1 files changed, 115 insertions, 0 deletions
diff --git a/tc/tc_monitor.c b/tc/tc_monitor.c
new file mode 100644
index 0000000..5b9bccb
--- /dev/null
+++ b/tc/tc_monitor.c
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * tc_monitor.c		"tc monitor".
+ *
+ * Authors:	Jamal Hadi Salim
+ */
+
+#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 <time.h>
+#include "rt_names.h"
+#include "utils.h"
+#include "tc_util.h"
+#include "tc_common.h"
+
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+	fprintf(stderr, "Usage: tc [-timestamp [-tshort] monitor\n");
+	exit(-1);
+}
+
+
+static int accept_tcmsg(struct rtnl_ctrl_data *ctrl,
+			struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = (FILE *)arg;
+
+	if (timestamp)
+		print_timestamp(fp);
+
+	if (n->nlmsg_type == RTM_NEWTFILTER ||
+	    n->nlmsg_type == RTM_DELTFILTER ||
+	    n->nlmsg_type == RTM_NEWCHAIN ||
+	    n->nlmsg_type == RTM_DELCHAIN) {
+		print_filter(n, arg);
+		return 0;
+	}
+	if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) {
+		print_class(n, arg);
+		return 0;
+	}
+	if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) {
+		print_qdisc(n, arg);
+		return 0;
+	}
+	if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION ||
+	    n->nlmsg_type == RTM_DELACTION) {
+		print_action(n, arg);
+		return 0;
+	}
+	if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
+	    n->nlmsg_type != NLMSG_DONE) {
+		fprintf(stderr, "Unknown message: length %08d type %08x flags %08x\n",
+			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+	}
+	return 0;
+}
+
+int do_tcmonitor(int argc, char **argv)
+{
+	struct rtnl_handle rth;
+	char *file = NULL;
+	unsigned int groups = nl_mgrp(RTNLGRP_TC);
+
+	while (argc > 0) {
+		if (matches(*argv, "file") == 0) {
+			NEXT_ARG();
+			file = *argv;
+		} else {
+			if (matches(*argv, "help") == 0) {
+				usage();
+			} else {
+				fprintf(stderr, "Argument \"%s\" is unknown, try \"tc monitor help\".\n", *argv);
+				exit(-1);
+			}
+		}
+		argc--;	argv++;
+	}
+
+	if (file) {
+		FILE *fp = fopen(file, "r");
+		int ret;
+
+		if (fp == NULL) {
+			perror("Cannot fopen");
+			exit(-1);
+		}
+
+		ret = rtnl_from_file(fp, accept_tcmsg, stdout);
+		fclose(fp);
+		return ret;
+	}
+
+	if (rtnl_open(&rth, groups) < 0)
+		exit(1);
+
+	ll_init_map(&rth);
+
+	if (rtnl_listen(&rth, accept_tcmsg, (void *)stdout) < 0) {
+		rtnl_close(&rth);
+		exit(2);
+	}
+
+	rtnl_close(&rth);
+	exit(0);
+}