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sd-dhcpv4: introduce The Manufacturer Usage Description (MUD)

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This commit is contained in:
Susant Sahani 2020-03-30 16:42:48 +02:00
parent 1f4faf21e8
commit d11d4a6459
2 changed files with 38 additions and 0 deletions
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34
src/libsystemd-network/sd-dhcp-client.c
View File

@ -27,6 +27,7 @@
#include "random-util.h"
#include "string-util.h"
#include "strv.h"
#include "web-util.h"
#define MAX_CLIENT_ID_LEN (sizeof(uint32_t) + MAX_DUID_LEN) /* Arbitrary limit */
#define MAX_MAC_ADDR_LEN CONST_MAX(INFINIBAND_ALEN, ETH_ALEN)
@ -83,6 +84,7 @@ struct sd_dhcp_client {
size_t client_id_len;
char *hostname;
char *vendor_class_identifier;
char *mudurl;
char **user_class;
uint32_t mtu;
uint32_t xid;
@ -493,6 +495,18 @@ int sd_dhcp_client_set_vendor_class_identifier(
return free_and_strdup(&client->vendor_class_identifier, vci);
}
int sd_dhcp_client_set_mud_url(
sd_dhcp_client *client,
const char *mudurl) {
assert_return(client, -EINVAL);
assert_return(mudurl, -EINVAL);
assert_return(strlen(mudurl) <= 255, -EINVAL);
assert_return(http_url_is_valid(mudurl), -EINVAL);
return free_and_strdup(&client->mudurl, mudurl);
}
int sd_dhcp_client_set_user_class(
sd_dhcp_client *client,
const char* const* user_class) {
@ -895,6 +909,15 @@ static int client_send_discover(sd_dhcp_client *client) {
return r;
}
if (client->mudurl) {
r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
SD_DHCP_OPTION_MUD_URL,
strlen(client->mudurl),
client->mudurl);
if (r < 0)
return r;
}
if (client->user_class) {
r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
SD_DHCP_OPTION_USER_CLASS,
@ -1032,6 +1055,16 @@ static int client_send_request(sd_dhcp_client *client) {
return r;
}
if (client->mudurl) {
r = dhcp_option_append(&request->dhcp, optlen, &optoffset, 0,
SD_DHCP_OPTION_MUD_URL,
strlen(client->mudurl),
client->mudurl);
if (r < 0)
return r;
}
r = dhcp_option_append(&request->dhcp, optlen, &optoffset, 0,
SD_DHCP_OPTION_END, 0, NULL);
if (r < 0)
@ -2101,6 +2134,7 @@ static sd_dhcp_client *dhcp_client_free(sd_dhcp_client *client) {
free(client->req_opts);
free(client->hostname);
free(client->vendor_class_identifier);
free(client->mudurl);
client->user_class = strv_free(client->user_class);
ordered_hashmap_free(client->extra_options);
ordered_hashmap_free(client->vendor_options);

4
src/systemd/sd-dhcp-client.h
View File

@ -92,6 +92,7 @@ enum {
SD_DHCP_OPTION_DOMAIN_SEARCH_LIST = 119,
SD_DHCP_OPTION_SIP_SERVER = 120,
SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE = 121,
SD_DHCP_OPTION_MUD_URL = 161,
SD_DHCP_OPTION_PRIVATE_BASE = 224,
/* Windows 10 option to send when Anonymize=true */
SD_DHCP_OPTION_PRIVATE_CLASSLESS_STATIC_ROUTE = 249,
@ -171,6 +172,9 @@ int sd_dhcp_client_set_hostname(
int sd_dhcp_client_set_vendor_class_identifier(
sd_dhcp_client *client,
const char *vci);
int sd_dhcp_client_set_mud_url(
sd_dhcp_client *client,
const char *mudurl);
int sd_dhcp_client_set_user_class(
sd_dhcp_client *client,
const char* const *user_class);