/** Handle a SERVER message from another server. * * \a parv has the following elements: * \li \a parv[1] is the server name * \li \a parv[2] is the hop count to the server * \li \a parv[3] is the start timestamp for the server * \li \a parv[4] is the link timestamp * \li \a parv[5] is the protocol version (P10 or J10) * \li \a parv[6] is the numnick mask for the server * \li \a parv[7] is a string of flags like +hs to mark hubs and services * \li \a parv[\a parc - 1] is the server description * * See @ref m_functions for discussion of the arguments. * @param[in] cptr Client that sent us the message. * @param[in] sptr Original source of message. * @param[in] parc Number of arguments. * @param[in] parv Argument vector. */ int ms_server(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) { int i; char* host; struct Client* acptr; struct Client* bcptr; int hop; int ret; unsigned short prot; time_t start_timestamp; time_t timestamp; if (parc < 8) { return need_more_params(sptr, "SERVER"); return exit_client(cptr, cptr, &me, "Need more parameters"); } host = clean_servername(parv[1]); if (!host) { sendto_opmask(0, SNO_OLDSNO, "Bogus server name (%s) from %s", host, cli_name(cptr)); return exit_client_msg(cptr, cptr, &me, "Bogus server name (%s)", host); } /* * Detect protocol */ hop = atoi(parv[2]); start_timestamp = atoi(parv[3]); timestamp = atoi(parv[4]); prot = parse_protocol(parv[5]); if (!prot) return exit_client_msg(cptr, sptr, &me, "Bogus protocol (%s)", parv[5]); else if (prot < atoi(MINOR_PROTOCOL)) return exit_new_server(cptr, sptr, host, timestamp, "Incompatible protocol: %s", parv[5]); Debug((DEBUG_INFO, "Got SERVER %s with timestamp [%s] age %Tu (%Tu)", host, parv[4], start_timestamp, cli_serv(&me)->timestamp)); if (timestamp < OLDEST_TS) return exit_client_msg(cptr, sptr, &me, "Bogus timestamps (%s %s)", parv[3], parv[4]); if (parv[parc - 1][0] == '\0') return exit_client_msg(cptr, cptr, &me, "No server info specified for %s", host); ret = check_loop_and_lh(cptr, sptr, NULL, host, (parc > 7 ? parv[6] : NULL), timestamp, hop, parv[5][0] == 'J'); if (ret != 1) return ret; /* * Server is informing about a new server behind * this link. Create REMOTE server structure, * add it to list and propagate word to my other * server links... */ acptr = make_client(cptr, STAT_SERVER); make_server(acptr); cli_serv(acptr)->prot = prot; cli_serv(acptr)->timestamp = timestamp; cli_hopcount(acptr) = hop; ircd_strncpy(cli_name(acptr), host, HOSTLEN); ircd_strncpy(cli_info(acptr), parv[parc-1], REALLEN); cli_serv(acptr)->up = sptr; cli_serv(acptr)->updown = add_dlink(&(cli_serv(sptr))->down, acptr); /* Use cptr, because we do protocol 9 -> 10 translation for numeric nicks ! */ SetServerYXX(cptr, acptr, parv[6]); update_uworld_flags(cptr); if (*parv[7] == '+') set_server_flags(acptr, parv[7] + 1); Count_newremoteserver(UserStats); add_client_to_list(acptr); hAddClient(acptr); if (*parv[5] == 'J') { SetBurst(acptr); SetJunction(acptr); for (bcptr = cli_serv(acptr)->up; !IsMe(bcptr); bcptr = cli_serv(bcptr)->up) if (IsBurstOrBurstAck(bcptr)) break; if (IsMe(bcptr)) sendto_opmask(0, SNO_NETWORK, "Net junction: %s %s", cli_name(sptr), cli_name(acptr)); } /* * Old sendto_serv_but_one() call removed because we now need to send * different names to different servers (domain name matching). */ for (i = 0; i <= HighestFd; i++) { if (!(bcptr = LocalClientArray[i]) || !IsServer(bcptr) || bcptr == cptr || IsMe(bcptr)) continue; if (0 == match(cli_name(&me), cli_name(acptr))) continue; sendcmdto_one(sptr, CMD_SERVER, bcptr, "%s %d 0 %s %s %s%s +%s%s%s :%s", cli_name(acptr), hop + 1, parv[4], parv[5], NumServCap(acptr), IsHub(acptr) ? "h" : "", IsService(acptr) ? "s" : "", IsIPv6(acptr) ? "6" : "", cli_info(acptr)); } return 0; }
