1/*	$NetBSD: load_hash.c,v 1.2 2012/02/15 17:55:06 riz Exp $	*/
2
3/*
4 * Copyright (C) 2002-2005 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * Id: load_hash.c,v 1.11.2.6 2009/01/01 03:48:21 darrenr Exp
9 */
10
11#include <fcntl.h>
12#include <sys/ioctl.h>
13#include "ipf.h"
14#include "netinet/ip_lookup.h"
15#include "netinet/ip_htable.h"
16
17static int hashfd = -1;
18
19
20int load_hash(iphp, list, iocfunc)
21iphtable_t *iphp;
22iphtent_t *list;
23ioctlfunc_t iocfunc;
24{
25	iplookupop_t op;
26	iphtable_t iph;
27	iphtent_t *a;
28	size_t size;
29	int n;
30
31	if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
32		hashfd = open(IPLOOKUP_NAME, O_RDWR);
33	if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
34		return -1;
35
36	for (n = 0, a = list; a != NULL; a = a->ipe_next)
37		n++;
38
39	bzero((char *)&iph, sizeof(iph));
40	op.iplo_arg = 0;
41	op.iplo_type = IPLT_HASH;
42	op.iplo_unit = iphp->iph_unit;
43	strncpy(op.iplo_name, iphp->iph_name, sizeof(op.iplo_name));
44	if (*op.iplo_name == '\0')
45		op.iplo_arg = IPHASH_ANON;
46	op.iplo_size = sizeof(iph);
47	op.iplo_struct = &iph;
48	iph.iph_unit = iphp->iph_unit;
49	iph.iph_type = iphp->iph_type;
50	strncpy(iph.iph_name, iphp->iph_name, sizeof(iph.iph_name));
51	iph.iph_flags = iphp->iph_flags;
52	if (n <= 0)
53		n = 1;
54	if (iphp->iph_size == 0)
55		size = n * 2 - 1;
56	else
57		size = iphp->iph_size;
58	if ((list == NULL) && (size == 1)) {
59		fprintf(stderr,
60			"WARNING: empty hash table %s, recommend setting %s\n",
61			iphp->iph_name, "size to match expected use");
62	}
63	iph.iph_size = size;
64	iph.iph_seed = iphp->iph_seed;
65	iph.iph_table = NULL;
66	iph.iph_list = NULL;
67	iph.iph_ref = 0;
68
69	if ((opts & OPT_REMOVE) == 0) {
70		if ((*iocfunc)(hashfd, SIOCLOOKUPADDTABLE, &op))
71			if ((opts & OPT_DONOTHING) == 0) {
72				perror("load_hash:SIOCLOOKUPADDTABLE");
73				return -1;
74			}
75	}
76
77	strncpy(iph.iph_name, op.iplo_name, sizeof(op.iplo_name));
78	strncpy(iphp->iph_name, op.iplo_name, sizeof(op.iplo_name));
79
80	if (opts & OPT_VERBOSE) {
81		for (a = list; a != NULL; a = a->ipe_next) {
82			a->ipe_addr.in4_addr = ntohl(a->ipe_addr.in4_addr);
83			a->ipe_mask.in4_addr = ntohl(a->ipe_mask.in4_addr);
84		}
85		iph.iph_table = calloc(size, sizeof(*iph.iph_table));
86		if (iph.iph_table == NULL) {
87			perror("calloc(size, sizeof(*iph.iph_table))");
88			return -1;
89		}
90		iph.iph_list = list;
91		printhash(&iph, bcopywrap, iph.iph_name, opts);
92		free(iph.iph_table);
93		iph.iph_list = NULL;
94
95		for (a = list; a != NULL; a = a->ipe_next) {
96			a->ipe_addr.in4_addr = htonl(a->ipe_addr.in4_addr);
97			a->ipe_mask.in4_addr = htonl(a->ipe_mask.in4_addr);
98		}
99	}
100
101	if (opts & OPT_DEBUG)
102		printf("Hash %s:\n", iph.iph_name);
103
104	for (a = list; a != NULL; a = a->ipe_next)
105		load_hashnode(iphp->iph_unit, iph.iph_name, a, iocfunc);
106
107	if ((opts & OPT_REMOVE) != 0) {
108		if ((*iocfunc)(hashfd, SIOCLOOKUPDELTABLE, &op))
109			if ((opts & OPT_DONOTHING) == 0) {
110				perror("load_hash:SIOCLOOKUPDELTABLE");
111				return -1;
112			}
113	}
114	return 0;
115}
116