/*
* Lists all nat64 lsn instances currently available in kernel.
* Data layout (v0)(current):
* Request: [ ipfw_obj_lheader ]
* Reply: [ ipfw_obj_lheader ipfw_nat64lsn_cfg x N ]
*
* Returns 0 on success
*/
static int
nat64lsn_list(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
ipfw_obj_lheader *olh;
struct nat64_dump_arg da;
/* Check minimum header size */
if (sd->valsize < sizeof(ipfw_obj_lheader))
return (EINVAL);
olh = (ipfw_obj_lheader *)ipfw_get_sopt_header(sd, sizeof(*olh));
IPFW_UH_RLOCK(ch);
olh->count = ipfw_objhash_count_type(CHAIN_TO_SRV(ch),
IPFW_TLV_NAT64LSN_NAME);
olh->objsize = sizeof(ipfw_nat64lsn_cfg);
olh->size = sizeof(*olh) + olh->count * olh->objsize;
if (sd->valsize < olh->size) {
IPFW_UH_RUNLOCK(ch);
return (ENOMEM);
}
memset(&da, 0, sizeof(da));
da.ch = ch;
da.sd = sd;
ipfw_objhash_foreach_type(CHAIN_TO_SRV(ch), export_config_cb, &da,
IPFW_TLV_NAT64LSN_NAME);
IPFW_UH_RUNLOCK(ch);
return (0);
}
/*
* Dumps all shared/table value data
* Data layout (v1)(current):
* Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size
* Reply: [ ipfw_obj_lheader ipfw_table_value x N ]
*
* Returns 0 on success
*/
static int
list_table_values(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
struct _ipfw_obj_lheader *olh;
struct namedobj_instance *vi;
struct vdump_args da;
uint32_t count, size;
olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh));
if (olh == NULL)
return (EINVAL);
if (sd->valsize < olh->size)
return (EINVAL);
IPFW_UH_RLOCK(ch);
vi = CHAIN_TO_VI(ch);
count = ipfw_objhash_count(vi);
size = count * sizeof(ipfw_table_value) + sizeof(ipfw_obj_lheader);
/* Fill in header regadless of buffer size */
olh->count = count;
olh->objsize = sizeof(ipfw_table_value);
if (size > olh->size) {
olh->size = size;
IPFW_UH_RUNLOCK(ch);
return (ENOMEM);
}
olh->size = size;
/*
* Do the actual value dump
*/
memset(&da, 0, sizeof(da));
da.ch = ch;
da.sd = sd;
ipfw_objhash_foreach(vi, dump_tvalue, &da);
IPFW_UH_RUNLOCK(ch);
return (0);
}
/*
* Lists all interface currently tracked by ipfw.
* Data layout (v0)(current):
* Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size
* Reply: [ ipfw_obj_lheader ipfw_iface_info x N ]
*
* Returns 0 on success
*/
static int
list_ifaces(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
struct namedobj_instance *ii;
struct _ipfw_obj_lheader *olh;
struct dump_iface_args da;
uint32_t count, size;
olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh));
if (olh == NULL)
return (EINVAL);
if (sd->valsize < olh->size)
return (EINVAL);
IPFW_UH_RLOCK(ch);
ii = CHAIN_TO_II(ch);
if (ii != NULL)
count = ipfw_objhash_count(ii);
else
count = 0;
size = count * sizeof(ipfw_iface_info) + sizeof(ipfw_obj_lheader);
/* Fill in header regadless of buffer size */
olh->count = count;
olh->objsize = sizeof(ipfw_iface_info);
if (size > olh->size) {
olh->size = size;
IPFW_UH_RUNLOCK(ch);
return (ENOMEM);
}
olh->size = size;
da.ch = ch;
da.sd = sd;
if (ii != NULL)
ipfw_objhash_foreach(ii, export_iface_internal, &da);
IPFW_UH_RUNLOCK(ch);
return (0);
}
/*
* Get nat64lsn statistics.
