int
ipfw_add_table_entry(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr,
uint8_t mlen, uint32_t value)
{
struct radix_node_head *rnh;
struct table_entry *ent;
struct radix_node *rn;
if (tbl >= IPFW_TABLES_MAX)
return (EINVAL);
rnh = ch->tables[tbl];
ent = malloc(sizeof(*ent), M_IPFW_TBL, M_NOWAIT | M_ZERO);
if (ent == NULL)
return (ENOMEM);
ent->value = value;
KEY_LEN(ent->addr) = KEY_LEN(ent->mask) = 8;
ent->mask.sin_addr.s_addr = htonl(mlen ? ~((1 << (32 - mlen)) - 1) : 0);
ent->addr.sin_addr.s_addr = addr & ent->mask.sin_addr.s_addr;
IPFW_WLOCK(ch);
rn = rnh->rnh_addaddr(&ent->addr, &ent->mask, rnh, (void *)ent);
if (rn == NULL) {
IPFW_WUNLOCK(ch);
free(ent, M_IPFW_TBL);
return (EEXIST);
}
IPFW_WUNLOCK(ch);
return (0);
}
/*
* Destroys nat64 instance.
* Data layout (v0)(current):
* Request: [ ipfw_obj_header ]
*
* Returns 0 on success
*/
static int
nat64lsn_destroy(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd)
{
struct nat64lsn_cfg *cfg;
ipfw_obj_header *oh;
if (sd->valsize != sizeof(*oh))
return (EINVAL);
oh = (ipfw_obj_header *)op3;
IPFW_UH_WLOCK(ch);
cfg = nat64lsn_find(CHAIN_TO_SRV(ch), oh->ntlv.name, oh->ntlv.set);
if (cfg == NULL) {
IPFW_UH_WUNLOCK(ch);
return (ESRCH);
}
if (cfg->no.refcnt > 0) {
IPFW_UH_WUNLOCK(ch);
return (EBUSY);
}
IPFW_WLOCK(ch);
SRV_OBJECT(ch, cfg->no.kidx) = NULL;
IPFW_WUNLOCK(ch);
nat64lsn_detach_config(ch, cfg);
IPFW_UH_WUNLOCK(ch);
nat64lsn_destroy_instance(cfg);
return (0);
}
static int
dyn_create(struct ip_fw_chain *ch, struct tid_info *ti,
uint16_t *pkidx)
{
struct namedobj_instance *ni;
struct dyn_state_obj *obj;
struct named_object *no;
ipfw_obj_ntlv *ntlv;
char *name;
DYN_DEBUG("uidx %d", ti->uidx);
if (ti->uidx != 0) {
if (ti->tlvs == NULL)
return (EINVAL);
ntlv = ipfw_find_name_tlv_type(ti->tlvs, ti->tlen, ti->uidx,
IPFW_TLV_STATE_NAME);
if (ntlv == NULL)
return (EINVAL);
name = ntlv->name;
} else
name = default_state_name;
ni = CHAIN_TO_SRV(ch);
obj = malloc(sizeof(*obj), M_IPFW, M_WAITOK | M_ZERO);
obj->no.name = obj->name;
obj->no.etlv = IPFW_TLV_STATE_NAME;
strlcpy(obj->name, name, sizeof(obj->name));
IPFW_UH_WLOCK(ch);
no = ipfw_objhash_lookup_name_type(ni, 0,
IPFW_TLV_STATE_NAME, name);
if (no != NULL) {
/*
* Object is already created.
* Just return its kidx and bump refcount.
*/
*pkidx = no->kidx;
no->refcnt++;
IPFW_UH_WUNLOCK(ch);
free(obj, M_IPFW);
DYN_DEBUG("\tfound kidx %d", *pkidx);
return (0);
}
if (ipfw_objhash_alloc_idx(ni, &obj->no.kidx) != 0) {
DYN_DEBUG("\talloc_idx failed for %s", name);
IPFW_UH_WUNLOCK(ch);
free(obj, M_IPFW);
return (ENOSPC);
}
ipfw_objhash_add(ni, &obj->no);
IPFW_WLOCK(ch);
SRV_OBJECT(ch, obj->no.kidx) = obj;
IPFW_WUNLOCK(ch);
obj->no.refcnt++;
*pkidx = obj->no.kidx;
IPFW_UH_WUNLOCK(ch);
DYN_DEBUG("\tcreated kidx %d", *pkidx);
return (0);
}
/*
* Called for the removal of each instance.
