/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
process incoming packets - main loop
Copyright (C) Andrew Tridgell 1992-1998
#include "includes.h"
-extern int DEBUGLEVEL;
+struct timeval smb_last_time;
-time_t smb_last_time=(time_t)0;
-
-char *InBuffer = NULL;
+static char *InBuffer = NULL;
char *OutBuffer = NULL;
char *last_inbuf = NULL;
extern int last_message;
extern int global_oplock_break;
-extern pstring sesssetup_user;
-extern char *last_inbuf;
-extern char *InBuffer;
-extern char *OutBuffer;
+extern userdom_struct current_user_info;
extern int smb_read_error;
-extern BOOL reload_after_sighup;
+SIG_ATOMIC_T reload_after_sighup = 0;
+SIG_ATOMIC_T got_sig_term = 0;
extern BOOL global_machine_password_needs_changing;
extern fstring global_myworkgroup;
extern pstring global_myname;
if(msg->msg_buf == NULL)
{
DEBUG(0,("push_message: malloc fail (2)\n"));
- free((char *)msg);
+ SAFE_FREE(msg);
return False;
}
BOOL push_oplock_pending_smb_message(char *buf, int msg_len)
{
- return push_message(&smb_oplock_queue, buf, msg_len);
+ return push_message(&smb_oplock_queue, buf, msg_len);
+}
+
+/****************************************************************************
+ Do all async processing in here. This includes UDB oplock messages, kernel
+ oplock messages, change notify events etc.
+****************************************************************************/
+
+static void async_processing(char *buffer, int buffer_len)
+{
+ DEBUG(10,("async_processing: Doing async processing.\n"));
+
+ /* check for oplock messages (both UDP and kernel) */
+ if (receive_local_message(buffer, buffer_len, 1)) {
+ process_local_message(buffer, buffer_len);
+ }
+
+ if (got_sig_term) {
+ exit_server("Caught TERM signal");
+ }
+
+ /* check for async change notify events */
+ process_pending_change_notify_queue(0);
+
+ /* check for sighup processing */
+ if (reload_after_sighup) {
+ change_to_root_user();
+ DEBUG(1,("Reloading services after SIGHUP\n"));
+ reload_services(False);
+ reload_after_sighup = 0;
+ }
}
/****************************************************************************
If a local udp message has been pushed onto the
queue (this can only happen during oplock break
- processing) return this first.
+ processing) call async_processing()
If a pending smb message has been pushed onto the
queue (this can only happen during oplock break
Returns False on timeout or error.
Else returns True.
-The timeout is in milli seconds
+The timeout is in milliseconds
****************************************************************************/
-static BOOL receive_message_or_smb(char *buffer, int buffer_len,
- int timeout, BOOL *got_smb)
+static BOOL receive_message_or_smb(char *buffer, int buffer_len, int timeout)
{
- extern int Client;
- fd_set fds;
- int selrtn;
- struct timeval to;
- int maxfd;
-
- smb_read_error = 0;
-
- *got_smb = False;
-
- /*
- * Check to see if we already have a message on the smb queue.
- * If so - copy and return it.
- */
+ fd_set fds;
+ int selrtn;
+ struct timeval to;
+ int maxfd;
+
+ smb_read_error = 0;
+
+ again:
+
+ /*
+ * Note that this call must be before processing any SMB
+ * messages as we need to synchronously process any messages
+ * we may have sent to ourselves from the previous SMB.
+ */
+ message_dispatch();
+
+ /*
+ * Check to see if we already have a message on the smb queue.
+ * If so - copy and return it.
+ */
+ if(ubi_slCount(&smb_oplock_queue) != 0) {
+ pending_message_list *msg = (pending_message_list *)ubi_slRemHead(&smb_oplock_queue);
+ memcpy(buffer, msg->msg_buf, MIN(buffer_len, msg->msg_len));
- if(ubi_slCount(&smb_oplock_queue) != 0)
- {
- pending_message_list *msg = (pending_message_list *)ubi_slRemHead(&smb_oplock_queue);
- memcpy(buffer, msg->msg_buf, MIN(buffer_len, msg->msg_len));
-
- /* Free the message we just copied. */
- free((char *)msg->msg_buf);
- free((char *)msg);
- *got_smb = True;
-
- DEBUG(5,("receive_message_or_smb: returning queued smb message.\n"));
- return True;
- }
-
- /*
- * Setup the select read fd set.
- */
-
- FD_ZERO(&fds);
- FD_SET(Client,&fds);
- maxfd = setup_oplock_select_set(&fds);
-
- to.tv_sec = timeout / 1000;
- to.tv_usec = (timeout % 1000) * 1000;
-
- selrtn = sys_select(MAX(maxfd,Client)+1,&fds,timeout>0?&to:NULL);
-
- /* Check if error */
- if(selrtn == -1) {
- /* something is wrong. Maybe the socket is dead? */
- smb_read_error = READ_ERROR;
- return False;
- }
+ /* Free the message we just copied. */
+ SAFE_FREE(msg->msg_buf);
+ SAFE_FREE(msg);
+
+ DEBUG(5,("receive_message_or_smb: returning queued smb message.\n"));
+ return True;
+ }
+
+
+ /*
+ * Setup the select read fd set.
+ */
+
+ FD_ZERO(&fds);
+
+ /*
+ * Ensure we process oplock break messages by preference.
+ * We have to do this before the select, after the select
+ * and if the select returns EINTR. This is due to the fact
+ * that the selects called from async_processing can eat an EINTR
+ * caused by a signal (we can't take the break message there).
+ * This is hideously complex - *MUST* be simplified for 3.0 ! JRA.
+ */
+
+ if (oplock_message_waiting(&fds)) {
+ DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n"));
+ async_processing(buffer, buffer_len);
+ /*
+ * After async processing we must go and do the select again, as
+ * the state of the flag in fds for the server file descriptor is
+ * indeterminate - we may have done I/O on it in the oplock processing. JRA.
