1 /* $NetBSD: ether.c,v 1.4 1995/02/20 11:04:06 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1992 Regents of the University of California. 5 * All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Lawrence Berkeley Laboratory and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL) 40 */ 41 42 #include <sys/param.h> 43 #include <sys/socket.h> 44 #include <string.h> 45 46 #include <net/if.h> 47 48 #include <netinet/in.h> 49 #include <netinet/if_ether.h> 50 #include <netinet/in_systm.h> 51 #include <netinet/ip.h> 52 53 #include "stand.h" 54 #include "net.h" 55 #include "netif.h" 56 57 /* Caller must leave room for ethernet header in front!! */ 58 size_t 59 sendether(d, pkt, len, dea, etype) 60 struct iodesc *d; 61 void *pkt; 62 size_t len; 63 u_char *dea; 64 int etype; 65 { 66 register struct ether_header *eh; 67 68 #ifdef ETHER_DEBUG 69 if (debug) 70 printf("sendether: called\n"); 71 #endif 72 73 eh = (struct ether_header *)pkt - 1; 74 len += sizeof(*eh); 75 76 MACPY(d->myea, eh->ether_shost); /* by byte */ 77 MACPY(dea, eh->ether_dhost); /* by byte */ 78 eh->ether_type = htons(etype); 79 80 len = netif_put(d, eh, len); 81 if (len == -1 || len < sizeof(*eh)) 82 return (-1); 83 84 len -= sizeof(*eh); 85 return (len); 86 } 87 88 size_t 89 readether(d, pkt, len, tleft) 90 register struct iodesc *d; 91 register void *pkt; 92 register size_t len; 93 time_t tleft; 94 { 95 register struct ether_header *eh; 96 97 #ifdef ETHER_DEBUG 98 if (debug) 99 printf("readether: called\n"); 100 #endif 101 102 eh = (struct ether_header *)pkt - 1; 103 len += sizeof(*eh); 104 105 len = netif_get(d, eh, len, tleft); 106 if (len == -1 || len < sizeof(*eh)) 107 return (-1); 108 109 len -= sizeof(*eh); 110 return (len); 111 } 112 113 /* 114 * Convert Ethernet address to printable (loggable) representation. 115 */ 116 static char digits[] = "0123456789abcdef"; 117 char * 118 ether_sprintf(ap) 119 register u_char *ap; 120 { 121 register i; 122 static char etherbuf[18]; 123 register char *cp = etherbuf; 124 125 for (i = 0; i < 6; i++) { 126 *cp++ = digits[*ap >> 4]; 127 *cp++ = digits[*ap++ & 0xf]; 128 *cp++ = ':'; 129 } 130 *--cp = 0; 131 return (etherbuf); 132 } 133