*/
static int
vnet_ipfw_uninit(const void *unused)
{
struct ip_fw *reap, *rule;
struct ip_fw_chain *chain = &V_layer3_chain;
int i;
V_ipfw_vnet_ready = 0; /* tell new callers to go away */
/*
* disconnect from ipv4, ipv6, layer2 and sockopt.
* Then grab, release and grab again the WLOCK so we make
* sure the update is propagated and nobody will be in.
*/
(void)ipfw_attach_hooks(0 /* detach */);
V_ip_fw_ctl_ptr = NULL;
IPFW_UH_WLOCK(chain);
IPFW_UH_WUNLOCK(chain);
IPFW_UH_WLOCK(chain);
IPFW_WLOCK(chain);
ipfw_dyn_uninit(0); /* run the callout_drain */
IPFW_WUNLOCK(chain);
ipfw_destroy_tables(chain);
reap = NULL;
IPFW_WLOCK(chain);
for (i = 0; i < chain->n_rules; i++) {
rule = chain->map[i];
rule->x_next = reap;
reap = rule;
}
if (chain->map)
free(chain->map, M_IPFW);
IPFW_WUNLOCK(chain);
IPFW_UH_WUNLOCK(chain);
if (reap != NULL)
ipfw_reap_rules(reap);
IPFW_LOCK_DESTROY(chain);
ipfw_dyn_uninit(1); /* free the remaining parts */
return 0;
}
/*
* Interface departure handler.
*/
static void
handle_ifdetach(struct ip_fw_chain *ch, struct ipfw_iface *iif,
uint16_t ifindex)
{
struct ipfw_ifc *ic;
IPFW_UH_WLOCK_ASSERT(ch);
IPFW_WLOCK(ch);
TAILQ_FOREACH(ic, &iif->consumers, next)
ic->cb(ch, ic->cbdata, 0);
IPFW_WUNLOCK(ch);
iif->gencnt++;
iif->resolved = 0;
iif->ifindex = 0;
}
static void
dyn_destroy(struct ip_fw_chain *ch, struct named_object *no)
{
struct dyn_state_obj *obj;
IPFW_UH_WLOCK_ASSERT(ch);
KASSERT(no->refcnt == 1,
("Destroying object '%s' (type %u, idx %u) with refcnt %u",
no->name, no->etlv, no->kidx, no->refcnt));
DYN_DEBUG("kidx %d", no->kidx);
IPFW_WLOCK(ch);
obj = SRV_OBJECT(ch, no->kidx);
SRV_OBJECT(ch, no->kidx) = NULL;
IPFW_WUNLOCK(ch);
ipfw_objhash_del(CHAIN_TO_SRV(ch), no);
ipfw_objhash_free_idx(CHAIN_TO_SRV(ch), no->kidx);
free(obj, M_IPFW);
}
int
ipfw_flush_table(struct ip_fw_chain *ch, uint16_t tbl)
{
struct radix_node_head *rnh, *xrnh;
if (tbl >= V_fw_tables_max)
return (EINVAL);
/*
* We free both (IPv4 and extended) radix trees and
* clear table type here to permit table to be reused
* for different type without module reload
*/
IPFW_WLOCK(ch);
/* Set IPv4 table pointer to zero */
if ((rnh = ch->tables[tbl]) != NULL)
ch->tables[tbl] = NULL;
/* Set extended table pointer to zero */
if ((xrnh = ch->xtables[tbl]) != NULL)
ch->xtables[tbl] = NULL;
/* Zero table type */
ch->tabletype[tbl] = 0;
IPFW_WUNLOCK(ch);
if (rnh != NULL) {
rnh->rnh_walktree(rnh, flush_table_entry, rnh);
rn_detachhead((void **)&rnh);
}
if (xrnh != NULL) {
xrnh->rnh_walktree(xrnh, flush_table_entry, xrnh);
rn_detachhead((void **)&xrnh);
}
return (0);
}
int
ipfw_del_table_entry(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr,
uint8_t mlen)
{
struct radix_node_head *rnh;
struct table_entry *ent;
struct sockaddr_in sa, mask;
if (tbl >= IPFW_TABLES_MAX)
return (EINVAL);
rnh = ch->tables[tbl];
KEY_LEN(sa) = KEY_LEN(mask) = 8;
mask.sin_addr.s_addr = htonl(mlen ? ~((1 << (32 - mlen)) - 1) : 0);
sa.sin_addr.s_addr = addr & mask.sin_addr.s_addr;
