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unrealircd/src/res_init.c
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/*
* ++Copyright++ 1985, 1989, 1993
* -
* Copyright (c) 1985, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* -
* --Copyright--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "res.h"
#include "numeric.h"
#include "h.h"
#include "inet.h"
#include <signal.h>
#ifndef _WIN32
#include <sys/time.h>
#include <sys/socket.h>
#else
#include <sys/timeb.h>
#endif
#include "nameser.h"
#include "resolv.h"
#include <string.h>
#ifndef IRC_RESCONF
#define IRC_RESCONF "/etc/resolv.conf"
#endif
/*-------------------------------------- info about "sortlist" --------------
* Marc Majka 1994/04/16
* Allan Nathanson 1994/10/29 (BIND 4.9.3.x)
*
* NetInfo resolver configuration directory support.
*
* Allow a NetInfo directory to be created in the hierarchy which
* contains the same information as the resolver configuration file.
*
* - The local domain name is stored as the value of the "domain" property.
* - The Internet address(es) of the name server(s) are stored as values
* of the "nameserver" property.
* - The name server addresses are stored as values of the "nameserver"
* property.
* - The search list for host-name lookup is stored as values of the
* "search" property.
* - The sortlist comprised of IP address netmask pairs are stored as
* values of the "sortlist" property. The IP address and optional netmask
* should be seperated by a slash (/) or ampersand (&) character.
* - Internal resolver variables can be set from the value of the "options"
* property.
*/
#if defined(NEXT)
# define NI_PATH_RESCONF "/locations/resolver"
# define NI_TIMEOUT 10
static int ircd_netinfo_res_init(int *haveenv, int *havesearch);
#endif
static void ircd_res_setoptions(char *, char *);
#ifdef RESOLVSORT
static const char sort_mask[] = "/&";
#define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
#ifdef INET6
static u_int32_t ircd_net_mask(struct in_addr);
#else
static u_int32_t ircd_net_mask(struct in_addr);
#endif
#endif
#if !defined(isascii) /* XXX - could be a function */
# define isascii(c) (!(c & 0200))
#endif
/*
* Resolver state default settings.
*/
struct __res_state ircd_res
# if defined(__BIND_RES_TEXT)
= { RES_TIMEOUT, } /* Motorola, et al. */
# endif
;
/*
* Set up default settings. If the configuration file exist, the values
* there will have precedence. Otherwise, the server address is set to
* INADDR_ANY and the default domain name comes from the gethostname().
*
* An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
* rather than INADDR_ANY ("0.0.0.0") as the default name server address
* since it was noted that INADDR_ANY actually meant ``the first interface
* you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
* it had to be "up" in order for you to reach your own name server. It
* was later decided that since the recommended practice is to always
* install local static routes through 127.0.0.1 for all your network
* interfaces, that we could solve this problem without a code change.
*
* The configuration file should always be used, since it is the only way
* to specify a default domain. If you are running a server on your local
* machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
* in the configuration file.
*
* Copied WIN32 specific code from ircu NT port :p.
