int sd_icmp6_router_solicitation_start(sd_icmp6_nd *nd) {
int r;
assert(nd);
assert(nd->event);
if (nd->state != ICMP6_NEIGHBOR_DISCOVERY_IDLE)
return -EINVAL;
if (nd->index < 1)
return -EINVAL;
r = dhcp_network_icmp6_bind_router_solicitation(nd->index);
if (r < 0)
return r;
nd->fd = r;
r = sd_event_add_io(nd->event, &nd->recv, nd->fd, EPOLLIN,
icmp6_router_advertisment_recv, nd);
if (r < 0)
goto error;
r = sd_event_source_set_priority(nd->recv, nd->event_priority);
if (r < 0)
goto error;
r = sd_event_source_set_description(nd->recv, "icmp6-receive-message");
if (r < 0)
goto error;
r = sd_event_add_time(nd->event, &nd->timeout, clock_boottime_or_monotonic(),
0, 0, icmp6_router_solicitation_timeout, nd);
if (r < 0)
goto error;
r = sd_event_source_set_priority(nd->timeout, nd->event_priority);
if (r < 0)
goto error;
r = sd_event_source_set_description(nd->timeout, "icmp6-timeout");
error:
if (r < 0)
icmp6_nd_init(nd);
else
log_icmp6_nd(client, "Start Router Solicitation");
return r;
}
static int scope_arm_timer(Scope *s, usec_t usec) {
int r;
assert(s);
if (s->timer_event_source) {
r = sd_event_source_set_time(s->timer_event_source, usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
}
if (usec == USEC_INFINITY)
return 0;
r = sd_event_add_time(
UNIT(s)->manager->event,
&s->timer_event_source,
CLOCK_MONOTONIC,
usec, 0,
scope_dispatch_timer, s);
if (r < 0)
return r;
(void) sd_event_source_set_description(s->timer_event_source, "scope-timer");
return 0;
}
static int automount_coldplug(Unit *u) {
Automount *a = AUTOMOUNT(u);
int r;
assert(a);
assert(a->state == AUTOMOUNT_DEAD);
if (a->deserialized_state != a->state) {
r = open_dev_autofs(u->manager);
if (r < 0)
return r;
if (a->deserialized_state == AUTOMOUNT_WAITING ||
a->deserialized_state == AUTOMOUNT_RUNNING) {
assert(a->pipe_fd >= 0);
r = sd_event_add_io(u->manager->event, &a->pipe_event_source, a->pipe_fd, EPOLLIN, automount_dispatch_io, u);
if (r < 0)
return r;
(void) sd_event_source_set_description(a->pipe_event_source, "automount-io");
}
automount_set_state(a, a->deserialized_state);
}
return 0;
}
static int automount_start_expire(Automount *a) {
int r;
usec_t timeout;
assert(a);
if (a->timeout_idle_usec == 0)
return 0;
timeout = now(CLOCK_MONOTONIC) + MAX(a->timeout_idle_usec/3, USEC_PER_SEC);
if (a->expire_event_source) {
r = sd_event_source_set_time(a->expire_event_source, timeout);
if (r < 0)
return r;
return sd_event_source_set_enabled(a->expire_event_source, SD_EVENT_ONESHOT);
}
r = sd_event_add_time(
UNIT(a)->manager->event,
&a->expire_event_source,
CLOCK_MONOTONIC, timeout, 0,
automount_dispatch_expire, a);
if (r < 0)
return r;
(void) sd_event_source_set_description(a->expire_event_source, "automount-expire");
return 0;
}
static int curl_glue_timer_callback(CURLM *curl, long timeout_ms, void *userdata) {
CurlGlue *g = userdata;
usec_t usec;
assert(curl);
assert(g);
if (timeout_ms < 0) {
if (g->timer) {
if (sd_event_source_set_enabled(g->timer, SD_EVENT_OFF) < 0)
