mirror of
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
244
extensions/ipset/ipset_portmap.c
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244
extensions/ipset/ipset_portmap.c
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/* Copyright 2004 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 "ip_set_portmap.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_ADDDEL_PORT 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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DP("create INIT");
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/* Nothing */
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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_portmap_create *mydata =
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(struct ip_set_req_portmap_create *) data;
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DP("create_parse");
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switch (c) {
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case '1':
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parse_port(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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port_tostring(mydata->from, 0));
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break;
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case '2':
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parse_port(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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port_tostring(mydata->to, 0));
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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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/* 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_portmap_create *mydata =
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(struct ip_set_req_portmap_create *) data;
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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\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: %d", 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 (mydata->to - mydata->from > MAX_RANGE)
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exit_error(PARAMETER_PROBLEM,
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"Range too large. Max is %d ports 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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{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_portmap *mydata =
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(struct ip_set_req_portmap *) data;
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parse_port(optarg, &mydata->port);
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DP("%s", port_tostring(mydata->port, 0));
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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_portmap_create *header =
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(struct ip_set_req_portmap_create *) data;
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struct ip_set_portmap *map =
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(struct ip_set_portmap *) set->settype->header;
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memset(map, 0, sizeof(struct ip_set_portmap));
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map->first_port = header->from;
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map->last_port = header->to;
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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_portmap *mysetdata =
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(struct ip_set_portmap *) set->settype->header;
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printf(" from: %s", port_tostring(mysetdata->first_port, options));
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printf(" to: %s\n", port_tostring(mysetdata->last_port, options));
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}
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void printports_sorted(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_portmap *mysetdata =
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(struct ip_set_portmap *) set->settype->header;
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u_int32_t addr = mysetdata->first_port;
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DP("%u -- %u", mysetdata->first_port, mysetdata->last_port);
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while (addr <= mysetdata->last_port) {
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if (test_bit(addr - mysetdata->first_port, data))
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printf("%s\n", port_tostring(addr, options));
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addr++;
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}
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}
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char * binding_port_tostring(struct set *set, ip_set_ip_t ip, unsigned options)
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{
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return port_tostring(ip, 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_portmap *mysetdata =
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(struct ip_set_portmap *) set->settype->header;
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printf("-N %s %s --from %s",
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set->name,
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set->settype->typename,
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port_tostring(mysetdata->first_port, options));
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printf(" --to %s\n",
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port_tostring(mysetdata->last_port, options));
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}
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void saveports(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_portmap *mysetdata =
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(struct ip_set_portmap *) set->settype->header;
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u_int32_t addr = mysetdata->first_port;
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while (addr <= mysetdata->last_port) {
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if (test_bit(addr - mysetdata->first_port, data))
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printf("-A %s %s\n",
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set->name,
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port_tostring(addr, options));
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addr++;
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}
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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 portmap --from PORT --to PORT\n"
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"-A set PORT\n"
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"-D set PORT\n"
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"-T set PORT\n");
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}
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static struct settype settype_portmap = {
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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_portmap_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_portmap),
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.adt_parser = &adt_parser,
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/* Printing */
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.header_size = sizeof(struct ip_set_portmap),
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.initheader = &initheader,
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.printheader = &printheader,
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.printips = &printports_sorted, /* We only have sorted version */
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.printips_sorted = &printports_sorted,
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.saveheader = &saveheader,
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.saveips = &saveports,
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/* Bindings */
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.bindip_tostring = &binding_port_tostring,
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.bindip_parse = &parse_port,
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.usage = &usage,
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};
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static __attribute__((constructor)) void portmap_init(void)
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{
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settype_register(&settype_portmap);
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}
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