1 files changed, 114 insertions, 0 deletions
diff --git a/tc/q_drr.c b/tc/q_drr.c
new file mode 100644
index 0000000..03c4744
--- /dev/null
+++ b/tc/q_drr.c
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * q_drr.c		DRR.
+ *
+ * Authors:	Patrick McHardy <kaber@trash.net>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+	fprintf(stderr, "Usage: ... drr\n");
+}
+
+static void explain2(void)
+{
+	fprintf(stderr, "Usage: ... drr quantum SIZE\n");
+}
+
+
+static int drr_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+			 struct nlmsghdr *n, const char *dev)
+{
+	while (argc) {
+		if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain();
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static int drr_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
+			       struct nlmsghdr *n, const char *dev)
+{
+	struct rtattr *tail;
+	__u32 tmp;
+
+	tail = addattr_nest(n, 1024, TCA_OPTIONS);
+
+	while (argc > 0) {
+		if (strcmp(*argv, "quantum") == 0) {
+			NEXT_ARG();
+			if (get_size(&tmp, *argv)) {
+				fprintf(stderr, "Illegal \"quantum\"\n");
+				return -1;
+			}
+			addattr_l(n, 1024, TCA_DRR_QUANTUM, &tmp, sizeof(tmp));
+		} else if (strcmp(*argv, "help") == 0) {
+			explain2();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain2();
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	addattr_nest_end(n, tail);
+	return 0;
+}
+
+static int drr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+	struct rtattr *tb[TCA_DRR_MAX + 1];
+
+	if (opt == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_DRR_MAX, opt);
+
+	if (tb[TCA_DRR_QUANTUM])
+		print_size(PRINT_FP, NULL, "quantum %s ",
+			   rta_getattr_u32(tb[TCA_DRR_QUANTUM]));
+	return 0;
+}
+
+static int drr_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
+{
+	struct tc_drr_stats *x;
+
+	if (xstats == NULL)
+		return 0;
+	if (RTA_PAYLOAD(xstats) < sizeof(*x))
+		return -1;
+	x = RTA_DATA(xstats);
+
+	print_size(PRINT_FP, NULL, " deficit %s ", x->deficit);
+	return 0;
+}
+
+struct qdisc_util drr_qdisc_util = {
+	.id		= "drr",
+	.parse_qopt	= drr_parse_opt,
+	.print_qopt	= drr_print_opt,
+	.print_xstats	= drr_print_xstats,
+	.parse_copt	= drr_parse_class_opt,
+	.print_copt	= drr_print_opt,
+};