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);
//FIXME: check for "" too?
		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";
	char 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:
	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 queuing */
			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 queuing */
			/* 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';
			 */
			msg.tcm_handle = get_u32(*argv, "handle");
			/* if (slash) {if (get_u32(__u32 &mask, slash+1, NULL)) 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");
			filter_prio = get_u32(*argv, "priority");
		} else if (arg == ARG_proto) { /* filter::list */
			uint16_t 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("can't 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	niro	816	/* 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	niro	984	if (p != ':' && p != '\0')
93	niro	816	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	niro	984	//FIXME: check for "" too?
123			if (*p != '\0' \|\| min >= (1<<16))
124	niro	816	return 1;
125			maj \|= min;
126			} else if (*p != 0)
127			return 1;
128			ok:
129			*h = maj;
130			return 0;
131			}
132
133			static void print_rate(char *buf, int len, uint32_t rate)
134			{
135			double tmp = (double)rate*8;
136
137			if (use_iec) {
138			if (tmp >= 1000.01024.01024.0)
139			snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
140			else if (tmp >= 1000.0*1024)
141			snprintf(buf, len, "%.0fKibit", tmp/1024);
142			else
143			snprintf(buf, len, "%.0fbit", tmp);
144			} else {
145			if (tmp >= 1000.0*1000000.0)
146			snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
147			else if (tmp >= 1000.0 * 1000.0)
148			snprintf(buf, len, "%.0fKbit", tmp/1000.0);
149			else
150			snprintf(buf, len, "%.0fbit", tmp);
151			}
152			}
153
154			/* This is "pfifo_fast". */
155			static int prio_parse_opt(int argc, char *argv, struct nlmsghdr n)
156			{
157			return 0;
158			}
159			static int prio_print_opt(struct rtattr *opt)
160			{
161			int i;
162			struct tc_prio_qopt *qopt;
163			struct rtattr *tb[TCA_PRIO_MAX+1];
164
165			if (opt == NULL)
166			return 0;
167			parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
168			if (tb == NULL)
169			return 0;
170			printf("bands %u priomap ", qopt->bands);
171			for (i=0; i<=TC_PRIO_MAX; i++)
172			printf(" %d", qopt->priomap[i]);
173
174			if (tb[TCA_PRIO_MQ])
175			printf(" multiqueue: o%s ",
176			(unsigned char )RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");
177
178			return 0;
179			}
180
181			/* Class Based Queue */
182			static int cbq_parse_opt(int argc, char *argv, struct nlmsghdr n)
183			{
184			return 0;
185			}
186			static int cbq_print_opt(struct rtattr *opt)
187			{
188			struct rtattr *tb[TCA_CBQ_MAX+1];
189			struct tc_ratespec *r = NULL;
190			struct tc_cbq_lssopt *lss = NULL;
191			struct tc_cbq_wrropt *wrr = NULL;
192			struct tc_cbq_fopt *fopt = NULL;
193			struct tc_cbq_ovl *ovl = NULL;
194	niro	984	const char *const error = "CBQ: too short %s opt";
195			char buf[64];
196	niro	816
197			if (opt == NULL)
198			goto done;
199			parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
200
201			if (tb[TCA_CBQ_RATE]) {
202			if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
203			bb_error_msg(error, "rate");
204			else
205			r = RTA_DATA(tb[TCA_CBQ_RATE]);
206			}
207			if (tb[TCA_CBQ_LSSOPT]) {
208			if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
209			bb_error_msg(error, "lss");
210			else
211			lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
212			}
213			if (tb[TCA_CBQ_WRROPT]) {
214			if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
215			bb_error_msg(error, "wrr");
216			else
217			wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
218			}
219			if (tb[TCA_CBQ_FOPT]) {
220			if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
221			bb_error_msg(error, "fopt");
222			else
223			fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
224			}
225			if (tb[TCA_CBQ_OVL_STRATEGY]) {
226			if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
227			bb_error_msg("CBQ: too short overlimit strategy %u/%u",
228			(unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
229			(unsigned) sizeof(*ovl));
230			else
231			ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
232			}
233
234			if (r) {
235			print_rate(buf, sizeof(buf), r->rate);
236			printf("rate %s ", buf);
237			if (show_details) {
238			printf("cell %ub ", 1<<r->cell_log);
239			if (r->mpu)
240			printf("mpu %ub ", r->mpu);
241			if (r->overhead)
242			printf("overhead %ub ", r->overhead);
243			}
244			}
245			if (lss && lss->flags) {
246			bool comma = false;
247			bb_putchar('(');
248			if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
249			printf("bounded");
250			comma = true;
251			}
252			if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
253			if (comma)
254			bb_putchar(',');
255			printf("isolated");
256			}
257			printf(") ");
258			}
259			if (wrr) {
260			if (wrr->priority != TC_CBQ_MAXPRIO)
261			printf("prio %u", wrr->priority);
262			else
263			printf("prio no-transmit");
264			if (show_details) {
265			printf("/%u ", wrr->cpriority);
266			if (wrr->weight != 1) {
267			print_rate(buf, sizeof(buf), wrr->weight);
268			printf("weight %s ", buf);
269			}
270			if (wrr->allot)
271			printf("allot %ub ", wrr->allot);
272			}
273			}
274			done:
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	niro	984	/* bb_error_msg("not a qdisc"); */
288	niro	816	return 0; /* ??? mimic upstream; should perhaps return -1 */
289			}
290			len -= NLMSG_LENGTH(sizeof(*msg));
291			if (len < 0) {
292	niro	984	/* bb_error_msg("wrong len %d", len); */
293	niro	816	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	niro	984	} else if (qqq == 1) { /* class based queuing */
326	niro	816	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	niro	984	/* bb_error_msg("not a class"); */
346	niro	816	return 0; /* ??? mimic upstream; should perhaps return -1 */
347			}
348			len -= NLMSG_LENGTH(sizeof(*msg));
349			if (len < 0) {
350	niro	984	/* bb_error_msg("wrong len %d", len); */
351	niro	816	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	niro	984	} else if (qqq == 1) { /* class based queuing */
392	niro	816	/* 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	niro	984	msg.tcm_handle = get_u32(*argv, "handle");
512			/* if (slash) {if (get_u32(__u32 &mask, slash+1, NULL)) inv mask; addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
513	niro	816	} else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
514			} else if (arg == ARG_pref \|\| arg == ARG_prio) { /* filter::list */
515			if (filter_prio)
516			duparg(*argv, "priority");
517	niro	984	filter_prio = get_u32(*argv, "priority");
518	niro	816	} else if (arg == ARG_proto) { /* filter::list */
519	niro	984	uint16_t tmp;
520	niro	816	if (filter_proto)
521			duparg(*argv, "protocol");
522			if (ll_proto_a2n(&tmp, *argv))
523			invarg(*argv, "protocol");
524			filter_proto = tmp;
525			}
526			}
527			if (cmd >= CMD_show) { /* show or list */
528			if (obj == OBJ_filter)
529			msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
530			if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
531			obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
532			&msg, sizeof(msg)) < 0)
533	niro	984	bb_simple_perror_msg_and_die("can't send dump request");
534	niro	816
535			xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
536			obj == OBJ_class ? print_class : print_filter,
537			NULL);
538			}
539			if (ENABLE_FEATURE_CLEAN_UP) {
540			rtnl_close(&rth);
541			}
542			return ret;
543			}