/*
 * Copyright (c) 2001,2002 Florian Schulze.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the authors nor the names of the contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * test.c - This file is part of lwIP test
 *
 */

/* C runtime includes */
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <string.h>
#include <conio.h>

/* lwIP core includes */
#include "lwip/opt.h"

#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/init.h"
#include "lwip/tcpip.h"

#include "lwip/tcp.h"
#include "lwip/udp.h"
#include "lwip/dns.h"
#include "lwip/dhcp.h"
#include "lwip/autoip.h"

/* lwIP netif includes */
#include "netif/loopif.h"
#include "netif/etharp.h"

/* applications includes */
#include "apps/httpserver_raw/httpd.h"
#include "apps/netio/netio.h"
#include "apps/netbios/netbios.h"
#include "apps/ping/ping.h"
#include "apps/rtp/rtp.h"
#include "apps/sntp/sntp.h"
#include "apps/chargen/chargen.h"

#if NO_SYS
/* ... then we need information about the timer intervals: */
#include "lwip/ip_frag.h"
#include "lwip/igmp.h"
#endif /* NO_SYS */

#if PPP_SUPPORT
/* PPP includes */
#include "../netif/ppp/ppp.h"
#include "lwip/sio.h"
#include "netif/ppp_oe.h"
#endif /* PPP_SUPPORT */

#include "pktif.h"

/* include the port-dependent configuration */
#include "lwipcfg_msvc.h"

/** Use an ethernet adapter? By default only if PPP is not used. */
#ifndef USE_ETHERNET
#define USE_ETHERNET  (!PPP_SUPPORT || PPPOE_SUPPORT)
#endif
/** Use an ethernet adapter for TCP/IP? By default only if PPP is not used. */
#ifndef USE_ETHERNET_TCPIP
#define USE_ETHERNET_TCPIP  !PPP_SUPPORT
#endif
#if PPP_SUPPORT && PPPOS_SUPPORT && PPPOE_SUPPORT
#error "This example does not support PPPoS and PPPoE at the same time"
#endif


#if NO_SYS
/* port-defined functions used for timer execution */
void msvc_sys_init();
u32_t sys_now();
#endif /* NO_SYS */

/* globales variables for netifs */
#if USE_ETHERNET
/* THE ethernet interface */
struct netif netif;
#endif /* USE_ETHERNET */
#if LWIP_HAVE_LOOPIF
/* THE loopback interface */
struct netif loop_netif;
#endif /* LWIP_HAVE_LOOPIF */
#if PPP_SUPPORT
/* THE PPP descriptor */
int ppp_desc = -1;
#endif /* PPP_SUPPORT */


#if NO_SYS
/* special functions used for NO_SYS=1 only */
typedef struct _timers_infos {
  int timer;
  int timer_interval;
  void (*timer_func)(void);
}timers_infos;

static timers_infos timers_table[] = {
#if LWIP_TCP
  { 0, TCP_FAST_INTERVAL,       tcp_fasttmr},
  { 0, TCP_SLOW_INTERVAL,       tcp_slowtmr},
#endif /* LWIP_TCP */
#if LWIP_ARP
  { 0, ARP_TMR_INTERVAL,        etharp_tmr},
#endif /* LWIP_ARP */
#if LWIP_DHCP
  { 0, DHCP_FINE_TIMER_MSECS,   dhcp_fine_tmr},
  { 0, DHCP_COARSE_TIMER_MSECS, dhcp_coarse_tmr},
#endif /* LWIP_DHCP */
#if IP_REASSEMBLY
  { 0, IP_TMR_INTERVAL,         ip_reass_tmr},
#endif /* IP_REASSEMBLY */
#if LWIP_AUTOIP
  { 0, AUTOIP_TMR_INTERVAL,     autoip_tmr},
#endif /* LWIP_AUTOIP */
#if LWIP_IGMP
  { 0, IGMP_TMR_INTERVAL,       igmp_tmr},
#endif /* LWIP_IGMP */
#if LWIP_DNS
  { 0, DNS_TMR_INTERVAL,        dns_tmr},
#endif /* LWIP_DNS */
};

/* initialize stack when NO_SYS=1 */
static void
nosys_init()
{
  msvc_sys_init();
  lwip_init();
}

/* get the current time and see if any timer has expired */
static void
timers_update()
{
  /* static variables for timer execution, initialized to zero! */
  static int last_time;

  int cur_time, time_diff, idxtimer;

  cur_time = sys_now();
  time_diff = cur_time - last_time;

