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[FreeBSD/releng/10.0.git] / contrib / ipfilter / lib / load_hash.c
1 /*      $FreeBSD$       */
2
3 /*
4  * Copyright (C) 2012 by Darren Reed.
5  *
6  * See the IPFILTER.LICENCE file for details on licencing.
7  *
8  * $Id$
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
17
18 int
19 load_hash(iphp, list, iocfunc)
20         iphtable_t *iphp;
21         iphtent_t *list;
22         ioctlfunc_t iocfunc;
23 {
24         iplookupop_t op;
25         iphtable_t iph;
26         iphtent_t *a;
27         size_t size;
28         int n;
29
30         if (pool_open() == -1)
31                 return -1;
32
33         for (n = 0, a = list; a != NULL; a = a->ipe_next)
34                 n++;
35
36         bzero((char *)&iph, sizeof(iph));
37         op.iplo_arg = 0;
38         op.iplo_type = IPLT_HASH;
39         op.iplo_unit = iphp->iph_unit;
40         strncpy(op.iplo_name, iphp->iph_name, sizeof(op.iplo_name));
41         if (*op.iplo_name == '\0')
42                 op.iplo_arg = IPHASH_ANON;
43         op.iplo_size = sizeof(iph);
44         op.iplo_struct = &iph;
45         iph = *iphp;
46         if (n <= 0)
47                 n = 1;
48         if (iphp->iph_size == 0)
49                 size = n * 2 - 1;
50         else
51                 size = iphp->iph_size;
52         if ((list == NULL) && (size == 1)) {
53                 fprintf(stderr,
54                         "WARNING: empty hash table %s, recommend setting %s\n",
55                         iphp->iph_name, "size to match expected use");
56         }
57         iph.iph_size = size;
58         iph.iph_table = NULL;
59         iph.iph_list = NULL;
60         iph.iph_ref = 0;
61
62         if ((opts & OPT_REMOVE) == 0) {
63                 if (pool_ioctl(iocfunc, SIOCLOOKUPADDTABLE, &op))
64                         if ((opts & OPT_DONOTHING) == 0) {
65                                 return ipf_perror_fd(pool_fd(), iocfunc,
66                                         "add lookup hash table");
67                         }
68         }
69
70         strncpy(iph.iph_name, op.iplo_name, sizeof(op.iplo_name));
71         strncpy(iphp->iph_name, op.iplo_name, sizeof(op.iplo_name));
72
73         if (opts & OPT_VERBOSE) {
74                 iph.iph_table = calloc(size, sizeof(*iph.iph_table));
75                 if (iph.iph_table == NULL) {
76                         perror("calloc(size, sizeof(*iph.iph_table))");
77                         return -1;
78                 }
79                 iph.iph_list = list;
80                 printhash(&iph, bcopywrap, iph.iph_name, opts, NULL);
81                 free(iph.iph_table);
82
83                 for (a = list; a != NULL; a = a->ipe_next) {
84                         a->ipe_addr.in4_addr = htonl(a->ipe_addr.in4_addr);
85                         a->ipe_mask.in4_addr = htonl(a->ipe_mask.in4_addr);
86                 }
87         }
88
89         if (opts & OPT_DEBUG)
90                 printf("Hash %s:\n", iph.iph_name);
91
92         for (a = list; a != NULL; a = a->ipe_next)
93                 load_hashnode(iphp->iph_unit, iph.iph_name, a, 0, iocfunc);
94
95         if ((opts & OPT_REMOVE) != 0) {
96                 if (pool_ioctl(iocfunc, SIOCLOOKUPDELTABLE, &op))
97                         if ((opts & OPT_DONOTHING) == 0) {
98                                 return ipf_perror_fd(pool_fd(), iocfunc,
99                                         "delete lookup hash table");
100                         }
101         }
102         return 0;
103 }