/** Send a uping to another server.
* @param[in] pptr Descriptor for uping.
*/
void uping_send(struct UPing* pptr)
{
struct timeval tv;
char buf[BUFSIZE + 1];
assert(0 != pptr);
if (pptr->sent == pptr->count)
return;
memset(buf, 0, sizeof(buf));
gettimeofday(&tv, NULL);
sprintf(buf, " %10lu%c%6lu", (unsigned long)tv.tv_sec, '\0', (unsigned long)tv.tv_usec);
Debug((DEBUG_SEND, "send_ping: sending [%s %s] to %s.%d on %d",
buf, &buf[12],
ircd_ntoa(&pptr->addr.addr), pptr->addr.port,
pptr->fd));
if (os_sendto_nonb(pptr->fd, buf, BUFSIZE, NULL, 0, &pptr->addr) != IO_SUCCESS)
{
const char* msg = strerror(errno);
if (!msg)
msg = "Unknown error";
if (pptr->client)
sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING: send failed: "
"%s", pptr->client, msg);
Debug((DEBUG_DEBUG, "UPING: send_ping: sendto failed on %d: %s", pptr->fd, msg));
uping_end(pptr);
return;
}
++pptr->sent;
}
/** Callback for uping listener socket.
* Reads a uping from the socket and respond, but not more than 10
* times per second.
* @param[in] ev I/O event for uping socket.
*/
static void uping_echo_callback(struct Event* ev)
{
struct Socket *sock;
struct irc_sockaddr from;
unsigned int len = 0;
static time_t last = 0;
static int counter = 0;
char buf[BUFSIZE + 1];
assert(ev_type(ev) == ET_READ || ev_type(ev) == ET_ERROR);
sock = ev_socket(ev);
assert(sock == &upingSock_v4 || sock == &upingSock_v6);
Debug((DEBUG_DEBUG, "UPING: uping_echo"));
if (IO_SUCCESS != os_recvfrom_nonb(s_fd(sock), buf, BUFSIZE, &len, &from))
return;
/*
* count em even if we're getting flooded so we can tell we're getting
* flooded.
*/
++ServerStats->uping_recv;
if (len < 19)
return;
else if (CurrentTime != last) {
counter = 0;
last = CurrentTime;
} else if (++counter > 10)
return;
os_sendto_nonb(s_fd(sock), buf, len, NULL, 0, &from);
}
/** Send a message to all of our nameservers.
* @param[in] msg Message to send.
* @param[in] len Length of message.
* @param[in] rcount Maximum number of servers to ask.
* @return Number of servers that were successfully asked.
*/
static int
send_res_msg(const char *msg, int len, int rcount)
{
int i;
int sent = 0;
int max_queries = IRCD_MIN(irc_nscount, rcount);
/* RES_PRIMARY option is not implemented
* if (res.options & RES_PRIMARY || 0 == max_queries)
*/
if (max_queries == 0)
max_queries = 1;
for (i = 0; i < max_queries; i++) {
int fd = irc_in_addr_is_ipv4(&irc_nsaddr_list[i].addr) ? s_fd(&res_socket_v4) : s_fd(&res_socket_v6);
if (os_sendto_nonb(fd, msg, len, NULL, 0, &irc_nsaddr_list[i]) == IO_SUCCESS)
++sent;
}
return(sent);
}