+ */
+ goto again;
+ }
+
+ FD_SET(smbd_server_fd(),&fds);
+ maxfd = setup_oplock_select_set(&fds);
+
+ to.tv_sec = timeout / 1000;
+ to.tv_usec = (timeout % 1000) * 1000;
+
+ selrtn = sys_select(MAX(maxfd,smbd_server_fd())+1,&fds,NULL,NULL,timeout>0?&to:NULL);
+
+ /* if we get EINTR then maybe we have received an oplock
+ signal - treat this as select returning 1. This is ugly, but
+ is the best we can do until the oplock code knows more about
+ signals */
+ if (selrtn == -1 && errno == EINTR) {
+ async_processing(buffer, buffer_len);
+ /*
+ * After async processing we must go and do the select again, as
+ * the state of the flag in fds for the server file descriptor is
+ * indeterminate - we may have done I/O on it in the oplock processing. JRA.
+ */
+ goto again;
+ }
+
+ /* Check if error */
+ if (selrtn == -1) {
+ /* something is wrong. Maybe the socket is dead? */
+ smb_read_error = READ_ERROR;
+ return False;
+ }
- /* Did we timeout ? */
- if (selrtn == 0) {
- smb_read_error = READ_TIMEOUT;
- return False;
- }
-
- if (FD_ISSET(Client,&fds))
- {
- *got_smb = True;
- return receive_smb(Client, buffer, 0);
- }
- else
- {
- return receive_local_message(&fds, buffer, buffer_len, 0);
- }
+ /* Did we timeout ? */
+ if (selrtn == 0) {
+ smb_read_error = READ_TIMEOUT;
+ return False;
+ }
+
+ /*
+ * Ensure we process oplock break messages by preference.
+ * This is IMPORTANT ! Otherwise we can starve other processes
+ * sending us an oplock break message. JRA.
+ */
+
+ if (oplock_message_waiting(&fds)) {
+ async_processing(buffer, buffer_len);
+ /*
+ * After async processing we must go and do the select again, as
+ * the state of the flag in fds for the server file descriptor is
+ * indeterminate - we may have done I/O on it in the oplock processing. JRA.
+ */
+ goto again;
+ }
+
+ return receive_smb(smbd_server_fd(), buffer, 0);
}
/****************************************************************************
BOOL receive_next_smb(char *inbuf, int bufsize, int timeout)
{
- BOOL got_smb = False;
- BOOL ret;
+ BOOL got_keepalive;
+ BOOL ret;
- do
- {
- ret = receive_message_or_smb(inbuf,bufsize,timeout,&got_smb);
+ do {
+ ret = receive_message_or_smb(inbuf,bufsize,timeout);
+
+ got_keepalive = (ret && (CVAL(inbuf,0) == SMBkeepalive));
+ } while (ret && got_keepalive);
- if(ret && !got_smb)
- {
- /* Deal with oplock break requests from other smbd's. */
- process_local_message(inbuf, bufsize);
- continue;
- }
+ return ret;
+}
- if(ret && (CVAL(inbuf,0) == 0x85))
- {
- /* Keepalive packet. */
- got_smb = False;
- }
+/****************************************************************************
+ We're terminating and have closed all our files/connections etc.
+ If there are any pending local messages we need to respond to them
+ before termination so that other smbds don't think we just died whilst
+ holding oplocks.
+****************************************************************************/
+
+void respond_to_all_remaining_local_messages(void)
+{
+ char buffer[1024];
+ /*
+ * Assert we have no exclusive open oplocks.
+ */
+
+ if(get_number_of_exclusive_open_oplocks()) {
+ DEBUG(0,("respond_to_all_remaining_local_messages: PANIC : we have %d exclusive oplocks.\n",
+ get_number_of_exclusive_open_oplocks() ));
+ return;
+ }
+
+ /*
+ * Keep doing receive_local_message with a 1 ms timeout until
+ * we have no more messages.
+ */
+ while(receive_local_message(buffer, sizeof(buffer), 1)) {
+ /* Deal with oplock break requests from other smbd's. */
+ process_local_message(buffer, sizeof(buffer));
}
- while(ret && !got_smb);
- return ret;
+ return;
}
functions. Any message that has a NULL function is unimplemented -
please feel free to contribute implementations!
