Ensure that only parse_prs.c access internal members of the prs_struct.

Needed to move to disk based i/o later.
Jeremy.
(This used to be commit a823fee5b41a5b6cd4ef05aa1f85f7725bd272a5)

11 files changed, 118 insertions, 79 deletions

diff --git a/source3/auth/auth_winbind.c b/source3/auth/auth_winbind.c
index e45e2c879f..5e1567d3c1 100644
--- a/source3/auth/auth_winbind.c
+++ b/source3/auth/auth_winbind.c
@@ -36,8 +36,8 @@ static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response
 		if (!prs_init(&ps, len, mem_ctx, UNMARSHALL)) {
 			return NT_STATUS_NO_MEMORY;
 		}
-		prs_append_data(&ps, info3_ndr, len);
-		ps.data_offset = 0;
+		prs_copy_data_in(&ps, info3_ndr, len);
+		prs_set_offset(&ps,0);
 		if (!net_io_user_info3("", info3, &ps, 1, 3)) {
 			DEBUG(2, ("get_info3_from_ndr: could not parse info3 struct!\n"));
 			return NT_STATUS_UNSUCCESSFUL;
diff --git a/source3/libads/ldap.c b/source3/libads/ldap.c
index 867d124273..47a94f0a08 100644
--- a/source3/libads/ldap.c
+++ b/source3/libads/ldap.c
@@ -1157,8 +1157,8 @@ static void dump_sd(const char *filed, struct berval **values)
 
 	/* prepare data */
 	prs_init(&ps, values[0]->bv_len, ctx, UNMARSHALL);
-	prs_append_data(&ps, values[0]->bv_val, values[0]->bv_len);
-	ps.data_offset = 0;
+	prs_copy_data_in(&ps, values[0]->bv_val, values[0]->bv_len);
+	prs_set_offset(&ps,0);
 
 	/* parse secdesc */
 	if (!sec_io_desc("sd", &psd, &ps, 1)) {
@@ -1478,7 +1478,13 @@ ADS_STATUS ads_set_machine_sd(ADS_STRUCT *ads, const char *hostname, char *dn)
 	if (!(mods = ads_init_mods(ctx))) return ADS_ERROR(LDAP_NO_MEMORY);
 
 	bval.bv_len = sd_size;
-	bval.bv_val = prs_data_p(&ps_wire);
+	bval.bv_val = talloc(ctx, sd_size);
+	if (!bval.bv_val) {
+		ret = ADS_ERROR(LDAP_NO_MEMORY);
+		goto ads_set_sd_error;
+	}
+	prs_copy_all_data_out((char *)&bval.bv_val, &ps_wire);
+
 	ads_mod_ber(ctx, &mods, attrs[0], &bval);
 	ret = ads_gen_mod(ads, dn, mods);
 
@@ -1726,8 +1732,8 @@ BOOL ads_pull_sd(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
 
 	if (values[0]) {
 		prs_init(&ps, values[0]->bv_len, mem_ctx, UNMARSHALL);
-		prs_append_data(&ps, values[0]->bv_val, values[0]->bv_len);
-		ps.data_offset = 0;
+		prs_copy_data_in(&ps, values[0]->bv_val, values[0]->bv_len);
+		prs_set_offset(&ps,0);
 
 		ret = sec_io_desc("sd", sd, &ps, 1);
 	}
diff --git a/source3/libsmb/clisecdesc.c b/source3/libsmb/clisecdesc.c
index 7dd2747ff6..20154dbeb2 100644
--- a/source3/libsmb/clisecdesc.c
+++ b/source3/libsmb/clisecdesc.c
@@ -54,8 +54,8 @@ SEC_DESC *cli_query_secdesc(struct cli_state *cli, int fnum,
 	}
 
 	prs_init(&pd, rdata_count, mem_ctx, UNMARSHALL);
-	prs_append_data(&pd, rdata, rdata_count);
-	pd.data_offset = 0;
+	prs_copy_data_in(&pd, rdata, rdata_count);
+	prs_set_offset(&pd,0);
 
