WIP to help bringup NAT flows

*** 49,58 ****
--- 49,59 ----
          list_node_t vxnr_link;
          /* refheld link, or if NULL, this rule is "condemned" and no good. */
          struct vxlnat_vnet_s *vxnr_vnet;
          in6_addr_t vxnr_myaddr;
          in6_addr_t vxnr_pubaddr;
+         /* XXX KEBE ASKS, ire? */
          uint8_t vxnr_myether[ETHERADDRL];
          uint16_t vxnr_vlanid;   /* Fabrics use this too. */
          uint32_t vxnr_refcount;
          uint8_t vxnr_prefix;
  } vxlnat_rule_t;
*** 69,79 ****
  extern void vxlnat_rule_free(vxlnat_rule_t *);
  
  /*
   * NAT FLOWS.  These are per-vnet, and keyed/searched by:
   * <inner-IP-source,IP-dest,inner-source-port,dest-port,protocol>.
!  * They will be tied-to/part-of
   */
  typedef struct vxlnat_flow_s {
          avl_node_t vxnfl_treenode;
          /*
           * I'm guessing that dst varies more than src.  Also
--- 70,80 ----
  extern void vxlnat_rule_free(vxlnat_rule_t *);
  
  /*
   * NAT FLOWS.  These are per-vnet, and keyed/searched by:
   * <inner-IP-source,IP-dest,inner-source-port,dest-port,protocol>.
!  * They will be tied-to/part-of a conn_t.
   */
  typedef struct vxlnat_flow_s {
          avl_node_t vxnfl_treenode;
          /*
           * I'm guessing that dst varies more than src.  Also
*** 84,104 ****
--- 85,122 ----
          in6_addr_t vxnfl_src;   /* INNER source address. */
          uint32_t vxnfl_ports;
          uint8_t vxnfl_protocol;
          uint8_t vxnfl_isv4 : 1, /* Will save us 12 bytes of compares... */
                  vxlfl_reserved1 : 7;
+         /* Theoretically 16 bits lies where this comment is. */
+         uint32_t vxnfl_refcount;
          conn_t *vxnfl_connp;    /* Question - embed instead? */
          vxlnat_rule_t *vxnfl_rule; /* Refhold to rule that generated me. */
+         /*
+          * XXX KEBE SAYS Other NAT-state belongs here too.  Like time-values
+          * for timeouts, and more!
+          */
  } vxlnat_flow_t;
  /* Exploit endianisms, maintain network order... */
  #ifdef _BIG_ENDIAN
  #define VXNFL_SPORT(ports) (uint16_t)((ports) >> 16) /* Unsigned all around. */
  #define VXNFL_DPORT(ports) ((ports) & 0xFFFF)
  #else
  #define VXNFL_SPORT(ports) ((ports) & 0xFFFF)
  #define VXNFL_DPORT(ports) (uint16_t)((ports) >> 16) /* Unsigned all around. */
  #endif
+ #define VXNFL_REFHOLD(vxnfl) {                  \
+         atomic_inc_32(&(vxnfl)->vxnfl_refcount);        \
+         ASSERT((vxnfl)->vxnfl_refcount > 0);    \
+ }
+ #define VXNFL_REFRELE(vxnfl) {                                  \
+         ASSERT((vxnfl)->vxnfl_refcount > 0);                    \
+         membar_exit();                                          \
+         if (atomic_dec_32_nv(&(vxnfl)->vxnfl_refcount) == 0)    \
+                 vxlnat_flow_free(vxnfl);                        \
+ }
+ extern void vxlnat_flow_free(vxlnat_flow_t *);
  
  /*
   * 1-1 IP mapping.
   */
  typedef struct vxlnat_fixed_s {
*** 261,270 ****
--- 279,293 ----
  extern int vxlnat_fixed_ire_send_v4(ire_t *, mblk_t *, void *,
      ip_xmit_attr_t *, uint32_t *);
  extern int vxlnat_fixed_ire_send_v6(ire_t *, mblk_t *, void *,
      ip_xmit_attr_t *, uint32_t *);
  
+ extern boolean_t vxlnat_new_conn(vxlnat_flow_t *);
+ extern void vxlnat_activate_conn(vxlnat_flow_t *);
+ #ifdef notyet
+ extern void vxlnat_deactivate_conn(vxlnat_flow_t *);
+ #endif
  
  extern vxlnat_vnet_t *vxlnat_get_vnet(uint32_t, boolean_t);
  
  #ifdef __cplusplus
  }