--- /dev/null
+/*
+ * tc_util.c Misc TC utility functions.
+ *
+ * This program is free software; you can redistribute 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#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 <math.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+int get_qdisc_handle(__u32 *h, const char *str)
+{
+ __u32 maj;
+ char *p;
+
+ maj = TC_H_UNSPEC;
+ if (strcmp(str, "none") == 0)
+ 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;
+}
+
+int get_tc_classid(__u32 *h, const char *str)
+{
+ __u32 maj, min;
+ char *p;
+
+ maj = TC_H_ROOT;
+ if (strcmp(str, "root") == 0)
+ goto ok;
+ maj = TC_H_UNSPEC;
+ if (strcmp(str, "none") == 0)
+ goto ok;
+ maj = strtoul(str, &p, 16);
+ if (p == str) {
+ maj = 0;
+ if (*p != ':')
+ return -1;
+ }
+ if (*p == ':') {
+ if (maj >= (1<<16))
+ return -1;
+ maj <<= 16;
+ str = p+1;
+ min = strtoul(str, &p, 16);
+ if (*p != 0)
+ return -1;
+ if (min >= (1<<16))
+ return -1;
+ maj |= min;
+ } else if (*p != 0)
+ return -1;
+
+ok:
+ *h = maj;
+ return 0;
+}
+
+int print_tc_classid(char *buf, int len, __u32 h)
+{
+ if (h == TC_H_ROOT)
+ sprintf(buf, "root");
+ else if (h == TC_H_UNSPEC)
+ snprintf(buf, len, "none");
+ else if (TC_H_MAJ(h) == 0)
+ snprintf(buf, len, ":%x", TC_H_MIN(h));
+ else if (TC_H_MIN(h) == 0)
+ snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
+ else
+ snprintf(buf, len, "%x:%x", TC_H_MAJ(h)>>16, TC_H_MIN(h));
+ return 0;
+}
+
+char * sprint_tc_classid(__u32 h, char *buf)
+{
+ if (print_tc_classid(buf, SPRINT_BSIZE-1, h))
+ strcpy(buf, "???");
+ return buf;
+}
+
+/* See http://physics.nist.gov/cuu/Units/binary.html */
+static const struct rate_suffix {
+ const char *name;
+ double scale;
+} suffixes[] = {
+ { "bit", 1. },
+ { "Kibit", 1024. },
+ { "kbit", 1000. },
+ { "mibit", 1024.*1024. },
+ { "mbit", 1000000. },
+ { "gibit", 1024.*1024.*1024. },
+ { "gbit", 1000000000. },
+ { "tibit", 1024.*1024.*1024.*1024. },
+ { "tbit", 1000000000000. },
+ { "Bps", 8. },
+ { "KiBps", 8.*1024. },
+ { "KBps", 8000. },
+ { "MiBps", 8.*1024*1024. },
+ { "MBps", 8000000. },
+ { "GiBps", 8.*1024.*1024.*1024. },
+ { "GBps", 8000000000. },
+ { "TiBps", 8.*1024.*1024.*1024.*1024. },
+ { "TBps", 8000000000000. },
+ { NULL }
+};
+
+
+int get_rate(unsigned *rate, const char *str)
+{
+ char *p;
+ double bps = strtod(str, &p);
+ const struct rate_suffix *s;
+
+ if (p == str)
+ return -1;
+
+ if (*p == '\0') {
+ *rate = bps / 8.; /* assume bytes/sec */
+ return 0;
+ }
+
+ for (s = suffixes; s->name; ++s) {
+ if (strcasecmp(s->name, p) == 0) {
+ *rate = (bps * s->scale) / 8.;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+int get_rate_and_cell(unsigned *rate, int *cell_log, char *str)
+{
+ char * slash = strchr(str, '/');
+
+ if (slash)
+ *slash = 0;
+
+ if (get_rate(rate, str))
+ return -1;
+
+ if (slash) {
+ int cell;
+ int i;
+
+ if (get_integer(&cell, slash+1, 0))
+ return -1;
+ *slash = '/';
+
+ for (i=0; i<32; i++) {
+ if ((1<<i) == cell) {
+ *cell_log = i;
+ return 0;
+ }
+ }
+ return -1;
+ }
+ return 0;
+}
+
+void print_rate(char *buf, int len, __u32 rate)
+{
+ double tmp = (double)rate*8;
+ extern int use_iec;
+
+ 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);
+ }
+}
+
+char * sprint_rate(__u32 rate, char *buf)
+{
+ print_rate(buf, SPRINT_BSIZE-1, rate);
+ return buf;
+}
+
+int get_usecs(unsigned *usecs, const char *str)
+{
+ double t;
+ char *p;
+
+ t = strtod(str, &p);
+ if (p == str)
+ return -1;
+
+ if (*p) {
