cmd/nscd/getnet.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * Routines to handle getnet* calls in nscd
 */

#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "cache.h"

#define nam_db  ctx->nsc_db[0]
#define addr_db ctx->nsc_db[1]

#define NSC_NAME_NETWORKS_BYNAME    "getnetbyname"
#define NSC_NAME_NETWORKS_BYADDR    "getnetbyaddr"

static int netaddr_compar(const void *, const void *);
static uint_t netaddr_gethash(nss_XbyY_key_t *, int);
static void netaddr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);

void
net_init_ctx(nsc_ctx_t *ctx) {
    ctx->dbname = NSS_DBNAM_NETWORKS;
    ctx->db_count = 2;
    ctx->file_name = "/etc/inet/networks";

    nam_db = make_cache(nsc_key_ces,
            NSS_DBOP_NETWORKS_BYNAME,
            NSC_NAME_NETWORKS_BYNAME,
            NULL, NULL, NULL, nsc_ht_default, -1);

    addr_db = make_cache(nsc_key_other,
            NSS_DBOP_NETWORKS_BYADDR,
            NSC_NAME_NETWORKS_BYADDR,
            netaddr_compar,
            netaddr_getlogstr,
            netaddr_gethash, nsc_ht_default, -1);
}

static void
netaddr_getlogstr(char *name, char *whoami, size_t len, nss_XbyY_args_t *argp) {
    if (argp->key.netaddr.type == AF_INET) {
        uint32_t    net;
        uchar_t     *up;

        net = htonl(argp->key.netaddr.net);
        up = (uchar_t *)&net;

        if (up[0])
            (void) snprintf(whoami, len, "%s [key=%d.%d.%d.%d]",
                name,
                up[0], up[1], up[2], up[3]);
        else if (up[1])
            (void) snprintf(whoami, len, "%s [key=%d.%d.%d]",
                name,
                up[1], up[2], up[3]);
        else if (up[2])
            (void) snprintf(whoami, len, "%s [key=%d.%d]",
                name,
                up[2], up[3]);
        else
            (void) snprintf(whoami, len, "%s [key=%d]",
                name,
                up[3]);
    } else {
        (void) snprintf(whoami, len, "%s [key=%d, %d]",
            name,
            argp->key.netaddr.net, argp->key.netaddr.type);
    }
}

static int
netaddr_compar(const void *n1, const void *n2) {
    nsc_entry_t *e1, *e2;

    e1 = (nsc_entry_t *)n1;
    e2 = (nsc_entry_t *)n2;

    if (e1->key.netaddr.type > e2->key.netaddr.type)
        return (1);
    else if (e1->key.netaddr.type < e2->key.netaddr.type)
        return (-1);

    return (_NSC_INT_KEY_CMP(e1->key.netaddr.net, e2->key.netaddr.net));
}

static uint_t
netaddr_gethash(nss_XbyY_key_t *key, int htsize) {
    return (db_gethash(&key->netaddr.net,
            sizeof (key->netaddr.net), htsize));
}