  /* the '> 0' is an easy wrap-around check: the big gap at
   * the wraparound step is simply ignored... */
  if (time_diff > 0) {
    last_time = cur_time;
    for( idxtimer=0; idxtimer<(sizeof(timers_table)/sizeof(timers_infos)); idxtimer++) {
      timers_table[idxtimer].timer += time_diff;

      if (timers_table[idxtimer].timer > timers_table[idxtimer].timer_interval) {
        timers_table[idxtimer].timer_func();
        timers_table[idxtimer].timer -= timers_table[idxtimer].timer_interval;
      }
    }
  }
}
#endif /* NO_SYS */

#if PPP_SUPPORT
void
pppLinkStatusCallback(void *ctx, int errCode, void *arg)
{
  LWIP_UNUSED_ARG(ctx);

  switch(errCode) {
    case PPPERR_NONE: {             /* No error. */
      struct ppp_addrs *ppp_addrs = arg;

      printf("pppLinkStatusCallback: PPPERR_NONE\n");
      printf(" our_ipaddr=%s\n", ip_ntoa(&ppp_addrs->our_ipaddr));
      printf(" his_ipaddr=%s\n", ip_ntoa(&ppp_addrs->his_ipaddr));
      printf(" netmask   =%s\n", ip_ntoa(&ppp_addrs->netmask));
      printf(" dns1      =%s\n", ip_ntoa(&ppp_addrs->dns1));
      printf(" dns2      =%s\n", ip_ntoa(&ppp_addrs->dns2));
      break;
    }
    case PPPERR_PARAM: {           /* Invalid parameter. */
      printf("pppLinkStatusCallback: PPPERR_PARAM\n");
      break;
    }
    case PPPERR_OPEN: {            /* Unable to open PPP session. */
      printf("pppLinkStatusCallback: PPPERR_OPEN\n");
      break;
    }
    case PPPERR_DEVICE: {          /* Invalid I/O device for PPP. */
      printf("pppLinkStatusCallback: PPPERR_DEVICE\n");
      break;
    }
    case PPPERR_ALLOC: {           /* Unable to allocate resources. */
      printf("pppLinkStatusCallback: PPPERR_ALLOC\n");
      break;
    }
    case PPPERR_USER: {            /* User interrupt. */
      printf("pppLinkStatusCallback: PPPERR_USER\n");
      break;
    }
    case PPPERR_CONNECT: {         /* Connection lost. */
      printf("pppLinkStatusCallback: PPPERR_CONNECT\n");
      break;
    }
    case PPPERR_AUTHFAIL: {        /* Failed authentication challenge. */
      printf("pppLinkStatusCallback: PPPERR_AUTHFAIL\n");
      break;
    }
    case PPPERR_PROTOCOL: {        /* Failed to meet protocol. */
      printf("pppLinkStatusCallback: PPPERR_PROTOCOL\n");
      break;
    }
    default: {
      printf("pppLinkStatusCallback: unknown errCode %d\n", errCode);
      break;
    }
  }
}
#endif /* PPP_SUPPORT */

#if LWIP_NETIF_STATUS_CALLBACK
void status_callback(struct netif *netif)
{ if (netif_is_up(netif)) {
    printf("status_callback==UP, local interface IP is %s\n", ip_ntoa(&netif->ip_addr));
  } else {
    printf("status_callback==DOWN\n");
  }
}
#endif /* LWIP_NETIF_STATUS_CALLBACK */

#if LWIP_NETIF_LINK_CALLBACK
void link_callback(struct netif *netif)
{ if (netif_is_link_up(netif)) {
    printf("link_callback==UP\n");
#if LWIP_DHCP
    if (netif->dhcp != NULL) {
      dhcp_renew(netif);
    }
#endif /* LWIP_DHCP */
  } else {
    printf("link_callback==DOWN\n");
  }
}
#endif /* LWIP_NETIF_LINK_CALLBACK */

/* This function initializes all network interfaces */
static void
msvc_netif_init()
{
#if USE_ETHERNET
  struct ip_addr ipaddr, netmask, gw;
#endif /* USE_ETHERNET */
#if LWIP_HAVE_LOOPIF
  struct ip_addr loop_ipaddr, loop_netmask, loop_gw;
#endif /* LWIP_HAVE_LOOPIF */
#if PPP_SUPPORT && PPPOS_SUPPORT
  sio_fd_t ppp_sio;
#endif /* PPP_SUPPORT && PPPOS_SUPPORT */