return -1;
}
return 0;
}
usec = now(clock_boottime_or_monotonic()) + (usec_t) timeout_ms * USEC_PER_MSEC + USEC_PER_MSEC - 1;
if (g->timer) {
if (sd_event_source_set_time(g->timer, usec) < 0)
return -1;
if (sd_event_source_set_enabled(g->timer, SD_EVENT_ONESHOT) < 0)
return -1;
} else {
if (sd_event_add_time(g->event, &g->timer, clock_boottime_or_monotonic(), usec, 0, curl_glue_on_timer, g) < 0)
return -1;
(void) sd_event_source_set_description(g->timer, "curl-timer");
}
return 0;
}
_public_ int sd_lldp_start(sd_lldp *lldp) {
int r;
assert_return(lldp, -EINVAL);
if (lldp->fd >= 0)
return 0;
assert(!lldp->io_event_source);
lldp->fd = lldp_network_bind_raw_socket(lldp->ifindex);
if (lldp->fd < 0)
return lldp->fd;
if (lldp->event) {
r = sd_event_add_io(lldp->event, &lldp->io_event_source, lldp->fd, EPOLLIN, lldp_receive_datagram, lldp);
if (r < 0)
goto fail;
r = sd_event_source_set_priority(lldp->io_event_source, lldp->event_priority);
if (r < 0)
goto fail;
(void) sd_event_source_set_description(lldp->io_event_source, "lldp-io");
}
return 1;
fail:
lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
lldp->fd = safe_close(lldp->fd);
return r;
}
static int busname_watch_fd(BusName *n) {
int r;
assert(n);
if (n->starter_fd < 0)
return 0;
if (n->starter_event_source) {
r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON);
if (r < 0)
goto fail;
} else {
r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n);
if (r < 0)
goto fail;
(void) sd_event_source_set_description(n->starter_event_source, "busname-starter");
}
return 0;
fail:
log_unit_warning_errno(UNIT(n), r, "Failed to watch starter fd: %m");
busname_unwatch_fd(n);
return r;
}
static int scope_arm_timer(Scope *s) {
int r;
assert(s);
if (s->timeout_stop_usec <= 0) {
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
return 0;
}
if (s->timer_event_source) {
r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_stop_usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
}
r = sd_event_add_time(
UNIT(s)->manager->event,
&s->timer_event_source,
CLOCK_MONOTONIC,
now(CLOCK_MONOTONIC) + s->timeout_stop_usec, 0,
scope_dispatch_timer, s);
if (r < 0)
return r;
(void) sd_event_source_set_description(s->timer_event_source, "scope-timer");
return 0;
}
static int ipv4acd_set_next_wakeup(sd_ipv4acd *acd, usec_t usec, usec_t random_usec) {
_cleanup_(sd_event_source_unrefp) sd_event_source *timer = NULL;
usec_t next_timeout, time_now;
int r;
assert(acd);
next_timeout = usec;
if (random_usec > 0)
next_timeout += (usec_t) random_u64() % random_usec;
assert_se(sd_event_now(acd->event, clock_boottime_or_monotonic(), &time_now) >= 0);
r = sd_event_add_time(acd->event, &timer, clock_boottime_or_monotonic(), time_now + next_timeout, 0, ipv4acd_on_timeout, acd);
if (r < 0)
return r;
r = sd_event_source_set_priority(timer, acd->event_priority);
if (r < 0)
return r;
(void) sd_event_source_set_description(timer, "ipv4acd-timer");
sd_event_source_unref(acd->timer_event_source);
acd->timer_event_source = timer;