IPFW_WLOCK(ch);
ent = (struct table_entry *)rnh->rnh_deladdr(&sa, &mask, rnh);
if (ent == NULL) {
IPFW_WUNLOCK(ch);
return (ESRCH);
}
IPFW_WUNLOCK(ch);
free(ent, M_IPFW_TBL);
return (0);
}
static int
resize_dynamic_table(struct ip_fw_chain *chain, int nbuckets)
{
int i, k, nbuckets_old;
ipfw_dyn_rule *q;
struct ipfw_dyn_bucket *dyn_v, *dyn_v_old;
/* Check if given number is power of 2 and less than 64k */
if ((nbuckets > 65536) || (!powerof2(nbuckets)))
return 1;
CTR3(KTR_NET, "%s: resize dynamic hash: %d -> %d", __func__,
V_curr_dyn_buckets, nbuckets);
/* Allocate and initialize new hash */
dyn_v = malloc(nbuckets * sizeof(ipfw_dyn_rule), M_IPFW,
M_WAITOK | M_ZERO);
for (i = 0 ; i < nbuckets; i++)
IPFW_BUCK_LOCK_INIT(&dyn_v[i]);
/*
* Call upper half lock, as get_map() do to ease
* read-only access to dynamic rules hash from sysctl
*/
IPFW_UH_WLOCK(chain);
/*
* Acquire chain write lock to permit hash access
* for main traffic path without additional locks
*/
IPFW_WLOCK(chain);
/* Save old values */
nbuckets_old = V_curr_dyn_buckets;
dyn_v_old = V_ipfw_dyn_v;
/* Skip relinking if array is not set up */
if (V_ipfw_dyn_v == NULL)
V_curr_dyn_buckets = 0;
/* Re-link all dynamic states */
for (i = 0 ; i < V_curr_dyn_buckets ; i++) {
while (V_ipfw_dyn_v[i].head != NULL) {
/* Remove from current chain */
q = V_ipfw_dyn_v[i].head;
V_ipfw_dyn_v[i].head = q->next;
/* Get new hash value */
k = hash_packet(&q->id, nbuckets);
q->bucket = k;
/* Add to the new head */
q->next = dyn_v[k].head;
dyn_v[k].head = q;
}
}
/* Update current pointers/buckets values */
V_curr_dyn_buckets = nbuckets;
V_ipfw_dyn_v = dyn_v;
IPFW_WUNLOCK(chain);
IPFW_UH_WUNLOCK(chain);
/* Start periodic callout on initial creation */
if (dyn_v_old == NULL) {
callout_reset_on(&V_ipfw_timeout, hz, ipfw_dyn_tick, curvnet, 0);
return (0);
}
/* Destroy all mutexes */
for (i = 0 ; i < nbuckets_old ; i++)
IPFW_BUCK_LOCK_DESTROY(&dyn_v_old[i]);
/* Free old hash */
free(dyn_v_old, M_IPFW);
return 0;
}
int
ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables)
{
struct radix_node_head **tables, **xtables, *rnh;
struct radix_node_head **tables_old, **xtables_old;
uint8_t *tabletype, *tabletype_old;
unsigned int ntables_old, tbl;
/* Check new value for validity */
if (ntables > IPFW_TABLES_MAX)
ntables = IPFW_TABLES_MAX;
/* Allocate new pointers */
tables = malloc(ntables * sizeof(void *), M_IPFW, M_WAITOK | M_ZERO);
xtables = malloc(ntables * sizeof(void *), M_IPFW, M_WAITOK | M_ZERO);
tabletype = malloc(ntables * sizeof(uint8_t), M_IPFW, M_WAITOK | M_ZERO);
IPFW_WLOCK(ch);
tbl = (ntables >= V_fw_tables_max) ? V_fw_tables_max : ntables;
/* Copy old table pointers */
memcpy(tables, ch->tables, sizeof(void *) * tbl);
memcpy(xtables, ch->xtables, sizeof(void *) * tbl);
memcpy(tabletype, ch->tabletype, sizeof(uint8_t) * tbl);
/* Change pointers and number of tables */
tables_old = ch->tables;
xtables_old = ch->xtables;
tabletype_old = ch->tabletype;