*/
-struct smb_message_struct
+const static struct smb_message_struct
{
- int code;
- char *name;
+ const char *name;
int (*fn)(connection_struct *conn, char *, char *, int, int);
int flags;
}
- smb_messages[] = {
-
- /* CORE PROTOCOL */
-
- {SMBnegprot,"SMBnegprot",reply_negprot,0},
- {SMBtcon,"SMBtcon",reply_tcon,0},
- {SMBtdis,"SMBtdis",reply_tdis,0},
- {SMBexit,"SMBexit",reply_exit,0},
- {SMBioctl,"SMBioctl",reply_ioctl,0},
- {SMBecho,"SMBecho",reply_echo,0},
- {SMBsesssetupX,"SMBsesssetupX",reply_sesssetup_and_X,0},
- {SMBtconX,"SMBtconX",reply_tcon_and_X,0},
- {SMBulogoffX, "SMBulogoffX", reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */
- {SMBgetatr,"SMBgetatr",reply_getatr,AS_USER},
- {SMBsetatr,"SMBsetatr",reply_setatr,AS_USER | NEED_WRITE},
- {SMBchkpth,"SMBchkpth",reply_chkpth,AS_USER},
- {SMBsearch,"SMBsearch",reply_search,AS_USER},
- {SMBopen,"SMBopen",reply_open,AS_USER | QUEUE_IN_OPLOCK },
-
- /* note that SMBmknew and SMBcreate are deliberately overloaded */
- {SMBcreate,"SMBcreate",reply_mknew,AS_USER},
- {SMBmknew,"SMBmknew",reply_mknew,AS_USER},
-
- {SMBunlink,"SMBunlink",reply_unlink,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK},
- {SMBread,"SMBread",reply_read,AS_USER},
- {SMBwrite,"SMBwrite",reply_write,AS_USER},
- {SMBclose,"SMBclose",reply_close,AS_USER | CAN_IPC},
- {SMBmkdir,"SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE},
- {SMBrmdir,"SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE},
- {SMBdskattr,"SMBdskattr",reply_dskattr,AS_USER},
- {SMBmv,"SMBmv",reply_mv,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK},
-
- /* this is a Pathworks specific call, allowing the
- changing of the root path */
- {pSETDIR,"pSETDIR",reply_setdir,AS_USER},
-
- {SMBlseek,"SMBlseek",reply_lseek,AS_USER},
- {SMBflush,"SMBflush",reply_flush,AS_USER},
- {SMBctemp,"SMBctemp",reply_ctemp,AS_USER | QUEUE_IN_OPLOCK },
- {SMBsplopen,"SMBsplopen",reply_printopen,AS_USER | QUEUE_IN_OPLOCK },
- {SMBsplclose,"SMBsplclose",reply_printclose,AS_USER},
- {SMBsplretq,"SMBsplretq",reply_printqueue,AS_USER},
- {SMBsplwr,"SMBsplwr",reply_printwrite,AS_USER},
- {SMBlock,"SMBlock",reply_lock,AS_USER},
- {SMBunlock,"SMBunlock",reply_unlock,AS_USER},
-
- /* CORE+ PROTOCOL FOLLOWS */
-
- {SMBreadbraw,"SMBreadbraw",reply_readbraw,AS_USER},
- {SMBwritebraw,"SMBwritebraw",reply_writebraw,AS_USER},
- {SMBwriteclose,"SMBwriteclose",reply_writeclose,AS_USER},
- {SMBlockread,"SMBlockread",reply_lockread,AS_USER},
- {SMBwriteunlock,"SMBwriteunlock",reply_writeunlock,AS_USER},
-
- /* LANMAN1.0 PROTOCOL FOLLOWS */
-
- {SMBreadBmpx,"SMBreadBmpx",reply_readbmpx,AS_USER},
- {SMBreadBs,"SMBreadBs",NULL,AS_USER},
- {SMBwriteBmpx,"SMBwriteBmpx",reply_writebmpx,AS_USER},
- {SMBwriteBs,"SMBwriteBs",reply_writebs,AS_USER},
- {SMBwritec,"SMBwritec",NULL,AS_USER},
- {SMBsetattrE,"SMBsetattrE",reply_setattrE,AS_USER | NEED_WRITE},
- {SMBgetattrE,"SMBgetattrE",reply_getattrE,AS_USER},
- {SMBtrans,"SMBtrans",reply_trans,AS_USER | CAN_IPC},
- {SMBtranss,"SMBtranss",NULL,AS_USER | CAN_IPC},
- {SMBioctls,"SMBioctls",NULL,AS_USER},
- {SMBcopy,"SMBcopy",reply_copy,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK },
- {SMBmove,"SMBmove",NULL,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK },
-
- {SMBopenX,"SMBopenX",reply_open_and_X,AS_USER | CAN_IPC | QUEUE_IN_OPLOCK },
- {SMBreadX,"SMBreadX",reply_read_and_X,AS_USER | CAN_IPC },
- {SMBwriteX,"SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC },
- {SMBlockingX,"SMBlockingX",reply_lockingX,AS_USER},
-
- {SMBffirst,"SMBffirst",reply_search,AS_USER},
- {SMBfunique,"SMBfunique",reply_search,AS_USER},
- {SMBfclose,"SMBfclose",reply_fclose,AS_USER},
-
- /* LANMAN2.0 PROTOCOL FOLLOWS */
- {SMBfindnclose, "SMBfindnclose", reply_findnclose, AS_USER},
- {SMBfindclose, "SMBfindclose", reply_findclose,AS_USER},
- {SMBtrans2, "SMBtrans2", reply_trans2, AS_USER },
- {SMBtranss2, "SMBtranss2", reply_transs2, AS_USER},
-
- /* NT PROTOCOL FOLLOWS */
- {SMBntcreateX, "SMBntcreateX", reply_ntcreate_and_X, AS_USER | CAN_IPC | QUEUE_IN_OPLOCK },
- {SMBnttrans, "SMBnttrans", reply_nttrans, AS_USER | CAN_IPC },
- {SMBnttranss, "SMBnttranss", reply_nttranss, AS_USER | CAN_IPC },
- {SMBntcancel, "SMBntcancel", reply_ntcancel, AS_USER },
-
- /* messaging routines */
- {SMBsends,"SMBsends",reply_sends,AS_GUEST},
- {SMBsendstrt,"SMBsendstrt",reply_sendstrt,AS_GUEST},
- {SMBsendend,"SMBsendend",reply_sendend,AS_GUEST},
- {SMBsendtxt,"SMBsendtxt",reply_sendtxt,AS_GUEST},
-
- /* NON-IMPLEMENTED PARTS OF THE CORE PROTOCOL */
-
- {SMBsendb,"SMBsendb",NULL,AS_GUEST},
- {SMBfwdname,"SMBfwdname",NULL,AS_GUEST},
- {SMBcancelf,"SMBcancelf",NULL,AS_GUEST},
- {SMBgetmac,"SMBgetmac",NULL,AS_GUEST}
- };
+ 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 | QUEUE_IN_OPLOCK },
+/* 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 | QUEUE_IN_OPLOCK},
+/* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK},
+/* 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 | QUEUE_IN_OPLOCK },
+/* 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 | QUEUE_IN_OPLOCK },
+/* 0x2a */ { "SMBmove",NULL,AS_USER | NEED_WRITE | QUEUE_IN_OPLOCK },
+/* 0x2b */ { "SMBecho",reply_echo,0},
+/* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER},
+/* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC | QUEUE_IN_OPLOCK },
+/* 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,0},
+/* 0x71 */ { "SMBtdis",reply_tdis,0},
+/* 0x72 */ { "SMBnegprot",reply_negprot,0},
+/* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X,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 | CAN_IPC | QUEUE_IN_OPLOCK},
