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER}, -/* 0x0a */ { "SMBread",reply_read,AS_USER}, -/* 0x0b */ { "SMBwrite",reply_write,AS_USER}, -/* 0x0c */ { "SMBlock",reply_lock,AS_USER}, -/* 0x0d */ { "SMBunlock",reply_unlock,AS_USER}, -/* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER }, -/* 0x0f */ { "SMBmknew",reply_mknew,AS_USER}, -/* 0x10 */ { "SMBchkpth",reply_chkpth,AS_USER}, -/* 0x11 */ { "SMBexit",reply_exit,0}, -/* 0x12 */ { "SMBlseek",reply_lseek,AS_USER}, -/* 0x13 */ { "SMBlockread",reply_lockread,AS_USER}, -/* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER}, -/* 0x15 */ { NULL, NULL, 0 }, -/* 0x16 */ { NULL, NULL, 0 }, -/* 0x17 */ { NULL, NULL, 0 }, -/* 0x18 */ { NULL, NULL, 0 }, -/* 0x19 */ { NULL, NULL, 0 }, -/* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER}, -/* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER}, -/* 0x1c */ { "SMBreadBs",NULL,0 }, -/* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER}, -/* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER}, -/* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER}, -/* 0x20 */ { "SMBwritec",NULL,0}, -/* 0x21 */ { NULL, NULL, 0 }, -/* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER}, -/* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER}, -/* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER}, -/* 0x25 */ { "SMBtrans",reply_trans,AS_USER}, -/* 0x26 */ { "SMBtranss",reply_transs,AS_USER}, -/* 0x27 */ { "SMBioctl",reply_ioctl,AS_USER}, -/* 0x28 */ { "SMBioctls",NULL,AS_USER}, -/* 0x29 */ { "SMBcopy",reply_copy,AS_USER}, -/* 0x2a */ { "SMBmove",NULL,AS_USER}, -/* 0x2b */ { "SMBecho",reply_echo,0}, -/* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER}, -/* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER}, -/* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER}, -/* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER}, -/* 0x30 */ { NULL, NULL, 0 }, -/* 0x31 */ { NULL, NULL, 0 }, -/* 0x32 */ { "SMBtrans2", reply_trans2, AS_USER}, -/* 0x33 */ { "SMBtranss2", reply_transs2, AS_USER}, -/* 0x34 */ { "SMBfindclose", reply_findclose,AS_USER}, -/* 0x35 */ { "SMBfindnclose", reply_findnclose, AS_USER}, -/* 0x36 */ { NULL, NULL, 0 }, -/* 0x37 */ { NULL, NULL, 0 }, -/* 0x38 */ { NULL, NULL, 0 }, -/* 0x39 */ { NULL, NULL, 0 }, -/* 0x3a */ { NULL, NULL, 0 }, -/* 0x3b */ { NULL, NULL, 0 }, -/* 0x3c */ { NULL, NULL, 0 }, -/* 0x3d */ { NULL, NULL, 0 }, -/* 0x3e */ { NULL, NULL, 0 }, -/* 0x3f */ { NULL, NULL, 0 }, -/* 0x40 */ { NULL, NULL, 0 }, -/* 0x41 */ { NULL, NULL, 0 }, -/* 0x42 */ { NULL, NULL, 0 }, -/* 0x43 */ { NULL, NULL, 0 }, -/* 0x44 */ { NULL, NULL, 0 }, -/* 0x45 */ { NULL, NULL, 0 }, -/* 0x46 */ { NULL, NULL, 0 }, -/* 0x47 */ { NULL, NULL, 0 }, -/* 0x48 */ { NULL, NULL, 0 }, -/* 0x49 */ { NULL, NULL, 0 }, -/* 0x4a */ { NULL, NULL, 0 }, -/* 0x4b */ { NULL, NULL, 0 }, -/* 0x4c */ { NULL, NULL, 0 }, -/* 0x4d */ { NULL, NULL, 0 }, -/* 0x4e */ { NULL, NULL, 0 }, -/* 0x4f */ { NULL, NULL, 0 }, -/* 0x50 */ { NULL, NULL, 0 }, -/* 0x51 */ { NULL, NULL, 0 }, -/* 0x52 */ { NULL, NULL, 0 }, -/* 0x53 */ { NULL, NULL, 0 }, -/* 0x54 */ { NULL, NULL, 0 }, -/* 0x55 */ { NULL, NULL, 0 }, -/* 0x56 */ { NULL, NULL, 0 }, -/* 0x57 */ { NULL, NULL, 0 }, -/* 0x58 */ { NULL, NULL, 0 }, -/* 0x59 */ { NULL, NULL, 0 }, -/* 0x5a */ { NULL, NULL, 0 }, -/* 0x5b */ { NULL, NULL, 0 }, -/* 0x5c */ { NULL, NULL, 0 }, -/* 0x5d */ { NULL, NULL, 0 }, -/* 0x5e */ { NULL, NULL, 0 }, -/* 0x5f */ { NULL, NULL, 0 }, -/* 0x60 */ { NULL, NULL, 0 }, -/* 0x61 */ { NULL, NULL, 0 }, -/* 0x62 */ { NULL, NULL, 0 }, -/* 0x63 */ { NULL, NULL, 0 }, -/* 0x64 */ { NULL, NULL, 0 }, -/* 0x65 */ { NULL, NULL, 0 }, -/* 0x66 */ { NULL, NULL, 0 }, -/* 0x67 */ { NULL, NULL, 0 }, -/* 0x68 */ { NULL, NULL, 0 }, -/* 0x69 */ { NULL, NULL, 0 }, -/* 0x6a */ { NULL, NULL, 0 }, -/* 0x6b */ { NULL, NULL, 0 }, -/* 0x6c */ { NULL, NULL, 0 }, -/* 0x6d */ { NULL, NULL, 0 }, -/* 0x6e */ { NULL, NULL, 0 }, -/* 0x6f */ { NULL, NULL, 0 }, -/* 0x70 */ { "SMBtcon",reply_tcon,0}, -/* 0x71 */ { "SMBtdis",reply_tdis,0}, -/* 0x72 */ { "SMBnegprot",reply_negprot,0}, -/* 0x73 */ { "SMBsesssetupX",reply_sesssetup,0}, -/* 0x74 */ { "SMBulogoffX", reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */ -/* 0x75 */ { "SMBtconX",reply_tcon_and_X,0}, -/* 0x76 */ { NULL, NULL, 0 }, -/* 0x77 */ { NULL, NULL, 0 }, -/* 0x78 */ { NULL, NULL, 0 }, -/* 0x79 */ { NULL, NULL, 0 }, -/* 0x7a */ { NULL, NULL, 0 }, -/* 0x7b */ { NULL, NULL, 0 }, -/* 0x7c */ { NULL, NULL, 0 }, -/* 0x7d */ { NULL, NULL, 0 }, -/* 0x7e */ { NULL, NULL, 0 }, -/* 0x7f */ { NULL, NULL, 0 }, -/* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER}, -/* 0x81 */ { "SMBsearch",reply_search,AS_USER}, -/* 0x82 */ { "SMBffirst",reply_search,AS_USER}, -/* 0x83 */ { "SMBfunique",reply_search,AS_USER}, -/* 0x84 */ { "SMBfclose",reply_fclose,AS_USER}, -/* 0x85 */ { NULL, NULL, 0 }, -/* 0x86 */ { NULL, NULL, 0 }, -/* 0x87 */ { NULL, NULL, 0 }, -/* 0x88 */ { NULL, NULL, 0 }, -/* 0x89 */ { NULL, NULL, 0 }, -/* 0x8a */ { NULL, NULL, 0 }, -/* 0x8b */ { NULL, NULL, 0 }, -/* 0x8c */ { NULL, NULL, 0 }, -/* 0x8d */ { NULL, NULL, 0 }, -/* 0x8e */ { NULL, NULL, 0 }, -/* 0x8f */ { NULL, NULL, 0 }, -/* 0x90 */ { NULL, NULL, 0 }, -/* 0x91 */ { NULL, NULL, 0 }, -/* 0x92 */ { NULL, NULL, 0 }, -/* 0x93 */ { NULL, NULL, 0 }, -/* 0x94 */ { NULL, NULL, 0 }, -/* 0x95 */ { NULL, NULL, 0 }, -/* 0x96 */ { NULL, NULL, 0 }, -/* 0x97 */ { NULL, NULL, 0 }, -/* 0x98 */ { NULL, NULL, 0 }, -/* 0x99 */ { NULL, NULL, 0 }, -/* 0x9a */ { NULL, NULL, 0 }, -/* 0x9b */ { NULL, NULL, 0 }, -/* 0x9c */ { NULL, NULL, 0 }, -/* 0x9d */ { NULL, NULL, 0 }, -/* 0x9e */ { NULL, NULL, 0 }, -/* 0x9f */ { NULL, NULL, 0 }, -/* 0xa0 */ { "SMBnttrans", reply_nttrans, AS_USER}, -/* 0xa1 */ { "SMBnttranss", reply_nttranss, AS_USER}, -/* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X, AS_USER}, -/* 0xa3 */ { NULL, NULL, 0 }, -/* 0xa4 */ { "SMBntcancel", reply_ntcancel, AS_USER|SIGNING_NO_REPLY}, -/* 0xa5 */ { "SMBntrename", reply_ntrename, AS_USER}, -/* 0xa6 */ { NULL, NULL, 0 }, -/* 0xa7 */ { NULL, NULL, 0 }, -/* 0xa8 */ { NULL, NULL, 0 }, -/* 0xa9 */ { NULL, NULL, 0 }, -/* 0xaa */ { NULL, NULL, 0 }, -/* 0xab */ { NULL, NULL, 0 }, -/* 0xac */ { NULL, NULL, 0 }, -/* 0xad */ { NULL, NULL, 0 }, -/* 0xae */ { NULL, NULL, 0 }, -/* 0xaf */ { NULL, NULL, 0 }, -/* 0xb0 */ { NULL, NULL, 0 }, -/* 0xb1 */ { NULL, NULL, 0 }, -/* 0xb2 */ { NULL, NULL, 0 }, -/* 0xb3 */ { NULL, NULL, 0 }, -/* 0xb4 */ { NULL, NULL, 0 }, -/* 0xb5 */ { NULL, NULL, 0 }, -/* 0xb6 */ { NULL, NULL, 0 }, -/* 0xb7 */ { NULL, NULL, 0 }, -/* 0xb8 */ { NULL, NULL, 0 }, -/* 0xb9 */ { NULL, NULL, 0 }, -/* 0xba */ { NULL, NULL, 0 }, -/* 0xbb */ { NULL, NULL, 0 }, -/* 0xbc */ { NULL, NULL, 0 }, -/* 0xbd */ { NULL, NULL, 0 }, -/* 0xbe */ { NULL, NULL, 0 }, -/* 0xbf */ { NULL, NULL, 0 }, -/* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER }, -/* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER}, -/* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER}, -/* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER}, -/* 0xc4 */ { NULL, NULL, 0 }, -/* 0xc5 */ { NULL, NULL, 0 }, -/* 0xc6 */ { NULL, NULL, 0 }, -/* 0xc7 */ { NULL, NULL, 0 }, -/* 0xc8 */ { NULL, NULL, 0 }, -/* 0xc9 */ { NULL, NULL, 0 }, -/* 0xca */ { NULL, NULL, 0 }, -/* 0xcb */ { NULL, NULL, 0 }, -/* 0xcc */ { NULL, NULL, 0 }, -/* 0xcd */ { NULL, NULL, 0 }, -/* 0xce */ { NULL, NULL, 0 }, -/* 0xcf */ { NULL, NULL, 0 }, -/* 0xd0 */ { "SMBsends",reply_sends,0}, -/* 0xd1 */ { "SMBsendb",NULL,0}, -/* 0xd2 */ { "SMBfwdname",NULL,0}, -/* 0xd3 */ { "SMBcancelf",NULL,0}, -/* 0xd4 */ { "SMBgetmac",NULL,0}, -/* 0xd5 */ { "SMBsendstrt",reply_sendstrt,0}, -/* 0xd6 */ { "SMBsendend",reply_sendend,0}, -/* 0xd7 */ { "SMBsendtxt",reply_sendtxt,0}, -/* 0xd8 */ { NULL, NULL, 0 }, -/* 0xd9 */ { NULL, NULL, 0 }, -/* 0xda */ { NULL, NULL, 0 }, -/* 0xdb */ { NULL, NULL, 0 }, -/* 0xdc */ { NULL, NULL, 0 }, -/* 0xdd */ { NULL, NULL, 0 }, -/* 0xde */ { NULL, NULL, 0 }, -/* 0xdf */ { NULL, NULL, 0 }, -/* 0xe0 */ { NULL, NULL, 0 }, -/* 0xe1 */ { NULL, NULL, 0 }, -/* 0xe2 */ { NULL, NULL, 0 }, -/* 0xe3 */ { NULL, NULL, 0 }, -/* 0xe4 */ { NULL, NULL, 0 }, -/* 0xe5 */ { NULL, NULL, 0 }, -/* 0xe6 */ { NULL, NULL, 0 }, -/* 0xe7 */ { NULL, NULL, 0 }, -/* 0xe8 */ { NULL, NULL, 0 }, -/* 0xe9 */ { NULL, NULL, 0 }, -/* 0xea */ { NULL, NULL, 0 }, -/* 0xeb */ { NULL, NULL, 0 }, -/* 0xec */ { NULL, NULL, 0 }, -/* 0xed */ { NULL, NULL, 0 }, -/* 0xee */ { NULL, NULL, 0 }, -/* 0xef */ { NULL, NULL, 0 }, -/* 0xf0 */ { NULL, NULL, 0 }, -/* 0xf1 */ { NULL, NULL, 0 }, -/* 0xf2 */ { NULL, NULL, 0 }, -/* 0xf3 */ { NULL, NULL, 0 }, -/* 0xf4 */ { NULL, NULL, 0 }, -/* 0xf5 */ { NULL, NULL, 0 }, -/* 0xf6 */ { NULL, NULL, 0 }, -/* 0xf7 */ { NULL, NULL, 0 }, -/* 0xf8 */ { NULL, NULL, 0 }, -/* 0xf9 */ { NULL, NULL, 0 }, -/* 0xfa */ { NULL, NULL, 0 }, -/* 0xfb */ { NULL, NULL, 0 }, -/* 0xfc */ { NULL, NULL, 0 }, -/* 0xfd */ { NULL, NULL, 0 }, -/* 0xfe */ { NULL, NULL, 0 }, -/* 0xff */ { NULL, NULL, 0 } -}; - -/**************************************************************************** -return a string containing the function name of a SMB command -****************************************************************************/ -static const char *smb_fn_name(uint8_t type) -{ - const char *unknown_name = "SMBunknown"; - - if (smb_messages[type].name == NULL) - return unknown_name; - - return smb_messages[type].name; -} - - -/**************************************************************************** - Do a switch on the message type and call the specific reply function for this -message. Unlike earlier versions of Samba the reply functions are responsible -for sending the reply themselves, rather than returning a size to this function -The reply functions may also choose to delay the processing by pushing the message -onto the message queue -****************************************************************************/ -static void switch_message(int type, struct smbsrv_request *req) -{ - int flags; - struct smbsrv_connection *smb_conn = req->smb_conn; - uint16_t session_tag; - NTSTATUS status; - - type &= 0xff; - - errno = 0; - - if (smb_messages[type].fn == NULL) { - DEBUG(0,("Unknown message type %d!\n",type)); - reply_unknown(req); - return; - } - - flags = smb_messages[type].flags; - - req->tcon = smbsrv_tcon_find(smb_conn, SVAL(req->in.hdr,HDR_TID)); - - if (req->session == NULL) { - /* setup the user context for this request if it - hasn't already been initialised (to cope with SMB - chaining) */ - - /* In share mode security we must ignore the vuid. */ - if (smb_conn->config.security == SEC_SHARE) { - session_tag = UID_FIELD_INVALID; - } else { - session_tag = SVAL(req->in.hdr,HDR_UID); - } - - req->session = smbsrv_session_find(req->smb_conn, session_tag); - if (req->session) { - req->session->vuid = session_tag; - } - } else { - session_tag = req->session->vuid; - } - - DEBUG(3,("switch message %s (task_id %d)\n",smb_fn_name(type), req->smb_conn->connection->server_id)); - - /* this must be called before we do any reply */ - if (flags & SIGNING_NO_REPLY) { - req_signing_no_reply(req); - } - - /* see if the vuid is valid */ - if ((flags & AS_USER) && !req->session) { - /* amazingly, the error code depends on the command */ - switch (type) { - case SMBntcreateX: - case SMBntcancel: - status = NT_STATUS_DOS(ERRSRV, ERRbaduid); - break; - default: - status = NT_STATUS_INVALID_HANDLE; - break; - } - /* - * TODO: - * don't know how to handle smb signing for this case - * so just skip the reply - */ - if ((flags & SIGNING_NO_REPLY) && - (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) { - DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n", - smb_fn_name(type), nt_errstr(status))); - req_destroy(req); - return; - } - req_reply_error(req, status); - return; - } - - /* does this protocol need a valid