timer = NULL;
return 0;
}
static int busname_arm_timer(BusName *n, usec_t usec) {
int r;
assert(n);
if (n->timer_event_source) {
r = sd_event_source_set_time(n->timer_event_source, usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT);
}
if (usec == USEC_INFINITY)
return 0;
r = sd_event_add_time(
UNIT(n)->manager->event,
&n->timer_event_source,
CLOCK_MONOTONIC,
usec, 0,
busname_dispatch_timer, n);
if (r < 0)
return r;
(void) sd_event_source_set_description(n->timer_event_source, "busname-timer");
return 0;
}
static int busname_arm_timer(BusName *n) {
int r;
assert(n);
if (n->timeout_usec <= 0) {
n->timer_event_source = sd_event_source_unref(n->timer_event_source);
return 0;
}
if (n->timer_event_source) {
r = sd_event_source_set_time(n->timer_event_source, now(CLOCK_MONOTONIC) + n->timeout_usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT);
}
r = sd_event_add_time(
UNIT(n)->manager->event,
&n->timer_event_source,
CLOCK_MONOTONIC,
now(CLOCK_MONOTONIC) + n->timeout_usec, 0,
busname_dispatch_timer, n);
if (r < 0)
return r;
(void) sd_event_source_set_description(n->timer_event_source, "busname-timer");
return 0;
}
static int automount_coldplug(Unit *u) {
Automount *a = AUTOMOUNT(u);
int r;
assert(a);
assert(a->state == AUTOMOUNT_DEAD);
if (a->deserialized_state != a->state) {
r = open_dev_autofs(u->manager);
if (r < 0)
return r;
if (a->deserialized_state == AUTOMOUNT_WAITING ||
a->deserialized_state == AUTOMOUNT_RUNNING) {
assert(a->pipe_fd >= 0);
r = sd_event_add_io(u->manager->event, &a->pipe_event_source, a->pipe_fd, EPOLLIN, automount_dispatch_io, u);
if (r < 0)
return r;
(void) sd_event_source_set_description(a->pipe_event_source, "automount-io");
if (a->deserialized_state == AUTOMOUNT_RUNNING) {
r = automount_start_expire(a);
if (r < 0)
log_unit_warning_errno(UNIT(a), r, "Failed to start expiration timer, ignoring: %m");
}
}
automount_set_state(a, a->deserialized_state);
}
return 0;
}
int link_lldp_emit_start(Link *link) {
usec_t next;
int r;
assert(link);
if (!link->network || link->network->lldp_emit == LLDP_EMIT_NO) {
link_lldp_emit_stop(link);
return 0;
}
/* Starts the LLDP transmission in "fast" mode. If it is already started, turns "fast" mode back on again. */
link->lldp_tx_fast = LLDP_TX_FAST_INIT;
next = usec_add(usec_add(now(clock_boottime_or_monotonic()), LLDP_FAST_TX_USEC),
(usec_t) random_u64() % LLDP_JITTER_USEC);
if (link->lldp_emit_event_source) {
usec_t old;
/* Lower the timeout, maybe */
r = sd_event_source_get_time(link->lldp_emit_event_source, &old);
if (r < 0)
return r;
if (old <= next)
return 0;
return sd_event_source_set_time(link->lldp_emit_event_source, next);
} else {
r = sd_event_add_time(
link->manager->event,
&link->lldp_emit_event_source,
clock_boottime_or_monotonic(),
next,
0,
on_lldp_timer,
link);
if (r < 0)
return r;
(void) sd_event_source_set_description(link->lldp_emit_event_source, "lldp-tx");
}
return 0;
}
int sd_ipv4acd_start(sd_ipv4acd *ll) {
int r;
