/*

 * This file is part of the SSH Library

 *

 * Copyright (c) 2010 by Aris Adamantiadis

 *

 * The SSH Library is free software; you can redistribute it and/or modify

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

 * the Free Software Foundation; either version 2.1 of the License, or (at your

 * option) any later version.

 *

 * The SSH Library 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 Lesser General Public

 * License for more details.

 *

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

 * along with the SSH Library; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,

 * MA 02111-1307, USA.

 */

#include "config.h"

#include "benchmarks.h"

#include <libssh/libssh.h>

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

struct benchmark benchmarks[]= {

    {

        .name="benchmark_raw_upload",

        .fct=benchmarks_raw_up,

        .enabled=0

    },

    {

        .name="benchmark_raw_download",

        .fct=benchmarks_raw_down,

        .enabled=0

    },

    {

        .name="benchmark_scp_upload",

        .fct=benchmarks_scp_up,

        .enabled=0

    },

    {

        .name="benchmark_scp_download",

        .fct=benchmarks_scp_down,

        .enabled=0

    },

    {

        .name="benchmark_sync_sftp_upload",

        .fct=benchmarks_sync_sftp_up,

        .enabled=0

    },

    {

        .name="benchmark_sync_sftp_download",

        .fct=benchmarks_sync_sftp_down,

        .enabled=0

    },

    {

        .name="benchmark_async_sftp_download",

        .fct=benchmarks_async_sftp_down,

        .enabled=0

    }

};

#ifdef HAVE_ARGP_H

#include <argp.h>

const char *argp_program_version = "libssh benchmarks 2011-08-28";

const char *argp_program_bug_address = "Aris Adamantiadis <aris@0xbadc0de.be>";

static char **cmdline;

/* Program documentation. */

static char doc[] = "libssh benchmarks";

/* The options we understand. */

static struct argp_option options[] = {

  {

    .name  = "verbose",

    .key   = 'v',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Make libssh benchmark more verbose",

    .group = 0

  },

  {

    .name  = "raw-upload",

    .key   = '1',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Upload raw data using channel",

    .group = 0

  },

  {

    .name  = "raw-download",

    .key   = '2',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Download raw data using channel",

    .group = 0

  },

  {

    .name  = "scp-upload",

    .key   = '3',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Upload data using SCP",

    .group = 0

  },

  {

    .name  = "scp-download",

    .key   = '4',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Download data using SCP",

    .group = 0

  },

  {

    .name  = "sync-sftp-upload",

    .key   = '5',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Upload data using synchronous SFTP",

    .group = 0

  },

  {

    .name  = "sync-sftp-download",

    .key   = '6',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Download data using synchronous SFTP (slow)",

    .group = 0

  },

  {

    .name  = "async-sftp-download",

    .key   = '7',

    .arg   = NULL,

    .flags = 0,

    .doc   = "Download data using asynchronous SFTP (fast)",

    .group = 0

  },

  {

    .name  = "host",

    .key   = 'h',

    .arg   = "HOST",

    .flags = 0,

    .doc   = "Add a host to connect for benchmark (format user@hostname)",

    .group = 0

  },

  {

    .name  = "size",

    .key   = 's',

    .arg   = "MBYTES",

    .flags = 0,

    .doc   = "MBytes of data to send/receive per test",

    .group = 0

  },

  {

    .name  = "chunk",

    .key   = 'c',

    .arg   = "bytes",

    .flags = 0,

    .doc   = "size of data chunks to send/receive",

    .group = 0

  },

  {

    .name  = "prequests",

    .key   = 'p',

    .arg   = "number [20]",

    .flags = 0,

    .doc   = "[async SFTP] number of concurrent requests",

    .group = 0

  },

  {

    .name  = "cipher",

    .key   = 'C',

    .arg   = "cipher",

    .flags = 0,

    .doc   = "Cryptographic cipher to be used",

    .group = 0

  },

  {NULL, 0, NULL, 0, NULL, 0}

};

/* Parse a single option. */

static error_t parse_opt (int key, char *arg, struct argp_state *state) {

  /* Get the input argument from argp_parse, which we

   * know is a pointer to our arguments structure.

   */

  struct argument_s *arguments = state->input;

  /* arg is currently not used */

  (void) arg;

  switch (key) {

    case '1':

    case '2':

    case '3':

    case '4':

    case '5':

    case '6':

    case '7':

      benchmarks[key - '1'].enabled = 1;

      arguments->ntests ++;

      break;

    case 'v':

      arguments->verbose++;

      break;

    case 's':

      arguments->datasize = atoi(arg);

      break;

    case 'p':

      arguments->concurrent_requests = atoi(arg);

      break;

    case 'c':

      arguments->chunksize = atoi(arg);

      break;

    case 'C':

      arguments->cipher = arg;

      break;

    case 'h':

      if(arguments->nhosts >= MAX_HOSTS_CONNECT){

        fprintf(stderr, "Too much hosts\n");

        return ARGP_ERR_UNKNOWN;

      }

      arguments->hosts[arguments->nhosts]=arg;

      arguments->nhosts++;

      break;

    case ARGP_KEY_ARG:

      /* End processing here. */

      cmdline = &state->argv [state->next - 1];

      state->next = state->argc;

      break;

    default:

      return ARGP_ERR_UNKNOWN;

  }

  return 0;

}

/* Our argp parser. */

static struct argp argp = {options, parse_opt, NULL, doc, NULL, NULL, NULL};

#endif /* HAVE_ARGP_H */

static void cmdline_parse(int argc, char **argv, struct argument_s *arguments) {

  /*

   * Parse our arguments; every option seen by parse_opt will

   * be reflected in arguments.