+/* 0xa1 */ { "SMBnttranss", reply_nttranss, AS_USER | CAN_IPC },
+/* 0xa2 */ { "SMBntcreateX", reply_ntcreate_and_X, AS_USER | CAN_IPC | QUEUE_IN_OPLOCK },
+/* 0xa3 */ { NULL, NULL, 0 },
+/* 0xa4 */ { "SMBntcancel", reply_ntcancel, 0 },
+/* 0xa5 */ { NULL, NULL, 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 | QUEUE_IN_OPLOCK },
+/* 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 }
+
+};
+
+/*******************************************************************
+dump a prs to a file
+ ********************************************************************/
+static void smb_dump(const char *name, int type, char *data, ssize_t len)
+{
+ int fd, i;
+ pstring fname;
+ if (DEBUGLEVEL < 50) return;
+
+ if (len < 4) len = smb_len(data)+4;
+ for (i=1;i<100;i++) {
+ slprintf(fname,sizeof(fname)-1, "/tmp/%s.%d.%s", name, i,
+ type ? "req" : "resp");
+ fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
+ if (fd != -1 || errno != EEXIST) break;
+ }
+ if (fd != -1) {
+ ssize_t ret = write(fd, data, len);
+ if (ret != len)
+ DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret ));
+ close(fd);
+ DEBUG(0,("created %s len %d\n", fname, len));
+ }
+}
/****************************************************************************
****************************************************************************/
static int switch_message(int type,char *inbuf,char *outbuf,int size,int bufsize)
{
- static int pid= -1;
+ static pid_t pid= (pid_t)-1;
int outsize = 0;
- static int num_smb_messages =
- sizeof(smb_messages) / sizeof(struct smb_message_struct);
- int match;
- extern int Client;
+ extern uint16 global_smbpid;
- if (pid == -1)
- pid = getpid();
+ type &= 0xff;
+
+ if (pid == (pid_t)-1)
+ pid = sys_getpid();
errno = 0;
last_message = type;
return(-1);
}
- for (match=0;match<num_smb_messages;match++)
- if (smb_messages[match].code == type)
- break;
+ /* yuck! this is an interim measure before we get rid of our
+ current inbuf/outbuf system */
+ global_smbpid = SVAL(inbuf,smb_pid);
- if (match == num_smb_messages)
+ if (smb_messages[type].fn == NULL)
{
DEBUG(0,("Unknown message type %d!\n",type));
+ smb_dump("Unknown", 1, inbuf, size);
outsize = reply_unknown(inbuf,outbuf);
}
else
{
- DEBUG(3,("switch message %s (pid %d)\n",smb_messages[match].name,pid));
+ int flags = smb_messages[type].flags;
+ static uint16 last_session_tag = UID_FIELD_INVALID;
+ /* In share mode security we must ignore the vuid. */
+ uint16 session_tag = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(inbuf,smb_uid);
+ connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
+
+ DEBUG(3,("switch message %s (pid %d)\n",smb_fn_name(type),(int)pid));
- if(global_oplock_break && (smb_messages[match].flags & QUEUE_IN_OPLOCK))
+ smb_dump(smb_fn_name(type), 1, inbuf, size);
+ if(global_oplock_break)
{
- /*
- * Queue this message as we are the process of an oplock break.
- */
+ if(flags & QUEUE_IN_OPLOCK)
+ {
+ /*
+ * Queue this message as we are the process of an oplock break.
+ */
- DEBUG( 2, ( "switch_message: queueing message due to being in " ) );
- DEBUGADD( 2, ( "oplock break state.\n" ) );
+ DEBUG( 2, ( "switch_message: queueing message due to being in " ) );
+ DEBUGADD( 2, ( "oplock break state.\n" ) );
- push_oplock_pending_smb_message( inbuf, size );
- return -1;
- }
+ push_oplock_pending_smb_message( inbuf, size );
+ return -1;
+ }
+ }
- if (smb_messages[match].fn)
- {
- int flags = smb_messages[match].flags;
- static uint16 last_session_tag = UID_FIELD_INVALID;
- /* In share mode security we must ignore the vuid. */
- uint16 session_tag = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(inbuf,smb_uid);
- connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
-
-
- /* Ensure this value is replaced in the incoming packet. */
- SSVAL(inbuf,smb_uid,session_tag);
-
- /*
- * Ensure the correct username is in sesssetup_user.
- * This is a really ugly bugfix for problems with
- * multiple session_setup_and_X's being done and
- * allowing %U and %G substitutions to work correctly.
- * There is a reason this code is done here, don't
- * move it unless you know what you're doing... :-).
- * JRA.
- */
- if (session_tag != last_session_tag) {
- user_struct *vuser = NULL;
-
- last_session_tag = session_tag;
- if(session_tag != UID_FIELD_INVALID)
- vuser = get_valid_user_struct(session_tag);
- if(vuser != NULL)
- pstrcpy( sesssetup_user, vuser->requested_name);
- }
-
- /* does this protocol need to be run as root? */
- if (!(flags & AS_USER))
- unbecome_user();
-
- /* does this protocol need to be run as the connected user? */
- if ((flags & AS_USER) && !become_user(conn,session_tag)) {
- if (flags & AS_GUEST)
- flags &= ~AS_USER;
- else
- return(ERROR(ERRSRV,ERRinvnid));
- }
- /* 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(conn))
- return(ERROR(ERRSRV,ERRaccess));
-
- /* ipc services are limited */
- if (IS_IPC(conn) && (flags & AS_USER) && !(flags & CAN_IPC)) {
- return(ERROR(ERRSRV,ERRaccess));
- }
-
- /* load service specific parameters */
- if (conn &&
- !become_service(conn,(flags & AS_USER)?True:False)) {
- return(ERROR(ERRSRV,ERRaccess));
- }
-
- /* does this protocol need to be run as guest? */
- if ((flags & AS_GUEST) &&
- (!become_guest() ||
- !check_access(Client, lp_hostsallow(-1), lp_hostsdeny(-1)))) {
- return(ERROR(ERRSRV,ERRaccess));
- }
-
- last_inbuf = inbuf;
-
- outsize = smb_messages[match].fn(conn, inbuf,outbuf,size,bufsize);
+ /* Ensure this value is replaced in the incoming packet. */
+ SSVAL(inbuf,smb_uid,session_tag);
+
+ /*
+ * Ensure the correct username is in current_user_info.