ch->tables = tables;
ch->xtables = xtables;
ch->tabletype = tabletype;
ntables_old = V_fw_tables_max;
V_fw_tables_max = ntables;
IPFW_WUNLOCK(ch);
/* Check if we need to destroy radix trees */
if (ntables < ntables_old) {
for (tbl = ntables; tbl < ntables_old; tbl++) {
if ((rnh = tables_old[tbl]) != NULL) {
rnh->rnh_walktree(rnh, flush_table_entry, rnh);
rn_detachhead((void **)&rnh);
}
if ((rnh = xtables_old[tbl]) != NULL) {
rnh->rnh_walktree(rnh, flush_table_entry, rnh);
rn_detachhead((void **)&rnh);
}
}
}
/* Free old pointers */
free(tables_old, M_IPFW);
free(xtables_old, M_IPFW);
free(tabletype_old, M_IPFW);
return (0);
}
int
ipfw_del_table_entry(struct ip_fw_chain *ch, uint16_t tbl, void *paddr,
uint8_t plen, uint8_t mlen, uint8_t type)
{
struct radix_node_head *rnh, **rnh_ptr;
struct table_entry *ent;
in_addr_t addr;
struct sockaddr_in sa, mask;
struct sockaddr *sa_ptr, *mask_ptr;
char c;
if (tbl >= V_fw_tables_max)
return (EINVAL);
switch (type) {
case IPFW_TABLE_CIDR:
if (plen == sizeof(in_addr_t)) {
/* Set 'total' structure length */
KEY_LEN(sa) = KEY_LEN_INET;
KEY_LEN(mask) = KEY_LEN_INET;
mask.sin_addr.s_addr = htonl(mlen ? ~((1 << (32 - mlen)) - 1) : 0);
addr = *((in_addr_t *)paddr);
sa.sin_addr.s_addr = addr & mask.sin_addr.s_addr;
rnh_ptr = &ch->tables[tbl];
sa_ptr = (struct sockaddr *)&sa;
mask_ptr = (struct sockaddr *)&mask;
#ifdef INET6
} else if (plen == sizeof(struct in6_addr)) {
/* IPv6 case */
if (mlen > 128)
return (EINVAL);
struct sockaddr_in6 sa6, mask6;
memset(&sa6, 0, sizeof(struct sockaddr_in6));
memset(&mask6, 0, sizeof(struct sockaddr_in6));
/* Set 'total' structure length */
KEY_LEN(sa6) = KEY_LEN_INET6;
KEY_LEN(mask6) = KEY_LEN_INET6;
ipv6_writemask(&mask6.sin6_addr, mlen);
memcpy(&sa6.sin6_addr, paddr, sizeof(struct in6_addr));
APPLY_MASK(&sa6.sin6_addr, &mask6.sin6_addr);
rnh_ptr = &ch->xtables[tbl];
sa_ptr = (struct sockaddr *)&sa6;
mask_ptr = (struct sockaddr *)&mask6;
#endif
} else {
/* Unknown CIDR type */
return (EINVAL);
}
break;
case IPFW_TABLE_INTERFACE:
/* Check if string is terminated */
c = ((char *)paddr)[IF_NAMESIZE - 1];
((char *)paddr)[IF_NAMESIZE - 1] = '\0';
if (((mlen = strlen((char *)paddr)) == IF_NAMESIZE - 1) && (c != '\0'))
return (EINVAL);
struct xaddr_iface ifname, ifmask;
memset(&ifname, 0, sizeof(ifname));
/* Include last \0 into comparison */
mlen++;
/* Set 'total' structure length */
KEY_LEN(ifname) = KEY_LEN_IFACE + mlen;
KEY_LEN(ifmask) = KEY_LEN_IFACE + mlen;
/* Assume direct match */
/* FIXME: Add interface pattern matching */
#if 0
memset(ifmask.ifname, 0xFF, IF_NAMESIZE);
mask_ptr = (struct sockaddr *)&ifmask;
#endif
mask_ptr = NULL;
memcpy(ifname.ifname, paddr, mlen);
/* Set pointers */
rnh_ptr = &ch->xtables[tbl];
sa_ptr = (struct sockaddr *)&ifname;
break;
default:
return (EINVAL);
}
IPFW_WLOCK(ch);
if ((rnh = *rnh_ptr) == NULL) {
IPFW_WUNLOCK(ch);
return (ESRCH);
}
if (ch->tabletype[tbl] != type) {
IPFW_WUNLOCK(ch);
return (EINVAL);
