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freebsd-dev/sbin/ipfw/nat64lsn.c
Andrey V. Elsukov 782360dec3 Bring in some last changes in NAT64 implementation: 
o Modify ipfw(8) to be able set any prefix6 not just Well-Known,
  and also show configured prefix6;
o relocate some definitions and macros into proper place;
o convert nat64_debug and nat64_allow_private variables to be
  VNET-compatible;
o add struct nat64_config that keeps generic configuration needed
  to NAT64 code;
o add nat64_check_prefix6() function to check validness of specified
  by user IPv6 prefix according to RFC6052;
o use nat64_check_private_ip4() and nat64_embed_ip4() functions
  instead of nat64_get_ip4() and nat64_set_ip4() macros. This allows
  to use any configured IPv6 prefixes that are allowed by RFC6052;
o introduce NAT64_WKPFX flag, that is set when IPv6 prefix is
  Well-Known IPv6 prefix. It is used to reduce overhead to check this;
o modify nat64lsn_cfg and nat64stl_cfg structures to use nat64_config
  structure. And respectivelly modify the rest of code;
o remove now unused ro argument from nat64_output() function;
o remove __FreeBSD_version ifdef, NAT64 was not merged to older versions;
o add commented -DIPFIREWALL_NAT64_DIRECT_OUTPUT flag to module's Makefile
  as example.

Obtained from:	Yandex LLC
MFC after:	1 month
Sponsored by:	Yandex LLC
2018-05-09 11:59:24 +00:00

886 lines
24 KiB
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/*-
* Copyright (c) 2015-2016 Yandex LLC
* Copyright (c) 2015-2016 Alexander V. Chernikov <melifaro@FreeBSD.org>
* Copyright (c) 2015-2016 Andrey V. Elsukov <ae@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/socket.h>
#include "ipfw2.h"
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <inttypes.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip_fw.h>
#include <netinet6/ip_fw_nat64.h>
#include <arpa/inet.h>
static void nat64lsn_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name,
uint8_t set);
typedef int (nat64lsn_cb_t)(ipfw_nat64lsn_cfg *cfg, const char *name,
uint8_t set);
static int nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set,
int sort);
static void nat64lsn_create(const char *name, uint8_t set, int ac, char **av);
static void nat64lsn_config(const char *name, uint8_t set, int ac, char **av);
static void nat64lsn_destroy(const char *name, uint8_t set);
static void nat64lsn_stats(const char *name, uint8_t set);
static void nat64lsn_reset_stats(const char *name, uint8_t set);
static int nat64lsn_show_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
uint8_t set);
static int nat64lsn_destroy_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
uint8_t set);
static int nat64lsn_states_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
uint8_t set);
static struct _s_x nat64cmds[] = {
{ "create", TOK_CREATE },
{ "config", TOK_CONFIG },
{ "destroy", TOK_DESTROY },
{ "list", TOK_LIST },
{ "show", TOK_LIST },
{ "stats", TOK_STATS },
{ NULL, 0 }
};
static uint64_t
nat64lsn_print_states(void *buf)
{
char s[INET6_ADDRSTRLEN], a[INET_ADDRSTRLEN], f[INET_ADDRSTRLEN];
char sflags[4], *sf, *proto;
ipfw_obj_header *oh;
ipfw_obj_data *od;
ipfw_nat64lsn_stg *stg;
