busybox/networking/tc.c

/* vi: set sw=4 ts=4: */
/*
 * tc.c		"tc" utility frontend.
 *
 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 * Bernhard Reutner-Fischer adjusted for busybox
 */

#include "libbb.h"

#include "libiproute/utils.h"
#include "libiproute/ip_common.h"
#include "libiproute/rt_names.h"
#include <linux/pkt_sched.h> /* for the TC_H_* macros */

#define parse_rtattr_nested(tb, max, rta) \
	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))

/* nullifies tb on error */
#define __parse_rtattr_nested_compat(tb, max, rta, len) \
	({if ((RTA_PAYLOAD(rta) >= len) && \
		 (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr))) { \
			rta = RTA_DATA(rta) + RTA_ALIGN(len); \
			parse_rtattr_nested(tb, max, rta); \
	  } else \
			memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); \
	})

#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
	({data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
	__parse_rtattr_nested_compat(tb, max, rta, len); })

#define show_details (0) /* not implemented. Does anyone need it? */
#define use_iec (0) /* not currently documented in the upstream manpage */


struct globals {
	int filter_ifindex;
	__u32 filter_qdisc;
	__u32 filter_parent;
	__u32 filter_prio;
	__u32 filter_proto;
};

#define G (*(struct globals*)&bb_common_bufsiz1)
#define filter_ifindex (G.filter_ifindex)
#define filter_qdisc (G.filter_qdisc)
#define filter_parent (G.filter_parent)
#define filter_prio (G.filter_prio)
#define filter_proto (G.filter_proto)

void BUG_tc_globals_too_big(void);
#define INIT_G() do { \
	if (sizeof(G) > COMMON_BUFSIZE) \
		BUG_tc_globals_too_big(); \
} while (0)

/* Allocates a buffer containing the name of a class id.
 * The caller must free the returned memory.  */
static char* print_tc_classid(uint32_t cid)
{
#if 0 /* IMPOSSIBLE */
	if (cid == TC_H_ROOT)
		return xasprintf("root");
	else
#endif
	if (cid == TC_H_UNSPEC)
		return xasprintf("none");
	else if (TC_H_MAJ(cid) == 0)
		return xasprintf(":%x", TC_H_MIN(cid));
	else if (TC_H_MIN(cid) == 0)
		return xasprintf("%x:", TC_H_MAJ(cid)>>16);
	else
		return xasprintf("%x:%x", TC_H_MAJ(cid)>>16, TC_H_MIN(cid));
}

/* Get a qdisc handle.  Return 0 on success, !0 otherwise.  */
static int get_qdisc_handle(__u32 *h, const char *str) {
	__u32 maj;
	char *p;

	maj = TC_H_UNSPEC;
	if (!strcmp(str, "none"))
		goto ok;
	maj = strtoul(str, &p, 16);
	if (p == str)
		return 1;
	maj <<= 16;
	if (*p != ':' && *p!=0)
		return 1;
 ok:
	*h = maj;
	return 0;
}

/* Get class ID.  Return 0 on success, !0 otherwise.  */
static int get_tc_classid(__u32 *h, const char *str) {
	__u32 maj, min;
	char *p;

	maj = TC_H_ROOT;
	if (!strcmp(str, "root"))
		goto ok;
	maj = TC_H_UNSPEC;
	if (!strcmp(str, "none"))
		goto ok;
	maj = strtoul(str, &p, 16);
	if (p == str) {
		if (*p != ':')
			return 1;
		maj = 0;
	}
	if (*p == ':') {
		if (maj >= (1<<16))
			return 1;
		maj <<= 16;
		str = p + 1;
		min = strtoul(str, &p, 16);
		if (*p != 0 || min >= (1<<16))
			return 1;
		maj |= min;
	} else if (*p != 0)
		return 1;
 ok:
	*h = maj;
	return 0;
}

static void print_rate(char *buf, int len, uint32_t rate)
{
	double tmp = (double)rate*8;

	if (use_iec) {
		if (tmp >= 1000.0*1024.0*1024.0)
			snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
		else if (tmp >= 1000.0*1024)
			snprintf(buf, len, "%.0fKibit", tmp/1024);
		else
			snprintf(buf, len, "%.0fbit", tmp);
	} else {
		if (tmp >= 1000.0*1000000.0)
			snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
		else if (tmp >= 1000.0 * 1000.0)
			snprintf(buf, len, "%.0fKbit", tmp/1000.0);
		else
			snprintf(buf, len, "%.0fbit",  tmp);
	}
}

