#include <math.h>
#include <ctype.h>
#include <unistd.h>
-#include <syslog.h>
#include <fcntl.h>
+#include <stdint.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
static void explain(void)
{
fprintf(stderr,
-"Usage: ... netem [ limit PACKETS ] \n" \
+"Usage: ... netem [ limit PACKETS ]\n" \
" [ delay TIME [ JITTER [CORRELATION]]]\n" \
" [ distribution {uniform|normal|pareto|paretonormal} ]\n" \
-" [ corrupt PERCENT [CORRELATION]] \n" \
+" [ corrupt PERCENT [CORRELATION]]\n" \
" [ duplicate PERCENT [CORRELATION]]\n" \
" [ loss random PERCENT [CORRELATION]]\n" \
" [ loss state P13 [P31 [P32 [P23 P14]]]\n" \
" [ loss gemodel PERCENT [R [1-H [1-K]]]\n" \
-" [ reorder PERCENT [CORRELATION] [ gap DISTANCE ]]\n");
+" [ ecn ]\n" \
+" [ reorder PRECENT [CORRELATION] [ gap DISTANCE ]]\n" \
+" [ rate RATE [PACKETOVERHEAD] [CELLSIZE] [CELLOVERHEAD]]\n" \
+" [ slot MIN_DELAY [MAX_DELAY] [packets MAX_PACKETS]" \
+" [bytes MAX_BYTES]]\n" \
+" [ slot distribution" \
+" {uniform|normal|pareto|paretonormal|custom} DELAY JITTER" \
+" [packets MAX_PACKETS] [bytes MAX_BYTES]]\n");
}
static void explain1(const char *arg)
*/
#define MAX_DIST (16*1024)
-static const double max_percent_value = 0xffffffff;
-
/* scaled value used to percent of maximum. */
static void set_percent(__u32 *percent, double per)
{
- *percent = (unsigned) rint(per * max_percent_value);
-}
-
-
-/* Parse either a fraction '.3' or percent '30%
- * return: 0 = ok, -1 = error, 1 = out of range
- */
-static int parse_percent(double *val, const char *str)
-{
- char *p;
-
- *val = strtod(str, &p) / 100.;
- if (*p && strcmp(p, "%") )
- return -1;
-
- return 0;
+ *percent = rint(per * UINT32_MAX);
}
static int get_percent(__u32 *percent, const char *str)
return 0;
}
-void print_percent(char *buf, int len, __u32 per)
+static void print_percent(char *buf, int len, __u32 per)
{
- snprintf(buf, len, "%g%%", 100. * (double) per / max_percent_value);
+ snprintf(buf, len, "%g%%", (100. * per) / UINT32_MAX);
}
-char * sprint_percent(__u32 per, char *buf)
+static char *sprint_percent(__u32 per, char *buf)
{
print_percent(buf, SPRINT_BSIZE-1, per);
return buf;
n = 0;
while (getline(&line, &len, f) != -1) {
char *p, *endp;
+
if (*line == '\n' || *line == '#')
continue;
}
#define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isdigit(argv[1][0]))
+#define NEXT_IS_SIGNED_NUMBER() \
+ (NEXT_ARG_OK() && (isdigit(argv[1][0]) || argv[1][0] == '-'))
/* Adjust for the fact that psched_ticks aren't always usecs
(based on kernel PSCHED_CLOCK configuration */
static int get_ticks(__u32 *ticks, const char *str)
{
- unsigned t;
+ unsigned int t;
- if(get_time(&t, str))
+ if (get_time(&t, str))
return -1;
if (tc_core_time2big(t)) {
}
static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
- struct nlmsghdr *n)
+ struct nlmsghdr *n, const char *dev)
{
int dist_size = 0;
+ int slot_dist_size = 0;
struct rtattr *tail;
struct tc_netem_qopt opt = { .limit = 1000 };
- struct tc_netem_corr cor;
- struct tc_netem_reorder reorder;
- struct tc_netem_corrupt corrupt;
+ struct tc_netem_corr cor = {};
+ struct tc_netem_reorder reorder = {};
+ struct tc_netem_corrupt corrupt = {};
