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[master] added DLZ Perl module

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3602.	[contrib]	Added DLZ Perl module, allowing Perl scripts to
			integrate with named and serve DNS data.
			(Contributed by John Eaglesham of Yahoo.)
This commit is contained in:
Evan Hunt
2013-06-24 23:08:26 -07:00
parent 1761ecb90f
commit 3b9ba6bd74
8 changed files with 1146 additions and 0 deletions
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4
CHANGES
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@@ -1,3 +1,7 @@
3602. [contrib] Added DLZ Perl module, allowing Perl scripts to
integrate with named and serve DNS data.
(Contributed by John Eaglesham of Yahoo.)
3601. [bug] Added to PKCS#11 openssl patches a value len 3601. [bug] Added to PKCS#11 openssl patches a value len
attribute in DH derive key. [RT #33928] attribute in DH derive key. [RT #33928]

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contrib/dlz/modules/perl/README Normal file
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BIND 9 DLZ Perl module (bind-dlz-tools)
Written by John Eaglesham <johneagl@yahoo-inc.com>
A dynamically loadable zone (DLZ) plugin embedding a Perl
interpreter in BIND, allowing Perl scripts to be written to
integrate with BIND and serve DNS data.
More information/updates at http://bind-dlz-tools.sourceforge.net/

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contrib/dlz/modules/perl/dlz_perl_callback.xs Normal file
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/*
* Copyright (C) 2012 John Eaglesham
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND JOHN EAGLESHAM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* JOHN EAGLESHAM 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.
*/
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "dlz_perl_driver.h"
#include <dlz_minimal.h>
/* And some XS code. */
MODULE = DLZ_Perl PACKAGE = DLZ_Perl
int
LOG_INFO()
CODE:
RETVAL = ISC_LOG_INFO;
OUTPUT:
RETVAL
int
LOG_NOTICE()
CODE:
RETVAL = ISC_LOG_NOTICE;
OUTPUT:
RETVAL
int
LOG_WARNING()
CODE:
RETVAL = ISC_LOG_WARNING;
OUTPUT:
RETVAL
int
LOG_ERROR()
CODE:
RETVAL = ISC_LOG_ERROR;
OUTPUT:
RETVAL
int
LOG_CRITICAL()
CODE:
RETVAL = ISC_LOG_CRITICAL;
OUTPUT:
RETVAL
void
log(opaque, level, msg)
IV opaque
int level
char *msg
PREINIT:
log_t *log = (log_t *) opaque;
CODE:
log( level, msg );

81
contrib/dlz/modules/perl/dlz_perl_callback_clientinfo.xs Normal file
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/*
* Copyright (C) 2012 John Eaglesham
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND JOHN EAGLESHAM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* JOHN EAGLESHAM 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.
*/
#define ADDR_BUF_LEN INET6_ADDRSTRLEN
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "dlz_perl_driver.h"
#include <dlz_minimal.h>
/* And some XS code. */
MODULE = DLZ_Perl::clientinfo PACKAGE = DLZ_Perl::clientinfo
PROTOTYPES: DISABLE
void
sourceip(opaque)
SV *opaque
PREINIT:
const char *ret;
char addr_buf[ADDR_BUF_LEN];
int port;
isc_sockaddr_t *src;
dlz_perl_clientinfo_opaque *ci;
I32 wantarray = GIMME_V;
PPCODE:
if (!SvTRUE(opaque) || !SvIOK(opaque)) XSRETURN_EMPTY;
/*
* Safe, because Perl guarantees that an IV (the type we
* pass into DLZ functions who pass it here) is able to
* hold a pointer.
*/
ci = (dlz_perl_clientinfo_opaque *) SvIV(opaque);
if (wantarray == G_VOID || ci->methods == NULL ||
ci->methods->version - ci->methods->age <
DNS_CLIENTINFOMETHODS_VERSION)
XSRETURN_EMPTY;
ci->methods->sourceip(ci->clientinfo, &src);
switch (src->type.sa.sa_family) {
case AF_INET:
port = ntohs(src->type.sin.sin_port);
ret = inet_ntop(AF_INET,
&src->type.sin.sin_addr,
addr_buf, ADDR_BUF_LEN);
break;
case AF_INET6:
port = ntohs(src->type.sin6.sin6_port);
ret = inet_ntop(AF_INET6,
&src->type.sin6.sin6_addr,
addr_buf, ADDR_BUF_LEN);
break;
default:
ret = NULL;
}
if (ret == NULL) XSRETURN_EMPTY;
XPUSHs(sv_2mortal(newSVpv(addr_buf, strlen(addr_buf))));
if (wantarray == G_ARRAY) XPUSHs(sv_2mortal(newSViv(port)));

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contrib/dlz/modules/perl/dlz_perl_driver.c Normal file
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/*
* Copyright (C) 2002 Stichting NLnet, Netherlands, stichting@nlnet.nl.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND STICHTING NLNET
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* STICHTING NLNET 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.
