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-rw-r--r--tc/m_action.c911
1 files changed, 911 insertions, 0 deletions
diff --git a/tc/m_action.c b/tc/m_action.c
new file mode 100644
index 0000000..b3fd019
--- /dev/null
+++ b/tc/m_action.c
@@ -0,0 +1,911 @@
+/*
+ * m_action.c Action Management
+ *
+ * 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)
+ *
+ * TODO:
+ * - parse to be passed a filedescriptor for logging purposes
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <dlfcn.h>
+
+#include "utils.h"
+#include "tc_common.h"
+#include "tc_util.h"
+
+static struct action_util *action_list;
+#ifdef CONFIG_GACT
+static int gact_ld; /* f*ckin backward compatibility */
+#endif
+static int tab_flush;
+
+static void act_usage(void)
+{
+ /*XXX: In the near future add a action->print_help to improve
+ * usability
+ * This would mean new tc will not be backward compatible
+ * with any action .so from the old days. But if someone really
+ * does that, they would know how to fix this ..
+ *
+ */
+ fprintf(stderr,
+ "usage: tc actions <ACTSPECOP>*\n"
+ "Where: ACTSPECOP := ACR | GD | FL\n"
+ " ACR := add | change | replace <ACTSPEC>*\n"
+ " GD := get | delete | <ACTISPEC>*\n"
+ " FL := ls | list | flush | <ACTNAMESPEC>\n"
+ " ACTNAMESPEC := action <ACTNAME>\n"
+ " ACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
+ " ACTSPEC := action <ACTDETAIL> [INDEXSPEC] [HWSTATSSPEC] [SKIPSPEC]\n"
+ " INDEXSPEC := index <32 bit indexvalue>\n"
+ " HWSTATSSPEC := hw_stats [ immediate | delayed | disabled ]\n"
+ " SKIPSPEC := [ skip_sw | skip_hw ]\n"
+ " ACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
+ " Example ACTNAME is gact, mirred, bpf, etc\n"
+ " Each action has its own parameters (ACTPARAMS)\n"
+ "\n");
+
+ exit(-1);
+}
+
+static int print_noaopt(struct action_util *au, FILE *f, struct rtattr *opt)
+{
+ if (opt && RTA_PAYLOAD(opt))
+ fprintf(f, "[Unknown action, optlen=%u] ",
+ (unsigned int) RTA_PAYLOAD(opt));
+ return 0;
+}
+
+static int parse_noaopt(struct action_util *au, int *argc_p,
+ char ***argv_p, int code, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc)
+ fprintf(stderr,
+ "Unknown action \"%s\", hence option \"%s\" is unparsable\n",
+ au->id, *argv);
+ else
+ fprintf(stderr, "Unknown action \"%s\"\n", au->id);
+
+ return -1;
+}
+
+static struct action_util *get_action_kind(char *str)
+{
+ static void *aBODY;
+ void *dlh;
+ char buf[256];
+ struct action_util *a;
+#ifdef CONFIG_GACT
+ int looked4gact = 0;
+restart_s:
+#endif
+ for (a = action_list; a; a = a->next) {
+ if (strcmp(a->id, str) == 0)
+ return a;
+ }
+
+ snprintf(buf, sizeof(buf), "%s/m_%s.so", get_tc_lib(), str);
+ dlh = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);
+ if (dlh == NULL) {
+ dlh = aBODY;
+ if (dlh == NULL) {
+ dlh = aBODY = dlopen(NULL, RTLD_LAZY);
+ if (dlh == NULL)
+ goto noexist;
+ }
+ }
+