+ if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
+ strcasecmp(p, "secs")==0)
+ t *= 1000000;
+ else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
+ strcasecmp(p, "msecs") == 0)
+ t *= 1000;
+ else if (strcasecmp(p, "us") == 0 || strcasecmp(p, "usec")==0 ||
+ strcasecmp(p, "usecs") == 0)
+ t *= 1;
+ else
+ return -1;
+ }
+
+ *usecs = t;
+ return 0;
+}
+
+
+void print_usecs(char *buf, int len, __u32 usec)
+{
+ double tmp = usec;
+
+ if (tmp >= 1000000)
+ snprintf(buf, len, "%.1fs", tmp/1000000);
+ else if (tmp >= 1000)
+ snprintf(buf, len, "%.1fms", tmp/1000);
+ else
+ snprintf(buf, len, "%uus", usec);
+}
+
+char * sprint_usecs(__u32 usecs, char *buf)
+{
+ print_usecs(buf, SPRINT_BSIZE-1, usecs);
+ return buf;
+}
+
+int get_size(unsigned *size, const char *str)
+{
+ double sz;
+ char *p;
+
+ sz = strtod(str, &p);
+ if (p == str)
+ return -1;
+
+ if (*p) {
+ if (strcasecmp(p, "kb") == 0 || strcasecmp(p, "k")==0)
+ sz *= 1024;
+ else if (strcasecmp(p, "gb") == 0 || strcasecmp(p, "g")==0)
+ sz *= 1024*1024*1024;
+ else if (strcasecmp(p, "gbit") == 0)
+ sz *= 1024*1024*1024/8;
+ else if (strcasecmp(p, "mb") == 0 || strcasecmp(p, "m")==0)
+ sz *= 1024*1024;
+ else if (strcasecmp(p, "mbit") == 0)
+ sz *= 1024*1024/8;
+ else if (strcasecmp(p, "kbit") == 0)
+ sz *= 1024/8;
+ else if (strcasecmp(p, "b") != 0)
+ return -1;
+ }
+
+ *size = sz;
+ return 0;
+}
+
+int get_size_and_cell(unsigned *size, int *cell_log, char *str)
+{
+ char * slash = strchr(str, '/');
+
+ if (slash)
+ *slash = 0;
+
+ if (get_size(size, str))
+ return -1;
+
+ if (slash) {
+ int cell;
+ int i;
+
+ if (get_integer(&cell, slash+1, 0))
+ return -1;
+ *slash = '/';
+
+ for (i=0; i<32; i++) {
+ if ((1<<i) == cell) {
+ *cell_log = i;
+ return 0;
+ }
+ }
+ return -1;
+ }
+ return 0;
+}
+
+void print_size(char *buf, int len, __u32 sz)
+{
+ double tmp = sz;
+
+ if (sz >= 1024*1024 && fabs(1024*1024*rint(tmp/(1024*1024)) - sz) < 1024)
+ snprintf(buf, len, "%gMb", rint(tmp/(1024*1024)));
+ else if (sz >= 1024 && fabs(1024*rint(tmp/1024) - sz) < 16)
+ snprintf(buf, len, "%gKb", rint(tmp/1024));
+ else
+ snprintf(buf, len, "%ub", sz);
+}
+
+char * sprint_size(__u32 size, char *buf)
+{
+ print_size(buf, SPRINT_BSIZE-1, size);
+ return buf;
+}
+
+static const double max_percent_value = 0xffffffff;
+
+int get_percent(__u32 *percent, const char *str)
+{
+ char *p;
+ double per = strtod(str, &p) / 100.;
+
+ if (per > 1. || per < 0)
+ return -1;
+ if (*p && strcmp(p, "%"))
+ return -1;
+
+ *percent = (unsigned) rint(per * max_percent_value);
+ return 0;
+}
+
+void print_percent(char *buf, int len, __u32 per)
+{
+ snprintf(buf, len, "%g%%", 100. * (double) per / max_percent_value);
+}
+
+char * sprint_percent(__u32 per, char *buf)
+{
+ print_percent(buf, SPRINT_BSIZE-1, per);
+ return buf;
+}
+
+void print_qdisc_handle(char *buf, int len, __u32 h)
+{
+ snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
+}
+
+char * sprint_qdisc_handle(__u32 h, char *buf)
+{
+ print_qdisc_handle(buf, SPRINT_BSIZE-1, h);
+ return buf;
+}
+
+char * action_n2a(int action, char *buf, int len)
+{
+ switch (action) {
+ case -1:
+ return "continue";
+ break;
+ case TC_ACT_OK:
+ return "pass";
+ break;
+ case TC_ACT_SHOT:
+ return "drop";
+ break;
+ case TC_ACT_RECLASSIFY:
+ return "reclassify";
+ case TC_ACT_PIPE:
+ return "pipe";
+ case TC_ACT_STOLEN:
+ return "stolen";
+ default:
+ snprintf(buf, len, "%d", action);
+ return buf;
+ }
+}
+
