static int
dyn_findbyname(struct ip_fw_chain *ch, struct tid_info *ti,
struct named_object **pno)
{
ipfw_obj_ntlv *ntlv;
const char *name;
DYN_DEBUG("uidx %d", ti->uidx);
if (ti->uidx != 0) {
if (ti->tlvs == NULL)
return (EINVAL);
/* Search ntlv in the buffer provided by user */
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;
/*
* Search named object with corresponding name.
* Since states objects are global - ignore the set value
* and use zero instead.
*/
*pno = ipfw_objhash_lookup_name_type(CHAIN_TO_SRV(ch), 0,
IPFW_TLV_STATE_NAME, name);
/*
* We always return success here.
* The caller will check *pno and mark object as unresolved,
* then it will automatically create "default" object.
*/
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);
}
static struct nat64lsn_cfg *
nat64lsn_find(struct namedobj_instance *ni, const char *name, uint8_t set)
{
struct nat64lsn_cfg *cfg;
cfg = (struct nat64lsn_cfg *)ipfw_objhash_lookup_name_type(ni, set,
IPFW_TLV_NAT64LSN_NAME, name);
return (cfg);
}