+ snprintf(buf, sizeof(buf), "%s_action_util", str);
+ a = dlsym(dlh, buf);
+ if (a == NULL)
+ goto noexist;
+
+reg:
+ a->next = action_list;
+ action_list = a;
+ return a;
+
+noexist:
+#ifdef CONFIG_GACT
+ if (!looked4gact) {
+ looked4gact = 1;
+ strcpy(str, "gact");
+ goto restart_s;
+ }
+#endif
+ a = calloc(1, sizeof(*a));
+ if (a) {
+ strncpy(a->id, "noact", 15);
+ a->parse_aopt = parse_noaopt;
+ a->print_aopt = print_noaopt;
+ goto reg;
+ }
+ return a;
+}
+
+static bool
+new_cmd(char **argv)
+{
+ return (matches(*argv, "change") == 0) ||
+ (matches(*argv, "replace") == 0) ||
+ (matches(*argv, "delete") == 0) ||
+ (matches(*argv, "get") == 0) ||
+ (matches(*argv, "add") == 0);
+}
+
+static const struct hw_stats_item {
+ const char *str;
+ __u8 type;
+} hw_stats_items[] = {
+ { "immediate", TCA_ACT_HW_STATS_IMMEDIATE },
+ { "delayed", TCA_ACT_HW_STATS_DELAYED },
+ { "disabled", 0 }, /* no bit set */
+};
+
+static void print_hw_stats(const struct rtattr *arg, bool print_used)
+{
+ struct nla_bitfield32 *hw_stats_bf = RTA_DATA(arg);
+ __u8 hw_stats;
+ int i;
+
+ hw_stats = hw_stats_bf->value & hw_stats_bf->selector;
+ print_string(PRINT_FP, NULL, "\t", NULL);
+ open_json_array(PRINT_ANY, print_used ? "used_hw_stats" : "hw_stats");
+
+ for (i = 0; i < ARRAY_SIZE(hw_stats_items); i++) {
+ const struct hw_stats_item *item;
+
+ item = &hw_stats_items[i];
+ if ((!hw_stats && !item->type) || hw_stats & item->type)
+ print_string(PRINT_ANY, NULL, " %s", item->str);
+ }
+ close_json_array(PRINT_JSON, NULL);
+ print_nl();
+}
+
+static int parse_hw_stats(const char *str, struct nlmsghdr *n)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hw_stats_items); i++) {
+ const struct hw_stats_item *item;
+
+ item = &hw_stats_items[i];
+ if (matches(str, item->str) == 0) {
+ struct nla_bitfield32 hw_stats_bf = {
+ .value = item->type,
+ .selector = item->type
+ };
+
+ addattr_l(n, MAX_MSG, TCA_ACT_HW_STATS,
+ &hw_stats_bf, sizeof(hw_stats_bf));
+ return 0;
+ }
+
+ }
+ return -1;
+}
+
+int parse_action(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ struct rtattr *tail, *tail2;
+ char k[FILTER_NAMESZ];
+ int act_ck_len = 0;
+ int ok = 0;
+ int eap = 0; /* expect action parameters */
+
+ int ret = 0;
+ int prio = 0;
+ unsigned char act_ck[TC_COOKIE_MAX_SIZE];
+
+ if (argc <= 0)
+ return -1;
+
+ tail2 = addattr_nest(n, MAX_MSG, tca_id);
+
+ while (argc > 0) {
+
+ memset(k, 0, sizeof(k));
+
+ if (strcmp(*argv, "action") == 0) {
+ argc--;
+ argv++;
+ eap = 1;
+#ifdef CONFIG_GACT
+ if (!gact_ld)
+ get_action_kind("gact");
+#endif
+ continue;
+ } else if (strcmp(*argv, "flowid") == 0) {
+ break;
+ } else if (strcmp(*argv, "classid") == 0) {
+ break;
+ } else if (strcmp(*argv, "help") == 0) {
+ return -1;
+ } else if (new_cmd(argv)) {
+ goto done0;
+ } else {
+ struct action_util *a = NULL;
+ int skip_loop = 2;
+ __u32 flag = 0;
+
+ if (!action_a2n(*argv, NULL, false))
