[mirror_iproute2.git] / tc / m_action.c

/*
 * 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 <unistd.h>
#include <syslog.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
int gact_ld = 0 ; //fuckin backward compatibility
#endif
int tab_flush = 0;

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");
	fprintf(stderr,
		"Where: \tACTSPECOP := ACR | GD | FL\n"
			"\tACR := add | change | replace <ACTSPEC>* \n"
			"\tGD := get | delete | <ACTISPEC>*\n"
			"\tFL := ls | list | flush | <ACTNAMESPEC>\n"
			"\tACTNAMESPEC :=  action <ACTNAME>\n"
			"\tACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
			"\tACTSPEC := action <ACTDETAIL> [INDEXSPEC]\n"
			"\tINDEXSPEC := index <32 bit indexvalue>\n"
			"\tACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
			"\t\tExample ACTNAME is gact, mirred, bpf, etc\n"
			"\t\tEach 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) 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 = malloc(sizeof(*a));
	if (a) {
		memset(a, 0, sizeof(*a));
		strncpy(a->id, "noact", 15);
		a->parse_aopt = parse_noaopt;
		a->print_aopt = print_noaopt;
		goto reg;
	}
	return a;
}

static int
new_cmd(char **argv)
{
	if ((matches(*argv, "change") == 0) ||
		(matches(*argv, "replace") == 0)||
		(matches(*argv, "delete") == 0)||
		(matches(*argv, "get") == 0)||
		(matches(*argv, "add") == 0))
			return 1;

	return 0;

}

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[16];
	int ok = 0;
	int eap = 0; /* expect action parameters */

	int ret = 0;
	int prio = 0;

	if (argc <= 0)
		return -1;

	tail = tail2 = NLMSG_TAIL(n);

	addattr_l(n, MAX_MSG, tca_id, NULL, 0);

	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;
			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 (NULL == a) {
				goto bad_val;
			}

			tail = NLMSG_TAIL(n);
			addattr_l(n, MAX_MSG, ++prio, NULL, 0);
			addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);

			ret = a->parse_aopt(a,&argc, &argv, TCA_ACT_OPTIONS, n);

			if (ret < 0) {
				fprintf(stderr,"bad action parsing\n");
				goto bad_val;
			}
			tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
			ok++;
		}

	}

	if (eap > 0) {
		fprintf(stderr,"bad action empty %d\n",eap);
		goto bad_val;
	}

	tail2->rta_len = (void *) NLMSG_TAIL(n) - (void *) 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)
{

	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 (NULL == a)
		return err;

	err = a->print_aopt(a, f, tb[TCA_ACT_OPTIONS]);

	if (0 > err)
		return err;

	if (show_stats && tb[TCA_ACT_STATS]) {
		fprintf(f, "\tAction statistics:\n");
		print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
		fprintf(f, "\n");
	}

	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 (NULL == a)
		return err;

	delete_count = RTA_DATA(tb[TCA_FCNT]);
	fprintf(f," %s (%d entries)\n", a->id, *delete_count);
	tab_flush = 0;
	return 0;
}

int
tc_print_action(FILE *f, const struct rtattr *arg)
{

	int i;
	struct rtattr *tb[TCA_ACT_MAX_PRIO + 1];

	if (arg == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_ACT_MAX_PRIO, arg);

	if (tab_flush && NULL != tb[0]  && NULL == tb[1])
		return tc_print_action_flush(f, tb[0]);

	for (i = 0; i < TCA_ACT_MAX_PRIO; i++) {
		if (tb[i]) {
			fprintf(f, "\n\taction order %d: ", i);
			if (0 > tc_print_one_action(f, tb[i])) {
				fprintf(f, "Error printing action\n");
			}
		}

