/* /* * Unreal Internet Relay Chat Daemon, src/s_bsd.c * Copyright (C) 1990 Jarkko Oikarinen and * University of Oulu, Computing Center * * 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 1, 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. */ /* -- Jto -- 07 Jul 1990 * Added jlp@hamblin.byu.edu's debugtty fix */ /* -- Armin -- Jun 18 1990 * Added setdtablesize() for more socket connections */ /* -- Jto -- 13 May 1990 * Added several fixes from msa: * Better error messages * Changes in check_access * Added SO_REUSEADDR fix from zessel@informatik.uni-kl.de */ #ifndef lint static char sccsid[] = "@(#)s_bsd.c 2.78 2/7/94 (C) 1988 University of Oulu, \ Computing Center and Jarkko Oikarinen"; #endif #include "struct.h" #include "common.h" #include "sys.h" #include "res.h" #include "numeric.h" #include "version.h" #ifndef _WIN32 #include #include #include #include #else #include #endif #if defined(_SOLARIS) #include #endif #include "inet.h" #include #include #include #ifdef AIX # include # include #else # include "nameser.h" #endif #include "resolv.h" #include "sock.h" /* If FD_ZERO isn't define up to this point, */ #include #include "proto.h" /* define it (BSD4.2 needs this) */ #include "h.h" #ifndef NO_FDLIST #include "fdlist.h" #endif #ifdef USE_POLL #include int rr; #endif #ifndef IN_LOOPBACKNET #define IN_LOOPBACKNET 0x7f #endif #define INADDRSZ sizeof(struct IN_ADDR) #define IN6ADDRSZ sizeof(struct IN_ADDR) extern char backupbuf[8192]; aClient *local[MAXCONNECTIONS]; int highest_fd = 0, readcalls = 0, resfd = -1; static struct SOCKADDR_IN mysk; static struct SOCKADDR *connect_inet PROTO((aConfItem *, aClient *, int *)); static int completed_connection PROTO((aClient *)); static int check_init PROTO((aClient *, char *)); #ifndef _WIN32 static void do_dns_async PROTO(()), set_sock_opts PROTO((int, aClient *)); #else static void set_sock_opts PROTO((int, aClient *)); #endif static char readbuf[8192]; char zlinebuf[BUFSIZE]; extern char *version; extern ircstats IRCstats; #ifndef NO_FDLIST extern fdlist default_fdlist; extern fdlist busycli_fdlist; extern fdlist serv_fdlist; extern fdlist oper_fdlist; extern fdlist socks_fdlist; #endif #ifdef NEWDNS void newdns_lookupfromip( aClient *); #endif /*NEWDNS*/ /* * Try and find the correct name to use with getrlimit() for setting the max. * number of files allowed to be open by this process. */ #ifdef RLIMIT_FDMAX # define RLIMIT_FD_MAX RLIMIT_FDMAX #else # ifdef RLIMIT_NOFILE # define RLIMIT_FD_MAX RLIMIT_NOFILE # else # ifdef RLIMIT_OPEN_MAX # define RLIMIT_FD_MAX RLIMIT_OPEN_MAX # else # undef RLIMIT_FD_MAX # endif # endif #endif /* ** add_local_domain() ** Add the domain to hostname, if it is missing ** (as suggested by eps@TOASTER.SFSU.EDU) */ void add_local_domain(hname, size) char *hname; int size; { #ifdef RES_INIT /* try to fix up unqualified names */ if (!index(hname, '.')) { if (!(_res.options & RES_INIT)) { Debug((DEBUG_DNS, "res_init()")); res_init(); } if (_res.defdname[0]) { (void)strncat(hname, ".", size - 1); (void)strncat(hname, _res.defdname, size - 2); } } #endif return; } /* ** Cannot use perror() within daemon. stderr is closed in ** ircd and cannot be used. And, worse yet, it might have ** been reassigned to a normal connection... */ /* ** report_error ** This a replacement for perror(). Record error to log and ** also send a copy to all *LOCAL* opers online. ** ** text is a *format* string for outputting error. It must ** contain only two '%s', the first will be replaced ** by the sockhost from the cptr, and the latter will ** be taken from sys_errlist[errno]. ** ** cptr if not NULL, is the *LOCAL* client associated with ** the error. */ void report_error(text, cptr) char *text; aClient *cptr; { #ifndef _WIN32 int errtmp = errno; /* debug may change 'errno' */ #else int errtmp = WSAGetLastError(); /* debug may change 'errno' */ #endif char *host; int err, len = sizeof(err); host = (cptr) ? get_client_name(cptr, FALSE) : ""; /* fprintf(stderr, text, host, strerror(errtmp)); fputc('\n', stderr); */ Debug((DEBUG_ERROR, text, host, strerror(errtmp))); /* * Get the *real* error from the socket (well try to anyway..). * This may only work when SO_DEBUG is enabled but its worth the * gamble anyway. */ #ifdef SO_ERROR if (cptr && !IsMe(cptr) && cptr->fd >= 0) if (!getsockopt(cptr->fd, SOL_SOCKET, SO_ERROR, (OPT_TYPE *)&err, &len)) if (err) errtmp = err; #endif sendto_umode(UMODE_JUNK, text, host, strerror(errtmp)); ircd_log(text,host,strerror(errtmp)); #ifdef USE_SYSLOG syslog(LOG_WARNING, text, host, strerror(errtmp)); #endif return; } /* * inetport * * Create a socket in the AFINET domain, bind it to the port given in * 'port' and listen to it. Connections are accepted to this socket * depending on the IP# mask given by 'name'. Returns the fd of the * socket created or -1 on error. */ int inetport(cptr, name, port) aClient *cptr; char *name; int port; { static struct SOCKADDR_IN server; int ad[4], len = sizeof(server); char ipname[20]; if (BadPtr(name)) name = "*"; ad[0] = ad[1] = ad[2] = ad[3] = 0; /* * do it this way because building ip# from separate values for each * byte requires endian knowledge or some nasty messing. Also means * easy conversion of "*" 0.0.0.0 or 134.* to 134.0.0.0 :-) */ (void)sscanf(name, "%d.%d.%d.%d", &ad[0], &ad[1], &ad[2], &ad[3]); (void)ircsprintf(ipname, "%d.%d.%d.%d", ad[0], ad[1], ad[2], ad[3]); if (cptr != &me) { (void)ircsprintf(cptr->sockhost, "%-.42s.%.u", name, (unsigned int)port); (void)strcpy(cptr->name, me.name); } /* * At first, open a new socket */ if (cptr->fd == -1) cptr->fd = socket(AFINET, SOCK_STREAM, 0); if (cptr->fd < 0) { #if !defined(DEBUGMODE) && !defined(_WIN32) #endif report_error("Cannot open stream socket() %s:%s", cptr); return -1; } else if (cptr->fd >= MAXCLIENTS) { sendto_ops("No more connections allowed (%s)", cptr->name); #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif return -1; } set_sock_opts(cptr->fd, cptr); /* * Bind a port to listen for new connections if port is non-null, * else assume it is already open and try get something from it. */ if (port) { server.SIN_FAMILY = AFINET; /* per-port bindings, fixes /stats l */ #ifndef INET6 server.SIN_ADDR.S_ADDR = inet_addr(ipname); #else inet_pton(AFINET, ipname, server.SIN_ADDR.S_ADDR); #endif server.SIN_PORT = htons(port); /* * Try 10 times to bind the socket with an interval of 20 * seconds. Do this so we dont have to keepp trying manually * to bind. Why ? Because a port that has closed often lingers * around for a short time. * This used to be the case. Now it no longer is. * Could cause the server to hang for too long - avalon */ if (bind(cptr->fd, (struct SOCKADDR *)&server, sizeof(server)) == -1) { ircsprintf(backupbuf, "Error binding stream socket to IP %s port %i", ipname, port); strcat(backupbuf, "- %s:%s"); report_error(backupbuf, cptr); #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif return -1; } } if (getsockname(cptr->fd, (struct SOCKADDR *)&server, &len)) { report_error("getsockname failed for %s:%s", cptr); #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif return -1; } if (cptr == &me) /* KLUDGE to get it work... */ { char buf[1024]; (void)ircsprintf(buf, rpl_str(RPL_MYPORTIS), me.name, "*", ntohs(server.SIN_PORT)); (void)write(0, buf, strlen(buf)); } if (cptr->fd > highest_fd) highest_fd = cptr->fd; #ifdef INET6 bcopy(server.sin6_addr.s6_addr, cptr->ip.s6_addr, IN6ADDRSZ); #else cptr->ip.S_ADDR = name ? inet_addr(ipname) : me.ip.S_ADDR; #endif cptr->port = (int)ntohs(server.SIN_PORT); (void)listen(cptr->fd, LISTEN_SIZE); local[cptr->fd] = cptr; return 0; } /* * add_listener * * Create a new client which is essentially the stub like 'me' to be used * for a socket that is passive (listen'ing for connections to be accepted). */ int add_listener(aconf) aConfItem *aconf; { aClient *cptr; char *p; cptr = make_client(NULL, NULL); cptr->flags = FLAGS_LISTEN; cptr->acpt = cptr; cptr->from = cptr; SetMe(cptr); strncpyzt(cptr->name, aconf->host, sizeof(cptr->name)); if (inetport(cptr, aconf->host, aconf->port)) cptr->fd = -2; p = aconf->passwd; if (*p == '*') cptr->umodes = LISTENER_NORMAL; else { for (; *p; p++) { switch (*p) { case 'C': if (!