+/*
+ * m_gact.c generic actions module
+ *
+ * This program is free software; you can distribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: J Hadi Salim (hadi@cyberus.ca)
+ *
+ */
+
+#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"
+#include <linux/tc_act/tc_gact.h>
+
+/* define to turn on probablity stuff */
+
+#ifdef CONFIG_GACT_PROB
+static const char *prob_n2a(int p)
+{
+ if (p == PGACT_NONE)
+ return "none";
+ if (p == PGACT_NETRAND)
+ return "netrand";
+ if (p == PGACT_DETERM)
+ return "determ";
+ return "none";
+}
+#endif
+
+static void
+explain(void)
+{
+#ifdef CONFIG_GACT_PROB
+ fprintf(stderr, "Usage: ... gact <ACTION> [RAND] [INDEX]\n");
+ fprintf(stderr,
+ "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n"
+ " \t goto chain <CHAIN_INDEX> | jump <JUMP_COUNT>\n"
+ "\tRAND := random <RANDTYPE> <ACTION> <VAL>\n"
+ "\tRANDTYPE := netrand | determ\n"
+ "\tVAL : = value not exceeding 10000\n"
+ "\tJUMP_COUNT := Absolute jump from start of action list\n"
+ "\tINDEX := index value used\n"
+ "\n");
+#else
+ fprintf(stderr, "Usage: ... gact <ACTION> [INDEX]\n"
+ "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n"
+ " \t goto chain <CHAIN_INDEX> | jump <JUMP_COUNT>\n"
+ "\tINDEX := index value used\n"
+ "\tJUMP_COUNT := Absolute jump from start of action list\n"
+ "\n");
+#endif
+}
+
+
+static void
+usage(void)
+{
+ explain();
+ exit(-1);
+}
+
+static int
+parse_gact(struct action_util *a, int *argc_p, char ***argv_p,
+ int tca_id, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ struct tc_gact p = { 0 };
+#ifdef CONFIG_GACT_PROB
+ int rd = 0;
+ struct tc_gact_p pp;
+#endif
+ struct rtattr *tail;
+
+ if (argc < 0)
+ return -1;
+
+ if (!matches(*argv, "gact"))
+ NEXT_ARG();
+ /* we're binding existing gact action to filter by index. */
+ if (!matches(*argv, "index"))
+ goto skip_args;
+ if (parse_action_control(&argc, &argv, &p.action, false))
+ usage(); /* does not return */
+
+#ifdef CONFIG_GACT_PROB
+ if (argc > 0) {
+ if (matches(*argv, "random") == 0) {
+ rd = 1;
+ NEXT_ARG();
+ if (matches(*argv, "netrand") == 0) {
+ NEXT_ARG();
+ pp.ptype = PGACT_NETRAND;
+ } else if (matches(*argv, "determ") == 0) {
+ NEXT_ARG();
+ pp.ptype = PGACT_DETERM;
+ } else {
+ fprintf(stderr, "Illegal \"random type\"\n");
+ return -1;
+ }
+
+ if (parse_action_control(&argc, &argv,
+ &pp.paction, false) == -1)
+ usage();
+ if (get_u16(&pp.pval, *argv, 10)) {
+ fprintf(stderr,
+ "Illegal probability val 0x%x\n",
+ pp.pval);
+ return -1;
+ }
+ if (pp.pval > 10000) {
+ fprintf(stderr,
+ "Illegal probability val 0x%x\n",
+ pp.pval);
+ return -1;
+ }
+ argc--;
+ argv++;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ }
+ }
+#endif
+
+ if (argc > 0) {
+ if (matches(*argv, "index") == 0) {
+skip_args:
+ NEXT_ARG();
+ if (get_u32(&p.index, *argv, 10)) {
+ fprintf(stderr, "Illegal \"index\"\n");
+ return -1;
+ }
+ argc--;
+ argv++;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ }
+ }
+
+ tail = addattr_nest(n, MAX_MSG, tca_id);
+ addattr_l(n, MAX_MSG, TCA_GACT_PARMS, &p, sizeof(p));
+#ifdef CONFIG_GACT_PROB
+ if (rd)
+ addattr_l(n, MAX_MSG, TCA_GACT_PROB, &pp, sizeof(pp));
+#endif
+ addattr_nest_end(n, tail);
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static int
+print_gact(struct action_util *au, FILE *f, struct rtattr *arg)
+{
+#ifdef CONFIG_GACT_PROB
+ struct tc_gact_p *pp = NULL;
+ struct tc_gact_p pp_dummy;
+#endif
+ struct tc_gact *p = NULL;
+ struct rtattr *tb[TCA_GACT_MAX + 1];
+
+ if (arg == NULL)
+ return -1;
+
+ parse_rtattr_nested(tb, TCA_GACT_MAX, arg);
+
+ if (tb[TCA_GACT_PARMS] == NULL) {
+ fprintf(stderr, "Missing gact parameters\n");
+ return -1;
+ }
+ p = RTA_DATA(tb[TCA_GACT_PARMS]);
+
+ print_string(PRINT_ANY, "kind", "%s ", "gact");
+ print_action_control(f, "action ", p->action, "");
+#ifdef CONFIG_GACT_PROB
+ if (tb[TCA_GACT_PROB] != NULL) {
+ pp = RTA_DATA(tb[TCA_GACT_PROB]);
+ } else {
+ /* need to keep consistent output */
+ memset(&pp_dummy, 0, sizeof(pp_dummy));
+ pp = &pp_dummy;
+ }
+ open_json_object("prob");
+ print_nl();
+ print_string(PRINT_ANY, "random_type", "\t random type %s",
+ prob_n2a(pp->ptype));
+ print_action_control(f, " ", pp->paction, " ");
+ print_int(PRINT_ANY, "val", "val %d", pp->pval);
+ close_json_object();
+#endif
+ print_nl();
+ print_uint(PRINT_ANY, "index", "\t index %u", p->index);
+ print_int(PRINT_ANY, "ref", " ref %d", p->refcnt);
+ print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt);
+ if (show_stats) {
+ if (tb[TCA_GACT_TM]) {
+ struct tcf_t *tm = RTA_DATA(tb[TCA_GACT_TM]);
+
+ print_tm(f, tm);
+ }
+ }
+ print_nl();
+ return 0;
+}
+
+struct action_util gact_action_util = {
+ .id = "gact",
+ .parse_aopt = parse_gact,
+ .print_aopt = print_gact,
+};
projects / mirror_iproute2.git / blobdiff