	}

	return 0;
}

int print_action(const struct sockaddr_nl *who,
			   struct nlmsghdr *n,
			   void *arg)
{
	FILE *fp = (FILE*)arg;
	struct tcamsg *t = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr * tb[TCAA_MAX+1];

	len -= NLMSG_LENGTH(sizeof(*t));

	if (len < 0) {
		fprintf(stderr, "Wrong len %d\n", len);
		return -1;
	}

	parse_rtattr(tb, TCAA_MAX, TA_RTA(t), len);

	if (NULL == tb[TCA_ACT_TAB]) {
		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)
		fprintf(fp, "Added action ");
	tc_print_action(fp, tb[TCA_ACT_TAB]);

	return 0;
}

static int tc_action_gd(int cmd, unsigned flags, int *argc_p, char ***argv_p)
{
	char k[16];
	struct action_util *a = NULL;
	int argc = *argc_p;
	char **argv = *argv_p;
	int prio = 0;
	int ret = 0;
	__u32 i;
	struct sockaddr_nl nladdr;
	struct rtattr *tail;
	struct rtattr *tail2;
	struct nlmsghdr *ans = NULL;

	struct {
		struct nlmsghdr         n;
		struct tcamsg           t;
		char                    buf[MAX_MSG];
	} req;

	req.t.tca_family = AF_UNSPEC;

	memset(&req, 0, sizeof(req));

	memset(&nladdr, 0, sizeof(nladdr));
	nladdr.nl_family = AF_NETLINK;

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	argc -=1;
	argv +=1;


	tail = NLMSG_TAIL(&req.n);
	addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);

	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 (NULL == a) {
			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 = NLMSG_TAIL(&req.n);
		addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
		addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
		addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
		tail2->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail2;

	}

	tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;

	req.n.nlmsg_seq = rth.dump = ++rth.seq;
	if (cmd == RTM_GETACTION)
		ans = &req.n;

	if (rtnl_talk(&rth, &req.n, ans, MAX_MSG) < 0) {
		fprintf(stderr, "We have an error talking to the kernel\n");
		return 1;
	}

	if (ans && print_action(NULL, &req.n, (void*)stdout) < 0) {
		fprintf(stderr, "Dump terminated\n");
		return 1;
	}

	*argc_p = argc;
	*argv_p = argv;
bad_val:
	return ret;
}

static int tc_action_modify(int cmd, unsigned flags, int *argc_p, char ***argv_p)
{
	int argc = *argc_p;
	char **argv = *argv_p;
	int ret = 0;

	struct rtattr *tail;
	struct {
		struct nlmsghdr         n;
		struct tcamsg           t;
		char                    buf[MAX_MSG];
	} req;

	req.t.tca_family = AF_UNSPEC;

	memset(&req, 0, sizeof(req));

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	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) < 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, char **argv, int event)
{
	int ret = 0, prio = 0, msg_size = 0;
	char k[16];
	struct rtattr *tail,*tail2;
	struct action_util *a = NULL;
	struct {
		struct nlmsghdr         n;
		struct tcamsg           t;
		char                    buf[MAX_MSG];
	} req;

	req.t.tca_family = AF_UNSPEC;

	memset(&req, 0, sizeof(req));

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));

	tail = NLMSG_TAIL(&req.n);
	addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
	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 (NULL == a) {
		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);

	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;
	tail->rta_len = (void *) NLMSG_TAIL(&req.n) - (void *) tail;

	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;
		}
		ret = rtnl_dump_filter(&rth, print_action, stdout);
	}

	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) < 0) {
			fprintf(stderr, "We have an error flushing\n");
			return 1;
		}

	}

bad_val:

	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;
			}
			return tc_act_list_or_flush(argc-2, argv+2, RTM_GETACTION);
		} else if (matches(*argv, "flush") == 0) {
			if (argc <= 2) {
				act_usage();
				return -1;
			}
			return tc_act_list_or_flush(argc-2, argv+2, RTM_DELACTION);
		} else if (matches(*argv, "help") == 0) {
			act_usage();
			return -1;
		} else {

			ret = -1;
		}

		if (ret < 0) {
			fprintf(stderr, "Command \"%s\" is unknown, try \"tc actions help\".\n", *argv);
			return -1;
		}
	}