/** Handle a connection that has sent a valid PASS and SERVER. * @param cptr New peer server. * @param aconf Connect block for \a cptr. * @return Zero. */ int server_estab(struct Client *cptr, struct ConfItem *aconf) { struct Client* acptr = 0; const char* inpath; int i; assert(0 != cptr); assert(0 != cli_local(cptr)); inpath = cli_name(cptr); if (IsUnknown(cptr)) { if (aconf->passwd[0]) sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd); /* * Pass my info to the new server */ sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s", cli_name(&me), cli_serv(&me)->timestamp, cli_serv(cptr)->timestamp, MAJOR_PROTOCOL, NumServCap(&me), feature_bool(FEAT_HUB) ? "h" : "", *(cli_info(&me)) ? cli_info(&me) : "IRCers United"); } det_confs_butmask(cptr, CONF_SERVER); if (!IsHandshake(cptr)) hAddClient(cptr); SetServer(cptr); cli_handler(cptr) = SERVER_HANDLER; Count_unknownbecomesserver(UserStats); SetBurst(cptr); /* nextping = CurrentTime; */ /* * NOTE: check for acptr->user == cptr->serv->user is necessary to insure * that we got the same one... bleah */ if (cli_serv(cptr)->user && *(cli_serv(cptr))->by && (acptr = findNUser(cli_serv(cptr)->by))) { if (cli_user(acptr) == cli_serv(cptr)->user) { sendcmdto_one(&me, CMD_NOTICE, acptr, "%C :Link with %s established.", acptr, inpath); } else { /* * if not the same client, set by to empty string */ acptr = 0; *(cli_serv(cptr))->by = '\0'; } } sendto_opmask(acptr, SNO_OLDSNO, "Link with %s established.", inpath); cli_serv(cptr)->up = &me; cli_serv(cptr)->updown = add_dlink(&(cli_serv(&me))->down, cptr); sendto_opmask(0, SNO_NETWORK, "Net junction: %s %s", cli_name(&me), cli_name(cptr)); SetJunction(cptr); /* * Old sendto_serv_but_one() call removed because we now * need to send different names to different servers * (domain name matching) Send new server to other servers. */ for (i = 0; i <= HighestFd; i++) { if (!(acptr = LocalClientArray[i]) || !IsServer(acptr) || acptr == cptr || IsMe(acptr)) continue; if (!match(cli_name(&me), cli_name(cptr))) continue; sendcmdto_one(&me, CMD_SERVER, acptr, "%s 2 0 %Tu J%02u %s%s +%s%s%s :%s", cli_name(cptr), cli_serv(cptr)->timestamp, Protocol(cptr), NumServCap(cptr), IsHub(cptr) ? "h" : "", IsService(cptr) ? "s" : "", IsIPv6(cptr) ? "6" : "", cli_info(cptr)); } /* Send these as early as possible so that glined users/juped servers can * be removed from the network while the remote server is still chewing * our burst. */ gline_burst(cptr); jupe_burst(cptr); /* * Pass on my client information to the new server * * First, pass only servers (idea is that if the link gets * canceled because the server was already there, * there are no NICK's to be canceled...). Of course, * if cancellation occurs, all this info is sent anyway, * and I guess the link dies when a read is attempted...? --msa * * Note: Link cancellation to occur at this point means * that at least two servers from my fragment are building * up connection this other fragment at the same time, it's * a race condition, not the normal way of operation... */ for (acptr = &me; acptr; acptr = cli_prev(acptr)) { /* acptr->from == acptr for acptr == cptr */ if (cli_from(acptr) == cptr) continue; if (IsServer(acptr)) { const char* protocol_str; if (Protocol(acptr) > 9) protocol_str = IsBurst(acptr) ? "J" : "P"; else protocol_str = IsBurst(acptr) ? "J0" : "P0"; if (0 == match(cli_name(&me), cli_name(acptr))) continue; sendcmdto_one(cli_serv(acptr)->up, CMD_SERVER, cptr, "%s %d 0 %Tu %s%u %s%s +%s%s%s :%s", cli_name(acptr), cli_hopcount(acptr) + 