 	if (!sec_io_desc("sd data", &psd, &pd, 1)) {
 		DEBUG(1,("Failed to parse secdesc\n"));
@@ -104,7 +104,7 @@ BOOL cli_set_secdesc(struct cli_state *cli, int fnum, SEC_DESC *sd)
 			       0, 
 			       NULL, 0, 0,
 			       param, 8, 0,
-			       pd.data_p, pd.data_offset, 0)) {
+			       prs_data_p(&pd), prs_offset(&pd), 0)) {
 		DEBUG(1,("Failed to send NT_TRANSACT_SET_SECURITY_DESC\n"));
 		goto cleanup;
 	}
diff --git a/source3/nsswitch/winbindd_pam.c b/source3/nsswitch/winbindd_pam.c
index f3237f08da..e24afbabd6 100644
--- a/source3/nsswitch/winbindd_pam.c
+++ b/source3/nsswitch/winbindd_pam.c
@@ -42,11 +42,12 @@ static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
 	}
 
 	size = prs_data_size(&ps);
-	state->response.extra_data = memdup(prs_data_p(&ps), size);
+	state->response.extra_data = malloc(size);
 	if (!state->response.extra_data) {
 		prs_mem_free(&ps);
 		return NT_STATUS_NO_MEMORY;
 	}
+	prs_copy_all_data_out(state->response.extra_data, &ps);
 	state->response.length += size;
 	prs_mem_free(&ps);
 	return NT_STATUS_OK;
diff --git a/source3/rpc_client/cli_spoolss.c b/source3/rpc_client/cli_spoolss.c
index 0a168d93ba..a1aa6664c1 100644
--- a/source3/rpc_client/cli_spoolss.c
+++ b/source3/rpc_client/cli_spoolss.c
@@ -58,7 +58,7 @@ static void decode_printer_info_0(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(PRINTER_INFO_0 *)talloc(mem_ctx, returned*sizeof(PRINTER_INFO_0));
 	memset(inf, 0, returned*sizeof(PRINTER_INFO_0));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
                 smb_io_printer_info_0("", buffer, &inf[i], 0);
@@ -78,7 +78,7 @@ static void decode_printer_info_1(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(PRINTER_INFO_1 *)talloc(mem_ctx, returned*sizeof(PRINTER_INFO_1));
 	memset(inf, 0, returned*sizeof(PRINTER_INFO_1));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
                 smb_io_printer_info_1("", buffer, &inf[i], 0);
@@ -98,7 +98,7 @@ static void decode_printer_info_2(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(PRINTER_INFO_2 *)talloc(mem_ctx, returned*sizeof(PRINTER_INFO_2));
 	memset(inf, 0, returned*sizeof(PRINTER_INFO_2));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
 		/* a little initialization as we go */
@@ -120,7 +120,7 @@ static void decode_printer_info_3(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(PRINTER_INFO_3 *)talloc(mem_ctx, returned*sizeof(PRINTER_INFO_3));
 	memset(inf, 0, returned*sizeof(PRINTER_INFO_3));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
 		inf[i].secdesc = NULL;
@@ -181,7 +181,7 @@ static void decode_printer_driver_1(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(DRIVER_INFO_1 *)talloc(mem_ctx, returned*sizeof(DRIVER_INFO_1));
 	memset(inf, 0, returned*sizeof(DRIVER_INFO_1));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
                 smb_io_printer_driver_info_1("", buffer, &(inf[i]), 0);
@@ -201,7 +201,7 @@ static void decode_printer_driver_2(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(DRIVER_INFO_2 *)talloc(mem_ctx, returned*sizeof(DRIVER_INFO_2));
 	memset(inf, 0, returned*sizeof(DRIVER_INFO_2));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
                 smb_io_printer_driver_info_2("", buffer, &(inf[i]), 0);
@@ -221,7 +221,7 @@ static void decode_printer_driver_3(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
         inf=(DRIVER_INFO_3 *)talloc(mem_ctx, returned*sizeof(DRIVER_INFO_3));
 	memset(inf, 0, returned*sizeof(DRIVER_INFO_3));
 
-        buffer->prs.data_offset=0;
+	prs_set_offset(&buffer->prs,0);
 
         for (i=0; i<returned; i++) {
                 smb_io_printer_driver_info_3("", buffer, &(inf[i]), 0);
@@ -1424,7 +1424,7 @@ static void decode_forms_1(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
 	int i;
 
 	*forms = (FORM_1 *)talloc(mem_ctx, num_forms * sizeof(FORM_1));
-	buffer->prs.data_offset = 0;
+	prs_set_offset(&buffer->prs,0);
 
 	for (i = 0; i < num_forms; i++)
 		smb_io_form_1("", buffer, &((*forms)[i]), 0);
@@ -1506,7 +1506,7 @@ static void decode_jobs_1(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
 	uint32 i;
 