*
* Return 0 if completes successfully, -1 on error
*/
#ifdef _WIN32
extern OSVERSIONINFO VerInfo;
void get_res_from_reg_9x()
{
register char *cp, **pp, *ap;
register int n;
HKEY hKey;
char buf[BUFSIZ];
int key_len = BUFSIZ;
int key_type;
ircd_res.nscount = 0;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Services\\VxD\\MSTCP",
0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
{
Debug((DEBUG_DNS, "Error: get_res_from_reg_9x: unable to open registry key"));
return;
}
/* Retreive the Domain key */
if (RegQueryValueEx(hKey, "Domain", 0, &key_type, buf, &key_len) != ERROR_SUCCESS)
{
Debug((DEBUG_DNS, "get_res_from_reg_9x: RegQueryValueEx: Domain failed"));
}
else
strlcpy(ircd_res.defdname, buf, sizeof(ircd_res.defdname));
key_len = BUFSIZ;
/* Retreive the SearchList key */
if (RegQueryValueEx(hKey, "SearchList", 0, &key_type, buf, &key_len) != ERROR_SUCCESS)
{
Debug((DEBUG_DNS, "get_res_from_reg_9x: RegQueryValueEx: SearchList failed"));
}
else
{
cp = ircd_res.defdname;
pp = ircd_res.dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < ircd_res.dnsrch + MAXDNSRCH; cp++)
{
if (*cp == ',')
{
*cp = 0;
n = 1;
}
else if (n)
{
*pp++ = cp;
n = 0;
}
}
/* null terminate the last domain if there are excess */
while (*cp && *cp != ',')
++cp;
*cp = 0;
*pp++ = 0;
}
key_len = BUFSIZ;
/* Retreive the NameServer key */
if (RegQueryValueEx(hKey, "NameServer", 0, &key_type, buf, &key_len) != ERROR_SUCCESS)
{
Debug((DEBUG_DNS, "get_res_from_reg_9x: RegQueryValueEx: NameServer failed"));
}
else
{
struct in_addr a;
cp = ap = buf;
if (*buf != '\0')
{
do {
n = 0;
while (*cp && *cp != ',')
++cp;
if (*cp)
{
*cp = 0;
n = 1;
}
if (inet_addr(ap) != INADDR_NONE)
{
ircd_res.nsaddr_list[ircd_res.nscount].sin_addr.s_addr = inet_addr(ap);
ircd_res.nsaddr_list[ircd_res.nscount].sin_family = AF_INET;
ircd_res.nsaddr_list[ircd_res.nscount].sin_port = htons(NAMESERVER_PORT);
ircd_res.nscount++;
}
if (!n)
break;
ap = ++cp;
} while (ircd_res.nscount <= MAXNS);
}
}
RegCloseKey(hKey);
}
int get_res_nt(HKEY hKey, char *subkey, char *obuf, int *size)
{
if (RegQueryValueEx(hKey, subkey, 0, NULL, obuf, size) != ERROR_SUCCESS)
{
*size = 0;
return 0;
}
if (*size == 1)
{
*size = 0;
return 0;
}
return 1;
}
int get_res_interfaces_nt(HKEY hKey, char *subkey, char *obuf, int *size)
{
char buf[BUFSIZ];
int key_len = BUFSIZ;
int idx = 0;
FILETIME lastwrite;
HKEY hVal;
while (RegEnumKeyEx(hKey, idx++, buf, &key_len, 0, NULL, NULL, &lastwrite) != ERROR_NO_MORE_ITEMS)
{
if (RegOpenKeyEx(hKey, buf, 0, KEY_QUERY_VALUE, &hVal) != ERROR_SUCCESS)
continue;
key_len = BUFSIZ;
if (!get_res_nt(hVal, subkey, obuf, &key_len))
{
RegCloseKey(hVal);
key_len = BUFSIZ;
continue;
}
else
{
RegCloseKey(hVal);
*size = key_len;
return 1;
}
key_len = BUFSIZ;
}
*size = 0;
return 0;
}
void get_res_from_reg_nt()
{
register char *cp, **pp, *ap;
register int n;
HKEY hKey, hInter;
char buf[BUFSIZ];
int key_len = BUFSIZ;
ircd_res.nscount = 0;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Services\\Tcpip\\Parameters",
0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
{
Debug((DEBUG_DNS, "Error: get_res_from_reg_nt: unable to open registry key"));
return;
}
RegOpenKeyEx(hKey, "Interfaces", 0, KEY_QUERY_VALUE|KEY_ENUMERATE_SUB_KEYS, &hInter);
/* Retreive the Domain key */
if (!get_res_nt(hKey, "Domain", buf, &key_len))
{
key_len = BUFSIZ;
/* Try DHCP key */
if (!get_res_nt(hKey, "DhcpDomain", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "Domain", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "DhcpDomain", buf, &key_len))
{
Debug((DEBUG_DNS, "get_res_from_reg_nt: RegQueryValueEx: Domain failed"));
}
}
}
}
if (key_len > 0)
strlcpy(ircd_res.defdname, buf, sizeof(ircd_res.defdname));
/* Retreive the SearchList key */
key_len = BUFSIZ;
if (!get_res_nt(hKey, "SearchList", buf, &key_len))
{
key_len = BUFSIZ;
/* Try DHCP key */
if (!get_res_nt(hKey, "DhcpSearchList", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "SearchList", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "DhcpSearchList", buf, &key_len))
{
Debug((DEBUG_DNS, "get_res_from_reg_nt: RegQueryValueEx: SearchList failed"));
}
}
}
}
if (key_len > 0)
{
/*
* Set search list to be blank-separated strings
* on rest of line.
