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authorAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
committerAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
commitef2e26c91b80556af033d3335e55f5dfa6fff31d (patch)
treefaa21bfd7e7b5247250b47c7891dc1a5ebee6be9 /source4/libcli/raw/raweas.c
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first public release of samba4 code
(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)
Diffstat (limited to 'source4/libcli/raw/raweas.c')
-rw-r--r--source4/libcli/raw/raweas.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/source4/libcli/raw/raweas.c b/source4/libcli/raw/raweas.c
new file mode 100644
index 0000000000..ce0368c304
--- /dev/null
+++ b/source4/libcli/raw/raweas.c
@@ -0,0 +1,147 @@
+/*
+ Unix SMB/CIFS implementation.
+ parsing of EA (extended attribute) lists
+ Copyright (C) Andrew Tridgell 2003
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/*
+ work out how many bytes on the wire a ea list will consume.
+ This assumes the names are strict ascii, which should be a
+ reasonable assumption
+*/
+uint_t ea_list_size(uint_t num_eas, struct ea_struct *eas)
+{
+ uint_t total = 4;
+ int i;
+ for (i=0;i<num_eas;i++) {
+ total += 4 + strlen(eas[i].name.s)+1 + eas[i].value.length;
+ }
+ return total;
+}
+
+/*
+ put a ea_list into a pre-allocated buffer - buffer must be at least
+ of size ea_list_size()
+*/
+void ea_put_list(char *data, uint_t num_eas, struct ea_struct *eas)
+{
+ int i;
+ uint32 ea_size;
+
+ ea_size = ea_list_size(num_eas, eas);
+
+ SIVAL(data, 0, ea_size);
+ data += 4;
+
+ for (i=0;i<num_eas;i++) {
+ uint_t nlen = strlen(eas[i].name.s);
+ SCVAL(data, 0, eas[i].flags);
+ SCVAL(data, 1, nlen);
+ SSVAL(data, 2, eas[i].value.length);
+ memcpy(data+4, eas[i].name.s, nlen+1);
+ memcpy(data+4+nlen+1, eas[i].value.data, eas[i].value.length);
+ data += 4+nlen+1+eas[i].value.length;
+ }
+}
+
+
+/*
+ pull a ea_struct from a buffer. Return the number of bytes consumed
+*/
+uint_t ea_pull_struct(const DATA_BLOB *blob,
+ TALLOC_CTX *mem_ctx,
+ struct ea_struct *ea)
+{
+ uint8 nlen;
+ uint16 vlen;
+
+ if (blob->length < 6) {
+ return 0;
+ }
+
+ ea->flags = CVAL(blob->data, 0);
+ nlen = CVAL(blob->data, 1);
+ vlen = SVAL(blob->data, 2);
+
+ if (nlen+1+vlen > blob->length-4) {
+ return 0;
+ }
+
+ ea->name.s = talloc_strndup(mem_ctx, blob->data+4, nlen);
+ ea->name.private_length = nlen;
+ ea->value = data_blob_talloc(mem_ctx, NULL, vlen+1);
+ if (!ea->value.data) return 0;
+ if (vlen) {
+ memcpy(ea->value.data, blob->data+4+nlen+1, vlen);
+ }
+ ea->value.data[vlen] = 0;
+ ea->value.length--;
+
+ return 4 + nlen+1 + vlen;
+}
+
+
+/*
+ pull a ea_list from a buffer
+*/
+NTSTATUS ea_pull_list(const DATA_BLOB *blob,
+ TALLOC_CTX *mem_ctx,
+ uint_t *num_eas, struct ea_struct **eas)
+{
+ int n;
+ uint32 ea_size, ofs;
+
+ if (blob->length < 4) {
+ return NT_STATUS_INFO_LENGTH_MISMATCH;
+ }
+
+ ea_size = IVAL(blob->data, 0);
+ if (ea_size > blob->length) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ofs = 4;
+ n = 0;
+ *num_eas = 0;
+ *eas = NULL;
+
+ while (ofs < ea_size) {
+ uint_t len;
+ DATA_BLOB blob2;
+
+ blob2.data = blob->data + ofs;
+ blob2.length = ea_size - ofs;
+
+ *eas = talloc_realloc(mem_ctx, *eas, sizeof(**eas) * (n+1));
+ if (! *eas) return NT_STATUS_NO_MEMORY;
+
+ len = ea_pull_struct(&blob2, mem_ctx, &(*eas)[n]);
+ if (len == 0) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ofs += len;
+ n++;
+ }
+
+ *num_eas = n;
+
+ return NT_STATUS_OK;
+}
+