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path: root/src/libsystemd-network/sd-dhcp6-client.c
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Diffstat (limited to 'src/libsystemd-network/sd-dhcp6-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index d98ae0294a..7be64244ad 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -46,6 +46,9 @@ struct sd_dhcp6_client {
int index;
struct ether_addr mac_addr;
DHCP6IA ia_na;
+ be32_t transaction_id;
+ int fd;
+ sd_event_source *receive_message;
usec_t retransmit_time;
uint8_t retransmit_count;
sd_event_source *timeout_resend;
@@ -60,6 +63,24 @@ struct sd_dhcp6_client {
} _packed_ duid;
};
+const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = {
+ [DHCP6_SOLICIT] = "SOLICIT",
+ [DHCP6_ADVERTISE] = "ADVERTISE",
+ [DHCP6_REQUEST] = "REQUEST",
+ [DHCP6_CONFIRM] = "CONFIRM",
+ [DHCP6_RENEW] = "RENEW",
+ [DHCP6_REBIND] = "REBIND",
+ [DHCP6_REPLY] = "REPLY",
+ [DHCP6_RELEASE] = "RELEASE",
+ [DHCP6_DECLINE] = "DECLINE",
+ [DHCP6_RECONFIGURE] = "RECONFIGURE",
+ [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST",
+ [DHCP6_RELAY_FORW] = "RELAY-FORW",
+ [DHCP6_RELAY_REPL] = "RELAY-REPL",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int);
+
int sd_dhcp6_client_set_callback(sd_dhcp6_client *client,
sd_dhcp6_client_cb_t cb, void *userdata)
{
@@ -108,6 +129,14 @@ static int client_initialize(sd_dhcp6_client *client)
{
assert_return(client, -EINVAL);
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+
+ if (client->fd > 0)
+ client->fd = safe_close(client->fd);
+
+ client->transaction_id = random_u32() & 0x00ffffff;
+
client->ia_na.timeout_t1 =
sd_event_source_unref(client->ia_na.timeout_t1);
client->ia_na.timeout_t2 =
@@ -134,6 +163,55 @@ static sd_dhcp6_client *client_stop(sd_dhcp6_client *client, int error) {
return client;
}
+static int client_send_message(sd_dhcp6_client *client) {
+ _cleanup_free_ DHCP6Message *message = NULL;
+ struct in6_addr all_servers =
+ IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
+ size_t len, optlen = 512;
+ uint8_t *opt;
+ int r;
+
+ len = sizeof(DHCP6Message) + optlen;
+
+ message = malloc0(len);
+ if (!message)
+ return -ENOMEM;
+
+ opt = (uint8_t *)(message + 1);
+
+ message->transaction_id = client->transaction_id;
+
+ switch(client->state) {
+ case DHCP6_STATE_SOLICITATION:
+ message->type = DHCP6_SOLICIT;
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_CLIENTID,
+ sizeof(client->duid), &client->duid);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_option_append_ia(&opt, &optlen, &client->ia_na);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_STATE_STOPPED:
+ case DHCP6_STATE_RS:
+ return -EINVAL;
+ }
+
+ r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message,
+ len - optlen);
+ if (r < 0)
+ return r;
+
+ log_dhcp6_client(client, "Sent %s",
+ dhcp6_message_type_to_string(message->type));
+
+ return 0;
+}
+
static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec,
void *userdata) {
sd_dhcp6_client *client = userdata;
@@ -187,6 +265,11 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
return 0;
}
+ r = client_send_message(client);
+ if (r >= 0)
+ client->retransmit_count++;
+
+
r = sd_event_now(client->event, CLOCK_MONOTONIC, &time_now);
if (r < 0)
goto error;
@@ -194,6 +277,10 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
if (!client->retransmit_time) {
client->retransmit_time =
client_timeout_compute_random(init_retransmit_time);
+
+ if (client->state == DHCP6_STATE_SOLICITATION)
+ client->retransmit_time += init_retransmit_time / 10;
+
} else {
if (max_retransmit_time &&
client->retransmit_time > max_retransmit_time / 2)
@@ -290,6 +377,12 @@ static int client_ensure_iaid(sd_dhcp6_client *client) {
return 0;
}
+static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
+ void *userdata)
+{
+ return 0;
+}
+
static int client_start(sd_dhcp6_client *client)
{
int r;
@@ -302,6 +395,23 @@ static int client_start(sd_dhcp6_client *client)
if (r < 0)
return r;
+ r = dhcp6_network_bind_udp_socket(client->index, NULL);
+ if (r < 0)
+ return r;
+
+ client->fd = r;
+
+ r = sd_event_add_io(client->event, &client->receive_message,
+ client->fd, EPOLLIN, client_receive_message,
+ client);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->receive_message,
+ client->event_priority);
+ if (r < 0)
+ return r;
+
client->state = DHCP6_STATE_SOLICITATION;
r = sd_event_add_time(client->event, &client->timeout_resend,