From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/smbd/srvstr.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 source3/smbd/srvstr.c (limited to 'source3/smbd/srvstr.c') diff --git a/source3/smbd/srvstr.c b/source3/smbd/srvstr.c new file mode 100644 index 0000000..5298ea7 --- /dev/null +++ b/source3/smbd/srvstr.c @@ -0,0 +1,78 @@ +/* + Unix SMB/CIFS implementation. + server specific string routines + Copyright (C) Andrew Tridgell 2001 + Copyright (C) Andrew Bartlett 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 3 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, see . +*/ + +#include "includes.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "lib/util/string_wrappers.h" + +/* Make sure we can't write a string past the end of the buffer */ + +NTSTATUS srvstr_push_fn(const char *base_ptr, uint16_t smb_flags2, void *dest, + const char *src, int dest_len, int flags, size_t *ret_len) +{ + size_t len; + int saved_errno; + NTSTATUS status; + + if (dest_len < 0) { + return NT_STATUS_INVALID_PARAMETER; + } + + saved_errno = errno; + errno = 0; + + /* 'normal' push into size-specified buffer */ + len = push_string_base(base_ptr, smb_flags2, dest, src, + dest_len, flags); + + if (errno != 0) { + /* + * Special case E2BIG, EILSEQ, EINVAL + * as they mean conversion errors here, + * but we don't generically map them as + * they can mean different things in + * generic filesystem calls (such as + * read xattrs). + */ + if (errno == E2BIG || errno == EILSEQ || errno == EINVAL) { + status = NT_STATUS_ILLEGAL_CHARACTER; + } else { + status = map_nt_error_from_unix_common(errno); + /* + * Paranoia - Filter out STATUS_MORE_ENTRIES. + * I don't think we can get this but it has a + * specific meaning to the client. + */ + if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) { + status = NT_STATUS_UNSUCCESSFUL; + } + } + DEBUG(10,("character conversion failure " + "on string (%s) (%s)\n", + src, strerror(errno))); + } else { + /* Success - restore untouched errno. */ + errno = saved_errno; + *ret_len = len; + status = NT_STATUS_OK; + } + return status; +} -- cgit v1.2.3