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Author SHA1 Message Date
Zbigniew Jędrzejewski-Szmek c8966bffdd
Merge pull request #13663 from ssahani/dhcp-send-option-data
network: DHCPv4 client- add support to send arbitary option and data
2019-10-16 11:31:22 +02:00
RoadrunnerWMC f0bad11fac Add Acer Switch SW312-31 to sensor hwdb
See issue #13732
2019-10-16 11:30:25 +02:00
Yu Watanabe 7acb7707ff test-network: disable IPv6AcceptRA= to speed up tests 2019-10-15 00:14:09 +09:00
Susant Sahani cb29c15605 network: DHCPv4 client: add support to send arbitary option and data 2019-10-15 00:14:02 +09:00
14 changed files with 206 additions and 2 deletions

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@ -82,6 +82,9 @@ sensor:modalias:acpi:SMO8500:*:dmi:*Acer*:pnOneS1002*
sensor:modalias:acpi:KIOX0009*:dmi:*:svnAcer:pnOneS1003:*
ACCEL_MOUNT_MATRIX=1, 0, 0; 0, -1, 0; 0, 0, 1
sensor:modalias:acpi:BOSC0200*:dmi:*:svnAcer*:pnSwitchSW312-31:*
ACCEL_MOUNT_MATRIX=0, -1, 0; -1, 0, 0; 0, 0, 1
#########################################
# Archos

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@ -1609,6 +1609,15 @@
</listitem>
</varlistentry>
<varlistentry>
<term><varname>SendOptions=</varname></term>
<listitem>
<para>Send a raw option with value via DHCPv4 client. Takes a DHCP option and base64 encoded
data separated with a colon (option:value). The option ranges [1-254]. This option can be
specified multiple times. If an empty string is specified, then all options specified earlier
are cleared. Defaults to unset.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>

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@ -0,0 +1,4 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
extern const struct hash_ops dhcp_option_hash_ops;

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@ -3,6 +3,7 @@
sources = files('''
sd-dhcp-client.c
sd-dhcp-server.c
dhcp-client-internal.h
dhcp-network.c
dhcp-option.c
dhcp-packet.c

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@ -35,6 +35,14 @@
#define RESTART_AFTER_NAK_MIN_USEC (1 * USEC_PER_SEC)
#define RESTART_AFTER_NAK_MAX_USEC (30 * USEC_PER_MINUTE)
struct sd_dhcp_option {
unsigned n_ref;
uint8_t option;
void *data;
size_t length;
};
struct sd_dhcp_client {
unsigned n_ref;
@ -90,6 +98,7 @@ struct sd_dhcp_client {
usec_t start_time;
uint64_t attempt;
uint64_t max_attempts;
OrderedHashmap *options;
usec_t request_sent;
sd_event_source *timeout_t1;
sd_event_source *timeout_t2;
@ -530,6 +539,66 @@ int sd_dhcp_client_set_max_attempts(sd_dhcp_client *client, uint64_t max_attempt
return 0;
}
static sd_dhcp_option* dhcp_option_free(sd_dhcp_option *i) {
if (!i)
return NULL;
free(i->data);
return mfree(i);
}
int sd_dhcp_option_new(uint8_t option, void *data, size_t length, sd_dhcp_option **ret) {
_cleanup_(sd_dhcp_option_unrefp) sd_dhcp_option *p = NULL;
_cleanup_free_ void *q = NULL;
assert(ret);
q = memdup(data, length);
if (!q)
return -ENOMEM;
p = new(sd_dhcp_option, 1);
if (!p)
return -ENOMEM;
*p = (sd_dhcp_option) {
.n_ref = 1,
.option = option,
.length = length,
.data = TAKE_PTR(q),
};
*ret = TAKE_PTR(p);
return 0;
}
DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_option, sd_dhcp_option, dhcp_option_free);
DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
dhcp_option_hash_ops,
void,
trivial_hash_func,
trivial_compare_func,
sd_dhcp_option,
sd_dhcp_option_unref);
int sd_dhcp_client_set_dhcp_option(sd_dhcp_client *client, sd_dhcp_option *v) {
int r;
assert_return(client, -EINVAL);
assert_return(v, -EINVAL);
r = ordered_hashmap_ensure_allocated(&client->options, &dhcp_option_hash_ops);
if (r < 0)
return r;
r = ordered_hashmap_put(client->options, UINT_TO_PTR(v->option), v);
if (r < 0)
return r;
sd_dhcp_option_ref(v);
return 0;
}
int sd_dhcp_client_get_lease(sd_dhcp_client *client, sd_dhcp_lease **ret) {
assert_return(client, -EINVAL);
@ -791,6 +860,8 @@ static int dhcp_client_send_raw(
static int client_send_discover(sd_dhcp_client *client) {
_cleanup_free_ DHCPPacket *discover = NULL;
size_t optoffset, optlen;
sd_dhcp_option *j;
Iterator i;
int r;
assert(client);
@ -852,6 +923,13 @@ static int client_send_discover(sd_dhcp_client *client) {
return r;
}
ORDERED_HASHMAP_FOREACH(j, client->options, i) {
r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
j->option, j->length, j->data);
if (r < 0)
return r;
}
r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
SD_DHCP_OPTION_END, 0, NULL);
if (r < 0)
@ -1991,6 +2069,7 @@ static sd_dhcp_client *dhcp_client_free(sd_dhcp_client *client) {
free(client->hostname);
free(client->vendor_class_identifier);
client->user_class = strv_free(client->user_class);
ordered_hashmap_free(client->options);
return mfree(client);
}