ipfw_nat64lsn_state *ste;
uint64_t next_idx;
int i, sz;
oh = (ipfw_obj_header *)buf;
od = (ipfw_obj_data *)(oh + 1);
stg = (ipfw_nat64lsn_stg *)(od + 1);
sz = od->head.length - sizeof(*od);
next_idx = 0;
while (sz > 0 && next_idx != 0xFF) {
next_idx = stg->next_idx;
sz -= sizeof(*stg);
if (stg->count == 0) {
stg++;
continue;
}
switch (stg->proto) {
case IPPROTO_TCP:
proto = "TCP";
break;
case IPPROTO_UDP:
proto = "UDP";
break;
case IPPROTO_ICMPV6:
proto = "ICMPv6";
break;
}
inet_ntop(AF_INET6, &stg->host6, s, sizeof(s));
inet_ntop(AF_INET, &stg->alias4, a, sizeof(a));
ste = (ipfw_nat64lsn_state *)(stg + 1);
for (i = 0; i < stg->count && sz > 0; i++) {
sf = sflags;
inet_ntop(AF_INET, &ste->daddr, f, sizeof(f));
if (stg->proto == IPPROTO_TCP) {
if (ste->flags & 0x02)
*sf++ = 'S';
if (ste->flags & 0x04)
*sf++ = 'E';
if (ste->flags & 0x01)
*sf++ = 'F';
}
*sf = '\0';
switch (stg->proto) {
case IPPROTO_TCP:
case IPPROTO_UDP:
printf("%s:%d\t%s:%d\t%s\t%s\t%d\t%s:%d\n",
s, ste->sport, a, ste->aport, proto,
sflags, ste->idle, f, ste->dport);
break;
case IPPROTO_ICMPV6:
printf("%s\t%s\t%s\t\t%d\t%s\n",
s, a, proto, ste->idle, f);
break;
default:
printf("%s\t%s\t%d\t\t%d\t%s\n",
s, a, stg->proto, ste->idle, f);
}
ste++;
sz -= sizeof(*ste);
}
stg = (ipfw_nat64lsn_stg *)ste;
}
return (next_idx);
}
static int
nat64lsn_states_cb(ipfw_nat64lsn_cfg *cfg, const char *name, uint8_t set)
{
ipfw_obj_header *oh;
ipfw_obj_data *od;
void *buf;
uint64_t next_idx;
size_t sz;
if (name != NULL && strcmp(cfg->name, name) != 0)
return (ESRCH);
if (set != 0 && cfg->set != set)
return (ESRCH);
next_idx = 0;
sz = 4096;
if ((buf = calloc(1, sz)) == NULL)
err(EX_OSERR, NULL);
do {
oh = (ipfw_obj_header *)buf;
od = (ipfw_obj_data *)(oh + 1);
nat64lsn_fill_ntlv(&oh->ntlv, cfg->name, set);
od->head.type = IPFW_TLV_OBJDATA;
od->head.length = sizeof(*od) + sizeof(next_idx);
*((uint64_t *)(od + 1)) = next_idx;
if (do_get3(IP_FW_NAT64LSN_LIST_STATES, &oh->opheader, &sz))
err(EX_OSERR, "Error reading nat64lsn states");
next_idx = nat64lsn_print_states(buf);
sz = 4096;
memset(buf, 0, sz);
} while (next_idx != 0xFF);
free(buf);
return (0);
}
static struct _s_x nat64statscmds[] = {
{ "reset", TOK_RESET },
{ NULL, 0 }
};
static void
ipfw_nat64lsn_stats_handler(const char *name, uint8_t set, int ac, char *av[])
{
int tcmd;
if (ac == 0) {
nat64lsn_stats(name, set);
return;
}
NEED1("nat64lsn stats needs command");
tcmd = get_token(nat64statscmds, *av, "nat64lsn stats command");
switch (tcmd) {
case TOK_RESET:
nat64lsn_reset_stats(name, set);
}
}
static struct _s_x nat64listcmds[] = {
{ "states", TOK_STATES },
{ "config", TOK_CONFIG },
{ NULL, 0 }
};
static void
ipfw_nat64lsn_list_handler(const char *name, uint8_t set, int ac, char *av[])
{
int tcmd;
if (ac == 0) {
nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
return;
}
NEED1("nat64lsn list needs command");
tcmd = get_token(nat64listcmds, *av, "nat64lsn list command");
switch (tcmd) {
case TOK_STATES:
nat64lsn_foreach(nat64lsn_states_cb, name, set, 1);
break;
case TOK_CONFIG:
nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
}
}
/*
* This one handles all nat64lsn-related commands
* ipfw [set N] nat64lsn NAME {create | config} ...
