1 files changed, 139 insertions, 0 deletions
diff --git a/src/openvpnmsica/msica_arg.c b/src/openvpnmsica/msica_arg.c
new file mode 100644
index 0000000..cde0577
--- /dev/null
+++ b/src/openvpnmsica/msica_arg.c
@@ -0,0 +1,139 @@
+/*
+ *  openvpnmsica -- Custom Action DLL to provide OpenVPN-specific support to MSI packages
+ *                  https://community.openvpn.net/openvpn/wiki/OpenVPNMSICA
+ *
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#elif defined(_MSC_VER)
+#include <config-msvc.h>
+#endif
+
+#include "msica_arg.h"
+#include "../tapctl/error.h"
+#include "../tapctl/tap.h"
+
+#include <windows.h>
+#include <malloc.h>
+
+
+void
+msica_arg_seq_init(_Inout_ struct msica_arg_seq *seq)
+{
+    seq->head = NULL;
+    seq->tail = NULL;
+}
+
+
+void
+msica_arg_seq_free(_Inout_ struct msica_arg_seq *seq)
+{
+    while (seq->head)
+    {
+        struct msica_arg *p = seq->head;
+        seq->head = seq->head->next;
+        free(p);
+    }
+    seq->tail = NULL;
+}
+
+
+void
+msica_arg_seq_add_head(
+    _Inout_ struct msica_arg_seq *seq,
+    _In_z_ LPCTSTR argument)
+{
+    size_t argument_size = (_tcslen(argument) + 1) * sizeof(TCHAR);
+    struct msica_arg *p = malloc(sizeof(struct msica_arg) + argument_size);
+    if (p == NULL)
+    {
+        msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, sizeof(struct msica_arg) + argument_size);
+    }
+    memcpy(p->val, argument, argument_size);
+    p->next = seq->head;
+    seq->head = p;
+    if (seq->tail == NULL)
+    {
+        seq->tail = p;
+    }
+}
+
+
+void
+msica_arg_seq_add_tail(
+    _Inout_ struct msica_arg_seq *seq,
+    _Inout_ LPCTSTR argument)
+{
+    size_t argument_size = (_tcslen(argument) + 1) * sizeof(TCHAR);
+    struct msica_arg *p = malloc(sizeof(struct msica_arg) + argument_size);
+    if (p == NULL)
+    {
+        msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, sizeof(struct msica_arg) + argument_size);
+    }
+    memcpy(p->val, argument, argument_size);
+    p->next = NULL;
+    *(seq->tail ? &seq->tail->next : &seq->head) = p;
+    seq->tail = p;
+}
+
+
+LPTSTR
+msica_arg_seq_join(_In_ const struct msica_arg_seq *seq)
+{
+    /* Count required space. */
+    size_t size = 2 /*x + zero-terminator*/;
+    for (struct msica_arg *p = seq->head; p != NULL; p = p->next)
+    {
+        size += _tcslen(p->val) + 1 /*space delimiter|zero-terminator*/;
+    }
+    size *= sizeof(TCHAR);
+
+    /* Allocate. */
+    LPTSTR str = malloc(size);
+    if (str == NULL)
+    {
+        msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, size);
+        return NULL;
+    }
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996) /* Using unsafe string functions: The space in s and termination of p->val has been implicitly verified at the beginning of this function. */
+#endif
+
+    /* Dummy argv[0] (i.e. executable name), for CommandLineToArgvW to work correctly when parsing this string. */
+    _tcscpy(str, TEXT("x"));
+
+    /* Join. */
+    LPTSTR s = str + 1 /*x*/;
+    for (struct msica_arg *p = seq->head; p != NULL; p = p->next)
+    {
+        /* Convert zero-terminator into space delimiter. */
+        s[0] = TEXT(' ');
+        s++;
+        /* Append argument. */
+        _tcscpy(s, p->val);
+        s += _tcslen(p->val);
+    }
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+    return str;
+}