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-rw-r--r--src/openvpn/argv.c315
1 files changed, 315 insertions, 0 deletions
diff --git a/src/openvpn/argv.c b/src/openvpn/argv.c
new file mode 100644
index 0000000..596e59c
--- /dev/null
+++ b/src/openvpn/argv.c
@@ -0,0 +1,315 @@
+/*
+ * OpenVPN -- An application to securely tunnel IP networks
+ * over a single TCP/UDP port, with support for SSL/TLS-based
+ * session authentication and key exchange,
+ * packet encryption, packet authentication, and
+ * packet compression.
+ *
+ * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ * 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 (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * A printf-like function (that only recognizes a subset of standard printf
+ * format operators) that prints arguments to an argv list instead
+ * of a standard string. This is used to build up argv arrays for passing
+ * to execve.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#elif defined(_MSC_VER)
+#include "config-msvc.h"
+#endif
+
+#include "syshead.h"
+
+#include "argv.h"
+#include "options.h"
+
+static void
+argv_init (struct argv *a)
+{
+ a->capacity = 0;
+ a->argc = 0;
+ a->argv = NULL;
+}
+
+struct argv
+argv_new (void)
+{
+ struct argv ret;
+ argv_init (&ret);
+ return ret;
+}
+
+void
+argv_reset (struct argv *a)
+{
+ size_t i;
+ for (i = 0; i < a->argc; ++i)
+ free (a->argv[i]);
+ free (a->argv);
+ argv_init (a);
+}
+
+static void
+argv_extend (struct argv *a, const size_t newcap)
+{
+ if (newcap > a->capacity)
+ {
+ char **newargv;
+ size_t i;
+ ALLOC_ARRAY_CLEAR (newargv, char *, newcap);
+ for (i = 0; i < a->argc; ++i)
+ newargv[i] = a->argv[i];
+ free (a->argv);
+ a->argv = newargv;
+ a->capacity = newcap;
+ }
+}
+
+static void
+argv_grow (struct argv *a, const size_t add)
+{
+ const size_t newargc = a->argc + add + 1;
+ ASSERT (newargc > a->argc);
+ argv_extend (a, adjust_power_of_2 (newargc));
+}
+
+static void
+argv_append (struct argv *a, char *str) /* str must have been malloced or be NULL */
+{
+ argv_grow (a, 1);
+ a->argv[a->argc++] = str;
+}
+
+static struct argv
+argv_clone (const struct argv *a, const size_t headroom)
+{
+ struct argv r;
+ size_t i;
+
+ argv_init (&r);
+ for (i = 0; i < headroom; ++i)
+ argv_append (&r, NULL);
+ if (a)
+ {
+ for (i = 0; i < a->argc; ++i)
+ argv_append (&r, string_alloc (a->argv[i], NULL));
+ }
+ return r;
+}
+
+struct argv
+argv_insert_head (const struct argv *a, const char *head)
+{
+ struct argv r;
+ r = argv_clone (a, 1);
+ r.argv[0] = string_alloc (head, NULL);
+ return r;
+}
+
+static char *
+argv_term (const char **f)
+{
+ const char *p = *f;
+ const char *term = NULL;
+ size_t termlen = 0;
+
+ if (*p == '\0')
+ return NULL;
+
+ while (true)
+ {
+ const int c = *p;
+ if (c == '\0')
+ break;
+ if (term)
+ {
+ if (!isspace (c))
+ ++termlen;
+ else
+ break;
+ }
+ else
+ {
+ if (!isspace (c))
+ {
+ term = p;
+ termlen = 1;
+ }
+ }
+ ++p;
+ }
+ *f = p;
+
+ if (term)
+ {
+ char *ret;
+ ASSERT (termlen > 0);
+ ret = malloc (termlen + 1);
+ check_malloc_return (ret);
+ memcpy (ret, term, termlen);
+ ret[termlen] = '\0';
+ return ret;
+ }
+ else