* ipfw [set N] nat64lsn NAME stats
* ipfw [set N] nat64lsn {NAME | all} destroy
* ipfw [set N] nat64lsn {NAME | all} {list | show} [config | states]
*/
#define nat64lsn_check_name table_check_name
void
ipfw_nat64lsn_handler(int ac, char *av[])
{
const char *name;
int tcmd;
uint8_t set;
if (co.use_set != 0)
set = co.use_set - 1;
else
set = 0;
ac--; av++;
NEED1("nat64lsn needs instance name");
name = *av;
if (nat64lsn_check_name(name) != 0) {
if (strcmp(name, "all") == 0)
name = NULL;
else
errx(EX_USAGE, "nat64lsn instance name %s is invalid",
name);
}
ac--; av++;
NEED1("nat64lsn needs command");
tcmd = get_token(nat64cmds, *av, "nat64lsn command");
if (name == NULL && tcmd != TOK_DESTROY && tcmd != TOK_LIST)
errx(EX_USAGE, "nat64lsn instance name required");
switch (tcmd) {
case TOK_CREATE:
ac--; av++;
nat64lsn_create(name, set, ac, av);
break;
case TOK_CONFIG:
ac--; av++;
nat64lsn_config(name, set, ac, av);
break;
case TOK_LIST:
ac--; av++;
ipfw_nat64lsn_list_handler(name, set, ac, av);
break;
case TOK_DESTROY:
if (name == NULL)
nat64lsn_foreach(nat64lsn_destroy_cb, NULL, set, 0);
else
nat64lsn_destroy(name, set);
break;
case TOK_STATS:
ac--; av++;
ipfw_nat64lsn_stats_handler(name, set, ac, av);
}
}
static void
nat64lsn_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set)
{
ntlv->head.type = IPFW_TLV_EACTION_NAME(1); /* it doesn't matter */
ntlv->head.length = sizeof(ipfw_obj_ntlv);
ntlv->idx = 1;
ntlv->set = set;
strlcpy(ntlv->name, name, sizeof(ntlv->name));
}
static void
nat64lsn_apply_mask(int af, void *prefix, uint16_t plen)
{
struct in6_addr mask6, *p6;
struct in_addr mask4, *p4;
if (af == AF_INET) {
p4 = (struct in_addr *)prefix;
mask4.s_addr = htonl(~((1 << (32 - plen)) - 1));
p4->s_addr &= mask4.s_addr;
} else if (af == AF_INET6) {
p6 = (struct in6_addr *)prefix;
n2mask(&mask6, plen);
APPLY_MASK(p6, &mask6);
}
}
static void
nat64lsn_parse_prefix(const char *arg, int af, void *prefix, uint16_t *plen)
{
char *p, *l;
p = strdup(arg);
if (p == NULL)
err(EX_OSERR, NULL);
if ((l = strchr(p, '/')) != NULL)
*l++ = '\0';
if (l == NULL)
errx(EX_USAGE, "Prefix length required");
if (inet_pton(af, p, prefix) != 1)
errx(EX_USAGE, "Bad prefix: %s", p);
*plen = (uint16_t)strtol(l, &l, 10);
if (*l != '\0' || *plen == 0 || (af == AF_INET && *plen > 32) ||
(af == AF_INET6 && *plen > 96))
errx(EX_USAGE, "Bad prefix length: %s", arg);
nat64lsn_apply_mask(af, prefix, *plen);
free(p);
}
static uint32_t
nat64lsn_parse_int(const char *arg, const char *desc)
{
char *p;
uint32_t val;
val = (uint32_t)strtol(arg, &p, 10);
if (*p != '\0')
errx(EX_USAGE, "Invalid %s value: %s\n", desc, arg);
return (val);
}
static struct _s_x nat64newcmds[] = {
{ "prefix6", TOK_PREFIX6 },
{ "agg_len", TOK_AGG_LEN }, /* not yet */
{ "agg_count", TOK_AGG_COUNT }, /* not yet */
{ "port_range", TOK_PORT_RANGE }, /* not yet */
{ "jmaxlen", TOK_JMAXLEN },
{ "prefix4", TOK_PREFIX4 },
{ "max_ports", TOK_MAX_PORTS },
{ "host_del_age", TOK_HOST_DEL_AGE },
{ "pg_del_age", TOK_PG_DEL_AGE },
{ "tcp_syn_age", TOK_TCP_SYN_AGE },
{ "tcp_close_age",TOK_TCP_CLOSE_AGE },
{ "tcp_est_age", TOK_TCP_EST_AGE },
{ "udp_age", TOK_UDP_AGE },
{ "icmp_age", TOK_ICMP_AGE },
{ "log", TOK_LOG },
{ "-log", TOK_LOGOFF },
{ NULL, 0 }
};
/*
* Creates new nat64lsn instance