}
ent = (struct table_entry *)rnh->rnh_deladdr(sa_ptr, mask_ptr, rnh);
IPFW_WUNLOCK(ch);
if (ent == NULL)
return (ESRCH);
free(ent, M_IPFW_TBL);
return (0);
}
int
ipfw_add_table_entry(struct ip_fw_chain *ch, uint16_t tbl, void *paddr,
uint8_t plen, uint8_t mlen, uint8_t type, uint32_t value)
{
struct radix_node_head *rnh, **rnh_ptr;
struct table_entry *ent;
struct table_xentry *xent;
struct radix_node *rn;
in_addr_t addr;
int offset;
void *ent_ptr;
struct sockaddr *addr_ptr, *mask_ptr;
char c;
if (tbl >= V_fw_tables_max)
return (EINVAL);
switch (type) {
case IPFW_TABLE_CIDR:
if (plen == sizeof(in_addr_t)) {
#ifdef INET
/* IPv4 case */
if (mlen > 32)
return (EINVAL);
ent = malloc(sizeof(*ent), M_IPFW_TBL, M_WAITOK | M_ZERO);
ent->value = value;
/* Set 'total' structure length */
KEY_LEN(ent->addr) = KEY_LEN_INET;
KEY_LEN(ent->mask) = KEY_LEN_INET;
/* Set offset of IPv4 address in bits */
offset = OFF_LEN_INET;
ent->mask.sin_addr.s_addr = htonl(mlen ? ~((1 << (32 - mlen)) - 1) : 0);
addr = *((in_addr_t *)paddr);
ent->addr.sin_addr.s_addr = addr & ent->mask.sin_addr.s_addr;
/* Set pointers */
rnh_ptr = &ch->tables[tbl];
ent_ptr = ent;
addr_ptr = (struct sockaddr *)&ent->addr;
mask_ptr = (struct sockaddr *)&ent->mask;
#endif
#ifdef INET6
} else if (plen == sizeof(struct in6_addr)) {
/* IPv6 case */
if (mlen > 128)
return (EINVAL);
xent = malloc(sizeof(*xent), M_IPFW_TBL, M_WAITOK | M_ZERO);
xent->value = value;
/* Set 'total' structure length */
KEY_LEN(xent->a.addr6) = KEY_LEN_INET6;
KEY_LEN(xent->m.mask6) = KEY_LEN_INET6;
/* Set offset of IPv6 address in bits */
offset = OFF_LEN_INET6;
ipv6_writemask(&xent->m.mask6.sin6_addr, mlen);
memcpy(&xent->a.addr6.sin6_addr, paddr, sizeof(struct in6_addr));
APPLY_MASK(&xent->a.addr6.sin6_addr, &xent->m.mask6.sin6_addr);
/* Set pointers */
rnh_ptr = &ch->xtables[tbl];
ent_ptr = xent;
addr_ptr = (struct sockaddr *)&xent->a.addr6;
mask_ptr = (struct sockaddr *)&xent->m.mask6;
#endif
} else {
/* Unknown CIDR type */
return (EINVAL);
}
break;
case IPFW_TABLE_INTERFACE:
/* Check if string is terminated */
c = ((char *)paddr)[IF_NAMESIZE - 1];
((char *)paddr)[IF_NAMESIZE - 1] = '\0';
if (((mlen = strlen((char *)paddr)) == IF_NAMESIZE - 1) && (c != '\0'))
return (EINVAL);
/* Include last \0 into comparison */
mlen++;
xent = malloc(sizeof(*xent), M_IPFW_TBL, M_WAITOK | M_ZERO);
xent->value = value;
/* Set 'total' structure length */
KEY_LEN(xent->a.iface) = KEY_LEN_IFACE + mlen;
KEY_LEN(xent->m.ifmask) = KEY_LEN_IFACE + mlen;
/* Set offset of interface name in bits */
offset = OFF_LEN_IFACE;
memcpy(xent->a.iface.ifname, paddr, mlen);
/* Assume direct match */
/* TODO: Add interface pattern matching */
#if 0
memset(xent->m.ifmask.ifname, 0xFF, IF_NAMESIZE);
mask_ptr = (struct sockaddr *)&xent->m.ifmask;
#endif
/* Set pointers */
rnh_ptr = &ch->xtables[tbl];
ent_ptr = xent;
addr_ptr = (struct sockaddr *)&xent->a.iface;
mask_ptr = NULL;
break;
default:
return (EINVAL);
}