(cptr->umodes & LISTENER_SERVERSONLY)) cptr->umodes |= LISTENER_CLIENTSONLY; break; case 'S': if (!(cptr->umodes & LISTENER_CLIENTSONLY)) cptr->umodes |= LISTENER_SERVERSONLY; break; #ifdef USE_SSL case 's': cptr->umodes |= LISTENER_SSL; break; #endif case 'R': cptr->umodes = 0; cptr->umodes |= LISTENER_REMOTEADMIN; break; case 'J': cptr->umodes |= LISTENER_JAVACLIENT; break; case 'I': { cptr->umodes |= LISTENER_MASK; p++; /* */ strcpy(cptr->info, p); } } } } strcpy(cptr->name, aconf->name); if (cptr->fd >= 0) { cptr->confs = make_link(); cptr->confs->next = NULL; cptr->confs->value.aconf = aconf; set_non_blocking(cptr->fd, cptr); } else free_client(cptr); return 0; } /* * close_listeners * * Close and free all clients which are marked as having their socket open * and in a state where they can accept connections. */ void close_listeners() { aClient *cptr; int i; aConfItem *aconf; /* * close all 'extra' listening ports we have */ for (i = highest_fd; i >= 0; i--) { if (!(cptr = local[i])) continue; if (!IsMe(cptr) || cptr == &me || !IsListening(cptr)) continue; aconf = cptr->confs->value.aconf; if (IsIllegal(aconf) && aconf->clients == 0) { close_connection(cptr); } } } /* * init_sys */ void init_sys() { int fd; #ifndef USE_POLL #ifdef RLIMIT_FD_MAX struct rlimit limit; if (!getrlimit(RLIMIT_FD_MAX, &limit)) { if (limit.rlim_max < MAXCONNECTIONS) { (void)fprintf(stderr, "ircd fd table too big\n"); (void)fprintf(stderr, "Hard Limit: %d IRC max: %d\n", limit.rlim_max, MAXCONNECTIONS); (void)fprintf(stderr, "Fix MAXCONNECTIONS\n"); exit(-1); } limit.rlim_cur = limit.rlim_max; /* make soft limit the max */ if (setrlimit(RLIMIT_FD_MAX, &limit) == -1) { (void)fprintf(stderr, "error setting max fd's to %d\n", limit.rlim_cur); exit(-1); } } #endif #endif /* Startup message pid = getpid(); pid++; fprintf(stderr, "|---------------------------------------------\n"); fprintf(stderr, "| UnrealIRCD has successfully loaded.\n"); fprintf(stderr, "| Config Directory: %s\n", DPATH); fprintf(stderr, "| MAXCONNECTIONS set at %d\n", MAXCONNECTIONS); fprintf(stderr, "| Process ID: %d\n", pid); fprintf(stderr, "|---------------------------------------------\n"); */ #if defined(PCS) || defined(SVR3) char logbuf[BUFSIZ]; (void)setvbuf(stderr, logbuf, _IOLBF, sizeof(logbuf)); #else # if defined(HPUX) (void)setvbuf(stderr, NULL, _IOLBF, 0); # else # if !defined(_SOLARIS) && !defined(_WIN32) (void)setlinebuf(stderr); # endif # endif #endif #ifndef _WIN32 for (fd = 3; fd < MAXCONNECTIONS; fd++) { (void)close(fd); local[fd] = NULL; } local[1] = NULL; (void)close(1); if (bootopt & BOOT_TTY) /* debugging is going to a tty */ goto init_dgram; if (!(bootopt & BOOT_DEBUG)) (void)close(2); if ((bootopt & BOOT_CONSOLE) || isatty(0)) { #ifndef _AMIGA /* if (fork()) exit(0); */ #endif #ifdef TIOCNOTTY if ((fd = open("/dev/tty", O_RDWR)) >= 0) { (void)ioctl(fd, TIOCNOTTY, (char *)NULL); (void)close(fd); } #endif #if defined(HPUX) || defined(_SOLARIS) || \ defined(_POSIX_SOURCE) || defined(SVR4) || defined(SGI) (void)setsid(); #else (void)setpgrp(0, (int)getpid()); #endif (void)close(0); /* fd 0 opened by inetd */ local[0] = NULL; } init_dgram: #endif /*_WIN32*/ #ifndef NEWDNS resfd = init_resolver(0x1f); #endif /*NEWDNS*/ return; } void write_pidfile() { #ifdef IRCD_PIDFILE int fd; char buff[20]; if ((fd = open(IRCD_PIDFILE, O_CREAT | O_WRONLY, 0600)) >= 0) { bzero(buff, sizeof(buff)); (void)ircsprintf(buff, "%5d\n", (int)getpid()); if (write(fd, buff, strlen(buff)) == -1) Debug((DEBUG_NOTICE, "Error writing to pid file %s", IRCD_PIDFILE)); (void)close(fd); return; } #ifdef DEBUGMODE else Debug((DEBUG_NOTICE, "Error opening pid file %s", IRCD_PIDFILE)); #endif #endif } #ifdef INET6 #undef IN6_IS_ADDR_LOOPBACK int IN6_IS_ADDR_LOOPBACK(u_int32_t * f) { if ((*f == 0) && (*(f + 1) == 0) && (*(f + 2) == 0) && (*(f + 3) == htonl(1))) return 1; return 0; } #define IN6_IS_ADDR_LOOPBACK(a) \ ((u_int32_t) (a)[0] == 0) && \ ((u_int32_t) (a)[1] == 0) && \ ((u_int32_t) (a)[2] == 0) && \ ((u_int32_t) (a)[3] == htonl(1)) #endif /* * Initialize the various name strings used to store hostnames. This is set * from either the server's sockhost (if client fd is a tty or localhost) * or from the ip# converted into a string. 0 = success, -1 = fail. */ static int check_init(cptr, sockn) aClient *cptr; char *sockn; { struct SOCKADDR_IN sk; int len = sizeof(struct SOCKADDR_IN); /* If descriptor is a tty, special checking... */ #ifndef _WIN32 if (isatty(cptr->fd)) #else if (0) #endif { strncpyzt(sockn, me.sockhost, HOSTLEN); bzero((char *)&sk, sizeof(struct SOCKADDR_IN)); } else if (getpeername(cptr->fd, (struct SOCKADDR *)&sk, &len) == -1) { report_error("connect failure: %s %s", cptr); return -1; } #ifdef INET6 inetntop(AF_INET6, (char *)&sk.sin6_addr, sockn, MYDUMMY_SIZE); #else (void)strcpy(sockn, (char *)inetntoa((char *)&sk.SIN_ADDR)); #endif #ifdef INET6 #undef IN6_IS_ADDR_LOOPBACK if (IN6_IS_ADDR_LOOPBACK(&sk.SIN_ADDR)) #else if (inet_netof(sk.SIN_ADDR) == IN_LOOPBACKNET) #endif { cptr->hostp = NULL; strncpyzt(sockn, me.sockhost, HOSTLEN); } bcopy((char *)&sk.SIN_ADDR, (char *)&cptr->ip, sizeof(struct IN_ADDR)); cptr->port = (int)ntohs(sk.SIN_PORT); return 0; } /* * Ordinary client access check. Look for conf lines which have the same * status as the flags passed. * 0 = Success * -1 = Access denied * -2 = Bad socket. */ int check_client(cptr) aClient *cptr; { static char sockname[HOSTLEN + 1]; struct hostent *hp = NULL; int i; ClearAccess(cptr); Debug((DEBUG_DNS, "ch_cl: check access for %s[%s]", cptr->name, inetntoa((char *)&cptr->ip))); if (check_init(cptr, sockname)) return -2; hp = cptr->hostp; /* * Verify that the host to ip mapping is correct both ways and that * the ip#(s) for the socket is listed for the host. */ if (hp) { for (i = 0; hp->h_addr_list[i]; i++) if (!bcmp(hp->h_addr_list[i], (char *)&cptr->ip, sizeof(struct IN_ADDR))) break; if (!hp->h_addr_list[i]) { sendto_ops("IP# Mismatch: %s != %s[%08x]", inetntoa((char *)&cptr->ip), hp->h_name, *((unsigned long *)hp->h_addr)); hp = NULL; } } if ((i = attach_Iline(cptr, hp, sockname))) { Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]", cptr->name, sockname)); return i; } Debug((DEBUG_DNS, "ch_cl: access ok: %s[%s]", cptr->name, sockname)); #ifdef INET6 if (IN6_IS_ADDR_LOOPBACK(&cptr->ip) || (cptr->ip.s6_laddr[0] == mysk.sin6_addr.s6_laddr[0] && cptr->ip.s6_laddr[1] == mysk.sin6_addr.s6_laddr[1]) /* || IN6_ARE_ADDR_SAMEPREFIX(&cptr->ip, &mysk.SIN_ADDR)) about the same, I think NOT */ ) #else if (inet_netof(cptr->ip) == IN_LOOPBACKNET || inet_netof(cptr->ip) == inet_netof(mysk.SIN_ADDR)) #endif { ircstp->is_loc++; cptr->flags |= FLAGS_LOCAL; } return 0; } #define CFLAG CONF_CONNECT_SERVER #define NFLAG CONF_NOCONNECT_SERVER /* * check_server_init(), check_server() * check access for a server given its name (passed in cptr struct). * Must check for all C/N lines which have a name which matches the * name given and a host which matches. A host alias which is the * same as the server name is also acceptable in the host field of a * C/N line. * 0 = Success * -1 = Access denied * -2 = Bad socket. */ int check_server_init(cptr) aClient *cptr; { char *name; aConfItem *c_conf = NULL, *n_conf = NULL; struct hostent *hp = NULL; Link *lp; name = cptr->name; Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]", name, cptr->sockhost)); if (IsUnknown(cptr) && !attach_confs(cptr, name, CFLAG | NFLAG)) { Debug((DEBUG_DNS, "No C/N lines for %s", name)); return -1; } lp = cptr->confs; /* * We initiated this connection so the client should have a C and N * line already attached after passing through the connec_server() * function earlier. */ if (IsConnecting(cptr) || IsHandshake(cptr)) { c_conf = find_conf(lp, name, CFLAG); n_conf = find_conf(lp, name, NFLAG); if (!c_conf || !n_conf) { sendto_ops("Connecting Error: %s[%s]", name, cptr->sockhost); det_confs_butmask(cptr, 0); return -1; } } /* ** If the servername is a hostname, either an alias (CNAME) or ** real name, then check with it as the host. Use gethostbyname() ** to check for servername as hostname. */ if (!cptr->hostp) { aConfItem *aconf; aconf = count_cnlines(lp); if (aconf) { char *s; Link lin; /* ** Do a lookup for the CONF line *only* and not ** the server connection else we get stuck in a ** nasty state since it takes a SERVER message to ** get us here and we cant interrupt that very ** well. */ ClearAccess(cptr); lin.value.aconf = aconf; lin.flags = ASYNC_CONF; nextdnscheck = 1; if ((s = index(aconf->host, '@'))) s++; else s = aconf->host; Debug((DEBUG_DNS, "sv_ci:cache lookup (%s)", s)); #ifndef NEWDNS hp = gethost_byname(s, &lin); #else /*NEWDNS*/ hp = newdns_checkcachename(s); #endif /*NEWDNS*/ } } return check_server(cptr, hp, c_conf, n_conf, 0); } int check_server(cptr, hp, c_conf, n_conf, estab) aClient *cptr; aConfItem *n_conf, *c_conf; struct hostent *hp; int estab; { char *name; char abuff[HOSTLEN + USERLEN + 2]; char sockname[HOSTLEN + 1], fullname[HOSTLEN + 1]; Link *lp = cptr->confs; int i; ClearAccess(cptr); if (check_init(cptr, sockname)) return -2; check_serverback: if (hp) { for (i = 0; hp->h_addr_list[i]; i++) if (!bcmp(hp->h_addr_list[i], (char *)&cptr->ip, sizeof(struct IN_ADDR))) break; if (!hp->h_addr_list[i]) { sendto_ops("IP# Mismatch: %s != %s[%08x]", inetntoa((char *)&cptr->ip), hp->h_name, *((unsigned long *)hp->h_addr)); hp = NULL; } } else if (cptr->hostp) { hp = cptr->hostp; goto check_serverback; } if (hp) /* * if we are missing a C or N line from above, search for * it under all known hostnames we have for this ip#. */ for (i = 0, name = hp->h_name; name; name = hp->h_aliases[i++]) { strncpyzt(fullname, name, sizeof(fullname)); add_local_domain(fullname, HOSTLEN - strlen(fullname)); Debug((DEBUG_DNS, "sv_cl: gethostbyaddr: %s->%s", sockname, fullname)); (void)ircsprintf(abuff, "%s@%s", cptr->username, fullname); if (!c_conf) c_conf = find_conf_host(lp, abuff, CFLAG); if (!n_conf) n_conf = find_conf_host(lp, abuff, NFLAG); if (c_conf && n_conf) { get_sockhost(cptr, fullname); break; } } name = cptr->name; /* * Check for C and N lines with the hostname portion the ip number * of the host the server runs on. This also checks the case where * there is a server connecting from 'localhost'. */ if (IsUnknown(cptr) && (!c_conf || !n_conf)) { (void)ircsprintf(abuff, "%s@%s", cptr->username, sockname); if (!c_conf) c_conf = find_conf_host(lp, abuff, CFLAG); if (!n_conf) n_conf = find_conf_host(lp, abuff, NFLAG); } /* * Attach by IP# only if all other checks have failed. * It is quite possible to get here with the strange things that can * happen when using DNS in the way the irc server does. -avalon */ if (!hp) { if (!c_conf) c_conf = find_conf_ip(lp, (char *)&cptr->ip, cptr->username, CFLAG); if (!n_conf) n_conf = find_conf_ip(lp, (char *)&cptr->ip, cptr->username, NFLAG); } else for (i = 0; hp->h_addr_list[i]; i++) { if (!c_conf) c_conf = find_conf_ip(lp, hp->h_addr_list[i], cptr->username, CFLAG); if (!n_conf) n_conf = find_conf_ip(lp, hp->h_addr_list[i], cptr->username, NFLAG); } /* * detach all conf lines that got attached by attach_confs() */ det_confs_butmask(cptr, 0); /* * if no C or no N lines, then deny access */ if (!c_conf || !n_conf) { get_sockhost(cptr, sockname); Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s] c %x n %x", name, cptr->username, cptr->sockhost, c_conf, n_conf)); return -1; } /* * attach the C and N lines to the client structure for later use. */ (void)attach_conf(cptr, n_conf); (void)attach_conf(cptr, c_conf); (void)attach_confs(cptr, name, CONF_HUB | CONF_LEAF | CONF_UWORLD); #ifdef INET6 if ((AND16(c_conf->ipnum.s6_addr) == 255)) #else if (c_conf->ipnum.S_ADDR == -1) #endif bcopy((char *)&cptr->ip, (char *)&c_conf->ipnum, sizeof(struct IN_ADDR)); get_sockhost(cptr, c_conf->host); Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]", name, cptr->sockhost)); if (estab) return m_server_estab(cptr); return 0; } #undef CFLAG #undef NFLAG /* ** completed_connection ** Complete non-blocking connect()-sequence. Check access and ** terminate connection, if trouble detected. ** ** Return TRUE, if successfully completed ** FALSE, if failed and ClientExit */ static int completed_connection(cptr) aClient *cptr; { aConfItem *aconf, *cline; extern char serveropts[]; SetHandshake(cptr); aconf = find_conf(cptr->confs, cptr->name, CONF_CONNECT_SERVER); cline = aconf; if (!aconf) { sendto_ops("Lost C-Line for %s", get_client_name(cptr, FALSE)); return -1; } if (!BadPtr(aconf->passwd)) sendto_one(cptr, "PASS :%s", aconf->passwd); aconf = find_conf(cptr->confs, cptr->name, CONF_NOCONNECT_SERVER); if (!aconf) { sendto_ops("Lost N-Line for %s", get_client_name(cptr, FALSE)); return -1; } #ifdef USE_SSL if (cline->options & CONNECT_SSL) if (!ssl_client_handshake(cptr)) { sendto_realops("Could not handshake SSL with %s", get_client_name(cptr, FALSE)); return -1; } else { cptr->flags |= FLAGS_SSL; } #endif sendto_one(cptr, "PROTOCTL %s", PROTOCTL_SERVER); sendto_one(cptr, "SERVER %s 1 :U%d-%s-%i %s", my_name_for_link(me.name, aconf), UnrealProtocol, serveropts, me.serv->numeric, me.info); if (!IsDead(cptr)) start_auth(cptr); return (IsDead(cptr)) ? -1 : 0; } /* ** close_connection ** Close the physical connection. This function must make ** MyConnect(cptr) == FALSE, and set cptr->from == NULL. */ void close_connection(cptr) aClient *cptr; { aConfItem *aconf; int i, j; int empty = cptr->fd; if (IsServer(cptr)) { ircstp->is_sv++; ircstp->is_sbs += cptr->sendB; ircstp->is_sbr += cptr->receiveB; ircstp->is_sks += cptr->sendK; ircstp->is_skr += cptr->receiveK; ircstp->is_sti += TStime() - cptr->firsttime; if (ircstp->is_sbs > 1023) { ircstp->is_sks += (ircstp->is_sbs >> 10); ircstp->is_sbs &= 0x3ff; } if (ircstp->is_sbr > 1023) { ircstp->is_skr += (ircstp->is_sbr >> 10); ircstp->is_sbr &= 0x3ff; } } else if (IsClient(cptr)) { ircstp->is_cl++; ircstp->is_cbs += cptr->sendB; ircstp->is_cbr += cptr->receiveB; ircstp->is_cks += cptr->sendK; ircstp->is_ckr += cptr->receiveK; ircstp->is_cti += TStime() - cptr->firsttime; if (ircstp->is_cbs > 1023) { ircstp->is_cks += (ircstp->is_cbs >> 10); ircstp->is_cbs &= 0x3ff; } if (ircstp->is_cbr > 1023) { ircstp->is_ckr += (ircstp->is_cbr >> 10); ircstp->is_cbr &= 0x3ff; } } else ircstp->is_ni++; /* * remove outstanding DNS queries. */ #ifndef NEWDNS del_queries((char *)cptr); #endif /*NEWDNS*/ /* * If the connection has been up for a long amount of time, schedule * a 'quick' reconnect, else reset the next-connect cycle. * * Now just hold on a minute. We're currently doing this when a * CLIENT exits too? I don't think so! If its not a server, or * the SQUIT flag has been set, then we don't schedule a fast * reconnect. Pisses off too many opers. :-) -Cabal95 */ if (IsServer(cptr) && !