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-rw-r--r--src/libsystemd-network/dhcp-identifier.c31
-rw-r--r--src/libsystemd-network/dhcp-identifier.h42
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c181
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c58
4 files changed, 196 insertions, 116 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c
index 4f7d4d8bf2..a21efc4d06 100644
--- a/src/libsystemd-network/dhcp-identifier.c
+++ b/src/libsystemd-network/dhcp-identifier.c
@@ -31,6 +31,37 @@
#define SYSTEMD_PEN 43793
#define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09)
+int dhcp_validate_duid_len(uint16_t duid_type, size_t duid_len) {
+ struct duid d;
+
+ assert_cc(sizeof(d.raw) >= MAX_DUID_LEN);
+ if (duid_len > MAX_DUID_LEN)
+ return -EINVAL;
+
+ switch (duid_type) {
+ case DUID_TYPE_LLT:
+ if (duid_len <= sizeof(d.llt))
+ return -EINVAL;
+ break;
+ case DUID_TYPE_EN:
+ if (duid_len != sizeof(d.en))
+ return -EINVAL;
+ break;
+ case DUID_TYPE_LL:
+ if (duid_len <= sizeof(d.ll))
+ return -EINVAL;
+ break;
+ case DUID_TYPE_UUID:
+ if (duid_len != sizeof(d.uuid))
+ return -EINVAL;
+ break;
+ default:
+ /* accept unknown type in order to be forward compatible */
+ break;
+ }
+ return 0;
+}
+
int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) {
sd_id128_t machine_id;
uint64_t hash;
diff --git a/src/libsystemd-network/dhcp-identifier.h b/src/libsystemd-network/dhcp-identifier.h
index e6486b78f8..1cc0f9fb71 100644
--- a/src/libsystemd-network/dhcp-identifier.h
+++ b/src/libsystemd-network/dhcp-identifier.h
@@ -26,7 +26,6 @@
#include "unaligned.h"
typedef enum DUIDType {
- DUID_TYPE_RAW = 0,
DUID_TYPE_LLT = 1,
DUID_TYPE_EN = 2,
DUID_TYPE_LL = 3,
@@ -40,27 +39,28 @@ typedef enum DUIDType {
*/
#define MAX_DUID_LEN 128
+/* https://tools.ietf.org/html/rfc3315#section-9.1 */
struct duid {
be16_t type;
union {
struct {
- /* DHCP6_DUID_LLT */
+ /* DUID_TYPE_LLT */
uint16_t htype;
uint32_t time;
uint8_t haddr[0];
} _packed_ llt;
struct {
- /* DHCP6_DUID_EN */
+ /* DUID_TYPE_EN */
uint32_t pen;
uint8_t id[8];
} _packed_ en;
struct {
- /* DHCP6_DUID_LL */
+ /* DUID_TYPE_LL */
int16_t htype;
uint8_t haddr[0];
} _packed_ ll;
struct {
- /* DHCP6_DUID_UUID */
+ /* DUID_TYPE_UUID */
sd_id128_t uuid;
} _packed_ uuid;
struct {
@@ -69,36 +69,6 @@ struct duid {
};
} _packed_;
+int dhcp_validate_duid_len(uint16_t duid_type, size_t duid_len);
int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len);
int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, void *_id);
-
-static inline int dhcp_validate_duid_len(uint16_t duid_type, size_t duid_len) {
- struct duid d;
-
- assert(duid_len > 0);
-
- switch (duid_type) {
- case DUID_TYPE_LLT:
- if (duid_len <= sizeof(d.llt))
- return -EINVAL;
- break;
- case DUID_TYPE_EN:
- if (duid_len != sizeof(d.en))
- return -EINVAL;
- break;
- case DUID_TYPE_LL:
- if (duid_len <= sizeof(d.ll))
- return -EINVAL;
- break;
- case DUID_TYPE_UUID:
- if (duid_len != sizeof(d.uuid))
- return -EINVAL;
- break;
- default:
- if (duid_len > sizeof(d.raw))
- return -EINVAL;
- /* accept unknown type in order to be forward compatible */
