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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "alloc-util.h"
#include "netlink-util.h"
#include "networkd-route.h"
#include "networkd-route-metric.h"
#include "parse-util.h"
#include "string-util.h"
void route_metric_done(RouteMetric *metric) {
assert(metric);
free(metric->metrics);
free(metric->metrics_set);
free(metric->tcp_congestion_control_algo);
}
int route_metric_copy(const RouteMetric *src, RouteMetric *dest) {
assert(src);
assert(dest);
dest->n_metrics = src->n_metrics;
if (src->n_metrics > 0) {
assert(src->n_metrics != 1);
dest->metrics = newdup(uint32_t, src->metrics, src->n_metrics);
if (!dest->metrics)
return -ENOMEM;
} else
dest->metrics = NULL;
dest->n_metrics_set = src->n_metrics_set;
if (src->n_metrics_set > 0) {
assert(src->n_metrics_set != 1);
dest->metrics_set = newdup(bool, src->metrics_set, src->n_metrics_set);
if (!dest->metrics_set)
return -ENOMEM;
} else
dest->metrics_set = NULL;
return strdup_or_null(src->tcp_congestion_control_algo, &dest->tcp_congestion_control_algo);
}
void route_metric_hash_func(const RouteMetric *metric, struct siphash *state) {
assert(metric);
siphash24_compress_typesafe(metric->n_metrics, state);
siphash24_compress_safe(metric->metrics, sizeof(uint32_t) * metric->n_metrics, state);
siphash24_compress_string(metric->tcp_congestion_control_algo, state);
}
int route_metric_compare_func(const RouteMetric *a, const RouteMetric *b) {
int r;
assert(a);
assert(b);
r = memcmp_nn(a->metrics, a->n_metrics * sizeof(uint32_t), b->metrics, b->n_metrics * sizeof(uint32_t));
if (r != 0)
return r;
return strcmp_ptr(a->tcp_congestion_control_algo, b->tcp_congestion_control_algo);
}
int route_metric_set_full(RouteMetric *metric, uint16_t attr, uint32_t value, bool force) {
assert(metric);
if (force) {
if (!GREEDY_REALLOC0(metric->metrics_set, attr + 1))
return -ENOMEM;
metric->metrics_set[attr] = true;
metric->n_metrics_set = MAX(metric->n_metrics_set, (size_t) (attr + 1));
} else {
/* Do not override the values specified in conf parsers. */
if (metric->n_metrics_set > attr && metric->metrics_set[attr])
return 0;
}
if (value != 0) {
if (!GREEDY_REALLOC0(metric->metrics, attr + 1))
return -ENOMEM;
metric->metrics[attr] = value;
metric->n_metrics = MAX(metric->n_metrics, (size_t) (attr + 1));
return 0;
}
if (metric->n_metrics <= attr)
return 0;
metric->metrics[attr] = 0;
for (size_t i = metric->n_metrics; i > 0; i--)
if (metric->metrics[i-1] != 0) {
metric->n_metrics = i;
return 0;
}
metric->n_metrics = 0;
return 0;
}
static void route_metric_unset(RouteMetric *metric, uint16_t attr) {
assert(metric);
if (metric->n_metrics_set > attr)
metric->metrics_set[attr] = false;
assert_se(route_metric_set_full(metric, attr, 0, /* force = */ false) >= 0);
}
uint32_t route_metric_get(const RouteMetric *metric, uint16_t attr) {
assert(metric);
if (metric->n_metrics <= attr)
return 0;
return metric->metrics[attr];
}
int route_metric_set_netlink_message(const RouteMetric *metric, sd_netlink_message *m) {
int r;
assert(metric);
assert(m);
if (metric->n_metrics <= 0 && isempty(metric->tcp_congestion_control_algo))
return 0;
r = sd_netlink_message_open_container(m, RTA_METRICS);
if (r < 0)
return r;
for (size_t i = 0; i < metric->n_metrics; i++) {
if (i == RTAX_CC_ALGO)
continue;
if (metric->metrics[i] == 0)
continue;
r = sd_netlink_message_append_u32(m, i, metric->metrics[i]);
if (r < 0)
return r;
}
if (!isempty(metric->tcp_congestion_control_algo)) {
r = sd_netlink_message_append_string(m, RTAX_CC_ALGO, metric->tcp_congestion_control_algo);
if (r < 0)
return r;
}
r = sd_netlink_message_close_container(m);
if (r < 0)
return r;
return 0;
}
int route_metric_read_netlink_message(RouteMetric *metric, sd_netlink_message *m) {
_cleanup_free_ void *data = NULL;
size_t len;
int r;
assert(metric);
assert(m);
r = sd_netlink_message_read_data(m, RTA_METRICS, &len, &data);
if (r == -ENODATA)
return 0;
if (r < 0)
return log_warning_errno(r, "rtnl: Could not read RTA_METRICS attribute, ignoring: %m");
for (struct rtattr *rta = data; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
size_t rta_type = RTA_TYPE(rta);
if (rta_type == RTAX_CC_ALGO) {
char *p = memdup_suffix0(RTA_DATA(rta), RTA_PAYLOAD(rta));
if (!p)
return log_oom();
free_and_replace(metric->tcp_congestion_control_algo, p);
} else {
if (RTA_PAYLOAD(rta) != sizeof(uint32_t))