+ strncpy(k, "gact", sizeof(k) - 1);
+ else
+ strncpy(k, *argv, sizeof(k) - 1);
+ eap = 0;
+ if (argc > 0) {
+ a = get_action_kind(k);
+ } else {
+done0:
+ if (ok)
+ break;
+ else
+ goto done;
+ }
+
+ if (a == NULL)
+ goto bad_val;
+
+
+ tail = addattr_nest(n, MAX_MSG, ++prio);
+ addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
+
+ ret = a->parse_aopt(a, &argc, &argv,
+ TCA_ACT_OPTIONS | NLA_F_NESTED,
+ n);
+
+ if (ret < 0) {
+ fprintf(stderr, "bad action parsing\n");
+ goto bad_val;
+ }
+
+ if (*argv && strcmp(*argv, "cookie") == 0) {
+ size_t slen;
+
+ NEXT_ARG();
+ slen = strlen(*argv);
+ if (slen > TC_COOKIE_MAX_SIZE * 2) {
+ char cookie_err_m[128];
+
+ snprintf(cookie_err_m, 128,
+ "%zd Max allowed size %d",
+ slen, TC_COOKIE_MAX_SIZE*2);
+ invarg(cookie_err_m, *argv);
+ }
+
+ if (slen % 2 ||
+ hex2mem(*argv, act_ck, slen / 2) < 0)
+ invarg("cookie must be a hex string\n",
+ *argv);
+
+ act_ck_len = slen / 2;
+ argc--;
+ argv++;
+ }
+
+ if (act_ck_len)
+ addattr_l(n, MAX_MSG, TCA_ACT_COOKIE,
+ &act_ck, act_ck_len);
+
+ if (*argv && matches(*argv, "hw_stats") == 0) {
+ NEXT_ARG();
+ ret = parse_hw_stats(*argv, n);
+ if (ret < 0)
+ invarg("value is invalid\n", *argv);
+ NEXT_ARG_FWD();
+ }
+
+ if (*argv && strcmp(*argv, "no_percpu") == 0) {
+ flag |= TCA_ACT_FLAGS_NO_PERCPU_STATS;
+ NEXT_ARG_FWD();
+ }
+
+ /* we need to parse twice to fix skip flag out of order */
+ while (skip_loop--) {
+ if (*argv && strcmp(*argv, "skip_sw") == 0) {
+ flag |= TCA_ACT_FLAGS_SKIP_SW;
+ NEXT_ARG_FWD();
+ } else if (*argv && strcmp(*argv, "skip_hw") == 0) {
+ flag |= TCA_ACT_FLAGS_SKIP_HW;
+ NEXT_ARG_FWD();
+ }
+ }
+
+ if (flag) {
+ struct nla_bitfield32 flags =
+ { flag, flag };
+
+ addattr_l(n, MAX_MSG, TCA_ACT_FLAGS, &flags,
+ sizeof(struct nla_bitfield32));
+ }
+
+ addattr_nest_end(n, tail);
+ ok++;
+ }
+ }
+
+ if (eap > 0) {
+ fprintf(stderr, "bad action empty %d\n", eap);
+ goto bad_val;
+ }
+
+ addattr_nest_end(n, tail2);
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+bad_val:
+ /* no need to undo things, returning from here should
+ * cause enough pain
+ */
+ fprintf(stderr, "parse_action: bad value (%d:%s)!\n", argc, *argv);
+ return -1;
+}
+
+static int tc_print_one_action(FILE *f, struct rtattr *arg, bool bind)
+{
+
+ struct rtattr *tb[TCA_ACT_MAX + 1];
+ int err = 0;
+ struct action_util *a = NULL;
+
+ if (arg == NULL)
+ return -1;
+
+ parse_rtattr_nested(tb, TCA_ACT_MAX, arg);
+
+ if (tb[TCA_ACT_KIND] == NULL) {
+ fprintf(stderr, "NULL Action!\n");
+ return -1;
+ }
+
+
+ a = get_action_kind(RTA_DATA(tb[TCA_ACT_KIND]));
+ if (a == NULL)
+ return err;
+
+ err = a->print_aopt(a, f, tb[TCA_ACT_OPTIONS]);
+
+ if (err < 0)
+ return err;
+
+ if (brief && tb[TCA_ACT_INDEX]) {
+ print_uint(PRINT_ANY, "index", "\t index %u",
+ rta_getattr_u32(tb[TCA_ACT_INDEX]));
+ print_nl();
+ }
+ if (show_stats && tb[TCA_ACT_STATS]) {