/* This is "pfifo_fast".  */
static int prio_parse_opt(int argc, char **argv, struct nlmsghdr *n)
{
	return 0;
}
static int prio_print_opt(struct rtattr *opt)
{
	int i;
	struct tc_prio_qopt *qopt;
	struct rtattr *tb[TCA_PRIO_MAX+1];

	if (opt == NULL)
		return 0;
	parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
	if (tb == NULL)
		return 0;
	printf("bands %u priomap ", qopt->bands);
	for (i=0; i<=TC_PRIO_MAX; i++)
		printf(" %d", qopt->priomap[i]);

	if (tb[TCA_PRIO_MQ])
		printf(" multiqueue: o%s ",
		    *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");

	return 0;
}

/* Class Based Queue */
static int cbq_parse_opt(int argc, char **argv, struct nlmsghdr *n)
{
	return 0;
}
static int cbq_print_opt(struct rtattr *opt)
{
	struct rtattr *tb[TCA_CBQ_MAX+1];
	struct tc_ratespec *r = NULL;
	struct tc_cbq_lssopt *lss = NULL;
	struct tc_cbq_wrropt *wrr = NULL;
	struct tc_cbq_fopt *fopt = NULL;
	struct tc_cbq_ovl *ovl = NULL;
	const char * const error = "CBQ: too short %s opt";
	RESERVE_CONFIG_BUFFER(buf, 64);

	if (opt == NULL)
		goto done;
	parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);

	if (tb[TCA_CBQ_RATE]) {
		if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
			bb_error_msg(error, "rate");
		else
			r = RTA_DATA(tb[TCA_CBQ_RATE]);
	}
	if (tb[TCA_CBQ_LSSOPT]) {
		if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
			bb_error_msg(error, "lss");
		else
			lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
	}
	if (tb[TCA_CBQ_WRROPT]) {
		if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
			bb_error_msg(error, "wrr");
		else
			wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
	}
	if (tb[TCA_CBQ_FOPT]) {
		if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
			bb_error_msg(error, "fopt");
		else
			fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
	}
	if (tb[TCA_CBQ_OVL_STRATEGY]) {
		if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
			bb_error_msg("CBQ: too short overlimit strategy %u/%u",
				(unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
				(unsigned) sizeof(*ovl));
		else
			ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
	}

	if (r) {
		print_rate(buf, sizeof(buf), r->rate);
		printf("rate %s ", buf);
		if (show_details) {
			printf("cell %ub ", 1<<r->cell_log);
			if (r->mpu)
				printf("mpu %ub ", r->mpu);
			if (r->overhead)
				printf("overhead %ub ", r->overhead);
		}
	}
	if (lss && lss->flags) {
		bool comma = false;
		bb_putchar('(');
		if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
			printf("bounded");
			comma = true;
		}
		if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
			if (comma)
				bb_putchar(',');
			printf("isolated");
		}
		printf(") ");
	}
	if (wrr) {
		if (wrr->priority != TC_CBQ_MAXPRIO)
			printf("prio %u", wrr->priority);
		else
			printf("prio no-transmit");
		if (show_details) {
			printf("/%u ", wrr->cpriority);
			if (wrr->weight != 1) {
				print_rate(buf, sizeof(buf), wrr->weight);
				printf("weight %s ", buf);
			}
			if (wrr->allot)
				printf("allot %ub ", wrr->allot);
		}
	}
 done:
	RELEASE_CONFIG_BUFFER(buf);
	return 0;
}

static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
						struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
{
	struct tcmsg *msg = NLMSG_DATA(hdr);
	int len = hdr->nlmsg_len;
	struct rtattr * tb[TCA_MAX+1];
	char *name;

	if (hdr->nlmsg_type != RTM_NEWQDISC && hdr->nlmsg_type != RTM_DELQDISC) {
		/* bb_error_msg("Not a qdisc"); */
		return 0; /* ??? mimic upstream; should perhaps return -1 */
	}
	len -= NLMSG_LENGTH(sizeof(*msg));
	if (len < 0) {
		/* bb_error_msg("Wrong len %d", len); */
		return -1;
	}
	/* not the desired interface? */
	if (filter_ifindex && filter_ifindex != msg->tcm_ifindex)
		return 0;
	memset (tb, 0, sizeof(tb));
	parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
	if (tb[TCA_KIND] == NULL) {
		/* bb_error_msg("%s: NULL kind", "qdisc"); */
		return -1;
	}
	if (hdr->nlmsg_type == RTM_DELQDISC)
		printf("deleted ");
	name = (char*)RTA_DATA(tb[TCA_KIND]);
	printf("qdisc %s %x: ", name, msg->tcm_handle>>16);
	if (filter_ifindex == 0)
		printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
	if (msg->tcm_parent == TC_H_ROOT)
		printf("root ");
	else if (msg->tcm_parent) {
		char *classid = print_tc_classid(msg->tcm_parent);
		printf("parent %s ", classid);
		if (ENABLE_FEATURE_CLEAN_UP)
			free(classid);
	}
	if (msg->tcm_info != 1)
		printf("refcnt %d ", msg->tcm_info);
	if (tb[TCA_OPTIONS]) {
		static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
		int qqq = index_in_strings(_q_, name);
		if (qqq == 0) { /* pfifo_fast aka prio */
			prio_print_opt(tb[TCA_OPTIONS]);
		} else if (qqq == 1) { /* class based queueing */
			cbq_print_opt(tb[TCA_OPTIONS]);
		} else
			bb_error_msg("unknown %s", name);
	}
	bb_putchar('\n');
	return 0;
}