- break;
- }
- return 0;
-}
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 287b6e26fa..3846cf7476 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -115,14 +115,22 @@ static const uint8_t default_req_opts[] = {
SD_DHCP_OPTION_DOMAIN_NAME_SERVER,
};
-static int client_receive_message_raw(sd_event_source *s, int fd,
- uint32_t revents, void *userdata);
-static int client_receive_message_udp(sd_event_source *s, int fd,
- uint32_t revents, void *userdata);
+static int client_receive_message_raw(
+ sd_event_source *s,
+ int fd,
+ uint32_t revents,
+ void *userdata);
+static int client_receive_message_udp(
+ sd_event_source *s,
+ int fd,
+ uint32_t revents,
+ void *userdata);
static void client_stop(sd_dhcp_client *client, int error);
-int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_callback_t cb,
- void *userdata) {
+int sd_dhcp_client_set_callback(
+ sd_dhcp_client *client,
+ sd_dhcp_client_callback_t cb,
+ void *userdata) {
assert_return(client, -EINVAL);
client->cb = cb;
@@ -171,8 +179,9 @@ int sd_dhcp_client_set_request_option(sd_dhcp_client *client, uint8_t option) {
return 0;
}
-int sd_dhcp_client_set_request_address(sd_dhcp_client *client,
- const struct in_addr *last_addr) {
+int sd_dhcp_client_set_request_address(
+ sd_dhcp_client *client,
+ const struct in_addr *last_addr) {
assert_return(client, -EINVAL);
assert_return (IN_SET(client->state, DHCP_STATE_INIT,
DHCP_STATE_STOPPED), -EBUSY);
@@ -196,8 +205,12 @@ int sd_dhcp_client_set_index(sd_dhcp_client *client, int interface_index) {
return 0;
}
-int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
- size_t addr_len, uint16_t arp_type) {
+int sd_dhcp_client_set_mac(
+ sd_dhcp_client *client,
+ const uint8_t *addr,
+ size_t addr_len,
+ uint16_t arp_type) {
+
DHCP_CLIENT_DONT_DESTROY(client);
bool need_restart = false;
@@ -234,8 +247,11 @@ int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
return 0;
}
-int sd_dhcp_client_get_client_id(sd_dhcp_client *client, uint8_t *type,
- const uint8_t **data, size_t *data_len) {
+int sd_dhcp_client_get_client_id(
+ sd_dhcp_client *client,
+ uint8_t *type,
+ const uint8_t **data,
+ size_t *data_len) {
assert_return(client, -EINVAL);
assert_return(type, -EINVAL);
@@ -254,8 +270,12 @@ int sd_dhcp_client_get_client_id(sd_dhcp_client *client, uint8_t *type,
return 0;
}
-int sd_dhcp_client_set_client_id(sd_dhcp_client *client, uint8_t type,
- const uint8_t *data, size_t data_len) {
+int sd_dhcp_client_set_client_id(
+ sd_dhcp_client *client,
+ uint8_t type,
+ const uint8_t *data,
+ size_t data_len) {
+
DHCP_CLIENT_DONT_DESTROY(client);
bool need_restart = false;
@@ -298,13 +318,32 @@ int sd_dhcp_client_set_client_id(sd_dhcp_client *client, uint8_t type,
return 0;
}
-int sd_dhcp_client_set_iaid_duid(sd_dhcp_client *client, uint32_t iaid,
- uint16_t duid_type, uint8_t *duid, size_t duid_len) {
+/**
+ * Sets IAID and DUID. If duid is non-null, the DUID is set to duid_type + duid
+ * without further modification. Otherwise, if duid_type is supported, DUID
+ * is set based on that type. Otherwise, an error is returned.
