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/*
* Copyright(c) 2009 by Internet Systems Consortium, Inc.("ISC")
*
* 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 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.
*
* Internet Systems Consortium, Inc.
* 950 Charter Street
* Redwood City, CA 94063
* <info@isc.org>
* http://www.isc.org/
*
*/
/*Trying to figure out what we need to define to get things to work.
It looks like we want/need the export library but need the fdwatchcommand
which may be a problem */
#include "dhcpd.h"
#include <sys/time.h>
dhcp_context_t dhcp_gbl_ctx;
void
isclib_cleanup(void)
{
#if defined (NSUPDATE)
if (dhcp_gbl_ctx.dnsclient != NULL)
dns_client_destroy((dns_client_t **)&dhcp_gbl_ctx.dnsclient);
#endif
if (dhcp_gbl_ctx.task != NULL) {
// isc_task_destroy(&dhcp_gbl_ctx.task);
isc_task_shutdown(dhcp_gbl_ctx.task);
isc_task_detach(&dhcp_gbl_ctx.task);
}
if (dhcp_gbl_ctx.timermgr != NULL)
isc_timermgr_destroy(&dhcp_gbl_ctx.timermgr);
if (dhcp_gbl_ctx.socketmgr != NULL)
isc_socketmgr_destroy(&dhcp_gbl_ctx.socketmgr);
if (dhcp_gbl_ctx.taskmgr != NULL)
isc_taskmgr_destroy(&dhcp_gbl_ctx.taskmgr);
if (dhcp_gbl_ctx.actx_started != ISC_FALSE) {
isc_app_ctxfinish(dhcp_gbl_ctx.actx);
dhcp_gbl_ctx.actx_started = ISC_FALSE;
}
if (dhcp_gbl_ctx.actx != NULL)
isc_appctx_destroy(&dhcp_gbl_ctx.actx);
if (dhcp_gbl_ctx.mctx != NULL)
isc_mem_detach(&dhcp_gbl_ctx.mctx);
return;
}
isc_result_t
dhcp_context_create(void) {
isc_result_t result;
/*
* Set up the error messages, this isn't the right place
* for this call but it is convienent for now.
*/
result = dhcp_result_register();
if (result != ISC_R_SUCCESS) {
log_fatal("register_table() %s: %u", "failed", result);
}
memset(&dhcp_gbl_ctx, 0, sizeof (dhcp_gbl_ctx));
isc_lib_register();
/* get the current time for use as the random seed */
gettimeofday(&cur_tv, (struct timezone *)0);
isc_random_seed(cur_tv.tv_sec);
#if defined (NSUPDATE)
result = dns_lib_init();
if (result != ISC_R_SUCCESS)
goto cleanup;
#endif
result = isc_mem_create(0, 0, &dhcp_gbl_ctx.mctx);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_appctx_create(dhcp_gbl_ctx.mctx, &dhcp_gbl_ctx.actx);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_app_ctxstart(dhcp_gbl_ctx.actx);
if (result != ISC_R_SUCCESS)
return (result);
dhcp_gbl_ctx.actx_started = ISC_TRUE;
result = isc_taskmgr_createinctx(dhcp_gbl_ctx.mctx,
dhcp_gbl_ctx.actx,
1, 0,
&dhcp_gbl_ctx.taskmgr);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_socketmgr_createinctx(dhcp_gbl_ctx.mctx,
dhcp_gbl_ctx.actx,
&dhcp_gbl_ctx.socketmgr);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_timermgr_createinctx(dhcp_gbl_ctx.mctx,
dhcp_gbl_ctx.actx,
&dhcp_gbl_ctx.timermgr);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*sar*/
/*
* We currently use a large number for quantum to get around
* an issue in the fdwatchpoke code that allows us to re-check
* a socket for reading or writing even if it already has a pending
* read or write. This event causes an exception and stops the
* program. When that code is fixed the quantum can be reduced.
*/
result = isc_task_create(dhcp_gbl_ctx.taskmgr, 100,
&dhcp_gbl_ctx.task);
if (result != ISC_R_SUCCESS)
goto cleanup;
#if defined (NSUPDATE)
result = dns_client_createx(dhcp_gbl_ctx.mctx,
dhcp_gbl_ctx.actx,
dhcp_gbl_ctx.taskmgr,
dhcp_gbl_ctx.socketmgr,
dhcp_gbl_ctx.timermgr,
0,
&dhcp_gbl_ctx.dnsclient);
if (result != ISC_R_SUCCESS)
goto cleanup;
#else
/* The dst library is inited as part of dns_lib_init, we don't
* need it if NSUPDATE is enabled */
result = dst_lib_init(dhcp_gbl_ctx.mctx, NULL, 0);
if (result != ISC_R_SUCCESS)
goto cleanup;
#endif
return(ISC_R_SUCCESS);
cleanup:
isclib_cleanup();
return(result);
}
/* Convert a string name into the proper structure for the isc routines */
isc_result_t
dhcp_isc_name(unsigned char *namestr,
dns_fixedname_t *namefix,
dns_name_t **name)
{
size_t namelen;
isc_buffer_t b;
isc_result_t result;
namelen = strlen((char *)namestr);
isc_buffer_init(&b, namestr, namelen);
isc_buffer_add(&b, namelen);
dns_fixedname_init(namefix);
*name = dns_fixedname_name(namefix);
result = dns_name_fromtext(*name, &b, NULL, 0, NULL);
isc_buffer_invalidate(&b);
return(result);
}
isc_result_t
isclib_make_dst_key(char *inname,
char *algorithm,
unsigned char *secret,
int length,
dst_key_t **dstkey)
{
isc_result_t result;
dns_name_t *name;
dns_fixedname_t name0;
isc_buffer_t b;
int namelen;
isc_buffer_init(&b, secret, length);
isc_buffer_add(&b, length);
/* We only support HMAC_MD5 currently */
if (strcasecmp(algorithm, DHCP_HMAC_MD5_NAME) != 0) {
return(DHCP_R_INVALIDARG);
}
/*
* Previously we allowed key names without a trailing '.'
* however the current dst code requires the names to end
* in a period. If the name doesn't have a trailing period
* add one before sending it to the dst code.
*/
namelen = strlen(inname);
if (inname[namelen-1] != '.') {
char *newname = NULL;
newname = (char *)dmalloc(namelen + 2, MDL);
if (newname == NULL) {
log_error("unable to allocate memory for key name");
return(ISC_R_NOMEMORY);
}
strcpy(newname, inname);
newname[namelen] = '.';
newname[namelen+1] = 0;
result = dhcp_isc_name((unsigned char *)newname, &name0, &name);
dfree(newname, MDL);
} else {
result = dhcp_isc_name((unsigned char *)inname, &name0, &name);
}
if (result != ISC_R_SUCCESS) {
return(result);
}
return(dst_key_frombuffer(name, DST_ALG_HMACMD5, DNS_KEYOWNER_ENTITY,
DNS_KEYPROTO_DNSSEC, dns_rdataclass_in,
&b, dhcp_gbl_ctx.mctx, dstkey));
}
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