*
* The development of Dynamically Loadable Zones (DLZ) for Bind 9 was
* conceived and contributed by Rob Butler.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ROB BUTLER
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* ROB BUTLER 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 (C) 1999-2001 Internet Software Consortium.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* INTERNET SOFTWARE CONSORTIUM 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 (C) 2009-2012 John Eaglesham
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND JOHN EAGLESHAM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* JOHN EAGLESHAM 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.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <EXTERN.h>
#include <perl.h>
#include <dlz_minimal.h>
#include "dlz_perl_driver.h"
/* Enable debug logging? */
#if 0
#define carp(...) cd->log(ISC_LOG_INFO, __VA_ARGS__);
#else
#define carp(...)
#endif
#ifndef MULTIPLICITY
/* This is a pretty terrible work-around for handling HUP/rndc reconfig, but
* the way BIND/DLZ handles reloads causes it to create a second back end
* before removing the first. In the case of a single global interpreter,
* serious problems arise. We can hack around this, but it's much better to do
* it properly and link against a perl compiled with multiplicity. */
static PerlInterpreter *global_perl = NULL;
static int global_perl_dont_free = 0;
#endif
typedef struct config_data {
PerlInterpreter *perl;
char *perl_source;
SV *perl_class;
/* Functions given to us by bind9 */
log_t *log;
dns_sdlz_putrr_t *putrr;
dns_sdlz_putnamedrr_t *putnamedrr;
dns_dlz_writeablezone_t *writeable_zone;
} config_data_t;
/* Note, this code generates warnings due to lost type qualifiers. This code
* is (almost) verbatim from perlembed, and is known to work correctly despite
* the warnings.
*/
EXTERN_C void xs_init (pTHX);
EXTERN_C void boot_DynaLoader (pTHX_ CV* cv);
EXTERN_C void boot_DLZ_Perl__clientinfo (pTHX_ CV* cv);
EXTERN_C void boot_DLZ_Perl (pTHX_ CV* cv);
EXTERN_C void
xs_init(pTHX)
{
char *file = __FILE__;
dXSUB_SYS;
/* DynaLoader is a special case */
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
newXS("DLZ_Perl::clientinfo::bootstrap", boot_DLZ_Perl__clientinfo, file);
newXS("DLZ_Perl::bootstrap", boot_DLZ_Perl, file);
}
/*
* methods
*/
/*
* remember a helper function, from the bind9 dlz_dlopen driver
*/
static void b9_add_helper(config_data_t *state,
const char *helper_name, void *ptr)
{
if (strcmp(helper_name, "log") == 0)
state->log = ptr;
if (strcmp(helper_name, "putrr") == 0)
state->putrr = ptr;
if (strcmp(helper_name, "putnamedrr") == 0)
state->putnamedrr = ptr;
if (strcmp(helper_name, "writeable_zone") == 0)
state->writeable_zone = ptr;
}
int dlz_version(unsigned int *flags) {
return DLZ_DLOPEN_VERSION;
}
isc_result_t dlz_allnodes(const char *zone, void *dbdata,
dns_sdlzallnodes_t *allnodes)
{
config_data_t *cd = (config_data_t *) dbdata;
isc_result_t retval;
int rrcount, r;
SV *record_ref;
SV **rr_name;
SV **rr_type;
SV **rr_ttl;
