1 /* SPDX-License-Identifier: GPL-2.0 */
3 * f_tcindex.c Traffic control index filter
5 * Written 1998,1999 by Werner Almesberger
13 #include <netinet/in.h>
18 static void explain(void)
21 " Usage: ... tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ]\n"
22 " [ pass_on | fall_through ]\n"
23 " [ classid CLASSID ] [ action ACTION_SPEC ]\n");
26 static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc,
27 char **argv, struct nlmsghdr *n)
29 struct tcmsg *t = NLMSG_DATA(n);
34 t->tcm_handle = strtoul(handle, &end, 0);
36 fprintf(stderr, "Illegal filter ID\n");
41 tail = addattr_nest(n, 4096, TCA_OPTIONS);
43 if (!strcmp(*argv, "hash")) {
47 hash = strtoul(*argv, &end, 0);
48 if (*end || !hash || hash > 0x10000) {
52 addattr_l(n, 4096, TCA_TCINDEX_HASH, &hash,
54 } else if (!strcmp(*argv,"mask")) {
58 mask = strtoul(*argv, &end, 0);
63 addattr_l(n, 4096, TCA_TCINDEX_MASK, &mask,
65 } else if (!strcmp(*argv,"shift")) {
69 shift = strtoul(*argv, &end, 0);
74 addattr_l(n, 4096, TCA_TCINDEX_SHIFT, &shift,
76 } else if (!strcmp(*argv,"fall_through")) {
79 addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value,
81 } else if (!strcmp(*argv,"pass_on")) {
84 addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value,
86 } else if (!strcmp(*argv,"classid")) {
90 if (get_tc_classid(&handle, *argv)) {
91 fprintf(stderr, "Illegal \"classid\"\n");
94 addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4);
95 } else if (!strcmp(*argv,"police")) {
97 if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) {
98 fprintf(stderr, "Illegal \"police\"\n");
102 } else if (!strcmp(*argv,"action")) {
104 if (parse_action(&argc, &argv, TCA_TCINDEX_ACT, n)) {
105 fprintf(stderr, "Illegal \"action\"\n");
116 addattr_nest_end(n, tail);
121 static int tcindex_print_opt(struct filter_util *qu, FILE *f,
122 struct rtattr *opt, __u32 handle)
124 struct rtattr *tb[TCA_TCINDEX_MAX+1];
129 parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt);
131 if (handle != ~0) fprintf(f, "handle 0x%04x ", handle);
132 if (tb[TCA_TCINDEX_HASH]) {
135 if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash))
137 hash = rta_getattr_u16(tb[TCA_TCINDEX_HASH]);
138 fprintf(f, "hash %d ", hash);
140 if (tb[TCA_TCINDEX_MASK]) {
143 if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask))
145 mask = rta_getattr_u16(tb[TCA_TCINDEX_MASK]);
146 fprintf(f, "mask 0x%04x ", mask);
148 if (tb[TCA_TCINDEX_SHIFT]) {
151 if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift))
153 shift = rta_getattr_u32(tb[TCA_TCINDEX_SHIFT]);
154 fprintf(f, "shift %d ", shift);
156 if (tb[TCA_TCINDEX_FALL_THROUGH]) {
159 if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) <
160 sizeof(fall_through))
162 fall_through = rta_getattr_u32(tb[TCA_TCINDEX_FALL_THROUGH]);
163 fprintf(f, fall_through ? "fall_through " : "pass_on ");
165 if (tb[TCA_TCINDEX_CLASSID]) {
167 fprintf(f, "classid %s ", sprint_tc_classid(*(__u32 *)
168 RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1));
170 if (tb[TCA_TCINDEX_POLICE]) {
172 tc_print_police(f, tb[TCA_TCINDEX_POLICE]);
174 if (tb[TCA_TCINDEX_ACT]) {
176 tc_print_action(f, tb[TCA_TCINDEX_ACT], 0);
181 struct filter_util tcindex_filter_util = {
183 .parse_fopt = tcindex_parse_opt,
184 .print_fopt = tcindex_print_opt,