	return 0;
}
Commit	Line	Data
68d5ba54 SH	1	/*
	2	* m_action.c Action Management
	3	*
	4	* This program is free software; you can distribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
ae665a52 SH	9	* Authors: J Hadi Salim (hadi@cyberus.ca)
ae665a52 SH	10	*
68d5ba54 SH	11	* TODO:
	12	* - parse to be passed a filedescriptor for logging purposes
	13	*
	14	*/
	15
	16	#include <stdio.h>
	17	#include <stdlib.h>
	18	#include <unistd.h>
	19	#include <syslog.h>
	20	#include <fcntl.h>
	21	#include <sys/socket.h>
	22	#include <netinet/in.h>
	23	#include <arpa/inet.h>
	24	#include <string.h>
	25	#include <dlfcn.h>
	26
	27	#include "utils.h"
c1027a75	28	#include "tc_common.h"
68d5ba54 SH	29	#include "tc_util.h"
68d5ba54 SH	30
68d5ba54 SH	31	static struct action_util * action_list;
	32	#ifdef CONFIG_GACT
	33	int gact_ld = 0 ; //fuckin backward compatibility
	34	#endif
68d5ba54 SH	35	int tab_flush = 0;
68d5ba54 SH	36
d1f28cf1	37	static void act_usage(void)
68d5ba54	38	{
f1e4f042	39	/*XXX: In the near future add a action->print_help to improve
	40	* usability
	41	* This would mean new tc will not be backward compatible
	42	* with any action .so from the old days. But if someone really
	43	* does that, they would know how to fix this ..
	44	*
302d3fb7	45	*/
f1e4f042	46	fprintf (stderr, "usage: tc actions <ACTSPECOP>*\n");
	47	fprintf(stderr,
	48	"Where: \tACTSPECOP := ACR \| GD \| FL\n"
302d3fb7 SH	49	"\tACR := add \| change \| replace <ACTSPEC>* \n"
	50	"\tGD := get \| delete \| <ACTISPEC>*\n"
	51	"\tFL := ls \| list \| flush \| <ACTNAMESPEC>\n"
	52	"\tACTNAMESPEC := action <ACTNAME>\n"
	53	"\tACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
	54	"\tACTSPEC := action <ACTDETAIL> [INDEXSPEC]\n"
	55	"\tINDEXSPEC := index <32 bit indexvalue>\n"
	56	"\tACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
4bd62446	57	"\t\tExample ACTNAME is gact, mirred, bpf, etc\n"
302d3fb7 SH	58	"\t\tEach action has its own parameters (ACTPARAMS)\n"
	59	"\n");
	60
ebf32083	61	exit(-1);
68d5ba54 SH	62	}
	63
	64	static int print_noaopt(struct action_util au, FILE f, struct rtattr *opt)
	65	{
	66	if (opt && RTA_PAYLOAD(opt))
ae665a52	67	fprintf(f, "[Unknown action, optlen=%u] ",
bb6a21a4	68	(unsigned) RTA_PAYLOAD(opt));
68d5ba54 SH	69	return 0;
	70	}
	71
	72	static int parse_noaopt(struct action_util au, int argc_p, char **argv_p, int code, struct nlmsghdr n)
	73	{
	74	int argc = *argc_p;
	75	char *argv = argv_p;
	76
	77	if (argc) {
	78	fprintf(stderr, "Unknown action \"%s\", hence option \"%s\" is unparsable\n", au->id, *argv);
	79	} else {
	80	fprintf(stderr, "Unknown action \"%s\"\n", au->id);
	81	}
	82	return -1;
	83	}
	84
d1f28cf1	85	static struct action_util get_action_kind(char str)
68d5ba54	86	{
cda4026c	87	static void *aBODY;
68d5ba54 SH	88	void *dlh;
	89	char buf[256];
	90	struct action_util *a;
	91	#ifdef CONFIG_GACT
	92	int looked4gact = 0;
	93	restart_s:
	94	#endif