struct tc_netem_gimodel gimodel;
struct tc_netem_gemodel gemodel;
+ struct tc_netem_rate rate = {};
+ struct tc_netem_slot slot = {};
__s16 *dist_data = NULL;
+ __s16 *slot_dist_data = NULL;
__u16 loss_type = NETEM_LOSS_UNSPEC;
- int present[__TCA_NETEM_MAX];
-
- memset(&cor, 0, sizeof(cor));
- memset(&reorder, 0, sizeof(reorder));
- memset(&corrupt, 0, sizeof(corrupt));
- memset(present, 0, sizeof(present));
+ int present[__TCA_NETEM_MAX] = {};
+ __u64 rate64 = 0;
- for( ; argc > 0; --argc, ++argv) {
+ for ( ; argc > 0; --argc, ++argv) {
if (matches(*argv, "limit") == 0) {
NEXT_ARG();
if (get_size(&opt.limit, *argv)) {
if (!strcmp(*argv, "random")) {
NEXT_ARG();
- random_loss_model:
+ random_loss_model:
if (get_percent(&opt.loss, *argv)) {
explain1("loss percent");
return -1;
set_percent(&gimodel.p31, 1. - p13);
set_percent(&gimodel.p32, 0);
set_percent(&gimodel.p23, 1.);
+ set_percent(&gimodel.p14, 0);
loss_type = NETEM_LOSS_GI;
if (!NEXT_IS_NUMBER())
explain1("loss p23");
return -1;
}
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gimodel.p14, *argv)) {
+ explain1("loss p14");
+ return -1;
+ }
} else if (!strcmp(*argv, "gemodel")) {
NEXT_ARG();
/* set defaults */
set_percent(&gemodel.r, 1.);
set_percent(&gemodel.h, 0);
- set_percent(&gemodel.k1, 1.);
+ set_percent(&gemodel.k1, 0);
loss_type = NETEM_LOSS_GE;
if (!NEXT_IS_NUMBER())
explain1("loss gemodel h");
return -1;
}
+ /* netem option is "1-h" but kernel
+ * expects "h".
+ */
+ gemodel.h = UINT32_MAX - gemodel.h;
if (!NEXT_IS_NUMBER())
continue;
*argv);
return -1;
}
+ } else if (matches(*argv, "ecn") == 0) {
+ present[TCA_NETEM_ECN] = 1;
} else if (matches(*argv, "reorder") == 0) {
NEXT_ARG();
present[TCA_NETEM_REORDER] = 1;
free(dist_data);
return -1;
}
+ } else if (matches(*argv, "rate") == 0) {
+ ++present[TCA_NETEM_RATE];
+ NEXT_ARG();
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&rate64, *argv, dev)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (get_rate64(&rate64, *argv)) {
+ explain1("rate");
+ return -1;
+ }
+ if (NEXT_IS_SIGNED_NUMBER()) {
+ NEXT_ARG();
+ if (get_s32(&rate.packet_overhead, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_u32(&rate.cell_size, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ if (NEXT_IS_SIGNED_NUMBER()) {
+ NEXT_ARG();
+ if (get_s32(&rate.cell_overhead, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ } else if (matches(*argv, "slot") == 0) {
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ present[TCA_NETEM_SLOT] = 1;
+ if (get_time64(&slot.min_delay, *argv)) {
+ explain1("slot min_delay");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_time64(&slot.max_delay, *argv) ||
+ slot.max_delay < slot.min_delay) {
+ explain1("slot max_delay");
+ return -1;
+ }
+ } else {
+ slot.max_delay = slot.min_delay;
+ }
+ } else {
+ NEXT_ARG();
+ if (strcmp(*argv, "distribution") == 0) {
+ present[TCA_NETEM_SLOT] = 1;
+ NEXT_ARG();
+ slot_dist_data = calloc(sizeof(slot_dist_data[0]), MAX_DIST);
+ if (!slot_dist_data)
+ return -1;
+ slot_dist_size = get_distribution(*argv, slot_dist_data, MAX_DIST);
+ if (slot_dist_size <= 0) {
+ free(slot_dist_data);