1, cli_serv(acptr)->timestamp, protocol_str, Protocol(acptr), NumServCap(acptr), IsHub(acptr) ? "h" : "", IsService(acptr) ? "s" : "", IsIPv6(acptr) ? "6" : "", cli_info(acptr)); } } for (acptr = &me; acptr; acptr = cli_prev(acptr)) { /* acptr->from == acptr for acptr == cptr */ if (cli_from(acptr) == cptr) continue; if (IsUser(acptr)) { char xxx_buf[25]; char *s = umode_str(acptr); sendcmdto_one(cli_user(acptr)->server, CMD_NICK, cptr, "%s %d %Tu %s %s %s%s%s%s %s%s :%s", cli_name(acptr), cli_hopcount(acptr) + 1, cli_lastnick(acptr), cli_user(acptr)->username, cli_user(acptr)->realhost, *s ? "+" : "", s, *s ? " " : "", iptobase64(xxx_buf, &cli_ip(acptr), sizeof(xxx_buf), IsIPv6(cptr)), NumNick(acptr), cli_info(acptr)); } } /* * Last, send the BURST. * (Or for 2.9 servers: pass all channels plus statuses) */ { struct Channel *chptr; for (chptr = GlobalChannelList; chptr; chptr = chptr->next) send_channel_modes(cptr, chptr); } sendcmdto_one(&me, CMD_END_OF_BURST, cptr, ""); return 0; }
/** Read a 'packet' of data from a connection and process it. Read in * 8k chunks to give a better performance rating (for server * connections). Do some tricky stuff for client connections to make * sure they don't do any flooding >:-) -avalon * @param cptr Client from which to read data. * @param socket_ready If non-zero, more data can be read from the client's socket. * @return Positive number on success, zero on connection-fatal failure, negative * if user is killed. */ static int read_packet(struct Client *cptr, int socket_ready) { unsigned int dolen = 0; unsigned int length = 0; if (socket_ready && !(IsUser(cptr) && DBufLength(&(cli_recvQ(cptr))) > feature_uint(FEAT_CLIENT_FLOOD))) { #if defined(USE_SSL) switch (client_recv(cptr, readbuf, sizeof(readbuf), &length)) { #else switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) { #endif case IO_SUCCESS: if (length) { cli_lasttime(cptr) = CurrentTime; ClearPingSent(cptr); ClrFlag(cptr, FLAG_NONL); if (cli_lasttime(cptr) > cli_since(cptr)) cli_since(cptr) = cli_lasttime(cptr); } break; case IO_BLOCKED: break; case IO_FAILURE: cli_error(cptr) = errno; /* SetFlag(cptr, FLAG_DEADSOCKET); */ return 0; } } /* * For server connections, we process as many as we can without * worrying about the time of day or anything :) */ if (length > 0 && IsServer(cptr)) return server_dopacket(cptr, readbuf, length); else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr))) return connect_dopacket(cptr, readbuf, length); else { /* * Before we even think of parsing what we just read, stick * it on the end of the receive queue and do it when its * turn comes around. */ if (length > 0 && dbuf_put(cptr, &(cli_recvQ(cptr)), readbuf, length) == 0) return exit_client(cptr, cptr, &me, "dbuf_put fail"); if ((DBufLength(&(cli_recvQ(cptr))) > feature_uint(FEAT_CLIENT_FLOOD)) && !IsChannelService(cptr)) return exit_client(cptr, cptr, &me, "Excess Flood"); while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) && (IsTrusted(cptr) || IsChannelService(cptr) || cli_since(cptr) - CurrentTime < 10)) { dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE); /* * Devious looking...whats it do ? well..if a client * sends a *long* message without any CR or LF, then * dbuf_getmsg fails and we pull it out using this * loop which just gets the next 512 bytes and then * deletes the rest of the buffer contents. * -avalon */ if (dolen == 0) { if (DBufLength(&(cli_recvQ(cptr))) < 510) SetFlag(cptr, FLAG_NONL); else { /* More than 512 bytes in the line - drop the input and yell * at the client. */ DBufClear(&(cli_recvQ(cptr))); send_reply(cptr, ERR_INPUTTOOLONG); } } else if (client_dopacket(cptr, dolen) == CPTR_KILLED) return CPTR_KILLED; /* * If it has become registered as a Server * then skip the per-message