--- /dev/null
+/* 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 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;
+}
projects / oweals / busybox.git / commitdiff