 	*jobs = (JOB_INFO_1 *)talloc(mem_ctx, num_jobs * sizeof(JOB_INFO_1));
-	buffer->prs.data_offset = 0;
+	prs_set_offset(&buffer->prs,0);
 
 	for (i = 0; i < num_jobs; i++) 
 		smb_io_job_info_1("", buffer, &((*jobs)[i]), 0);
@@ -1518,7 +1518,7 @@ static void decode_jobs_2(TALLOC_CTX *mem_ctx, NEW_BUFFER *buffer,
 	uint32 i;
 
 	*jobs = (JOB_INFO_2 *)talloc(mem_ctx, num_jobs * sizeof(JOB_INFO_2));
-	buffer->prs.data_offset = 0;
+	prs_set_offset(&buffer->prs,0);
 
 	for (i = 0; i < num_jobs; i++) 
 		smb_io_job_info_2("", buffer, &((*jobs)[i]), 0);
diff --git a/source3/rpc_parse/parse_net.c b/source3/rpc_parse/parse_net.c
index 853bca3b54..1e31836476 100644
--- a/source3/rpc_parse/parse_net.c
+++ b/source3/rpc_parse/parse_net.c
@@ -1804,9 +1804,9 @@ static BOOL net_io_sam_domain_info(const char *desc, SAM_DOMAIN_INFO * info,
 	if (!smb_io_unihdr("hdr_unknown", &info->hdr_unknown, ps, depth))
                 return False;
 
-	if (ps->data_offset + 40 > ps->buffer_size)
+	if (prs_offset(ps) + 40 > prs_data_size(ps))
                 return False;
-        ps->data_offset += 40;
+        prs_set_offset(ps, prs_offset(ps) + 40);
 
 	if (!smb_io_unistr2("uni_dom_name", &info->uni_dom_name,
                             info->hdr_dom_name.buffer, ps, depth))
@@ -1843,9 +1843,9 @@ static BOOL net_io_sam_group_info(const char *desc, SAM_GROUP_INFO * info,
 	if (!smb_io_bufhdr2("hdr_sec_desc", &info->hdr_sec_desc, ps, depth))
                 return False;
 
-        if (ps->data_offset + 48 > ps->buffer_size)
+	if (prs_offset(ps) + 48 > prs_data_size(ps))
                 return False;
-	ps->data_offset += 48;
+        prs_set_offset(ps, prs_offset(ps) + 48);
 
 	if (!smb_io_unistr2("uni_grp_name", &info->uni_grp_name,
                             info->hdr_grp_name.buffer, ps, depth))
@@ -2124,13 +2124,13 @@ static BOOL net_io_sam_account_info(const char *desc, uint8 sess_key[16],
 		uint32 len = 0x44;
 		if (!prs_uint32("pwd_len", ps, depth, &len))
                         return False;
-		old_offset = ps->data_offset;
+		old_offset = prs_offset(ps);
 		if (len == 0x44)
 		{
 			if (ps->io)
 			{
 				/* reading */
-                                if (!prs_hash1(ps, ps->data_offset, sess_key))
+                                if (!prs_hash1(ps, prs_offset(ps), sess_key))
                                         return False;
 			}
 			if (!net_io_sam_passwd_info("pass", &info->pass, 
@@ -2144,9 +2144,9 @@ static BOOL net_io_sam_account_info(const char *desc, uint8 sess_key[16],
                                         return False;
 			}
 		}
-                if (old_offset + len > ps->buffer_size)
+                if (old_offset + len > prs_data_size(ps))
                         return False;
-		ps->data_offset = old_offset + len;
+		prs_set_offset(ps, old_offset + len);
 	}
 	if (!smb_io_buffer4("buf_sec_desc", &info->buf_sec_desc,
                             info->hdr_sec_desc.buffer, ps, depth))
@@ -2181,9 +2181,9 @@ static BOOL net_io_sam_group_mem_info(const char *desc, SAM_GROUP_MEM_INFO * inf
 	if (!prs_uint32("num_members", ps, depth, &info->num_members))
                 return False;
 
-        if (ps->data_offset + 16 > ps->buffer_size)
+        if (prs_offset(ps) + 16 > prs_data_size(ps))
                 return False;
-	ps->data_offset += 16;
+	prs_set_offset(ps, prs_offset(ps) + 16);
 
 	if (info->ptr_rids != 0)
 	{
@@ -2263,9 +2263,9 @@ static BOOL net_io_sam_alias_info(const char *desc, SAM_ALIAS_INFO * info,
 	if (!smb_io_unihdr("hdr_als_desc", &info->hdr_als_desc, ps, depth))
                 return False;
 