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@ -5,6 +5,8 @@
#include <linux/if_arp.h>
#include "alloc-util.h"
#include "dhcp-client-internal.h"
#include "hexdecoct.h"
#include "hostname-util.h"
#include "parse-util.h"
#include "network-internal.h"
@ -1186,6 +1188,7 @@ int dhcp4_set_client_identifier(Link *link) {
}
int dhcp4_configure(Link *link) {
sd_dhcp_option *send_option;
void *request_options;
Iterator i;
int r;
@ -1292,6 +1295,12 @@ int dhcp4_configure(Link *link) {
return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set request flag for '%u': %m", option);
}
ORDERED_HASHMAP_FOREACH(send_option, link->network->dhcp_send_options, i) {
r = sd_dhcp_client_set_dhcp_option(link->dhcp_client, send_option);
if (r < 0)
return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set send option: %m");
}
r = dhcp4_set_hostname(link);
if (r < 0)
return r;
@ -1557,6 +1566,90 @@ int config_parse_dhcp_request_options(
return 0;
}
int config_parse_dhcp_send_options(
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_(sd_dhcp_option_unrefp) sd_dhcp_option *opt = NULL, *old = NULL;
_cleanup_free_ char *word = NULL;
_cleanup_free_ void *q = NULL;
Network *network = data;
const char *p;
uint8_t u;
size_t sz;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if (isempty(rvalue)) {
network->dhcp_send_options = ordered_hashmap_free(network->dhcp_send_options);
return 0;
}
p = rvalue;
r = extract_first_word(&p, &word, ":", 0);
if (r == -ENOMEM)
return log_oom();
if (r <= 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Invalid DHCP send option, ignoring assignment: %s", rvalue);
return 0;
}
r = safe_atou8(word, &u);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Invalid DHCP send option, ignoring assignment: %s", rvalue);
return 0;
}
if (u < 1 || u >= 255) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid DHCP send option, valid range is 1-254, ignoring assignment: %s", rvalue);
return 0;
}
r = unbase64mem(p, (size_t) -1, &q, &sz);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to decode base64 data, ignoring assignment: %s", p);
return 0;
}
r = sd_dhcp_option_new(u, q, sz, &opt);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to store DHCP send option '%s', ignoring assignment: %m", rvalue);
return 0;
}
r = ordered_hashmap_ensure_allocated(&network->dhcp_send_options, &dhcp_option_hash_ops);
if (r < 0)
return log_oom();
/* Overwrite existing option */
old = ordered_hashmap_remove(network->dhcp_send_options, UINT_TO_PTR(u));
r = ordered_hashmap_put(network->dhcp_send_options, UINT_TO_PTR(u), opt);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to store DHCP send option '%s'", rvalue);
return 0;
}
TAKE_PTR(opt);
return 0;
}
static const char* const dhcp_client_identifier_table[_DHCP_CLIENT_ID_MAX] = {
[DHCP_CLIENT_ID_MAC] = "mac",
[DHCP_CLIENT_ID_DUID] = "duid",

