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Cleanup cli for new version.
2004/08/09 16:46:47-07:00 osdl.net!shemminger Add distribution table loading (undebugged as yet). (Logical change 1.71)
This commit is contained in:
parent
f307c24e2f
commit
b7be3d0cd2
193
tc/q_netem.c
193
tc/q_netem.c
@ -19,16 +19,21 @@
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <errno.h>
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#include "utils.h"
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#include "tc_util.h"
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#include "tc_common.h"
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static void explain(void)
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{
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fprintf(stderr,
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"Usage: ... netem latency TIME [ jitter TIME ] [ limit PACKETS] \n" \
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" [ loss PERCENT ] [ duplicate PERCENT ]\n" \
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" [ gap PACKETS]\n");
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"Usage: ... netem [ limit PACKETS ] \n" \
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" [ delay TIME [ JITTER [CORRELATION]]]\n" \
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" [ drop PERCENT [CORRELATION]] \n" \
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" [ duplicate PERCENT [CORRELATION]]\n" \
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" [ distribution {uniform|normal|pareto|paretonormal} ]\n" \
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" [ gap PACKETS ]\n");
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}
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static void explain1(const char *arg)
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@ -38,59 +43,158 @@ static void explain1(const char *arg)
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#define usage() return(-1)
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static int get_distribution(const char *type, __s16 *data, int limit)
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{
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FILE *f;
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int n;
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char *p, *endp, buf[256];
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snprintf(buf, 256, "/usr/lib/tc/%s.dist", type);
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f = fopen(buf, "r");
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if (!f) {
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fprintf(stderr, "No distribution data for %s (%s: %s)\n",
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type, buf, strerror(errno));
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return -1;
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}
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n = 0;
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while (fgets(buf, sizeof(buf), f) != NULL) {
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if (*buf == '#')
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continue;
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for (p = buf; *p && n < limit; p = endp) {
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long x = strtol(p, &endp, 0);
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if (endp == p)
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break; /* no more digits */
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data[n++] = x;
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}
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}
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fclose(f);
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if (n > limit) {
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fprintf(stderr, "Too much distribution data for %s\n", type);
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return -1;
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}
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return n;
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}
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static int isnumber(const char *arg)
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{
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char *p;
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(void) strtod(arg, &p);
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return (p != arg);
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}
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#define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isnumber(argv[1]))
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/* Adjust for the fact that psched_ticks aren't always usecs
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(based on kernel PSCHED_CLOCK configuration */
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static int get_ticks(__u32 *ticks, const char *str)
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{
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unsigned t;
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if(get_usecs(&t, str))
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return -1;
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*ticks = tc_core_usec2tick(t);
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return 0;
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}
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static char *sprint_ticks(__u32 ticks, char *buf)
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{
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return sprint_usecs(tc_core_tick2usec(ticks), buf);
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}
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static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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struct tc_netem_qopt opt;
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unsigned latency = 0;
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int ok = 0;
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#define REQ_DIST_SIZE (TCA_BUF_MAX/sizeof(__s16))
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struct {
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struct tc_netem_qopt opt;
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__s16 dbuf[REQ_DIST_SIZE];
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} req;
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int size = sizeof(struct tc_netem_qopt);
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memset(&opt, 0, sizeof(opt));
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opt.limit = 1000;
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memset(&req.opt, 0, sizeof(req.opt));
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req.opt.limit = 1000;
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while (argc > 0) {
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if (matches(*argv, "limit") == 0) {
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NEXT_ARG();
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if (get_size(&opt.limit, *argv)) {
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if (get_size(&req.opt.limit, *argv)) {
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explain1("limit");
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return -1;
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}
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ok++;
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} else if (matches(*argv, "latency") == 0) {
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} else if (matches(*argv, "latency") == 0 ||
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matches(*argv, "delay") == 0) {
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NEXT_ARG();
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if (get_usecs(&latency, *argv)) {
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if (get_ticks(&req.opt.latency, *argv)) {
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explain1("latency");
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return -1;
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}
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ok++;
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} else if (matches(*argv, "loss") == 0) {
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if (NEXT_IS_NUMBER()) {
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NEXT_ARG();
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if (get_ticks(&req.opt.jitter, *argv)) {
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explain1("latency");
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return -1;
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}
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if (NEXT_IS_NUMBER()) {
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NEXT_ARG();
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if (get_percent(&req.opt.delay_corr,
