diff options
author | Stefan Metzmacher <metze@samba.org> | 2004-02-03 05:47:36 +0000 |
---|---|---|
committer | Stefan Metzmacher <metze@samba.org> | 2004-02-03 05:47:36 +0000 |
commit | 26ecaa32266e0c8699f280dd190811c310f2939c (patch) | |
tree | f33117f0ace3da6141e932f97cfcc51ef53233ab /source4/smbd/process.c | |
parent | b2f097ad38e3216946dcc45f749198d337fc117e (diff) | |
download | samba-26ecaa32266e0c8699f280dd190811c310f2939c.tar.gz samba-26ecaa32266e0c8699f280dd190811c310f2939c.tar.bz2 samba-26ecaa32266e0c8699f280dd190811c310f2939c.zip |
- move all SMB server stuff to smb_server/*
and create the SMB server subsystem
- remove unused XML and MYSQL configure tests
metze
(This used to be commit 956d212c83d8ebd8e31ec109f17dc2105ca72c30)
Diffstat (limited to 'source4/smbd/process.c')
-rw-r--r-- | source4/smbd/process.c | 748 |
1 files changed, 0 insertions, 748 deletions
diff --git a/source4/smbd/process.c b/source4/smbd/process.c index f3ca69ea32..38f76417f6 100644 --- a/source4/smbd/process.c +++ b/source4/smbd/process.c @@ -21,754 +21,6 @@ #include "includes.h" - -/* - send an oplock break request to a client -*/ -BOOL req_send_oplock_break(struct tcon_context *conn, uint16 fnum, uint8 level) -{ - struct request_context *req; - - req = init_smb_request(conn->smb); - - req_setup_reply(req, 8, 0); - - SCVAL(req->out.hdr,HDR_COM,SMBlockingX); - SSVAL(req->out.hdr,HDR_TID,conn->cnum); - 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); - SSVAL(req->out.vwv, VWV(3), 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; -} - -/**************************************************************************** -receive a SMB request from the wire, forming a request_context from the result -****************************************************************************/ -static struct request_context *receive_smb_request(struct server_context *smb) -{ - ssize_t len, len2; - char header[4]; - struct request_context *req; - - len = read_data(smb->socket.fd, header, 4); - if (len != 4) { - return NULL; - } - - len = smb_len(header); - - req = init_smb_request(smb); - - GetTimeOfDay(&req->request_time); - req->chained_fnum = -1; - - /* allocate the incoming buffer at the right size */ - req->in.buffer = talloc(req->mem_ctx, len + NBT_HDR_SIZE); - - /* fill in the already received header */ - memcpy(req->in.buffer, header, 4); - - len2 = read_data(smb->socket.fd, req->in.buffer + NBT_HDR_SIZE, len); - if (len2 != len) { - return NULL; - } - - /* fill in the rest of the req->in structure */ - req->in.size = len + NBT_HDR_SIZE; - 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); - } - } - - return req; -} - -/* - setup the user_ctx element of a request -*/ -static void setup_user_context(struct request_context *req) -{ - struct user_context *ctx; - - ctx = talloc(req->mem_ctx, sizeof(*ctx)); - ctx->vuid = SVAL(req->in.hdr, HDR_UID); - ctx->vuser = get_valid_user_struct(req->smb, ctx->vuid); - - req->user_ctx = ctx; -} - - -/* -These flags determine some of the permissions required to do an operation - -Note that I don't set NEED_WRITE on some write operations because they -are used by some brain-dead clients when printing, and I don't want to -force write permissions on print services. -*/ -#define AS_USER (1<<0) -#define NEED_WRITE (1<<1) -#define TIME_INIT (1<<2) -#define CAN_IPC (1<<3) -#define AS_GUEST (1<<5) -#define USE_MUTEX (1<<7) - -/* - 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 request_context *); - int flags; -} - smb_messages[256] = { -/* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE}, -/* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE}, -/* 0x02 */ { "SMBopen",reply_open,AS_USER }, -/* 0x03 */ { "SMBcreate",reply_mknew,AS_USER}, -/* 0x04 */ { "SMBclose",reply_close,AS_USER | CAN_IPC }, -/* 0x05 */ { "SMBflush",reply_flush,AS_USER}, -/* 0x06 */ { "SMBunlink",reply_unlink,AS_USER | NEED_WRITE }, -/* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE }, -/* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER}, -/* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER | NEED_WRITE}, -/* 0x0a */ { "SMBread",reply_read,AS_USER}, -/* 0x0b */ { "SMBwrite",reply_write,AS_USER | CAN_IPC }, -/* 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 | NEED_WRITE }, -/* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER }, -/* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER }, -/* 0x25 */ { "SMBtrans",reply_trans,AS_USER | CAN_IPC }, -/* 0x26 */ { "SMBtranss",NULL,AS_USER | CAN_IPC}, -/* 0x27 */ { "SMBioctl",reply_ioctl,0}, -/* 0x28 */ { "SMBioctls",NULL,AS_USER}, -/* 0x29 */ { "SMBcopy",reply_copy,AS_USER | NEED_WRITE }, -/* 0x2a */ { "SMBmove",NULL,AS_USER | NEED_WRITE }, -/* 0x2b */ { "SMBecho",reply_echo,0}, -/* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER}, -/* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC }, -/* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER | CAN_IPC }, -/* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC }, -/* 0x30 */ { NULL, NULL, 0 }, -/* 0x31 */ { NULL, NULL, 0 }, -/* 0x32 */ { "SMBtrans2", reply_trans2, AS_USER | CAN_IPC }, -/* 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,USE_MUTEX}, -/* 0x71 */ { "SMBtdis",reply_tdis,0}, -/* 0x72 */ { "SMBnegprot",reply_negprot,USE_MUTEX}, -/* 0x73 */ { "SMBsesssetupX",reply_sesssetup,USE_MUTEX}, -/* 0x74 */ { "SMBulogoffX", reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */ -/* 0x75 */ { "SMBtconX",reply_tcon_and_X,USE_MUTEX}, -/* 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 | CAN_IPC }, -/* 0xa1 */ { "SMBnttranss", reply_nttranss, AS_USER | CAN_IPC }, -/* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X, AS_USER | CAN_IPC }, -/* 0xa3 */ { NULL, NULL, 0 }, -/* 0xa4 */ { "SMBntcancel", reply_ntcancel, 0 }, -/* 0xa5 */ { "SMBntrename", reply_ntrename, 0 }, -/* 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,AS_GUEST}, -/* 0xd1 */ { "SMBsendb",NULL,AS_GUEST}, -/* 0xd2 */ { "SMBfwdname",NULL,AS_GUEST}, -/* 0xd3 */ { "SMBcancelf",NULL,AS_GUEST}, -/* 0xd4 */ { "SMBgetmac",NULL,AS_GUEST}, -/* 0xd5 */ { "SMBsendstrt",reply_sendstrt,AS_GUEST}, -/* 0xd6 */ { "SMBsendend",reply_sendend,AS_GUEST}, -/* 0xd7 */ { "SMBsendtxt",reply_sendtxt,AS_GUEST}, -/* 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 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 request_context *req) -{ - int flags; - uint16 session_tag; - struct server_context *smb = req->smb; - - 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; - - /* In share mode security we must ignore the vuid. */ - session_tag = (lp_security() == SEC_SHARE) ? - UID_FIELD_INVALID : - SVAL(req->in.hdr,HDR_UID); - - req->conn = conn_find(req->smb, SVAL(req->in.hdr,HDR_TID)); - - /* setup the user context for this request */ - setup_user_context(req); - - /* Ensure this value is replaced in the incoming packet. */ - SSVAL(req->in.hdr,HDR_UID,session_tag); - - if (req->user_ctx) { - req->user_ctx->vuid = session_tag; - } - DEBUG(3,("switch message %s (task_id %d)\n",smb_fn_name(type), smb->model_ops->get_id(req))); - - /* does this protocol need to be run as root? */ - if (!(flags & AS_USER)) { - change_to_root_user(); - } - - /* does this protocol need a valid tree connection? */ - if ((flags & AS_USER) && !req->conn) { - req_reply_error(req, NT_STATUS_NETWORK_NAME_DELETED); - return; - } - - /* does this protocol need to be run as the connected user? */ -#if HACK_REWRITE - if ((flags & AS_USER) && !change_to_user(req->conn,session_tag)) { - if (!(flags & AS_GUEST)) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return; - } - - /* we'll run it as guest */ - flags &= ~AS_USER; - } -#endif - - /* this code is to work around a bug is MS client 3 without - introducing a security hole - it needs to be able to do - print queue checks as guest if it isn't logged in properly */ - if (flags & AS_USER) { - flags &= ~AS_GUEST; - } - - /* does it need write permission? */ - if ((flags & NEED_WRITE) && !CAN_WRITE(req->conn)) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return; - } - - /* ipc services are limited */ - if (req->conn && req->conn->type == NTVFS_IPC && (flags & AS_USER) && !