home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
HAM Radio 3.2
/
Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
/
packet
/
n17jsrc
/
enethdr.c
< prev
next >
Wrap
C/C++ Source or Header
|
1991-01-27
|
801b
|
42 lines
/* Ethernet header conversion routines
* Copyright 1991 Phil Karn, KA9Q
*/
#include "global.h"
#include "mbuf.h"
#include "enet.h"
/* Convert Ethernet header in host form to network mbuf */
struct mbuf *
htonether(ether,data)
struct ether *ether;
struct mbuf *data;
{
struct mbuf *bp;
register char *cp;
if((bp = pushdown(data,ETHERLEN)) == NULLBUF)
return NULLBUF;
cp = bp->data;
memcpy(cp,ether->dest,EADDR_LEN);
cp += EADDR_LEN;
memcpy(cp,ether->source,EADDR_LEN);
cp += EADDR_LEN;
put16(cp,ether->type);
return bp;
}
/* Extract Ethernet header */
int
ntohether(ether,bpp)
struct ether *ether;
struct mbuf **bpp;
{
pullup(bpp,ether->dest,EADDR_LEN);
pullup(bpp,ether->source,EADDR_LEN);
ether->type = pull16(bpp);
return ETHERLEN;
}