loopback.c

一个基于linux的TCP/IP协议栈的实现

/* loopback.c
 * [e-mail]
 * 2006-10-20
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if_arp.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include "net-support.h"
#include "pathnames.h"
//#include "intl.h"
#include "util.h"

/* Display an UNSPEC address. */
static char *pr_unspec(unsigned char *ptr)
{
    static char buff[64];
    char *pos;
    unsigned int i;

    pos = buff;
    for (i = 0; i < sizeof(struct sockaddr); i++) {
	pos += sprintf(pos, "%02X-", (*ptr++ & 0377));
    }
    buff[strlen(buff) - 1] = '\0';
    return (buff);
}

struct hwtype unspec_hwtype =
{
    "unspec", NULL, /*"UNSPEC", */ -1, 0,
    pr_unspec, NULL, NULL
};

struct hwtype loop_hwtype =
{
    "loop", NULL, /*"Local Loopback", */ ARPHRD_LOOPBACK, 0,
    NULL, NULL, NULL
};