244 lines
7.0 KiB
Diff
244 lines
7.0 KiB
Diff
--- a/tc/Makefile 2019-04-08 12:48:15.425854828 +0530
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+++ b/tc/Makefile 2019-04-08 13:03:17.204741000 +0530
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@@ -54,6 +54,7 @@ TCMODULES += m_bpf.o
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TCMODULES += m_sample.o
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TCMODULES += m_ct.o
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TCMODULES += m_gate.o
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+TCMODULES += m_nssmirred.o
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TCMODULES += p_ip.o
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TCMODULES += p_ip6.o
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TCMODULES += p_icmp.o
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--- /dev/null 1970-01-01 05:30:00.000000000 +0530
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+++ b/tc/m_nssmirred.c 2019-06-19 14:25:51.369793000 +0530
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@@ -0,0 +1,183 @@
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+/*
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+ **************************************************************************
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+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
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+ * Permission to use, copy, modify, and/or distribute this software for
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+ * any purpose with or without fee is hereby granted, provided that the
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+ * above copyright notice and this permission notice appear in all copies.
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+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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+ **************************************************************************
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+ */
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <unistd.h>
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+#include <syslog.h>
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+#include <fcntl.h>
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+#include <sys/socket.h>
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+#include <netinet/in.h>
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+#include <arpa/inet.h>
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+#include <string.h>
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+#include "utils.h"
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+#include "tc_util.h"
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+#include "tc_common.h"
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+#include <linux/tc_act/tc_nssmirred.h>
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+
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+/*
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+ * explain()
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+ * API to print the explaination of nssmirred action statement's
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+ * elements.
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+ */
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+static void explain(void)
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+{
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+ fprintf(stderr, "Usage: nssmirred redirect <dev TO_DEVICENAME fromdev FROM_DEVICENAME> \n");
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+ fprintf(stderr, "where: \n");
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+ fprintf(stderr, "\tTO_DEVICENAME is the devicename to redirect to\n");
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+ fprintf(stderr, "\tFROM_DEVICENAME is the devicename to redirect from\n");
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+}
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+
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+/*
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+ * usage()
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+ * API to show the usage of the nssmirred action.
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+ */
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+static void usage(void)
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+{
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+ explain();
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+ exit(-1);
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+}
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+
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+/*
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+ * parse_nss_mirred()
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+ * Parse and validate the nssmirred action statement.
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+ */
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+static int parse_nss_mirred(struct action_util *a, int *argc_p, char ***argv_p,
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+ int tca_id, struct nlmsghdr *n)
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+{
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+ int idx, argc = *argc_p;
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+ char **argv = *argv_p;
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+ struct tc_nss_mirred p;
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+ struct rtattr *tail;
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+
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+ if (argc < 0) {
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+ fprintf(stderr, "nssmirred bad argument count %d. Try option \"help\"\n", argc);
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+ goto error;
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+ }
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+
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+ if (matches(*argv, "nssmirred")) {
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+ fprintf(stderr, "nssmirred bad argument %s. Try option \"help\"\n", *argv);
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+ goto error;
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+ }
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+
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+ NEXT_ARG();
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+ if (!matches(*argv, "help")) {
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+ usage();
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+ }
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+
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+ if (matches(*argv, "redirect")) {
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+ fprintf(stderr, "nssmirred bad argument %s. Try option \"help\"\n", *argv);
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+ goto error;
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+ }
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+
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+ NEXT_ARG();
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+ if (matches(*argv, "dev")) {
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+ fprintf(stderr, "nssmirred: bad value %s. Try option \"help\"\n", *argv);
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+ goto error;
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+ }
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+
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+ NEXT_ARG();
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+ memset(&p, 0, sizeof(struct tc_nss_mirred));
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+ if ((idx = ll_name_to_index(*argv)) == 0) {
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+ fprintf(stderr, "Cannot find to device \"%s\"\n", *argv);
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+ goto error;
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+ }
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+
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+ p.to_ifindex = idx;
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+ NEXT_ARG();
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+ if (matches(*argv, "fromdev")) {
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+ fprintf(stderr, "nssmirred: bad value %s. Try option \"help\"\n", *argv);
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+ goto error;
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+ }
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+
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+ NEXT_ARG();
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+ if ((idx = ll_name_to_index(*argv)) == 0) {
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+ fprintf(stderr, "Cannot find from device \"%s\"\n", *argv);
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+ goto error;
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+ }
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+
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+ p.from_ifindex = idx;
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+ p.action = TC_ACT_STOLEN;
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+ tail = NLMSG_TAIL(n);
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+ addattr_l(n, MAX_MSG, tca_id, NULL, 0);
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+ addattr_l(n, MAX_MSG, TCA_NSS_MIRRED_PARMS, &p, sizeof (p));
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+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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+ argc--;
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+ argv++;
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+ *argc_p = argc;
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+ *argv_p = argv;
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+ return 0;
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+
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+error:
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+ return -1;
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+}
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+
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+/*
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+ * print_nss_mirred()
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+ * Print information related to nssmirred action.