static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
						struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
{
	struct tcmsg *msg = NLMSG_DATA(hdr);
	int len = hdr->nlmsg_len;
	struct rtattr * tb[TCA_MAX+1];
	char *name, *classid;

	/*XXX Eventually factor out common code */

	if (hdr->nlmsg_type != RTM_NEWTCLASS && hdr->nlmsg_type != RTM_DELTCLASS) {
		/* bb_error_msg("Not a class"); */
		return 0; /* ??? mimic upstream; should perhaps return -1 */
	}
	len -= NLMSG_LENGTH(sizeof(*msg));
	if (len < 0) {
		/* bb_error_msg("Wrong len %d", len); */
		return -1;
	}
	/* not the desired interface? */
	if (filter_qdisc && TC_H_MAJ(msg->tcm_handle^filter_qdisc))
		return 0;
	memset (tb, 0, sizeof(tb));
	parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
	if (tb[TCA_KIND] == NULL) {
		/* bb_error_msg("%s: NULL kind", "class"); */
		return -1;
	}
	if (hdr->nlmsg_type == RTM_DELTCLASS)
		printf("deleted ");

	name = (char*)RTA_DATA(tb[TCA_KIND]);
	classid = !msg->tcm_handle ? NULL : print_tc_classid(
				filter_qdisc ? TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
	printf ("class %s %s", name, classid);
	if (ENABLE_FEATURE_CLEAN_UP)
		free(classid);

	if (filter_ifindex == 0)
		printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
	if (msg->tcm_parent == TC_H_ROOT)
		printf("root ");
	else if (msg->tcm_parent) {
		classid = print_tc_classid(filter_qdisc ?
								   TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
		printf("parent %s ", classid);
		if (ENABLE_FEATURE_CLEAN_UP)
			free(classid);
	}
	if (msg->tcm_info)
		printf("leaf %x ", msg->tcm_info >> 16);
	/* Do that get_qdisc_kind(RTA_DATA(tb[TCA_KIND])).  */
	if (tb[TCA_OPTIONS]) {
		static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
		int qqq = index_in_strings(_q_, name);
		if (qqq == 0) { /* pfifo_fast aka prio */
			/* nothing. */ /*prio_print_opt(tb[TCA_OPTIONS]);*/
		} else if (qqq == 1) { /* class based queueing */
			/* cbq_print_copt() is identical to cbq_print_opt(). */
			cbq_print_opt(tb[TCA_OPTIONS]);
		} else
			bb_error_msg("unknown %s", name);
	}
	bb_putchar('\n');

	return 0;
}

static int print_filter(const struct sockaddr_nl *who UNUSED_PARAM,
						struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
{
	struct tcmsg *msg = NLMSG_DATA(hdr);
	int len = hdr->nlmsg_len;
	struct rtattr * tb[TCA_MAX+1];
	return 0;
}

int tc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int tc_main(int argc UNUSED_PARAM, char **argv)
{
	static const char objects[] ALIGN1 =
		"qdisc\0""class\0""filter\0"
		;
	enum { OBJ_qdisc = 0, OBJ_class, OBJ_filter };
	static const char commands[] ALIGN1 =
		"add\0""delete\0""change\0"
		"link\0" /* only qdisc */
		"replace\0"
		"show\0""list\0"
		;
	static const char args[] ALIGN1 =
		"dev\0" /* qdisc, class, filter */
		"root\0" /* class, filter */
		"parent\0" /* class, filter */
		"qdisc\0" /* class */
		"handle\0" /* change: qdisc, class(classid) list: filter */
		"classid\0" /* change: for class use "handle" */
		"preference\0""priority\0""protocol\0" /* filter */
		;
	enum { CMD_add = 0, CMD_del, CMD_change, CMD_link, CMD_replace, CMD_show };
	enum { ARG_dev = 0, ARG_root, ARG_parent, ARG_qdisc,
			ARG_handle, ARG_classid, ARG_pref, ARG_prio, ARG_proto};
	struct rtnl_handle rth;
	struct tcmsg msg;
	int ret, obj, cmd, arg;
	char *dev = NULL;