assert_return(ll, -EINVAL);
assert_return(ll->event, -EINVAL);
assert_return(ll->index > 0, -EINVAL);
assert_return(ll->address != 0, -EINVAL);
assert_return(!ether_addr_is_nul(&ll->mac_addr), -EINVAL);
assert_return(ll->state == IPV4ACD_STATE_INIT, -EBUSY);
ll->defend_window = 0;
r = arp_network_bind_raw_socket(ll->index, ll->address, &ll->mac_addr);
if (r < 0)
goto out;
ll->fd = safe_close(ll->fd);
ll->fd = r;
r = sd_event_add_io(ll->event, &ll->receive_message, ll->fd,
EPOLLIN, ipv4acd_on_packet, ll);
if (r < 0)
goto out;
r = sd_event_source_set_priority(ll->receive_message, ll->event_priority);
if (r < 0)
goto out;
r = sd_event_source_set_description(ll->receive_message, "ipv4acd-receive-message");
if (r < 0)
goto out;
r = ipv4acd_set_next_wakeup(ll, 0, 0);
if (r < 0)
goto out;
out:
if (r < 0) {
ipv4acd_stop(ll);
return r;
}
return 0;
}
int sd_ipv4acd_start(sd_ipv4acd *acd) {
int r;
assert_return(acd, -EINVAL);
assert_return(acd->event, -EINVAL);
assert_return(acd->ifindex > 0, -EINVAL);
assert_return(acd->address != 0, -EINVAL);
assert_return(!ether_addr_is_null(&acd->mac_addr), -EINVAL);
assert_return(acd->state == IPV4ACD_STATE_INIT, -EBUSY);
r = arp_network_bind_raw_socket(acd->ifindex, acd->address, &acd->mac_addr);
if (r < 0)
return r;
safe_close(acd->fd);
acd->fd = r;
acd->defend_window = 0;
acd->n_conflict = 0;
r = sd_event_add_io(acd->event, &acd->receive_message_event_source, acd->fd, EPOLLIN, ipv4acd_on_packet, acd);
if (r < 0)
goto fail;
r = sd_event_source_set_priority(acd->receive_message_event_source, acd->event_priority);
if (r < 0)
goto fail;
(void) sd_event_source_set_description(acd->receive_message_event_source, "ipv4acd-receive-message");
r = ipv4acd_set_next_wakeup(acd, 0, 0);
if (r < 0)
goto fail;
ipv4acd_set_state(acd, IPV4ACD_STATE_STARTED, true);
return 0;
fail:
ipv4acd_reset(acd);
return r;
}
static int lldp_start_timer(sd_lldp *lldp, sd_lldp_neighbor *neighbor) {
sd_lldp_neighbor *n;
int r;
assert(lldp);
if (neighbor)
lldp_neighbor_start_ttl(neighbor);
n = prioq_peek(lldp->neighbor_by_expiry);
if (!n) {
if (lldp->timer_event_source)
return sd_event_source_set_enabled(lldp->timer_event_source, SD_EVENT_OFF);
return 0;
}
if (lldp->timer_event_source) {
r = sd_event_source_set_time(lldp->timer_event_source, n->until);
if (r < 0)
return r;
return sd_event_source_set_enabled(lldp->timer_event_source, SD_EVENT_ONESHOT);
}
if (!lldp->event)
return 0;
r = sd_event_add_time(lldp->event, &lldp->timer_event_source, clock_boottime_or_monotonic(), n->until, 0, on_timer_event, lldp);
if (r < 0)
return r;
r = sd_event_source_set_priority(lldp->timer_event_source, lldp->event_priority);
if (r < 0)
return r;
(void) sd_event_source_set_description(lldp->timer_event_source, "lldp-timer");
return 0;
}
int lldp_port_start(lldp_port *p) {
int r;
assert_return(p, -EINVAL);
r = lldp_network_bind_raw_socket(p->ifindex);
if (r < 0)
return r;
p->rawfd = r;
r = sd_event_add_io(p->event, &p->lldp_port_rx,
p->rawfd, EPOLLIN, lldp_receive_packet, p);