   */

#ifdef HAVE_ARGP_H

  argp_parse(&argp, argc, argv, 0, 0, arguments);

#else /* HAVE_ARGP_H */

  (void) argc;

  (void) argv;

  arguments->hosts[0]="localhost";

  arguments->nhosts=1;

#endif /* HAVE_ARGP_H */

}

static void arguments_init(struct argument_s *arguments){

  memset(arguments,0,sizeof(*arguments));

  arguments->chunksize=32758;

  arguments->concurrent_requests=20;

  arguments->datasize = 10;

}

static ssh_session connect_host(const char *host, int verbose, char *cipher){

  ssh_session session=ssh_new();

  if(session==NULL)

    goto error;

  if(ssh_options_set(session,SSH_OPTIONS_HOST, host)<0)

    goto error;

  ssh_options_set(session, SSH_OPTIONS_LOG_VERBOSITY, &verbose);

  if(cipher != NULL){

    if (ssh_options_set(session, SSH_OPTIONS_CIPHERS_C_S, cipher) ||

        ssh_options_set(session, SSH_OPTIONS_CIPHERS_S_C, cipher)){

      goto error;

    }

  }

  ssh_options_parse_config(session, NULL);

  if(ssh_connect(session)==SSH_ERROR)

    goto error;

  if(ssh_userauth_autopubkey(session,NULL) != SSH_AUTH_SUCCESS)

    goto error;

  return session;

error:

  fprintf(stderr,"Error connecting to \"%s\": %s\n",host,ssh_get_error(session));

  ssh_free(session);

  return NULL;

}

static char *network_speed(float bps){

  static char buf[128];

  if(bps > 1000*1000*1000){

    /* Gbps */

    snprintf(buf,sizeof(buf),"%f Gbps",bps/(1000*1000*1000));

  } else if(bps > 1000*1000){

    /* Mbps */

    snprintf(buf,sizeof(buf),"%f Mbps",bps/(1000*1000));

  } else if(bps > 1000){

    snprintf(buf,sizeof(buf),"%f Kbps",bps/1000);

  } else {

    snprintf(buf,sizeof(buf),"%f bps",bps);

  }

  return buf;

}

static void do_benchmarks(ssh_session session, struct argument_s *arguments,

    const char *hostname){

  float ping_rtt=0.0;

  float ssh_rtt=0.0;

  float bps=0.0;

  int i;

  int err;

  struct benchmark *b;

  if(arguments->verbose>0)

    fprintf(stdout,"Testing ICMP RTT\n");

  err=benchmarks_ping_latency(hostname, &ping_rtt);

  if(err == 0){

    fprintf(stdout,"ping RTT : %f ms\n",ping_rtt);

  }

  err=benchmarks_ssh_latency(session, &ssh_rtt);

  if(err==0){

    fprintf(stdout, "SSH RTT : %f ms. Theoretical max BW (win=128K) : %s\n",ssh_rtt,network_speed(128000.0/(ssh_rtt / 1000.0)));

  }

  for (i=0 ; i

    b = &benchmarks[i];

    if(b->enabled){

      err=b->fct(session,arguments,&bps;;

      if(err==0){

        fprintf(stdout, "%s : %s : %s\n",hostname, b->name, network_speed(bps));

      }

    }

  }

}

char *buffer;

int main(int argc, char **argv){

  struct argument_s arguments;

  ssh_session session;

  int i;

  arguments_init(&arguments);

  cmdline_parse(argc, argv, &arguments);

  if (arguments.nhosts==0){

    fprintf(stderr,"At least one host (-h) must be specified\n");

    return EXIT_FAILURE;

  }

  if (arguments.ntests==0){

    for(i=0; i < BENCHMARK_NUMBER ; ++i){

      benchmarks[i].enabled=1;

    }

    arguments.ntests=BENCHMARK_NUMBER;

  }

  buffer=malloc(arguments.chunksize > 1024 ? arguments.chunksize : 1024);

  if(buffer == NULL){

    fprintf(stderr,"Allocation of chunk buffer failed\n");

    return EXIT_FAILURE;

  }

  if (arguments.verbose > 0){

    fprintf(stdout, "Will try hosts ");

    for(i=0;i

      fprintf(stdout,"\"%s\" ", arguments.hosts[i]);

    }

    fprintf(stdout,"with benchmarks ");

    for(i=0;i

      if(benchmarks[i].enabled)

        fprintf(stdout,"\"%s\" ",benchmarks[i].name);

    }

    fprintf(stdout,"\n");

  }

  for(i=0; i

    if(arguments.verbose > 0)

      fprintf(stdout,"Connecting to \"%s\"...\n",arguments.hosts[i]);

    session=connect_host(arguments.hosts[i], arguments.verbose, arguments.cipher);

    if(session != NULL && arguments.verbose > 0)

      fprintf(stdout,"Success\n");

    if(session == NULL){

      fprintf(stderr,"Errors occurred, stopping\n");

      return EXIT_FAILURE;

    }

    do_benchmarks(session, &arguments, arguments.hosts[i]);

    ssh_disconnect(session);

    ssh_free(session);

  }

  return EXIT_SUCCESS;

}