* Data layout (v0)(current):
* Request: [ ipfw_obj_header ]
* Reply: [ ipfw_obj_header ipfw_counter_tlv ]
*
* Returns 0 on success
*/
static int
nat64lsn_stats(struct ip_fw_chain *ch, ip_fw3_opheader *op,
struct sockopt_data *sd)
{
struct ipfw_nat64lsn_stats stats;
struct nat64lsn_cfg *cfg;
ipfw_obj_header *oh;
ipfw_obj_ctlv *ctlv;
size_t sz;
sz = sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ctlv) + sizeof(stats);
if (sd->valsize % sizeof(uint64_t))
return (EINVAL);
if (sd->valsize < sz)
return (ENOMEM);
oh = (ipfw_obj_header *)ipfw_get_sopt_header(sd, sz);
if (oh == NULL)
return (EINVAL);
memset(&stats, 0, sizeof(stats));
IPFW_UH_RLOCK(ch);
cfg = nat64lsn_find(CHAIN_TO_SRV(ch), oh->ntlv.name, oh->ntlv.set);
if (cfg == NULL) {
IPFW_UH_RUNLOCK(ch);
return (ESRCH);
}
export_stats(ch, cfg, &stats);
IPFW_UH_RUNLOCK(ch);
ctlv = (ipfw_obj_ctlv *)(oh + 1);
memset(ctlv, 0, sizeof(*ctlv));
ctlv->head.type = IPFW_TLV_COUNTERS;
ctlv->head.length = sz - sizeof(ipfw_obj_header);
ctlv->count = sizeof(stats) / sizeof(uint64_t);
ctlv->objsize = sizeof(uint64_t);
ctlv->version = IPFW_NAT64_VERSION;
memcpy(ctlv + 1, &stats, sizeof(stats));
return (0);
}
/*
* Lists nat64lsn states.
* Data layout (v0)(current):
* Request: [ ipfw_obj_header ipfw_obj_data [ uint64_t ]]
* Reply: [ ipfw_obj_header ipfw_obj_data [
* ipfw_nat64lsn_stg ipfw_nat64lsn_state x N] ]
*
* Returns 0 on success
*/
static int
nat64lsn_states(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
ipfw_obj_header *oh;
ipfw_obj_data *od;
ipfw_nat64lsn_stg *stg;
struct nat64lsn_cfg *cfg;
struct nat64lsn_portgroup *pg, *pg_next;
uint64_t next_idx;
size_t sz;
uint32_t addr, states;
uint16_t port;
uint8_t nat_proto;
sz = sizeof(ipfw_obj_header) + sizeof(ipfw_obj_data) +
sizeof(uint64_t);
/* Check minimum header size */
if (sd->valsize < sz)
return (EINVAL);
oh = (ipfw_obj_header *)sd->kbuf;
od = (ipfw_obj_data *)(oh + 1);
if (od->head.type != IPFW_TLV_OBJDATA ||
od->head.length != sz - sizeof(ipfw_obj_header))
return (EINVAL);
next_idx = *(uint64_t *)(od + 1);
/* Translate index to the request position to start from */
UNPACK_IDX(next_idx, addr, nat_proto, port);
if (nat_proto >= NAT_MAX_PROTO)
return (EINVAL);
if (nat_proto == 0 && addr != 0)
return (EINVAL);
IPFW_UH_RLOCK(ch);
cfg = nat64lsn_find(CHAIN_TO_SRV(ch), oh->ntlv.name, oh->ntlv.set);
if (cfg == NULL) {
IPFW_UH_RUNLOCK(ch);
return (ESRCH);
}
/* Fill in starting point */
if (addr == 0) {
addr = cfg->prefix4;
nat_proto = 1;
port = 0;
}
if (addr < cfg->prefix4 || addr > cfg->pmask4) {
IPFW_UH_RUNLOCK(ch);
DPRINTF(DP_GENERIC | DP_STATE, "XXX: %lu %u %u",
next_idx, addr, cfg->pmask4);
return (EINVAL);
}
sz = sizeof(ipfw_obj_header) + sizeof(ipfw_obj_data) +
sizeof(ipfw_nat64lsn_stg);
if (sd->valsize < sz)
return (ENOMEM);
oh = (ipfw_obj_header *)ipfw_get_sopt_space(sd, sz);
od = (ipfw_obj_data *)(oh + 1);
od->head.type = IPFW_TLV_OBJDATA;
od->head.length = sz - sizeof(ipfw_obj_header);
stg = (ipfw_nat64lsn_stg *)(od + 1);
pg = get_first_pg(cfg, &addr, &nat_proto, &port);
if (pg == NULL) {
/* No states */
stg->next_idx = 0xFF;
stg->count = 0;
IPFW_UH_RUNLOCK(ch);
return (0);
}
states = 0;
pg_next = NULL;
while (pg != NULL) {
pg_next = get_next_pg(cfg, &addr, &nat_proto, &port);
if (pg_next == NULL)
stg->next_idx = 0xFF;
else
stg->next_idx = PACK_IDX(addr, nat_proto, port);
if (export_pg_states(cfg, pg, stg, sd) != 0) {
IPFW_UH_RUNLOCK(ch);
return (states == 0 ? ENOMEM: 0);
}
states += stg->count;
od->head.length += stg->count * sizeof(ipfw_nat64lsn_state);
sz += stg->count * sizeof(ipfw_nat64lsn_state);
if (pg_next != NULL) {
sz += sizeof(ipfw_nat64lsn_stg);
if (sd->valsize < sz)
break;
stg = (ipfw_nat64lsn_stg *)ipfw_get_sopt_space(sd,
sizeof(ipfw_nat64lsn_stg));
}
pg = pg_next;
}
IPFW_UH_RUNLOCK(ch);
return (0);
}
/*
* Change existing nat64lsn instance configuration.