(cptr->flags & FLAGS_SQUIT) && (aconf = find_conf_exact(cptr->name, cptr->username, cptr->sockhost, CONF_CONNECT_SERVER))) { /* * Reschedule a faster reconnect, if this was a automaticly * 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 = TStime(); aconf->hold += (aconf->hold - cptr->since > HANGONGOODLINK) ? HANGONRETRYDELAY : ConfConFreq(aconf); if (nextconnect > aconf->hold) nextconnect = aconf->hold; } if (cptr->authfd >= 0) #ifndef _WIN32 (void)close(cptr->authfd); #else (void)closesocket(cptr->authfd); #endif #ifdef USE_SSL if (cptr->flags & FLAGS_SSL) SSL_shutdown((SSL *)cptr->ssl); #endif #ifdef SOCKSPORT if (cptr->socksfd >= 0) #ifndef _WIN32 (void)close(cptr->socksfd); #else (void)closesocket(cptr->socksfd); #endif /* _WIN32 */ #endif /* SOCKSPORT */ if (cptr->fd >= 0) { flush_connections(cptr->fd); local[cptr->fd] = NULL; #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif cptr->fd = -2; DBufClear(&cptr->sendQ); DBufClear(&cptr->recvQ); /* * clean up extra sockets from P-lines which have been * discarded. */ if (cptr->acpt != &me && cptr->acpt != cptr) { aconf = cptr->acpt->confs->value.aconf; if (aconf->clients > 0) aconf->clients--; if (!aconf->clients && IsIllegal(aconf)) close_connection(cptr->acpt); } } for (; highest_fd > 0; highest_fd--) if (local[highest_fd]) break; det_confs_butmask(cptr, 0); cptr->from = NULL; /* ...this should catch them! >:) --msa */ /* * fd remap to keep local[i] filled at the bottom. */ if (empty > 0) if ((j = highest_fd) > (i = empty) && (local[j]->status != STAT_LOG)) { if (dup2(j, i) == -1) return; local[i] = local[j]; local[i]->fd = i; local[j] = NULL; #ifndef NO_FDLIST /* update server list */ if (IsServer(local[i])) { delfrom_fdlist(j, &busycli_fdlist); delfrom_fdlist(j, &serv_fdlist); addto_fdlist(i, &busycli_fdlist); addto_fdlist(i, &serv_fdlist); } if (IsAnOper(local[i])) { delfrom_fdlist(j, &busycli_fdlist); delfrom_fdlist(j, &oper_fdlist); addto_fdlist(i, &busycli_fdlist); addto_fdlist(i, &oper_fdlist); } #endif #ifndef _WIN32 (void)close(j); #else (void)closesocket(j); #endif while (!local[highest_fd]) highest_fd--; } return; } /* ** set_sock_opts */ static void set_sock_opts(fd, cptr) int fd; aClient *cptr; { int opt; #ifdef SO_REUSEADDR opt = 1; if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (OPT_TYPE *)&opt, sizeof(opt)) < 0) report_error("setsockopt(SO_REUSEADDR) %s:%s", cptr); #endif #if defined(SO_DEBUG) && defined(DEBUGMODE) && 0 /* Solaris with SO_DEBUG writes to syslog by default */ #if !defined(_SOLARIS) || defined(USE_SYSLOG) opt = 1; if (setsockopt(fd, SOL_SOCKET, SO_DEBUG, (OPT_TYPE *)&opt, sizeof(opt)) < 0) report_error("setsockopt(SO_DEBUG) %s:%s", cptr); #endif /* _SOLARIS */ #endif #if defined(SO_USELOOPBACK) && !defined(_WIN32) opt = 1; if (setsockopt(fd, SOL_SOCKET, SO_USELOOPBACK, (OPT_TYPE *)&opt, sizeof(opt)) < 0) report_error("setsockopt(SO_USELOOPBACK) %s:%s", cptr); #endif #ifdef SO_RCVBUF opt = 8192; if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (OPT_TYPE *)&opt, sizeof(opt)) < 0) report_error("setsockopt(SO_RCVBUF) %s:%s", cptr); #endif #ifdef SO_SNDBUF # ifdef _SEQUENT_ /* seems that Sequent freezes up if the receving buffer is a different size * to the sending buffer (maybe a tcp window problem too). */ opt = 8192; # else opt = 8192; # endif if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (OPT_TYPE *)&opt, sizeof(opt)) < 0) report_error("setsockopt(SO_SNDBUF) %s:%s", cptr); #endif #if defined(IP_OPTIONS) && defined(IPPROTO_IP) && !defined(_WIN32) { char *s = readbuf, *t = readbuf + sizeof(readbuf) / 2; opt = sizeof(readbuf) / 8; if (getsockopt(fd, IPPROTO_IP, IP_OPTIONS, (OPT_TYPE *)t, &opt) < 0) report_error("getsockopt(IP_OPTIONS) %s:%s", cptr); else if (opt > 0 && opt != sizeof(readbuf) / 8) { for (*readbuf = '\0'; opt > 0; opt--, s += 3) (void)ircsprintf(s, "%02.2x:", *t++); *s = '\0'; sendto_ops("Connection %s using IP opts: (%s)", get_client_name(cptr, TRUE), readbuf); } if (setsockopt(fd, IPPROTO_IP, IP_OPTIONS, (OPT_TYPE *)NULL, 0) < 0) report_error("setsockopt(IP_OPTIONS) %s:%s", cptr); } #endif } int get_sockerr(cptr) aClient *cptr; { #ifndef _WIN32 int errtmp = errno, err = 0, len = sizeof(err); #else int errtmp = WSAGetLastError(), err = 0, len = sizeof(err); #endif #ifdef SO_ERROR if (cptr->fd >= 0) if (!getsockopt(cptr->fd, SOL_SOCKET, SO_ERROR, (OPT_TYPE *)&err, &len)) if (err) errtmp = err; #endif return errtmp; } /* ** set_non_blocking ** Set the client connection into non-blocking mode. If your ** system doesn't support this, you can make this a dummy ** function (and get all the old problems that plagued the ** blocking version of IRC--not a problem if you are a ** lightly loaded node...) */ void set_non_blocking(fd, cptr) int fd; aClient *cptr; { int res, nonb = 0; /* ** NOTE: consult ALL your relevant manual pages *BEFORE* changing ** these ioctl's. There are quite a few variations on them, ** as can be seen by the PCS one. They are *NOT* all the same. ** Heed this well. - Avalon. */ #ifdef NBLOCK_POSIX nonb |= O_NONBLOCK; #endif #ifdef NBLOCK_BSD nonb |= O_NDELAY; #endif #ifdef NBLOCK_SYSV /* This portion of code might also apply to NeXT. -LynX */ res = 1; if (ioctl(fd, FIONBIO, &res) < 0) report_error("ioctl(fd,FIONBIO) failed for %s:%s", cptr); #else # if !defined(_WIN32) if ((res = fcntl(fd, F_GETFL, 0)) == -1) report_error("fcntl(fd, F_GETFL) failed for %s:%s", cptr); else if (fcntl(fd, F_SETFL, res | nonb) == -1) report_error("fcntl(fd, F_SETL, nonb) failed for %s:%s", cptr); # else nonb = 1; if (ioctlsocket(fd, FIONBIO, &nonb) < 0) report_error("ioctlsocket(fd,FIONBIO) failed for %s:%s", cptr); # endif #endif return; } /* * Creates a client which has just connected to us on the given fd. * The sockhost field is initialized with the ip# of the host. * The client is added to the linked list of clients but isnt added to any * hash tables yuet since it doesnt have a name. */ aClient *add_connection(cptr, fd) aClient *cptr; int fd; { Link lin; aClient *acptr; aConfItem *aconf = NULL; acptr = make_client(NULL, &me); if (cptr != &me) aconf = cptr->confs->value.aconf; /* Removed preliminary access check. Full check is performed in * m_server and m_user instead. Also connection time out help to * get rid of unwanted connections. */ #ifndef _WIN32 if (isatty(fd)) /* If descriptor is a tty, special checking... */ #else if (0) #endif get_sockhost(acptr, cptr->sockhost); else { struct SOCKADDR_IN addr; int len = sizeof(struct SOCKADDR_IN); if (getpeername(fd, (struct SOCKADDR *)&addr, &len) == -1) { report_error("Failed in connecting to %s :%s", cptr); add_con_refuse: ircstp->is_ref++; acptr->fd = -2; free_client(acptr); #ifndef _WIN32 (void)close(fd); #else (void)closesocket(fd); #endif return NULL; } /* don't want to add "Failed in connecting to" here.. */ if (aconf && IsIllegal(aconf)) goto add_con_refuse; /* Copy ascii address to 'sockhost' just in case. Then we * have something valid to put into error messages... */ #ifdef INET6 inetntop(AF_INET6, (char *)&addr.sin6_addr, mydummy, MYDUMMY_SIZE); get_sockhost(acptr, (char *)mydummy); #else get_sockhost(acptr, (char *)inetntoa((char *)&addr.SIN_ADDR)); #endif bcopy((char *)&addr.SIN_ADDR, (char *)&acptr->ip, sizeof(struct IN_ADDR)); /* Check for zaps -- Barubary */ if (find_zap(acptr, 0)) { set_non_blocking(fd, acptr); set_sock_opts(fd, acptr); send(fd, zlinebuf, strlen(zlinebuf), 0); goto add_con_refuse; } else if (find_tkline_match_zap(acptr) != -1) { set_non_blocking(fd, acptr); set_sock_opts(fd, acptr); send(fd, zlinebuf, strlen(zlinebuf), 0); goto add_con_refuse; } acptr->port = ntohs(addr.SIN_PORT); #if 0 /* * Some genious along the lines of ircd took out the code * where ircd loads the IP mask from the P:Lines, so this * is useless untill that's added back. :) */ /* * Check that this socket (client) is allowed to accept * connections from this IP#. */ for (s = (char *)&cptr->ip, t = (char *)&acptr->ip, len = 4; len > 0; len--, s++, t++) { if (!*s) continue; if (*s != *t) break; } if (len) goto add_con_refuse; #endif #ifdef SHOWCONNECTINFO /* Start of the very first DNS check */ if (!(cptr->umodes & LISTENER_SSL)) FDwrite(fd, REPORT_DO_DNS, R_do_dns); #endif #ifndef USENEWDNS lin.flags = ASYNC_CLIENT; //newdns lin.value.cptr = acptr; Debug((DEBUG_DNS, "lookup %s", inetntoa((char *)&addr.SIN_ADDR))); acptr->hostp = gethost_byaddr((char *)&acptr->ip, &lin); if (!acptr->hostp) SetDNS(acptr); #ifdef SHOWCONNECTINFO else { if (!(cptr->umodes & LISTENER_SSL)) FDwrite(fd, REPORT_FIN_DNSC, R_do_dns); } #endif /*SHOWCONNECTINFO*/ nextdnscheck = 1; #else /*USENEWDNS*/ Debug((DEBUG_DNS, "lookup %s", inetntoa((char *)&addr.SIN_ADDR))); if (acptr->hostp = newdns_checkcacheip(acptr)) #ifdef SHOWCONNECTINFO if (!