contrib/fwd: add utility functions

[project/luci.git] / contrib / fwd / src / fwd_utils.c

diff --git a/contrib/fwd/src/fwd_utils.c b/contrib/fwd/src/fwd_utils.c
new file mode 100644 (file)
index 0000000..170ecf4
--- /dev/null
+++ b/contrib/fwd/src/fwd_utils.c
@@ -0,0 +1,78 @@
+/*
+ * fwd - OpenWrt firewall daemon - commmon utility functions
+ *
+ *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * The fwd 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.
+ *
+ * The fwd 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 the fwd program. If not, see http://www.gnu.org/licenses/.
+ */
+
+
+#include "fwd_utils.h"
+
+
+void fwd_log_init(void)
+{
+       openlog("Firewall", 0, LOG_DAEMON | LOG_PERROR);
+}
+
+void __fwd_log(int prio, const char *msg, ...)
+{
+       va_list ap;
+       va_start(ap, msg);
+       vsyslog(prio, msg, ap);
+       va_end(ap);
+}
+
+
+
+int fwd_empty_cidr(struct fwd_cidr *c)
+{
+       if( (c == NULL) || ((c->addr.s_addr == 0) && (c->prefix == 0)) )
+               return 1;
+
+       return 0;
+}
+
+int fwd_equal_cidr(struct fwd_cidr *a, struct fwd_cidr *b)
+{
+       if( fwd_empty_cidr(a) && fwd_empty_cidr(b) )
+               return 1;
+       else if( (a->addr.s_addr == b->addr.s_addr) && (a->prefix == b->prefix) )
+               return 1;
+
+       return 0;
+}
+
+void fwd_update_cidr(struct fwd_cidr *a, struct fwd_cidr *b)
+{
+       if( a != NULL )
+       {
+               a->addr.s_addr = b ? b->addr.s_addr : 0;
+               a->prefix = b ? b->prefix : 0;
+       }
+}
+
+
+/* fwd_zmalloc(size_t)
+ * Allocates a zeroed buffer of the given size. */
+void * fwd_zmalloc(size_t s)
+{
+       void *b = malloc(s);
+
+       if( b != NULL )
+               memset(b, 0, s);
+
+       return b;
+}
+
+