freebsd-nq/usr.sbin/bhyve/net_utils.c
Vincenzo Maffione 4f7c3b7be5 bhyve: move common code to net_utils.c
Both virtio_net and e82545 network frontends have code to validate and
generate MAC addresses. These functionalities are replicated in the two
files, so we move them in a separate compilation unit.

Reviewed by:	rgrimes, bryanv, imp, kevans
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D20626
2019-06-13 17:39:32 +00:00

84 lines
2.7 KiB
C

/*-
* Copyright (c) 2011 NetApp, Inc.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include "net_utils.h"
#include "bhyverun.h"
#include <md5.h>
#include <net/ethernet.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
int
net_parsemac(char *mac_str, uint8_t *mac_addr)
{
struct ether_addr *ea;
char *tmpstr;
char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
tmpstr = strsep(&mac_str,"=");
if ((mac_str != NULL) && (!strcmp(tmpstr,"mac"))) {
ea = ether_aton(mac_str);
if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
fprintf(stderr, "Invalid MAC %s\n", mac_str);
return (EINVAL);
} else
memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
}
return (0);
}
void
net_genmac(struct pci_devinst *pi, uint8_t *macaddr)
{
/*
* The default MAC address is the standard NetApp OUI of 00-a0-98,
* followed by an MD5 of the PCI slot/func number and dev name
*/
MD5_CTX mdctx;
unsigned char digest[16];
char nstr[80];
snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
pi->pi_func, vmname);
MD5Init(&mdctx);
MD5Update(&mdctx, nstr, (unsigned int)strlen(nstr));
MD5Final(digest, &mdctx);
macaddr[0] = 0x00;
macaddr[1] = 0xa0;
macaddr[2] = 0x98;
macaddr[3] = digest[0];
macaddr[4] = digest[1];
macaddr[5] = digest[2];
}