	INIT_G();

	if (!*++argv)
		bb_show_usage();
	xrtnl_open(&rth);
	ret = EXIT_SUCCESS;

	obj = index_in_substrings(objects, *argv++);

	if (obj < OBJ_qdisc)
		bb_show_usage();
	if (!*argv)
		cmd = CMD_show; /* list is the default */
	else {
		cmd = index_in_substrings(commands, *argv);
		if (cmd < 0)
			bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
		argv++;
	}
	memset(&msg, 0, sizeof(msg));
	msg.tcm_family = AF_UNSPEC;
	ll_init_map(&rth);
	while (*argv) {
		arg = index_in_substrings(args, *argv);
		if (arg == ARG_dev) {
			NEXT_ARG();
			if (dev)
				duparg2("dev", *argv);
			dev = *argv++;
			msg.tcm_ifindex = xll_name_to_index(dev);
			if (cmd >= CMD_show)
				filter_ifindex = msg.tcm_ifindex;
		} else if ((arg == ARG_qdisc && obj == OBJ_class && cmd >= CMD_show)
				   || (arg == ARG_handle && obj == OBJ_qdisc
					   && cmd == CMD_change)) {
			NEXT_ARG();
			/* We don't care about duparg2("qdisc handle",*argv) for now */
			if (get_qdisc_handle(&filter_qdisc, *argv))
				invarg(*argv, "qdisc");
		} else if (obj != OBJ_qdisc &&
				   (arg == ARG_root
					 || arg == ARG_parent
					 || (obj == OBJ_filter && arg >= ARG_pref))) {
		} else {
			invarg(*argv, "command");
		}
		NEXT_ARG();
		if (arg == ARG_root) {
			if (msg.tcm_parent)
				duparg("parent", *argv);
			msg.tcm_parent = TC_H_ROOT;
			if (obj == OBJ_filter)
				filter_parent = TC_H_ROOT;
		} else if (arg == ARG_parent) {
			__u32 handle;
			if (msg.tcm_parent)
				duparg(*argv, "parent");
			if (get_tc_classid(&handle, *argv))
				invarg(*argv, "parent");
			msg.tcm_parent = handle;
			if (obj == OBJ_filter)
				filter_parent = handle;
		} else if (arg == ARG_handle) { /* filter::list */
			if (msg.tcm_handle)
				duparg(*argv, "handle");
			/* reject LONG_MIN || LONG_MAX */
			/* TODO: for fw
			   if ((slash = strchr(handle, '/')) != NULL)
				   *slash = '\0';
			 */
			if (get_u32(&msg.tcm_handle, *argv, 0))
				invarg(*argv, "handle");
			/* if (slash) {if (get_u32(__u32 &mask, slash+1,0)) inv mask;addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
		} else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
		} else if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
			if (filter_prio)
				duparg(*argv, "priority");
			if (get_u32(&filter_prio, *argv, 0))
				invarg(*argv, "priority");
		} else if (arg == ARG_proto) { /* filter::list */
			__u16 tmp;
			if (filter_proto)
				duparg(*argv, "protocol");
			if (ll_proto_a2n(&tmp, *argv))
				invarg(*argv, "protocol");
			filter_proto = tmp;
		}
	}
	if (cmd >= CMD_show) { /* show or list */
		if (obj == OBJ_filter)
			msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
		if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
						obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
						&msg, sizeof(msg)) < 0)
			bb_simple_perror_msg_and_die("cannot send dump request");

		xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
						obj == OBJ_class ? print_class : print_filter,
						NULL);
	}
	if (ENABLE_FEATURE_CLEAN_UP) {
		rtnl_close(&rth);
	}
	return ret;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* tc.c "tc" utility frontend.
4	*
5	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
6	*
7	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
8	*
9	* Bernhard Reutner-Fischer adjusted for busybox
10	*/
11
12	#include "libbb.h"
13
14	#include "libiproute/utils.h"
15	#include "libiproute/ip_common.h"
16	#include "libiproute/rt_names.h"
17	#include <linux/pkt_sched.h> /* for the TC_H_* macros */
18
19	#define parse_rtattr_nested(tb, max, rta) \
20	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
21
22	/* nullifies tb on error */
23	#define __parse_rtattr_nested_compat(tb, max, rta, len) \
24	({if ((RTA_PAYLOAD(rta) >= len) && \
25	(RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr))) { \
26	rta = RTA_DATA(rta) + RTA_ALIGN(len); \
27	parse_rtattr_nested(tb, max, rta); \
28	} else \
29	memset(tb, 0, sizeof(struct rtattr ) (max + 1)); \
30	})
31
32	#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
33	({data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
34	__parse_rtattr_nested_compat(tb, max, rta, len); })
35
36	#define show_details (0) /* not implemented. Does anyone need it? */
37	#define use_iec (0) /* not currently documented in the upstream manpage */
38
39
40	struct globals {
41	int filter_ifindex;
42	__u32 filter_qdisc;
43	__u32 filter_parent;
44	__u32 filter_prio;
45	__u32 filter_proto;
46	};
47
48	#define G ((struct globals)&bb_common_bufsiz1)
49	#define filter_ifindex (G.filter_ifindex)
50	#define filter_qdisc (G.filter_qdisc)
51	#define filter_parent (G.filter_parent)
52	#define filter_prio (G.filter_prio)
53	#define filter_proto (G.filter_proto)
54
55	void BUG_tc_globals_too_big(void);
56	#define INIT_G() do { \
57	if (sizeof(G) > COMMON_BUFSIZE) \
58	BUG_tc_globals_too_big(); \
59	} while (0)
60
61	/* Allocates a buffer containing the name of a class id.
62	* The caller must free the returned memory. */
63	static char* print_tc_classid(uint32_t cid)
64	{
65	#if 0 /* IMPOSSIBLE */
66	if (cid == TC_H_ROOT)
67	return xasprintf("root");
68	else
69	#endif
70	if (cid == TC_H_UNSPEC)
71	return xasprintf("none");
72	else if (TC_H_MAJ(cid) == 0)
73	return xasprintf(":%x", TC_H_MIN(cid));
74	else if (TC_H_MIN(cid) == 0)
75	return xasprintf("%x:", TC_H_MAJ(cid)>>16);
76	else
77	return xasprintf("%x:%x", TC_H_MAJ(cid)>>16, TC_H_MIN(cid));
78	}
79
80	/* Get a qdisc handle. Return 0 on success, !0 otherwise. */
81	static int get_qdisc_handle(__u32 h, const char str) {
82	__u32 maj;
83	char *p;
84
85	maj = TC_H_UNSPEC;
86	if (!strcmp(str, "none"))
87	goto ok;
88	maj = strtoul(str, &p, 16);
89	if (p == str)
90	return 1;
91	maj <<= 16;
92	if (p != ':' && p!=0)
93	return 1;
94	ok:
95	*h = maj;
96	return 0;
97	}
98
99	/* Get class ID. Return 0 on success, !0 otherwise. */
100	static int get_tc_classid(__u32 h, const char str) {
101	__u32 maj, min;
102	char *p;
103
104	maj = TC_H_ROOT;
105	if (!strcmp(str, "root"))
106	goto ok;
107	maj = TC_H_UNSPEC;
108	if (!strcmp(str, "none"))
109	goto ok;
110	maj = strtoul(str, &p, 16);
111	if (p == str) {
112	if (*p != ':')
113	return 1;
114	maj = 0;
115	}
116	if (*p == ':') {
117	if (maj >= (1<<16))
118	return 1;
119	maj <<= 16;
120	str = p + 1;
121	min = strtoul(str, &p, 16);
122	if (*p != 0 \|\| min >= (1<<16))
123	return 1;
124	maj \|= min;
125	} else if (*p != 0)
126	return 1;
127	ok:
128	*h = maj;
129	return 0;
130	}
131
132	static void print_rate(char *buf, int len, uint32_t rate)
133	{
134	double tmp = (double)rate*8;
135
136	if (use_iec) {
137	if (tmp >= 1000.01024.01024.0)
138	snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
139	else if (tmp >= 1000.0*1024)
140	snprintf(buf, len, "%.0fKibit", tmp/1024);
141	else
142	snprintf(buf, len, "%.0fbit", tmp);
143	} else {
144	if (tmp >= 1000.0*1000000.0)
145	snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
