/** Release a Connection and all memory associated with it.
* The connection's DNS reply field is freed, its file descriptor is
* closed, its msgq and sendq are cleared, and its associated Listener
* is dereferenced. Then it is prepended to #connectionFreeList.
* @param[in] con Connection to free.
*/
static void dealloc_connection(struct Connection* con)
{
assert(con_verify(con));
assert(!t_active(&(con_proc(con))));
assert(!t_onqueue(&(con_proc(con))));
Debug((DEBUG_LIST, "Deallocating connection %p", con));
if (con_dns_reply(con))
--(con_dns_reply(con)->ref_count);
if (con_dnsbl_reply(con))
--(con_dnsbl_reply(con)->ref_count);
if (-1 < con_fd(con))
close(con_fd(con));
MsgQClear(&(con_sendQ(con)));
client_drop_sendq(con);
DBufClear(&(con_recvQ(con)));
if (con_listener(con))
release_listener(con_listener(con));
if (con_loc(con))
MyFree(con_loc(con));
--connections.inuse;
con_next(con) = connectionFreeList;
connectionFreeList = con;
con_magic(con) = 0;
}
/** Mark a client as dead, even if they are not the current message source.
* This is done by setting the DEADSOCKET flag on the user and letting the
* main loop perform the actual exit logic.
* @param[in,out] to Client being killed.
* @param[in] notice Message for local opers.
*/
static void dead_link(struct Client *to, char *notice)
{
SetFlag(to, FLAG_DEADSOCKET);
/*
* If because of BUFFERPOOL problem then clean dbuf's now so that
* notices don't hurt operators below.
*/
DBufClear(&(cli_recvQ(to)));
MsgQClear(&(cli_sendQ(to)));
client_drop_sendq(cli_connect(to));
/*
* Keep a copy of the last comment, for later use...
*/
ircd_strncpy(cli_info(to), notice, REALLEN);
if (!IsUser(to) && !IsUnknown(to) && !HasFlag(to, FLAG_CLOSING))
sendto_opmask_butone(0, SNO_OLDSNO, "%s for %s", cli_info(to), cli_name(to));
Debug((DEBUG_ERROR, cli_info(to)));
}
/** Attempt to send a sequence of bytes to the connection.
* As a side effect, updates \a cptr's FLAG_BLOCKED setting
* and sendB/sendK fields.
* @param cptr Client that should receive data.
* @param buf Message buffer to send to client.
* @return Negative on connection-fatal error; otherwise
* number of bytes sent.
*/
unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
{
unsigned int bytes_written = 0;
unsigned int bytes_count = 0;
assert(0 != cptr);
#if defined(USE_SSL)
switch (client_sendv(cptr, buf, &bytes_count, &bytes_written)) {
#else
switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
#endif
case IO_SUCCESS:
ClrFlag(cptr, FLAG_BLOCKED);
cli_sendB(cptr) += bytes_written;
cli_sendB(&me) += bytes_written;
/* A partial write implies that future writes will block. */
if (bytes_written < bytes_count)
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_BLOCKED:
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_FAILURE:
cli_error(cptr) = errno;
SetFlag(cptr, FLAG_DEADSOCKET);
break;
}
return bytes_written;
}
/** Complete non-blocking connect()-sequence. Check access and
* terminate connection, if trouble detected.
* @param cptr Client to which we have connected, with all ConfItem structs attached.
* @return Zero on failure (caller should exit_client()), non-zero on success.
*/
static int completed_connection(struct Client* cptr)
{
struct ConfItem *aconf;
time_t newts;
struct Client *acptr;
int i;
#if defined(USE_SSL)
char *sslfp;
int r;
#endif
assert(0 != cptr);
/*
* get the socket status from the fd first to check if
* connection actually succeeded
*/
if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
const char* msg = strerror(cli_error(cptr));
if (!msg)
msg = "Unknown error";
sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: %s",
cli_name(cptr), msg);
return 0;
}
if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
sendto_opmask(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
return 0;
}
#if defined(USE_SSL)
if (aconf->flags & CONF_SSL) {
r = ssl_connect(&(cli_socket(cptr)));
if (r == -1) {
sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: SSL error",
cli_name(cptr));
return 0;
} else if (r == 0)
return 1;
sslfp = ssl_get_fingerprint(cli_socket(cptr).s_ssl);
if (sslfp)
ircd_strncpy(cli_sslclifp(cptr), sslfp, BUFSIZE+1);
SetSSL(cptr);
}
#endif
if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
socket_state(&(cli_socket(cptr)), SS_CONNECTED);
if (!EmptyString(aconf->passwd))
sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
/*
* Create a unique timestamp
*/
newts = TStime();
for (i = HighestFd; i > -1; --i) {
if ((acptr = LocalClientArray[i]) &&
(IsServer(acptr) || IsHandshake(acptr))) {
if (cli_serv(acptr)->timestamp >= newts)
newts = cli_serv(acptr)->timestamp + 1;
}
}
assert(0 != cli_serv(cptr));
cli_serv(cptr)->timestamp = newts;
SetHandshake(cptr);
/*
* Make us timeout after twice the timeout for DNS look ups
*/
cli_lasttime(cptr) = CurrentTime;
ClearPingSent(cptr);
/* TODO: NEGOCIACION
envia_config_req(cptr);
*/
sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
cli_name(&me), cli_serv(&me)->timestamp, newts,
MAJOR_PROTOCOL, NumServCap(&me),
feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
#if defined(DDB)
ddb_burst(cptr);
#endif
return (IsDead(cptr)) ? 0 : 1;
}
/** Close the physical connection. Side effects: MyConnect(cptr)
* becomes false and cptr->from becomes NULL.
