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/* SPDX-License-Identifier: LGPL-2.1-or-later
* Copyright © 2019 VMware, Inc. */
#include <linux/pkt_sched.h>
#include "alloc-util.h"
#include "conf-parser.h"
#include "netem.h"
#include "netlink-util.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "qdisc.h"
#include "strv.h"
#include "tc-util.h"
static int network_emulator_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
struct tc_netem_qopt opt = {
.limit = 1000,
};
NetworkEmulator *ne;
int r;
assert(link);
assert(qdisc);
assert(req);
ne = NETEM(qdisc);
if (ne->limit > 0)
opt.limit = ne->limit;
if (ne->loss > 0)
opt.loss = ne->loss;
if (ne->duplicate > 0)
opt.duplicate = ne->duplicate;
if (ne->delay != USEC_INFINITY) {
r = tc_time_to_tick(ne->delay, &opt.latency);
if (r < 0)
return log_link_error_errno(link, r, "Failed to calculate latency in TCA_OPTION: %m");
}
if (ne->jitter != USEC_INFINITY) {
r = tc_time_to_tick(ne->jitter, &opt.jitter);
if (r < 0)
return log_link_error_errno(link, r, "Failed to calculate jitter in TCA_OPTION: %m");
}
r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(struct tc_netem_qopt));
if (r < 0)
return log_link_error_errno(link, r, "Could not append TCA_OPTION attribute: %m");
return 0;
}
int config_parse_network_emulator_delay(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
Network *network = data;
NetworkEmulator *ne;
usec_t u;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"More than one kind of queueing discipline, ignoring assignment: %m");
return 0;
}
ne = NETEM(qdisc);
if (isempty(rvalue)) {
if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
ne->delay = USEC_INFINITY;
else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
ne->jitter = USEC_INFINITY;
qdisc = NULL;
return 0;
}
r = parse_sec(rvalue, &u);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse '%s=', ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
if (STR_IN_SET(lvalue, "DelaySec", "NetworkEmulatorDelaySec"))
ne->delay = u;
else if (STR_IN_SET(lvalue, "DelayJitterSec", "NetworkEmulatorDelayJitterSec"))
ne->jitter = u;
qdisc = NULL;
return 0;
}
int config_parse_network_emulator_rate(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
Network *network = data;
NetworkEmulator *ne;
uint32_t rate;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"More than one kind of queueing discipline, ignoring assignment: %m");
return 0;
}
ne = NETEM(qdisc);
if (isempty(rvalue)) {
if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
ne->loss = 0;
else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
ne->duplicate = 0;
qdisc = NULL;
return 0;
}
r = parse_tc_percent(rvalue, &rate);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse '%s=', ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
if (STR_IN_SET(lvalue, "LossRate", "NetworkEmulatorLossRate"))
ne->loss = rate;
else if (STR_IN_SET(lvalue, "DuplicateRate", "NetworkEmulatorDuplicateRate"))
ne->duplicate = rate;
qdisc = NULL;
return 0;
}
int config_parse_network_emulator_packet_limit(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
Network *network = data;
NetworkEmulator *ne;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = qdisc_new_static(QDISC_KIND_NETEM, network, filename, section_line, &qdisc);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"More than one kind of queueing discipline, ignoring assignment: %m");
return 0;
}
ne = NETEM(qdisc);
if (isempty(rvalue)) {
ne->limit = 0;
qdisc = NULL;
return 0;
}
r = safe_atou(rvalue, &ne->limit);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse '%s=', ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
qdisc = NULL;
return 0;
}
const QDiscVTable netem_vtable = {
.object_size = sizeof(NetworkEmulator),
.tca_kind = "netem",
.fill_message = network_emulator_fill_message,
};
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