146	else if (tmp >= 1000.0 * 1000.0)
147	snprintf(buf, len, "%.0fKbit", tmp/1000.0);
148	else
149	snprintf(buf, len, "%.0fbit", tmp);
150	}
151	}
152
153	/* This is "pfifo_fast". */
154	static int prio_parse_opt(int argc, char *argv, struct nlmsghdr n)
155	{
156	return 0;
157	}
158	static int prio_print_opt(struct rtattr *opt)
159	{
160	int i;
161	struct tc_prio_qopt *qopt;
162	struct rtattr *tb[TCA_PRIO_MAX+1];
163
164	if (opt == NULL)
165	return 0;
166	parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
167	if (tb == NULL)
168	return 0;
169	printf("bands %u priomap ", qopt->bands);
170	for (i=0; i<=TC_PRIO_MAX; i++)
171	printf(" %d", qopt->priomap[i]);
172
173	if (tb[TCA_PRIO_MQ])
174	printf(" multiqueue: o%s ",
175	(unsigned char )RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");
176
177	return 0;
178	}
179
180	/* Class Based Queue */
181	static int cbq_parse_opt(int argc, char *argv, struct nlmsghdr n)
182	{
183	return 0;
184	}
185	static int cbq_print_opt(struct rtattr *opt)
186	{
187	struct rtattr *tb[TCA_CBQ_MAX+1];
188	struct tc_ratespec *r = NULL;
189	struct tc_cbq_lssopt *lss = NULL;
190	struct tc_cbq_wrropt *wrr = NULL;
191	struct tc_cbq_fopt *fopt = NULL;
192	struct tc_cbq_ovl *ovl = NULL;
193	const char * const error = "CBQ: too short %s opt";
194	RESERVE_CONFIG_BUFFER(buf, 64);
195
196	if (opt == NULL)
197	goto done;
198	parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
199
200	if (tb[TCA_CBQ_RATE]) {
201	if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
202	bb_error_msg(error, "rate");
203	else
204	r = RTA_DATA(tb[TCA_CBQ_RATE]);
205	}
206	if (tb[TCA_CBQ_LSSOPT]) {
207	if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
208	bb_error_msg(error, "lss");
209	else
210	lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
211	}
212	if (tb[TCA_CBQ_WRROPT]) {
213	if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
214	bb_error_msg(error, "wrr");
215	else
216	wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
217	}
218	if (tb[TCA_CBQ_FOPT]) {
219	if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
220	bb_error_msg(error, "fopt");
221	else
222	fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
223	}
224	if (tb[TCA_CBQ_OVL_STRATEGY]) {
225	if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
226	bb_error_msg("CBQ: too short overlimit strategy %u/%u",
227	(unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
228	(unsigned) sizeof(*ovl));
229	else
230	ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
231	}
232
233	if (r) {
234	print_rate(buf, sizeof(buf), r->rate);
235	printf("rate %s ", buf);
236	if (show_details) {
237	printf("cell %ub ", 1<<r->cell_log);
238	if (r->mpu)
239	printf("mpu %ub ", r->mpu);
240	if (r->overhead)
241	printf("overhead %ub ", r->overhead);
242	}
243	}
244	if (lss && lss->flags) {
245	bool comma = false;
246	bb_putchar('(');
247	if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
248	printf("bounded");
249	comma = true;
250	}
251	if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
252	if (comma)
253	bb_putchar(',');
254	printf("isolated");
255	}
256	printf(") ");
257	}
258	if (wrr) {
259	if (wrr->priority != TC_CBQ_MAXPRIO)
260	printf("prio %u", wrr->priority);
261	else
262	printf("prio no-transmit");
263	if (show_details) {
264	printf("/%u ", wrr->cpriority);
265	if (wrr->weight != 1) {
266	print_rate(buf, sizeof(buf), wrr->weight);
267	printf("weight %s ", buf);
268	}
269	if (wrr->allot)
270	printf("allot %ub ", wrr->allot);
271	}
272	}
273	done:
274	RELEASE_CONFIG_BUFFER(buf);
275	return 0;
276	}
277
278	static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
279	struct nlmsghdr hdr, void arg UNUSED_PARAM)
280	{
281	struct tcmsg *msg = NLMSG_DATA(hdr);
282	int len = hdr->nlmsg_len;
283	struct rtattr * tb[TCA_MAX+1];
284	char *name;
285
286	if (hdr->nlmsg_type != RTM_NEWQDISC && hdr->nlmsg_type != RTM_DELQDISC) {
287	/* bb_error_msg("Not a qdisc"); */
288	return 0; /* ??? mimic upstream; should perhaps return -1 */
289	}
290	len -= NLMSG_LENGTH(sizeof(*msg));
291	if (len < 0) {
