datapath/nx_msg.c

   1 /*
   2  * Distributed under the terms of the GNU GPL version 2.
   3  * Copyright (c) 2008 Nicira Networks
   4  */
   5
   6 #include "chain.h"
   7 #include "datapath.h"
   8 #include "openflow/nicira-ext.h"
   9 #include "nx_act_snat.h"
  10 #include "nx_msg.h"
  11
  12
  13 int
  14 nx_recv_msg(struct sw_chain *chain, const struct sender *sender,
  15                 const void *msg)
  16 {
  17         const struct nicira_header *nh = msg;
  18
  19         switch (ntohl(nh->subtype)) {
  20 #ifdef SUPPORT_SNAT
  21         case NXT_ACT_SET_CONFIG: {
  22                 const struct nx_act_config *nac = msg;
  23                 if (ntohs(nh->header.length) < sizeof(*nac))
  24                         return -EINVAL;
  25
  26                 if (nac->type == htons(NXAST_SNAT))
  27                         return snat_mod_config(chain->dp, nac);
  28                 else
  29                         return -EINVAL;
  30                 break;
  31         }
  32 #endif
  33
  34         default:
  35                 dp_send_error_msg(chain->dp, sender, OFPET_BAD_REQUEST,
  36                                   OFPBRC_BAD_SUBTYPE, msg, ntohs(nh->header.length));
  37                 return -EINVAL;
  38         }
  39
  40         return -EINVAL;
  41 }