+ */
+int sd_dhcp_client_set_iaid_duid(
+ sd_dhcp_client *client,
+ uint32_t iaid,
+ uint16_t duid_type,
+ const void *duid,
+ size_t duid_len) {
+
DHCP_CLIENT_DONT_DESTROY(client);
int r;
+ size_t len;
+
assert_return(client, -EINVAL);
- zero(client->client_id);
+ assert_return(duid_len == 0 || duid != NULL, -EINVAL);
+
+ if (duid != NULL) {
+ r = dhcp_validate_duid_len(duid_type, duid_len);
+ if (r < 0)
+ return r;
+ }
+ zero(client->client_id);
client->client_id.type = 255;
/* If IAID is not configured, generate it. */
@@ -317,22 +356,18 @@ int sd_dhcp_client_set_iaid_duid(sd_dhcp_client *client, uint32_t iaid,
} else
client->client_id.ns.iaid = htobe32(iaid);
- /* If DUID is not configured, generate DUID-EN. */
- if (duid_len == 0) {
- r = dhcp_identifier_set_duid_en(&client->client_id.ns.duid,
- &duid_len);
- if (r < 0)
- return r;
- } else {
- r = dhcp_validate_duid_len(client->client_id.type, duid_len);
- if (r < 0)
- return r;
+ if (duid != NULL) {
client->client_id.ns.duid.type = htobe16(duid_type);
memcpy(&client->client_id.ns.duid.raw.data, duid, duid_len);
- duid_len += sizeof(client->client_id.ns.duid.type);
- }
+ len = sizeof(client->client_id.ns.duid.type) + duid_len;
+ } else if (duid_type == DUID_TYPE_EN) {
+ r = dhcp_identifier_set_duid_en(&client->client_id.ns.duid, &len);
+ if (r < 0)
+ return r;
+ } else
+ return -EOPNOTSUPP;
- client->client_id_len = sizeof(client->client_id.type) + duid_len +
+ client->client_id_len = sizeof(client->client_id.type) + len +
sizeof(client->client_id.ns.iaid);
if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
@@ -344,8 +379,10 @@ int sd_dhcp_client_set_iaid_duid(sd_dhcp_client *client, uint32_t iaid,
return 0;
}
-int sd_dhcp_client_set_hostname(sd_dhcp_client *client,
- const char *hostname) {
+int sd_dhcp_client_set_hostname(
+ sd_dhcp_client *client,
+ const char *hostname) {
+
char *new_hostname = NULL;
assert_return(client, -EINVAL);
@@ -368,8 +405,10 @@ int sd_dhcp_client_set_hostname(sd_dhcp_client *client,
return 0;
}
-int sd_dhcp_client_set_vendor_class_identifier(sd_dhcp_client *client,
- const char *vci) {
+int sd_dhcp_client_set_vendor_class_identifier(
+ sd_dhcp_client *client,
+ const char *vci) {
+
char *new_vci = NULL;
assert_return(client, -EINVAL);
@@ -452,8 +491,13 @@ static void client_stop(sd_dhcp_client *client, int error) {
client_initialize(client);
}
-static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
- uint8_t type, size_t *_optlen, size_t *_optoffset) {
+static int client_message_init(
+ sd_dhcp_client *client,
+ DHCPPacket **ret,
+ uint8_t type,
+ size_t *_optlen,
+ size_t *_optoffset) {
+
_cleanup_free_ DHCPPacket *packet = NULL;
size_t optlen, optoffset, size;
be16_t max_size;
@@ -594,8 +638,12 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
return 0;
}
-static int client_append_fqdn_option(DHCPMessage *message, size_t optlen, size_t *optoffset,
- const char *fqdn) {
+static int client_append_fqdn_option(
+ DHCPMessage *message,
+ size_t optlen,
+ size_t *optoffset,
+ const char *fqdn) {
+
uint8_t buffer[3 + DHCP_MAX_FQDN_LENGTH];
int r;
@@ -612,8 +660,11 @@ static int client_append_fqdn_option(DHCPMessage *message, size_t optlen, size_t
return r;
}
-static int dhcp_client_send_raw(sd_dhcp_client *client, DHCPPacket *packet,
- size_t len) {
+static int dhcp_client_send_raw(
+ sd_dhcp_client *client,
+ DHCPPacket *packet,
+ size_t len) {
+
dhcp_packet_append_ip_headers(packet, INADDR_ANY, DHCP_PORT_CLIENT,
INADDR_BROADCAST, DHCP_PORT_SERVER, len);
@@ -820,8 +871,11 @@ static int client_send_request(sd_dhcp_client *client) {
static int client_start(sd_dhcp_client *client);
-static int client_timeout_resend(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_resend(
+ sd_event_source *s,
+ uint64_t usec,
+ void *userdata) {
+