SV **rr_data;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl = cd->perl;
#endif
dSP;
PERL_SET_CONTEXT(cd->perl);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(cd->perl_class);
XPUSHs(sv_2mortal(newSVpv(zone, 0)));
PUTBACK;
carp("DLZ Perl: Calling allnodes for zone %s", zone);
rrcount = call_method("allnodes", G_ARRAY|G_EVAL);
carp("DLZ Perl: Call to allnodes returned rrcount of %i", rrcount);
SPAGAIN;
if (SvTRUE(ERRSV)) {
POPs;
cd->log(ISC_LOG_ERROR, "DLZ Perl: allnodes for zone %s died in eval: %s", zone, SvPV_nolen(ERRSV));
retval = ISC_R_FAILURE;
goto CLEAN_UP_AND_RETURN;
}
if (!rrcount) {
retval = ISC_R_NOTFOUND;
goto CLEAN_UP_AND_RETURN;
}
retval = ISC_R_SUCCESS;
r = 0;
while (r++ < rrcount) {
record_ref = POPs;
if (
(!SvROK(record_ref)) ||
(SvTYPE(SvRV(record_ref)) != SVt_PVAV)
) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl: allnodes for zone %s "
"returned an invalid value "
"(expected array of arrayrefs)",
zone);
retval = ISC_R_FAILURE;
break;
}
record_ref = SvRV(record_ref);
rr_name = av_fetch((AV *) record_ref, 0, 0);
rr_type = av_fetch((AV *) record_ref, 1, 0);
rr_ttl = av_fetch((AV *) record_ref, 2, 0);
rr_data = av_fetch((AV *) record_ref, 3, 0);
if (rr_name == NULL || rr_type == NULL ||
rr_ttl == NULL || rr_data == NULL)
{
cd->log(ISC_LOG_ERROR,
"DLZ Perl: allnodes for zone %s "
"returned an array that was missing data",
zone);
retval = ISC_R_FAILURE;
break;
}
carp("DLZ Perl: Got record %s/%s = %s",
SvPV_nolen(*rr_name), SvPV_nolen(*rr_type),
SvPV_nolen(*rr_data));
retval = cd->putnamedrr(allnodes,
SvPV_nolen(*rr_name),
SvPV_nolen(*rr_type),
SvIV(*rr_ttl), SvPV_nolen(*rr_data));
if (retval != ISC_R_SUCCESS) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl: putnamedrr in allnodes "
"for zone %s failed with code %i "
"(did lookup return invalid record data?)",
zone, retval);
break;
}
}
CLEAN_UP_AND_RETURN:
PUTBACK;
FREETMPS;
LEAVE;
carp("DLZ Perl: Returning from allnodes, r = %i, retval = %i",
r, retval);
return (retval);
}
isc_result_t
dlz_allowzonexfr(void *dbdata, const char *name, const char *client) {
config_data_t *cd = (config_data_t *) dbdata;
int r;
isc_result_t retval;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl = cd->perl;
#endif
dSP;
PERL_SET_CONTEXT(cd->perl);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(cd->perl_class);
XPUSHs(sv_2mortal(newSVpv(name, 0)));
XPUSHs(sv_2mortal(newSVpv(client, 0)));
PUTBACK;
r = call_method("allowzonexfr", G_SCALAR|G_EVAL);
SPAGAIN;
if (SvTRUE(ERRSV)) {
/*
* On error there's an undef at the top of the stack. Pop
* it away so we don't leave junk on the stack for the next
* caller.
*/
POPs;
cd->log(ISC_LOG_ERROR,
"DLZ Perl: allowzonexfr died in eval: %s",
SvPV_nolen(ERRSV));
retval = ISC_R_FAILURE;
} else if (r == 0) {
/* Client returned nothing -- zone not found. */
retval = ISC_R_NOTFOUND;
} else if (r > 1) {
/* Once again, clean out the stack when possible. */
while (r--) POPi;
cd->log(ISC_LOG_ERROR,
"DLZ Perl: allowzonexfr returned too many parameters!");
retval = ISC_R_FAILURE;
} else {
/*
* Client returned true/false -- we're authoritative for
* the zone.