+int action_a2n(char *arg, int *result)
+{
+ int res;
+
+ if (matches(arg, "continue") == 0)
+ res = -1;
+ else if (matches(arg, "drop") == 0)
+ res = TC_ACT_SHOT;
+ else if (matches(arg, "shot") == 0)
+ res = TC_ACT_SHOT;
+ else if (matches(arg, "pass") == 0)
+ res = TC_ACT_OK;
+ else if (strcmp(arg, "ok") == 0)
+ res = TC_ACT_OK;
+ else if (matches(arg, "reclassify") == 0)
+ res = TC_ACT_RECLASSIFY;
+ else {
+ char dummy;
+ if (sscanf(arg, "%d%c", &res, &dummy) != 1)
+ return -1;
+ }
+ *result = res;
+ return 0;
+}
+
+void print_tm(FILE * f, const struct tcf_t *tm)
+{
+ int hz = get_user_hz();
+ if (tm->install != 0)
+ fprintf(f, " installed %u sec", (unsigned)(tm->install/hz));
+ if (tm->lastuse != 0)
+ fprintf(f, " used %u sec", (unsigned)(tm->lastuse/hz));
+ if (tm->expires != 0)
+ fprintf(f, " expires %u sec", (unsigned)(tm->expires/hz));
+}
+
+void print_tcstats2_attr(FILE *fp, struct rtattr *rta, char *prefix, struct rtattr **xstats)
+{
+ SPRINT_BUF(b1);
+ struct rtattr *tbs[TCA_STATS_MAX + 1];
+
+ parse_rtattr_nested(tbs, TCA_STATS_MAX, rta);
+
+ if (tbs[TCA_STATS_BASIC]) {
+ struct gnet_stats_basic bs = {0};
+ memcpy(&bs, RTA_DATA(tbs[TCA_STATS_BASIC]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_BASIC]), sizeof(bs)));
+ fprintf(fp, "%sSent %llu bytes %u pkt",
+ prefix, (unsigned long long) bs.bytes, bs.packets);
+ }
+
+ if (tbs[TCA_STATS_QUEUE]) {
+ struct gnet_stats_queue q = {0};
+ memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
+ fprintf(fp, " (dropped %u, overlimits %u requeues %u) ",
+ q.drops, q.overlimits, q.requeues);
+ }
+
+ if (tbs[TCA_STATS_RATE_EST]) {
+ struct gnet_stats_rate_est re = {0};
+ memcpy(&re, RTA_DATA(tbs[TCA_STATS_RATE_EST]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_RATE_EST]), sizeof(re)));
+ fprintf(fp, "\n%srate %s %upps ",
+ prefix, sprint_rate(re.bps, b1), re.pps);
+ }
+
+ if (tbs[TCA_STATS_QUEUE]) {
+ struct gnet_stats_queue q = {0};
+ memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
+ if (!tbs[TCA_STATS_RATE_EST])
+ fprintf(fp, "\n%s", prefix);
+ fprintf(fp, "backlog %s %up requeues %u ",
+ sprint_size(q.backlog, b1), q.qlen, q.requeues);
+ }
+
+ if (xstats)
+ *xstats = tbs[TCA_STATS_APP] ? : NULL;
+}
+
+void print_tcstats_attr(FILE *fp, struct rtattr *tb[], char *prefix, struct rtattr **xstats)
+{
+ SPRINT_BUF(b1);
+
+ if (tb[TCA_STATS2]) {
+ print_tcstats2_attr(fp, tb[TCA_STATS2], prefix, xstats);
+ if (xstats && NULL == *xstats)
+ goto compat_xstats;
+ return;
+ }
+ /* backward compatibility */
+ if (tb[TCA_STATS]) {
+ struct tc_stats st;
+
+ /* handle case where kernel returns more/less than we know about */
+ memset(&st, 0, sizeof(st));
+ memcpy(&st, RTA_DATA(tb[TCA_STATS]), MIN(RTA_PAYLOAD(tb[TCA_STATS]), sizeof(st)));
+
+ fprintf(fp, "%sSent %llu bytes %u pkts (dropped %u, overlimits %u) ",
+ prefix, (unsigned long long)st.bytes, st.packets, st.drops,
+ st.overlimits);
+
+ if (st.bps || st.pps || st.qlen || st.backlog) {
+ fprintf(fp, "\n%s", prefix);
+ if (st.bps || st.pps) {
+ fprintf(fp, "rate ");
+ if (st.bps)
+ fprintf(fp, "%s ", sprint_rate(st.bps, b1));
+ if (st.pps)
+ fprintf(fp, "%upps ", st.pps);
+ }
+ if (st.qlen || st.backlog) {
+ fprintf(fp, "backlog ");
+ if (st.backlog)
+ fprintf(fp, "%s ", sprint_size(st.backlog, b1));
+ if (st.qlen)
+ fprintf(fp, "%up ", st.qlen);
+ }
+ }
+ }
+
+compat_xstats:
+ if (tb[TCA_XSTATS] && xstats)
+ *xstats = tb[TCA_XSTATS];
+}
+
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