+ return -1;
+ }
+ NEXT_ARG();
+ if (get_time64(&slot.dist_delay, *argv)) {
+ explain1("slot delay");
+ return -1;
+ }
+ NEXT_ARG();
+ if (get_time64(&slot.dist_jitter, *argv)) {
+ explain1("slot jitter");
+ return -1;
+ }
+ if (slot.dist_jitter <= 0) {
+ fprintf(stderr, "Non-positive jitter\n");
+ return -1;
+ }
+ } else {
+ fprintf(stderr, "Unknown slot parameter: %s\n",
+ *argv);
+ return -1;
+ }
+ }
+ if (NEXT_ARG_OK() &&
+ matches(*(argv+1), "packets") == 0) {
+ NEXT_ARG();
+ if (!NEXT_ARG_OK() ||
+ get_s32(&slot.max_packets, *(argv+1), 0)) {
+ explain1("slot packets");
+ return -1;
+ }
+ NEXT_ARG();
+ }
+ if (NEXT_ARG_OK() &&
+ matches(*(argv+1), "bytes") == 0) {
+ unsigned int max_bytes;
+ NEXT_ARG();
+ if (!NEXT_ARG_OK() ||
+ get_size(&max_bytes, *(argv+1))) {
+ explain1("slot bytes");
+ return -1;
+ }
+ slot.max_bytes = (int) max_bytes;
+ NEXT_ARG();
+ }
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
if (reorder.probability) {
if (opt.latency == 0) {
fprintf(stderr, "reordering not possible without specifying some delay\n");
+ explain();
+ return -1;
}
if (opt.gap == 0)
opt.gap = 1;
return -1;
}
+ if (present[TCA_NETEM_ECN]) {
+ if (opt.loss <= 0 && loss_type == NETEM_LOSS_UNSPEC) {
+ fprintf(stderr, "ecn requested without loss model\n");
+ explain();
+ return -1;
+ }
+ }
+
if (dist_data && (opt.latency == 0 || opt.jitter == 0)) {
fprintf(stderr, "distribution specified but no latency and jitter values\n");
explain();
if (present[TCA_NETEM_CORR] &&
addattr_l(n, 1024, TCA_NETEM_CORR, &cor, sizeof(cor)) < 0)
- return -1;
+ return -1;
if (present[TCA_NETEM_REORDER] &&
addattr_l(n, 1024, TCA_NETEM_REORDER, &reorder, sizeof(reorder)) < 0)
return -1;
+ if (present[TCA_NETEM_ECN] &&
+ addattr_l(n, 1024, TCA_NETEM_ECN, &present[TCA_NETEM_ECN],
+ sizeof(present[TCA_NETEM_ECN])) < 0)
+ return -1;
+
if (present[TCA_NETEM_CORRUPT] &&
addattr_l(n, 1024, TCA_NETEM_CORRUPT, &corrupt, sizeof(corrupt)) < 0)
return -1;
+ if (present[TCA_NETEM_SLOT] &&
+ addattr_l(n, 1024, TCA_NETEM_SLOT, &slot, sizeof(slot)) < 0)
+ return -1;
+
if (loss_type != NETEM_LOSS_UNSPEC) {
struct rtattr *start;
if (loss_type == NETEM_LOSS_GI) {
if (addattr_l(n, 1024, NETEM_LOSS_GI,
&gimodel, sizeof(gimodel)) < 0)
- return -1;
+ return -1;
} else if (loss_type == NETEM_LOSS_GE) {
if (addattr_l(n, 1024, NETEM_LOSS_GE,
&gemodel, sizeof(gemodel)) < 0)
- return -1;
+ return -1;
} else {
fprintf(stderr, "loss in the weeds!\n");
return -1;
}
-
+
addattr_nest_end(n, start);
}
+ if (present[TCA_NETEM_RATE]) {
+ if (rate64 >= (1ULL << 32)) {
+ if (addattr_l(n, 1024,
+ TCA_NETEM_RATE64, &rate64, sizeof(rate64)) < 0)
+ return -1;
+ rate.rate = ~0U;
+ } else {
+ rate.rate = rate64;
+ }
+ if (addattr_l(n, 1024, TCA_NETEM_RATE, &rate, sizeof(rate)) < 0)
+ return -1;
+ }
+
if (dist_data) {
if (addattr_l(n, MAX_DIST * sizeof(dist_data[0]),
TCA_NETEM_DELAY_DIST,
return -1;
free(dist_data);
}
+
+ if (slot_dist_data) {
+ if (addattr_l(n, MAX_DIST * sizeof(slot_dist_data[0]),
+ TCA_NETEM_SLOT_DIST,
+ slot_dist_data, slot_dist_size * sizeof(slot_dist_data[0])) < 0)
+ return -1;
+ free(slot_dist_data);
+ }
