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-rw-r--r--tc/f_route.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/tc/f_route.c b/tc/f_route.c
new file mode 100644
index 0000000..ca8a8dd
--- /dev/null
+++ b/tc/f_route.c
@@ -0,0 +1,178 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * f_route.c ROUTE filter.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#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 "rt_names.h"
+#include "tc_common.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n"
+ " [ classid CLASSID ] [ action ACTION_SPEC ]\n"
+ " ACTION_SPEC := ... look at individual actions\n"
+ " CLASSID := X:Y\n"
+ "\n"
+ "NOTE: CLASSID is parsed as hexadecimal input.\n");
+}
+
+static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
+{
+ struct tcmsg *t = NLMSG_DATA(n);
+ struct rtattr *tail;
+ __u32 fh = 0xFFFF8000;
+ __u32 order = 0;
+
+ if (handle) {
+ if (get_u32(&t->tcm_handle, handle, 0)) {
+ fprintf(stderr, "Illegal \"handle\"\n");
+ return -1;
+ }
+ }
+
+ if (argc == 0)
+ return 0;
+
+ tail = addattr_nest(n, 4096, TCA_OPTIONS);
+
+ while (argc > 0) {
+ if (matches(*argv, "to") == 0) {
+ __u32 id;
+
+ NEXT_ARG();
+ if (rtnl_rtrealm_a2n(&id, *argv)) {
+ fprintf(stderr, "Illegal \"to\"\n");
+ return -1;
+ }
+ addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4);
+ fh &= ~0x80FF;
+ fh |= id&0xFF;
+ } else if (matches(*argv, "from") == 0) {
+ __u32 id;
+
+ NEXT_ARG();
+ if (rtnl_rtrealm_a2n(&id, *argv)) {
+ fprintf(stderr, "Illegal \"from\"\n");
+ return -1;
+ }
+ addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4);
+ fh &= 0xFFFF;
+ fh |= id<<16;
+ } else if (matches(*argv, "fromif") == 0) {
+ __u32 id;
+
+ NEXT_ARG();
+ ll_init_map(&rth);
+ if ((id = ll_name_to_index(*argv)) <= 0) {
+ fprintf(stderr, "Illegal \"fromif\"\n");
+ return -1;
+ }
+ addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4);
+ fh &= 0xFFFF;
+ fh |= (0x8000|id)<<16;
+ } else if (matches(*argv, "classid") == 0 ||
+ strcmp(*argv, "flowid") == 0) {
+ unsigned int classid;
+
+ NEXT_ARG();
+ if (get_tc_classid(&classid, *argv)) {
+ fprintf(stderr, "Illegal \"classid\"\n");
+ return -1;
+ }
+ addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &classid, 4);
+ } else if (matches(*argv, "police") == 0) {
+ NEXT_ARG();
+ if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) {
+ fprintf(stderr, "Illegal \"police\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "action") == 0) {
+ NEXT_ARG();
+ if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) {
+ fprintf(stderr, "Illegal \"action\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "order") == 0) {
+ NEXT_ARG();
+ if (get_u32(&order, *argv, 0)) {
+ fprintf(stderr, "Illegal \"order\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+ addattr_nest_end(n, tail);
+ if (order) {
+ fh &= ~0x7F00;
+ fh |= (order<<8)&0x7F00;
+ }
+ if (!t->tcm_handle)
+ t->tcm_handle = fh;
+ return 0;
+}
+
+static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
+{
+ struct rtattr *tb[TCA_ROUTE4_MAX+1];
+
+ SPRINT_BUF(b1);
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt);
+
+ if (handle)
+ print_0xhex(PRINT_ANY, "fh", "fh 0x%08x ", handle);
+ if (handle&0x7F00)
+ print_uint(PRINT_ANY, "order", "order %d ", (handle >> 8) & 0x7F);
+
+ if (tb[TCA_ROUTE4_CLASSID]) {
+ SPRINT_BUF(b1);
+ print_string(PRINT_ANY, "flowid", "flowid %s ",
+ sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1));
+ }
+ if (tb[TCA_ROUTE4_TO])
+ print_string(PRINT_ANY, "name", "to %s ",
+ rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1)));
+ if (tb[TCA_ROUTE4_FROM])
+ print_string(PRINT_ANY, "name", "from %s ",
+ rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1)));
+ if (tb[TCA_ROUTE4_IIF])
+ print_color_string(PRINT_ANY, COLOR_IFNAME, "fromif", "fromif %s",
+ ll_index_to_name(rta_getattr_u32(tb[TCA_ROUTE4_IIF])));
+ if (tb[TCA_ROUTE4_POLICE])
+ tc_print_police(f, tb[TCA_ROUTE4_POLICE]);
+ if (tb[TCA_ROUTE4_ACT])
+ tc_print_action(f, tb[TCA_ROUTE4_ACT], 0);
+ return 0;
+}
+
+struct filter_util route_filter_util = {
+ .id = "route",
+ .parse_fopt = route_parse_opt,
+ .print_fopt = route_print_opt,
+};