* ipfw nat64lsn <NAME> create
* [ max_ports <N> ]
* Request: [ ipfw_obj_lheader ipfw_nat64lsn_cfg ]
*/
#define NAT64LSN_HAS_PREFIX4 0x01
#define NAT64LSN_HAS_PREFIX6 0x02
static void
nat64lsn_create(const char *name, uint8_t set, int ac, char **av)
{
char buf[sizeof(ipfw_obj_lheader) + sizeof(ipfw_nat64lsn_cfg)];
ipfw_nat64lsn_cfg *cfg;
ipfw_obj_lheader *olh;
int tcmd, flags;
char *opt;
memset(&buf, 0, sizeof(buf));
olh = (ipfw_obj_lheader *)buf;
cfg = (ipfw_nat64lsn_cfg *)(olh + 1);
/* Some reasonable defaults */
inet_pton(AF_INET6, "64:ff9b::", &cfg->prefix6);
cfg->plen6 = 96;
cfg->set = set;
cfg->max_ports = NAT64LSN_MAX_PORTS;
cfg->jmaxlen = NAT64LSN_JMAXLEN;
cfg->nh_delete_delay = NAT64LSN_HOST_AGE;
cfg->pg_delete_delay = NAT64LSN_PG_AGE;
cfg->st_syn_ttl = NAT64LSN_TCP_SYN_AGE;
cfg->st_estab_ttl = NAT64LSN_TCP_EST_AGE;
cfg->st_close_ttl = NAT64LSN_TCP_FIN_AGE;
cfg->st_udp_ttl = NAT64LSN_UDP_AGE;
cfg->st_icmp_ttl = NAT64LSN_ICMP_AGE;
flags = NAT64LSN_HAS_PREFIX6;
while (ac > 0) {
tcmd = get_token(nat64newcmds, *av, "option");
opt = *av;
ac--; av++;
switch (tcmd) {
case TOK_PREFIX4:
NEED1("IPv4 prefix required");
nat64lsn_parse_prefix(*av, AF_INET, &cfg->prefix4,
&cfg->plen4);
flags |= NAT64LSN_HAS_PREFIX4;
ac--; av++;
break;
case TOK_PREFIX6:
NEED1("IPv6 prefix required");
nat64lsn_parse_prefix(*av, AF_INET6, &cfg->prefix6,
&cfg->plen6);
if (ipfw_check_nat64prefix(&cfg->prefix6,
cfg->plen6) != 0)
errx(EX_USAGE, "Bad prefix6 %s", *av);
ac--; av++;
break;
#if 0
case TOK_AGG_LEN:
NEED1("Aggregation prefix len required");
cfg->agg_prefix_len = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
case TOK_AGG_COUNT:
NEED1("Max per-prefix count required");
cfg->agg_prefix_max = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
case TOK_PORT_RANGE:
NEED1("port range x[:y] required");
if ((p = strchr(*av, ':')) == NULL)
cfg->min_port = (uint16_t)nat64lsn_parse_int(
*av, opt);
else {
*p++ = '\0';
cfg->min_port = (uint16_t)nat64lsn_parse_int(
*av, opt);
cfg->max_port = (uint16_t)nat64lsn_parse_int(
p, opt);
}
ac--; av++;
break;
case TOK_JMAXLEN:
NEED1("job queue length required");
cfg->jmaxlen = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
#endif
case TOK_MAX_PORTS:
NEED1("Max per-user ports required");
cfg->max_ports = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
case TOK_HOST_DEL_AGE:
NEED1("host delete delay required");
cfg->nh_delete_delay = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_PG_DEL_AGE:
NEED1("portgroup delete delay required");
cfg->pg_delete_delay = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_SYN_AGE:
NEED1("tcp syn age required");
cfg->st_syn_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_CLOSE_AGE:
NEED1("tcp close age required");
cfg->st_close_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_EST_AGE:
NEED1("tcp est age required");
cfg->st_estab_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_UDP_AGE:
NEED1("udp age required");
cfg->st_udp_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_ICMP_AGE:
NEED1("icmp age required");
cfg->st_icmp_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_LOG:
cfg->flags |= NAT64_LOG;
break;
case TOK_LOGOFF:
cfg->flags &= ~NAT64_LOG;
break;
}
}
/* Check validness */