	95	for (a = action_list; a; a = a->next) {
	96	if (strcmp(a->id, str) == 0)
	97	return a;
	98	}
	99
ab814d63	100	snprintf(buf, sizeof(buf), "%s/m_%s.so", get_tc_lib(), str);
02833d1b	101	dlh = dlopen(buf, RTLD_LAZY \| RTLD_GLOBAL);
68d5ba54 SH	102	if (dlh == NULL) {
	103	dlh = aBODY;
	104	if (dlh == NULL) {
	105	dlh = aBODY = dlopen(NULL, RTLD_LAZY);
	106	if (dlh == NULL)
	107	goto noexist;
	108	}
	109	}
	110
95812b56	111	snprintf(buf, sizeof(buf), "%s_action_util", str);
68d5ba54 SH	112	a = dlsym(dlh, buf);
	113	if (a == NULL)
	114	goto noexist;
	115
	116	reg:
	117	a->next = action_list;
	118	action_list = a;
	119	return a;
	120
	121	noexist:
	122	#ifdef CONFIG_GACT
	123	if (!looked4gact) {
	124	looked4gact = 1;
	125	strcpy(str,"gact");
	126	goto restart_s;
	127	}
	128	#endif
	129	a = malloc(sizeof(*a));
	130	if (a) {
	131	memset(a, 0, sizeof(*a));
	132	strncpy(a->id, "noact", 15);
	133	a->parse_aopt = parse_noaopt;
	134	a->print_aopt = print_noaopt;
	135	goto reg;
	136	}
	137	return a;
	138	}
	139
d1f28cf1	140	static int
ae665a52	141	new_cmd(char **argv)
68d5ba54 SH	142	{
	143	if ((matches(*argv, "change") == 0) \|\|
	144	(matches(*argv, "replace") == 0)\|\|
	145	(matches(*argv, "delete") == 0)\|\|
b159a7f1	146	(matches(*argv, "get") == 0)\|\|
68d5ba54 SH	147	(matches(*argv, "add") == 0))
	148	return 1;
	149
	150	return 0;
	151
	152	}
	153
	154	int
	155	parse_action(int argc_p, char *argv_p, int tca_id, struct nlmsghdr n)
	156	{
	157	int argc = *argc_p;
	158	char *argv = argv_p;
	159	struct rtattr tail, tail2;
	160	char k[16];
	161	int ok = 0;
	162	int eap = 0; /* expect action parameters */
	163
	164	int ret = 0;
	165	int prio = 0;
	166
	167	if (argc <= 0)
	168	return -1;
	169
4a86fe19	170	tail = tail2 = NLMSG_TAIL(n);
68d5ba54 SH	171
	172	addattr_l(n, MAX_MSG, tca_id, NULL, 0);
	173
	174	while (argc > 0) {
	175
	176	memset(k, 0, sizeof (k));
	177
	178	if (strcmp(*argv, "action") == 0 ) {
	179	argc--;
	180	argv++;
	181	eap = 1;
	182	#ifdef CONFIG_GACT
	183	if (!gact_ld) {
	184	get_action_kind("gact");
	185	}
	186	#endif
	187	continue;
9282d08d JHS	188	} else if (strcmp(*argv, "flowid") == 0) {
	189	break;
	190	} else if (strcmp(*argv, "classid") == 0) {
	191	break;
68d5ba54 SH	192	} else if (strcmp(*argv, "help") == 0) {
	193	return -1;
	194	} else if (new_cmd(argv)) {
	195	goto done0;
	196	} else {
	197	struct action_util *a = NULL;
	198	strncpy(k, *argv, sizeof (k) - 1);
	199	eap = 0;
	200	if (argc > 0 ) {
	201	a = get_action_kind(k);
	202	} else {
	203	done0:
	204	if (ok)
	205	break;
	206	else
	207	goto done;
	208	}
	209
ae665a52	210	if (NULL == a) {
68d5ba54 SH	211	goto bad_val;
	212	}
	213
4a86fe19	214	tail = NLMSG_TAIL(n);
68d5ba54 SH	215	addattr_l(n, MAX_MSG, ++prio, NULL, 0);
	216	addattr_l(n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
	217
	218	ret = a->parse_aopt(a,&argc, &argv, TCA_ACT_OPTIONS, n);
	219
	220	if (ret < 0) {
	221	fprintf(stderr,"bad action parsing\n");