* @param cptr Client to disconnect.
*/
void close_connection(struct Client *cptr)
{
struct ConfItem* aconf;
if (IsServer(cptr)) {
ServerStats->is_sv++;
ServerStats->is_sbs += cli_sendB(cptr);
ServerStats->is_sbr += cli_receiveB(cptr);
ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
/*
* If the connection has been up for a long amount of time, schedule
* a 'quick' reconnect, else reset the next-connect cycle.
*/
if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
/*
* Reschedule a faster reconnect, if this was a automatically
* connected configuration entry. (Note that if we have had
* a rehash in between, the status has been changed to
* CONF_ILLEGAL). But only do this if it was a "good" link.
*/
aconf->hold = CurrentTime;
aconf->hold += ((aconf->hold - cli_since(cptr) >
feature_int(FEAT_HANGONGOODLINK)) ?
feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
/* if (nextconnect > aconf->hold) */
/* nextconnect = aconf->hold; */
}
}
else if (IsUser(cptr)) {
ServerStats->is_cl++;
ServerStats->is_cbs += cli_sendB(cptr);
ServerStats->is_cbr += cli_receiveB(cptr);
ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
}
else
ServerStats->is_ni++;
#if defined(USE_ZLIB)
/*
* Siempre es una conexion nuestra
*/
if (cli_connect(cptr)->zlib_negociation & ZLIB_IN) {
inflateEnd(cli_connect(cptr)->comp_in);
MyFree(cli_connect(cptr)->comp_in);
}
if (cli_connect(cptr)->zlib_negociation & ZLIB_OUT) {
deflateEnd(cli_connect(cptr)->comp_out);
MyFree(cli_connect(cptr)->comp_out);
}
#endif
if (-1 < cli_fd(cptr)) {
flush_connections(cptr);
LocalClientArray[cli_fd(cptr)] = 0;
close(cli_fd(cptr));
socket_del(&(cli_socket(cptr))); /* queue a socket delete */
cli_fd(cptr) = -1;
cli_freeflag(cptr) &= ~FREEFLAG_SOCKET;
}
SetFlag(cptr, FLAG_DEADSOCKET);
MsgQClear(&(cli_sendQ(cptr)));
client_drop_sendq(cli_connect(cptr));
DBufClear(&(cli_recvQ(cptr)));
memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
set_snomask(cptr, 0, SNO_SET);
det_confs_butmask(cptr, 0);
if (cli_listener(cptr)) {
release_listener(cli_listener(cptr));
cli_listener(cptr) = 0;
}
for ( ; HighestFd > 0; --HighestFd) {
if (LocalClientArray[HighestFd])
break;
}
}
/** Close all unregistered connections.
* @param source Oper who requested the close.
* @return Number of closed connections.
*/
int net_close_unregistered_connections(struct Client* source)
{
int i;
struct Client* cptr;
int count = 0;
assert(0 != source);
for (i = HighestFd; i > 0; --i) {
if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
exit_client(source, cptr, &me, "Oper Closing");
++count;
}
}
return count;
}
/** Close the physical connection. Side effects: MyConnect(cptr)
* becomes false and cptr->from becomes NULL.
* @param cptr Client to disconnect.
*/
void close_connection(struct Client *cptr)
{
struct ConfItem* aconf;
if (IsServer(cptr)) {
ServerStats->is_sv++;
ServerStats->is_sbs += cli_sendB(cptr);
ServerStats->is_sbr += cli_receiveB(cptr);
ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
/*
* If the connection has been up for a long amount of time, schedule
* a 'quick' reconnect, else reset the next-connect cycle.
*/
if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
/*
* Reschedule a faster reconnect, if this was a automatically
* connected configuration entry. (Note that if we have had
* a rehash in between, the status has been changed to
* CONF_ILLEGAL). But only do this if it was a "good" link.
*/
aconf->hold = CurrentTime;
aconf->hold += ((aconf->hold - cli_since(cptr) >
feature_int(FEAT_HANGONGOODLINK)) ?
feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
/* if (nextconnect > aconf->hold) */
/* nextconnect = aconf->hold; */
}
}
else if (IsUser(cptr)) {
ServerStats->is_cl++;
ServerStats->is_cbs += cli_sendB(cptr);
ServerStats->is_cbr += cli_receiveB(cptr);
ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
}
else
ServerStats->is_ni++;
if (-1 < cli_fd(cptr)) {
flush_connections(cptr);
LocalClientArray[cli_fd(cptr)] = 0;
close(cli_fd(cptr));
socket_del(&(cli_socket(cptr))); /* queue a socket delete */
cli_fd(cptr) = -1;
}
SetFlag(cptr, FLAG_DEADSOCKET);
MsgQClear(&(cli_sendQ(cptr)));
client_drop_sendq(cli_connect(cptr));
DBufClear(&(cli_recvQ(cptr)));
memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
set_snomask(cptr, 0, SNO_SET);
det_confs_butmask(cptr, 0);
if (cli_listener(cptr)) {
release_listener(cli_listener(cptr));
cli_listener(cptr) = 0;
}
for ( ; HighestFd > 0; --HighestFd) {
if (LocalClientArray[HighestFd])
break;
}
}