parsing below. */ if (IsHandshake(cptr) || IsServer(cptr)) { while (-1) { dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf)); if (dolen <= 0) return 1; else if (dolen == 0) { if (DBufLength(&(cli_recvQ(cptr))) < 510) SetFlag(cptr, FLAG_NONL); else { DBufClear(&(cli_recvQ(cptr))); /* send_reply(cptr, ERR_INPUTTOOLONG); */ } } else if ((IsServer(cptr) && server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) || (!IsServer(cptr) && connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED)) return CPTR_KILLED; } } } /* If there's still data to process, wait 2 seconds first */ if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) && !t_onqueue(&(cli_proc(cptr)))) { Debug((DEBUG_LIST, "Adding client process timer for %C", cptr)); cli_freeflag(cptr) |= FREEFLAG_TIMER; timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr), TT_RELATIVE, 2); } } return 1; } /** Start a connection to another server. * @param aconf Connect block data for target server. * @param by Client who requested the connection (if any). * @return Non-zero on success; zero on failure. */ int connect_server(struct ConfItem* aconf, struct Client* by) { struct Client* cptr = 0; assert(0 != aconf); if (aconf->dns_pending) { sendto_opmask(0, SNO_OLDSNO, "Server %s connect DNS pending", aconf->name); return 0; } Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name, ircd_ntoa(&aconf->address.addr))); if ((cptr = FindClient(aconf->name))) { if (IsServer(cptr) || IsMe(cptr)) { sendto_opmask(0, SNO_OLDSNO, "Server %s already present from %s", aconf->name, cli_name(cli_from(cptr))); if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present " "from %s", by, aconf->name, cli_name(cli_from(cptr))); } return 0; } else if (IsHandshake(cptr) || IsConnecting(cptr)) { if (by && IsUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in " "progress", by, cli_name(cptr)); } return 0; } } /* * If we don't know the IP# for this host and it is a hostname and * not a ip# string, then try and find the appropriate host record. */ if (!irc_in_addr_valid(&aconf->address.addr) && !ircd_aton(&aconf->address.addr, aconf->host)) { char buf[HOSTLEN + 1]; host_from_uh(buf, aconf->host, HOSTLEN); gethost_byname(buf, connect_dns_callback, aconf); aconf->dns_pending = 1; return 0; } cptr = make_client(NULL, STAT_UNKNOWN_SERVER); /* * Copy these in so we have something for error detection. */ ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN); ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN); /* * Attach config entries to client here rather than in * completed_connection. This to avoid null pointer references */ attach_confs_byhost(cptr, aconf->host, CONF_SERVER); if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) { sendto_opmask(0, SNO_OLDSNO, "Host %s is not enabled for " "connecting: no Connect block", aconf->name); if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no " "Connect block", by, aconf->name); } det_confs_butmask(cptr, 0); free_client(cptr); return 0; } /* * attempt to connect to the server in the conf line */ if (!connect_inet(aconf, cptr)) { if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by, cli_name(cptr)); } det_confs_butmask(cptr, 0); free_client(cptr); return 0; } /* * NOTE: if we're here we have a valid C:Line and the client should * have started the connection and stored the remote address/port and * ip address name in itself * * The socket has been connected or connect is in progress. */ make_server(cptr); if (by && IsUser(by)) { ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s", NumNick(by)); assert(0 == cli_serv(cptr)->user); cli_serv(cptr)->user = cli_user(by); cli_user(by)->refcnt++; } else { *(cli_serv(cptr))->by = '\0'; /* strcpy(cptr->serv->by, "Auto"); */ } cli_serv(cptr)->up = &me; SetConnecting(cptr); if (cli_fd(cptr) > HighestFd) HighestFd = cli_fd(cptr); LocalClientArray[cli_fd(cptr)] = cptr; Count_newunknown(UserStats); /* Actually we lie, the connect hasn't succeeded yet, but we have a valid * cptr, so we register it now. * Maybe these two calls should be merged. */ add_client_to_list(cptr); hAddClient(cptr); /* nextping = CurrentTime; */ return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ? completed_connection(cptr) : 1; } /** Find the real hostname for the host running the server (or one which * matches the server's name) and its primary IP#. Hostname is stored * in the client structure passed as a pointer. */ void init_server_identity(void) { const struct LocalConf* conf = conf_get_local(); assert(0 != conf); ircd_strncpy(cli_name(&me), conf->name, HOSTLEN); SetYXXServerName(&me, conf->numeric); } /** Process events on a client socket. * @param ev Socket event structure that has a struct Connection as * its associated data. */ static void client_sock_callback(struct Event* ev) { struct Client* cptr; struct Connection* con; char *fmt = "%s"; char *fallback = 0; assert(0 != ev_socket(ev)); assert(0 != s_data(ev_socket(ev))); con = (struct Connection*) s_data(ev_socket(ev)); assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY); cptr = con_client(con); assert(0 == cptr || con == cli_connect(cptr)); switch (ev_type(ev)) { case ET_DESTROY: con_freeflag(con) &= ~FREEFLAG_SOCKET; if (!con_freeflag(con) && !cptr) free_connection(con); #if defined(USE_SSL) ssl_free(ev_socket(ev)); #endif break; case ET_CONNECT: /* socket connection completed */ if (!completed_connection(cptr) || IsDead(cptr)) fallback = cli_info(cptr); break; case ET_ERROR: /* an error occurred */ fallback = cli_info(cptr); cli_error(cptr) = ev_data(ev); /* If the OS told us we have a bad file descriptor, we should * record that for future reference. */ if (cli_error(cptr) == EBADF) cli_fd(cptr) = -1; if (s_state(&(con_socket(con))) == SS_CONNECTING) { completed_connection(cptr); /* for some reason, the os_get_sockerr() in completed_connection() * can return 0 even when ev_data(ev) indicates a real error, so * re-assign the client error here. */ cli_error(cptr) = ev_data(ev); break; } /*FALLTHROUGH*/ case ET_EOF: /* end of file on socket */ Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr), cli_error(cptr))); SetFlag(cptr, FLAG_DEADSOCKET); if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) { exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)", cli_name(cptr), cli_serv(cptr)->last_error_msg); return; } else { fmt = "Read error: %s"; fallback = "EOF from client"; } break; case ET_WRITE: /* socket is writable */ ClrFlag(cptr, FLAG_BLOCKED); if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048) list_next_channels(cptr); Debug((DEBUG_SEND, "Sending queued data to %C", cptr)); send_queued(cptr); break; case ET_READ: /* socket is readable */ if (!IsDead(cptr)) { Debug((DEBUG_DEBUG, "Reading data from %C", cptr)); if (read_packet(cptr, 1) == 0) /* error while reading packet */ fallback = "EOF from client"; } break; default: assert(0 && "Unrecognized socket event in client_sock_callback()"); break; } assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr)); if (fallback) { const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback; if (!msg) msg = "Unknown error"; exit_client_msg(cptr, cptr, &me, fmt, msg); } } /** Process a timer on client socket. * @param ev Timer event that has a struct Connection as its * associated data. */ static void client_timer_callback(struct Event* ev) { struct Client* cptr; struct Connection* con; assert(0 != ev_timer(ev)); assert(0 != t_data(ev_timer(ev))); assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev)); con = (struct Connection*) t_data(ev_timer(ev)); assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY); cptr = con_client(con); assert(0 == cptr || con == cli_connect(cptr)); if (ev_type(ev)== ET_DESTROY) { con_freeflag(con) &= ~FREEFLAG_TIMER; /* timer has expired... */ if (!con_freeflag(con) && !cptr) free_connection(con); /* client is being destroyed */ } else { Debug((DEBUG_LIST, "Client process timer for %C expired; processing", cptr)); read_packet(cptr, 0); /* read_packet will re-add timer if needed */ } assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr)); }
/** Run the daemon. * @param[in] argc Number of arguments in \a argv. * @param[in] argv Arguments to program execution. */ int main(int argc, char **argv) { CurrentTime = time(NULL); thisServer.argc = argc; thisServer.argv = argv; thisServer.uid = getuid(); thisServer.euid = geteuid(); #ifdef MDEBUG mem_dbg_initialise(); #endif #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE) set_core_limit(); #endif umask(077); /* better safe than sorry --SRB */ memset(&me, 0, sizeof(me)); memset(&me_con, 0, sizeof(me_con)); cli_connect(&me) = &me_con; cli_fd(&me) = -1; parse_command_line(argc, argv); if (chdir(dpath)) { fprintf(stderr, "Fail: Cannot chdir(%s): %s, check DPATH\n", dpath, strerror(errno)); return 2; } if (!set_userid_if_needed()) return 3; /* Check paths for accessibility */ if (!check_file_access(SPATH, 'S', X_OK) || !check_file_access(configfile, 'C', R_OK)) return 4; if (!init_connection_limits()) return 9; close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY | BOOT_CHKCONF))); /* daemon_init() must be before event_init() because kqueue() FDs * are, perversely, not inherited across fork(). */ daemon_init(thisServer.bootopt & BOOT_TTY); #ifdef DEBUGMODE /* Must reserve fd 2... */ if (debuglevel >= 0 && !(thisServer.bootopt & BOOT_TTY)) { int fd; if ((fd = open("/dev/null", O_WRONLY)) < 0) { fprintf(stderr, "Unable to open /dev/null (to reserve fd 2): %s\n", strerror(errno)); return 8; } if (fd != 2 && dup2(fd, 2) < 0) { fprintf(stderr, "Unable to reserve fd 2; dup2 said: %s\n", strerror(errno)); return 8; } } #endif event_init(MAXCONNECTIONS); setup_signals(); feature_init(); /* initialize features... */ log_init(*argv); set_nomem_handler(outofmemory); initload(); init_list(); init_hash(); init_class(); initwhowas(); initmsgtree(); initstats(); /* we need this for now, when we're modular this should be removed -- hikari */ ircd_crypt_init(); motd_init(); if (!init_conf()) { log_write(LS_SYSTEM, L_CRIT, 0, "Failed to read configuration file %s", configfile); return 7; } if (thisServer.bootopt & BOOT_CHKCONF) { if (dbg_client) conf_debug_iline(dbg_client); fprintf(stderr, "Configuration file %s checked okay.\n", configfile); return 0; } debug_init(thisServer.bootopt & BOOT_TTY); if (check_pid()) { Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork")); exit(2); } init_server_identity(); uping_init(); stats_init(); IPcheck_init(); timer_add(timer_init(&connect_timer), try_connections, 0, TT_RELATIVE, 1); timer_add(timer_init(&ping_timer), check_pings, 0, TT_RELATIVE, 1); timer_add(timer_init(&destruct_event_timer), exec_expired_destruct_events, 0, TT_PERIODIC, 60); timer_add(timer_init(&mute_timer), check_expired_mutes, 0, TT_PERIODIC, 30); CurrentTime = time(NULL); SetMe(&me); cli_magic(&me) = CLIENT_MAGIC; cli_from(&me) = &me; make_server(&me); cli_serv(&me)->timestamp = TStime(); /* Abuse own link timestamp as start TS */ cli_serv(&me)->prot = atoi(MAJOR_PROTOCOL); cli_serv(&me)->up = &me; cli_serv(&me)->down = NULL; cli_handler(&me) = SERVER_HANDLER; SetYXXCapacity(&me, MAXCLIENTS); cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime; hAddClient(&me); write_pidfile(); init_counters(); Debug((DEBUG_NOTICE, "Server ready...")); log_write(LS_SYSTEM, L_NOTICE, 0, "Server Ready"); event_loop(); return 0; }
