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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Giacomo Guidi       <giacomo@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/*

 * Copyright (C) 2002 Paolo Gai

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#include <ll/sys/types.h>

#include <stdlib.h>

#include <string.h>

#include <tracer.h>

#include <unistd.h>

#include <kernel/kern.h>

#include <drivers/udpip.h>

//#define TRACER_UDP_DEBUG

#define UDP_MAXSIZE 1000

#define TRACER_PORT 20000

#define DELAY_LOOP 10000000

BYTE pkt[UDP_MAXSIZE];

int total_pkt_size = 0;

int TracerUDPInit = 0;

UDP_ADDR target,local;

char local_ip[20],target_ip[20];

int socket;

PID udp_task;

extern int TracerOutputType;

struct tracer_udp_header {

  char id[12];

  unsigned int pkt_number;

  unsigned int number_of_events;

  unsigned int total_size;

};

//Init UDP, if flag = 1 init the network driver

int tracer_init_udp(int flag, char *l_ip, char *t_ip) {

  struct net_model m = net_base;

  strcpy(local_ip,l_ip);

  strcpy(target_ip,t_ip);

  if (flag) {

    net_setudpip(m, local_ip, "255.255.255.255");

    if (net_init(&m) != 1) {

      return -1;

    }

  }

  ip_str2addr(local_ip,&(local.s_addr));

  local.s_port = TRACER_PORT;

  socket = udp_bind(&local, NULL);

  ip_str2addr(target_ip,&(target.s_addr));

  target.s_port = TRACER_PORT;

  sleep(1);

  TracerOutputType = TRACER_UDP_OUTPUT;

  TracerUDPInit = 1;

  return 0;

}

int send_udp_event(void *p, int size) {

  static BYTE *current = pkt;

  static int events_number = 0;

  static int packet_number = 0;

  struct tracer_udp_header head = {"TRACER-V1.0",0,0,0};

  struct tracer_udp_header *phead = (struct tracer_udp_header *)(pkt);

  int i;

  if (total_pkt_size + size < UDP_MAXSIZE) {

    if (total_pkt_size == 0) {

      memcpy(pkt,&head,sizeof(struct tracer_udp_header));

      current = pkt;

      current += sizeof(struct tracer_udp_header);

      total_pkt_size += sizeof(struct tracer_udp_header);

      phead->total_size = total_pkt_size;

      packet_number++;

      phead->pkt_number = packet_number;

    }

    events_number++;

    phead->number_of_events = events_number;

    total_pkt_size += size;

    phead->total_size = total_pkt_size;

    //Copy the event

    memcpy(current,p,size);

    current += size;

    return 0;

  } else {

    #ifdef TRACER_UDP_DEBUG

      cprintf("Packet Sent - Nr %d Size %d\n",packet_number,total_pkt_size);

    #endif

    if (TracerUDPInit == 1) {

      udp_sendto(socket, pkt, total_pkt_size, &target);

      for (i=0;i<DELAY_LOOP;i++);

    }

    events_number = 0;

    total_pkt_size = 0;

    current = pkt;

    send_udp_event(p,size);

    return 0;    

  }

  return -1;

}

void send_remaining_udp_buffer() {

  int i;

  if (TracerUDPInit == 1 && total_pkt_size != 0) {

    #ifdef TRACER_UDP_DEBUG

      cprintf("Last Packet Sent - Size %d\n",total_pkt_size);

    #endif

    udp_sendto(socket, pkt, total_pkt_size, &target);

    for (i=0;i<DELAY_LOOP;i++);

  }

}

//Sender Task

TASK udp_sender(void *arg)

{

  int number = (int)(arg);

  while(1) {

    #ifdef TRACER_UDP_DEBUG

      cprintf("Send Task...\n");

    #endif

    tracer_send_logged_events(number);  

  }

}

int tracer_create_udp_task(void *m, int EventsForPeriod)

{

  if (m == NULL) {

    NRT_TASK_MODEL st;

    nrt_task_default_model(st);

    nrt_task_def_arg(st,(void *)(EventsForPeriod));

    udp_task = task_create("UDP_Sender",udp_sender,&st,NULL);

    if (udp_task == NIL) {

      cprintf("Error creating UDP Sender\n");

      sys_end();

    }

    task_activate(udp_task);

  } else {

    udp_task = task_create("UDP_Sender",udp_sender,(TASK_MODEL *)&m,NULL);

    if (udp_task == NIL) {

      cprintf("Error creating UDP Sender\n");

      sys_end();

    }

    task_activate(udp_task);

  }

  return 0;

}