IPFW_WLOCK(ch);
/* Check if tabletype is valid */
if ((ch->tabletype[tbl] != 0) && (ch->tabletype[tbl] != type)) {
IPFW_WUNLOCK(ch);
free(ent_ptr, M_IPFW_TBL);
return (EINVAL);
}
/* Check if radix tree exists */
if ((rnh = *rnh_ptr) == NULL) {
IPFW_WUNLOCK(ch);
/* Create radix for a new table */
if (!rn_inithead((void **)&rnh, offset)) {
free(ent_ptr, M_IPFW_TBL);
return (ENOMEM);
}
IPFW_WLOCK(ch);
if (*rnh_ptr != NULL) {
/* Tree is already attached by other thread */
rn_detachhead((void **)&rnh);
rnh = *rnh_ptr;
/* Check table type another time */
if (ch->tabletype[tbl] != type) {
IPFW_WUNLOCK(ch);
free(ent_ptr, M_IPFW_TBL);
return (EINVAL);
}
} else {
*rnh_ptr = rnh;
/*
* Set table type. It can be set already
* (if we have IPv6-only table) but setting
* it another time does not hurt
*/
ch->tabletype[tbl] = type;
}
}
rn = rnh->rnh_addaddr(addr_ptr, mask_ptr, rnh, ent_ptr);
IPFW_WUNLOCK(ch);
if (rn == NULL) {
free(ent_ptr, M_IPFW_TBL);
return (EEXIST);
}
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);
}
/*
* Grows value storage shared among all tables.
* Drops/reacquires UH locks.
* Notifies other running adds on @ch shared storage resize.
* Note function does not guarantee that free space
* will be available after invocation, so one caller needs
* to roll cycle himself.
*
* Returns 0 if case of no errors.
*/
static int
resize_shared_value_storage(struct ip_fw_chain *ch)
{
struct tables_config *tcfg;
struct namedobj_instance *vi;
struct table_value *pval, *valuestate, *old_valuestate;
void *new_idx;
struct vdump_args da;
int new_blocks;
int val_size, val_size_old;
IPFW_UH_WLOCK_ASSERT(ch);
valuestate = NULL;
new_idx = NULL;
pval = (struct table_value *)ch->valuestate;
vi = CHAIN_TO_VI(ch);
tcfg = CHAIN_TO_TCFG(ch);
val_size = tcfg->val_size * 2;
if (val_size == (1 << 30))
return (ENOSPC);
IPFW_UH_WUNLOCK(ch);
valuestate = malloc(sizeof(struct table_value) * val_size, M_IPFW,
M_WAITOK | M_ZERO);
ipfw_objhash_bitmap_alloc(val_size, (void *)&new_idx,
&new_blocks);
IPFW_UH_WLOCK(ch);
/*
* Check if we still need to resize
*/
if (tcfg->val_size >= val_size)
goto done;
/* Update pointers and notify everyone we're changing @ch */
pval = (struct table_value *)ch->valuestate;
rollback_toperation_state(ch, ch);
/* Good. Let's merge */
memcpy(valuestate, pval, sizeof(struct table_value) * tcfg->val_size);
ipfw_objhash_bitmap_merge(CHAIN_TO_VI(ch), &new_idx, &new_blocks);
IPFW_WLOCK(ch);
/* Change pointers */
old_valuestate = ch->valuestate;
ch->valuestate = valuestate;
valuestate = old_valuestate;
ipfw_objhash_bitmap_swap(CHAIN_TO_VI(ch), &new_idx, &new_blocks);
val_size_old = tcfg->val_size;
tcfg->val_size = val_size;
val_size = val_size_old;
IPFW_WUNLOCK(ch);
/* Update pointers to reflect resize */
memset(&da, 0, sizeof(da));
da.pval = (struct table_value *)ch->valuestate;
ipfw_objhash_foreach(vi, update_tvalue, &da);
done:
free(valuestate, M_IPFW);
ipfw_objhash_bitmap_free(new_idx, new_blocks);
return (0);
}