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[FreeBSD/releng/9.2.git] / contrib / ipfilter / lib / remove_hash.c
1 /*      $FreeBSD$       */
2
3 /*
4  * Copyright (C) 2003 by Darren Reed.
5  *
6  * See the IPFILTER.LICENCE file for details on licencing.
7  *
8  * $Id: remove_hash.c,v 1.1.4.1 2006/06/16 17:21:16 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
17 static int hashfd = -1;
18
19
20 int remove_hash(iphp, iocfunc)
21 iphtable_t *iphp;
22 ioctlfunc_t iocfunc;
23 {
24         iplookupop_t op;
25         iphtable_t iph;
26
27         if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
28                 hashfd = open(IPLOOKUP_NAME, O_RDWR);
29         if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
30                 return -1;
31
32         op.iplo_type = IPLT_HASH;
33         op.iplo_unit = iphp->iph_unit;
34         strncpy(op.iplo_name, iphp->iph_name, sizeof(op.iplo_name));
35         if (*op.iplo_name == '\0')
36                 op.iplo_arg = IPHASH_ANON;
37         op.iplo_size = sizeof(iph);
38         op.iplo_struct = &iph;
39
40         bzero((char *)&iph, sizeof(iph));
41         iph.iph_unit = iphp->iph_unit;
42         iph.iph_type = iphp->iph_type;
43         strncpy(iph.iph_name, iphp->iph_name, sizeof(iph.iph_name));
44         iph.iph_flags = iphp->iph_flags;
45
46         if ((*iocfunc)(hashfd, SIOCLOOKUPDELTABLE, &op))
47                 if ((opts & OPT_DONOTHING) == 0) {
48                         perror("remove_hash:SIOCLOOKUPDELTABLE");
49                         return -1;
50                 }
51
52         return 0;
53 }