/*
 * Copyright (C) 2002 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: load_hash.c,v 1.11.2.2 2005/02/01 02:44:05 darrenr Exp $
 *
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2014, Joyent, Inc.  All rights reserved.
 */

#include <fcntl.h>
#include <sys/ioctl.h>
#include "ipf.h"
#include "netinet/ip_lookup.h"
#include "netinet/ip_htable.h"
#include "ipfzone.h"

static int hashfd = -1;


int load_hash(iphp, list, iocfunc)
iphtable_t *iphp;
iphtent_t *list;
ioctlfunc_t iocfunc;
{
        iplookupop_t op;
        iphtable_t iph;
        iphtent_t *a;
        size_t size;
        int n;

        if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
                hashfd = open(IPLOOKUP_NAME, O_RDWR);
        if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
                return -1;
        if (setzone(hashfd) != 0) {
                close(hashfd);
                return -1;
        }

        for (n = 0, a = list; a != NULL; a = a->ipe_next)
                n++;

        op.iplo_arg = 0;
        op.iplo_type = IPLT_HASH;
        op.iplo_unit = iphp->iph_unit;
        strncpy(op.iplo_name, iphp->iph_name, sizeof(op.iplo_name));
        if (*op.iplo_name == '\0')
                op.iplo_arg = IPHASH_ANON;
        op.iplo_size = sizeof(iph);
        op.iplo_struct = &iph;
        iph.iph_unit = iphp->iph_unit;
        iph.iph_type = iphp->iph_type;
        strncpy(iph.iph_name, iphp->iph_name, sizeof(iph.iph_name));
        iph.iph_flags = iphp->iph_flags;
        if (n <= 0)
                n = 1;
        if (iphp->iph_size == 0)
                size = n * 2 - 1;
        else
                size = iphp->iph_size;
        if ((list == NULL) && (size == 1)) {
                fprintf(stderr,
                        "WARNING: empty hash table %s, recommend setting %s\n",
                        iphp->iph_name, "size to match expected use");
        }
        iph.iph_size = size;
        iph.iph_seed = iphp->iph_seed;
        iph.iph_table = NULL;
        iph.iph_ref = 0;

        if ((opts & OPT_REMOVE) == 0) {
                if ((*iocfunc)(hashfd, SIOCLOOKUPADDTABLE, &op))
                        if ((opts & OPT_DONOTHING) == 0) {
                                perror("load_hash:SIOCLOOKUPADDTABLE");
                                return -1;
                        }
        }

        strncpy(op.iplo_name, iph.iph_name, sizeof(op.iplo_name));
        strncpy(iphp->iph_name, iph.iph_name, sizeof(op.iplo_name));

        if (opts & OPT_VERBOSE) {
                for (a = list; a != NULL; a = a->ipe_next) {
                        if (a->ipe_family == AF_INET) {
                                a->ipe_addr.in4_addr = ntohl(a->ipe_addr.in4_addr);
                                a->ipe_mask.in4_addr = ntohl(a->ipe_mask.in4_addr);
                        }
                }
                iph.iph_table = calloc(size, sizeof(*iph.iph_table));
                if (iph.iph_table == NULL) {
                        perror("calloc(size, sizeof(*iph.iph_table))");
                        return -1;
                }
                iph.iph_table[0] = list;
                printhash(&iph, bcopywrap, iph.iph_name, opts);
                free(iph.iph_table);

                for (a = list; a != NULL; a = a->ipe_next) {
                        if (a->ipe_family == AF_INET) {
                                a->ipe_addr.in4_addr = htonl(a->ipe_addr.in4_addr);
                                a->ipe_mask.in4_addr = htonl(a->ipe_mask.in4_addr);
                        }
                }
        }

        if (opts & OPT_DEBUG)
                printf("Hash %s:\n", iph.iph_name);

        for (a = list; a != NULL; a = a->ipe_next)
                load_hashnode(iphp->iph_unit, iph.iph_name, a, iocfunc);

        if ((opts & OPT_REMOVE) != 0) {
                if ((*iocfunc)(hashfd, SIOCLOOKUPDELTABLE, &op))
                        if ((opts & OPT_DONOTHING) == 0) {
                                perror("load_hash:SIOCLOOKUPDELTABLE");
                                return -1;
                        }
        }
        return 0;
}