-        if (ps->data_offset + 40 > ps->buffer_size)
+        if (prs_offset(ps) + 40 > prs_data_size(ps))
                 return False;
-	ps->data_offset += 40;
+	prs_set_offset(ps, prs_offset(ps) + 40);
 
 	if (!smb_io_unistr2("uni_als_name", &info->uni_als_name,
                             info->hdr_als_name.buffer, ps, depth))
@@ -2300,9 +2300,9 @@ static BOOL net_io_sam_alias_mem_info(const char *desc, SAM_ALIAS_MEM_INFO * inf
 
 	if (info->ptr_members != 0)
 	{
-                if (ps->data_offset + 16 > ps->buffer_size)
+                if (prs_offset(ps) + 16 > prs_data_size(ps))
                         return False;
-                ps->data_offset += 16;
+                prs_set_offset(ps, prs_offset(ps) + 16);
 
 		if (!prs_uint32("num_sids", ps, depth, &info->num_sids))
                         return False;
diff --git a/source3/rpc_parse/parse_prs.c b/source3/rpc_parse/parse_prs.c
index 6f6117a9e2..702375be35 100644
--- a/source3/rpc_parse/parse_prs.c
+++ b/source3/rpc_parse/parse_prs.c
@@ -134,7 +134,8 @@ void prs_mem_free(prs_struct *ps)
 
 void prs_mem_clear(prs_struct *ps)
 {
-	memset(ps->data_p, '\0', (size_t)ps->buffer_size);
+	if (ps->buffer_size)
+		memset(ps->data_p, '\0', (size_t)ps->buffer_size);
 }
 
 /*******************************************************************
@@ -143,11 +144,13 @@ void prs_mem_clear(prs_struct *ps)
 
 char *prs_alloc_mem(prs_struct *ps, size_t size)
 {
-	char *ret = talloc(ps->mem_ctx, size);
-
-	if (ret)
-		memset(ret, '\0', size);
+	char *ret = NULL;
 
+	if (size) {
+		ret = talloc(ps->mem_ctx, size);
+		if (ret)
+			memset(ret, '\0', size);
+	}
 	return ret;
 }
 
@@ -308,7 +311,7 @@ BOOL prs_force_grow(prs_struct *ps, uint32 extra_space)
 
 /*******************************************************************
  Get the data pointer (external interface).
- ********************************************************************/
+********************************************************************/
 
 char *prs_data_p(prs_struct *ps)
 {
@@ -357,10 +360,13 @@ BOOL prs_set_offset(prs_struct *ps, uint32 offset)
 
 BOOL prs_append_prs_data(prs_struct *dst, prs_struct *src)
 {
+	if (prs_offset(src) == 0)
+		return True;
+
 	if(!prs_grow(dst, prs_offset(src)))
 		return False;
 
-	memcpy(&dst->data_p[dst->data_offset], prs_data_p(src), (size_t)prs_offset(src));
+	memcpy(&dst->data_p[dst->data_offset], src->data_p, (size_t)prs_offset(src));
 	dst->data_offset += prs_offset(src);
 
 	return True;
@@ -378,7 +384,7 @@ BOOL prs_append_some_prs_data(prs_struct *dst, prs_struct *src, int32 start, uin
 	if(!prs_grow(dst, len))
 		return False;
 	
-	memcpy(&dst->data_p[dst->data_offset], prs_data_p(src)+start, (size_t)len);
+	memcpy(&dst->data_p[dst->data_offset], src->data_p + start, (size_t)len);
 	dst->data_offset += len;
 
 	return True;
@@ -388,8 +394,11 @@ BOOL prs_append_some_prs_data(prs_struct *dst, prs_struct *src, int32 start, uin
  Append the data from a buffer into a parse_struct.
  ********************************************************************/
 
-BOOL prs_append_data(prs_struct *dst, char *src, uint32 len)
+BOOL prs_copy_data_in(prs_struct *dst, char *src, uint32 len)
 {
+	if (len == 0)
+		return True;
+
 	if(!prs_grow(dst, len))
 		return False;
 
@@ -400,6 +409,39 @@ BOOL prs_append_data(prs_struct *dst, char *src, uint32 len)
 }
 