continue;
r = route_metric_set(metric, rta_type, *(uint32_t*) RTA_DATA(rta));
if (r < 0)
return log_oom();
}
}
return 0;
}
static int config_parse_route_metric_advmss_impl(
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) {
uint32_t *val = ASSERT_PTR(data);
uint64_t u;
int r;
assert(rvalue);
r = parse_size(rvalue, 1024, &u);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Could not parse %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
if (u == 0 || u > UINT32_MAX) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
*val = (uint32_t) u;
return 1;
}
static int config_parse_route_metric_hop_limit_impl(
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) {
uint32_t k, *val = ASSERT_PTR(data);
int r;
assert(rvalue);
r = safe_atou32(rvalue, &k);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Could not parse %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
if (k == 0 || k > 255) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
*val = k;
return 1;
}
int config_parse_tcp_window(
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) {
uint32_t k, *val = ASSERT_PTR(data);
int r;
assert(rvalue);
r = safe_atou32(rvalue, &k);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Could not parse %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
if (k == 0 || k >= 1024) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
*val = k;
return 1;
}
static int config_parse_route_metric_tcp_rto_impl(
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) {
uint32_t *val = ASSERT_PTR(data);
usec_t usec;
int r;
assert(rvalue);
r = parse_sec(rvalue, &usec);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
if (!timestamp_is_set(usec) ||
DIV_ROUND_UP(usec, USEC_PER_MSEC) > UINT32_MAX) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
*val = (uint32_t) DIV_ROUND_UP(usec, USEC_PER_MSEC);
return 1;
}
static int config_parse_route_metric_boolean_impl(
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) {
uint32_t *val = ASSERT_PTR(data);
int r;
assert(rvalue);
r = parse_boolean(rvalue);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Could not parse %s=, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
*val = r;
return 1;
}
#define DEFINE_CONFIG_PARSE_ROUTE_METRIC(name, parser) \
int config_parse_route_metric_##name( \
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) { \
\
Network *network = ASSERT_PTR(userdata); \
_cleanup_(route_unref_or_set_invalidp) Route *route = NULL; \
uint16_t attr_type = ltype; \
int r; \
\
assert(filename); \
assert(section); \
assert(lvalue); \
assert(rvalue); \
\
r = route_new_static(network, filename, section_line, &route); \
if (r == -ENOMEM) \
return log_oom(); \
if (r < 0) { \
log_syntax(unit, LOG_WARNING, filename, line, r, \
"Failed to allocate route, ignoring assignment: %m"); \
return 0; \
} \
\
if (isempty(rvalue)) { \
route_metric_unset(&route->metric, attr_type); \
TAKE_PTR(route); \
return 0; \
} \
\
uint32_t k; \
r = parser(unit, filename, line, section, section_line, \
lvalue, /* ltype = */ 0, rvalue, \
&k, userdata); \
if (r <= 0) \
return r; \
\
if (route_metric_set_full( \
&route->metric, \
attr_type, \
k, \
/* force = */ true) < 0) \
return log_oom(); \
\
TAKE_PTR(route); \
return 0; \
}
DEFINE_CONFIG_PARSE_ROUTE_METRIC(mtu, config_parse_mtu);
DEFINE_CONFIG_PARSE_ROUTE_METRIC(advmss, config_parse_route_metric_advmss_impl);
DEFINE_CONFIG_PARSE_ROUTE_METRIC(hop_limit, config_parse_route_metric_hop_limit_impl);
DEFINE_CONFIG_PARSE_ROUTE_METRIC(tcp_window, config_parse_tcp_window);
DEFINE_CONFIG_PARSE_ROUTE_METRIC(tcp_rto, config_parse_route_metric_tcp_rto_impl);
DEFINE_CONFIG_PARSE_ROUTE_METRIC(boolean, config_parse_route_metric_boolean_impl);
int config_parse_route_metric_tcp_congestion(
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) {
Network *network = ASSERT_PTR(userdata);
_cleanup_(route_unref_or_set_invalidp) Route *route = NULL;
int r;
assert(filename);
assert(rvalue);
r = route_new_static(network, filename, section_line, &route);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate route, ignoring assignment: %m");
return 0;
}
r = config_parse_string(unit, filename, line, section, section_line, lvalue, 0,
rvalue, &route->metric.tcp_congestion_control_algo, userdata);
if (r <= 0)
return r;
TAKE_PTR(route);
return 0;
}
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