* Data layout (v0)(current):
* Request: [ ipfw_obj_header ipfw_nat64lsn_cfg ]
* Reply: [ ipfw_obj_header ipfw_nat64lsn_cfg ]
*
* Returns 0 on success
*/
static int
nat64lsn_config(struct ip_fw_chain *ch, ip_fw3_opheader *op,
struct sockopt_data *sd)
{
ipfw_obj_header *oh;
ipfw_nat64lsn_cfg *uc;
struct nat64lsn_cfg *cfg;
struct namedobj_instance *ni;
if (sd->valsize != sizeof(*oh) + sizeof(*uc))
return (EINVAL);
oh = (ipfw_obj_header *)ipfw_get_sopt_space(sd,
sizeof(*oh) + sizeof(*uc));
uc = (ipfw_nat64lsn_cfg *)(oh + 1);
if (ipfw_check_object_name_generic(oh->ntlv.name) != 0 ||
oh->ntlv.set >= IPFW_MAX_SETS)
return (EINVAL);
ni = CHAIN_TO_SRV(ch);
if (sd->sopt->sopt_dir == SOPT_GET) {
IPFW_UH_RLOCK(ch);
cfg = nat64lsn_find(ni, oh->ntlv.name, oh->ntlv.set);
if (cfg == NULL) {
IPFW_UH_RUNLOCK(ch);
return (EEXIST);
}
nat64lsn_export_config(ch, cfg, uc);
IPFW_UH_RUNLOCK(ch);
return (0);
}
nat64lsn_default_config(uc);
IPFW_UH_WLOCK(ch);
cfg = nat64lsn_find(ni, oh->ntlv.name, oh->ntlv.set);
if (cfg == NULL) {
IPFW_UH_WUNLOCK(ch);
return (EEXIST);
}
/*
* For now allow to change only following values:
* jmaxlen, nh_del_age, pg_del_age, tcp_syn_age, tcp_close_age,
* tcp_est_age, udp_age, icmp_age, flags, max_ports.
*/
cfg->max_chunks = uc->max_ports / NAT64_CHUNK_SIZE;
cfg->jmaxlen = uc->jmaxlen;
cfg->nh_delete_delay = uc->nh_delete_delay;
cfg->pg_delete_delay = uc->pg_delete_delay;
cfg->st_syn_ttl = uc->st_syn_ttl;
cfg->st_close_ttl = uc->st_close_ttl;
cfg->st_estab_ttl = uc->st_estab_ttl;
cfg->st_udp_ttl = uc->st_udp_ttl;
cfg->st_icmp_ttl = uc->st_icmp_ttl;
cfg->flags = uc->flags & NAT64LSN_FLAGSMASK;
IPFW_UH_WUNLOCK(ch);
return (0);
}
/*
* Creates new nat64lsn instance.
