ether.cc
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:4k
- /*-
- * Copyright (c) 1993-1994, 1998 The Regents of the University of California.
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and the Network Research Group at
- * Lawrence Berkeley Laboratory.
- * 4. Neither the name of the University nor of the Laboratory may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- */
- #if 0
- #ifndef lint
- static const char rcsid[] =
- "@(#) $Header: /cvsroot/nsnam/ns-2/emulate/ether.cc,v 1.4 2000/02/08 23:35:12 salehi Exp $ (LBL)";
- #endif
- #endif
- #include <stdio.h>
- #include <string.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/ioctl.h>
- #include <net/ethernet.h>
- #include "config.h"
- #include "ether.h"
- char Ethernet::hex[] = "0123456789abcdef";
- void
- Ethernet::ether_print(const u_char *bp)
- {
- const struct ether_header *ep;
-
- ep = (const struct ether_header *)bp;
- printf("src: %sn",
- etheraddr_string(ep->ether_shost));
- printf("dst: %sn",
- etheraddr_string(ep->ether_dhost));
- printf("prot: %hxn",
- ntohs(ep->ether_type));
- }
- char *
- Ethernet::etheraddr_string(const u_char *ep)
- {
- unsigned i, j;
- register char *cp;
- static char buf[sizeof("00:00:00:00:00:00")];
-
- cp = buf;
- if ((j = *ep >> 4) != 0)
- *cp++ = hex[j];
- *cp++ = hex[*ep++ & 0xf];
- for (i = 5; (int)--i >= 0;) {
- *cp++ = ':';
- if ((j = *ep >> 4) != 0)
- *cp++ = hex[j];
- *cp++ = hex[*ep++ & 0xf];
- }
- *cp = ' ';
- return(buf);
- }
- #include <net/if.h>
- u_char *
- Ethernet::nametoaddr(const char *devname)
- {
- static struct ifreq ifr;
- int s;
- memset(&ifr, 0, sizeof(ifr));
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- fprintf(stderr, "Ethernet::nametoaddr-- failed socketn");
- return NULL;
- }
- strncpy(ifr.ifr_name, devname, sizeof(ifr.ifr_name));
- if (ioctl(s, SIOCGIFADDR, (char *)&ifr) < 0) {
- fprintf(stderr, "Ethernet::nametoaddr-- failed SIOCGIFADDRn");
- return NULL;
- }
- return ((u_char*) &ifr.ifr_data);
- }