292	/* bb_error_msg("Wrong len %d", len); */
293	return -1;
294	}
295	/* not the desired interface? */
296	if (filter_ifindex && filter_ifindex != msg->tcm_ifindex)
297	return 0;
298	memset (tb, 0, sizeof(tb));
299	parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
300	if (tb[TCA_KIND] == NULL) {
301	/* bb_error_msg("%s: NULL kind", "qdisc"); */
302	return -1;
303	}
304	if (hdr->nlmsg_type == RTM_DELQDISC)
305	printf("deleted ");
306	name = (char*)RTA_DATA(tb[TCA_KIND]);
307	printf("qdisc %s %x: ", name, msg->tcm_handle>>16);
308	if (filter_ifindex == 0)
309	printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
310	if (msg->tcm_parent == TC_H_ROOT)
311	printf("root ");
312	else if (msg->tcm_parent) {
313	char *classid = print_tc_classid(msg->tcm_parent);
314	printf("parent %s ", classid);
315	if (ENABLE_FEATURE_CLEAN_UP)
316	free(classid);
317	}
318	if (msg->tcm_info != 1)
319	printf("refcnt %d ", msg->tcm_info);
320	if (tb[TCA_OPTIONS]) {
321	static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
322	int qqq = index_in_strings(_q_, name);
323	if (qqq == 0) { /* pfifo_fast aka prio */
324	prio_print_opt(tb[TCA_OPTIONS]);
325	} else if (qqq == 1) { /* class based queueing */
326	cbq_print_opt(tb[TCA_OPTIONS]);
327	} else
328	bb_error_msg("unknown %s", name);
329	}
330	bb_putchar('\n');
331	return 0;
332	}
333
334	static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
335	struct nlmsghdr hdr, void arg UNUSED_PARAM)
336	{
337	struct tcmsg *msg = NLMSG_DATA(hdr);
338	int len = hdr->nlmsg_len;
339	struct rtattr * tb[TCA_MAX+1];
340	char name, classid;
341
342	/XXX Eventually factor out common code /
343
344	if (hdr->nlmsg_type != RTM_NEWTCLASS && hdr->nlmsg_type != RTM_DELTCLASS) {
345	/* bb_error_msg("Not a class"); */
346	return 0; /* ??? mimic upstream; should perhaps return -1 */
347	}
348	len -= NLMSG_LENGTH(sizeof(*msg));
349	if (len < 0) {
350	/* bb_error_msg("Wrong len %d", len); */
351	return -1;
352	}
353	/* not the desired interface? */
354	if (filter_qdisc && TC_H_MAJ(msg->tcm_handle^filter_qdisc))
355	return 0;
356	memset (tb, 0, sizeof(tb));
357	parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
358	if (tb[TCA_KIND] == NULL) {
359	/* bb_error_msg("%s: NULL kind", "class"); */
360	return -1;
361	}
362	if (hdr->nlmsg_type == RTM_DELTCLASS)
363	printf("deleted ");
364
365	name = (char*)RTA_DATA(tb[TCA_KIND]);
366	classid = !msg->tcm_handle ? NULL : print_tc_classid(
367	filter_qdisc ? TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
368	printf ("class %s %s", name, classid);
369	if (ENABLE_FEATURE_CLEAN_UP)
370	free(classid);
371
372	if (filter_ifindex == 0)
373	printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
374	if (msg->tcm_parent == TC_H_ROOT)
375	printf("root ");
376	else if (msg->tcm_parent) {
377	classid = print_tc_classid(filter_qdisc ?
378	TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
379	printf("parent %s ", classid);
380	if (ENABLE_FEATURE_CLEAN_UP)
381	free(classid);
382	}
383	if (msg->tcm_info)
384	printf("leaf %x ", msg->tcm_info >> 16);
385	/* Do that get_qdisc_kind(RTA_DATA(tb[TCA_KIND])). */
386	if (tb[TCA_OPTIONS]) {
387	static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
388	int qqq = index_in_strings(_q_, name);
389	if (qqq == 0) { /* pfifo_fast aka prio */
390	/* nothing. / /prio_print_opt(tb[TCA_OPTIONS]);*/
391	} else if (qqq == 1) { /* class based queueing */
392	/* cbq_print_copt() is identical to cbq_print_opt(). */
393	cbq_print_opt(tb[TCA_OPTIONS]);
394	} else
395	bb_error_msg("unknown %s", name);
396	}
397	bb_putchar('\n');
398
399	return 0;
400	}
401
402	static int print_filter(const struct sockaddr_nl *who UNUSED_PARAM,
403	struct nlmsghdr hdr, void arg UNUSED_PARAM)
404	{
405	struct tcmsg *msg = NLMSG_DATA(hdr);
406	int len = hdr->nlmsg_len;
407	struct rtattr * tb[TCA_MAX+1];
408	return 0;
409	}
410
411	int tc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
412	int tc_main(int argc UNUSED_PARAM, char **argv)
413	{
414	static const char objects[] ALIGN1 =
415	"qdisc\0""class\0""filter\0"
416	;