*/
cp = ircd_res.defdname;
pp = ircd_res.dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < ircd_res.dnsrch + MAXDNSRCH; cp++)
{
if (*cp == ' ' || *cp == '\t')
{
*cp = 0;
n = 1;
} else
if (n)
{
*pp++ = cp;
n = 0;
}
}
/* null terminate the last domain if there are excess */
while (*cp && *cp != ' ' && *cp != '\t')
++cp;
*cp = 0;
*pp++ = 0;
}
/* Retreive the NameServer key */
key_len = BUFSIZ;
if (!get_res_nt(hKey, "NameServer", buf, &key_len))
{
key_len = BUFSIZ;
/* Try DHCP key */
if (!get_res_nt(hKey, "DhcpNameServer", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "NameServer", buf, &key_len))
{
key_len = BUFSIZ;
if (!get_res_interfaces_nt(hInter, "DhcpNameServer", buf, &key_len))
{
Debug((DEBUG_DNS, "get_res_from_reg_nt: RegQueryValue: NameServer failed"));
}
}
}
}
if (key_len > 0)
{
struct in_addr a;
cp = ap = buf;
if (*buf != '\0')
{
do {
n = 0;
while (*cp && *cp != ' ' && *cp != '\t' && *cp != ',')
++cp;
if (*cp)
{
*cp = 0;
n = 1;
}
if (inet_addr(ap) != INADDR_NONE)
{
ircd_res.nsaddr_list[ircd_res.nscount].sin_addr.s_addr = inet_addr(ap);
ircd_res.nsaddr_list[ircd_res.nscount].sin_family = AF_INET;
ircd_res.nsaddr_list[ircd_res.nscount].sin_port = htons(NAMESERVER_PORT);
ircd_res.nscount++;
}
if (!n)
break;
ap = ++cp;
} while (ircd_res.nscount <= MAXNS);
}
}
RegCloseKey(hInter);
RegCloseKey(hKey);
}
#endif
int ircd_res_init(void)
{
static int initialized = 0;
#ifndef _WIN32
register FILE *fp;
#endif
register char *cp, **pp;
register int n;
char buf[MAXDNAME];
int nserv = 0; /* number of nameserver records read from file */
int haveenv = 0;
int havesearch = 0;
#ifdef RESOLVSORT
int nsort = 0;
char *net;
#endif
#ifndef RFC1535
int dots;
#endif
/* If already initialized, do nothing... */
if (initialized)
return 0;
initialized = 1;
/*
* These three fields used to be statically initialized. This made
* it hard to use this code in a shared library. It is necessary,
* now that we're doing dynamic initialization here, that we preserve
* the old semantics: if an application modifies one of these three
* fields of _res before res_init() is called, res_init() will not
* alter them. Of course, if an application is setting them to
* _zero_ before calling res_init(), hoping to override what used
* to be the static default, we can't detect it and unexpected results
* will follow. Zero for any of these fields would make no sense,
* so one can safely assume that the applications were already getting
* unexpected results.