 /*******************************************************************
+ Copy some data from a parse_struct into a buffer.
+ ********************************************************************/
+
+BOOL prs_copy_data_out(char *dst, prs_struct *src, uint32 len)
+{
+	if (len == 0)
+		return True;
+
+	if(!prs_mem_get(src, len))
+		return False;
+
+	memcpy(dst, &src->data_p[src->data_offset], (size_t)len);
+	src->data_offset += len;
+
+	return True;
+}
+
+/*******************************************************************
+ Copy all the data from a parse_struct into a buffer.
+ ********************************************************************/
+
+BOOL prs_copy_all_data_out(char *dst, prs_struct *src)
+{
+	uint32 len = prs_offset(src);
+
+	if (!len)
+		return True;
+
+	prs_set_offset(src, 0);
+	return prs_copy_data_out(dst, src, len);
+}
+
+/*******************************************************************
  Set the data as X-endian (external interface).
  ********************************************************************/
 
@@ -1049,7 +1091,7 @@ BOOL prs_unistr(const char *name, prs_struct *ps, int depth, UNISTR *str)
 	else { /* unmarshalling */
 	
 		uint32 alloc_len = 0;
-		q = prs_data_p(ps) + prs_offset(ps);
+		q = ps->data_p + prs_offset(ps);
 
 		/*
 		 * Work out how much space we need and talloc it.
@@ -1242,7 +1284,7 @@ int tdb_prs_store(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps)
     TDB_DATA kbuf, dbuf;
     kbuf.dptr = keystr;
     kbuf.dsize = strlen(keystr)+1;
-    dbuf.dptr = prs_data_p(ps);
+    dbuf.dptr = ps->data_p;
     dbuf.dsize = prs_offset(ps);
     return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE);
 }
@@ -1272,7 +1314,7 @@ BOOL prs_hash1(prs_struct *ps, uint32 offset, uint8 sess_key[16])
 {
 	char *q;
 
-	q = prs_data_p(ps);
+	q = ps->data_p;
         q = &q[offset];
 
 #ifdef DEBUG_PASSWORD
diff --git a/source3/rpc_parse/parse_sec.c b/source3/rpc_parse/parse_sec.c
index a49a34139e..dbd72e5250 100644
--- a/source3/rpc_parse/parse_sec.c
+++ b/source3/rpc_parse/parse_sec.c
@@ -782,7 +782,7 @@ BOOL sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
 
 	if (psd->off_owner_sid != 0) {
 
-		tmp_offset = ps->data_offset;
+		tmp_offset = prs_offset(ps);
 		if(!prs_set_offset(ps, old_offset + psd->off_owner_sid))
 			return False;
 
@@ -803,7 +803,7 @@ BOOL sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
 
 	if (psd->off_grp_sid != 0) {
 
-		tmp_offset = ps->data_offset;
+		tmp_offset = prs_offset(ps);
 		if(!prs_set_offset(ps, old_offset + psd->off_grp_sid))
 			return False;
 
@@ -823,7 +823,7 @@ BOOL sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
 	}
 
 	if ((psd->type & SEC_DESC_SACL_PRESENT) && psd->off_sacl) {
-		tmp_offset = ps->data_offset;
+		tmp_offset = prs_offset(ps);
 		if(!prs_set_offset(ps, old_offset + psd->off_sacl))
 			return False;
 		if(!sec_io_acl("sacl", &psd->sacl, ps, depth))
@@ -835,7 +835,7 @@ BOOL sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
 
 
 	if ((psd->type & SEC_DESC_DACL_PRESENT) && psd->off_dacl != 0) {
-		tmp_offset = ps->data_offset;
+		tmp_offset = prs_offset(ps);
 		if(!prs_set_offset(ps, old_offset + psd->off_dacl))
 			return False;
 		if(!sec_io_acl("dacl", &psd->dacl, ps, depth))
diff --git a/source3/rpc_server/srv_pipe.c b/source3/rpc_server/srv_pipe.c
index 4c4b3e7af3..50127005a1 100644
--- a/source3/rpc_server/srv_pipe.c
+++ b/source3/rpc_server/srv_pipe.c
@@ -84,8 +84,6 @@ BOOL create_next_pdu(pipes_struct *p)
 	uint32 data_space_available;
 	uint32 data_len_left;
 	prs_struct outgoing_pdu;
-	char *data;
-	char *data_from;
 	uint32 data_pos;
 
 	/*
@@ -187,26 +185,26 @@ BOOL create_next_pdu(pipes_struct *p)
 	data_pos = prs_offset(&outgoing_pdu);
 
 	/* Copy the data into the PDU. */
-	data_from = prs_data_p(&p->out_data.rdata) + p->out_data.data_sent_length;
 
