--- deliantra/server/socket/lowlevel.C 2006/12/13 21:27:09 1.11 +++ deliantra/server/socket/lowlevel.C 2007/03/01 12:28:17 1.34 @@ -1,25 +1,26 @@ /* - CrossFire, A Multiplayer game for X-windows - - Copyright (C) 1992 Frank Tore Johansen - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - The author can be reached via e-mail to mark@pyramid.com -*/ - + * CrossFire, A Multiplayer game for X-windows + * + * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team + * Copyright (C) 1992 Frank Tore Johansen + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * The author can be reached via e-mail to mark@pyramid.com + */ + /** * \file * Low-level socket-related functions. @@ -35,7 +36,6 @@ using namespace std; #include -#include #include #include @@ -43,207 +43,356 @@ # include # include # include -# define TCP_HZ 1000 // sorry... # include #endif // use a really low timeout, as it doesn't cost any bandwidth, and you can // easily die in 20 seconds... -#define SOCKET_TIMEOUT1 10 -#define SOCKET_TIMEOUT2 20 +#define SOCKET_TIMEOUT1 10 * 1000 +#define SOCKET_TIMEOUT2 20 * 1000 void -Socket_Flush (NewSocket * ns) +client::flush () { + if (destroyed ()) + return; + #ifdef __linux__ // check time of last ack, and, if too old, kill connection struct tcp_info tcpi; socklen_t len = sizeof (tcpi); - if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) + if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) { unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; - if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s - && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s + rtt = tcpi.tcpi_rtt; + rttvar = tcpi.tcpi_rttvar; + + if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s + && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s { - LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, + LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); - ns->status = Ns_Dead; + destroy (); } } +#endif + + /** + * Writes data to socket. + * + * When the socket is clear to write, and we have backlogged data, this + * is called to write it out. + */ + + if (!outputbuffer.len || socket_ev.poll () & PE_W) + return; + + write_outputbuffer (); +} - int val; +void +client::write_outputbuffer () +{ + while (outputbuffer.len) + { + int res = write (fd, outputbuffer.data + outputbuffer.start, + min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); + + if (res > 0) + { + outputbuffer.start += res; + /* wrap back to start of buffer */ + if (outputbuffer.start == SOCKETBUFSIZE) + outputbuffer.start = 0; - val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); - val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); + outputbuffer.len -= res; +#ifdef CS_LOGSTATS + cst_tot.obytes += res; + cst_lst.obytes += res; #endif + } + else if (res == 0) + { + LOG (llevError, "socket write failed, connection closed.\n"); + destroy (); + return; + } + else if (errno == EINTR) + { + // just retry + } + else if (errno == EAGAIN) + { + // delay till ready + socket_ev.poll (socket_ev.poll () | PE_W); + socket_ev.start (); + return; + } + else + { + LOG (llevError, "socket write failed: %s\n", strerror (errno)); + destroy (); + return; + } + } + + socket_ev.poll (socket_ev.poll () & ~PE_W); } -/*********************************************************************** +/****************************************************************************** * - * SockList functions/utilities + * Start of read routines. * - **********************************************************************/ + ******************************************************************************/ -SockList &SockList::operator <<(const data &v) +int +client::next_packet () { - if (v.len) + if (inbuf_len >= 2) { - memcpy (buf + len, v.ptr, v.len); - len += v.len; - } + int pkt_len = (inbuf [0] << 8) | inbuf [1]; - return *this; -} + if (inbuf_len >= 2 + pkt_len) + return 2 + pkt_len; -SockList &SockList::operator <<(const data8 &v) -{ - unsigned int len = min (v.len, 0x00FF); - return *this << uint8 (len) << data (v.ptr, len); -} + if (inbuf_len == sizeof (inbuf)) + { + send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); + destroy (); + return -1; + } + } -SockList &SockList::operator <<(const data16 &v) -{ - unsigned int len = min (v.len, 0xFFFF); - return *this << uint16 (len) << data (v.ptr, len); + return 0; } -SockList &SockList::operator <<(const char *v) +void +client::skip_packet (int len) { - return *this << data (v, strlen (v ? v : 0)); + inbuf_len -= len; + memmove (inbuf, inbuf + len, inbuf_len); } -void -SockList::printf (const char *format, ...) -{ - va_list ap; - va_start (ap, format); +/***************************************************************************** + * Start of command dispatch area. + * The commands here are protocol commands. + ****************************************************************************/ - len += vsprintf ((char *)buf + len, format, ap); +// SocketCommand, PlayingCommand, should not exist with those ugly casts +#define SC(cb) (void *)static_cast(cb), +#define PC(cb) (void *)static_cast(cb), PF_PLAYER | - va_end (ap); +/** + * Dispatch table for the server. + */ +static struct packet_type packets[] = { + {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, + {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, + + {"examine", PC(ExamineCmd) PF_PLAYING }, + {"apply", PC(ApplyCmd) PF_PLAYING }, + {"lookat", PC(LookAt) PF_PLAYING }, + {"lock", PC(LockItem) PF_PLAYING }, + {"mark", PC(MarkItem) PF_PLAYING }, + {"move", PC(MoveCmd) PF_PLAYING }, + {"ext", PC(ExtCmd) 0 }, /* CF+ */ + {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ + {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ + + {"reply", SC(ReplyCmd) 0 }, + {"exti", SC(ExtiCmd) 0 }, /* CF+ */ + {"addme", SC(AddMeCmd) 0 }, + {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ + {"requestinfo", SC(RequestInfo) 0 }, + {"setfacemode", SC(SetFaceMode) 0 }, + {"setsound", SC(SetSound) 0 }, + {"setup", SC(SetUp) 0 }, + {"version", SC(VersionCmd) 0 }, + {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ + {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ + {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ +}; + +bool +client::may_execute (const packet_type *pkt) const +{ + return (!(pkt->flags & PF_PLAYER) || pl) + && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); +} + +// HACK: some commands currently should be executed +// even when the player is frozen. this hack detects +// those commands. it should be folded into may_execute, +// but kept seperate to emphasise the hack aspect, i.e. +// do it better, then remove. +static bool +always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) +{ + if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) + return false; + + if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) + return false; + + if (pkt->flags & PF_COMMAND6) + { + data += 6; + len -= 6; + } + + if (len > 4 && !strncmp (data, "say " , 4)) + return true; + if (len > 5 && !strncmp (data, "chat ", 5)) + return true; + + return false; } -/* Basically does the reverse of SockList_AddInt, but on - * strings instead. Same for the GetShort, but for 16 bits. - */ -int -GetInt_String (unsigned char *data) +void +client::execute (const packet_type *pkt, char *data, int datalen) { - return ((data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3]); + if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) + { + //TODO: only one format + if (pkt->flags & PF_PLAYER) + ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); + else + ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); + } + else + send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); } -short -GetShort_String (unsigned char *data) +bool +client::handle_packet () { - return ((data[0] << 8) + data[1]); -} + int pkt_len = next_packet (); -/****************************************************************************** - * - * Start of read routines. - * - ******************************************************************************/ + if (!pkt_len) + return false; + else if (pkt_len < 0) + { + LOG (llevError, "read error on player %s\n", + pl && pl->ob ? &pl->ob->name : "[anonymous]"); + destroy (); + return false; + } -/** - * This reads from fd and puts the data in sl. We return true if we think - * we have a full packet, 0 if we have a partial packet. The only processing - * we do is remove the intial size value. len (As passed) is the size of the - * buffer allocated in the socklist. We make the assumption the buffer is - * at least 2 bytes long. - */ + inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ -int -SockList_ReadPacket (int fd, SockList *sl, int len) -{ - int stat, toread; + /* First, break out beginning word. There are at least + * a few commands that do not have any paremeters. If + * we get such a command, don't worry about trying + * to break it up. + */ + int datalen; + char *data = strchr ((char *)inbuf + 2, ' '); - /* Sanity check - shouldn't happen */ - if (sl->len < 0) + if (data) { - abort (); + *data++ = 0; + datalen = pkt_len - (data - (char *)inbuf); } - /* We already have a partial packet */ - if (sl->len < 2) + else { - do - { - stat = read (fd, sl->buf + sl->len, 2 - sl->len); - } - while ((stat == -1) && (errno == EINTR)); + data = (char *)inbuf + 2; // better read garbage than segfault + datalen = 0; + } - if (stat < 0) - { - /* In non blocking mode, EAGAIN is set when there is no - * data available. - */ - if (errno != EAGAIN && errno != EWOULDBLOCK) - { - LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); - } - return 0; /*Error */ - } - if (stat == 0) - return -1; - sl->len += stat; -#ifdef CS_LOGSTATS - cst_tot.ibytes += stat; - cst_lst.ibytes += stat; -#endif - if (stat < 2) - return 0; /* Still don't have a full packet */ + for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) + if (!strcmp ((char *)inbuf + 2, pkt->name)) + { + if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) + queue_command (pkt, data, datalen); + else + execute (pkt, data, datalen); + + goto next_packet; + } + + // If we get here, we didn't find a valid command. + send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); +next_packet: + skip_packet (pkt_len); + + // input buffer has space again + socket_ev.poll (socket_ev.poll () | PE_R); + + return true; +} + +// callback called when socket is either readable or writable +void +client::socket_cb (iow &w, int got) +{ + //TODO remove when we have better socket cleanup logic + if (destroyed ()) + { + socket_ev.poll (0); + return; } - /* Figure out how much more data we need to read. Add 2 from the - * end of this - size header information is not included. - */ - toread = 2 + (sl->buf[0] << 8) + sl->buf[1] - sl->len; - if ((toread + sl->len) >= len) + + if (got & PE_W) { - LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len); - /* Quick hack in case for 'oldsocketmode' input. If we are - * closing the socket anyways, then reading this extra 100 bytes - * shouldn't hurt. - */ - read (fd, sl->buf + 2, 100); + write_outputbuffer (); - /* return error so the socket is closed */ - return -1; + if (!outputbuffer.len) + socket_ev.poll (socket_ev.poll () & ~PE_W); } - do + + if (got & PE_R) { - do + //TODO: rate-limit tcp connection in better ways, important + + int amount = sizeof (inbuf) - inbuf_len; + + if (!amount) { - stat = read (fd, sl->buf + sl->len, toread); + // input buffer full + socket_ev.poll (socket_ev.poll () & ~PE_R); + return; } - while ((stat < 0) && (errno == EINTR)); - if (stat < 0) - { - if (errno != EAGAIN && errno != EWOULDBLOCK) + amount = read (fd, inbuf + inbuf_len, amount); + + if (!amount) + { + destroy (); + return; + } + else if (amount < 0) + { + if (errno != EAGAIN && errno != EINTR) { - LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); + LOG (llevError, "read error: %s\n", strerror (errno)); + destroy (); + return; } - return 0; /*Error */ + + // should not be here, normally } - if (stat == 0) - return -1; - sl->len += stat; -#ifdef CS_LOGSTATS - cst_tot.ibytes += stat; - cst_lst.ibytes += stat; -#endif - toread -= stat; - if (toread == 0) - return 1; - if (toread < 0) + else { - LOG (llevError, "SockList_ReadPacket: Read more bytes than desired.