* Data layout (v0)(current):
* Request: [ ipfw_obj_lheader ipfw_nat64lsn_cfg ]
*
* Returns 0 on success
*/
static int
nat64lsn_create(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
ipfw_obj_lheader *olh;
ipfw_nat64lsn_cfg *uc;
struct nat64lsn_cfg *cfg;
struct namedobj_instance *ni;
uint32_t addr4, mask4;
if (sd->valsize != sizeof(*olh) + sizeof(*uc))
return (EINVAL);
olh = (ipfw_obj_lheader *)sd->kbuf;
uc = (ipfw_nat64lsn_cfg *)(olh + 1);
if (ipfw_check_object_name_generic(uc->name) != 0)
return (EINVAL);
if (uc->agg_prefix_len > 127 || uc->set >= IPFW_MAX_SETS)
return (EINVAL);
if (uc->plen4 > 32)
return (EINVAL);
if (uc->plen6 > 128 || ((uc->plen6 % 8) != 0))
return (EINVAL);
/* XXX: Check prefix4 to be global */
addr4 = ntohl(uc->prefix4.s_addr);
mask4 = ~((1 << (32 - uc->plen4)) - 1);
if ((addr4 & mask4) != addr4)
return (EINVAL);
/* XXX: Check prefix6 */
if (uc->min_port == 0)
uc->min_port = NAT64_MIN_PORT;
if (uc->max_port == 0)
uc->max_port = 65535;
if (uc->min_port > uc->max_port)
return (EINVAL);
uc->min_port = roundup(uc->min_port, NAT64_CHUNK_SIZE);
uc->max_port = roundup(uc->max_port, NAT64_CHUNK_SIZE);
nat64lsn_default_config(uc);
ni = CHAIN_TO_SRV(ch);
IPFW_UH_RLOCK(ch);
if (nat64lsn_find(ni, uc->name, uc->set) != NULL) {
IPFW_UH_RUNLOCK(ch);
return (EEXIST);
}
IPFW_UH_RUNLOCK(ch);
cfg = nat64lsn_init_instance(ch, 1 << (32 - uc->plen4));
strlcpy(cfg->name, uc->name, sizeof(cfg->name));
cfg->no.name = cfg->name;
cfg->no.etlv = IPFW_TLV_NAT64LSN_NAME;
cfg->no.set = uc->set;
cfg->prefix4 = addr4;
cfg->pmask4 = addr4 | ~mask4;
/* XXX: Copy 96 bits */
cfg->plen6 = 96;
memcpy(&cfg->prefix6, &uc->prefix6, cfg->plen6 / 8);
cfg->plen4 = uc->plen4;
cfg->flags = uc->flags & NAT64LSN_FLAGSMASK;
cfg->max_chunks = uc->max_ports / NAT64_CHUNK_SIZE;
cfg->agg_prefix_len = uc->agg_prefix_len;
cfg->agg_prefix_max = uc->agg_prefix_max;
cfg->min_chunk = uc->min_port / NAT64_CHUNK_SIZE;
cfg->max_chunk = uc->max_port / NAT64_CHUNK_SIZE;
cfg->jmaxlen = uc->jmaxlen;
cfg->nh_delete_delay = uc->nh_delete_delay;
cfg->pg_delete_delay = uc->pg_delete_delay;
cfg->st_syn_ttl = uc->st_syn_ttl;
cfg->st_close_ttl = uc->st_close_ttl;
cfg->st_estab_ttl = uc->st_estab_ttl;
cfg->st_udp_ttl = uc->st_udp_ttl;
cfg->st_icmp_ttl = uc->st_icmp_ttl;
cfg->nomatch_verdict = IP_FW_DENY;
cfg->nomatch_final = 1; /* Exit outer loop by default */
IPFW_UH_WLOCK(ch);
if (nat64lsn_find(ni, uc->name, uc->set) != NULL) {
IPFW_UH_WUNLOCK(ch);
nat64lsn_destroy_instance(cfg);
return (EEXIST);
}
if (ipfw_objhash_alloc_idx(CHAIN_TO_SRV(ch), &cfg->no.kidx) != 0) {
IPFW_UH_WUNLOCK(ch);
nat64lsn_destroy_instance(cfg);
return (ENOSPC);
}
ipfw_objhash_add(CHAIN_TO_SRV(ch), &cfg->no);
/* Okay, let's link data */
IPFW_WLOCK(ch);
SRV_OBJECT(ch, cfg->no.kidx) = cfg;
IPFW_WUNLOCK(ch);
nat64lsn_start_instance(cfg);
IPFW_UH_WUNLOCK(ch);
return (0);
}
