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path: root/src/libsystemd-network/sd-dhcp-client.c
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Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c208
1 files changed, 155 insertions, 53 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index bd5ec76fc5..193f31880f 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -82,7 +82,7 @@ struct sd_dhcp_client {
} _packed_ ll;
struct {
/* 255: Node-specific (RFC 4361) */
- uint32_t iaid;
+ be32_t iaid;
struct duid duid;
} _packed_ ns;
struct {
@@ -101,7 +101,7 @@ struct sd_dhcp_client {
sd_event_source *timeout_t1;
sd_event_source *timeout_t2;
sd_event_source *timeout_expire;
- sd_dhcp_client_cb_t cb;
+ sd_dhcp_client_callback_t cb;
void *userdata;
sd_dhcp_lease *lease;
usec_t start_delay;
@@ -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_cb_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;
@@ -298,8 +318,71 @@ int sd_dhcp_client_set_client_id(sd_dhcp_client *client, uint8_t type,
return 0;
}
-int sd_dhcp_client_set_hostname(sd_dhcp_client *client,
- const char *hostname) {
+/**
+ * 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);
+ 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. */
+ if (iaid == 0) {
+ r = dhcp_identifier_set_iaid(client->index, client->mac_addr,
+ client->mac_addr_len,
+ &client->client_id.ns.iaid);
+ if (r < 0)
+ return r;
+ } else
+ client->client_id.ns.iaid = htobe32(iaid);
+
+ if (duid != NULL) {
+ client->client_id.ns.duid.type = htobe16(duid_type);
+ memcpy(&client->client_id.ns.duid.raw.data, duid, duid_len);
+ 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) + len +
+ sizeof(client->client_id.ns.iaid);
+
+ if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
+ log_dhcp_client(client, "Configured IAID+DUID, restarting.");
+ client_stop(client, SD_DHCP_CLIENT_EVENT_STOP);
+ sd_dhcp_client_start(client);
+ }
+
+ return 0;
+}
+
+int sd_dhcp_client_set_hostname(
+ sd_dhcp_client *client,
+ const char *hostname) {
+
char *new_hostname = NULL;
assert_return(client, -EINVAL);
@@ -322,8 +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);
@@ -406,9 +491,14 @@ 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) {
- _cleanup_free_ DHCPPacket *packet;
+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;
usec_t time_now;
@@ -548,8 +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;
@@ -566,8 +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);
@@ -774,8 +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;
@@ -919,8 +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);
@@ -958,7 +1060,7 @@ static int client_initialize_time_events(sd_dhcp_client *client) {
client->timeout_resend = sd_event_source_unref(client->timeout_resend);
if (client->start_delay) {
- sd_event_now(client->event, clock_boottime_or_monotonic(), &usec);
+ assert_se(sd_event_now(client->event, clock_boottime_or_monotonic(), &usec) >= 0);
usec += client->start_delay;
}
@@ -987,8 +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);
@@ -1028,8 +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);
@@ -1069,8 +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);
@@ -1080,8 +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;
@@ -1132,8 +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);
@@ -1145,8 +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;
@@ -1374,8 +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;
@@ -1521,8 +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 } };
@@ -1541,7 +1640,7 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
if (!message)
return -ENOMEM;
- len = read(fd, message, buflen);
+ len = recv(fd, message, buflen, 0);
if (len < 0) {
if (errno == EAGAIN || errno == EINTR)
return 0;
@@ -1599,8 +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))];
@@ -1691,8 +1794,7 @@ int sd_dhcp_client_stop(sd_dhcp_client *client) {
return 0;
}
-int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event,
- int priority) {
+int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int64_t priority) {
int r;
assert_return(client, -EINVAL);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-18 19:59:32 +0000