if (r < 0) {
log_debug_errno(r, "Failed to allocate event source: %m");
goto fail;
}
r = sd_event_source_set_priority(p->lldp_port_rx, p->event_priority);
if (r < 0) {
log_debug_errno(r, "Failed to set event priority: %m");
goto fail;
}
r = sd_event_source_set_description(p->lldp_port_rx, "lldp-port-rx");
if (r < 0) {
log_debug_errno(r, "Failed to set event name: %m");
goto fail;
}
return 0;
fail:
lldp_port_stop(p);
return r;
}
static int ipv4acd_set_next_wakeup(sd_ipv4acd *ll, int sec, int random_sec) {
_cleanup_(sd_event_source_unrefp) sd_event_source *timer = NULL;
usec_t next_timeout;
usec_t time_now;
int r;
assert(sec >= 0);
assert(random_sec >= 0);
assert(ll);
next_timeout = sec * USEC_PER_SEC;
if (random_sec)
next_timeout += random_u32() % (random_sec * USEC_PER_SEC);
assert_se(sd_event_now(ll->event, clock_boottime_or_monotonic(), &time_now) >= 0);
r = sd_event_add_time(ll->event, &timer, clock_boottime_or_monotonic(),
time_now + next_timeout, 0, ipv4acd_on_timeout, ll);
if (r < 0)
return r;
r = sd_event_source_set_priority(timer, ll->event_priority);
if (r < 0)
return r;
r = sd_event_source_set_description(timer, "ipv4acd-timer");
if (r < 0)
return r;
ll->timer = sd_event_source_unref(ll->timer);
ll->timer = timer;
timer = NULL;
return 0;
}
static int curl_glue_socket_callback(CURLM *curl, curl_socket_t s, int action, void *userdata, void *socketp) {
sd_event_source *io;
CurlGlue *g = userdata;
uint32_t events = 0;
int r;
assert(curl);
assert(g);
io = hashmap_get(g->ios, FD_TO_PTR(s));
if (action == CURL_POLL_REMOVE) {
if (io) {
int fd;
fd = sd_event_source_get_io_fd(io);
assert(fd >= 0);
sd_event_source_set_enabled(io, SD_EVENT_OFF);
sd_event_source_unref(io);
hashmap_remove(g->ios, FD_TO_PTR(s));
hashmap_remove(g->translate_fds, FD_TO_PTR(fd));
safe_close(fd);
}
return 0;
}
r = hashmap_ensure_allocated(&g->ios, &trivial_hash_ops);
if (r < 0) {
log_oom();
return -1;
}
r = hashmap_ensure_allocated(&g->translate_fds, &trivial_hash_ops);
if (r < 0) {
log_oom();
return -1;
}
if (action == CURL_POLL_IN)
events = EPOLLIN;
else if (action == CURL_POLL_OUT)
events = EPOLLOUT;
else if (action == CURL_POLL_INOUT)
events = EPOLLIN|EPOLLOUT;
if (io) {
if (sd_event_source_set_io_events(io, events) < 0)
return -1;
if (sd_event_source_set_enabled(io, SD_EVENT_ON) < 0)
return -1;
} else {
_cleanup_close_ int fd = -1;
/* When curl needs to remove an fd from us it closes
* the fd first, and only then calls into us. This is
* nasty, since we cannot pass the fd on to epoll()
* anymore. Hence, duplicate the fds here, and keep a
* copy for epoll which we control after use. */
fd = fcntl(s, F_DUPFD_CLOEXEC, 3);
if (fd < 0)
return -1;
if (sd_event_add_io(g->event, &io, fd, events, curl_glue_on_io, g) < 0)
return -1;
(void) sd_event_source_set_description(io, "curl-io");
r = hashmap_put(g->ios, FD_TO_PTR(s), io);
if (r < 0) {
log_oom();
sd_event_source_unref(io);
return -1;
}
r = hashmap_put(g->translate_fds, FD_TO_PTR(fd), FD_TO_PTR(s));
