xref: /illumos-gate/usr/src/cmd/ipf/lib/common/load_hash.c (revision 94bdecd9)
1 /*
2  * Copyright (C) 2002 by Darren Reed.
3  *
4  * See the IPFILTER.LICENCE file for details on licencing.
5  *
6  * $Id: load_hash.c,v 1.11.2.2 2005/02/01 02:44:05 darrenr Exp $
7  *
8  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
9  * Use is subject to license terms.
10  *
11  * Copyright (c) 2014, Joyent, Inc.  All rights reserved.
12  */
13 
14 #include <fcntl.h>
15 #include <sys/ioctl.h>
16 #include "ipf.h"
17 #include "netinet/ip_lookup.h"
18 #include "netinet/ip_htable.h"
19 #include "ipfzone.h"
20 
21 static int hashfd = -1;
22 
23 
load_hash(iphp,list,iocfunc)24 int load_hash(iphp, list, iocfunc)
25 iphtable_t *iphp;
26 iphtent_t *list;
27 ioctlfunc_t iocfunc;
28 {
29 	iplookupop_t op;
30 	iphtable_t iph;
31 	iphtent_t *a;
32 	size_t size;
33 	int n;
34 
35 	if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
36 		hashfd = open(IPLOOKUP_NAME, O_RDWR);
37 	if ((hashfd == -1) && ((opts & OPT_DONOTHING) == 0))
38 		return -1;
39 	if (setzone(hashfd) != 0) {
40 		close(hashfd);
41 		return -1;
42 	}
43 
44 	for (n = 0, a = list; a != NULL; a = a->ipe_next)
45 		n++;
46 
47 	op.iplo_arg = 0;
48 	op.iplo_type = IPLT_HASH;
49 	op.iplo_unit = iphp->iph_unit;
50 	strncpy(op.iplo_name, iphp->iph_name, sizeof(op.iplo_name));
51 	if (*op.iplo_name == '\0')
52 		op.iplo_arg = IPHASH_ANON;
53 	op.iplo_size = sizeof(iph);
54 	op.iplo_struct = &iph;
55 	iph.iph_unit = iphp->iph_unit;
56 	iph.iph_type = iphp->iph_type;
57 	strncpy(iph.iph_name, iphp->iph_name, sizeof(iph.iph_name));
58 	iph.iph_flags = iphp->iph_flags;
59 	if (n <= 0)
60 		n = 1;
61 	if (iphp->iph_size == 0)
62 		size = n * 2 - 1;
63 	else
64 		size = iphp->iph_size;
65 	if ((list == NULL) && (size == 1)) {
66 		fprintf(stderr,
67 			"WARNING: empty hash table %s, recommend setting %s\n",
68 			iphp->iph_name, "size to match expected use");
69 	}
70 	iph.iph_size = size;
71 	iph.iph_seed = iphp->iph_seed;
72 	iph.iph_table = NULL;
73 	iph.iph_ref = 0;
74 
75 	if ((opts & OPT_REMOVE) == 0) {
76 		if ((*iocfunc)(hashfd, SIOCLOOKUPADDTABLE, &op))
77 			if ((opts & OPT_DONOTHING) == 0) {
78 				perror("load_hash:SIOCLOOKUPADDTABLE");
79 				return -1;
80 			}
81 	}
82 
83 	strncpy(op.iplo_name, iph.iph_name, sizeof(op.iplo_name));
84 	strncpy(iphp->iph_name, iph.iph_name, sizeof(op.iplo_name));
85 
86 	if (opts & OPT_VERBOSE) {
87 		for (a = list; a != NULL; a = a->ipe_next) {
88 			if (a->ipe_family == AF_INET) {
89 				a->ipe_addr.in4_addr = ntohl(a->ipe_addr.in4_addr);
90 				a->ipe_mask.in4_addr = ntohl(a->ipe_mask.in4_addr);
91 			}
92 		}
93 		iph.iph_table = calloc(size, sizeof(*iph.iph_table));
94 		if (iph.iph_table == NULL) {
95 			perror("calloc(size, sizeof(*iph.iph_table))");
96 			return -1;
97 		}
98 		iph.iph_table[0] = list;
99 		printhash(&iph, bcopywrap, iph.iph_name, opts);
100 		free(iph.iph_table);
101 
102 		for (a = list; a != NULL; a = a->ipe_next) {
103 			if (a->ipe_family == AF_INET) {
104 				a->ipe_addr.in4_addr = htonl(a->ipe_addr.in4_addr);
105 				a->ipe_mask.in4_addr = htonl(a->ipe_mask.in4_addr);
106 			}
107 		}
108 	}
109 
110 	if (opts & OPT_DEBUG)
111 		printf("Hash %s:\n", iph.iph_name);
112 
113 	for (a = list; a != NULL; a = a->ipe_next)
114 		load_hashnode(iphp->iph_unit, iph.iph_name, a, iocfunc);
115 
116 	if ((opts & OPT_REMOVE) != 0) {
117 		if ((*iocfunc)(hashfd, SIOCLOOKUPDELTABLE, &op))
118 			if ((opts & OPT_DONOTHING) == 0) {
119 				perror("load_hash:SIOCLOOKUPDELTABLE");
120 				return -1;
121 			}
122 	}
123 	return 0;
124 }
125