*/
r = POPi;
if (r)
retval = ISC_R_SUCCESS;
else
retval = ISC_R_NOPERM;
}
PUTBACK;
FREETMPS;
LEAVE;
return (retval);
}
#if DLZ_DLOPEN_VERSION < 3
isc_result_t
dlz_findzonedb(void *dbdata, const char *name)
#else
isc_result_t
dlz_findzonedb(void *dbdata, const char *name,
dns_clientinfomethods_t *methods,
dns_clientinfo_t *clientinfo)
#endif
{
config_data_t *cd = (config_data_t *) dbdata;
int r;
isc_result_t retval;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl = cd->perl;
#endif
#if DLZ_DLOPEN_VERSION >= 3
UNUSED(methods);
UNUSED(clientinfo);
#endif
dSP;
carp("DLZ Perl: findzone looking for '%s'", name);
PERL_SET_CONTEXT(cd->perl);
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(cd->perl_class);
XPUSHs(sv_2mortal(newSVpv(name, 0)));
PUTBACK;
r = call_method("findzone", G_SCALAR|G_EVAL);
SPAGAIN;
if (SvTRUE(ERRSV)) {
/*
* On error there's an undef at the top of the stack. Pop
* it away so we don't leave junk on the stack for the next
* caller.
*/
POPs;
cd->log(ISC_LOG_ERROR,
"DLZ Perl: findzone died in eval: %s",
SvPV_nolen(ERRSV));
retval = ISC_R_FAILURE;
} else if (r == 0) {
retval = ISC_R_FAILURE;
} else if (r > 1) {
/* Once again, clean out the stack when possible. */
while (r--) POPi;
cd->log(ISC_LOG_ERROR,
"DLZ Perl: findzone returned too many parameters!");
retval = ISC_R_FAILURE;
} else {
r = POPi;
if (r)
retval = ISC_R_SUCCESS;
else
retval = ISC_R_NOTFOUND;
}
PUTBACK;
FREETMPS;
LEAVE;
return (retval);
}
#if DLZ_DLOPEN_VERSION == 1
isc_result_t
dlz_lookup(const char *zone, const char *name,
void *dbdata, dns_sdlzlookup_t *lookup)
#else
isc_result_t
dlz_lookup(const char *zone, const char *name,
void *dbdata, dns_sdlzlookup_t *lookup,
dns_clientinfomethods_t *methods,
dns_clientinfo_t *clientinfo)
#endif
{
isc_result_t retval;
config_data_t *cd = (config_data_t *) dbdata;
int rrcount, r;
dlz_perl_clientinfo_opaque opaque;
SV *record_ref;
SV **rr_type;
SV **rr_ttl;
SV **rr_data;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl = cd->perl;
#endif
#if DLZ_DLOPEN_VERSION >= 2
UNUSED(methods);
UNUSED(clientinfo);
#endif
dSP;
PERL_SET_CONTEXT(cd->perl);
ENTER;
SAVETMPS;
opaque.methods = methods;
opaque.clientinfo = clientinfo;
PUSHMARK(SP);
XPUSHs(cd->perl_class);
XPUSHs(sv_2mortal(newSVpv(name, 0)));
XPUSHs(sv_2mortal(newSVpv(zone, 0)));
XPUSHs(sv_2mortal(newSViv((IV)&opaque)));
PUTBACK;
carp("DLZ Perl: Searching for name %s in zone %s", name, zone);
rrcount = call_method("lookup", G_ARRAY|G_EVAL);
carp("DLZ Perl: Call to lookup returned %i", rrcount);
SPAGAIN;
if (SvTRUE(ERRSV)) {
POPs;
cd->log(ISC_LOG_ERROR, "DLZ Perl: lookup died in eval: %s",
SvPV_nolen(ERRSV));
retval = ISC_R_FAILURE;
goto CLEAN_UP_AND_RETURN;
}
if (!rrcount) {
retval = ISC_R_NOTFOUND;
goto CLEAN_UP_AND_RETURN;
}
retval = ISC_R_SUCCESS;
r = 0;
while (r++ < rrcount) {
record_ref = POPs;
if ((!SvROK(record_ref)) ||
(SvTYPE(SvRV(record_ref)) != SVt_PVAV))
{
cd->log(ISC_LOG_ERROR,
"DLZ Perl: lookup returned an "
"invalid value (expected array of arrayrefs)!");
retval = ISC_R_FAILURE;
break;
}
record_ref = SvRV(record_ref);
rr_type = av_fetch((AV *) record_ref, 0, 0);
rr_ttl = av_fetch((AV *) record_ref, 1, 0);
rr_data = av_fetch((AV *) record_ref, 2, 0);
if (rr_type == NULL || rr_ttl == NULL || rr_data == NULL) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl: lookup for record %s in "
"zone %s returned an array that was "
"missing data", name, zone);
retval = ISC_R_FAILURE;
break;
}
carp("DLZ Perl: Got record %s = %s",
SvPV_nolen(*rr_type), SvPV_nolen(*rr_data));
