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_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_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;
}
}
return 0;
}
static int icmp6_router_advertisment_recv(sd_event_source *s, int fd,
uint32_t revents, void *userdata)
{
sd_icmp6_nd *nd = userdata;
ssize_t len;
struct nd_router_advert ra;
int event = ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE;
assert(s);
assert(nd);
assert(nd->event);
/* only interested in Managed/Other flag */
len = read(fd, &ra, sizeof(ra));
if ((size_t)len < sizeof(ra))
return 0;
if (ra.nd_ra_type != ND_ROUTER_ADVERT)
return 0;
if (ra.nd_ra_code != 0)
return 0;
nd->timeout = sd_event_source_unref(nd->timeout);
nd->state = ICMP6_ROUTER_ADVERTISMENT_LISTEN;
if (ra.nd_ra_flags_reserved & ND_RA_FLAG_OTHER )
event = ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER;
if (ra.nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)
event = ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED;
log_icmp6_nd(nd, "Received Router Advertisement flags %s/%s",
(ra.nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)? "MANAGED":
"none",
(ra.nd_ra_flags_reserved & ND_RA_FLAG_OTHER)? "OTHER":
"none");
icmp6_nd_notify(nd, event);
return 0;
}