\n"); - return 1; + inbuf_len += amount; + + cst_tot.ibytes += amount; + cst_lst.ibytes += amount; + + cmd_ev.start (); } } - while (toread > 0); - return 0; +} + +// called whenever we have additional commands to process +void +client::cmd_cb (iw &w) +{ + if (handle_packet ()) + w.start (); + else + flush (); } /******************************************************************************* @@ -258,24 +407,27 @@ * ns is the socket we are adding the data to, buf is the start of the * data, and len is the number of bytes to add. */ - -static void -add_to_buffer (NewSocket * ns, char *buf, int len) +void +client::send (void *buf_, int len) { - int avail, end; + char *buf = (char *)buf_; - if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) + if (destroyed () || !buf) + return; + + if (len + outputbuffer.len > SOCKETBUFSIZE) { - LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); - ns->status = Ns_Dead; + LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); + destroy (); return; } + int avail, end; + /* data + end is where we start putting the new data. The last byte * currently in use is actually data + end -1 */ - - end = ns->outputbuffer.start + ns->outputbuffer.len; + end = outputbuffer.start + outputbuffer.len; /* The buffer is already in a wrapped state, so adjust end */ if (end >= SOCKETBUFSIZE) end -= SOCKETBUFSIZE; @@ -284,205 +436,134 @@ /* We can all fit it behind the current data without wrapping */ if (avail >= len) - memcpy (ns->outputbuffer.data + end, buf, len); + memcpy (outputbuffer.data + end, buf, len); else { - memcpy (ns->outputbuffer.data + end, buf, avail); - memcpy (ns->outputbuffer.data, buf + avail, len - avail); + memcpy (outputbuffer.data + end, buf, avail); + memcpy (outputbuffer.data, buf + avail, len - avail); } - ns->outputbuffer.len += len; -#if 0 - LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); -#endif + outputbuffer.len += len; } /** - * Writes data to socket. - * - * When the socket is clear to write, and we have backlogged data, this - * is called to write it out. + * Takes a string of data, and writes it out to the socket. A very handy + * shortcut function. */ void -write_socket_buffer (NewSocket * ns) +client::send_packet (packet &sl) { - int amt, max; + if (destroyed ()) + return; - if (ns->outputbuffer.len == 0) + if (sl.length () >= MAXSOCKBUF) { - LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); - return; + LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); + /* Almost certainly we've overflowed a buffer, so quit now to make + * it easier to debug. + */ + abort (); } - do - { - max = SOCKETBUFSIZE - ns->outputbuffer.start; - if (ns->outputbuffer.len < max) - max = ns->outputbuffer.len; + if (!sl.length ()) + return; - do - { - amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); - } - while ((amt < 0) && (errno == EINTR)); + assert (sl.hdrlen == 2); - if (amt < 0) - { /* We got an error */ + sl.buf_ [0] = sl.length () >> 8; + sl.buf_ [1] = sl.length () ; - if (errno != EWOULDBLOCK) - { - LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); - ns->status = Ns_Dead; - return; - } - else - { /* EWOULDBLOCK */ - /* can't write it, so store it away. */ - ns->can_write = 0; - return; - } - } - ns->outputbuffer.start += amt; - /* wrap back to start of buffer */ - if (ns->outputbuffer.start == SOCKETBUFSIZE) - ns->outputbuffer.start = 0; - ns->outputbuffer.len -= amt; -#ifdef CS_LOGSTATS - cst_tot.obytes += amt; - cst_lst.obytes += amt; -#endif - } - while (ns->outputbuffer.len > 0); + send (sl.buf_, sl.length () + sl.hdrlen); } -/** - * This writes data to the socket. - It is very low level - - * all we try and do is write out the data to the socket - * provided (ns). buf is the data to write, len is the number - * of bytes to write. IT doesn't return anything - rather, it - * updates the ns structure if we get an error. - */ void -Write_To_Socket (NewSocket * ns, char *buf, int len) +client::send_packet (const char *buf, int len) { - int amt = 