(flags & CAN_IPC)) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return; - } - - /* load service specific parameters */ - if (req->conn && !set_current_service(req->conn,(flags & AS_USER)?True:False)) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return; - } - - /* does this protocol need to be run as guest? */ -#if HACK_REWRITE - if ((flags & AS_GUEST) && - !change_to_guest()) { - req_reply_error(req, NT_STATUS_ACCESS_DENIED); - return; - } -#endif - /* THREAD TESTING: use mutex to serialize calls to critical functions with global state */ - if (flags & USE_MUTEX) { - MUTEX_LOCK_BY_ID(MUTEX_SMBD); - } - smb_messages[type].fn(req); - if (flags & USE_MUTEX) { - MUTEX_UNLOCK_BY_ID(MUTEX_SMBD); - } -} - - -/**************************************************************************** - Construct a reply to the incoming packet. -****************************************************************************/ -static void construct_reply(struct request_context *req) -{ - uint8 type = CVAL(req->in.hdr,HDR_COM); - - /* see if its a special NBT packet */ - if (CVAL(req->in.buffer,0) != 0) { - reply_special(req); - return; - } - - - /* Make sure this is an SMB packet */ - if (memcmp(req->in.hdr,"\377SMB",4) != 0) { - DEBUG(2,("Non-SMB packet of length %d. Terminating connection\n", - req->in.size)); - exit_server(req->smb, "Non-SMB packet"); - return; - } - - 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)); - exit_server(req->smb, "Invalid SMB packet"); - return; - } - - 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)); - exit_server(req->smb, "Invalid SMB packet"); - return; - } - - - req->smbpid = SVAL(req->in.hdr,HDR_PID); - req->flags = CVAL(req->in.hdr, HDR_FLG); - req->flags2 = SVAL(req->in.hdr, HDR_FLG2); - - switch_message(type, 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 request_context *req) -{ - uint16 chain_cmd, chain_offset; - char *vwv, *data; - uint16 wct; - uint16 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_STRUCT(req->async); - req->control_flags &= ~REQ_CONTROL_ASYNC; - - 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 -*/ -void server_terminate(struct server_context *smb) -{ - close(smb->socket.fd); - event_remove_fd_all(smb->events, smb->socket.fd); - - conn_close_all(smb); - - talloc_destroy(smb->mem_ctx); -} - - -/* - called when a SMB socket becomes readable -*/ -void smbd_read_handler(struct event_context *ev, struct fd_event *fde, - time_t t, uint16 flags) -{ - struct request_context *req; - struct server_context *smb = fde->private; - - req = receive_smb_request(smb); - if (!req) { - smb->model_ops->terminate_connection(smb, "receive error"); - return; - } - - construct_reply(req); - - /* free up temporary memory */ - lp_talloc_free(); -} - - -/* - process a message from an SMB socket while still processing a - previous message this is used by backends who need to ensure that - new messages from clients are still processed while they are - performing long operations -*/ -void smbd_process_async(struct server_context *smb) -{ - struct request_context *req; - - req = receive_smb_request(smb); - if (!req) { - smb->model_ops->terminate_connection(smb, "receive error"); - return; - } - - construct_reply(req); -} - - -/* - initialise a server_context from a open socket and register a event handler - for reading from that socket -*/ -void init_smbsession(struct event_context *ev, struct model_ops *model_ops, int fd, - void (*read_handler)(struct event_context *, struct fd_event *, time_t, uint16)) -{ - struct server_context *smb; - TALLOC_CTX *mem_ctx; - struct fd_event fde; - char *socket_addr; - - set_socket_options(fd,"SO_KEEPALIVE"); - set_socket_options(fd, lp_socket_options()); - - mem_ctx = talloc_init("server_context"); - - smb = (struct server_context *)talloc(mem_ctx, sizeof(*smb)); - if (!smb) return; - - ZERO_STRUCTP(smb); - - smb->mem_ctx = mem_ctx; - smb->socket.fd = fd; - smb->pid = getpid(); - - sub_set_context(&smb->substitute); - - /* set an initial client name based on its IP address. This will be replaced with - the netbios name later if it gives us one */ - socket_addr = get_socket_addr(smb->mem_ctx, fd); - sub_set_remote_machine(socket_addr); - smb->socket.client_addr = socket_addr; - - /* now initialise a few default values associated with this smb socket */ - smb->negotiate.max_send = 0xFFFF; - - /* this is the size that w2k uses, and it appears to be important for - good performance */ - smb->negotiate.max_recv = 4356; - - smb->users.next_vuid = VUID_OFFSET; - - smb->events = ev; - smb->model_ops = model_ops; - - conn_init(smb); - - /* setup a event handler for this socket. We are initially - only interested in reading from the socket */ - fde.fd = fd; - fde.handler = read_handler; - fde.private = smb; - fde.flags = EVENT_FD_READ; - - event_add_fd(ev, &fde); - - /* setup the DCERPC server subsystem */ - dcesrv_init_context(&smb->dcesrv); -} - - /* * initialize an smb process */ |