*
* _res.options is tricky since some apps were known to diddle the bits
* before res_init() was first called. We can't replicate that semantic
* with dynamic initialization (they may have turned bits off that are
* set in RES_DEFAULT). Our solution is to declare such applications
* "broken". They could fool us by setting RES_INIT but none do (yet).
*/
if (!ircd_res.retrans)
ircd_res.retrans = RES_TIMEOUT;
if (!ircd_res.retry)
ircd_res.retry = 4;
if (!(ircd_res.options & RES_INIT))
ircd_res.options = RES_DEFAULT;
/*
* This one used to initialize implicitly to zero, so unless the app
* has set it to something in particular, we can randomize it now.
*/
if (!ircd_res.id)
ircd_res.id = ircd_res_randomid();
/*ifdef INET6 not, because of IPv4 DNS serving */
#ifdef USELOOPBACK
ircd_res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
#else
ircd_res.nsaddr.sin_addr.s_addr = INADDR_ANY;
#endif
ircd_res.nsaddr.sin_family = AF_INET;
ircd_res.nsaddr.sin_port = htons(NAMESERVER_PORT);
ircd_res.nscount = 1;
ircd_res.ndots = 1;
ircd_res.pfcode = 0;
/* Allow user to override the local domain definition */
if ((cp = getenv("LOCALDOMAIN")) != NULL)
{
strncpyzt(ircd_res.defdname, cp, sizeof(ircd_res.defdname));
haveenv++;
/*
* Set search list to be blank-separated strings
* from rest of env value. Permits users of LOCALDOMAIN
* to still have a search list, and anyone to set the
* one that they want to use as an individual (even more
* important now that the rfc1535 stuff restricts searches)
*/
cp = ircd_res.defdname;
pp = ircd_res.dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < ircd_res.dnsrch + MAXDNSRCH; cp++)
{
if (*cp == '\n') /* silly backwards compat */
break;
else if (*cp == ' ' || *cp == '\t')
{
*cp = 0;
n = 1;
}
else if (n)
{
*pp++ = cp;
n = 0;
havesearch = 1;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
cp++;
*cp = '\0';
*pp++ = 0;
}
#ifndef _WIN32
#define MATCH(line, name) \
(!strncmp(line, name, sizeof(name) - 1) && \
(line[sizeof(name) - 1] == ' ' || \
line[sizeof(name) - 1] == '\t'))
#ifdef NEXT
if (ircd_netinfo_res_init(&haveenv, &havesearch) == 0)
#endif
if ((fp = fopen(IRC_RESCONF, "r")) != NULL)
{
/* read the config file */
while (fgets(buf, sizeof(buf), fp) != NULL)
{
/* skip comments */
if (*buf == ';' || *buf == '#')
continue;
/* read default domain name */
if (MATCH(buf, "domain"))
{
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("domain") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpyzt(ircd_res.defdname, cp,
sizeof(ircd_res.defdname));
if ((cp =
strpbrk(ircd_res.defdname,
" \t\n")) != NULL)
*cp = '\0';
havesearch = 0;
continue;
}
/* set search list */
if (MATCH(buf, "search"))
{
if (haveenv) /* skip if have from environ */
continue;
cp = buf + sizeof("search") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp == '\0') || (*cp == '\n'))
continue;
strncpyzt(ircd_res.defdname, cp,
sizeof(ircd_res.defdname));
if ((cp =
strchr(ircd_res.defdname,
'\n')) != NULL)
*cp = '\0';
/*
* Set search list to be blank-separated strings
* on rest of line.