sd_dhcp_client *client = userdata;
DHCP_CLIENT_DONT_DESTROY(client);
usec_t next_timeout = 0;
@@ -965,8 +1019,10 @@ error:
return 0;
}
-static int client_initialize_io_events(sd_dhcp_client *client,
- sd_event_io_handler_t io_callback) {
+static int client_initialize_io_events(
+ sd_dhcp_client *client,
+ sd_event_io_handler_t io_callback) {
+
int r;
assert(client);
@@ -1033,8 +1089,7 @@ error:
}
-static int client_initialize_events(sd_dhcp_client *client,
- sd_event_io_handler_t io_callback) {
+static int client_initialize_events(sd_dhcp_client *client, sd_event_io_handler_t io_callback) {
client_initialize_io_events(client, io_callback);
client_initialize_time_events(client);
@@ -1074,8 +1129,7 @@ static int client_start(sd_dhcp_client *client) {
return client_start_delayed(client);
}
-static int client_timeout_expire(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_expire(sd_event_source *s, uint64_t usec, void *userdata) {
sd_dhcp_client *client = userdata;
DHCP_CLIENT_DONT_DESTROY(client);
@@ -1115,8 +1169,7 @@ static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata)
return client_initialize_events(client, client_receive_message_raw);
}
-static int client_timeout_t1(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) {
sd_dhcp_client *client = userdata;
DHCP_CLIENT_DONT_DESTROY(client);
@@ -1126,8 +1179,7 @@ static int client_timeout_t1(sd_event_source *s, uint64_t usec,
return client_initialize_time_events(client);
}
-static int client_handle_offer(sd_dhcp_client *client, DHCPMessage *offer,
- size_t len) {
+static int client_handle_offer(sd_dhcp_client *client, DHCPMessage *offer, size_t len) {
_cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
int r;
@@ -1178,8 +1230,7 @@ static int client_handle_offer(sd_dhcp_client *client, DHCPMessage *offer,
return 0;
}
-static int client_handle_forcerenew(sd_dhcp_client *client, DHCPMessage *force,
- size_t len) {
+static int client_handle_forcerenew(sd_dhcp_client *client, DHCPMessage *force, size_t len) {
int r;
r = dhcp_option_parse(force, len, NULL, NULL, NULL);
@@ -1191,8 +1242,7 @@ static int client_handle_forcerenew(sd_dhcp_client *client, DHCPMessage *force,
return 0;
}
-static int client_handle_ack(sd_dhcp_client *client, DHCPMessage *ack,
- size_t len) {
+static int client_handle_ack(sd_dhcp_client *client, DHCPMessage *ack, size_t len) {
_cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
_cleanup_free_ char *error_message = NULL;
int r;
@@ -1420,8 +1470,7 @@ static int client_set_lease_timeouts(sd_dhcp_client *client) {
return 0;
}
-static int client_handle_message(sd_dhcp_client *client, DHCPMessage *message,
- int len) {
+static int client_handle_message(sd_dhcp_client *client, DHCPMessage *message, int len) {
DHCP_CLIENT_DONT_DESTROY(client);
char time_string[FORMAT_TIMESPAN_MAX];
int r = 0, notify_event = 0;
@@ -1567,8 +1616,12 @@ error:
return r;
}
-static int client_receive_message_udp(sd_event_source *s, int fd,
- uint32_t revents, void *userdata) {
+static int client_receive_message_udp(
+ sd_event_source *s,
+ int fd,
+ uint32_t revents,
+ void *userdata) {
+
sd_dhcp_client *client = userdata;
_cleanup_free_ DHCPMessage *message = NULL;
const struct ether_addr zero_mac = { { 0, 0, 0, 0, 0, 0 } };
@@ -1645,8 +1698,12 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
return client_handle_message(client, message, len);
}
-static int client_receive_message_raw(sd_event_source *s, int fd,
- uint32_t revents, void *userdata) {
+static int client_receive_message_raw(
+ sd_event_source *s,
+ int fd,
+ uint32_t revents,
+ void *userdata) {
+
sd_dhcp_client *client = userdata;
_cleanup_free_ DHCPPacket *packet = NULL;
uint8_t cmsgbuf[CMSG_LEN(sizeof(struct tpacket_auxdata))];