if ((flags & NAT64LSN_HAS_PREFIX4) != NAT64LSN_HAS_PREFIX4)
errx(EX_USAGE, "prefix4 required");
olh->count = 1;
olh->objsize = sizeof(*cfg);
olh->size = sizeof(buf);
strlcpy(cfg->name, name, sizeof(cfg->name));
if (do_set3(IP_FW_NAT64LSN_CREATE, &olh->opheader, sizeof(buf)) != 0)
err(EX_OSERR, "nat64lsn instance creation failed");
}
/*
* Configures existing nat64lsn instance
* ipfw nat64lsn <NAME> config <options>
* Request: [ ipfw_obj_header ipfw_nat64lsn_cfg ]
*/
static void
nat64lsn_config(const char *name, uint8_t set, int ac, char **av)
{
char buf[sizeof(ipfw_obj_header) + sizeof(ipfw_nat64lsn_cfg)];
ipfw_nat64lsn_cfg *cfg;
ipfw_obj_header *oh;
size_t sz;
char *opt;
int tcmd;
if (ac == 0)
errx(EX_USAGE, "config options required");
memset(&buf, 0, sizeof(buf));
oh = (ipfw_obj_header *)buf;
cfg = (ipfw_nat64lsn_cfg *)(oh + 1);
sz = sizeof(buf);
nat64lsn_fill_ntlv(&oh->ntlv, name, set);
if (do_get3(IP_FW_NAT64LSN_CONFIG, &oh->opheader, &sz) != 0)
err(EX_OSERR, "failed to get config for instance %s", name);
while (ac > 0) {
tcmd = get_token(nat64newcmds, *av, "option");
opt = *av;
ac--; av++;
switch (tcmd) {
case TOK_MAX_PORTS:
NEED1("Max per-user ports required");
cfg->max_ports = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
case TOK_JMAXLEN:
NEED1("job queue length required");
cfg->jmaxlen = nat64lsn_parse_int(*av, opt);
ac--; av++;
break;
case TOK_HOST_DEL_AGE:
NEED1("host delete delay required");
cfg->nh_delete_delay = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_PG_DEL_AGE:
NEED1("portgroup delete delay required");
cfg->pg_delete_delay = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_SYN_AGE:
NEED1("tcp syn age required");
cfg->st_syn_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_CLOSE_AGE:
NEED1("tcp close age required");
cfg->st_close_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_TCP_EST_AGE:
NEED1("tcp est age required");
cfg->st_estab_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_UDP_AGE:
NEED1("udp age required");
cfg->st_udp_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_ICMP_AGE:
NEED1("icmp age required");
cfg->st_icmp_ttl = (uint16_t)nat64lsn_parse_int(
*av, opt);
ac--; av++;
break;
case TOK_LOG:
cfg->flags |= NAT64_LOG;
break;
case TOK_LOGOFF:
cfg->flags &= ~NAT64_LOG;
break;
default:
errx(EX_USAGE, "Can't change %s option", opt);
}
}
if (do_set3(IP_FW_NAT64LSN_CONFIG, &oh->opheader, sizeof(buf)) != 0)
err(EX_OSERR, "nat64lsn instance configuration failed");
}
/*
* Reset nat64lsn instance statistics specified by @oh->ntlv.
* Request: [ ipfw_obj_header ]
*/
static void
nat64lsn_reset_stats(const char *name, uint8_t set)
{
ipfw_obj_header oh;
memset(&oh, 0, sizeof(oh));
nat64lsn_fill_ntlv(&oh.ntlv, name, set);
if (do_set3(IP_FW_NAT64LSN_RESET_STATS, &oh.opheader, sizeof(oh)) != 0)
err(EX_OSERR, "failed to reset stats for instance %s", name);
}
/*
* Destroys nat64lsn instance specified by @oh->ntlv.
* Request: [ ipfw_obj_header ]
*/
static void
nat64lsn_destroy(const char *name, uint8_t set)
{
ipfw_obj_header oh;
memset(&oh, 0, sizeof(oh));
nat64lsn_fill_ntlv(&oh.ntlv, name, set);
if (do_set3(IP_FW_NAT64LSN_DESTROY, &oh.opheader, sizeof(oh)) != 0)
err(EX_OSERR, "failed to destroy nat instance %s", name);
}
/*
* Get nat64lsn instance statistics.