*/
cp = ircd_res.defdname;
pp = ircd_res.dnsrch;
*pp++ = cp;
for (n = 0;
*cp
&& pp < ircd_res.dnsrch + MAXDNSRCH;
cp++)
{
if (*cp == ' ' || *cp == '\t')
{
*cp = 0;
n = 1;
}
else if (n)
{
*pp++ = cp;
n = 0;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' '
&& *cp != '\t')
cp++;
*cp = '\0';
*pp++ = 0;
havesearch = 1;
continue;
}
/* read nameservers to query */
if (MATCH(buf, "nameserver") && nserv < MAXNS)
{
struct in_addr a;
cp = buf + sizeof("nameserver") - 1;
while (*cp == ' ' || *cp == '\t')
cp++;
if ((*cp != '\0') && (*cp != '\n')
&& inet_aton(cp, &a))
{
ircd_res.nsaddr_list[nserv].
sin_addr = a;
ircd_res.nsaddr_list[nserv].
sin_family = AF_INET;
ircd_res.nsaddr_list[nserv].
sin_port =
htons(NAMESERVER_PORT);
nserv++;
}
continue;
}
#ifdef RESOLVSORT
if (MATCH(buf, "sortlist"))
{
struct in_addr a;
cp = buf + sizeof("sortlist") - 1;
while (nsort < MAXRESOLVSORT)
{
while (*cp == ' '
|| *cp == '\t')
cp++;
if (*cp == '\0' || *cp == '\n'
|| *cp == ';')
break;
net = cp;
while (*cp && !ISSORTMASK(*cp)
&& *cp != ';'
&& isascii(*cp)
&& !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (inetaton(net, &a))
{
ircd_res.
sort_list[nsort].
addr = a;
if (ISSORTMASK(n))
{
*cp++ = n;
net = cp;
while (*cp
&& *cp !=
';'
&&
isascii(*cp)
&&
!isspace
(*cp))
cp++;
n = *cp;
*cp = 0;
if (inetaton
(net, &a))
{
ircd_res.
sort_list
[nsort].
mask
=
a.
s_addr;
}
else
{
ircd_res.
sort_list
[nsort].
mask
=
ircd_net_mask
(ircd_res.
sort_list
[nsort].
addr);
}
}
else
{
ircd_res.
sort_list
[nsort].
mask =
ircd_net_mask
(ircd_res.
sort_list
[nsort].
addr);
}
nsort++;
}
*cp = n;
}
continue;
}
#endif
if (MATCH(buf, "options"))
{
ircd_res_setoptions(buf +
sizeof("options") - 1, "conf");
continue;
}
}
if (nserv > 1)
ircd_res.nscount = nserv;
#ifdef RESOLVSORT
ircd_res.nsort = nsort;
#endif
(void)fclose(fp);
}
#else /* WIN32-specific code follows: */
if (VerInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
get_res_from_reg_9x();
else if (VerInfo.dwPlatformId == VER_PLATFORM_WIN32_NT)
get_res_from_reg_nt();
#endif /* WIN32 */
if (ircd_res.defdname[0] == 0 &&
gethostname(buf, sizeof(ircd_res.defdname) - 1) == 0 &&
(cp = strchr(buf, '.')) != NULL)
strlcpy(ircd_res.defdname, cp + 1, sizeof ircd_res.defdname);
/* find components of local domain that might be searched */
if (havesearch == 0)
{
pp = ircd_res.dnsrch;
*pp++ = ircd_res.defdname;
*pp = NULL;
#ifndef RFC1535
dots = 0;
for (cp = ircd_res.defdname; *cp; cp++)
dots += (*cp == '.');
cp = ircd_res.defdname;
while (pp < ircd_res.dnsrch + MAXDFLSRCH)
{
if (dots < LOCALDOMAINPARTS)
break;
cp = strchr(cp, '.') + 1; /* we know there is one */
*pp++ = cp;
dots--;
}
*pp = NULL;
#ifdef DEBUGMODE
Debug((DEBUG_DNS, ";; res_init()... default dnsrch list:"));
for (pp = ircd_res.dnsrch; *pp; pp++)
{
Debug((DEBUG_DNS, ";;\t%s", *pp));
}
Debug((DEBUG_DNS, ";;\t..END..\n"));
#endif /* DEBUG */