+ * This is a really ugly bugfix for problems with
+ * multiple session_setup_and_X's being done and
+ * allowing %U and %G substitutions to work correctly.
+ * There is a reason this code is done here, don't
+ * move it unless you know what you're doing... :-).
+ * JRA.
+ */
+
+ if (session_tag != last_session_tag) {
+ user_struct *vuser = NULL;
+
+ last_session_tag = session_tag;
+ if(session_tag != UID_FIELD_INVALID)
+ vuser = get_valid_user_struct(session_tag);
+ if(vuser != NULL)
+ current_user_info = vuser->user;
}
- else
- {
- outsize = reply_unknown(inbuf,outbuf);
+
+ /* 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) && !conn) {
+ return ERROR_DOS(ERRSRV, ERRinvnid);
+ }
+
+
+ /* does this protocol need to be run as the connected user? */
+ if ((flags & AS_USER) && !change_to_user(conn,session_tag)) {
+ if (flags & AS_GUEST)
+ flags &= ~AS_USER;
+ else
+ return(ERROR_DOS(ERRSRV,ERRaccess));
+ }
+
+ /* 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(conn))
+ return(ERROR_DOS(ERRSRV,ERRaccess));
+
+ /* ipc services are limited */
+ if (IS_IPC(conn) && (flags & AS_USER) && !(flags & CAN_IPC)) {
+ return(ERROR_DOS(ERRSRV,ERRaccess));
+ }
+
+ /* load service specific parameters */
+ if (conn && !set_current_service(conn,(flags & AS_USER)?True:False)) {
+ return(ERROR_DOS(ERRSRV,ERRaccess));
}
+
+ /* does this protocol need to be run as guest? */
+ if ((flags & AS_GUEST) &&
+ (!change_to_guest() ||
+ !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1)))) {
+ return(ERROR_DOS(ERRSRV,ERRaccess));
+ }
+
+ last_inbuf = inbuf;
+
+ outsize = smb_messages[type].fn(conn, inbuf,outbuf,size,bufsize);
}
+ smb_dump(smb_fn_name(type), 0, outbuf, outsize);
+
return(outsize);
}
int type = CVAL(inbuf,smb_com);
int outsize = 0;
int msg_type = CVAL(inbuf,0);
- extern int chain_size;
- smb_last_time = time(NULL);
+ GetTimeOfDay(&smb_last_time);
chain_size = 0;
file_chain_reset();
return(outsize);
}
+/****************************************************************************
+ Keep track of the number of running smbd's. This functionality is used to
+ 'hard' limit Samba overhead on resource constrained systems.
+****************************************************************************/
+static BOOL smbd_process_limit(void)
+{
+ int32 total_smbds;
+
+ if (lp_max_smbd_processes()) {
+
+ /* Always add one to the smbd process count, as exit_server() always
+ * subtracts one.
+ */
+
+ total_smbds = 1; /* In case we need to create the entry. */
+
+ if (!conn_tdb_ctx()) {
+ DEBUG(0,("smbd_process_limit: max smbd processes parameter set with status parameter not \
+set. Ignoring max smbd restriction.\n"));
+ return False;
+ }
+
+ if (tdb_change_int32_atomic(conn_tdb_ctx(), "INFO/total_smbds", &total_smbds, 1) == -1)
+ return True;
+
+ return total_smbds > lp_max_smbd_processes();
+ }
+ else
+ return False;
+}
/****************************************************************************
- process an smb from the client - split out from the process() code so
+ process an smb from the client - split out from the smbd_process() code so
it can be used by the oplock break code.