(cptr->umodes & LISTENER_SSL)) FDwrite(fd, REPORT_FIN_DNSC, R_fin_dnsc); #endif /*SHOWCONNECTINFO*/ #endif /*USENEWDNS*/ } if (aconf) aconf->clients++; acptr->fd = fd; if (fd > highest_fd) highest_fd = fd; local[fd] = acptr; acptr->acpt = cptr; #ifdef USE_SSL if (cptr->umodes & LISTENER_SSL) { ssl_handshake(acptr); acptr->flags |= FLAGS_SSL; } #endif add_client_to_list(acptr); set_non_blocking(acptr->fd, acptr); set_sock_opts(acptr->fd, acptr); IRCstats.unknown++; start_auth(acptr); #ifdef SOCKSPORT start_socks(acptr); #endif return acptr; } /* ** read_packet ** ** 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 */ #ifndef USE_POLL static int read_packet(cptr, rfd) aClient *cptr; fd_set *rfd; { int dolen = 0, length = 0, done; time_t now = TStime(); if (FD_ISSET(cptr->fd, rfd) && !(IsPerson(cptr) && DBufLength(&cptr->recvQ) > 6090)) { #ifndef _WIN32 errno = 0; #else WSASetLastError(0); #endif #ifdef INET6 length = recvfrom(cptr->fd, readbuf, sizeof(readbuf), 0, 0, 0); #else #ifndef USE_SSL length = recv(cptr->fd, readbuf, sizeof(readbuf), 0); #else if (cptr->flags & FLAGS_SSL) length = SSL_read((SSL *)cptr->ssl, readbuf, sizeof(readbuf)); else length = recv(cptr->fd, readbuf, sizeof(readbuf), 0); #endif #endif cptr->lasttime = now; if (cptr->lasttime > cptr->since) cptr->since = cptr->lasttime; cptr->flags &= ~(FLAGS_PINGSENT | FLAGS_NONL); /* * If not ready, fake it so it isnt closed */ if (length == -1 && #ifndef _WIN32 ((errno == EWOULDBLOCK) || (errno == EAGAIN))) #else (WSAGetLastError() == WSAEWOULDBLOCK)) #endif return 1; if (length <= 0) return length; } /* ** For server connections, we process as many as we can without ** worrying about the time of day or anything :) */ if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr) #ifdef CRYPTOIRCD || IsSecure(cptr) #endif ) { if (length > 0) if ((done = dopacket(cptr, readbuf, length))) return done; } 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 (dbuf_put(&cptr->recvQ, readbuf, length) < 0) return exit_client(cptr, cptr, cptr, "dbuf_put fail"); if (IsPerson(cptr) && DBufLength(&cptr->recvQ) > CLIENT_FLOOD) { sendto_umode(UMODE_FLOOD | UMODE_OPER, "*** Flood -- %s!%s@%s (%d) exceeds %d recvQ", cptr->name[0] ? cptr->name : "*", cptr->user ? cptr->user->username : "*", cptr->user ? cptr->user->realhost : "*", DBufLength(&cptr->recvQ), CLIENT_FLOOD); return exit_client(cptr, cptr, cptr, "Excess Flood"); } while (DBufLength(&cptr->recvQ) && !NoNewLine(cptr) && ((cptr->status < STAT_UNKNOWN) || (cptr->since - now < 10))) { /* ** If it has become registered as a Service or Server ** then skip the per-message parsing below. */ if (IsServer(cptr) #ifdef CRYPTOIRCD || IsSecure(cptr) #endif ) { dolen = dbuf_get(&cptr->recvQ, readbuf, sizeof(readbuf)); if (dolen <= 0) break; if ((done = dopacket(cptr, readbuf, dolen))) return done; break; } dolen = dbuf_getmsg(&cptr->recvQ, readbuf, sizeof(readbuf)); /* ** 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 */ while (dolen <= 0) { if (dolen < 0) return exit_client(cptr, cptr, cptr, "dbuf_getmsg fail"); if (DBufLength(&cptr->recvQ) < 510) { cptr->flags |= FLAGS_NONL; break; } dolen = dbuf_get(&cptr->recvQ, readbuf, 511); if (dolen > 0 && DBufLength(&cptr->recvQ)) DBufClear(&cptr->recvQ); } if (dolen > 0 && (dopacket(cptr, readbuf, dolen) == FLUSH_BUFFER)) return FLUSH_BUFFER; } } return 1; } #else /* handle taking care of the client's recvq here */ static int do_client_queue(aClient *cptr) { int dolen = 0, done; while (DBufLength(&cptr->recvQ) && !NoNewLine(cptr) && ((cptr->status < STAT_UNKNOWN) || (cptr->since - now < 10))) { /* If it's become registered as a server, just parse the whole block */ if (IsServer(cptr) #ifdef CRYPTOIRCD || IsSecure(cptr) #endif ) { dolen = dbuf_get(&cptr->recvQ, readbuf, sizeof(readbuf)); if (dolen <= 0) break; if ((done = dopacket(cptr, readbuf, dolen))) return done; break; } #if defined(MAXBUFFERS) dolen = dbuf_getmsg(&cptr->recvQ, readbuf, rcvbufmax * sizeof(char)); #else dolen = dbuf_getmsg(&cptr->recvQ, readbuf, sizeof(readbuf)); #endif if (dolen <= 0) { if (dolen < 0) return exit_client(cptr, cptr, cptr, "dbuf_getmsg fail"); if (DBufLength(&cptr->recvQ) < 510) { cptr->flags |= FLAGS_NONL; break; } /* The buffer is full (more than 512 bytes) and it has no \n * Some user is trying to trick us. Kill their recvq. */ DBufClear(&cptr->recvQ); break; } else if (dopacket(cptr, readbuf, dolen) == FLUSH_BUFFER) return FLUSH_BUFFER; } return 1; } #define MAX_CLIENT_RECVQ 8192 /* 4 dbufs */ static int read_packet(aClient *cptr) { int length = 0, done; /* If data is ready, and the user is either not a person or * is a person and has a recvq of less than MAX_CLIENT_RECVQ, * read from this client */ if (!(IsPerson(cptr) && DBufLength(&cptr->recvQ) > MAX_CLIENT_RECVQ)) { errno = 0; #ifndef USE_SSL length = recv(cptr->fd, readbuf, sizeof(readbuf), 0); #else if (cptr->flags & FLAGS_SSL) length = SSL_read((SSL *)cptr->ssl, readbuf, sizeof(readbuf)); else length = recv(cptr->fd, readbuf, sizeof(readbuf), 0); #endif cptr->lasttime = now; if (cptr->lasttime > cptr->since) cptr->since = cptr->lasttime; cptr->flags &= ~(FLAGS_PINGSENT | FLAGS_NONL); /* * If not ready, fake it so it isnt closed */ if (length == -1 && ((errno == EWOULDBLOCK) || (errno == EAGAIN))) return 1; if (length <= 0) return length; } /* * For server connections, we process as many as we can without * worrying about the time of day or anything :) */ if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr)) { if (length > 0) if ((done = dopacket(cptr, readbuf, length))) return done; } 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 (dbuf_put(&cptr->recvQ, readbuf, length) < 0) return exit_client(cptr, cptr, cptr, "dbuf_put fail"); if (IsPerson(cptr) && #ifdef NO_OPER_FLOOD !IsAnOper(cptr) && #endif DBufLength(&cptr->recvQ) > CLIENT_FLOOD) { sendto_umode(UMODE_FLOOD, "Flood -- %s!%s@%s (%d) Exceeds %d RecvQ", cptr->name[0] ? cptr->name : "*", cptr->user ? cptr->user->username : "*", cptr->user ? cptr->user->realhost : "*", DBufLength(&cptr->recvQ), CLIENT_FLOOD); return exit_client(cptr, cptr, cptr, "Excess Flood"); } return do_client_queue(cptr); } return 1; } #endif /* * Check all connections for new connections and input data that is to be * processed. Also check for connections with data queued and whether we can * write it out. */ #ifndef USE_POLL #ifdef NO_FDLIST int read_message(delay) #else int read_message(delay, listp) #endif time_t delay; /* Don't ever use ZERO here, unless you mean to poll and then * you have to have sleep/wait somewhere else in the code.--msa */ #ifndef NO_FDLIST fdlist *listp; #endif { aClient *cptr; int nfds; struct timeval wait; #ifndef _WIN32 fd_set read_set, write_set; #else fd_set read_set, write_set, excpt_set; #endif int j; time_t delay2 = delay, now; u_long usec = 0; int res, length, fd, i; int auth = 0; #ifdef SOCKSPORT int socks = 0; #endif int sockerr; #ifndef NO_FDLIST /* if it is called with NULL we check all active fd's */ if (!listp) { listp = &default_fdlist; listp->last_entry = highest_fd + 1; /* remember the 0th entry isnt used */ } #endif now = TStime(); for (res = 0;;) { FD_ZERO(&read_set); FD_ZERO(&write_set); #ifdef _WIN32 FD_ZERO(&excpt_set); #endif #ifdef NO_FDLIST for (i = highest_fd; i >= 0; i--) #else for (i = listp->entry[j = 1]; j <= listp->last_entry; i = listp->entry[++j]) #endif { if (!