417	enum { OBJ_qdisc = 0, OBJ_class, OBJ_filter };
418	static const char commands[] ALIGN1 =
419	"add\0""delete\0""change\0"
420	"link\0" /* only qdisc */
421	"replace\0"
422	"show\0""list\0"
423	;
424	static const char args[] ALIGN1 =
425	"dev\0" /* qdisc, class, filter */
426	"root\0" /* class, filter */
427	"parent\0" /* class, filter */
428	"qdisc\0" /* class */
429	"handle\0" /* change: qdisc, class(classid) list: filter */
430	"classid\0" /* change: for class use "handle" */
431	"preference\0""priority\0""protocol\0" /* filter */
432	;
433	enum { CMD_add = 0, CMD_del, CMD_change, CMD_link, CMD_replace, CMD_show };
434	enum { ARG_dev = 0, ARG_root, ARG_parent, ARG_qdisc,
435	ARG_handle, ARG_classid, ARG_pref, ARG_prio, ARG_proto};
436	struct rtnl_handle rth;
437	struct tcmsg msg;
438	int ret, obj, cmd, arg;
439	char *dev = NULL;
440
441	INIT_G();
442
443	if (!*++argv)
444	bb_show_usage();
445	xrtnl_open(&rth);
446	ret = EXIT_SUCCESS;
447
448	obj = index_in_substrings(objects, *argv++);
449
450	if (obj < OBJ_qdisc)
451	bb_show_usage();
452	if (!*argv)
453	cmd = CMD_show; /* list is the default */
454	else {
455	cmd = index_in_substrings(commands, *argv);
456	if (cmd < 0)
457	bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
458	argv++;
459	}
460	memset(&msg, 0, sizeof(msg));
461	msg.tcm_family = AF_UNSPEC;
462	ll_init_map(&rth);
463	while (*argv) {
464	arg = index_in_substrings(args, *argv);
465	if (arg == ARG_dev) {
466	NEXT_ARG();
467	if (dev)
468	duparg2("dev", *argv);
469	dev = *argv++;
470	msg.tcm_ifindex = xll_name_to_index(dev);
471	if (cmd >= CMD_show)
472	filter_ifindex = msg.tcm_ifindex;
473	} else if ((arg == ARG_qdisc && obj == OBJ_class && cmd >= CMD_show)
474	\|\| (arg == ARG_handle && obj == OBJ_qdisc
475	&& cmd == CMD_change)) {
476	NEXT_ARG();
477	/* We don't care about duparg2("qdisc handle",argv) for now /
478	if (get_qdisc_handle(&filter_qdisc, *argv))
479	invarg(*argv, "qdisc");
480	} else if (obj != OBJ_qdisc &&
481	(arg == ARG_root
482	\|\| arg == ARG_parent
483	\|\| (obj == OBJ_filter && arg >= ARG_pref))) {
484	} else {
485	invarg(*argv, "command");
486	}
487	NEXT_ARG();
488	if (arg == ARG_root) {
489	if (msg.tcm_parent)
490	duparg("parent", *argv);
491	msg.tcm_parent = TC_H_ROOT;
492	if (obj == OBJ_filter)
493	filter_parent = TC_H_ROOT;
494	} else if (arg == ARG_parent) {
495	__u32 handle;
496	if (msg.tcm_parent)
497	duparg(*argv, "parent");
498	if (get_tc_classid(&handle, *argv))
499	invarg(*argv, "parent");
500	msg.tcm_parent = handle;
501	if (obj == OBJ_filter)
502	filter_parent = handle;
503	} else if (arg == ARG_handle) { /* filter::list */
504	if (msg.tcm_handle)
505	duparg(*argv, "handle");
506	/* reject LONG_MIN \|\| LONG_MAX */
507	/* TODO: for fw
508	if ((slash = strchr(handle, '/')) != NULL)
509	*slash = '\0';
510	*/
511	if (get_u32(&msg.tcm_handle, *argv, 0))
512	invarg(*argv, "handle");
513	/* if (slash) {if (get_u32(__u32 &mask, slash+1,0)) inv mask;addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
514	} else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
515	} else if (arg == ARG_pref \|\| arg == ARG_prio) { /* filter::list */
516	if (filter_prio)
517	duparg(*argv, "priority");
518	if (get_u32(&filter_prio, *argv, 0))
519	invarg(*argv, "priority");
520	} else if (arg == ARG_proto) { /* filter::list */
521	__u16 tmp;
522	if (filter_proto)
523	duparg(*argv, "protocol");
524	if (ll_proto_a2n(&tmp, *argv))
525	invarg(*argv, "protocol");
526	filter_proto = tmp;
527	}
528	}
529	if (cmd >= CMD_show) { /* show or list */
530	if (obj == OBJ_filter)
531	msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
532	if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
533	obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
534	&msg, sizeof(msg)) < 0)
535	bb_simple_perror_msg_and_die("cannot send dump request");
536
537	xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
538	obj == OBJ_class ? print_class : print_filter,
539	NULL);
540	}
541	if (ENABLE_FEATURE_CLEAN_UP) {
542	rtnl_close(&rth);
543	}
544	return ret;
545	}