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+ */
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+static int print_nss_mirred(struct action_util *au, FILE * f, struct rtattr *arg)
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+{
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+ struct tc_nss_mirred *p;
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+ struct rtattr *tb[TCA_NSS_MIRRED_MAX + 1];
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+ const char *from_dev, *to_dev;
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+
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+ if (arg == NULL) {
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+ return -1;
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+ }
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+
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+ parse_rtattr_nested(tb, TCA_NSS_MIRRED_MAX, arg);
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+
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+ if (tb[TCA_NSS_MIRRED_PARMS] == NULL) {
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+ fprintf(f, "[NULL nssmirred parameters]");
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+ goto error;
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+ }
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+
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+ p = RTA_DATA(tb[TCA_NSS_MIRRED_PARMS]);
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+ if ((from_dev = ll_index_to_name(p->from_ifindex)) == 0) {
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+ fprintf(stderr, "Invalid interface (index: %d)\n", p->from_ifindex);
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+ goto error;
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+ }
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+
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+ if ((to_dev = ll_index_to_name(p->to_ifindex)) == 0) {
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+ fprintf(stderr, "Invalid interface (index: %d)\n", p->to_ifindex);
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+ goto error;
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+ }
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+
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+ fprintf(f, "nssmirred (%s to device %s) stolen\n", from_dev, to_dev);
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+ fprintf(f, "\tindex %d ref %d bind %d\n",p->index,p->refcnt,p->bindcnt);
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+
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+ if (show_stats) {
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+ if (tb[TCA_NSS_MIRRED_TM]) {
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+ struct tcf_t *tm = RTA_DATA(tb[TCA_NSS_MIRRED_TM]);
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+ print_tm(f,tm);
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+ }
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+ }
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+ return 0;
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+
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+error:
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+ return -1;
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+}
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+
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+/*
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+ * nssmirred_action_util
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+ * nssmirred action utility structure.
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+ */
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+struct action_util nssmirred_action_util = {
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+ .id = "nssmirred",
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+ .parse_aopt = parse_nss_mirred,
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+ .print_aopt = print_nss_mirred,
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+};
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--- /dev/null 1970-01-01 05:30:00.000000000 +0530
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+++ a/include/linux/tc_act/tc_nssmirred.h 2019-06-19 14:25:40.787768000 +0530
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@@ -0,0 +1,44 @@
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+/*
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+ **************************************************************************
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+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
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+ * Permission to use, copy, modify, and/or distribute this software for
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+ * any purpose with or without fee is hereby granted, provided that the
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+ * above copyright notice and this permission notice appear in all copies.
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+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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+ **************************************************************************
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+ */
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+
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+#ifndef __LINUX_TC_NSS_MIR_H
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+#define __LINUX_TC_NSS_MIR_H
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+
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+#include <linux/types.h>
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+#include <linux/pkt_cls.h>
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+
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+/*
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+ * tc_nss_mirred
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+ * Structure for nssmirred action.
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+ */
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+struct tc_nss_mirred {
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+ tc_gen;
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+ __u32 from_ifindex; /* ifindex of the port to be redirected from */
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+ __u32 to_ifindex; /* ifindex of the port to be redirected to */
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+};
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+
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+/*
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+ * Types of nssmirred action parameters.
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+ */
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+enum {
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+ TCA_NSS_MIRRED_UNSPEC,
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+ TCA_NSS_MIRRED_TM,
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+ TCA_NSS_MIRRED_PARMS,
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+ __TCA_NSS_MIRRED_MAX
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+};
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+#define TCA_NSS_MIRRED_MAX (__TCA_NSS_MIRRED_MAX - 1)
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+
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+#endif /* __LINUX_TC_NSS_MIR_H */
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