#if PPP_SUPPORT
  const char *username = NULL, *password = NULL;
#ifdef PPP_USERNAME
  username = PPP_USERNAME;
#endif
#ifdef PPP_PASSWORD
  password = PPP_PASSWORD;
#endif
  printf("pppInit\n");
  pppInit();
  pppSetAuth(PPPAUTHTYPE_ANY, username, password);
  printf("pppOpen\n");
#if PPPOS_SUPPORT
  ppp_sio = sio_open(0);
  if (ppp_sio == NULL) {
    printf("sio_open error\n");
  } else {
    ppp_desc = pppOpen(ppp_sio, pppLinkStatusCallback, NULL);
  }
#endif /* PPPOS_SUPPORT */
#endif  /* PPP_SUPPORT */

#if LWIP_HAVE_LOOPIF
  IP4_ADDR(&loop_gw, 127,0,0,1);
  IP4_ADDR(&loop_ipaddr, 127,0,0,1);
  IP4_ADDR(&loop_netmask, 255,0,0,0);
  printf("Starting lwIP, loopback interface IP is %s\n", ip_ntoa(&loop_ipaddr));

#if NO_SYS
  netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, loopif_init, ip_input);
#else  /* NO_SYS */
  netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, loopif_init, tcpip_input);
#endif /* NO_SYS */
  netif_set_up(&loop_netif);
#endif /* LWIP_HAVE_LOOPIF */

#if USE_ETHERNET
  gw.addr = 0;
  ipaddr.addr = 0;
  netmask.addr = 0;
#if USE_ETHERNET_TCPIP
#if LWIP_DHCP
  printf("Starting lwIP, local interface IP is dhcp-enabled\n");
#elif LWIP_AUTOIP
  printf("Starting lwIP, local interface IP is autoip-enabled\n");
#else /* LWIP_AUTOIP */
  LWIP_PORT_INIT_GW(&gw);
  LWIP_PORT_INIT_IPADDR(&ipaddr);
  LWIP_PORT_INIT_NETMASK(&netmask);
  printf("Starting lwIP, local interface IP is %s\n", ip_ntoa(&ipaddr));
#endif /* LWIP_DHCP */
#endif /* USE_ETHERNET_TCPIP */

#if NO_SYS
#if LWIP_ARP
  netif_set_default(netif_add(&netif, &ipaddr, &netmask, &gw, NULL, ethernetif_init, ethernet_input));
#else /* LWIP_ARP */
  netif_set_default(netif_add(&netif, &ipaddr, &netmask, &gw, NULL, ethernetif_init, ip_input));
#endif /* LWIP_ARP */
#else  /* NO_SYS */
  netif_set_default(netif_add(&netif, &ipaddr, &netmask, &gw, NULL, ethernetif_init, tcpip_input));
#endif /* NO_SYS */
#if LWIP_NETIF_STATUS_CALLBACK
  netif_set_status_callback(&netif, status_callback);
#endif /* LWIP_NETIF_STATUS_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
  netif_set_link_callback(&netif, link_callback);
#endif /* LWIP_NETIF_LINK_CALLBACK */

#if USE_ETHERNET_TCPIP
#if LWIP_DHCP
  dhcp_start(&netif);
#elif LWIP_AUTOIP
  autoip_start(&netif);
#else /* LWIP_DHCP */
  netif_set_up(&netif);
#endif /* LWIP_DHCP */
#endif /* USE_ETHERNET_TCPIP */

#if PPP_SUPPORT && PPPOE_SUPPORT
  /* start PPPoE after ethernet netif is added! */
  ppp_desc = pppOverEthernetOpen(&netif, NULL, NULL, pppLinkStatusCallback, NULL);
#endif /* PPP_SUPPORT && PPPOE_SUPPORT */

#endif /* USE_ETHERNET */
}

void dns_found(const char *name, struct ip_addr *addr, void *arg)
{
  LWIP_UNUSED_ARG(arg);
  printf("%s: %s\n", name, addr ? ip_ntoa(addr) : "<not found>");
}

/* This function initializes applications */
static void
apps_init()
{
#if LWIP_DNS_APP && LWIP_DNS
  char*          dnsname="3com.com";
  struct ip_addr dnsresp;
  if (dns_gethostbyname(dnsname, &dnsresp, dns_found, 0) == ERR_OK) {
    dns_found(dnsname, &dnsresp, 0);
  }
#endif /* LWIP_DNS_APP && LWIP_DNS */