(cptr = local[i])) continue; if (IsLog(cptr)) continue; #ifdef SOCKSPORT if (DoingSocks(cptr)) { socks++; FD_SET(cptr->socksfd, &read_set); #ifdef _WIN32 FD_SET(cptr->socksfd, &excpt_set); #endif if (cptr->flags & FLAGS_WRSOCKS) FD_SET(cptr->socksfd, &write_set); } #endif /* SOCKSPORT */ if (DoingAuth(cptr)) { auth++; Debug((DEBUG_NOTICE, "auth on %x %d", cptr, i)); FD_SET(cptr->authfd, &read_set); #ifdef _WIN32 FD_SET(cptr->authfd, &excpt_set); #endif if (cptr->flags & FLAGS_WRAUTH) FD_SET(cptr->authfd, &write_set); } if (DoingDNS(cptr) || DoingAuth(cptr) #ifdef SOCKSPORT || DoingSocks(cptr) #endif ) continue; if (IsMe(cptr) && IsListening(cptr)) { FD_SET(i, &read_set); } else if (!IsMe(cptr)) { if (DBufLength(&cptr->recvQ) && delay2 > 2) delay2 = 1; if (DBufLength(&cptr->recvQ) < 4088) FD_SET(i, &read_set); } if (DBufLength(&cptr->sendQ) || IsConnecting(cptr) || (DoList(cptr) && IsSendable(cptr))) FD_SET(i, &write_set); } #ifdef SOCKSPORT if (me.socksfd >= 0) FD_SET(me.socksfd, &read_set); #endif #ifndef _WIN32 if (resfd >= 0) FD_SET(resfd, &read_set); #endif wait.tv_sec = MIN(delay2, delay); wait.tv_usec = usec; #ifdef HPUX nfds = select(FD_SETSIZE, (int *)&read_set, (int *)&write_set, 0, &wait); #else # ifndef _WIN32 nfds = select(FD_SETSIZE, &read_set, &write_set, 0, &wait); # else nfds = select(FD_SETSIZE, &read_set, &write_set, &excpt_set, &wait); # endif #endif #ifndef _WIN32 if (nfds == -1 && errno == EINTR) #else if (nfds == -1 && WSAGetLastError() == WSAEINTR) #endif return -1; else if (nfds >= 0) break; report_error("select %s:%s", &me); res++; if (res > 5) restart("too many select errors"); #ifndef _WIN32 sleep(10); #else Sleep(10); #endif } #ifdef SOCKSPORT if (me.socksfd >= 0 && FD_ISSET(me.socksfd, &read_set)) { int tmpsock; tmpsock = accept(me.socksfd, NULL, NULL); if (tmpsock >= 0) #ifdef _WIN32 closesocket(tmpsock); #else close(tmpsock); #endif /* _WIN32 */ FD_CLR(me.socksfd, &read_set); } #endif /* SOCKSPORT */ #ifndef _WIN32 if (resfd >= 0 && FD_ISSET(resfd, &read_set)) { do_dns_async(); nfds--; FD_CLR(resfd, &read_set); } #endif /* * Check fd sets for the auth fd's (if set and valid!) first * because these can not be processed using the normal loops below. * -avalon */ #ifdef NO_FDLIST for (i = highest_fd; (auth > 0) && (i >= 0); i--) #else for (i = listp->entry[j = 1]; j <= listp->last_entry; i = listp->entry[++j]) #endif { if (!(cptr = local[i])) continue; if (cptr->authfd < 0) continue; auth--; #ifdef _WIN32 /* * Because of the way windows uses select(), we have to use * the exception FD set to find out when a connection is * refused. ie Auth ports and /connect's. -Cabal95 */ if (FD_ISSET(cptr->authfd, &excpt_set)) { int err, len = sizeof(err); if (getsockopt(cptr->authfd, SOL_SOCKET, SO_ERROR, (OPT_TYPE *)&err, &len) || err) { ircstp->is_abad++; closesocket(cptr->authfd); if (cptr->authfd == highest_fd) while (!local[highest_fd]) highest_fd--; cptr->authfd = -1; cptr->flags &= ~(FLAGS_AUTH | FLAGS_WRAUTH); if (!DoingDNS(cptr)) SetAccess(cptr); if (nfds > 0) nfds--; continue; } } #endif if ((nfds > 0) && FD_ISSET(cptr->authfd, &write_set)) { nfds--; send_authports(cptr); } else if ((nfds > 0) && FD_ISSET(cptr->authfd, &read_set)) { nfds--; read_authports(cptr); } } #ifdef SOCKSPORT /* * I really hate to do this.. but another loop * to check to see if we have any socks fd's.. - darkrot */ for (i = highest_fd; (socks > 0) && (i >= 0); i--) { if (!(cptr = local[i])) continue; if (cptr->socksfd < 0 || IsMe(cptr)) continue; socks--; #ifdef _WIN32 /* * Because of the way windows uses select(), we have to use * the exception FD set to find out when a connection is * refused. ie Auth ports and /connect's. -Cabal95 */ if (FD_ISSET(cptr->socksfd, &excpt_set)) { int err, len = sizeof(err); if (getsockopt(cptr->socksfd, SOL_SOCKET, SO_ERROR, (OPT_TYPE *)&err, &len) || err) { ircstp->is_abad++; closesocket(cptr->socksfd); if (cptr->socksfd == highest_fd) while (!local[highest_fd]) highest_fd--; cptr->socksfd = -1; cptr->flags &= ~(FLAGS_SOCKS | FLAGS_WRSOCKS); if (nfds > 0) nfds--; continue; } } #endif /* _WIN32 */ if ((nfds > 0) && FD_ISSET(cptr->socksfd, &write_set)) { nfds--; send_socksquery(cptr); } else if ((nfds > 0) && FD_ISSET(cptr->socksfd, &read_set)) { nfds--; read_socks(cptr); } } #endif /* SOCKSPORT */ for (i = highest_fd; i >= 0; i--) if ((cptr = local[i]) && FD_ISSET(i, &read_set) && IsListening(cptr)) { FD_CLR(i, &read_set); nfds--; cptr->lasttime = TStime(); /* ** There may be many reasons for error return, but ** in otherwise correctly working environment the ** probable cause is running out of file descriptors ** (EMFILE, ENFILE or others?). The man pages for ** accept don't seem to list these as possible, ** although it's obvious that it may happen here. ** Thus no specific errors are tested at this ** point, just assume that connections cannot ** be accepted until some old is closed first. */ if ((fd = accept(i, NULL, NULL)) < 0) { report_error("Cannot accept connections %s:%s", cptr); break; } ircstp->is_ac++; if (fd >= MAXCLIENTS) { ircstp->is_ref++; sendto_ops("All connections in use. (%s)", get_client_name(cptr, TRUE)); #ifndef INET6 (void)send(fd, "ERROR :All connections in use\r\n", 32, 0); #else (void)sendto(fd, "ERROR :All connections in use\r\n", 32, 0, 0, 0); #endif #ifndef _WIN32 (void)close(fd); #else (void)closesocket(fd); #endif break; } /* * Use of add_connection (which never fails :) meLazy */ (void)add_connection(cptr, fd); nextping = TStime(); if (!cptr->acpt) cptr->acpt = &me; } for (i = highest_fd; i >= 0; i--) { if (!(cptr = local[i]) || IsMe(cptr)) continue; if (FD_ISSET(i, &write_set)) { int write_err = 0; nfds--; /* ** ...room for writing, empty some queue then... */ ClearBlocked(cptr); if (IsConnecting(cptr)) write_err = completed_connection(cptr); if (!write_err) { if (DoList(cptr) && IsSendable(cptr)) send_list(cptr, 32); (void)send_queued(cptr); } if (IsDead(cptr) || write_err) { deadsocket: if (FD_ISSET(i, &read_set)) { nfds--; FD_CLR(i, &read_set); } (void)exit_client(cptr, cptr, &me, ((sockerr = get_sockerr(cptr)) ? strerror(sockerr) : "Client exited")); continue; } } length = 1; /* for fall through case */ if (!NoNewLine(cptr) || FD_ISSET(i, &read_set)) length = read_packet(cptr, &read_set); if (length > 0) flush_connections(i); if ((length != FLUSH_BUFFER) && IsDead(cptr)) goto deadsocket; if (!FD_ISSET(i, &read_set) && length > 0) continue; nfds--; readcalls++; if (length > 0) continue; /* ** ...hmm, with non-blocking sockets we might get ** here from quite valid reasons, although.. why ** would select report "data available" when there ** wasn't... so, this must be an error anyway... --msa ** actually, EOF occurs when read() returns 0 and ** in due course, select() returns that fd as ready ** for reading even though it ends up being an EOF. -avalon */ #ifndef _WIN32 Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d %d", i, errno, length)); #else Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d %d", i, WSAGetLastError(), length)); #endif /* ** NOTE: if length == -2 then cptr has already been freed! */ if (length != -2 && (IsServer(cptr) || IsHandshake(cptr))) { if (length == 0) { sendto_locfailops ("Server %s closed the connection", get_client_name(cptr, FALSE)); sendto_serv_butone(&me, ":%s GLOBOPS :Server %s closed the connection", me.name, get_client_name(cptr, FALSE)); } else report_error("Lost connection to %s:%s", cptr); } if (length != FLUSH_BUFFER) (void)exit_client(cptr, cptr, &me, ((sockerr = get_sockerr(cptr)) ? strerror(sockerr) : "Client exited")); } return 0; } #else /* USE_POLL */ # ifdef AIX # define POLLREADFLAGS (POLLIN|POLLMSG) # endif # if defined(POLLMSG) && defined(POLLIN) && defined(POLLRDNORM) # define POLLREADFLAGS (POLLMSG|POLLIN|POLLRDNORM) # endif # if defined(POLLIN) && defined(POLLRDNORM) && !defined(POLLMSG) # define POLLREADFLAGS (POLLIN|POLLRDNORM) # endif # if defined(POLLIN) && !defined(POLLRDNORM) && !defined(POLLMSG) # define POLLREADFLAGS POLLIN # endif # if defined(POLLRDNORM) && !defined(POLLIN) && !defined(POLLMSG) # define POLLREADFLAGS POLLRDNORM # endif # if defined(POLLOUT) && defined(POLLWRNORM) # define POLLWRITEFLAGS (POLLOUT|POLLWRNORM) # else # if defined(POLLOUT) # define POLLWRITEFLAGS POLLOUT # else # if defined(POLLWRNORM) # define POLLWRITEFLAGS POLLWRNORM # endif # endif # endif # if defined(POLLERR) && defined(POLLHUP) # define POLLERRORS (POLLERR|POLLHUP) # else # define POLLERRORS POLLERR # endif # define PFD_SETR(thisfd) { CHECK_PFD(thisfd);\ pfd->events |= POLLREADFLAGS; } # define PFD_SETW(thisfd) { CHECK_PFD(thisfd);\ pfd->events |= POLLWRITEFLAGS; } # define CHECK_PFD( thisfd ) \ if ( pfd->fd != thisfd ) { \ pfd = &poll_fdarray[nbr_pfds++];\ pfd->fd = thisfd; \ pfd->events = 0; \ } #ifdef NO_FDLIST #error You cannot set NO_FDLIST and USE_POLL at same time! #else int read_message(delay, listp) #endif time_t delay; /* Don't ever use ZERO here, unless you mean to poll and then * you have to have sleep/wait somewhere else in the code.