+ print_string(PRINT_FP, NULL, "\tAction statistics:", NULL);
+ print_nl();
+ open_json_object("stats");
+ print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
+ close_json_object();
+ print_nl();
+ }
+ if (tb[TCA_ACT_COOKIE]) {
+ int strsz = RTA_PAYLOAD(tb[TCA_ACT_COOKIE]);
+ char b1[strsz * 2 + 1];
+
+ print_string(PRINT_ANY, "cookie", "\tcookie %s",
+ hexstring_n2a(RTA_DATA(tb[TCA_ACT_COOKIE]),
+ strsz, b1, sizeof(b1)));
+ print_nl();
+ }
+ if (tb[TCA_ACT_FLAGS] || tb[TCA_ACT_IN_HW_COUNT]) {
+ bool skip_hw = false;
+ bool newline = false;
+
+ if (tb[TCA_ACT_FLAGS]) {
+ struct nla_bitfield32 *flags = RTA_DATA(tb[TCA_ACT_FLAGS]);
+
+ if (flags->selector & TCA_ACT_FLAGS_NO_PERCPU_STATS) {
+ newline = true;
+ print_bool(PRINT_ANY, "no_percpu", "\tno_percpu",
+ flags->value &
+ TCA_ACT_FLAGS_NO_PERCPU_STATS);
+ }
+ if (!bind) {
+ if (flags->selector & TCA_ACT_FLAGS_SKIP_HW) {
+ newline = true;
+ print_bool(PRINT_ANY, "skip_hw", "\tskip_hw",
+ flags->value &
+ TCA_ACT_FLAGS_SKIP_HW);
+ skip_hw = !!(flags->value & TCA_ACT_FLAGS_SKIP_HW);
+ }
+ if (flags->selector & TCA_ACT_FLAGS_SKIP_SW) {
+ newline = true;
+ print_bool(PRINT_ANY, "skip_sw", "\tskip_sw",
+ flags->value &
+ TCA_ACT_FLAGS_SKIP_SW);
+ }
+ }
+ }
+ if (tb[TCA_ACT_IN_HW_COUNT] && !bind && !skip_hw) {
+ __u32 count = rta_getattr_u32(tb[TCA_ACT_IN_HW_COUNT]);
+
+ newline = true;
+ if (count) {
+ print_bool(PRINT_ANY, "in_hw", "\tin_hw",
+ true);
+ print_uint(PRINT_ANY, "in_hw_count",
+ " in_hw_count %u", count);
+ } else {
+ print_bool(PRINT_ANY, "not_in_hw",
+ "\tnot_in_hw", true);
+ }
+ }
+
+ if (newline)
+ print_nl();
+ }
+ if (tb[TCA_ACT_HW_STATS])
+ print_hw_stats(tb[TCA_ACT_HW_STATS], false);
+
+ if (tb[TCA_ACT_USED_HW_STATS])
+ print_hw_stats(tb[TCA_ACT_USED_HW_STATS], true);
+
+ return 0;
+}
+
+static int
+tc_print_action_flush(FILE *f, const struct rtattr *arg)
+{
+
+ struct rtattr *tb[TCA_MAX + 1];
+ int err = 0;
+ struct action_util *a = NULL;
+ __u32 *delete_count = 0;
+
+ parse_rtattr_nested(tb, TCA_MAX, arg);
+
+ if (tb[TCA_KIND] == NULL) {
+ fprintf(stderr, "NULL Action!\n");
+ return -1;
+ }
+
+ a = get_action_kind(RTA_DATA(tb[TCA_KIND]));
+ if (a == NULL)
+ return err;
+
+ delete_count = RTA_DATA(tb[TCA_FCNT]);
+ fprintf(f, " %s (%d entries)\n", a->id, *delete_count);
+ tab_flush = 0;
+ return 0;
+}
+
+static int
+tc_dump_action(FILE *f, const struct rtattr *arg, unsigned short tot_acts,
+ bool bind)
+{
+
+ int i;
+
+ if (arg == NULL)
+ return 0;
+
+ if (!tot_acts)
+ tot_acts = TCA_ACT_MAX_PRIO;
+
+ struct rtattr *tb[tot_acts + 1];
+
+ parse_rtattr_nested(tb, tot_acts, arg);
+
+ if (tab_flush && tb[0] && !tb[1])
+ return tc_print_action_flush(f, tb[0]);
+
+ open_json_array(PRINT_JSON, "actions");
+ for (i = 0; i <= tot_acts; i++) {
+ if (tb[i]) {
+ open_json_object(NULL);
+ print_nl();
+ print_uint(PRINT_ANY, "order",