	222	goto bad_val;
	223	}
4a86fe19	224	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
68d5ba54 SH	225	ok++;
	226	}
	227
	228	}
	229
	230	if (eap > 0) {
	231	fprintf(stderr,"bad action empty %d\n",eap);
	232	goto bad_val;
	233	}
	234
4a86fe19	235	tail2->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail2;
68d5ba54 SH	236
	237	done:
	238	*argc_p = argc;
	239	*argv_p = argv;
	240	return 0;
	241	bad_val:
ae665a52	242	/* no need to undo things, returning from here should
68d5ba54 SH	243	* cause enough pain */
	244	fprintf(stderr, "parse_action: bad value (%d:%s)!\n",argc,*argv);
	245	return -1;
	246	}
	247
d1f28cf1	248	static int
68d5ba54 SH	249	tc_print_one_action(FILE * f, struct rtattr *arg)
	250	{
	251
954de6c7	252	struct rtattr *tb[TCA_ACT_MAX + 1];
68d5ba54 SH	253	int err = 0;
	254	struct action_util *a = NULL;
	255
	256	if (arg == NULL)
	257	return -1;
	258
954de6c7 JHS	259	parse_rtattr_nested(tb, TCA_ACT_MAX, arg);
	260
	261	if (tb[TCA_ACT_KIND] == NULL) {
68d5ba54 SH	262	fprintf(stderr, "NULL Action!\n");
	263	return -1;
	264	}
	265
	266
954de6c7	267	a = get_action_kind(RTA_DATA(tb[TCA_ACT_KIND]));
68d5ba54 SH	268	if (NULL == a)
	269	return err;
	270
954de6c7	271	err = a->print_aopt(a, f, tb[TCA_ACT_OPTIONS]);
68d5ba54 SH	272
	273	if (0 > err)
	274	return err;
	275
954de6c7	276	if (show_stats && tb[TCA_ACT_STATS]) {
e5879dc6	277	fprintf(f, "\tAction statistics:\n");
e5879dc6	278	print_tcstats2_attr(f, tb[TCA_ACT_STATS], "\t", NULL);
3d327bf5	279	fprintf(f, "\n");
68d5ba54 SH	280	}
	281
	282	return 0;
	283	}
	284
954de6c7 JHS	285	static int
	286	tc_print_action_flush(FILE f, const struct rtattr arg)
	287	{
	288
	289	struct rtattr *tb[TCA_MAX + 1];
	290	int err = 0;
	291	struct action_util *a = NULL;
	292	__u32 *delete_count = 0;
	293
	294	parse_rtattr_nested(tb, TCA_MAX, arg);
	295
	296	if (tb[TCA_KIND] == NULL) {
	297	fprintf(stderr, "NULL Action!\n");
	298	return -1;
	299	}
	300
	301	a = get_action_kind(RTA_DATA(tb[TCA_KIND]));
	302	if (NULL == a)
	303	return err;
	304
	305	delete_count = RTA_DATA(tb[TCA_FCNT]);
	306	fprintf(f," %s (%d entries)\n", a->id, *delete_count);
	307	tab_flush = 0;
	308	return 0;
	309	}
	310
68d5ba54	311	int
954de6c7	312	tc_print_action(FILE f, const struct rtattr arg)
68d5ba54 SH	313	{
	314
	315	int i;
	316	struct rtattr *tb[TCA_ACT_MAX_PRIO + 1];
	317
	318	if (arg == NULL)
	319	return 0;
	320
ac2fc2df	321	parse_rtattr_nested(tb, TCA_ACT_MAX_PRIO, arg);
68d5ba54	322
954de6c7 JHS	323	if (tab_flush && NULL != tb[0] && NULL == tb[1])
954de6c7 JHS	324	return tc_print_action_flush(f, tb[0]);
68d5ba54 SH	325
	326	for (i = 0; i < TCA_ACT_MAX_PRIO; i++) {
	327	if (tb[i]) {
f24a7e72	328	fprintf(f, "\n\taction order %d: ", i);
68d5ba54 SH	329	if (0 > tc_print_one_action(f, tb[i])) {
	330	fprintf(f, "Error printing action\n");
	331	}
	332	}
	333
	334	}
	335
68d5ba54 SH	336	return 0;
	337	}
	338
