forwarding.c

Go to the documentation of this file.

#include "main-header.h"
#include "routing.h"
#include "espressif/esp8266_flash.h"
//#include "user_app_exe.h"
#include "route_command.h"
 
static byte debug = 0;
 
void set_forward_debug(byte b) {
  debug = b;
}
int forward_packet(struct command *com) {
  struct hostroute *host;
 
  if (!config_get_flag(CONFIG_FLAGS_ROUTING_ENABLED)) {
    printf("[forwarding] Forwarding of packets disabled\r\n");
    return 151;
  }
  com->flags = com->flags | COMFLAGS_FORWARDED;
  if (debug) {
    printf("[forwarding] Forwarding packet...\r\n");
    command_print(com);
  }
 
  if (!is_command_valid(com)) {
    error_com(com);
    return 100;
  }
  // special case - if we are connected to server
  // and we are to forward a packet to the server, then
  // unconditionally push it to the server
  if ((com->target == CLOUD_SERVER) && (get_hops_to_server() == 1)) {
    if (debug) {
      printf("[forwarding] unconditionally push to server\r\n");
    }
    com->recipient = CLOUD_SERVER;
    com->sourcedev = SOURCE_WIFI;
    int e = send_command(com);
    // I think this might break because we changed the recipient
    //send_command_reply(com, COMFLAGS_FORWARDED | COMFLAGS_SUCCESS);
    return e;
  }
 
 
  // check configured routes
  struct route *r = get_configured_route(com);
 
  if (r == NULL) {
    if (debug) {
      printf("[forwarding] no route configured for target %N\r\n", com->target);
    }
 
    // (got no configured routes, so check leaerned routes (direct attached))
    host = routing_find_host(com->target);
    if (host == NULL) {
      // no learned route either
      send_command_fw_info(com, 1);// indicate failure forwarding
      return 102;
    }
    // learned host route in 'host'
    com->recipient = host->nexthop;
    com->sourcedev = host->device;
    int e = send_command(com);
    return e;
  }
 
  host = routing_find_host(r->sendto);
  if (host == NULL) {
    printf("[forwarding] No hostroute known for target (%N)\r\n", r->sendto);
    send_command_fw_info(com, 1); // indicate failure forwarding
    return 101;
  }
 
  if (debug) {
    printf("[forwarding] forwarding packet from %N to %N via %N on device %i\r\n", com->sender, com->target, r->sendto, r->out_device);
  }
  com->recipient = r->sendto;
  com->sourcedev = r->out_device;
  int e = send_command(com);
 
  return e;
}