retval = cd->putrr(lookup, SvPV_nolen(*rr_type),
SvIV(*rr_ttl), SvPV_nolen(*rr_data));
if (retval != ISC_R_SUCCESS) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl: putrr for lookup of %s in "
"zone %s failed with code %i "
"(did lookup return invalid record data?)",
name, zone, retval);
break;
}
}
CLEAN_UP_AND_RETURN:
PUTBACK;
FREETMPS;
LEAVE;
carp("DLZ Perl: Returning from lookup, r = %i, retval = %i", r, retval);
return (retval);
}
const char *
#ifdef MULTIPLICITY
missing_perl_method(const char *perl_class_name, PerlInterpreter *my_perl)
#else
missing_perl_method(const char *perl_class_name)
#endif
{
const int BUF_LEN = 64; /* Should be big enough, right? hah */
char full_name[BUF_LEN];
const char *methods[] = { "new", "findzone", "lookup", NULL };
int i = 0;
while( methods[i] != NULL ) {
snprintf(full_name, BUF_LEN, "%s::%s",
perl_class_name, methods[i]);
if (get_cv(full_name, 0) == NULL) {
return methods[i];
}
i++;
}
return (NULL);
}
isc_result_t
dlz_create(const char *dlzname, unsigned int argc, char *argv[],
void **dbdata, ...)
{
config_data_t *cd;
char *init_args[] = { NULL, NULL };
char *perlrun[] = { "", NULL, "dlz perl", NULL };
char *perl_class_name;
int r;
va_list ap;
const char *helper_name;
const char *missing_method_name;
char *call_argv_args = NULL;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl;
#endif
cd = malloc(sizeof(config_data_t));
if (cd == NULL)
return (ISC_R_NOMEMORY);
memset(cd, 0, sizeof(config_data_t));
/* fill in the helper functions */
va_start(ap, dbdata);
while ((helper_name = va_arg(ap, const char *)) != NULL) {
b9_add_helper(cd, helper_name, va_arg(ap, void*));
}
va_end(ap);
if (argc < 2) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': Missing script argument.",
dlzname);
return (ISC_R_FAILURE);
}
if (argc < 3) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': Missing class name argument.",
dlzname);
return (ISC_R_FAILURE);
}
perl_class_name = argv[2];
cd->log(ISC_LOG_INFO, "DLZ Perl '%s': Loading '%s' from location '%s'",
dlzname, perl_class_name, argv[1], argc);
#ifndef MULTIPLICITY
if (global_perl) {
/*
* PERL_SET_CONTEXT not needed here as we're guaranteed to
* have an implicit context thanks to an undefined
* MULTIPLICITY.
*/
PL_perl_destruct_level = 1;
perl_destruct(global_perl);
perl_free(global_perl);
global_perl = NULL;
global_perl_dont_free = 1;
}
#endif
cd->perl = perl_alloc();
if (cd->perl == NULL) {
free(cd);
return (ISC_R_FAILURE);
}
#ifdef MULTIPLICITY
my_perl = cd->perl;
#endif
PERL_SET_CONTEXT(cd->perl);
/*
* We will re-create the interpreter during an rndc reconfig, so we
* must set this variable per perlembed in order to insure we can
* clean up Perl at a later time.
*/
PL_perl_destruct_level = 1;
perl_construct(cd->perl);
PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
/* Prevent crashes from clients writing to $0 */
PL_origalen = 1;
cd->perl_source = strdup(argv[1]);
if (cd->perl_source == NULL) {
free(cd);
return (ISC_R_NOMEMORY);
}
perlrun[1] = cd->perl_source;
if (perl_parse(cd->perl, xs_init, 3, perlrun, (char **)NULL)) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': Failed to parse Perl script, aborting",
dlzname);
goto CLEAN_UP_PERL_AND_FAIL;
}
/* Let Perl know about our callbacks. */
call_argv("DLZ_Perl::clientinfo::bootstrap",
G_DISCARD|G_NOARGS, &call_argv_args);
call_argv("DLZ_Perl::bootstrap",
G_DISCARD|G_NOARGS, &call_argv_args);
/*
* Run the script. We don't really need to do this since we have
* the init callback, but there's not really a downside either.
