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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <krb5/locate_plugin.h>
#include "krb5_plugin/sssd_krb5_locator_plugin.h"
struct sssd_ctx {
char *sssd_realm;
char *sssd_kdc;
};
krb5_error_code sssd_krb5_locator_init(krb5_context context,
void **private_data)
{
struct sssd_ctx *ctx;
char *dummy;
ctx = calloc(1,sizeof(struct sssd_ctx));
if (ctx == NULL) return ENOMEM;
dummy = getenv(SSSD_REALM);
if (dummy == NULL) goto failed;
ctx->sssd_realm = strdup(dummy);
if (ctx->sssd_realm == NULL) goto failed;
dummy = getenv(SSSD_KDC);
if (dummy == NULL) goto failed;
ctx->sssd_kdc = strdup(dummy);
if (ctx->sssd_kdc == NULL) goto failed;
*private_data = ctx;
return 0;
failed:
free(ctx->sssd_realm);
free(ctx->sssd_kdc);
free(ctx);
private_data = NULL;
return EINVAL;
}
void sssd_krb5_locator_close(void *private_data)
{
struct sssd_ctx *ctx;
if (private_data == NULL) return;
ctx = (struct sssd_ctx *) private_data;
free(ctx->sssd_realm);
free(ctx->sssd_kdc);
free(ctx);
return;
}
krb5_error_code sssd_krb5_locator_lookup(void *private_data,
enum locate_service_type svc,
const char *realm,
int socktype,
int family,
int (*cbfunc)(void *, int, struct sockaddr *),
void *cbdata)
{
int ret;
struct sockaddr_in addr;
struct sssd_ctx *ctx;
if (private_data == NULL) return KRB5_PLUGIN_NO_HANDLE;
ctx = (struct sssd_ctx *) private_data;
#ifdef KRB5_PLUGIN_DEBUG
fprintf(stderr,"[%s][%s][%s][%d][%d][%d]\n", realm, ctx->sssd_realm,
ctx->sssd_kdc, socktype,
family, svc);
#endif
switch (svc) {
case locate_service_kdc:
case locate_service_master_kdc:
case locate_service_kadmin:
break;
case locate_service_krb524:
case locate_service_kpasswd:
return KRB5_PLUGIN_NO_HANDLE;
default:
return EINVAL;
}
switch (family) {
case AF_UNSPEC:
case AF_INET:
break;
default:
return KRB5_PLUGIN_NO_HANDLE;
}
switch (socktype) {
case SOCK_STREAM:
case SOCK_DGRAM:
break;
default:
return EINVAL;
}
if (strcmp(realm, ctx->sssd_realm) != 0)
return KRB5_PLUGIN_NO_HANDLE;
addr.sin_family = AF_INET;
ret = inet_aton(ctx->sssd_kdc, &addr.sin_addr);
if (ret == 0) return EINVAL;
addr.sin_port = htons(88);
ret = cbfunc(cbdata, socktype, (struct sockaddr *) &addr);
return 0;
}
const krb5plugin_service_locate_ftable service_locator = {
0, /* version */
sssd_krb5_locator_init,
sssd_krb5_locator_close,
sssd_krb5_locator_lookup,
};
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