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*argv)) {
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explain1("latency");
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return -1;
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}
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}
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}
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} else if (matches(*argv, "loss") == 0 ||
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matches(*argv, "drop") == 0) {
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NEXT_ARG();
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if (get_percent(&opt.loss, *argv)) {
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if (get_percent(&req.opt.loss, *argv)) {
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explain1("loss");
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return -1;
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}
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ok++;
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if (NEXT_IS_NUMBER()) {
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NEXT_ARG();
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if (get_percent(&req.opt.loss_corr, *argv)) {
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explain1("loss");
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return -1;
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}
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}
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} else if (matches(*argv, "gap") == 0) {
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NEXT_ARG();
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if (get_u32(&opt.gap, *argv, 0)) {
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if (get_u32(&req.opt.gap, *argv, 0)) {
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explain1("gap");
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return -1;
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}
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ok++;
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} else if (matches(*argv, "duplicate") == 0) {
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NEXT_ARG();
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if (get_percent(&opt.duplicate, *argv)) {
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if (get_percent(&req.opt.duplicate, *argv)) {
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explain1("duplicate");
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return -1;
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}
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ok++;
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} else if (matches(*argv, "jitter") == 0) {
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if (NEXT_IS_NUMBER()) {
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NEXT_ARG();
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if (get_percent(&req.opt.dup_corr, *argv)) {
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explain1("duplicate");
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return -1;
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}
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}
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} else if (matches(*argv, "distribution") == 0) {
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int count;
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NEXT_ARG();
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if (get_usecs(&opt.jitter, *argv)) {
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explain1("jitter");
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count = get_distribution(*argv, req.opt.delay_dist,
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REQ_DIST_SIZE);
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if (count < 0) {
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explain1("distribution");
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return -1;
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}
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ok++;
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size = sizeof(struct tc_netem_qopt)
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+ count * sizeof(req.opt.delay_dist[0]);
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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@ -102,9 +206,12 @@ static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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argc--; argv++;
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}
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opt.latency = tc_core_usec2tick(latency);
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if (addattr_l(n, TCA_BUF_MAX, TCA_OPTIONS, &req, size)) {
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fprintf(stderr, "netem: options encoding problem\n");
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return -1;
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}
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return ok ? addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) : 0;
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return 0;
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}
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static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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@ -115,25 +222,42 @@ static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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if (opt == NULL)
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return 0;
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if (RTA_PAYLOAD(opt) < sizeof(*qopt))
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if (RTA_PAYLOAD(opt) < sizeof(*qopt)) {
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fprintf(stderr, "netem response too short\n");
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return -1;
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}
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qopt = RTA_DATA(opt);
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fprintf(f, "limit %d", qopt->limit);
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if (qopt->latency)
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fprintf(f, " latency %s",
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sprint_usecs(tc_core_tick2usec(qopt->latency), b1));
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if (qopt->jitter)
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fprintf(f, " jitter %s", sprint_usecs(qopt->jitter, b1));
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if (qopt->loss)
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if (qopt->latency) {
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fprintf(f, " delay %s", sprint_ticks(qopt->latency, b1));
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if (qopt->jitter) {
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fprintf(f, " %s", sprint_ticks(qopt->jitter, b1));
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if (qopt->delay_corr)
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fprintf(f, " %s", sprint_percent(qopt->delay_corr, b1));
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}
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}
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if (qopt->loss) {
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fprintf(f, " loss %s",
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sprint_percent(qopt->loss, b1));
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if (qopt->loss_corr)
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fprintf(f, " %s", sprint_percent(qopt->loss_corr, b1));
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}
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if (qopt->duplicate) {
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fprintf(f, " duplicate %s",
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sprint_percent(qopt->duplicate, b1));
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if (qopt->dup_corr)
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fprintf(f, " %s", sprint_percent(qopt->dup_corr, b1));
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}
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if (qopt->gap)
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fprintf(f, " gap %lu", (unsigned long)qopt->gap);
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return 0;
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}
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@ -148,3 +272,4 @@ struct qdisc_util netem_util = {
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.print_qopt = netem_print_opt,
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.print_xstats = netem_print_xstats,
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};
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