5bec3484	339	int print_action(const struct sockaddr_nl *who,
50772dc5	340	struct nlmsghdr *n,
3d327bf5	341	void *arg)
68d5ba54 SH	342	{
	343	FILE fp = (FILE)arg;
	344	struct tcamsg *t = NLMSG_DATA(n);
	345	int len = n->nlmsg_len;
	346	struct rtattr * tb[TCAA_MAX+1];
	347
	348	len -= NLMSG_LENGTH(sizeof(*t));
	349
	350	if (len < 0) {
	351	fprintf(stderr, "Wrong len %d\n", len);
	352	return -1;
	353	}
	354
68d5ba54 SH	355	parse_rtattr(tb, TCAA_MAX, TA_RTA(t), len);
	356
	357	if (NULL == tb[TCA_ACT_TAB]) {
	358	if (n->nlmsg_type != RTM_GETACTION)
5bec3484	359	fprintf(stderr, "print_action: NULL kind\n");
68d5ba54	360	return -1;
ae665a52	361	}
68d5ba54 SH	362
	363	if (n->nlmsg_type == RTM_DELACTION) {
	364	if (n->nlmsg_flags & NLM_F_ROOT) {
ae665a52	365	fprintf(fp, "Flushed table ");
68d5ba54 SH	366	tab_flush = 1;
	367	} else {
	368	fprintf(fp, "deleted action ");
	369	}
	370	}
	371
	372	if (n->nlmsg_type == RTM_NEWACTION)
	373	fprintf(fp, "Added action ");
	374	tc_print_action(fp, tb[TCA_ACT_TAB]);
	375
	376	return 0;
	377	}
	378
d1f28cf1	379	static int tc_action_gd(int cmd, unsigned flags, int argc_p, char **argv_p)
68d5ba54 SH	380	{
	381	char k[16];
	382	struct action_util *a = NULL;
	383	int argc = *argc_p;
	384	char *argv = argv_p;
	385	int prio = 0;
	386	int ret = 0;
	387	__u32 i;
68d5ba54 SH	388	struct sockaddr_nl nladdr;
	389	struct rtattr *tail;
	390	struct rtattr *tail2;
	391	struct nlmsghdr *ans = NULL;
	392
	393	struct {
	394	struct nlmsghdr n;
	395	struct tcamsg t;
	396	char buf[MAX_MSG];
	397	} req;
	398
	399	req.t.tca_family = AF_UNSPEC;
	400
	401	memset(&req, 0, sizeof(req));
	402
	403	memset(&nladdr, 0, sizeof(nladdr));
	404	nladdr.nl_family = AF_NETLINK;
	405
	406	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
	407	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	408	req.n.nlmsg_type = cmd;
	409	argc -=1;
	410	argv +=1;
	411
	412
4a86fe19	413	tail = NLMSG_TAIL(&req.n);
68d5ba54 SH	414	addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
	415
	416	while (argc > 0) {
	417	if (strcmp(*argv, "action") == 0 ) {
	418	argc--;
	419	argv++;
	420	continue;
	421	} else if (strcmp(*argv, "help") == 0) {
	422	return -1;
	423	}
	424
	425	strncpy(k, *argv, sizeof (k) - 1);
	426	a = get_action_kind(k);
ae665a52	427	if (NULL == a) {
68d5ba54 SH	428	fprintf(stderr, "Error: non existent action: %s\n",k);
	429	ret = -1;
	430	goto bad_val;
	431	}
	432	if (strcmp(a->id, k) != 0) {
	433	fprintf(stderr, "Error: non existent action: %s\n",k);
	434	ret = -1;
	435	goto bad_val;
	436	}
	437
	438	argc -=1;
	439	argv +=1;
	440	if (argc <= 0) {
	441	fprintf(stderr, "Error: no index specified action: %s\n",k);
	442	ret = -1;
	443	goto bad_val;
	444	}
	445
	446	if (matches(*argv, "index") == 0) {
	447	NEXT_ARG();
	448	if (get_u32(&i, *argv, 10)) {
	449	fprintf(stderr, "Illegal \"index\"\n");
	450	ret = -1;
	451	goto bad_val;
	452	}
	453	argc -=1;
	454	argv +=1;
	455	} else {