/** Start a connection to another server. * @param aconf Connect block data for target server. * @param by Client who requested the connection (if any). * @return Non-zero on success; zero on failure. */ int connect_server(struct ConfItem* aconf, struct Client* by) { struct Client* cptr = 0; assert(0 != aconf); if (aconf->dns_pending) { sendto_opmask_butone(0, SNO_OLDSNO, "Server %s connect DNS pending", aconf->name); return 0; } Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name, ircd_ntoa(&aconf->address.addr))); if ((cptr = FindClient(aconf->name))) { if (IsServer(cptr) || IsMe(cptr)) { sendto_opmask_butone(0, SNO_OLDSNO, "Server %s already present from %s", aconf->name, cli_name(cli_from(cptr))); if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present " "from %s", by, aconf->name, cli_name(cli_from(cptr))); } return 0; } else if (IsHandshake(cptr) || IsConnecting(cptr)) { if (by && IsUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in " "progress", by, cli_name(cptr)); } return 0; } } /* * If we don't know the IP# for this host and it is a hostname and * not a ip# string, then try and find the appropriate host record. */ if (!irc_in_addr_valid(&aconf->address.addr) && !ircd_aton(&aconf->address.addr, aconf->host)) { char buf[HOSTLEN + 1]; host_from_uh(buf, aconf->host, HOSTLEN); gethost_byname(buf, connect_dns_callback, aconf); aconf->dns_pending = 1; return 0; } cptr = make_client(NULL, STAT_UNKNOWN_SERVER); /* * Copy these in so we have something for error detection. */ ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN); ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN); /* * Attach config entries to client here rather than in * completed_connection. This to avoid null pointer references */ attach_confs_byhost(cptr, aconf->host, CONF_SERVER); if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) { sendto_opmask_butone(0, SNO_OLDSNO, "Host %s is not enabled for " "connecting: no Connect block", aconf->name); if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no " "Connect block", by, aconf->name); } det_confs_butmask(cptr, 0); free_client(cptr); return 0; } /* * attempt to connect to the server in the conf line */ if (!connect_inet(aconf, cptr)) { if (by && IsUser(by) && !MyUser(by)) { sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by, cli_name(cptr)); } det_confs_butmask(cptr, 0); free_client(cptr); return 0; } /* * NOTE: if we're here we have a valid C:Line and the client should * have started the connection and stored the remote address/port and * ip address name in itself * * The socket has been connected or connect is in progress. */ make_server(cptr); if (by && IsUser(by)) { ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s", NumNick(by)); assert(0 == cli_serv(cptr)->user); cli_serv(cptr)->user = cli_user(by); cli_user(by)->refcnt++; } else { *(cli_serv(cptr))->by = '\0'; /* strcpy(cptr->serv->by, "Auto"); */ } cli_serv(cptr)->up = &me; SetConnecting(cptr); if (cli_fd(cptr) > HighestFd) HighestFd = cli_fd(cptr); LocalClientArray[cli_fd(cptr)] = cptr; Count_newunknown(UserStats); /* Actually we lie, the connect hasn't succeeded yet, but we have a valid * cptr, so we register it now. * Maybe these two calls should be merged. */ add_client_to_list(cptr); hAddClient(cptr); /* nextping = CurrentTime; */ return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ? completed_connection(cptr) : 1; }