/*

 * Copyright (C) 2017 OpenSIPS Solutions

 *

 * This file is part of opensips, a free SIP server.

 *

 * opensips 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.

 *

 * opensips 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

#include "../trace_api.h"

#include "trans_trace.h"

str trans_trace_str_status[] = {

  str_init("SUCCESS"),

  str_init("FAILURE")

};

str trans_trace_str_event[] = {

  str_init("ACCEPTED"),

  str_init("CONNECT_START"),

  str_init("CONNECTED"),

  str_init("CLOSED"),

  str_init("STATS")

};

static str TCP_PROTO_ID = str_init("TCP");

static str TLS_PROTO_ID = str_init("TLS");

static str WS_PROTO_ID = str_init("WS");

static str WSS_PROTO_ID = str_init("WSS");

static str BINS_PROTO_ID = str_init("BINS");

/* error reasons */

str AS_CONNECT_INIT = str_init("Async connect in progress...");

str CONNECT_OK = str_init("Successfully connected...");

str ASYNC_CONNECT_OK = str_init("Successfully connected asynchronously...");

str ACCEPT_OK = str_init("Connection accepted...");

str ACCEPT_FAIL = str_init("Failed to accept connection...");

str CONNECT_FAIL = str_init("Failed to connect...");

static void add_proto( trace_message message, int proto);

int net_trace_proto_id=-1;

trace_proto_t* net_trace_api=0;

trace_message create_trace_message( unsigned long long id, union sockaddr_union* src,

            union sockaddr_union* dst, int proto, void* dest)

{

  int net_proto;

  static int correlation_id = -1, correlation_vendor = -1;

  str str_id;

  if ( !net_trace_api ) {

    LM_BUG("trace api not loaded! should have been loaded!\n");

    return 0;

  }

  trace_message message;

  switch ( proto ) {

    case PROTO_TCP:

      net_proto = IPPROTO_TCP;

      break;

    case PROTO_TLS:

      net_proto = IPPROTO_IDP;

      break;

    case PROTO_WS:

      net_proto = IPPROTO_ESP;

      break;

    case PROTO_WSS:

      net_proto = IPPROTO_ESP;

      break;

    case PROTO_BINS:

      net_proto = IPPROTO_IDP;

      break;

    default:

      return 0;

  }

  message = net_trace_api->create_trace_message( src, dst,

      net_proto, 0, net_trace_proto_id, dest);

  str_id.s = int2str( id, &str_id.len );

  if ( correlation_vendor == -1 || correlation_id == - 1) {

    if ( net_trace_api->get_data_id("correlation_id", &correlation_vendor, &correlation_id ) < 0 ) {

      LM_ERR("can't find correlation id chunk!\n");

      return 0;

    }

  }

  if ( net_trace_api->add_chunk( message, str_id.s, str_id.len, TRACE_TYPE_STR,

      correlation_id, correlation_vendor) < 0) {

    LM_ERR("failed to add correlation id! aborting trace...!\n");

    return 0;

  }

  add_proto( message, proto);

  return message;

}

void add_trace_data( void* message, char* key, str* value)

{

  if ( !message || !key || !value || !value->len || !value->s ) {

    LM_ERR("invalid input data!\n");

    return;

  }

  net_trace_api->add_payload_part( message, key, value);

  return;

}

int send_trace_message( void* message, void* destination)

{

  if ( net_trace_api->send_message( message, destination, 0) < 0 ) {

    LM_ERR("failed to trace message!\n");

    net_trace_api->free_message( message );

    return -1;

  }

  net_trace_api->free_message( message );

  return 0;

}

static void add_proto( trace_message message, int proto)

{

  switch ( proto ) {

    case PROTO_TCP:

      add_trace_data( message, "Protocol", &TCP_PROTO_ID );

      break;

    case PROTO_TLS:

      add_trace_data( message, "Protocol", &TLS_PROTO_ID );

      break;

    case PROTO_WS:

      add_trace_data( message, "Protocol", &WS_PROTO_ID );

      break;

    case PROTO_WSS:

      add_trace_data( message, "Protocol", &WSS_PROTO_ID );

      break;

    case PROTO_BINS:

      add_trace_data( message, "Protocol", &BINS_PROTO_ID );

      break;

    default:

      break;

  }

}

int trace_message_atonce( int proto, unsigned long long id, union sockaddr_union* src,

            union sockaddr_union* dst,trans_trace_event event,

            trans_trace_status status, str* data, void* destination)

{

  trace_message message;

  message = create_trace_message( id, src, dst, proto, destination);

  if ( !message ) {

    LM_ERR("failed to create the message!\n");

    return -1;

  }

  add_trace_data( message, "Event", &trans_trace_str_event[event]);

  add_trace_data( message, "Status", &trans_trace_str_status[status]);

  if ( data && data->s && data->len) {

    add_trace_data( message, "Message", data);

  }

  if ( send_trace_message( message, destination) < 0 ) {

    LM_ERR("failed to send message!\n");

    return -1;

  }

  return 0;

}

int tcpconn2su( struct tcp_connection* c, union sockaddr_union* src_su,

    union sockaddr_union* dst_su)

{

  if ( !c || !src_su || !dst_su ) {

    LM_ERR("bad input!\n");

    return -1;

  }

  if ( init_su( src_su, &c->rcv.src_ip, c->rcv.src_port) < 0 ) {

    LM_ERR("failed to create source su!\n");

    return -1;

  }

  if ( init_su( dst_su, &c->rcv.dst_ip, c->rcv.dst_port) < 0 ) {

    LM_ERR("failed to create destination su!\n");

    return -1;

  }

  return 0;

}

int check_trace_route( struct script_route_ref* rt_ref,

                        struct tcp_connection* conn)

{

  struct sip_msg *req;

  /* route not set */

  if ( !ref_script_route_is_valid(rt_ref) )

    return 1;

  req = get_dummy_sip_msg();

  if(req == NULL) {

    LM_ERR("No more memory\n");

    return -1;

  }

  /* set request route type */

  set_route_type( REQUEST_ROUTE );

  memcpy( &req->rcv, &conn->rcv, sizeof( struct receive_info ));

  /* run given hep route */

  if (run_top_route(sroutes->request[rt_ref->idx], req) & ACT_FL_DROP){

    conn->flags |= F_CONN_TRACE_DROPPED;

    release_dummy_sip_msg(req);

    return 0;

  }

  release_dummy_sip_msg(req);

  return 1;

}