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git://git.code.sf.net/p/xtables-addons/xtables-addons
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Import ipset-2.3.2a (userspace components)
This commit is contained in:
Jan Engelhardt
360
extensions/ipset/ipset_ipmap.c
Normal file
360
extensions/ipset/ipset_ipmap.c
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@@ -0,0 +1,360 @@
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/* Copyright 2000-2004 Joakim Axelsson (gozem@linux.nu)
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* Patrick Schaaf (bof@bof.de)
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* Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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/* #include <asm/bitops.h> */
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#include "ip_set_ipmap.h"
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#include "ipset.h"
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#define BUFLEN 30;
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#define OPT_CREATE_FROM 0x01U
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#define OPT_CREATE_TO 0x02U
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#define OPT_CREATE_NETWORK 0x04U
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#define OPT_CREATE_NETMASK 0x08U
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#define OPT_ADDDEL_IP 0x01U
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/* Initialize the create. */
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void create_init(void *data)
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{
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struct ip_set_req_ipmap_create *mydata =
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(struct ip_set_req_ipmap_create *) data;
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DP("create INIT");
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mydata->netmask = 0xFFFFFFFF;
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}
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/* Function which parses command options; returns true if it ate an option */
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int create_parse(int c, char *argv[], void *data, unsigned *flags)
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{
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struct ip_set_req_ipmap_create *mydata =
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(struct ip_set_req_ipmap_create *) data;
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unsigned int bits;
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DP("create_parse");
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switch (c) {
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case '1':
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parse_ip(optarg, &mydata->from);
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*flags |= OPT_CREATE_FROM;
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DP("--from %x (%s)", mydata->from,
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ip_tostring_numeric(mydata->from));
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break;
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case '2':
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parse_ip(optarg, &mydata->to);
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*flags |= OPT_CREATE_TO;
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DP("--to %x (%s)", mydata->to,
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ip_tostring_numeric(mydata->to));
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break;
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case '3':
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parse_ipandmask(optarg, &mydata->from, &mydata->to);
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/* Make to the last of from + mask */
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if (mydata->to)
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mydata->to = mydata->from | ~(mydata->to);
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else {
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mydata->from = 0x00000000;
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mydata->to = 0xFFFFFFFF;
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}
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*flags |= OPT_CREATE_NETWORK;
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DP("--network from %x (%s)",
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mydata->from, ip_tostring_numeric(mydata->from));
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DP("--network to %x (%s)",
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mydata->to, ip_tostring_numeric(mydata->to));
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break;
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case '4':
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if (string_to_number(optarg, 0, 32, &bits))
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exit_error(PARAMETER_PROBLEM,
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"Invalid netmask `%s' specified", optarg);
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if (bits != 0)
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mydata->netmask = 0xFFFFFFFF << (32 - bits);
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*flags |= OPT_CREATE_NETMASK;
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DP("--netmask %x", mydata->netmask);
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break;
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default:
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return 0;
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}
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return 1;
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}
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#define ERRSTRLEN 256
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/* Final check; exit if not ok. */
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void create_final(void *data, unsigned int flags)
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{
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struct ip_set_req_ipmap_create *mydata =
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(struct ip_set_req_ipmap_create *) data;
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ip_set_ip_t range;
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char errstr[ERRSTRLEN];
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if (flags == 0)
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exit_error(PARAMETER_PROBLEM,
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"Need to specify --from and --to, or --network\n");
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if (flags & OPT_CREATE_NETWORK) {
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/* --network */
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if ((flags & OPT_CREATE_FROM) || (flags & OPT_CREATE_TO))
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exit_error(PARAMETER_PROBLEM,
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"Can't specify --from or --to with --network\n");
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} else {
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/* --from --to */
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if ((flags & OPT_CREATE_FROM) == 0
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|| (flags & OPT_CREATE_TO) == 0)
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exit_error(PARAMETER_PROBLEM,
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"Need to specify both --from and --to\n");
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}
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DP("from : %x to: %x diff: %x",
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mydata->from, mydata->to,
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mydata->to - mydata->from);
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if (mydata->from > mydata->to)
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exit_error(PARAMETER_PROBLEM,
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"From can't be lower than to.\n");
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if (flags & OPT_CREATE_NETMASK) {
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unsigned int mask_bits, netmask_bits;
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ip_set_ip_t mask;
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if ((mydata->from & mydata->netmask) != mydata->from)
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exit_error(PARAMETER_PROBLEM,
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"%s is not a network address according to netmask %d\n",
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ip_tostring_numeric(mydata->from),
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mask_to_bits(mydata->netmask));
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mask = range_to_mask(mydata->from, mydata->to, &mask_bits);
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if (!mask
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&& (mydata->from || mydata->to != 0xFFFFFFFF)) {
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strncpy(errstr, ip_tostring_numeric(mydata->from),
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ERRSTRLEN-2);
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errstr[ERRSTRLEN-1] = '\0';
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exit_error(PARAMETER_PROBLEM,
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"%s-%s is not a full network (%x)\n",
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errstr,
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ip_tostring_numeric(mydata->to), mask);
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}
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netmask_bits = mask_to_bits(mydata->netmask);
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if (netmask_bits <= mask_bits) {
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strncpy(errstr, ip_tostring_numeric(mydata->from),
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ERRSTRLEN-2);
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errstr[ERRSTRLEN-1] = '\0';
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exit_error(PARAMETER_PROBLEM,
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"%d netmask specifies larger or equal netblock than %s-%s (%d)\n",
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netmask_bits,
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errstr,
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ip_tostring_numeric(mydata->to),
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mask_bits);
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}
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range = (1<<(netmask_bits - mask_bits)) - 1;
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} else {
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range = mydata->to - mydata->from;