#endif /* !RFC1535 */
}
if ((cp = getenv("RES_OPTIONS")) != NULL)
ircd_res_setoptions(cp, "env");
ircd_res.options |= RES_INIT;
#ifdef DEBUGMODE
{
int i;
Debug((DEBUG_DNS, "res_init: %d nameserver(s):", ircd_res.nscount));
for (i=0; i < ircd_res.nscount; i++)
Debug((DEBUG_DNS, "%d. %s", i, inet_ntoa(ircd_res.nsaddr_list[i].sin_addr)));
}
#endif
return (0);
}
static void ircd_res_setoptions(char *options, char *source)
{
char *cp = options;
int i;
#ifdef DEBUGMODE
Debug((DEBUG_DNS, ";; ircd_res_setoptions(\"%s\", \"%s\")...",
options, source));
#endif
while (*cp)
{
/* skip leading and inner runs of spaces */
while (*cp == ' ' || *cp == '\t')
cp++;
/* search for and process individual options */
if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1))
{
i = atoi(cp + sizeof("ndots:") - 1);
if (i <= RES_MAXNDOTS)
ircd_res.ndots = i;
else
ircd_res.ndots = RES_MAXNDOTS;
#ifdef DEBUGMODE
Debug((DEBUG_DNS, ";;\tndots=%d", ircd_res.ndots));
#endif
}
else if (!strncmp(cp, "debug", sizeof("debug") - 1))
{
#ifdef DEBUGMODE
Debug((DEBUG_DNS,
";; ircd_res_setoptions(\"%s\", \"%s\")..",
options, source));
ircd_res.options |= RES_DEBUG;
#endif
}
else if (!strncmp(cp, "inet6", sizeof("inet6") - 1))
{
ircd_res.options |= RES_USE_INET6;
}
else
{
/* XXX - print a warning here? */
}
/* skip to next run of spaces */
while (*cp && *cp != ' ' && *cp != '\t')
cp++;
}
}
#ifdef RESOLVSORT
/* XXX - should really support CIDR which means explicit masks always. */
static u_int32_t ircd_net_mask(struct in_addr in) /* XXX - should really use system's version of this */
{
register u_int32_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return (htonl(IN_CLASSA_NET));
else if (IN_CLASSB(i))
return (htonl(IN_CLASSB_NET));
return (htonl(IN_CLASSC_NET));
}
#endif
#ifdef NEXT
static int ircd_netinfo_res_init(int *haveenv, int *havesearch)
{
register int n;
void *domain, *parent;
ni_id dir;
ni_status status;
ni_namelist nl;
int nserv = 0;
#ifdef RESOLVSORT
int nsort = 0;
#endif
status = ni_open(NULL, ".", &domain);
if (status == NI_OK)
{
ni_setreadtimeout(domain, NI_TIMEOUT);
ni_setabort(domain, 1);
/* climb the NetInfo hierarchy to find a resolver directory */
while (status == NI_OK)
{
status = ni_pathsearch(domain, &dir, NI_PATH_RESCONF);
if (status == NI_OK)
{
/* found a resolver directory */
if (*haveenv == 0)
{
/* get the default domain name */
status =
ni_lookupprop(domain, &dir,
"domain", &nl);
if (status == NI_OK
&& nl.ni_namelist_len > 0)
{
(void)strncpy(ircd_res.defdname,
nl.ni_namelist_val[0],
sizeof(ircd_res.defdname) -
1);
ircd_res.
defdname[sizeof(ircd_res.
defdname) - 1] = '\0';
ni_namelist_free(&nl);
*havesearch = 0;
}
/* get search list */
status =
ni_lookupprop(domain, &dir,
"search", &nl);
if (status == NI_OK
&& nl.ni_namelist_len > 0)
{
(void)strncpy(ircd_res.defdname,
nl.ni_namelist_val[0],
sizeof(ircd_res.defdname) -
1);
ircd_res.
