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unrealircd/src/s_bsd.c
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/*
/*
* 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 <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#else
#include <io.h>
#endif
#if defined(_SOLARIS)
#include <sys/filio.h>
#endif
#include "inet.h"
#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#ifdef AIX
# include <time.h>
# include <arpa/nameser.h>
#else
# include "nameser.h"
#endif
#include "resolv.h"
#include "sock.h" /* If FD_ZERO isn't define up to this point, */
#include <string.h>
#include "proto.h"
/* define it (BSD4.2 needs this) */
#include "h.h"
#ifndef NO_FDLIST
#include "fdlist.h"
#endif
#ifdef USE_POLL
#include <sys/poll.h>
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*/
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