+ "\taction order %u: ", i);
+ if (tc_print_one_action(f, tb[i], bind) < 0)
+ fprintf(stderr, "Error printing action\n");
+ close_json_object();
+ }
+
+ }
+ close_json_array(PRINT_JSON, NULL);
+
+ return 0;
+}
+
+int
+tc_print_action(FILE *f, const struct rtattr *arg, unsigned short tot_acts)
+{
+ return tc_dump_action(f, arg, tot_acts, true);
+}
+
+int print_action(struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = (FILE *)arg;
+ struct tcamsg *t = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ __u32 *tot_acts = NULL;
+ struct rtattr *tb[TCA_ROOT_MAX+1];
+
+ len -= NLMSG_LENGTH(sizeof(*t));
+
+ if (len < 0) {
+ fprintf(stderr, "Wrong len %d\n", len);
+ return -1;
+ }
+
+ parse_rtattr(tb, TCA_ROOT_MAX, TA_RTA(t), len);
+
+ if (tb[TCA_ROOT_COUNT])
+ tot_acts = RTA_DATA(tb[TCA_ROOT_COUNT]);
+
+ open_json_object(NULL);
+ print_uint(PRINT_ANY, "total acts", "total acts %u",
+ tot_acts ? *tot_acts : 0);
+ print_nl();
+ close_json_object();
+ if (tb[TCA_ACT_TAB] == NULL) {
+ if (n->nlmsg_type != RTM_GETACTION)
+ fprintf(stderr, "print_action: NULL kind\n");
+ return -1;
+ }
+
+ if (n->nlmsg_type == RTM_DELACTION) {
+ if (n->nlmsg_flags & NLM_F_ROOT) {
+ fprintf(fp, "Flushed table ");
+ tab_flush = 1;
+ } else {
+ fprintf(fp, "Deleted action ");
+ }
+ }
+
+ if (n->nlmsg_type == RTM_NEWACTION) {
+ if ((n->nlmsg_flags & NLM_F_CREATE) &&
+ !(n->nlmsg_flags & NLM_F_REPLACE)) {
+ fprintf(fp, "Added action ");
+ } else if (n->nlmsg_flags & NLM_F_REPLACE) {
+ fprintf(fp, "Replaced action ");
+ }
+ }
+
+ open_json_object(NULL);
+ tc_dump_action(fp, tb[TCA_ACT_TAB], tot_acts ? *tot_acts:0, false);
+ close_json_object();
+
+ return 0;
+}
+
+static int tc_action_gd(int cmd, unsigned int flags,
+ int *argc_p, char ***argv_p)
+{
+ char k[FILTER_NAMESZ];
+ struct action_util *a = NULL;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int prio = 0;
+ int ret = 0;
+ __u32 i = 0;
+ struct rtattr *tail;
+ struct rtattr *tail2;
+ struct nlmsghdr *ans = NULL;
+
+ struct {
+ struct nlmsghdr n;
+ struct tcamsg t;
+ char buf[MAX_MSG];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .t.tca_family = AF_UNSPEC,
+ };
+
+ argc -= 1;
+ argv += 1;
+
+
+ tail = addattr_nest(&req.n, MAX_MSG, TCA_ACT_TAB);
+
+ while (argc > 0) {
+ if (strcmp(*argv, "action") == 0) {
+ argc--;
+ argv++;
+ continue;
+ } else if (strcmp(*argv, "help") == 0) {
+ return -1;
+ }
+
+ strncpy(k, *argv, sizeof(k) - 1);
+ a = get_action_kind(k);
+ if (a == NULL) {
+ fprintf(stderr, "Error: non existent action: %s\n", k);
+ ret = -1;
+ goto bad_val;
+ }
+ if (strcmp(a->id, k) != 0) {
+ fprintf(stderr, "Error: non existent action: %s\n", k);
+ ret = -1;
+ goto bad_val;
+ }
+
+ argc -= 1;
+ argv += 1;
+ if (argc <= 0) {
+ fprintf(stderr,
+ "Error: no index specified action: %s\n", k);
+ ret = -1;
+ goto bad_val;
+ }
+
+ if (matches(*argv, "index") == 0) {
+ NEXT_ARG();