****************************************************************************/
void process_smb(char *inbuf, char *outbuf)
{
- extern int Client;
-#ifdef WITH_SSL
- extern BOOL sslEnabled; /* don't use function for performance reasons */
- static int sslConnected = 0;
-#endif /* WITH_SSL */
static int trans_num;
int msg_type = CVAL(inbuf,0);
int32 len = smb_len(inbuf);
int nread = len + 4;
+ DO_PROFILE_INC(smb_count);
+
if (trans_num == 0) {
/* on the first packet, check the global hosts allow/ hosts
deny parameters before doing any parsing of the packet
passed to us by the client. This prevents attacks on our
parsing code from hosts not in the hosts allow list */
- if (!check_access(Client, lp_hostsallow(-1), lp_hostsdeny(-1))) {
- /* send a negative session response "not listining on calling
+ if (smbd_process_limit() ||
+ !check_access(smbd_server_fd(), lp_hostsallow(-1), lp_hostsdeny(-1))) {
+ /* send a negative session response "not listening on calling
name" */
static unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
DEBUG( 1, ( "Connection denied from %s\n",
- client_addr(Client) ) );
- send_smb(Client,(char *)buf);
+ client_addr() ) );
+ (void)send_smb(smbd_server_fd(),(char *)buf);
exit_server("connection denied");
}
}
DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, len ) );
DEBUG( 3, ( "Transaction %d of length %d\n", trans_num, nread ) );
-#ifdef WITH_SSL
- if(sslEnabled && !sslConnected){
- sslConnected = sslutil_negotiate_ssl(Client, msg_type);
- if(sslConnected < 0){ /* an error occured */
- exit_server("SSL negotiation failed");
- }else if(sslConnected){
- trans_num++;
- return;
- }
- }
-#endif /* WITH_SSL */
-
-#ifdef WITH_VTP
- if(trans_num == 1 && VT_Check(inbuf))
- {
- VT_Process();
- return;
- }
-#endif
-
if (msg_type == 0)
show_msg(inbuf);
- else if(msg_type == 0x85)
+ else if(msg_type == SMBkeepalive)
return; /* Keepalive packet. */
nread = construct_reply(inbuf,outbuf,nread,max_send);
nread, smb_len(outbuf)));
}
else
- send_smb(Client,outbuf);
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("process_smb: send_smb failed.");
}
trans_num++;
}
/****************************************************************************
return a string containing the function name of a SMB command
****************************************************************************/
-char *smb_fn_name(int type)
+const char *smb_fn_name(int type)
{
static char *unknown_name = "SMBunknown";
- static int num_smb_messages =
- sizeof(smb_messages) / sizeof(struct smb_message_struct);
- int match;
-
- for (match=0;match<num_smb_messages;match++)
- if (smb_messages[match].code == type)
- break;
- if (match == num_smb_messages)
+ if (smb_messages[type].name == NULL)
return(unknown_name);
- return(smb_messages[match].name);
+ return(smb_messages[type].name);
}
void construct_reply_common(char *inbuf,char *outbuf)
{
- bzero(outbuf,smb_size);
-
- set_message(outbuf,0,0,True);
- CVAL(outbuf,smb_com) = CVAL(inbuf,smb_com);
-
- memcpy(outbuf+4,inbuf+4,4);
- CVAL(outbuf,smb_rcls) = SMB_SUCCESS;
- CVAL(outbuf,smb_reh) = 0;
- SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES)); /* bit 7 set
- means a reply */
- SSVAL(outbuf,smb_flg2,FLAGS2_LONG_PATH_COMPONENTS); /* say we support long filenames */
- SSVAL(outbuf,smb_err,SMB_SUCCESS);
- SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
- SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
- SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
- SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
+ memset(outbuf,'\0',smb_size);
+
+ set_message(outbuf,0,0,True);
+ SCVAL(outbuf,smb_com,CVAL(inbuf,smb_com));
+
+ memcpy(outbuf+4,inbuf+4,4);
+ SCVAL(outbuf,smb_rcls,SMB_SUCCESS);
+ SCVAL(outbuf,smb_reh,0);
+ SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES));
+ SSVAL(outbuf,smb_flg2,
+ (SVAL(inbuf,smb_flg2) & FLAGS2_UNICODE_STRINGS) |
+ FLAGS2_LONG_PATH_COMPONENTS |
+ FLAGS2_32_BIT_ERROR_CODES | FLAGS2_EXTENDED_SECURITY);
+
+ SSVAL(outbuf,smb_err,SMB_SUCCESS);
+ SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
+ SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
+ SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
+ SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
}
/****************************************************************************
int outsize2;
char inbuf_saved[smb_wct];
char outbuf_saved[smb_wct];
- extern int chain_size;
int wct = CVAL(outbuf,smb_wct);
int outsize = smb_size + 2*wct + SVAL(outbuf,smb_vwv0+2*wct);
/* maybe its not chained */
if (smb_com2 == 0xFF) {
- CVAL(outbuf,smb_vwv0) = 0xFF;
+ SCVAL(outbuf,smb_vwv0,0xFF);
return outsize;
}
orig_outbuf = outbuf;
}
+ /*
+ * The original Win95 redirector dies on a reply to
+ * a lockingX and read chain unless the chain reply is
+ * 4 byte aligned. JRA.
+ */
+
+ outsize = (outsize + 3) & ~3;
+
/* we need to tell the client where the next part of the reply will be */
SSVAL(outbuf,smb_vwv1,smb_offset(outbuf+outsize,outbuf));
- CVAL(outbuf,smb_vwv0) = smb_com2;
+ SCVAL(outbuf,smb_vwv0,smb_com2);
/* remember how much the caller added to the chain, only counting stuff
after the parameter words */
memmove(inbuf2,inbuf,smb_wct);
/* create the in buffer */
- CVAL(inbuf2,smb_com) = smb_com2;
+ SCVAL(inbuf2,smb_com,smb_com2);
/* create the out buffer */
construct_reply_common(inbuf2, outbuf2);
/* copy the new reply and request headers over the old ones, but
preserve the smb_com field */
memmove(orig_outbuf,outbuf2,smb_wct);
- CVAL(orig_outbuf,smb_com) = smb_com1;
+ SCVAL(orig_outbuf,smb_com,smb_com1);
/* restore the saved data, being careful not to overwrite any
data from the reply header */
}
/****************************************************************************
- process commands from the client
+ Setup the needed select timeout.
****************************************************************************/
-void smbd_process(void)
+
+static int setup_select_timeout(void)
{
- extern int Client;
+ int select_timeout;
+ int t;
- InBuffer = (char *)malloc(BUFFER_SIZE + SAFETY_MARGIN);
- OutBuffer = (char *)malloc(BUFFER_SIZE + SAFETY_MARGIN);
- if ((InBuffer == NULL) || (OutBuffer == NULL))
- return;
+ select_timeout = blocking_locks_timeout(SMBD_SELECT_TIMEOUT);
+ select_timeout *= 1000;
- InBuffer += SMB_ALIGNMENT;
- OutBuffer += SMB_ALIGNMENT;
+ t = change_notify_timeout();
+ if (t != -1) select_timeout = MIN(select_timeout, t*1000);
-#if PRIME_NMBD
- DEBUG(3,("priming nmbd\n"));
- {
- struct in_addr ip;
- ip = *interpret_addr2("localhost");
- if (zero_ip(ip)) ip = *interpret_addr2("127.0.0.1");
- *OutBuffer = 0;
- send_one_packet(OutBuffer,1,ip,NMB_PORT,SOCK_DGRAM);
- }
-#endif
+ return select_timeout;
+}
+/****************************************************************************
+ Check if services need reloading.
