delineation between smb and msrpc more marked. smbd now constructs

pdus, and then feeds them over either a "local" function call or a "remote"
function call to an msrpc service.  the "remote" msrpc daemon, on the
other side of a unix socket, then calls the same "local" function that
smbd would, if the msrpc service were being run from inside smbd.

this allows a transition from local msrpc services (inside the same smbd
process) to remote (over a unix socket).

removed reference to pipes_struct in msrpc services.  all msrpc processing
functions take rpcsrv_struct which is a structure containing state info
for the msrpc functions to decode and create pdus.

created become_vuser() which does everything not related to connection_struct
that become_user() does.

removed, as best i could, connection_struct dependencies from the nt spoolss
printing code.

todo: remove dcinfo from rpcsrv_struct because this stores NETLOGON-specific
info on a per-connection basis, and if the connection dies then so does
the info, and that's a fairly serious problem.

had to put pretty much everything that is in user_struct into parse_creds.c
to feed unix user info over to the msrpc daemons.  why?  because it's
expensive to do unix password/group database lookups, and it's definitely
expensive to do nt user profile lookups, not to mention pretty difficult
and if you did either of these it would introduce a complication /
unnecessary interdependency.  so, send uid/gid/num_groups/gid_t* +
SID+num_rids+domain_group_rids* + unix username + nt username + nt domain
+ user session key etc.  this is the MINIMUM info identified so far that's
actually implemented.  missing bits include the called and calling
netbios names etc.  (basically, anything that can be loaded into
standard_sub() and standard_sub_basic()...)
(This used to be commit aa3c659a8dba0437c17c60055a6ed30fdfecdb6d)

1 files changed, 80 insertions, 12 deletions

diff --git a/source3/rpc_parse/parse_prs.c b/source3/rpc_parse/parse_prs.c
index 4c52e15769..d9c07e3885 100644
--- a/source3/rpc_parse/parse_prs.c
+++ b/source3/rpc_parse/parse_prs.c
@@ -39,10 +39,11 @@ void prs_debug(prs_struct *ps, int depth, char *desc, char *fn_name)
 /*******************************************************************
  debug a parse structure
  ********************************************************************/
-void prs_debug_out(prs_struct *ps, int level)
+void prs_debug_out(prs_struct *ps, char *msg, int level)
 {
-	DEBUG(level,("ps: io %s align %d offset %d err %d data %p len %d\n",
-		BOOLSTR(ps->io), ps->align, ps->offset, ps->error, ps->data,
+	DEBUG(level,("%s ps: io %s align %d offset %d err %d data %p len %d\n",
+		msg, BOOLSTR(ps->io), ps->align, ps->offset, ps->error,
+		ps->data,
 		ps->data != NULL ? mem_buf_len(ps->data) : 0));
 }
 
@@ -70,6 +71,22 @@ void prs_init(prs_struct *ps, uint32 size,
 }
 
 /*******************************************************************
+ copy a parse structure
+ ********************************************************************/
+BOOL prs_copy(prs_struct *ps, const prs_struct *from)
+{
+	int len = mem_buf_len(from->data);
+	prs_init(ps, len, from->align, from->data->margin, from->io);
+	if (!mem_buf_copy(mem_data(&ps->data, 0), from->data, 0, len))
+	{
+		return False;
+	}
+	ps->offset = len;
+	prs_link(NULL, ps, NULL);
+	return True;
+}
+
+/*******************************************************************
  initialise a parse structure
  ********************************************************************/
 void prs_mem_free(prs_struct *ps)
@@ -85,6 +102,10 @@ void prs_link(prs_struct *prev, prs_struct *ps, prs_struct *next)
 	ps->data->offset.start = prev != NULL ? prev->data->offset.end : 0;
 	ps->data->offset.end   = ps->data->offset.start + ps->offset;
 	ps->data->next         = next != NULL ? next->data : NULL;
+
+	DEBUG(150,("prs_link: start %d end %d\n",
+		ps->data->offset.start,
+		ps->data->offset.end));
 }
 
 /*******************************************************************
@@ -107,12 +128,31 @@ void prs_align(prs_struct *ps)
 
  depends on the data stream mode (io)
  ********************************************************************/
-BOOL prs_grow(prs_struct *ps)
+BOOL prs_grow(prs_struct *ps, uint32 new_size)
 {
 	if (ps->error) return False;
-	return mem_grow_data(&(ps->data), ps->io, ps->offset, False);
+	return mem_grow_data(&(ps->data), ps->io, new_size, False);
 }
 
+/*******************************************************************
+ lengthens a buffer by len bytes and copies data into it.
+ ********************************************************************/
+BOOL prs_append_data(prs_struct *ps, const char *data, int len)
+{
+	int prev_size = ps->data->data_used;
+	int new_size  = prev_size + len;
+	char *to;
+
+	mem_realloc_data(ps->data, new_size);
+	to = mem_data(&ps->data, prev_size);
+	if (to == NULL || ps->data->data_used != new_size)
+	{
+		return False;
+	}
+	memcpy(to, data, len);
+
+	return True;
+}
 