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
const struct tc_netem_corrupt *corrupt = NULL;
const struct tc_netem_gimodel *gimodel = NULL;
const struct tc_netem_gemodel *gemodel = NULL;
+ int *ecn = NULL;
struct tc_netem_qopt qopt;
- int len = RTA_PAYLOAD(opt) - sizeof(qopt);
+ const struct tc_netem_rate *rate = NULL;
+ const struct tc_netem_slot *slot = NULL;
+ int len;
+ __u64 rate64 = 0;
+
SPRINT_BUF(b1);
if (opt == NULL)
return 0;
+ len = RTA_PAYLOAD(opt) - sizeof(qopt);
if (len < 0) {
fprintf(stderr, "options size error\n");
return -1;
if (len > 0) {
struct rtattr *tb[TCA_NETEM_MAX+1];
+
parse_rtattr(tb, TCA_NETEM_MAX, RTA_DATA(opt) + sizeof(qopt),
len);
parse_rtattr_nested(lb, NETEM_LOSS_MAX, tb[TCA_NETEM_LOSS]);
if (lb[NETEM_LOSS_GI])
- gemodel = RTA_DATA(lb[NETEM_LOSS_GI]);
+ gimodel = RTA_DATA(lb[NETEM_LOSS_GI]);
if (lb[NETEM_LOSS_GE])
gemodel = RTA_DATA(lb[NETEM_LOSS_GE]);
- }
+ }
+ if (tb[TCA_NETEM_RATE]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_RATE]) < sizeof(*rate))
+ return -1;
+ rate = RTA_DATA(tb[TCA_NETEM_RATE]);
+ }
+ if (tb[TCA_NETEM_ECN]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_ECN]) < sizeof(*ecn))
+ return -1;
+ ecn = RTA_DATA(tb[TCA_NETEM_ECN]);
+ }
+ if (tb[TCA_NETEM_RATE64]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_RATE64]) < sizeof(rate64))
+ return -1;
+ rate64 = rta_getattr_u64(tb[TCA_NETEM_RATE64]);
+ }
+ if (tb[TCA_NETEM_SLOT]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_SLOT]) < sizeof(*slot))
+ return -1;
+ slot = RTA_DATA(tb[TCA_NETEM_SLOT]);
+ }
}
fprintf(f, "limit %d", qopt.limit);
}
if (gemodel) {
- fprintf(f, "loss gemodel p %s",
+ fprintf(f, " loss gemodel p %s",
sprint_percent(gemodel->p, b1));
fprintf(f, " r %s", sprint_percent(gemodel->r, b1));
- fprintf(f, " 1-h %s", sprint_percent(gemodel->h, b1));
+ fprintf(f, " 1-h %s", sprint_percent(UINT32_MAX -
+ gemodel->h, b1));
fprintf(f, " 1-k %s", sprint_percent(gemodel->k1, b1));
}
sprint_percent(corrupt->correlation, b1));
}
+ if (rate && rate->rate) {
+ if (rate64)
+ fprintf(f, " rate %s", sprint_rate(rate64, b1));
+ else
+ fprintf(f, " rate %s", sprint_rate(rate->rate, b1));
+ if (rate->packet_overhead)
+ fprintf(f, " packetoverhead %d", rate->packet_overhead);
+ if (rate->cell_size)
+ fprintf(f, " cellsize %u", rate->cell_size);
+ if (rate->cell_overhead)
+ fprintf(f, " celloverhead %d", rate->cell_overhead);
+ }
+
+ if (slot) {
+ if (slot->dist_jitter > 0) {
+ fprintf(f, " slot distribution %s", sprint_time64(slot->dist_delay, b1));
+ fprintf(f, " %s", sprint_time64(slot->dist_jitter, b1));
+ } else {
+ fprintf(f, " slot %s", sprint_time64(slot->min_delay, b1));
+ fprintf(f, " %s", sprint_time64(slot->max_delay, b1));
+ }
+ if (slot->max_packets)
+ fprintf(f, " packets %d", slot->max_packets);
+ if (slot->max_bytes)
+ fprintf(f, " bytes %d", slot->max_bytes);
+ }
+
+ if (ecn)
+ fprintf(f, " ecn ");
+
if (qopt.gap)
fprintf(f, " gap %lu", (unsigned long)qopt.gap);
+
return 0;
}
struct qdisc_util netem_qdisc_util = {
- .id = "netem",
+ .id = "netem",
.parse_qopt = netem_parse_opt,
.print_qopt = netem_print_opt,
};
-
projects / mirror_iproute2.git / blobdiff