-	if(!prs_append_data(&outgoing_pdu, data_from, data_len)) {
+	if(!prs_append_some_prs_data(&outgoing_pdu, &p->out_data.rdata, p->out_data.data_sent_length, data_len)) {
 		DEBUG(0,("create_next_pdu: failed to copy %u bytes of data.\n", (unsigned int)data_len));
 		prs_mem_free(&outgoing_pdu);
 		return False;
 	}
 
-	/*
-	 * Set data to point to where we copied the data into.
-	 */
-
-	data = prs_data_p(&outgoing_pdu) + data_pos;
-
 	if (p->hdr.auth_len > 0) {
 		uint32 crc32 = 0;
+		char *data;
 
 		DEBUG(5,("create_next_pdu: sign: %s seal: %s data %d auth %d\n",
 			 BOOLSTR(auth_verify), BOOLSTR(auth_seal), data_len, p->hdr.auth_len));
 
+		/*
+		 * Set data to point to where we copied the data into.
+		 */
+
+		data = prs_data_p(&outgoing_pdu) + data_pos;
+
 		if (auth_seal) {
 			crc32 = crc32_calc_buffer(data, data_len);
 			NTLMSSPcalc_p(p, (uchar*)data, data_len);
@@ -1389,17 +1387,15 @@ BOOL api_rpcTNP(pipes_struct *p, const char *rpc_name,
 	/* Check for buffer underflow in rpc parsing */
 
 	if ((DEBUGLEVEL >= 10) && 
-	    (p->in_data.data.data_offset != p->in_data.data.buffer_size)) {
-		int data_len = p->in_data.data.buffer_size - 
-			p->in_data.data.data_offset;
+	    (prs_offset(&p->in_data.data) != prs_data_size(&p->in_data.data))) {
+		size_t data_len = prs_data_size(&p->in_data.data) - prs_offset(&p->in_data.data);
 		char *data;
 
 		data = malloc(data_len);
 
 		DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
 		if (data) {
-			prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data,
-				   data_len);
+			prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data, (uint32)data_len);
 			SAFE_FREE(data);
 		}
 
diff --git a/source3/rpc_server/srv_pipe_hnd.c b/source3/rpc_server/srv_pipe_hnd.c
index 6cdb6836eb..8cb81b9c6d 100644
--- a/source3/rpc_server/srv_pipe_hnd.c
+++ b/source3/rpc_server/srv_pipe_hnd.c
@@ -618,16 +618,11 @@ authentication failed. Denying the request.\n", p->name));
 	 * Append the data portion into the buffer and return.
 	 */
 
-	{
-		char *data_from = prs_data_p(rpc_in_p) + prs_offset(rpc_in_p);
-
-		if(!prs_append_data(&p->in_data.data, data_from, data_len)) {
-			DEBUG(0,("process_request_pdu: Unable to append data size %u to parse buffer of size %u.\n",
-					(unsigned int)data_len, (unsigned int)prs_data_size(&p->in_data.data) ));
-			set_incoming_fault(p);
-			return False;
-		}
-
+	if(!prs_append_some_prs_data(&p->in_data.data, rpc_in_p, prs_offset(rpc_in_p), data_len)) {
+		DEBUG(0,("process_request_pdu: Unable to append data size %u to parse buffer of size %u.\n",
+				(unsigned int)data_len, (unsigned int)prs_data_size(&p->in_data.data) ));
+		set_incoming_fault(p);
+		return False;
 	}
 
 	if(p->hdr.flags & RPC_FLG_LAST) {
diff --git a/source3/rpc_server/srv_spoolss_nt.c b/source3/rpc_server/srv_spoolss_nt.c
index 594c749c9c..8304b14a1c 100644
--- a/source3/rpc_server/srv_spoolss_nt.c
+++ b/source3/rpc_server/srv_spoolss_nt.c
@@ -706,10 +706,9 @@ static void notify_system_time(struct spoolss_notify_msg *msg,
 		return;
 
 	data->notify_data.data.length = prs_offset(&ps);
-	data->notify_data.data.string =
-		talloc(mem_ctx, prs_offset(&ps));
+	data->notify_data.data.string = talloc(mem_ctx, prs_offset(&ps));
 
-	memcpy(data->notify_data.data.string, prs_data_p(&ps), prs_offset(&ps));
+	prs_copy_all_data_out((char *)data->notify_data.data.string, &ps);
 
 	prs_mem_free(&ps);
 }