 /*******************************************************************
  stream a uint8
@@ -121,16 +161,19 @@ BOOL _prs_uint8(char *name, prs_struct *ps, int depth, uint8 *data8)
 {
 	char *q;
 	if (ps->error) return False;
+	prs_grow(ps, ps->offset + 1);
 	q = mem_data(&(ps->data), ps->offset);
 	if (q == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint8 error", 5);
 		return False;
 	}
 
 	DBG_RW_CVAL(name, depth, ps->offset, ps->io, q, *data8)
 	ps->offset += 1;
 
+
 	return True;
 }
 
@@ -141,10 +184,12 @@ BOOL _prs_uint16(char *name, prs_struct *ps, int depth, uint16 *data16)
 {
 	char *q;
 	if (ps->error) return False;
+	prs_grow(ps, ps->offset + 2);
 	q = mem_data(&(ps->data), ps->offset);
 	if (q == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint16 error", 5);
 		return False;
 	}
 
@@ -165,6 +210,7 @@ BOOL _prs_hash1(prs_struct *ps, uint32 offset, uint8 sess_key[16])
 	if (q == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_hash1 error", 5);
 		return False;
 	}
 
@@ -188,10 +234,12 @@ BOOL _prs_uint32(char *name, prs_struct *ps, int depth, uint32 *data32)
 {
 	char *q;
 	if (ps->error) return False;
+	prs_grow(ps, ps->offset + 4);
 	q = mem_data(&(ps->data), ps->offset);
 	if (q == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint32 error", 5);
 		return False;
 	}
 
@@ -211,13 +259,15 @@ BOOL _prs_uint8s(BOOL charmode, char *name, prs_struct *ps, int depth, uint8 *da
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + len * sizeof(uint8);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL) 
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint8s error", 5);
 		return False;
 	}
 
@@ -236,13 +286,15 @@ BOOL _prs_uint16s(BOOL charmode, char *name, prs_struct *ps, int depth, uint16 *
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + len * sizeof(uint16);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint16s error", 5);
 		return False;
 	}
 
@@ -261,13 +313,15 @@ BOOL _prs_uint32s(BOOL charmode, char *name, prs_struct *ps, int depth, uint32 *
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + len * sizeof(uint32);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_uint32s error", 5);
 		return False;
 	}
 
@@ -287,13 +341,15 @@ BOOL _prs_buffer2(BOOL charmode, char *name, prs_struct *ps, int depth, BUFFER2
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
+	end_offset = ps->offset + str->buf_len * sizeof(uint8);
+	prs_grow(ps, end_offset);
 	q = mem_data(&(ps->data), ps->offset);
-	end_offset = ps->offset + str->buf_len;
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_buffer2 error", 5);
 		return False;
 	}
 
@@ -313,13 +369,15 @@ BOOL _prs_string2(BOOL charmode, char *name, prs_struct *ps, int depth, STRING2
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + str->str_str_len * sizeof(uint8);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_string2 error", 5);
 		return False;
 	}
 
@@ -339,13 +397,15 @@ BOOL _prs_unistr2(BOOL charmode, char *name, prs_struct *ps, int depth, UNISTR2
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + str->uni_str_len * sizeof(uint16);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_unistr2 error", 5);
 		return False;
 	}
 
@@ -365,13 +425,15 @@ BOOL _prs_unistr3(BOOL charmode, char *name, UNISTR3 *str, prs_struct *ps, int d
 	int end_offset;
 	char *e;
 	if (ps->error) return False;
-	q = mem_data(&(ps->data), ps->offset);
 	end_offset = ps->offset + str->uni_str_len * sizeof(uint16);
+	prs_grow(ps, end_offset);
+	q = mem_data(&(ps->data), ps->offset);
 	e = mem_data(&(ps->data), end_offset-1);
 
 	if (q == NULL || e == NULL)
 	{
 		ps->error = True;
+		prs_debug_out(ps, "_prs_unistr3 error", 5);
 		return False;
 	}
 
@@ -395,10 +457,12 @@ BOOL _prs_unistr(char *name, prs_struct *ps, int depth, UNISTR *str)
 	{
 		char *q;
 		i++;
+		prs_grow(ps, ps->offset + i*2);
 		q = mem_data(&(ps->data), ps->offset + i*2);
 		if (q == NULL) 
 		{
 			ps->error = True;
+			prs_debug_out(ps, "_prs_unistr error", 5);
 			return False;
 		}
 		RW_SVAL(ps->io, q, str->buffer[i],0);
@@ -432,15 +496,19 @@ BOOL _prs_string(char *name, prs_struct *ps, int depth, char *str, uint16 len, u
 	DEBUG(120,("_prs_string: string %s len %d max %d\n",
 			str, len, max_buf_size));
 
+	DEBUG(10,("%s%04x %s: ", tab_depth(depth), ps->offset, name != NULL ? name : ""));
+
 	do
 	{
 		char *q;
 		i++;
 
+		prs_grow(ps, ps->offset + i);
 		q = mem_data(&(ps->data), ps->offset + i);
 		if (q == NULL)
 		{
 			ps->error = True;
+			prs_debug_out(ps, "_prs_string error", 5);
 			return False;
 		}