267 lines
7.1 KiB
C
267 lines
7.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ifaddrs.h>
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#include <unistd.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/ethernet.h>
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#include "ifconfig.h"
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#include "ifconfig_netlink.h"
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static struct ifreq link_ridreq;
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extern char *f_ether;
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static void
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print_ether(const struct ether_addr *addr, const char *prefix)
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{
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char *ether_format = ether_ntoa(addr);
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if (f_ether != NULL && strcmp(f_ether, "dash") == 0) {
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char *format_char;
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while ((format_char = strchr(ether_format, ':')) != NULL) {
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*format_char = '-';
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}
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}
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printf("\t%s %s\n", prefix, ether_format);
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}
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static void
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print_lladdr(struct sockaddr_dl *sdl)
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{
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if (match_ether(sdl)) {
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print_ether((struct ether_addr *)LLADDR(sdl), "ether");
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} else {
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int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
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printf("\tlladdr %s\n", link_ntoa(sdl) + n);
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}
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}
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static void
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print_pcp(int s)
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{
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if (ioctl(s, SIOCGLANPCP, (caddr_t)&ifr) == 0 &&
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ifr.ifr_lan_pcp != IFNET_PCP_NONE)
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printf("\tpcp %d\n", ifr.ifr_lan_pcp);
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}
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#ifdef WITHOUT_NETLINK
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static void
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link_status(if_ctx *ctx, const struct ifaddrs *ifa)
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{
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/* XXX no const 'cuz LLADDR is defined wrong */
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struct sockaddr_dl *sdl;
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struct ifreq ifr;
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int rc, sock_hw;
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static const u_char laggaddr[6] = {0};
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sdl = (struct sockaddr_dl *) ifa->ifa_addr;
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if (sdl == NULL || sdl->sdl_alen == 0)
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return;
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print_lladdr(sdl);
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/*
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* Best-effort (i.e. failures are silent) to get original
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* hardware address, as read by NIC driver at attach time. Only
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* applies to Ethernet NICs (IFT_ETHER). However, laggX
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* interfaces claim to be IFT_ETHER, and re-type their component
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* Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If
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* the MAC is zeroed, then it's actually a lagg.
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*/
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if ((sdl->sdl_type != IFT_ETHER &&
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sdl->sdl_type != IFT_IEEE8023ADLAG) ||
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sdl->sdl_alen != ETHER_ADDR_LEN)
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return;
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strncpy(ifr.ifr_name, ifa->ifa_name, sizeof(ifr.ifr_name));
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memcpy(&ifr.ifr_addr, ifa->ifa_addr, sizeof(ifa->ifa_addr->sa_len));
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ifr.ifr_addr.sa_family = AF_LOCAL;
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if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) {
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warn("socket(AF_LOCAL,SOCK_DGRAM)");
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return;
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}
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rc = ioctl(sock_hw, SIOCGHWADDR, &ifr);
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close(sock_hw);
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if (rc != 0)
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return;
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/*
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* If this is definitely a lagg device or the hwaddr
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* matches the link addr, don't bother.
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*/
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if (memcmp(ifr.ifr_addr.sa_data, laggaddr, sdl->sdl_alen) == 0 ||
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memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl), sdl->sdl_alen) == 0)
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goto pcp;
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print_ether((const struct ether_addr *)&ifr.ifr_addr.sa_data, "hwaddr");
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pcp:
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print_pcp(ctx->io_s);
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}
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#else
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static uint8_t
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convert_iftype(uint8_t iftype)
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{
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switch (iftype) {
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case IFT_IEEE8023ADLAG:
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return (IFT_ETHER);
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case IFT_INFINIBANDLAG:
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return (IFT_INFINIBAND);
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}
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return (iftype);
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}
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static void
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link_status_nl(if_ctx *ctx, if_link_t *link, if_addr_t *ifa __unused)
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{
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if (link->ifla_address != NULL) {
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struct sockaddr_dl sdl = {
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.sdl_len = sizeof(struct sockaddr_dl),
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.sdl_family = AF_LINK,
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.sdl_type = convert_iftype(link->ifi_type),
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.sdl_alen = NLA_DATA_LEN(link->ifla_address),
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};
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memcpy(LLADDR(&sdl), NLA_DATA(link->ifla_address), sdl.sdl_alen);
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print_lladdr(&sdl);
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if (link->iflaf_orig_hwaddr != NULL) {
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struct nlattr *hwaddr = link->iflaf_orig_hwaddr;
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if (memcmp(NLA_DATA(hwaddr), NLA_DATA(link->ifla_address), sdl.sdl_alen))
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print_ether((struct ether_addr *)NLA_DATA(hwaddr), "hwaddr");
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}
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}
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if (convert_iftype(link->ifi_type) == IFT_ETHER)
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print_pcp(ctx->io_s);
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}
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#endif
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static void
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link_getaddr(const char *addr, int which)
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{
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char *temp;
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struct sockaddr_dl sdl;
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struct sockaddr *sa = &link_ridreq.ifr_addr;
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if (which != ADDR)
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errx(1, "can't set link-level netmask or broadcast");
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if (!strcmp(addr, "random")) {
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sdl.sdl_len = sizeof(sdl);
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sdl.sdl_alen = ETHER_ADDR_LEN;
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sdl.sdl_nlen = 0;
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sdl.sdl_family = AF_LINK;
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arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN);
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/* Non-multicast and claim it is locally administered. */
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sdl.sdl_data[0] &= 0xfc;
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sdl.sdl_data[0] |= 0x02;
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} else {
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if ((temp = malloc(strlen(addr) + 2)) == NULL)
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errx(1, "malloc failed");
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temp[0] = ':';
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strcpy(temp + 1, addr);
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sdl.sdl_len = sizeof(sdl);
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link_addr(temp, &sdl);
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free(temp);
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}
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if (sdl.sdl_alen > sizeof(sa->sa_data))
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errx(1, "malformed link-level address");
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sa->sa_family = AF_LINK;
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sa->sa_len = sdl.sdl_alen;
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bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
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}
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static struct afswtch af_link = {
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.af_name = "link",
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.af_af = AF_LINK,
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#ifdef WITHOUT_NETLINK
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.af_status = link_status,
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#else
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.af_status = link_status_nl,
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#endif
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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.af_exec = af_exec_ioctl,
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};
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static struct afswtch af_ether = {
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.af_name = "ether",
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.af_af = AF_LINK,
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#ifdef WITHOUT_NETLINK
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.af_status = link_status,
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#else
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.af_status = link_status_nl,
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#endif
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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.af_exec = af_exec_ioctl,
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};
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static struct afswtch af_lladdr = {
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.af_name = "lladdr",
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.af_af = AF_LINK,
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#ifdef WITHOUT_NETLINK
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.af_status = link_status,
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#else
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.af_status = link_status_nl,
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#endif
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.af_getaddr = link_getaddr,
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.af_aifaddr = SIOCSIFLLADDR,
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.af_addreq = &link_ridreq,
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.af_exec = af_exec_ioctl,
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};
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static __constructor void
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link_ctor(void)
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{
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af_register(&af_link);
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af_register(&af_ether);
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af_register(&af_lladdr);
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}
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