*/
if (perl_run(cd->perl)) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': Script exited with an error, aborting",
dlzname);
goto CLEAN_UP_PERL_AND_FAIL;
}
#ifdef MULTIPLICITY
if (missing_method_name = missing_perl_method(perl_class_name, my_perl))
#else
if (missing_method_name = missing_perl_method(perl_class_name))
#endif
{
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': Missing required function '%s', "
"aborting", dlzname, missing_method_name);
goto CLEAN_UP_PERL_AND_FAIL;
}
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newSVpv(perl_class_name, 0)));
/* Build flattened hash of config info. */
XPUSHs(sv_2mortal(newSVpv("log_context", 0)));
XPUSHs(sv_2mortal(newSViv((IV)cd->log)));
/* Argument to pass to new? */
if (argc == 4) {
XPUSHs(sv_2mortal(newSVpv("argv", 0)));
XPUSHs(sv_2mortal(newSVpv(argv[3], 0)));
}
PUTBACK;
r = call_method("new", G_EVAL|G_SCALAR);
SPAGAIN;
if (r) cd->perl_class = SvREFCNT_inc(POPs);
PUTBACK;
FREETMPS;
LEAVE;
if (SvTRUE(ERRSV)) {
POPs;
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': new died in eval: %s",
dlzname, SvPV_nolen(ERRSV));
goto CLEAN_UP_PERL_AND_FAIL;
}
if (!r || !sv_isobject(cd->perl_class)) {
cd->log(ISC_LOG_ERROR,
"DLZ Perl '%s': new failed to return a blessed object",
dlzname);
goto CLEAN_UP_PERL_AND_FAIL;
}
*dbdata = cd;
#ifndef MULTIPLICITY
global_perl = cd->perl;
#endif
return (ISC_R_SUCCESS);
CLEAN_UP_PERL_AND_FAIL:
PL_perl_destruct_level = 1;
perl_destruct(cd->perl);
perl_free(cd->perl);
free(cd->perl_source);
free(cd);
return (ISC_R_FAILURE);
}
void dlz_destroy(void *dbdata) {
config_data_t *cd = (config_data_t *) dbdata;
#ifdef MULTIPLICITY
PerlInterpreter *my_perl = cd->perl;
#endif
cd->log(ISC_LOG_INFO, "DLZ Perl: Unloading driver.");
#ifndef MULTIPLICITY
if (!global_perl_dont_free) {
#endif
PERL_SET_CONTEXT(cd->perl);
PL_perl_destruct_level = 1;
perl_destruct(cd->perl);
perl_free(cd->perl);
#ifndef MULTIPLICITY
global_perl_dont_free = 0;
global_perl = NULL;
}
#endif
free(cd->perl_source);
free(cd);
}

24
contrib/dlz/modules/perl/dlz_perl_driver.h Normal file
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@@ -0,0 +1,24 @@
/*
* Copyright (C) 2009-2012 John Eaglesham
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND JOHN EAGLESHAM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* JOHN EAGLESHAM 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.
*/
#include <dlz_minimal.h>
/* This is the only part that differs from dlz_minimal.h. */
typedef struct dlz_perl_clientinfo_opaque {
dns_clientinfomethods_t *methods;
dns_clientinfo_t *clientinfo;
} dlz_perl_clientinfo_opaque;

177
contrib/dlz/modules/perl/testing/dlz_perl_example.pm Normal file
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#
# Copyright (C) 2009-2012 John Eaglesham
#
# 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.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND JOHN EAGLESHAM
# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
# JOHN EAGLESHAM 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.
#
package dlz_perl_example;
use warnings;
use strict;
use Data::Dumper;
$Data::Dumper::Sortkeys = 1;
# Constructor. Everything after the class name can be folded into a hash of
# various options and settings. Right now only log_context and argv are
# available.
sub new {
my ( $class, %config ) = @_;
my $self = {};
bless $self, $class;
$self->{log} = sub {
my ( $level, $msg ) = @_;
DLZ_Perl::log( $config{log_context}, $level, $msg );
};
if ( $config{argv} ) { warn "Got argv: $config{argv}\n"; }
$self->{zones} = {
'example.com' => {
'@' => [
{
type => 'SOA',
ttl => 86400,
data =>
'ns1.example.com. hostmaster.example.com. 12345 172800 900 1209600 3600',
}
],
perlrr => [
{
type => 'A',
ttl => 444,
data => '1.1.1.1',
},
{
type => 'A',
ttl => 444,
data => '1.1.1.2',
}
],
perltime => [
{
code => sub {
return ['TXT', '1', time()];
},
},
],
sourceip => [
{
code => sub {
my ( $opaque ) = @_;
# Passing anything other than the proper opaque value,
# 0, or undef to this function will cause a crash (at
# best!).
my ( $addr, $port ) =
DLZ_Perl::clientinfo::sourceip( $opaque );
if ( !$addr ) { $addr = $port = 'unknown'; }
return ['TXT', '1', $addr], ['TXT', '1', $port];
},
},
],
},
};
$self->{log}->(
DLZ_Perl::LOG_INFO(),
'DLZ Perl Script: Called init. Loaded zone data: '
. Dumper( $self->{zones} )
);
return $self;
}
# Do we have data for this zone? Expects a simple true or false return value.
sub findzone {
my ( $self, $zone ) = @_;
$self->{log}->(
DLZ_Perl::LOG_INFO(),
"DLZ Perl Script: Called findzone, looking for zone $zone"
);
return exists $self->{zones}->{$zone};
}
# Return the data for a given record in a given zone. The final parameter is
# an opaque value that can be passed to DLZ_Perl::clientinfo::sourceip to
# retrieve the client source IP and port. Expected return value is an array
# of array refs, with each array ref representing one record and containing
# the type, ttl, and data in that order. Data is as it appears in a zone file.
sub lookup {
my ( $self, $name, $zone, $client_info ) = @_;
$self->{log}->(
DLZ_Perl::LOG_INFO(),
"DLZ Perl Script: Called lookup, looking for record $name in zone $zone"
);
return unless $self->{zones}->{$zone}->{$name};
my @results;
foreach my $rr ( @{ $self->{zones}->{$zone}->{$name} } ) {
if ( $rr->{'code'} ) {
my @r = $rr->{'code'}->( $client_info );
if ( @r ) {
push @results, @r;
}
} else {
push @results, [$rr->{'type'}, $rr->{'ttl'}, $rr->{'data'}];
}
}
return @results;
}
# Will we allow zone transfer for this client? Expects a simple true or false
# return value.
sub allowzonexfr {
my ( $self, $zone, $client ) = @_;
$self->{log}->(
DLZ_Perl::LOG_INFO(),
"DLZ Perl Script: Called allowzonexfr, looking for zone $zone for " .
"client $client"
);
if ( $client eq '127.0.0.1' ) { return 1; }
return 0;
}
# Note the return AoA for this method differs from lookup in that it must
# return the name of the record as well as the other data.
sub allnodes {
my ( $self, $zone ) = @_;
my @results;
$self->{log}->(
DLZ_Perl::LOG_INFO(),
"DLZ Perl Script: Called allnodes, looking for zone $zone"
);
foreach my $name ( keys %{ $self->{zones}->{$zone} } ) {
foreach my $rr ( @{ $self->{zones}->{$zone}->{$name} } ) {
if ( $rr->{'code'} ) {
my @r = $rr->{'code'}->();
# The code returns an array of array refs without the name.
# This makes things easy for lookup but hard here. We must
# iterate over each array ref and inject the name into it.
foreach my $a ( @r ) {
unshift @{$a}, $name;
}
push @results, @r;
} else {
push @results,
[$name, $rr->{'type'}, $rr->{'ttl'}, $rr->{'data'}];
}
}
}
return @results;
}
1;

31
contrib/dlz/modules/perl/testing/named.conf Normal file
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/*
* Copyright (C) 2011 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
/* $Id: named.conf.in,v 1.1.4.3 2011-03-10 23:47:29 tbox Exp $ */
options {
port 5300;
pid-file "named.pid";
session-keyfile "session.key";
listen-on { 127.0.0.1; };
listen-on-v6 { none; };
recursion no;
notify no;
};
dlz "perl zone" {
database "dlopen ../dlz_perl_driver.so dlz_perl_example.pm dlz_perl_example";
};