if (r < 0) {
log_oom();
hashmap_remove(g->ios, FD_TO_PTR(s));
sd_event_source_unref(io);
return -1;
}
fd = -1;
}
return 0;
}
static int icmp6_router_solicitation_timeout(sd_event_source *s, uint64_t usec,
void *userdata)
{
sd_icmp6_nd *nd = userdata;
uint64_t time_now, next_timeout;
struct ether_addr unset = { };
struct ether_addr *addr = NULL;
int r;
assert(s);
assert(nd);
assert(nd->event);
nd->timeout = sd_event_source_unref(nd->timeout);
if (nd->nd_sent >= ICMP6_MAX_ROUTER_SOLICITATIONS) {
icmp6_nd_notify(nd, ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT);
nd->state = ICMP6_ROUTER_ADVERTISMENT_LISTEN;
} else {
if (memcmp(&nd->mac_addr, &unset, sizeof(struct ether_addr)))
addr = &nd->mac_addr;
r = dhcp_network_icmp6_send_router_solicitation(nd->fd, addr);
if (r < 0)
log_icmp6_nd(nd, "Error sending Router Solicitation");
else {
nd->state = ICMP6_ROUTER_SOLICITATION_SENT;
log_icmp6_nd(nd, "Sent Router Solicitation");
}
nd->nd_sent++;
r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
if (r < 0) {
icmp6_nd_notify(nd, r);
return 0;
}
next_timeout = time_now + ICMP6_ROUTER_SOLICITATION_INTERVAL;
r = sd_event_add_time(nd->event, &nd->timeout, clock_boottime_or_monotonic(),
next_timeout, 0,
icmp6_router_solicitation_timeout, nd);
if (r < 0) {
icmp6_nd_notify(nd, r);
return 0;
}
r = sd_event_source_set_priority(nd->timeout,
nd->event_priority);
if (r < 0) {
icmp6_nd_notify(nd, r);
return 0;
}
r = sd_event_source_set_description(nd->timeout, "icmp6-timeout");
if (r < 0) {
icmp6_nd_notify(nd, r);
return 0;
}
}
return 0;
}
int sd_ipv4ll_start (sd_ipv4ll *ll) {
int r;
assert_return(ll, -EINVAL);
assert_return(ll->event, -EINVAL);
assert_return(ll->index > 0, -EINVAL);
assert_return(IN_SET(ll->state, IPV4LL_STATE_INIT,
IPV4LL_STATE_STOPPED), -EBUSY);
ll->state = IPV4LL_STATE_INIT;
r = arp_network_bind_raw_socket(ll->index, &ll->link);
if (r < 0)
goto out;
ll->fd = r;
ll->conflict = 0;
ll->defend_window = 0;
ll->claimed_address = 0;
if (!ll->random_data) {
uint8_t seed[8];
/* Fallback to mac */
siphash24(seed, &ll->mac_addr.ether_addr_octet,
ETH_ALEN, HASH_KEY.bytes);
r = sd_ipv4ll_set_address_seed(ll, seed);
if (r < 0)
goto out;
}
if (ll->address == 0) {
r = ipv4ll_pick_address(ll, &ll->address);
if (r < 0)
goto out;
}
ipv4ll_set_state (ll, IPV4LL_STATE_INIT, 1);
r = sd_event_add_io(ll->event, &ll->receive_message, ll->fd,
EPOLLIN, ipv4ll_receive_message, ll);
if (r < 0)
goto out;
r = sd_event_source_set_priority(ll->receive_message, ll->event_priority);
if (r < 0)
goto out;
r = sd_event_source_set_description(ll->receive_message, "ipv4ll-receive-message");
if (r < 0)
goto out;
r = sd_event_add_time(ll->event,
&ll->timer,
clock_boottime_or_monotonic(),
now(clock_boottime_or_monotonic()), 0,
ipv4ll_timer, ll);
if (r < 0)
goto out;
r = sd_event_source_set_priority(ll->timer, ll->event_priority);
if (r < 0)
goto out;
r = sd_event_source_set_description(ll->timer, "ipv4ll-timer");
out:
if (r < 0)
ipv4ll_stop(ll, IPV4LL_EVENT_STOP);