defdname[sizeof(ircd_res.
defdname) - 1] = '\0';
/* copy */
for (n = 0;
n < nl.ni_namelist_len
&& n < MAXDNSRCH; n++)
{
/* duplicate up to MAXDNSRCH servers */
char *cp =
nl.
ni_namelist_val[n];
ircd_res.dnsrch[n] =
strcpy((char *)
malloc(strlen(cp) +
1), cp);
}
ni_namelist_free(&nl);
*havesearch = 1;
}
}
/* get list of nameservers */
status =
ni_lookupprop(domain, &dir, "nameserver",
&nl);
if (status == NI_OK && nl.ni_namelist_len > 0)
{
/* copy up to MAXNS servers */
for (n = 0;
n < nl.ni_namelist_len
&& nserv < MAXNS; n++)
{
struct in_addr a;
if (inetaton(nl.
ni_namelist_val[n], &a))
{
ircd_res.
nsaddr_list[nserv].
sin_addr = a;
ircd_res.
nsaddr_list[nserv].
sin_family =
AF_INET;
ircd_res.
nsaddr_list[nserv].
sin_port =
htons
(NAMESERVER_PORT);
nserv++;
}
}
ni_namelist_free(&nl);
}
if (nserv > 1)
ircd_res.nscount = nserv;
#ifdef RESOLVSORT
/* get sort order */
status =
ni_lookupprop(domain, &dir, "sortlist",
&nl);
if (status == NI_OK && nl.ni_namelist_len > 0)
{
/* copy up to MAXRESOLVSORT address/netmask pairs */
for (n = 0;
n < nl.ni_namelist_len
&& nsort < MAXRESOLVSORT; n++)
{
char ch;
char *cp;
const char *sp;
struct in_addr a;
cp = NULL;
for (sp = sort_mask; *sp; sp++)
{
char *cp1;
cp1 =
strchr(nl.
ni_namelist_val[n],
*sp);
if (cp && cp1)
cp = (cp <
cp1) ? cp :
cp1;
else if (cp1)
cp = cp1;
}
if (cp != NULL)
{
ch = *cp;
*cp = '\0';
break;
}
if (inetaton(nl.
ni_namelist_val[n], &a))
{
ircd_res.
sort_list[nsort].
addr = a;
if (*cp
&& ISSORTMASK(ch))
{
*cp++ = ch;
if (inetaton(cp,
&a))
{
ircd_res.
sort_list
[nsort].
mask
=
a.
s_addr;
}
else
{
ircd_res.
sort_list
[nsort].
mask
=
ircd_net_mask
(ircd_res.
sort_list
[nsort].
addr);
}
}
else
{
ircd_res.
sort_list
[nsort].
mask =
ircd_net_mask
(ircd_res.
sort_list
[nsort].
addr);
}
nsort++;
}
}
ni_namelist_free(&nl);
}
ircd_res.nsort = nsort;
#endif
/* get resolver options */
status =
ni_lookupprop(domain, &dir, "options", &nl);
if (status == NI_OK && nl.ni_namelist_len > 0)
{
ircd_res_setoptions(nl.
ni_namelist_val[0], "conf");
ni_namelist_free(&nl);
}
ni_free(domain);
return (1); /* using DNS configuration from NetInfo */
}
status = ni_open(domain, "..", &parent);
ni_free(domain);
if (status == NI_OK)
domain = parent;
}
}
return (0); /* if not using DNS configuration from NetInfo */
}
#endif /* NEXT */
u_int ircd_res_randomid()
{
#ifndef _WIN32
struct timeval now;
gettimeofday(&now, NULL);
return (0xffff & (now.tv_sec ^ now.tv_usec ^ getpid()));
#else
struct _timeb now;
_ftime(&now);
return (0xffff & (now.time ^ now.millitm ^ getpid()));
#endif
}
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