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/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* Bernhard Reutner-Fischer adjusted for busybox
*/
//usage:#define tc_trivial_usage
/* //usage: "[OPTIONS] OBJECT CMD [dev STRING]" */
//usage: "OBJECT CMD [dev STRING]"
//usage:#define tc_full_usage "\n\n"
//usage: "OBJECT: {qdisc|class|filter}\n"
//usage: "CMD: {add|del|change|replace|show}\n"
//usage: "\n"
//usage: "qdisc [ handle QHANDLE ] [ root |"IF_FEATURE_TC_INGRESS(" ingress |")" parent CLASSID ]\n"
/* //usage: "[ estimator INTERVAL TIME_CONSTANT ]\n" */
//usage: " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
//usage: " QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"
//usage: "qdisc show [ dev STRING ]"IF_FEATURE_TC_INGRESS(" [ingress]")"\n"
//usage: "class [ classid CLASSID ] [ root | parent CLASSID ]\n"
//usage: " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
//usage: "class show [ dev STRING ] [ root | parent CLASSID ]\n"
//usage: "filter [ pref PRIO ] [ protocol PROTO ]\n"
/* //usage: "\t[ estimator INTERVAL TIME_CONSTANT ]\n" */
//usage: " [ root | classid CLASSID ] [ handle FILTERID ]\n"
//usage: " [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n"
//usage: "filter show [ dev STRING ] [ root | parent CLASSID ]"
#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;
uint32_t filter_qdisc;
uint32_t filter_parent;
uint32_t filter_prio;
uint32_t filter_proto;
} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
struct BUG_G_too_big {
char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
};
#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)
#define INIT_G() do { } 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(uint32_t *h, const char *str) {
uint32_t 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(uint32_t *h, const char *str) {
uint32_t 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)
)
) {
/* nothing */
} 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) {
uint32_t 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(uint32_t &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;
}
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