return 0;
}
static void ipv4ll_run_state_machine(sd_ipv4ll *ll, IPv4LLTrigger trigger, void *trigger_data) {
struct ether_arp out_packet;
int out_packet_ready = 0;
int r = 0;
assert(ll);
assert(trigger < _IPV4LL_TRIGGER_MAX);
if (ll->state == IPV4LL_STATE_INIT) {
log_ipv4ll(ll, "PROBE");
ipv4ll_set_state(ll, IPV4LL_STATE_WAITING_PROBE, 1);
ipv4ll_set_next_wakeup(ll, 0, PROBE_WAIT);
} else if ((ll->state == IPV4LL_STATE_WAITING_PROBE && trigger == IPV4LL_TRIGGER_TIMEOUT) ||
(ll->state == IPV4LL_STATE_PROBING && trigger == IPV4LL_TRIGGER_TIMEOUT && ll->iteration < PROBE_NUM-2)) {
/* Send a probe */
arp_packet_probe(&out_packet, ll->address, &ll->mac_addr);
out_packet_ready = 1;
ipv4ll_set_state(ll, IPV4LL_STATE_PROBING, 0);
ipv4ll_set_next_wakeup(ll, PROBE_MIN, (PROBE_MAX-PROBE_MIN));
} else if (ll->state == IPV4LL_STATE_PROBING && trigger == IPV4LL_TRIGGER_TIMEOUT && ll->iteration >= PROBE_NUM-2) {
/* Send the last probe */
arp_packet_probe(&out_packet, ll->address, &ll->mac_addr);
out_packet_ready = 1;
ipv4ll_set_state(ll, IPV4LL_STATE_WAITING_ANNOUNCE, 1);
ipv4ll_set_next_wakeup(ll, ANNOUNCE_WAIT, 0);
} else if ((ll->state == IPV4LL_STATE_WAITING_ANNOUNCE && trigger == IPV4LL_TRIGGER_TIMEOUT) ||
(ll->state == IPV4LL_STATE_ANNOUNCING && trigger == IPV4LL_TRIGGER_TIMEOUT && ll->iteration < ANNOUNCE_NUM-1)) {
/* Send announcement packet */
arp_packet_announcement(&out_packet, ll->address, &ll->mac_addr);
out_packet_ready = 1;
ipv4ll_set_state(ll, IPV4LL_STATE_ANNOUNCING, 0);
ipv4ll_set_next_wakeup(ll, ANNOUNCE_INTERVAL, 0);
if (ll->iteration == 0) {
log_ipv4ll(ll, "ANNOUNCE");
ll->claimed_address = ll->address;
ll = ipv4ll_client_notify(ll, IPV4LL_EVENT_BIND);
if (!ll || ll->state == IPV4LL_STATE_STOPPED)
goto out;
ll->conflict = 0;
}
} else if ((ll->state == IPV4LL_STATE_ANNOUNCING && trigger == IPV4LL_TRIGGER_TIMEOUT &&
ll->iteration >= ANNOUNCE_NUM-1)) {
ipv4ll_set_state(ll, IPV4LL_STATE_RUNNING, 0);
ll->next_wakeup_valid = 0;
} else if (trigger == IPV4LL_TRIGGER_PACKET) {
int conflicted = 0;
usec_t time_now;
struct ether_arp* in_packet = (struct ether_arp*)trigger_data;
assert(in_packet);
if (IN_SET(ll->state, IPV4LL_STATE_ANNOUNCING, IPV4LL_STATE_RUNNING)) {
if (ipv4ll_arp_conflict(ll, in_packet)) {
r = sd_event_now(ll->event, clock_boottime_or_monotonic(), &time_now);
if (r < 0)
goto out;
/* Defend address */
if (time_now > ll->defend_window) {
ll->defend_window = time_now + DEFEND_INTERVAL * USEC_PER_SEC;
arp_packet_announcement(&out_packet, ll->address, &ll->mac_addr);
out_packet_ready = 1;
} else
conflicted = 1;
}
} else if (IN_SET(ll->state, IPV4LL_STATE_WAITING_PROBE,
IPV4LL_STATE_PROBING,
IPV4LL_STATE_WAITING_ANNOUNCE)) {
conflicted = ipv4ll_arp_probe_conflict(ll, in_packet);
}
if (conflicted) {
log_ipv4ll(ll, "CONFLICT");
ll = ipv4ll_client_notify(ll, IPV4LL_EVENT_CONFLICT);
if (!ll || ll->state == IPV4LL_STATE_STOPPED)
goto out;
ll->claimed_address = 0;
/* Pick a new address */
r = ipv4ll_pick_address(ll, &ll->address);
