send.c

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/*
 * send.c
 *
 * Copyright (c) 2002 Dug Song <dugsong@monkey.org>
 *
 * $Id: send.c,v 1.3 2002/02/08 07:43:53 dugsong Exp $
 */

#include "config.h"

#include <sys/types.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include "dnet.h"
#include "aton.h"
#include "mod.h"

void
send_usage(void)
{
        fprintf(stderr, "Usage: dnet send [<device>]\n");
        exit(1);
}

int
send_main(int argc, char *argv[])
{
        eth_t *eth;
        ip_t *ip;
        u_char *p, buf[IP_LEN_MAX];     /* XXX */
        int c, len;

        if (argc == 2 && *(argv[1]) == '-')
                send_usage();
        
        if (isatty(STDIN_FILENO))
                errx(1, "can't read packet to send from tty");

        p = buf;
        len = sizeof(buf) - (p - buf);
        
        while ((c = read(STDIN_FILENO, p, len)) > 0) {
                p += c;
                len -= c;
        }
        len = p - buf;
        
        if (argc == 1) {
                if ((ip = ip_open()) == NULL)
                        err(1, "ip_open");
                if (ip_send(ip, buf, len) != len)
                        err(1, "ip_send");
                ip_close(ip);
        } else if (argc == 2) {
                if ((eth = eth_open(argv[1])) == NULL)
                        err(1, "eth_open");
                if (eth_send(eth, buf, len) != len)
                        err(1, "eth_send");
                eth_close(eth);
        } else
                send_usage();
        
        exit(0);
}

struct mod mod_send = {
        "send",
        MOD_TYPE_XMIT,
        send_main
};

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