dccp: build fixes, mdb (vfs sonode missing)

*** 45,54 ****
--- 45,55 ----
  #include <sys/socketvar.h>
  #include <sys/cred_impl.h>
  #include <inet/udp_impl.h>
  #include <inet/rawip_impl.h>
  #include <inet/mi.h>
+ #include <inet/dccp_impl.h>
  #include <fs/sockfs/socktpi_impl.h>
  #include <net/bridge_impl.h>
  #include <io/trill_impl.h>
  #include <sys/mac_impl.h>
  
*** 140,149 ****
--- 141,174 ----
          }
          kaddr = (uintptr_t)nss.netstack_modules[NS_UDP];
          return (wsp->walk_callback(kaddr, wsp->walk_layer, wsp->walk_cbdata));
  }
  
+ int
+ dccp_stacks_walk_init(mdb_walk_state_t *wsp)
+ {
+         if (mdb_layered_walk("netstack", wsp) == -1) {
+                 mdb_warn("can't walk 'netstack'");
+                 return (WALK_ERR);
+         }
+         return (WALK_NEXT);
+ }
+ 
+ int
+ dccp_stacks_walk_step(mdb_walk_state_t *wsp)
+ {
+         uintptr_t kaddr;
+         netstack_t nss;
+ 
+         if (mdb_vread(&nss, sizeof (nss), wsp->walk_addr) == -1) {
+                 mdb_warn("can't read netstack at %p", wsp->walk_addr);
+                 return (WALK_ERR);
+         }
+         kaddr = (uintptr_t)nss.netstack_modules[NS_DCCP];
+         return (wsp->walk_callback(kaddr, wsp->walk_layer, wsp->walk_cbdata));
+ }
+ 
  /*
   * Print an IPv4 address and port number in a compact and easy to read format
   * The arguments are in network byte order
   */
  static void
*** 205,214 ****
--- 230,260 ----
  net_udp_ipv6(const udp_t *udp)
  {
          return (udp->udp_connp->conn_ipversion == IPV6_VERSION);
  }
  
+ static int
+ net_dccp_active(const dccp_t *dccp)
+ {
+         return ((dccp->dccp_state == TS_IDLE) ||
+             (dccp->dccp_state == TS_DATA_XFER));
+ }
+ 
+ static int
+ net_dccp_ipv4(const dccp_t *dccp)
+ {
+         return ((dccp->dccp_connp->conn_ipversion == IPV4_VERSION) ||
+             (IN6_IS_ADDR_UNSPECIFIED(&dccp->dccp_connp->conn_laddr_v6) &&
+             (dccp->dccp_state <= DCCPS_LISTEN)));
+ }
+ 
+ static int
+ net_dccp_ipv6(const dccp_t *dccp)
+ {
+         return (dccp->dccp_connp->conn_ipversion == IPV6_VERSION);
+ }
+ 
  int
  sonode_walk_init(mdb_walk_state_t *wsp)
  {
          if (wsp->walk_addr == NULL) {
                  GElf_Sym sym;
*** 743,752 ****
--- 789,858 ----
          mdb_printf(" %4i\n", connp->conn_zoneid);
  
          return (WALK_NEXT);
  }
  
+ static void
+ netstat_dccp_verbose_pr(const dccp_t *dccp)
+ {
+ /* XXX:DCCP
+         mdb_printf("       %5i %08x %08x %5i %08x %08x %5li %5i\n",
+             tcp->tcp_swnd, tcp->tcp_snxt, tcp->tcp_suna, tcp->tcp_rwnd,
+             tcp->tcp_rack, tcp->tcp_rnxt, tcp->tcp_rto, tcp->tcp_mss);
+ */
+ }
+ 
+ /*ARGSUSED*/
+ static int
+ netstat_dccp_cb(uintptr_t kaddr, const void *walk_data, void *cb_data)
+ {
+         netstat_cb_data_t *ncb = cb_data;
+         uint_t opts = ncb->opts;
+         int af = ncb->af;
+         uintptr_t dccp_kaddr;
+         conn_t *connp = &ncb->conn;
+         dccp_t dccps, *dccp;
+ 
+         if (mdb_vread(connp, sizeof (conn_t), kaddr) == -1) {
+                 mdb_warn("failed to read conn_t at %p", kaddr);
+                 return (WALK_ERR);
+         }
+ 
+         dccp_kaddr = (uintptr_t)connp->conn_dccp;
+         if (mdb_vread(&dccps, sizeof (dccp_t), dccp_kaddr) == -1) {
+                 mdb_warn("failed to read tcp_t at %p", dccp_kaddr);
+                 return (WALK_ERR);
+         }
+ 
+         dccp = &dccps;
+         connp->conn_dccp = dccp;
+         dccp->dccp_connp = connp;
+ 
+         if (!((opts & NETSTAT_ALL) || net_dccp_active(dccp)) ||
+             (af == AF_INET && !net_dccp_ipv4(dccp)) ||
+             (af == AF_INET6 && !net_dccp_ipv6(dccp))) {
+                 return (WALK_NEXT);
+         }
+ 
+         mdb_printf("%0?p %2i ", dccp_kaddr, dccp->dccp_state);
+         if (af == AF_INET) {
+                 net_ipv4addrport_pr(&connp->conn_laddr_v6, connp->conn_lport);
+                 mdb_printf(" ");
+                 net_ipv4addrport_pr(&connp->conn_faddr_v6, connp->conn_fport);
+         } else if (af == AF_INET6) {
+                 net_ipv6addrport_pr(&connp->conn_laddr_v6, connp->conn_lport);
+                 mdb_printf(" ");
+                 net_ipv6addrport_pr(&connp->conn_faddr_v6, connp->conn_fport);
+         }
+         mdb_printf(" %5i", ns_to_stackid((uintptr_t)connp->conn_netstack));
+         mdb_printf(" %4i\n", connp->conn_zoneid);
+         if (opts & NETSTAT_VERBOSE)
+                 netstat_dccp_verbose_pr(dccp);
+ 
+         return (WALK_NEXT);
+ }
+ 
  /*
   * print the address of a unix domain socket
   *
   * so is the address of a AF_UNIX struct sonode in mdb's address space
   * soa is the address of the struct soaddr to print
*** 1214,1223 ****
--- 1320,1336 ----
                  status = netstat_print_common("rawip_conn_cache", IPPROTO_ICMP,
                      netstat_icmp_cb, cbdata);
                  if (status != DCMD_OK)
                          goto out;
          }
+ 
+         if ((optP == NULL) || (strcmp("dccp", optP) == 0)) {
+                 status = netstat_print_common("dccp_conn_cache", IPPROTO_DCCP,
+                     netstat_dccp_cb, cbdata);
+                 if (status != DCMD_OK)
+                         goto out;
+         }
  out:
          mdb_free(cbdata, sizeof (netstat_cb_data_t));
          return (status);
  }