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@ -27,3 +27,4 @@ CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_black_listed_ip_address);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_max_attempts);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_user_class);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_request_options);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_send_options);

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@ -170,6 +170,7 @@ DHCPv4.ListenPort, config_parse_uint16,
DHCPv4.SendRelease, config_parse_bool, 0, offsetof(Network, dhcp_send_release)
DHCPv4.BlackList, config_parse_dhcp_black_listed_ip_address, 0, 0
DHCPv4.IPServiceType, config_parse_ip_service_type, 0, offsetof(Network, ip_service_type)
DHCPv4.SendOptions, config_parse_dhcp_send_options, 0, 0
DHCPv6.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp6_use_dns)
DHCPv6.UseNTP, config_parse_bool, 0, offsetof(Network, dhcp6_use_ntp)
DHCPv6.RapidCommit, config_parse_bool, 0, offsetof(Network, rapid_commit)

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@ -630,6 +630,8 @@ static Network *network_free(Network *network) {
set_free_free(network->dnssec_negative_trust_anchors);
ordered_hashmap_free(network->dhcp_send_options);
return mfree(network);
}

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@ -87,10 +87,11 @@ struct Network {
unsigned dhcp_route_metric;
uint32_t dhcp_route_table;
uint16_t dhcp_client_port;
int dhcp_critical;
int ip_service_type;
bool dhcp_anonymize;
bool dhcp_send_hostname;
bool dhcp_broadcast;
int dhcp_critical;
bool dhcp_use_dns;
bool dhcp_routes_to_dns;
bool dhcp_use_ntp;
@ -105,7 +106,7 @@ struct Network {
DHCPUseDomains dhcp_use_domains;
Set *dhcp_black_listed_ip;
Set *dhcp_request_options;
int ip_service_type;
OrderedHashmap *dhcp_send_options;
/* DHCPv6 Client support*/
bool dhcp6_use_dns;

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@ -99,6 +99,7 @@ enum {
};
typedef struct sd_dhcp_client sd_dhcp_client;
typedef struct sd_dhcp_option sd_dhcp_option;
typedef int (*sd_dhcp_client_callback_t)(sd_dhcp_client *client, int event, void *userdata);
int sd_dhcp_client_set_callback(
@ -178,6 +179,11 @@ int sd_dhcp_client_set_service_type(
sd_dhcp_client *client,
int type);
int sd_dhcp_option_new(uint8_t option, void *data, size_t length, sd_dhcp_option **ret);
sd_dhcp_option* sd_dhcp_option_ref(sd_dhcp_option *i);
sd_dhcp_option* sd_dhcp_option_unref(sd_dhcp_option *i);
int sd_dhcp_client_set_dhcp_option(sd_dhcp_client *client, sd_dhcp_option *v);
int sd_dhcp_client_stop(sd_dhcp_client *client);
int sd_dhcp_client_start(sd_dhcp_client *client);
int sd_dhcp_client_send_release(sd_dhcp_client *client);
@ -198,6 +204,7 @@ int sd_dhcp_client_detach_event(sd_dhcp_client *client);
sd_event *sd_dhcp_client_get_event(sd_dhcp_client *client);
_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_dhcp_client, sd_dhcp_client_unref);
_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_dhcp_option, sd_dhcp_option_unref);
_SD_END_DECLARATIONS;

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@ -94,6 +94,7 @@ RequestOptions=
SendRelease=
MaxAttempts=
IPServiceType=
SendOptions=
[DHCPv6]
UseNTP=
UseDNS=

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@ -2,5 +2,6 @@
Name=veth-peer
[Network]
IPv6AcceptRA=no
Address=2600::1/0
Address=192.168.5.1/24

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@ -2,5 +2,6 @@
Name=veth-peer
[Network]
IPv6AcceptRA=no
Address=192.168.0.1/24
Address=192.168.5.1/24