diff options
| -rw-r--r-- | source4/smb_server/smb/receive.c | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/source4/smb_server/smb/receive.c b/source4/smb_server/smb/receive.c index e3d247cbc0..b11682d158 100644 --- a/source4/smb_server/smb/receive.c +++ b/source4/smb_server/smb/receive.c @@ -65,105 +65,6 @@ NTSTATUS smbsrv_send_oplock_break(void *p, struct ntvfs_handle *ntvfs, uint8_t l 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; - struct timeval cur_time = timeval_current(); - uint8_t command; - - smb_conn->statistics.last_request_time = cur_time; - - /* see if its a special NBT packet */ - if (CVAL(blob.data, 0) != 0) { - req = smbsrv_init_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 = cur_time; - - smbsrv_reply_special(req); - return NT_STATUS_OK; - } - - if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) { - DEBUG(2,("Invalid SMB packet: length %ld\n", (long)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 %ld. Terminating connection\n", - (long)blob.length)); - smbsrv_terminate_connection(smb_conn, "Non-SMB packet"); - return NT_STATUS_OK; - } - - req = smbsrv_init_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 = cur_time; - 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", - (int)req->in.data_size)); - smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); - return NT_STATUS_OK; - } - - req->flags2 = SVAL(req->in.hdr, HDR_FLG2); - - /* fix the bufinfo */ - smbsrv_setup_bufinfo(req); - - if (!smbsrv_signing_check_incoming(req)) { - smbsrv_send_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 */ @@ -442,6 +343,105 @@ static const struct smb_message_struct }; /**************************************************************************** +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; + struct timeval cur_time = timeval_current(); + uint8_t command; + + smb_conn->statistics.last_request_time = cur_time; + + /* see if its a special NBT packet */ + if (CVAL(blob.data, 0) != 0) { + req = smbsrv_init_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 = cur_time; + + smbsrv_reply_special(req); + return NT_STATUS_OK; + } + + if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) { + DEBUG(2,("Invalid SMB packet: length %ld\n", (long)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 %ld. Terminating connection\n", + (long)blob.length)); + smbsrv_terminate_connection(smb_conn, "Non-SMB packet"); + return NT_STATUS_OK; + } + + req = smbsrv_init_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 = cur_time; + 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", + (int)req->in.data_size)); + smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet"); + return NT_STATUS_OK; + } + + req->flags2 = SVAL(req->in.hdr, HDR_FLG2); + + /* fix the bufinfo */ + smbsrv_setup_bufinfo(req); + + if (!smbsrv_signing_check_incoming(req)) { + smbsrv_send_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; +} + +/**************************************************************************** return a string containing the function name of a SMB command ****************************************************************************/ static const char *smb_fn_name(uint8_t type) |