+****************************************************************************/
- max_recv = MIN(lp_maxxmit(),BUFFER_SIZE);
+void check_reload(int t)
+{
+ static time_t last_smb_conf_reload_time = 0;
- /* re-initialise the timezone */
- TimeInit();
+ if(last_smb_conf_reload_time == 0)
+ last_smb_conf_reload_time = t;
- while (True)
+ if (reload_after_sighup || (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK))
{
- int deadtime = lp_deadtime()*60;
- int counter;
- int last_keepalive=0;
- int service_load_counter = 0;
- BOOL got_smb = False;
-
- if (deadtime <= 0)
- deadtime = DEFAULT_SMBD_TIMEOUT;
-
-#if USE_READ_PREDICTION
- if (lp_readprediction())
- do_read_prediction();
-#endif
-
- errno = 0;
-
- for (counter=SMBD_SELECT_LOOP;
- !receive_message_or_smb(InBuffer,BUFFER_SIZE,
- SMBD_SELECT_LOOP*1000,&got_smb);
- counter += SMBD_SELECT_LOOP)
- {
- time_t t;
- BOOL allidle = True;
- extern int keepalive;
+ reload_services(True);
+ reload_after_sighup = False;
+ last_smb_conf_reload_time = t;
+ }
+}
- if (counter > 365 * 3600) /* big number of seconds. */
- {
- counter = 0;
- service_load_counter = 0;
- }
+/****************************************************************************
+ Process any timeout housekeeping. Return False if the caller should exit.
+****************************************************************************/
- if (smb_read_error == READ_EOF)
- {
- DEBUG(3,("end of file from client\n"));
- return;
- }
+static BOOL timeout_processing(int deadtime, int *select_timeout, time_t *last_timeout_processing_time)
+{
+ static time_t last_keepalive_sent_time = 0;
+ static time_t last_idle_closed_check = 0;
+ time_t t;
+ BOOL allidle = True;
+ extern int keepalive;
- if (smb_read_error == READ_ERROR)
- {
- DEBUG(3,("receive_smb error (%s) exiting\n",
- strerror(errno)));
- return;
- }
+ if (smb_read_error == READ_EOF)
+ {
+ DEBUG(3,("end of file from client\n"));
+ return False;
+ }
- t = time(NULL);
+ if (smb_read_error == READ_ERROR)
+ {
+ DEBUG(3,("receive_smb error (%s) exiting\n",
+ strerror(errno)));
+ return False;
+ }
- /* become root again if waiting */
- unbecome_user();
+ *last_timeout_processing_time = t = time(NULL);
- /* check for smb.conf reload */
- if (counter >= service_load_counter + SMBD_RELOAD_CHECK)
- {
- service_load_counter = counter;
+ if(last_keepalive_sent_time == 0)
+ last_keepalive_sent_time = t;
- /* reload services, if files have changed. */
- reload_services(True);
- }
+ if(last_idle_closed_check == 0)
+ last_idle_closed_check = t;
- /*
- * If reload_after_sighup == True then we got a SIGHUP
- * and are being asked to reload. Fix from <branko.cibej@hermes.si>
- */
+ /* become root again if waiting */
+ change_to_root_user();
- if (reload_after_sighup)
- {
- DEBUG(0,("Reloading services after SIGHUP\n"));
- reload_services(False);
- reload_after_sighup = False;
- /*
- * Use this as an excuse to print some stats.
- */
- print_stat_cache_statistics();
- }
+ /* check if we need to reload services */
+ check_reload(t);
- /* automatic timeout if all connections are closed */
- if (conn_num_open()==0 && counter >= IDLE_CLOSED_TIMEOUT)
- {
- DEBUG( 2, ( "Closing idle connection\n" ) );
- return;
- }
+ /* automatic timeout if all connections are closed */
+ if (conn_num_open()==0 && (t - last_idle_closed_check) >= IDLE_CLOSED_TIMEOUT)
+ {
+ DEBUG( 2, ( "Closing idle connection\n" ) );
+ return False;
+ }
+ else
+ last_idle_closed_check = t;
- if (keepalive && (counter-last_keepalive)>keepalive)
- {
- struct cli_state *cli = server_client();
- if (!send_keepalive(Client)) {
- DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
- return;
- }
- /* also send a keepalive to the password server if its still
- connected */
- if (cli && cli->initialised)
- send_keepalive(cli->fd);
- last_keepalive = counter;
- }
-
- /* check for connection timeouts */
- allidle = conn_idle_all(t, deadtime);
-
- if (allidle && conn_num_open()>0) {
- DEBUG(2,("Closing idle connection 2.\n"));
- return;
- }
-
- if(global_machine_password_needs_changing)
- {
- unsigned char trust_passwd_hash[16];
- time_t lct;
- pstring remote_machine_list;
-
- /*
- * We're in domain level security, and the code that
- * read the machine password flagged that the machine
- * password needs changing.
- */
+ if (keepalive && (t - last_keepalive_sent_time)>keepalive)
+ {
+ extern struct auth_context *negprot_global_auth_context;
+ if (!send_keepalive(smbd_server_fd())) {
+ DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
+ return False;
+ }
+
+ /* send a keepalive for a password server or the like.
+ This is attached to the auth_info created in the
+ negprot */
+ if (negprot_global_auth_context
+ && negprot_global_auth_context->challenge_set_method
+ && negprot_global_auth_context->challenge_set_method->send_keepalive) {
+ negprot_global_auth_context->challenge_set_method->send_keepalive
+ (&negprot_global_auth_context->challenge_set_method->private_data);
+ }
- /*
- * First, open the machine password file with an exclusive lock.