if (r < 0)
goto out;
ll->conflict++;
ll->defend_window = 0;
ipv4ll_set_state(ll, IPV4LL_STATE_WAITING_PROBE, 1);
if (ll->conflict >= MAX_CONFLICTS) {
log_ipv4ll(ll, "MAX_CONFLICTS");
ipv4ll_set_next_wakeup(ll, RATE_LIMIT_INTERVAL, PROBE_WAIT);
} else
ipv4ll_set_next_wakeup(ll, 0, PROBE_WAIT);
}
}
if (out_packet_ready) {
r = arp_network_send_raw_socket(ll->fd, &ll->link, &out_packet);
if (r < 0) {
log_ipv4ll(ll, "failed to send arp packet out");
goto out;
}
}
if (ll->next_wakeup_valid) {
ll->timer = sd_event_source_unref(ll->timer);
r = sd_event_add_time(ll->event, &ll->timer, clock_boottime_or_monotonic(),
ll->next_wakeup, 0, ipv4ll_timer, ll);
if (r < 0)
goto out;
r = sd_event_source_set_priority(ll->timer, ll->event_priority);
if (r < 0)
goto out;
r = sd_event_source_set_description(ll->timer, "ipv4ll-timer");
if (r < 0)
goto out;
}
out:
if (r < 0 && ll)
ipv4ll_stop(ll, r);
}
static void automount_enter_waiting(Automount *a) {
_cleanup_close_ int ioctl_fd = -1;
int p[2] = { -1, -1 };
char name[sizeof("systemd-")-1 + DECIMAL_STR_MAX(pid_t) + 1];
char options[sizeof("fd=,pgrp=,minproto=5,maxproto=5,direct")-1
+ DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t) + 1];
bool mounted = false;
int r, dev_autofs_fd;
struct stat st;
assert(a);
assert(a->pipe_fd < 0);
assert(a->where);
set_clear(a->tokens);
r = unit_fail_if_symlink(UNIT(a), a->where);
if (r < 0)
goto fail;
(void) mkdir_p_label(a->where, 0555);
unit_warn_if_dir_nonempty(UNIT(a), a->where);
dev_autofs_fd = open_dev_autofs(UNIT(a)->manager);
if (dev_autofs_fd < 0) {
r = dev_autofs_fd;
goto fail;
}
if (pipe2(p, O_NONBLOCK|O_CLOEXEC) < 0) {
r = -errno;
goto fail;
}
xsprintf(options, "fd=%i,pgrp="PID_FMT",minproto=5,maxproto=5,direct", p[1], getpgrp());
xsprintf(name, "systemd-"PID_FMT, getpid());
if (mount(name, a->where, "autofs", 0, options) < 0) {
r = -errno;
goto fail;
}
mounted = true;
p[1] = safe_close(p[1]);
if (stat(a->where, &st) < 0) {
r = -errno;
goto fail;
}
ioctl_fd = open_ioctl_fd(dev_autofs_fd, a->where, st.st_dev);
if (ioctl_fd < 0) {
r = ioctl_fd;
goto fail;
}
r = autofs_protocol(dev_autofs_fd, ioctl_fd);
if (r < 0)
goto fail;
r = autofs_set_timeout(dev_autofs_fd, ioctl_fd, a->timeout_idle_usec);
if (r < 0)
goto fail;
/* Autofs fun fact:
*
* Unless we close the ioctl fd here, for some weird reason
* the direct mount will not receive events from the
* kernel. */
r = sd_event_add_io(UNIT(a)->manager->event, &a->pipe_event_source, p[0], EPOLLIN, automount_dispatch_io, a);
if (r < 0)
goto fail;
(void) sd_event_source_set_description(a->pipe_event_source, "automount-io");
a->pipe_fd = p[0];
a->dev_id = st.st_dev;
automount_set_state(a, AUTOMOUNT_WAITING);
return;
fail:
log_unit_error_errno(UNIT(a), r, "Failed to initialize automounter: %m");
safe_close_pair(p);
if (mounted) {
r = repeat_unmount(a->where, MNT_DETACH);
if (r < 0)
log_error_errno(r, "Failed to unmount, ignoring: %m");
}
automount_enter_dead(a, AUTOMOUNT_FAILURE_RESOURCES);
}
