1 files changed, 77 insertions, 0 deletions
diff --git a/usr.bin/sockstat/sockstat.c b/usr.bin/sockstat/sockstat.c
new file mode 100644
index 000000000000..7bb7f6a66e3f
--- /dev/null
+++ b/usr.bin/sockstat/sockstat.c
@@ -0,0 +1,77 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 ConnectWise
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <libxo/xo.h>
+
+#include "sockstat.h"
+
+int	*ports;
+
+int
+parse_ports(const char *portspec)
+{
+	const char *p;
+
+	if (ports == NULL)
+		if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
+			xo_err(1, "calloc()");
+	p = portspec;
+	while (*p != '\0') {
+		long port, end;
+		char *endptr = NULL;
+
+		errno = 0;
+		port = strtol(p, &endptr, 10);
+		if (errno)
+			return (errno);
+		if (port < 0 || port > 65535)
+			return (ERANGE);
+		SET_PORT(port);
+		switch (*endptr) {
+		case '-':
+			p = endptr + 1;
+			end = strtol(p, &endptr, 10);
+			break;
+		case ',':
+			p = endptr + 1;
+			continue;
+		default:
+			p = endptr;
+			continue;
+		}
+		if (errno)
+			return (errno);
+		if (end < port || end > 65535)
+			return (ERANGE);
+		while (port++ < end)
+			SET_PORT(port);
+	}
+	return (0);
+}