tree connection? */ - if ((flags & AS_USER) && !req->tcon) { - /* amazingly, the error code depends on the command */ - switch (type) { - case SMBntcreateX: - case SMBntcancel: - status = NT_STATUS_DOS(ERRSRV, ERRinvnid); - break; - default: - status = NT_STATUS_INVALID_HANDLE; - break; - } - /* - * TODO: - * don't know how to handle smb signing for this case - * so just skip the reply - */ - if ((flags & SIGNING_NO_REPLY) && - (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) { - DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n", - smb_fn_name(type), nt_errstr(status))); - req_destroy(req); - return; - } - req_reply_error(req, status); - return; - } - - smb_messages[type].fn(req); -} - -/* - we call this when first first part of a possibly chained request has been completed - and we need to call the 2nd part, if any -*/ -void chain_reply(struct smbsrv_request *req) -{ - uint16_t chain_cmd, chain_offset; - uint8_t *vwv, *data; - uint16_t wct; - uint16_t data_size; - - if (req->in.wct < 2 || req->out.wct < 2) { - req_reply_dos_error(req, ERRSRV, ERRerror); - return; - } - - chain_cmd = CVAL(req->in.vwv, VWV(0)); - chain_offset = SVAL(req->in.vwv, VWV(1)); - - if (chain_cmd == SMB_CHAIN_NONE) { - /* end of chain */ - SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); - SSVAL(req->out.vwv, VWV(1), 0); - req_send_reply(req); - return; - } - - if (chain_offset + req->in.hdr >= req->in.buffer + req->in.size) { - goto error; - } - - wct = CVAL(req->in.hdr, chain_offset); - vwv = req->in.hdr + chain_offset + 1; - - if (vwv + VWV(wct) + 2 > req->in.buffer + req->in.size) { - goto error; - } - - data_size = SVAL(vwv, VWV(wct)); - data = vwv + VWV(wct) + 2; - - if (data + data_size > req->in.buffer + req->in.size) { - goto error; - } - - /* all seems legit */ - req->in.vwv = vwv; - req->in.wct = wct; - req->in.data = data; - req->in.data_size = data_size; - req->in.ptr = data; - - req->chain_count++; - - SSVAL(req->out.vwv, VWV(0), chain_cmd); - SSVAL(req->out.vwv, VWV(1), req->out.size - NBT_HDR_SIZE); - - /* the current request in the chain might have used an async reply, - but that doesn't mean the next element needs to */ - ZERO_STRUCTP(req->async_states); - - switch_message(chain_cmd, req); - return; - -error: - SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); - SSVAL(req->out.vwv, VWV(1), 0); - req_reply_dos_error(req, ERRSRV, ERRerror); -} - - /* close the socket and shutdown a server_context */ @@ -715,7 +110,7 @@ static void smbsrv_accept(struct stream_connection *conn) } packet_set_private(smb_conn->packet, smb_conn); packet_set_socket(smb_conn->packet, conn->socket); - packet_set_callback(smb_conn->packet, receive_smb_request); + packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request); packet_set_full_request(smb_conn->packet, packet_full_request_nbt); packet_set_error_handler(smb_conn->packet, smbsrv_recv_error); packet_set_event_context(smb_conn->packet, conn->event.ctx); |