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}
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if (range > MAX_RANGE)
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exit_error(PARAMETER_PROBLEM,
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"Range too large. Max is %d IPs in range\n",
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MAX_RANGE+1);
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}
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/* Create commandline options */
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static struct option create_opts[] = {
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{"from", 1, 0, '1'},
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{"to", 1, 0, '2'},
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{"network", 1, 0, '3'},
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{"netmask", 1, 0, '4'},
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{0}
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};
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/* Add, del, test parser */
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ip_set_ip_t adt_parser(unsigned cmd, const char *optarg, void *data)
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{
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struct ip_set_req_ipmap *mydata =
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(struct ip_set_req_ipmap *) data;
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DP("ipmap: %p %p", optarg, data);
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parse_ip(optarg, &mydata->ip);
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DP("%s", ip_tostring_numeric(mydata->ip));
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return 1;
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}
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/*
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* Print and save
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*/
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void initheader(struct set *set, const void *data)
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{
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struct ip_set_req_ipmap_create *header =
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(struct ip_set_req_ipmap_create *) data;
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struct ip_set_ipmap *map =
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(struct ip_set_ipmap *) set->settype->header;
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memset(map, 0, sizeof(struct ip_set_ipmap));
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map->first_ip = header->from;
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map->last_ip = header->to;
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map->netmask = header->netmask;
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if (map->netmask == 0xFFFFFFFF) {
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map->hosts = 1;
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map->sizeid = map->last_ip - map->first_ip + 1;
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} else {
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unsigned int mask_bits, netmask_bits;
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ip_set_ip_t mask;
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mask = range_to_mask(header->from, header->to, &mask_bits);
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netmask_bits = mask_to_bits(header->netmask);
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DP("bits: %i %i", mask_bits, netmask_bits);
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map->hosts = 2 << (32 - netmask_bits - 1);
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map->sizeid = 2 << (netmask_bits - mask_bits - 1);
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}
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DP("%i %i", map->hosts, map->sizeid );
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}
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void printheader(struct set *set, unsigned options)
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{
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struct ip_set_ipmap *mysetdata =
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(struct ip_set_ipmap *) set->settype->header;
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printf(" from: %s", ip_tostring(mysetdata->first_ip, options));
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printf(" to: %s", ip_tostring(mysetdata->last_ip, options));
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if (mysetdata->netmask == 0xFFFFFFFF)
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printf("\n");
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else
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printf(" netmask: %d\n", mask_to_bits(mysetdata->netmask));
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}
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void printips_sorted(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_ipmap *mysetdata =
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(struct ip_set_ipmap *) set->settype->header;
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ip_set_ip_t id;
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for (id = 0; id < mysetdata->sizeid; id++)
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if (test_bit(id, data))
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printf("%s\n",
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ip_tostring(mysetdata->first_ip
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+ id * mysetdata->hosts,
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options));
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}
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void saveheader(struct set *set, unsigned options)
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{
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struct ip_set_ipmap *mysetdata =
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(struct ip_set_ipmap *) set->settype->header;
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printf("-N %s %s --from %s",
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set->name, set->settype->typename,
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ip_tostring(mysetdata->first_ip, options));
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printf(" --to %s",
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ip_tostring(mysetdata->last_ip, options));
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if (mysetdata->netmask == 0xFFFFFFFF)
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printf("\n");
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else
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printf(" --netmask %d\n",
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mask_to_bits(mysetdata->netmask));
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}
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void saveips(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_ipmap *mysetdata =
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(struct ip_set_ipmap *) set->settype->header;
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ip_set_ip_t id;
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DP("%s", set->name);
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for (id = 0; id < mysetdata->sizeid; id++)
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if (test_bit(id, data))
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printf("-A %s %s\n",
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set->name,
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ip_tostring(mysetdata->first_ip
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+ id * mysetdata->hosts,
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options));
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}
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void usage(void)
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{
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printf
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("-N set ipmap --from IP --to IP [--netmask CIDR-netmask]\n"
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"-N set ipmap --network IP/mask [--netmask CIDR-netmask]\n"
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"-A set IP\n"
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"-D set IP\n"
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"-T set IP\n");
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}
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static struct settype settype_ipmap = {
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.typename = SETTYPE_NAME,
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.protocol_version = IP_SET_PROTOCOL_VERSION,
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/* Create */
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.create_size = sizeof(struct ip_set_req_ipmap_create),
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.create_init = &create_init,
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.create_parse = &create_parse,
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.create_final = &create_final,
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.create_opts = create_opts,
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/* Add/del/test */
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.adt_size = sizeof(struct ip_set_req_ipmap),
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.adt_parser = &adt_parser,
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/* Printing */
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.header_size = sizeof(struct ip_set_ipmap),
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.initheader = &initheader,
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.printheader = &printheader,
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.printips = &printips_sorted, /* We only have sorted version */
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.printips_sorted = &printips_sorted,
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.saveheader = &saveheader,
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.saveips = &saveips,
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/* Bindings */
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.bindip_tostring = &binding_ip_tostring,
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.bindip_parse = &parse_ip,
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.usage = &usage,
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};
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static __attribute__((constructor)) void ipmap_init(void)
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{
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settype_register(&settype_ipmap);
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}
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