/*-
 * Copyright (c) 2008-2009 Robert N. M. Watson
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <err.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

#include "tcpp.h"

#define BYTES_DEFAULT   10*1024*1024    /* Data per connection. */
#define MAXTCPS_DEFAULT 32              /* Number of TCPs at a time per proc. */
#define PROCS_DEFAULT   1               /* Processes used in run. */
#define TCPS_DEFAULT    1               /* Number of connections per process. */
#define BASEPORT_DEFAULT        10000

struct sockaddr_in remoteip;            /* Base target address. */
struct sockaddr_in localipbase;         /* Base local address, if -l. */
int cflag, hflag, lflag, mflag, pflag, sflag, tflag, Mflag, Pflag;
uint64_t bflag;
u_short rflag;

static void
usage(void)
{

        fprintf(stderr, "client: tcpp"
            " -c remoteIP"
            " [-h]"
            " [-P]"
            " [-M localIPcount]"
            " [-l localIPbase]"
            "\n\t"
            " [-b bytespertcp]"
            " [-m maxtcpsatonce]"
            " [-p procs]"
            " [-t tcpsperproc]"
            "\n"
            "\t"
            " [-r baseport]"
            "\n");

        fprintf(stderr, "server: tcpp"
            " -s"
            " [-P]"
            " [-l localIPbase]"
            " [-m maxtcpsatonce]"
            " [-p procs]"
            "\n"
            "\t"
            " [-r baseport]"
            "\n");
        exit(EX_USAGE);
}

int
main(int argc, char *argv[])
{
        long long ll;
        char *dummy;
        int ch;

        bzero(&localipbase, sizeof(localipbase));
        localipbase.sin_len = sizeof(localipbase);
        localipbase.sin_family = AF_INET;
        localipbase.sin_addr.s_addr = htonl(INADDR_ANY);        /* Default. */
        localipbase.sin_port = htons(0);                                /* Default. */

        bzero(&remoteip, sizeof(remoteip));
        remoteip.sin_len = sizeof(remoteip);
        remoteip.sin_family = AF_INET;
        remoteip.sin_addr.s_addr = htonl(INADDR_LOOPBACK); /* Default. */
        remoteip.sin_port = htons(0);                           /* Default. */

        bflag = BYTES_DEFAULT;
        mflag = MAXTCPS_DEFAULT;
        pflag = PROCS_DEFAULT;
        rflag = BASEPORT_DEFAULT;
        tflag = TCPS_DEFAULT;
        Mflag = 1;
        while ((ch = getopt(argc, argv, "b:c:hl:m:p:r:st:CM:PT")) != -1) {
                switch (ch) {
                case 'b':
                        ll = strtoll(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll <= 0)
                                usage();
                        bflag = ll;
                        break;

                case 'c':
                        cflag++;
                        if (inet_aton(optarg, &remoteip.sin_addr) != 1)
                                err(-1, "inet_aton: %s", optarg);
                        break;

                case 'h':
                        hflag++;
                        break;

                case 'l':
                        lflag++;
                        if (inet_aton(optarg, &localipbase.sin_addr) != 1)
                                err(-1, "inet_aton: %s", optarg);
                        break;

                case 'm':
                        ll = strtoll(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll <= 0)
                                usage();
                        mflag = ll;
                        break;

                case 'p':
                        ll = strtoll(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll <= 0)
                                usage();
                        pflag = ll;
                        break;

                case 'r':
                        ll = strtol(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll < 1 || ll > 65535)
                                usage();
                        rflag = ll;
                        break;

                case 's':
                        sflag++;
                        break;

                case 't':
                        ll = strtoll(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll <= 0)
                                usage();
                        tflag = ll;
                        break;

                case 'M':
                        ll = strtoll(optarg, &dummy, 10);
                        if (*dummy != '\0' || ll <= 1)
                                usage();
                        Mflag = ll;
                        break;

                case 'P':
#if defined(CPU_SETSIZE) && 0
                        Pflag++;
                        break;
#else
                        errx(EX_USAGE, "-P current unsupported");
#endif

                default:
                        usage();
                }
        }

        /* Exactly one of client and server. */
        if (cflag > 1 || sflag > 1)
                usage();
        if ((cflag && sflag) || (!cflag && !sflag))
                usage();

        /* If Mflag is specified, we must have the lflag for a local IP. */
        if (Mflag > 1 && !lflag)
                usage();

        /* Several flags are valid only on the client, disallow if server. */
        if (sflag && (hflag || Mflag > 1))
                usage();

        if (cflag)
                tcpp_client();
        else
                tcpp_server();
        exit(0);
}