- */
+ last_keepalive_sent_time = t;
+ }
- if(!trust_password_lock( global_myworkgroup, global_myname, True)) {
- DEBUG(0,("process: unable to open the machine account password file for \
-machine %s in domain %s.\n", global_myname, global_myworkgroup ));
- continue;
- }
+ /* check for connection timeouts */
+ allidle = conn_idle_all(t, deadtime);
+
+ if (allidle && conn_num_open()>0) {
+ DEBUG(2,("Closing idle connection 2.\n"));
+ return False;
+ }
- if(!get_trust_account_password( trust_passwd_hash, &lct)) {
- DEBUG(0,("process: unable to read the machine account password for \
+ if(global_machine_password_needs_changing &&
+ /* for ADS we need to do a regular ADS password change, not a domain
+ password change */
+ lp_security() == SEC_DOMAIN)
+ {
+ unsigned char trust_passwd_hash[16];
+ time_t lct;
+ pstring remote_machine_list;
+
+ /*
+ * We're in domain level security, and the code that
+ * read the machine password flagged that the machine
+ * password needs changing.
+ */
+
+ /*
+ * First, open the machine password file with an exclusive lock.
+ */
+
+ if(!secrets_fetch_trust_account_password(global_myworkgroup, trust_passwd_hash, &lct)) {
+ DEBUG(0,("process: unable to read the machine account password for \
machine %s in domain %s.\n", global_myname, global_myworkgroup ));
- trust_password_unlock();
- continue;
- }
+ return True;
+ }
- /*
- * Make sure someone else hasn't already done this.
- */
+ /*
+ * Make sure someone else hasn't already done this.
+ */
- if(t < lct + lp_machine_password_timeout()) {
- trust_password_unlock();
- global_machine_password_needs_changing = False;
- continue;
- }
-
- pstrcpy(remote_machine_list, lp_passwordserver());
-
- change_trust_account_password( global_myworkgroup, remote_machine_list);
- trust_password_unlock();
- global_machine_password_needs_changing = False;
- }
-
- /*
- * Check to see if we have any blocking locks
- * outstanding on the queue.
- */
- process_blocking_lock_queue(t);
-
- /*
- * Check to see if we have any change notifies
- * outstanding on the queue.
- */
- process_pending_change_notify_queue(t);
+ if(t < lct + lp_machine_password_timeout()) {
+ global_machine_password_needs_changing = False;
+ return True;
}
- if(got_smb)
- process_smb(InBuffer, OutBuffer);
- else
- process_local_message(InBuffer, BUFFER_SIZE);
+ pstrcpy(remote_machine_list, lp_passwordserver());
+
+ change_trust_account_password( global_myworkgroup, remote_machine_list);
+ global_machine_password_needs_changing = False;
}
+
+ /*
+ * Check to see if we have any blocking locks
+ * outstanding on the queue.
+ */
+ process_blocking_lock_queue(t);
+
+ /*
+ * Check to see if we have any change notifies
+ * outstanding on the queue.
+ */
+ process_pending_change_notify_queue(t);
+
+ /*
+ * Now we are root, check if the log files need pruning.
+ * Force a log file check.
+ */
+ force_check_log_size();
+ check_log_size();
+
+ /*
+ * Modify the select timeout depending upon
+ * what we have remaining in our queues.
+ */
+
+ *select_timeout = setup_select_timeout();
+
+ return True;
+}
+
+/****************************************************************************
+ process commands from the client
+****************************************************************************/
+
+void smbd_process(void)
+{
+ extern int smb_echo_count;
+ time_t last_timeout_processing_time = time(NULL);
+ unsigned int num_smbs = 0;
+
+ InBuffer = (char *)malloc(BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN);
+ OutBuffer = (char *)malloc(BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN);
+ if ((InBuffer == NULL) || (OutBuffer == NULL))
+ return;
+
+ max_recv = MIN(lp_maxxmit(),BUFFER_SIZE);
+
+ while (True) {
+ int deadtime = lp_deadtime()*60;
+ int select_timeout = setup_select_timeout();
+ int num_echos;
+
+ if (deadtime <= 0)
+ deadtime = DEFAULT_SMBD_TIMEOUT;
+
+ errno = 0;
+
+ /* free up temporary memory */
+ lp_talloc_free();
+ main_loop_talloc_free();
+
+ while (!receive_message_or_smb(InBuffer,BUFFER_SIZE+LARGE_WRITEX_HDR_SIZE,select_timeout)) {
+ if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
+ return;
+ num_smbs = 0; /* Reset smb counter. */
+ }
+
+ /*
+ * Ensure we do timeout processing if the SMB we just got was
+ * only an echo request. This allows us to set the select
+ * timeout in 'receive_message_or_smb()' to any value we like
+ * without worrying that the client will send echo requests
+ * faster than the select timeout, thus starving out the
+ * essential processing (change notify, blocking locks) that
+ * the timeout code does. JRA.
+ */
+ num_echos = smb_echo_count;
+
+ process_smb(InBuffer, OutBuffer);
+
+ if (smb_echo_count != num_echos) {
+ if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
+ return;
+ num_smbs = 0; /* Reset smb counter. */
+ }
+
+ num_smbs++;
+
+ /*
+ * If we are getting smb requests in a constant stream
+ * with no echos, make sure we attempt timeout processing
+ * every select_timeout milliseconds - but only check for this
+ * every 200 smb requests.
+ */
+
+ if ((num_smbs % 200) == 0) {
+ time_t new_check_time = time(NULL);
+ if(new_check_time - last_timeout_processing_time >= (select_timeout/1000)) {
+ if(!timeout_processing( deadtime, &select_timeout, &last_timeout_processing_time))
+ return;
+ num_smbs = 0; /* Reset smb counter. */
+ last_timeout_processing_time = new_check_time; /* Reset time. */
+ }
+ }
+ }
}
git.samba.org / tprouty / samba.git / blobdiff