* Request: [ ipfw_obj_header ]
* Reply: [ ipfw_obj_header ipfw_obj_ctlv [ uint64_t x N ] ]
*/
static int
nat64lsn_get_stats(const char *name, uint8_t set,
struct ipfw_nat64lsn_stats *stats)
{
ipfw_obj_header *oh;
ipfw_obj_ctlv *oc;
size_t sz;
sz = sizeof(*oh) + sizeof(*oc) + sizeof(*stats);
oh = calloc(1, sz);
nat64lsn_fill_ntlv(&oh->ntlv, name, set);
if (do_get3(IP_FW_NAT64LSN_STATS, &oh->opheader, &sz) == 0) {
oc = (ipfw_obj_ctlv *)(oh + 1);
memcpy(stats, oc + 1, sizeof(*stats));
free(oh);
return (0);
}
free(oh);
return (-1);
}
static void
nat64lsn_stats(const char *name, uint8_t set)
{
struct ipfw_nat64lsn_stats stats;
if (nat64lsn_get_stats(name, set, &stats) != 0)
err(EX_OSERR, "Error retrieving stats");
if (co.use_set != 0 || set != 0)
printf("set %u ", set);
printf("nat64lsn %s\n", name);
printf("\t%ju packets translated from IPv6 to IPv4\n",
(uintmax_t)stats.opcnt64);
printf("\t%ju packets translated from IPv4 to IPv6\n",
(uintmax_t)stats.opcnt46);
printf("\t%ju IPv6 fragments created\n",
(uintmax_t)stats.ofrags);
printf("\t%ju IPv4 fragments received\n",
(uintmax_t)stats.ifrags);
printf("\t%ju output packets dropped due to no bufs, etc.\n",
(uintmax_t)stats.oerrors);
printf("\t%ju output packets discarded due to no IPv4 route\n",
(uintmax_t)stats.noroute4);
printf("\t%ju output packets discarded due to no IPv6 route\n",
(uintmax_t)stats.noroute6);
printf("\t%ju packets discarded due to unsupported protocol\n",
(uintmax_t)stats.noproto);
printf("\t%ju packets discarded due to memory allocation problems\n",
(uintmax_t)stats.nomem);
printf("\t%ju packets discarded due to some errors\n",
(uintmax_t)stats.dropped);
printf("\t%ju packets not matched with IPv4 prefix\n",
(uintmax_t)stats.nomatch4);
printf("\t%ju mbufs queued for post processing\n",
(uintmax_t)stats.jreinjected);
printf("\t%ju times the job queue was processed\n",
(uintmax_t)stats.jcalls);
printf("\t%ju job requests queued\n",
(uintmax_t)stats.jrequests);
printf("\t%ju job requests queue limit reached\n",
(uintmax_t)stats.jmaxlen);
printf("\t%ju job requests failed due to memory allocation problems\n",
(uintmax_t)stats.jnomem);
printf("\t%ju hosts allocated\n", (uintmax_t)stats.hostcount);
printf("\t%ju hosts requested\n", (uintmax_t)stats.jhostsreq);
printf("\t%ju host requests failed\n", (uintmax_t)stats.jhostfails);
printf("\t%ju portgroups requested\n", (uintmax_t)stats.jportreq);
printf("\t%ju portgroups allocated\n", (uintmax_t)stats.spgcreated);
printf("\t%ju portgroups deleted\n", (uintmax_t)stats.spgdeleted);
printf("\t%ju portgroup requests failed\n",
(uintmax_t)stats.jportfails);
printf("\t%ju portgroups allocated for TCP\n",
(uintmax_t)stats.tcpchunks);
printf("\t%ju portgroups allocated for UDP\n",
(uintmax_t)stats.udpchunks);
printf("\t%ju portgroups allocated for ICMP\n",
(uintmax_t)stats.icmpchunks);
printf("\t%ju states created\n", (uintmax_t)stats.screated);
printf("\t%ju states deleted\n", (uintmax_t)stats.sdeleted);
}
static int
nat64lsn_show_cb(ipfw_nat64lsn_cfg *cfg, const char *name, uint8_t set)
{
char abuf[INET6_ADDRSTRLEN];