	456	fprintf(stderr, "Error: no index specified action: %s\n",k);
	457	ret = -1;
	458	goto bad_val;
	459	}
	460
4a86fe19	461	tail2 = NLMSG_TAIL(&req.n);
	462	addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
	463	addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
	464	addattr32(&req.n, MAX_MSG, TCA_ACT_INDEX, i);
	465	tail2->rta_len = (void ) NLMSG_TAIL(&req.n) - (void ) tail2;
68d5ba54 SH	466
	467	}
	468
4a86fe19	469	tail->rta_len = (void ) NLMSG_TAIL(&req.n) - (void ) tail;
68d5ba54	470
68d5ba54 SH	471	req.n.nlmsg_seq = rth.dump = ++rth.seq;
	472	if (cmd == RTM_GETACTION)
	473	ans = &req.n;
c1027a75	474
c079e121	475	if (rtnl_talk(&rth, &req.n, ans, MAX_MSG) < 0) {
68d5ba54	476	fprintf(stderr, "We have an error talking to the kernel\n");
52f337c1	477	return 1;
68d5ba54 SH	478	}
68d5ba54 SH	479
5bec3484	480	if (ans && print_action(NULL, &req.n, (void*)stdout) < 0) {
68d5ba54	481	fprintf(stderr, "Dump terminated\n");
52f337c1	482	return 1;
68d5ba54 SH	483	}
	484
	485	*argc_p = argc;
	486	*argv_p = argv;
68d5ba54 SH	487	bad_val:
	488	return ret;
	489	}
	490
d1f28cf1	491	static int tc_action_modify(int cmd, unsigned flags, int argc_p, char **argv_p)
68d5ba54 SH	492	{
	493	int argc = *argc_p;
	494	char *argv = argv_p;
	495	int ret = 0;
	496
68d5ba54 SH	497	struct rtattr *tail;
	498	struct {
	499	struct nlmsghdr n;
	500	struct tcamsg t;
	501	char buf[MAX_MSG];
	502	} req;
	503
	504	req.t.tca_family = AF_UNSPEC;
	505
	506	memset(&req, 0, sizeof(req));
	507
	508	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
	509	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	510	req.n.nlmsg_type = cmd;
4a86fe19	511	tail = NLMSG_TAIL(&req.n);
68d5ba54 SH	512	argc -=1;
	513	argv +=1;
	514	if (parse_action(&argc, &argv, TCA_ACT_TAB, &req.n)) {
	515	fprintf(stderr, "Illegal \"action\"\n");
	516	return -1;
	517	}
4a86fe19	518	tail->rta_len = (void ) NLMSG_TAIL(&req.n) - (void ) tail;
68d5ba54	519
c079e121	520	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
68d5ba54 SH	521	fprintf(stderr, "We have an error talking to the kernel\n");
	522	ret = -1;
	523	}
	524
	525	*argc_p = argc;
	526	*argv_p = argv;
c1027a75	527
68d5ba54 SH	528	return ret;
	529	}
	530
d1f28cf1	531	static int tc_act_list_or_flush(int argc, char **argv, int event)
68d5ba54 SH	532	{
	533	int ret = 0, prio = 0, msg_size = 0;
	534	char k[16];
68d5ba54 SH	535	struct rtattr tail,tail2;
	536	struct action_util *a = NULL;
	537	struct {
	538	struct nlmsghdr n;
	539	struct tcamsg t;
	540	char buf[MAX_MSG];
	541	} req;
	542
	543	req.t.tca_family = AF_UNSPEC;
	544
	545	memset(&req, 0, sizeof(req));
	546
	547	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcamsg));
	548
4a86fe19	549	tail = NLMSG_TAIL(&req.n);
68d5ba54	550	addattr_l(&req.n, MAX_MSG, TCA_ACT_TAB, NULL, 0);
4a86fe19	551	tail2 = NLMSG_TAIL(&req.n);
68d5ba54 SH	552
	553	strncpy(k, *argv, sizeof (k) - 1);
	554	#ifdef CONFIG_GACT
	555	if (!gact_ld) {