0; - char *pos = buf; - - if (ns->status == Ns_Dead || !buf) - { - LOG (llevDebug, "Write_To_Socket called with dead socket\n"); - return; - } + packet sl; -#ifndef __GNU__ /* This caused problems on Hurd */ - if (!ns->can_write) - { - add_to_buffer (ns, buf, len); - return; - } -#endif - /* If we manage to write more than we wanted, take it as a bonus */ - while (len > 0) - { - - do - { - amt = write (ns->fd, pos, len); - } - while ((amt < 0) && (errno == EINTR)); - - if (amt < 0) - { /* We got an error */ - if (errno != EWOULDBLOCK) - { - LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ - errno, strerror (errno)); - ns->status = Ns_Dead; - return; - } - else - { /* EWOULDBLOCK */ - /* can't write it, so store it away. */ - add_to_buffer (ns, pos, len); - ns->can_write = 0; - return; - } - } - /* amt gets set to 0 above in blocking code, so we do this as - * an else if to make sure we don't reprocess it. - */ - else if (amt == 0) - { - LOG (llevError, "Write_To_Socket: No data written out.\n"); - } - len -= amt; - pos += amt; -#ifdef CS_LOGSTATS - cst_tot.obytes += amt; - cst_lst.obytes += amt; -#endif - } + sl << data (buf, len); + send_packet (sl); } +void +client::send_packet (const char *buf) +{ + send_packet (buf, strlen (buf)); +} -/** - * Takes a string of data, and writes it out to the socket. A very handy - * shortcut function. - */ void -cs_write_string (NewSocket *ns, const char *buf, int len) +client::send_packet_printf (const char *format, ...) { - SockList sl; + packet sl; - sl.len = len; - sl.buf = (unsigned char *) buf; - Send_With_Handling (ns, &sl); -} + va_list ap; + va_start (ap, format); + sl.vprintf (format, ap); + va_end (ap); + send_packet (sl); +} -/** - * Calls Write_To_Socket to send data to the client. +/*********************************************************************** * - * The only difference in this function is that we take a SockList - *, and we prepend the length information. - */ -void -Send_With_Handling (NewSocket *ns, SockList *msg) + * packet functions/utilities + * + **********************************************************************/ + +packet::packet (const char *name) { - unsigned char sbuf[4]; + reset (); - if (ns->status == Ns_Dead || !msg) - return; + int len = strlen (name); + memcpy (cur, name, len); cur += len; + *cur++ = ' '; +} - if (msg->len >= MAXSOCKBUF) +packet &packet::operator <<(const data &v) +{ + if (room () < v.len) + reset (); + else { - LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); - /* Almost certainly we've overflowed a buffer, so quite now to make - * it easier to debug. - */ - abort (); + if (v.len) + { + memcpy (cur, v.ptr, v.len); + cur += v.len; + } } - sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; - sbuf[1] = ((uint32) (msg->len)) & 0xFF; - if (ns->status != Ns_Old) - Write_To_Socket (ns, (char *) sbuf, 2); - Write_To_Socket (ns, (char *) msg->buf, msg->len); + + return *this; } -/** - * Takes a string of data, and writes it out to the socket. A very handy - * shortcut function. - */ -void -Write_String_To_Socket (NewSocket *ns, char *buf, int len) +packet &packet::operator <<(const data8 &v) { - SockList sl; + unsigned int len = min (v.len, 0x00FF); + return *this << uint8 (len) << data (v.ptr, len); +} - sl.len = len; - sl.buf = (unsigned char *) buf; - Send_With_Handling (ns, &sl); +packet &packet::operator <<(const data16 &v) +{ + unsigned int len = min (v.len, 0xFFFF); + return *this << uint16 (len) << data (v.ptr, len); +} + +packet &packet::operator <<(const char *v) +{ + return *this << data (v, strlen (v ? v : 0)); } +void +packet::vprintf (const char *format, va_list ap) +{ + int size = room (); + + int len = vsnprintf ((char *)cur, size, format, ap); + + if (len >= size) + return reset (); + + cur += len; +} /****************************************************************************** * @@ -515,7 +596,6 @@ now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); cst_lst.ibytes = 0; cst_lst.obytes = 0; - cst_lst.max_conn = socket_info.nconns; cst_lst.time_start = now; } #endif