+ return NULL;
+}
+
+const char *
+argv_str (const struct argv *a, struct gc_arena *gc, const unsigned int flags)
+{
+ if (a->argv)
+ return print_argv ((const char **)a->argv, gc, flags);
+ else
+ return "";
+}
+
+void
+argv_msg (const int msglev, const struct argv *a)
+{
+ struct gc_arena gc = gc_new ();
+ msg (msglev, "%s", argv_str (a, &gc, 0));
+ gc_free (&gc);
+}
+
+void
+argv_msg_prefix (const int msglev, const struct argv *a, const char *prefix)
+{
+ struct gc_arena gc = gc_new ();
+ msg (msglev, "%s: %s", prefix, argv_str (a, &gc, 0));
+ gc_free (&gc);
+}
+
+static void
+argv_printf_arglist (struct argv *a, const char *format, va_list arglist)
+{
+ char *term;
+ const char *f = format;
+
+ argv_extend (a, 1); /* ensure trailing NULL */
+
+ while ((term = argv_term (&f)) != NULL)
+ {
+ if (term[0] == '%')
+ {
+ if (!strcmp (term, "%s"))
+ {
+ char *s = va_arg (arglist, char *);
+ if (!s)
+ s = "";
+ argv_append (a, string_alloc (s, NULL));
+ }
+ else if (!strcmp (term, "%d"))
+ {
+ char numstr[64];
+ openvpn_snprintf (numstr, sizeof (numstr), "%d", va_arg (arglist, int));
+ argv_append (a, string_alloc (numstr, NULL));
+ }
+ else if (!strcmp (term, "%u"))
+ {
+ char numstr[64];
+ openvpn_snprintf (numstr, sizeof (numstr), "%u", va_arg (arglist, unsigned int));
+ argv_append (a, string_alloc (numstr, NULL));
+ }
+ else if (!strcmp (term, "%s/%d"))
+ {
+ char numstr[64];
+ char *s = va_arg (arglist, char *);
+
+ if (!s)
+ s = "";
+
+ openvpn_snprintf (numstr, sizeof (numstr), "%d", va_arg (arglist, int));
+
+ {
+ const size_t len = strlen(s) + strlen(numstr) + 2;
+ char *combined = (char *) malloc (len);
+ check_malloc_return (combined);
+
+ strcpy (combined, s);
+ strcat (combined, "/");
+ strcat (combined, numstr);
+ argv_append (a, combined);
+ }
+ }
+ else if (!strcmp (term, "%s%sc"))
+ {
+ char *s1 = va_arg (arglist, char *);
+ char *s2 = va_arg (arglist, char *);
+ char *combined;
+
+ if (!s1) s1 = "";
+ if (!s2) s2 = "";
+ combined = (char *) malloc (strlen(s1) + strlen(s2) + 1);
+ check_malloc_return (combined);
+ strcpy (combined, s1);
+ strcat (combined, s2);
+ argv_append (a, combined);
+ }
+ else
+ ASSERT (0);
+ free (term);
+ }
+ else
+ {
+ argv_append (a, term);
+ }
+ }
+}
+
+void
+argv_printf (struct argv *a, const char *format, ...)
+{
+ va_list arglist;
+ argv_reset (a);
+ va_start (arglist, format);
+ argv_printf_arglist (a, format, arglist);
+ va_end (arglist);
+ }
+
+void
+argv_printf_cat (struct argv *a, const char *format, ...)
+{
+ va_list arglist;
+ va_start (arglist, format);
+ argv_printf_arglist (a, format, arglist);
+ va_end (arglist);
+}
+
+void
+argv_parse_cmd (struct argv *a, const char *s)
+{
+ int nparms;
+ char *parms[MAX_PARMS + 1];
+ struct gc_arena gc = gc_new ();
+
+ argv_reset (a);
+ argv_extend (a, 1); /* ensure trailing NULL */
+
+ nparms = parse_line (s, parms, MAX_PARMS, "SCRIPT-ARGV", 0, D_ARGV_PARSE_CMD, &gc);
+ if (nparms)
+ {
+ int i;
+ for (i = 0; i < nparms; ++i)
+ argv_append (a, string_alloc (parms[i], NULL));
+ }
+ else
+ argv_append (a, string_alloc (s, NULL));
+
+ gc_free (&gc);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 10:42:30 +0000