--msa */ fdlist *listp; { aClient *cptr; int nfds; static struct pollfd poll_fdarray[MAXCONNECTIONS]; struct pollfd *pfd = poll_fdarray; struct pollfd *res_pfd = NULL; struct pollfd *socks_pfd = NULL; int nbr_pfds = 0; u_long waittime; time_t delay2 = delay; int res, length, fd; int auth, rw, socks; int sockerr; int i, j; static char errmsg[512]; static aClient *authclnts[MAXCONNECTIONS]; static aClient *socksclnts[MAXCONNECTIONS]; /* if it is called with NULL we check all active fd's */ if (!listp) { listp = &default_fdlist; listp->last_entry = highest_fd + 1; } for (res = 0;;) { nbr_pfds = 0; pfd = poll_fdarray; pfd->fd = -1; res_pfd = NULL; socks_pfd = NULL; auth = 0; socks = 0; for (i = listp->entry[j = 1]; j <= listp->last_entry; i = listp->entry[++j]) { if (!(cptr = local[i])) continue; if (IsLog(cptr)) continue; if (DoingAuth(cptr)) { if (auth == 0) memset((char *)&authclnts, '\0', sizeof(authclnts)); auth++; Debug((DEBUG_NOTICE, "auth on %x %d", cptr, i)); PFD_SETR(cptr->authfd); if (cptr->flags & FLAGS_WRAUTH) PFD_SETW(cptr->authfd); authclnts[cptr->authfd] = cptr; continue; } #ifdef SOCKSPORT if (DoingSocks(cptr)) { if (socks == 0) memset((char *)&socksclnts, '\0', sizeof(authclnts)); socks++; Debug((DEBUG_NOTICE, "socks on %x %d", cptr, i)); PFD_SETR(cptr->socksfd); if (cptr->flags & FLAGS_WRSOCKS) PFD_SETW(cptr->socksfd); socksclnts[cptr->socksfd] = cptr; continue; } #endif if (DoingDNS(cptr) || DoingAuth(cptr) #ifdef SOCKSPORT || DoingSocks(cptr) #endif ) continue; if (IsMe(cptr) && IsListening(cptr)) { #define CONNECTFAST # ifdef CONNECTFAST /* * This is VERY bad if someone tries to send a lot of * clones to the server though, as mbuf's can't be * allocated quickly enough... - Comstud */ PFD_SETR(i); # else if (now > (cptr->lasttime + 2)) { PFD_SETR(i); } else if (delay2 > 2) delay2 = 2; # endif } else if (!IsMe(cptr)) { /* if (DBufLength(&cptr->recvQ) && delay2 > 2) delay2 = 1; */ if (DBufLength(&cptr->recvQ) < 4088) PFD_SETR(i); } length = DBufLength(&cptr->sendQ); if (DoList(cptr) && IsSendable(cptr)) { send_list(cptr, 64); length = DBufLength(&cptr->sendQ); } if (length || IsConnecting(cptr)) PFD_SETW(i); } if (resfd >= 0) { PFD_SETR(resfd); res_pfd = pfd; } if (me.socksfd >= 0) { PFD_SETR(me.socksfd); socks_pfd = pfd; } waittime = MIN(delay2, delay) * 1000; nfds = poll(poll_fdarray, nbr_pfds, waittime); if (nfds == -1 && ((errno == EINTR) || (errno == EAGAIN))) return -1; else if (nfds >= 0) break; report_error("poll %s:%s", &me); res++; if (res > 5) restart("too many poll errors"); sleep(10); } if (res_pfd && (res_pfd->revents & (POLLREADFLAGS | POLLERRORS))) { do_dns_async(); nfds--; } if (socks_pfd && (socks_pfd->revents & (POLLREADFLAGS | POLLERRORS))) { int tmpsock; nfds--; tmpsock = accept(me.socksfd, NULL, NULL); if (tmpsock >= 0) close(tmpsock); } for (pfd = poll_fdarray, i = 0; (nfds > 0) && (i < nbr_pfds); i++, pfd++) { if (!pfd->revents) continue; if (pfd == res_pfd) continue; if (pfd == socks_pfd) continue; nfds--; fd = pfd->fd; rr = pfd->revents & POLLREADFLAGS; rw = pfd->revents & POLLWRITEFLAGS; if (pfd->revents & POLLERRORS) { if (pfd->events & POLLREADFLAGS) rr++; if (pfd->events & POLLWRITEFLAGS) rw++; } if ((auth > 0) && ((cptr = authclnts[fd]) != NULL) && (cptr->authfd == fd)) { auth--; if (rr) read_authports(cptr); if (rw) send_authports(cptr); continue; } #ifdef SOCKSPORT if ((socks > 0) && ((cptr = socksclnts[fd]) != NULL) && (cptr->socksfd == fd)) { socks--; if (rr) { read_socks(cptr); continue; } if (rw) { send_socksquery(cptr); } continue; } #endif if (!(cptr = local[fd])) continue; if (rr && IsListening(cptr)) { cptr->lasttime = TStime(); /* ** There may be many reasons for error return, but ** in otherwise correctly working environment the ** probable cause is running out of file descriptors ** (EMFILE, ENFILE or others?). The man pages for ** accept don't seem to list these as possible, ** although it's obvious that it may happen here. ** Thus no specific errors are tested at this ** point, just assume that connections cannot ** be accepted until some old is closed first. */ if ((fd = accept(fd, NULL, NULL)) < 0) { report_error("Cannot accept connections %s:%s", cptr); break; } ircstp->is_ac++; if (fd >= MAXCLIENTS) { ircstp->is_ref++; sendto_ops("All connections in use. (%s)", get_client_name(cptr, TRUE)); (void)send(fd, "ERROR :All connections in use\r\n", 32, 0); (void)close(fd); break; } /* * Use of add_connection (which never fails :) meLazy */ (void)add_connection(cptr, fd); nextping = TStime(); if (!cptr->acpt) cptr->acpt = &me; continue; } if (IsMe(cptr)) continue; if (rw) /* socket is marked for writing.. */ { int write_err = 0; if (IsConnecting(cptr)) write_err = completed_connection(cptr); if (!write_err) (void)send_queued(cptr); if (IsDead(cptr) || write_err) { (void)exit_client(cptr, cptr, &me, ((sockerr = get_sockerr(cptr)) ? strerror(sockerr) : "Client exited")); continue; } } length = 1; /* for fall through case */ if (rr) length = read_packet(cptr); else if (IsPerson(cptr) && !NoNewLine(cptr)) length = do_client_queue(cptr); # ifdef DEBUGMODE readcalls++; # endif if (length == FLUSH_BUFFER) continue; if (IsDead(cptr)) { ircsprintf(errmsg, "Read/Dead Error: %s", strerror(get_sockerr(cptr))); exit_client(cptr, cptr, &me, errmsg); continue; } if (length > 0) continue; /* An error has occured reading from cptr, drop it. */ /* ** NOTE: if length == -2 then cptr has already been freed! */ if (length != -2 && (IsServer(cptr) || IsHandshake(cptr))) { if (length == 0) { sendto_locfailops ("Server %s closed the connection", get_client_name(cptr, FALSE)); sendto_serv_butone(&me, ":%s GLOBOPS :Server %s closed the connection", me.name, get_client_name(cptr, FALSE)); } else report_error("Lost connection to %s:%s", cptr); } if (length != FLUSH_BUFFER) (void)exit_client(cptr, cptr, &me, ((sockerr = get_sockerr(cptr)) ? strerror(sockerr) : "Client exited")); } return 0; } #endif /* * connect_server */ int connect_server(aconf, by, hp) aConfItem *aconf; aClient *by; struct hostent *hp; { struct SOCKADDR *svp; aClient *cptr, *c2ptr; char *s; int errtmp, len; Debug((DEBUG_NOTICE, "Connect to %s[%s] @%s", aconf->name, aconf->host, inetntoa((char *)&aconf->ipnum))); if ((c2ptr = find_server_quick(aconf->name))) { sendto_ops("Server %s already present from %s", aconf->name, get_client_name(c2ptr, TRUE)); if (by && IsPerson(by) && !MyClient(by)) sendto_one(by, ":%s NOTICE %s :*** Server %s already present from %s", me.name, by->name, aconf->name, get_client_name(c2ptr, TRUE)); return -1; } /* * If we dont know the IP# for this host and itis a hostname and * not a ip# string, then try and find the appropriate host record. */ if ((!aconf->ipnum.S_ADDR)) { Link lin; lin.flags = ASYNC_CONNECT; lin.value.aconf = aconf; nextdnscheck = 1; s = (char *)index(aconf->host, '@'); s++; /* should NEVER be NULL */ #ifndef INET6 if ((aconf->ipnum.S_ADDR = inet_addr(s)) == -1) #else if (!inet_pton(AF_INET6, s, aconf->ipnum.s6_addr)) #endif { #ifdef INET6 bzero(aconf->ipnum.s6_addr, IN6ADDRSZ); #else aconf->ipnum.S_ADDR = 0; #endif #ifndef NEWDNS hp = gethost_byname(s, &lin); #else /*NEWDNS*/ hp = newdns_checkcachename(s); #endif /*NEWDNS*/ Debug((DEBUG_NOTICE, "co_sv: hp %x ac %x na %s ho %s", hp, aconf, aconf->name, s)); if (!hp) return 0; bcopy(hp->h_addr, (char *)&aconf->ipnum, sizeof(struct IN_ADDR)); } } cptr = make_client(NULL, NULL); cptr->hostp = hp; /* * Copy these in so we have something for error detection. */ strncpyzt(cptr->name, aconf->name, sizeof(cptr->name)); strncpyzt(cptr->sockhost, aconf->host, HOSTLEN + 1); svp = connect_inet(aconf, cptr, &len); if (!svp) { if (cptr->fd != -1) #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif cptr->fd = -2; free_client(cptr); return -1; } set_non_blocking(cptr->fd, cptr); set_sock_opts(cptr->fd, cptr); #ifndef _WIN32 (void)signal(SIGALRM, dummy); if (connect(cptr->fd, svp, len) < 0 && errno != EINPROGRESS) { errtmp = errno; /* other system calls may eat errno */ #else if (connect(cptr->fd, svp, len) < 0 && WSAGetLastError() != WSAEINPROGRESS && WSAGetLastError() != WSAEWOULDBLOCK) { errtmp = WSAGetLastError(); /* other system calls may eat errno */ #endif report_error("Connect to host %s failed: %s", cptr); if (by && IsPerson(by) && !MyClient(by)) sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.", me.name, by->name, cptr); #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif cptr->fd = -2; free_client(cptr); #ifndef _WIN32 errno = errtmp; if (errno == EINTR) errno = ETIMEDOUT; #else WSASetLastError(errtmp); if (errtmp == WSAEINTR) WSASetLastError(WSAETIMEDOUT); #endif return -1; } /* Attach config entries to client here rather than in * completed_connection. This to avoid null pointer references * when name returned by gethostbyaddr matches no C lines * (could happen in 2.6.1a when host and servername differ). * No need to check access and do gethostbyaddr calls. * There must at least be one as we got here C line... meLazy */ (void)attach_confs_host(cptr, aconf->host, CONF_NOCONNECT_SERVER | CONF_CONNECT_SERVER); if (!find_conf_host(cptr->confs, aconf->host, CONF_NOCONNECT_SERVER) || !find_conf_host(cptr->confs, aconf->host, CONF_CONNECT_SERVER)) { sendto_ops("Host %s is not enabled for connecting:no C/N-line", aconf->host); if (by && IsPerson(by) && !MyClient(by)) sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.", me.name, by->name, cptr); det_confs_butmask(cptr, 0); #ifndef _WIN32 (void)close(cptr->fd); #else (void)closesocket(cptr->fd); #endif cptr->fd = -2; free_client(cptr); return (-1); } /* ** The socket has been connected or connect is in progress. */ (void)make_server(cptr); if (by && IsPerson(by)) { (void)strcpy(cptr->serv->by, by->name); if (cptr->serv->user) free_user(cptr->serv->user, NULL); cptr->serv->user = by->user; by->user->refcnt++; } else { (void)strcpy(cptr->serv->by, "AutoConn."); if (cptr->serv->user) free_user(cptr->serv->user, NULL); cptr->serv->user = NULL; } cptr->serv->up = me.name; if (cptr->fd > highest_fd) highest_fd = cptr->fd; local[cptr->fd] = cptr; cptr->acpt = &me; SetConnecting(cptr); IRCstats.unknown++; get_sockhost(cptr, aconf->host); add_client_to_list(cptr); nextping = TStime(); return 0; } static struct SOCKADDR *connect_inet(aconf, cptr, lenp) aConfItem *aconf; aClient *cptr; int *lenp; { static struct SOCKADDR_IN server; struct hostent *hp; /* * Might as well get sockhost from here, the connection is attempted * with it so if it fails its useless. */ cptr->fd = socket(AFINET, SOCK_STREAM, 0); if (cptr->fd >= MAXCLIENTS) { sendto_ops("No more connections allowed (%s)", cptr->name); return NULL; } mysk.SIN_PORT = 0; bzero((char *)&server, sizeof(server)); server.SIN_FAMILY = AFINET; get_sockhost(cptr, aconf->host); if (cptr->fd == -1) { report_error("opening stream socket to server %s:%s", cptr); return NULL; } get_sockhost(cptr, aconf->host); server.SIN_PORT = 0; server.SIN_ADDR = me.ip; server.SIN_FAMILY = AFINET; /* ** Bind to a local IP# (with unknown port - let unix decide) so ** we have some chance of knowing the IP# that gets used for a host ** with more than one IP#. */ /* No we don't bind it, not all OS's can handle connecting with ** an already bound socket, different ip# might occur anyway ** leading to a freezing select() on this side for some time. ** I had this on my Linux 1.1.88 --Run */ /* We do now. Virtual interface stuff --ns */ if (me.ip.S_ADDR != INADDR_ANY) if (bind(cptr->fd, (struct SOCKADDR *)&server, sizeof(server)) == -1) { report_error("error binding to local port for %s:%s", cptr); return NULL; } bzero((char *)&server, sizeof(server)); server.SIN_FAMILY = AFINET; /* * By this point we should know the IP# of the host listed in the * conf line, whether as a result of the hostname lookup or the ip# * being present instead. If we dont know it, then the connect fails. */ #ifdef INET6 if (isdigit(*aconf->host) && (AND16(aconf->ipnum.s6_addr) == 255)) if (!inet_pton(AF_INET6, aconf->host, aconf->ipnum.s6_addr)) bcopy(minus_one, aconf->ipnum.s6_addr, IN6ADDRSZ); if (AND16(aconf->ipnum.s6_addr) == 255) #else if (isdigit(*aconf->host) && (aconf->ipnum.S_ADDR == -1)) aconf->ipnum.S_ADDR = inet_addr(aconf->host); if (aconf->ipnum.S_ADDR == -1) #endif { hp = cptr->hostp; if (!hp) { Debug((DEBUG_FATAL, "%s: unknown host", aconf->host)); return NULL; } bcopy(hp->h_addr, (char *)&aconf->ipnum, sizeof(struct IN_ADDR)); } bcopy((char *)&aconf->ipnum, (char *)&server.SIN_ADDR, sizeof(struct IN_ADDR)); bcopy((char *)&aconf->ipnum, (char *)&cptr->ip, sizeof(struct IN_ADDR)); server.SIN_PORT = htons(((aconf->port > 0) ? aconf->port : portnum)); *lenp = sizeof(server); return (struct SOCKADDR *)&server; } /* ** 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 get_my_name(cptr, name, len) aClient *cptr; char *name; int len; { static char tmp[HOSTLEN + 1]; struct hostent *hp; char *cname = cptr->name; /* ** Setup local socket structure to use for binding to. */ bzero((char *)&mysk, sizeof(mysk)); mysk.SIN_FAMILY = AFINET; if (gethostname(name, len) == -1) return; name[len] = '\0'; /* assume that a name containing '.' is a FQDN */ if (!index(name, '.')) add_local_domain(name, len - strlen(name)); /* ** If hostname gives another name than cname, then check if there is ** a CNAME record for cname pointing to hostname. If so accept ** cname as our name. meLazy */ if (BadPtr(cname)) return; if ((hp = gethostbyname(cname)) || (hp = gethostbyname(name))) { char *hname; int i = 0; for (hname = hp->h_name; hname; hname = hp->h_aliases[i++]) { strncpyzt(tmp, hname, sizeof(tmp)); add_local_domain(tmp, sizeof(tmp) - strlen(tmp)); /* ** Copy the matching name over and store the ** 'primary' IP# as 'myip' which is used ** later for making the right one is used ** for connecting to other hosts. */ if (!mycmp(me.name, tmp)) break; } if (mycmp(me.name, tmp)) strncpyzt(name, hp->h_name, len); else strncpyzt(name, tmp, len); bcopy(hp->h_addr, (char *)&mysk.SIN_ADDR, sizeof(struct IN_ADDR)); Debug((DEBUG_DEBUG, "local name is %s", get_client_name(&me, TRUE))); } return; } /* * do_dns_async * * Called when the fd returned from init_resolver() has been selected for * reading. */ #ifndef NEWDNS #ifndef _WIN32 static void do_dns_async() #else void do_dns_async(id) int id; #endif { static Link ln; aClient *cptr; aConfItem *aconf; struct hostent *hp; ln.flags = -1; #ifndef _WIN32 hp = get_res((char *)&ln); #else hp = get_res((char *)&ln, id); #endif while (hp != NULL) { Debug((DEBUG_DNS, "%#x = get_res(%d,%#x)", hp, ln.flags, ln.value.cptr)); switch (ln.flags) { case ASYNC_NONE: /* * no reply was processed that was outstanding or had a client * still waiting. */ break; case ASYNC_CLIENT: if ((cptr = ln.value.cptr)) { del_queries((char *)cptr); #ifdef SHOWCONNECTINFO sendto_one(cptr, REPORT_FIN_DNS); #endif ClearDNS(cptr); if (!DoingAuth(cptr)) SetAccess(cptr); cptr->hostp = hp; } break; case ASYNC_CONNECT: aconf = ln.value.aconf; if (hp && aconf) { bcopy(hp->h_addr, (char *)&aconf->ipnum, sizeof(struct IN_ADDR)); (void)connect_server(aconf, NULL, hp); } else sendto_ops ("Connect to %s failed: host lookup", (aconf) ? aconf->host : "unknown"); break; case ASYNC_CONF: aconf = ln.value.aconf; if (hp && aconf) bcopy(hp->h_addr, (char *)&aconf->ipnum, sizeof(struct IN_ADDR)); break; case ASYNC_SERVER: cptr = ln.value.cptr; del_queries((char *)cptr); ClearDNS(cptr); if (check_server(cptr, hp, NULL, NULL, 1)) (void)exit_client(cptr, cptr, &me, "No Authorization"); break; default: break; } ln.flags = -1; #ifndef _WIN32 hp = get_res((char *)&ln); #else hp = get_res((char *)&ln, id); #endif } /* while (hp != NULL) */ } #endif /*NEWDNS*/