+ if (get_u32(&i, *argv, 10)) {
+ fprintf(stderr, "Illegal \"index\"\n");
+ ret = -1;
+ goto bad_val;
+ }
+ argc -= 1;
+ argv += 1;
+ } else {
+ fprintf(stderr,
+ "Error: no index specified action: %s\n", k);
+ ret = -1;
+ goto bad_val;
+ }
+
+ tail2 = addattr_nest(&req.n, MAX_MSG, ++prio);
+ addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
+ if (i > 0)
+ addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
+ addattr_nest_end(&req.n, tail2);
+
+ }
+
+ addattr_nest_end(&req.n, tail);
+
+ req.n.nlmsg_seq = rth.dump = ++rth.seq;
+
+ if (rtnl_talk(&rth, &req.n, cmd == RTM_DELACTION ? NULL : &ans) < 0) {
+ fprintf(stderr, "We have an error talking to the kernel\n");
+ return 1;
+ }
+
+ if (cmd == RTM_GETACTION) {
+ new_json_obj(json);
+ ret = print_action(ans, stdout);
+ if (ret < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ free(ans);
+ delete_json_obj();
+ return 1;
+ }
+ delete_json_obj();
+ }
+ free(ans);
+
+ *argc_p = argc;
+ *argv_p = argv;
+bad_val:
+ return ret;
+}
+
+static int tc_action_modify(int cmd, unsigned int flags,
+ int *argc_p, char ***argv_p)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int ret = 0;
+ struct {
+ struct nlmsghdr n;
+ struct tcamsg t;
+ char buf[MAX_MSG];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST | flags,
+ .n.nlmsg_type = cmd,
+ .t.tca_family = AF_UNSPEC,
+ };
+ struct rtattr *tail = NLMSG_TAIL(&req.n);
+
+ argc -= 1;
+ argv += 1;
+ if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
+ fprintf(stderr, "Illegal \"action\"\n");
+ return -1;
+ }
+ tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;
+
+ if (rtnl_talk(&rth, &req.n, NULL) < 0) {
+ fprintf(stderr, "We have an error talking to the kernel\n");
+ ret = -1;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+
+ return ret;
+}
+
+static int tc_act_list_or_flush(int *argc_p, char ***argv_p, int event)
+{
+ struct rtattr *tail, *tail2, *tail3, *tail4;
+ int ret = 0, prio = 0, msg_size = 0;
+ struct action_util *a = NULL;
+ struct nla_bitfield32 flag_select = { 0 };
+ char **argv = *argv_p;
+ __u32 msec_since = 0;
+ int argc = *argc_p;
+ char k[FILTER_NAMESZ];
+ struct {
+ struct nlmsghdr n;
+ struct tcamsg t;
+ char buf[MAX_MSG];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg)),
+ .t.tca_family = AF_UNSPEC,
+ };
+
+ tail = addattr_nest(&req.n, MAX_MSG, TCA_ACT_TAB);
+ tail2 = NLMSG_TAIL(&req.n);
+
+ strncpy(k, *argv, sizeof(k) - 1);
+#ifdef CONFIG_GACT
+ if (!gact_ld)
+ get_action_kind("gact");
+
+#endif
+ a = get_action_kind(k);
+ if (a == NULL) {
+ fprintf(stderr, "bad action %s\n", k);
+ goto bad_val;
+ }
+ if (strcmp(a->id, k) != 0) {
+ fprintf(stderr, "bad action %s\n", k);
+ goto bad_val;
+ }
+ strncpy(k, *argv, sizeof(k) - 1);
+
+ argc -= 1;
+ argv += 1;
+
+ if (argc && (strcmp(*argv, "since") == 0)) {
+ NEXT_ARG();
+ if (get_u32(&msec_since, *argv, 0))
+ invarg("dump time \"since\" is invalid", *argv);