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index ee4fb4fc1e..4adb053a57 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -111,7 +111,10 @@ DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int);
static int client_start(sd_dhcp6_client *client, enum DHCP6State state);
-int sd_dhcp6_client_set_callback(sd_dhcp6_client *client, sd_dhcp6_client_callback_t cb, void *userdata) {
+int sd_dhcp6_client_set_callback(
+ sd_dhcp6_client *client,
+ sd_dhcp6_client_callback_t cb,
+ void *userdata) {
assert_return(client, -EINVAL);
client->cb = cb;
@@ -131,7 +134,10 @@ int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index) {
return 0;
}
-int sd_dhcp6_client_set_local_address(sd_dhcp6_client *client, const struct in6_addr *local_address) {
+int sd_dhcp6_client_set_local_address(
+ sd_dhcp6_client *client,
+ const struct in6_addr *local_address) {
+
assert_return(client, -EINVAL);
assert_return(local_address, -EINVAL);
assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL);
@@ -180,20 +186,38 @@ static int client_ensure_duid(sd_dhcp6_client *client) {
return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len);
}
-int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t duid_type,
- uint8_t *duid, size_t duid_len) {
+/**
+ * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid
+ * without further modification. Otherwise, if duid_type is supported, DUID
+ * is set based on that type. Otherwise, an error is returned.
+ */
+int sd_dhcp6_client_set_duid(
+ sd_dhcp6_client *client,
+ uint16_t duid_type,
+ const void *duid,
+ size_t duid_len) {
+
int r;
assert_return(client, -EINVAL);
+ assert_return(duid_len == 0 || duid != NULL, -EINVAL);
assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
- if (duid_len > 0) {
+ if (duid != NULL) {
r = dhcp_validate_duid_len(duid_type, duid_len);
if (r < 0)
return r;
+ }
+
+ if (duid != NULL) {
client->duid.type = htobe16(duid_type);
memcpy(&client->duid.raw.data, duid, duid_len);
- client->duid_len = duid_len + sizeof(client->duid.type);
- }
+ client->duid_len = sizeof(client->duid.type) + duid_len;
+ } else if (duid_type == DUID_TYPE_EN) {
+ r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len);
+ if (r < 0)
+ return r;
+ } else
+ return -EOPNOTSUPP;
return 0;
}
@@ -427,8 +451,7 @@ static int client_send_message(sd_dhcp6_client *client, usec_t time_now) {
return 0;
}
-static int client_timeout_t2(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) {
sd_dhcp6_client *client = userdata;
assert_return(s, -EINVAL);
@@ -445,8 +468,7 @@ static int client_timeout_t2(sd_event_source *s, uint64_t usec,
return 0;
}
-static int client_timeout_t1(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) {
sd_dhcp6_client *client = userdata;
assert_return(s, -EINVAL);
@@ -463,8 +485,7 @@ static int client_timeout_t1(sd_event_source *s, uint64_t usec,
return 0;
}
-static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) {
sd_dhcp6_client *client = userdata;
DHCP6_CLIENT_DONT_DESTROY(client);
enum DHCP6State state;
@@ -490,8 +511,7 @@ static usec_t client_timeout_compute_random(usec_t val) {
(random_u32() % (2 * USEC_PER_SEC)) * val / 10 / USEC_PER_SEC;
}
-static int client_timeout_resend(sd_event_source *s, uint64_t usec,
- void *userdata) {
+static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) {
int r = 0;
sd_dhcp6_client *client = userdata;
usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0;
@@ -658,9 +678,11 @@ static int client_ensure_iaid(sd_dhcp6_client *client) {
return 0;
}
-static int client_parse_message(sd_dhcp6_client *client,
- DHCP6Message *message, size_t len,
- sd_dhcp6_lease *lease) {
+static int client_parse_message(
+ sd_dhcp6_client *client,
+ DHCP6Message *message,
+ size_t len,
+ sd_dhcp6_lease *lease) {
int r;
uint8_t *optval, *option, *id = NULL;
uint16_t optcode, status;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 00:19:55 +0000