#if LWIP_CHARGEN_APP && LWIP_SOCKET
  chargen_init();
#endif /* LWIP_CHARGEN_APP && LWIP_SOCKET */

#if LWIP_PING_APP && LWIP_RAW && LWIP_ICMP
  ping_init();
#endif /* LWIP_PING_APP && LWIP_RAW && LWIP_ICMP */

#if LWIP_NETBIOS_APP && LWIP_UDP
  netbios_init();
#endif /* LWIP_NETBIOS_APP && LWIP_UDP */

#if LWIP_HTTPD_APP && LWIP_TCP
  httpd_init();
#endif /* LWIP_HTTPD_APP && LWIP_TCP */

#if LWIP_NETIO_APP && LWIP_TCP
  netio_init();
#endif /* LWIP_NETIO_APP && LWIP_TCP */

#if LWIP_RTP_APP && LWIP_SOCKET
  rtp_init();
#endif /* LWIP_RTP_APP && LWIP_SOCKET */

#if LWIP_SNTP_APP && LWIP_SOCKET
  sntp_init();
#endif /* LWIP_SNTP_APP && LWIP_SOCKET */
}

/* This function initializes this lwIP test. When NO_SYS=1, this is done in
 * the main_loop context (there is no other one), when NO_SYS=0, this is done
 * in the tcpip_thread context */
static void
test_init(void * arg)
{ /* remove compiler warning */
#if NO_SYS
  LWIP_UNUSED_ARG(arg);
#else /* NO_SYS */
  sys_sem_t init_sem;
  LWIP_ASSERT("arg != NULL", arg != NULL);
  init_sem = (sys_sem_t)arg;
#endif /* NO_SYS */

  /* init network interfaces */
  msvc_netif_init();
  
  /* init apps */
  apps_init();

#if !NO_SYS
  sys_sem_signal(init_sem);
#endif /* !NO_SYS */
}

/* This is somewhat different to other ports: we have a main loop here:
 * a dedicated task that waits for packets to arrive. This would normally be
 * done from interrupt context with embedded hardware, but we don't get an
 * interrupt in windows for that :-) */
void main_loop()
{
#if !NO_SYS
  sys_sem_t init_sem;
#endif /* NO_SYS */
#if PPP_SUPPORT
  volatile int callClosePpp = 0;
#endif /* PPP_SUPPORT */

  /* initialize lwIP stack, network interfaces and applications */
#if NO_SYS
  nosys_init();
  test_init(NULL);
#else /* NO_SYS */
  init_sem = sys_sem_new(0);
  tcpip_init(test_init, init_sem);
  /* we have to wait for initialization to finish before
   * calling update_adapter()! */
  sys_sem_wait(init_sem);
  sys_sem_free(init_sem);
#endif /* NO_SYS */

  /* MAIN LOOP for driver update (and timers if NO_SYS) */
  while (!_kbhit()) {
#if NO_SYS
    /* handle timers (already done in tcpip.c when NO_SYS=0) */
    timers_update();
#endif /* NO_SYS */

#if USE_ETHERNET
    /* check for packets and link status*/
    ethernetif_poll(&netif);
#else /* USE_ETHERNET */
    sys_msleep(10);
#endif /* USE_ETHERNET */
#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
    /* check for loopback packets on all netifs */
    netif_poll_all();
#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
#if PPP_SUPPORT
    if(callClosePpp && (ppp_desc >= 0)) {
      /* make sure to disconnect PPP before stopping the program... */
      callClosePpp = 0;
      pppClose(ppp_desc);
      ppp_desc = -1;
    }
#endif /* PPP_SUPPORT */
  }

#if PPP_SUPPORT
    if(ppp_desc >= 0) {
      u32_t started;
      printf("Closing PPP connection...\n");
      /* make sure to disconnect PPP before stopping the program... */
      pppClose(ppp_desc);
      ppp_desc = -1;
      /* Wait for some time to let PPP finish... */
      started = sys_now();
      do
      {
#if USE_ETHERNET
        ethernetif_poll(&netif);
#else /* USE_ETHERNET */
        sys_msleep(50);
#endif /* USE_ETHERNET */
      } while(sys_now() - started < 5000);
    }
#endif /* PPP_SUPPORT */
#if USE_ETHERNET
  /* release the pcap library... */
  ethernetif_shutdown(&netif);
#endif /* USE_ETHERNET */
}

int main(void)
{
  /* no stdio-buffering, please! */
  setvbuf(stdout, NULL,_IONBF, 0);

  main_loop();

  return 0;
}