+ }
+
+ addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
+ addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
+ tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;
+ addattr_nest_end(&req.n, tail);
+
+ tail3 = NLMSG_TAIL(&req.n);
+ flag_select.value |= TCA_ACT_FLAG_LARGE_DUMP_ON;
+ flag_select.selector |= TCA_ACT_FLAG_LARGE_DUMP_ON;
+ if (brief) {
+ flag_select.value |= TCA_ACT_FLAG_TERSE_DUMP;
+ flag_select.selector |= TCA_ACT_FLAG_TERSE_DUMP;
+ }
+ addattr_l(&req.n, MAX_MSG, TCA_ROOT_FLAGS, &flag_select,
+ sizeof(struct nla_bitfield32));
+ tail3->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail3;
+ if (msec_since) {
+ tail4 = NLMSG_TAIL(&req.n);
+ addattr32(&req.n, MAX_MSG, TCA_ROOT_TIME_DELTA, msec_since);
+ tail4->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail4;
+ }
+ msg_size = NLMSG_ALIGN(req.n.nlmsg_len)
+ - NLMSG_ALIGN(sizeof(struct nlmsghdr));
+
+ if (event == RTM_GETACTION) {
+ if (rtnl_dump_request(&rth, event,
+ (void *)&req.t, msg_size) < 0) {
+ perror("Cannot send dump request");
+ return 1;
+ }
+ new_json_obj(json);
+ ret = rtnl_dump_filter(&rth, print_action, stdout);
+ delete_json_obj();
+ }
+
+ if (event == RTM_DELACTION) {
+ req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len);
+ req.n.nlmsg_type = RTM_DELACTION;
+ req.n.nlmsg_flags |= NLM_F_ROOT;
+ req.n.nlmsg_flags |= NLM_F_REQUEST;
+ if (rtnl_talk(&rth, &req.n, NULL) < 0) {
+ fprintf(stderr, "We have an error flushing\n");
+ return 1;
+ }
+
+ }
+
+bad_val:
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return ret;
+}
+
+int do_action(int argc, char **argv)
+{
+
+ int ret = 0;
+
+ while (argc > 0) {
+
+ if (matches(*argv, "add") == 0) {
+ ret = tc_action_modify(RTM_NEWACTION,
+ NLM_F_EXCL | NLM_F_CREATE,
+ &argc, &argv);
+ } else if (matches(*argv, "change") == 0 ||
+ matches(*argv, "replace") == 0) {
+ ret = tc_action_modify(RTM_NEWACTION,
+ NLM_F_CREATE | NLM_F_REPLACE,
+ &argc, &argv);
+ } else if (matches(*argv, "delete") == 0) {
+ argc -= 1;
+ argv += 1;
+ ret = tc_action_gd(RTM_DELACTION, 0, &argc, &argv);
+ } else if (matches(*argv, "get") == 0) {
+ argc -= 1;
+ argv += 1;
+ ret = tc_action_gd(RTM_GETACTION, 0, &argc, &argv);
+ } else if (matches(*argv, "list") == 0 ||
+ matches(*argv, "show") == 0 ||
+ matches(*argv, "lst") == 0) {
+ if (argc <= 2) {
+ act_usage();
+ return -1;
+ }
+
+ argc -= 2;
+ argv += 2;
+ return tc_act_list_or_flush(&argc, &argv,
+ RTM_GETACTION);
+ } else if (matches(*argv, "flush") == 0) {
+ if (argc <= 2) {
+ act_usage();
+ return -1;
+ }
+
+ argc -= 2;
+ argv += 2;
+ return tc_act_list_or_flush(&argc, &argv,
+ RTM_DELACTION);
+ } else if (matches(*argv, "help") == 0) {
+ act_usage();
+ return -1;
+ } else {
+ fprintf(stderr,
+ "Command \"%s\" is unknown, try \"tc actions help\".\n",
+ *argv);
+ return -1;
+ }
+
+ if (ret < 0)
+ return -1;
+ }
+
+ return 0;
+}