	556	get_action_kind("gact");
	557	}
	558	#endif
	559	a = get_action_kind(k);
ae665a52	560	if (NULL == a) {
68d5ba54 SH	561	fprintf(stderr,"bad action %s\n",k);
	562	goto bad_val;
	563	}
	564	if (strcmp(a->id, k) != 0) {
	565	fprintf(stderr,"bad action %s\n",k);
	566	goto bad_val;
	567	}
	568	strncpy(k, *argv, sizeof (k) - 1);
	569
	570	addattr_l(&req.n, MAX_MSG, ++prio, NULL, 0);
	571	addattr_l(&req.n, MAX_MSG, TCA_ACT_KIND, k, strlen(k) + 1);
4a86fe19	572	tail2->rta_len = (void ) NLMSG_TAIL(&req.n) - (void ) tail2;
4a86fe19	573	tail->rta_len = (void ) NLMSG_TAIL(&req.n) - (void ) tail;
68d5ba54	574
68d5ba54 SH	575	msg_size = NLMSG_ALIGN(req.n.nlmsg_len) - NLMSG_ALIGN(sizeof(struct nlmsghdr));
68d5ba54 SH	576
ae665a52	577	if (event == RTM_GETACTION) {
68d5ba54 SH	578	if (rtnl_dump_request(&rth, event, (void *)&req.t, msg_size) < 0) {
68d5ba54 SH	579	perror("Cannot send dump request");
52f337c1	580	return 1;
68d5ba54	581	}
cd70f3f5	582	ret = rtnl_dump_filter(&rth, print_action, stdout);
68d5ba54 SH	583	}
68d5ba54 SH	584
ae665a52	585	if (event == RTM_DELACTION) {
68d5ba54 SH	586	req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len);
	587	req.n.nlmsg_type = RTM_DELACTION;
	588	req.n.nlmsg_flags \|= NLM_F_ROOT;
	589	req.n.nlmsg_flags \|= NLM_F_REQUEST;
c079e121	590	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
68d5ba54	591	fprintf(stderr, "We have an error flushing\n");
52f337c1	592	return 1;
68d5ba54 SH	593	}
	594
	595	}
	596
	597	bad_val:
	598
68d5ba54 SH	599	return ret;
	600	}
	601
	602	int do_action(int argc, char **argv)
	603	{
	604
	605	int ret = 0;
	606
	607	while (argc > 0) {
	608
	609	if (matches(*argv, "add") == 0) {
	610	ret = tc_action_modify(RTM_NEWACTION, NLM_F_EXCL\|NLM_F_CREATE, &argc, &argv);
	611	} else if (matches(*argv, "change") == 0 \|\|
	612	matches(*argv, "replace") == 0) {
	613	ret = tc_action_modify(RTM_NEWACTION, NLM_F_CREATE\|NLM_F_REPLACE, &argc, &argv);
	614	} else if (matches(*argv, "delete") == 0) {
	615	argc -=1;
	616	argv +=1;
	617	ret = tc_action_gd(RTM_DELACTION, 0, &argc, &argv);
	618	} else if (matches(*argv, "get") == 0) {
	619	argc -=1;
	620	argv +=1;
	621	ret = tc_action_gd(RTM_GETACTION, 0, &argc, &argv);
	622	} else if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	623	\|\| matches(*argv, "lst") == 0) {
	624	if (argc <= 2) {
	625	act_usage();
	626	return -1;
	627	}
	628	return tc_act_list_or_flush(argc-2, argv+2, RTM_GETACTION);
	629	} else if (matches(*argv, "flush") == 0) {
	630	if (argc <= 2) {
	631	act_usage();
	632	return -1;
	633	}
	634	return tc_act_list_or_flush(argc-2, argv+2, RTM_DELACTION);
	635	} else if (matches(*argv, "help") == 0) {
	636	act_usage();
	637	return -1;
	638	} else {
	639
	640	ret = -1;
	641	}
	642
	643	if (ret < 0) {
f1e4f042	644	fprintf(stderr, "Command \"%s\" is unknown, try \"tc actions help\".\n", *argv);
68d5ba54 SH	645	return -1;
	646	}
	647	}
	648
	649	return 0;
	650	}
	651