if (name != NULL && strcmp(cfg->name, name) != 0)
return (ESRCH);
if (co.use_set != 0 && cfg->set != set)
return (ESRCH);
if (co.use_set != 0 || cfg->set != 0)
printf("set %u ", cfg->set);
inet_ntop(AF_INET, &cfg->prefix4, abuf, sizeof(abuf));
printf("nat64lsn %s prefix4 %s/%u", cfg->name, abuf, cfg->plen4);
inet_ntop(AF_INET6, &cfg->prefix6, abuf, sizeof(abuf));
printf(" prefix6 %s/%u", abuf, cfg->plen6);
#if 0
printf("agg_len %u agg_count %u ", cfg->agg_prefix_len,
cfg->agg_prefix_max);
if (cfg->min_port != NAT64LSN_PORT_MIN ||
cfg->max_port != NAT64LSN_PORT_MAX)
printf(" port_range %u:%u", cfg->min_port, cfg->max_port);
if (cfg->jmaxlen != NAT64LSN_JMAXLEN)
printf(" jmaxlen %u ", cfg->jmaxlen);
#endif
if (cfg->max_ports != NAT64LSN_MAX_PORTS)
printf(" max_ports %u", cfg->max_ports);
if (cfg->nh_delete_delay != NAT64LSN_HOST_AGE)
printf(" host_del_age %u", cfg->nh_delete_delay);
if (cfg->pg_delete_delay != NAT64LSN_PG_AGE)
printf(" pg_del_age %u ", cfg->pg_delete_delay);
if (cfg->st_syn_ttl != NAT64LSN_TCP_SYN_AGE)
printf(" tcp_syn_age %u", cfg->st_syn_ttl);
if (cfg->st_close_ttl != NAT64LSN_TCP_FIN_AGE)
printf(" tcp_close_age %u", cfg->st_close_ttl);
if (cfg->st_estab_ttl != NAT64LSN_TCP_EST_AGE)
printf(" tcp_est_age %u", cfg->st_estab_ttl);
if (cfg->st_udp_ttl != NAT64LSN_UDP_AGE)
printf(" udp_age %u", cfg->st_udp_ttl);
if (cfg->st_icmp_ttl != NAT64LSN_ICMP_AGE)
printf(" icmp_age %u", cfg->st_icmp_ttl);
if (cfg->flags & NAT64_LOG)
printf(" log");
printf("\n");
return (0);
}
static int
nat64lsn_destroy_cb(ipfw_nat64lsn_cfg *cfg, const char *name, uint8_t set)
{
if (co.use_set != 0 && cfg->set != set)
return (ESRCH);
nat64lsn_destroy(cfg->name, cfg->set);
return (0);
}
/*
* Compare nat64lsn instances names.
* Honor number comparison.
*/
static int
nat64name_cmp(const void *a, const void *b)
{
ipfw_nat64lsn_cfg *ca, *cb;
ca = (ipfw_nat64lsn_cfg *)a;
cb = (ipfw_nat64lsn_cfg *)b;
if (ca->set > cb->set)
return (1);
else if (ca->set < cb->set)
return (-1);
return (stringnum_cmp(ca->name, cb->name));
}
/*
* Retrieves nat64lsn instance list from kernel,
* optionally sorts it and calls requested function for each instance.
*
* Request: [ ipfw_obj_lheader ]
* Reply: [ ipfw_obj_lheader ipfw_nat64lsn_cfg x N ]
*/
static int
nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set, int sort)
{
ipfw_obj_lheader *olh;
ipfw_nat64lsn_cfg *cfg;
size_t sz;
int i, error;
/* Start with reasonable default */
sz = sizeof(*olh) + 16 * sizeof(ipfw_nat64lsn_cfg);
for (;;) {
if ((olh = calloc(1, sz)) == NULL)
return (ENOMEM);
olh->size = sz;
if (do_get3(IP_FW_NAT64LSN_LIST, &olh->opheader, &sz) != 0) {
sz = olh->size;
free(olh);
if (errno != ENOMEM)
return (errno);
continue;
}
if (sort != 0)
qsort(olh + 1, olh->count, olh->objsize,
nat64name_cmp);
cfg = (ipfw_nat64lsn_cfg *)(olh + 1);
for (i = 0; i < olh->count; i++) {
error = f(cfg, name, set); /* Ignore errors for now */
cfg = (ipfw_nat64lsn_cfg *)((caddr_t)cfg +
olh->objsize);
}
free(olh);
break;
}
return (0);
}
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