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256 lines
7.3 KiB
256 lines
7.3 KiB
/* Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file mysys/my_gethwaddr.cc
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Get hardware address for an interface.
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If there are many available, any non-zero one can be used.
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*/
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#include "my_config.h"
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#include <errno.h>
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#include <string.h>
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#ifdef SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "my_inttypes.h"
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#include "my_sys.h" // IWYU pragma: keep
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#if defined(_WIN32)
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#include "mysys/mysys_priv.h"
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#endif
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#include "mysql/service_mysql_alloc.h"
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#ifndef MAIN
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#ifdef __FreeBSD__
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/route.h>
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#include <sys/sysctl.h>
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bool my_gethwaddr(uchar *to) {
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size_t len;
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char *buf, *next, *end;
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struct if_msghdr *ifm;
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struct sockaddr_dl *sdl;
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int res = 1, mib[6] = {CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0};
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char zero_array[ETHER_ADDR_LEN] = {0};
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if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1) goto err;
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if (!(buf = static_cast<char *>(alloca(len)))) goto err;
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if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) goto err;
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end = buf + len;
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for (next = buf; res && next < end; next += ifm->ifm_msglen) {
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type == RTM_IFINFO) {
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sdl = (struct sockaddr_dl *)(ifm + 1);
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memcpy(to, LLADDR(sdl), ETHER_ADDR_LEN);
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res = memcmp(to, zero_array, ETHER_ADDR_LEN) ? 0 : 1;
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}
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}
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err:
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return res;
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}
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#elif defined(__linux__)
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#define MAX_IFS 64
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bool my_gethwaddr(uchar *to) {
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int fd = -1;
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int res = 1;
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struct ifreq ifr;
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struct ifreq ifs[MAX_IFS];
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struct ifreq *ifri = NULL;
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struct ifreq *ifend = NULL;
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char zero_array[ETHER_ADDR_LEN] = {0};
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struct ifconf ifc;
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fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd < 0) return 1;
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/* Retrieve interfaces */
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ifc.ifc_len = sizeof(ifs);
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ifc.ifc_req = ifs;
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if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
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close(fd);
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return 1;
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}
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/* Initialize out parameter */
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memcpy(to, zero_array, ETHER_ADDR_LEN);
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/* Calculate first address after array */
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ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
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/* Loop over all interfaces */
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for (ifri = ifc.ifc_req; ifri < ifend; ifri++) {
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if (ifri->ifr_addr.sa_family == AF_INET) {
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/* Reset struct, copy interface name */
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memset(&ifr, 0, sizeof(ifr));
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memcpy(ifr.ifr_name, ifri->ifr_name, sizeof(ifr.ifr_name));
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/* Get HW address, break if not 0 */
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if (ioctl(fd, SIOCGIFHWADDR, &ifr) >= 0) {
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memcpy(to, &ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
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if (memcmp(to, zero_array, ETHER_ADDR_LEN)) {
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res = 0;
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break;
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}
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}
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}
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}
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close(fd);
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return res;
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}
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#elif defined(_WIN32)
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/*
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Workaround for BUG#32082 (Definition of VOID in my_global.h conflicts with
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windows headers)
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*/
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#ifdef VOID
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#undef VOID
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#define VOID void
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#endif
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#include <iphlpapi.h>
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/*
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The following typedef is for dynamically loading iphlpapi.dll /
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GetAdaptersAddresses. Dynamic loading is used because
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GetAdaptersAddresses is not available on Windows 2000 which MySQL
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still supports. Static linking would cause an unresolved export.
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*/
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typedef DWORD(WINAPI *pfnGetAdaptersAddresses)(
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IN ULONG Family, IN DWORD Flags, IN PVOID Reserved,
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OUT PIP_ADAPTER_ADDRESSES pAdapterAddresses, IN OUT PULONG pOutBufLen);
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/*
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my_gethwaddr - Windows version
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@brief Retrieve MAC address from network hardware
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@param[out] to MAC address exactly six bytes
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@return Operation status
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@retval 0 OK
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@retval <>0 FAILED
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*/
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bool my_gethwaddr(uchar *to) {
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PIP_ADAPTER_ADDRESSES pAdapterAddresses;
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PIP_ADAPTER_ADDRESSES pCurrAddresses;
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IP_ADAPTER_ADDRESSES adapterAddresses;
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ULONG address_len;
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bool return_val = 1;
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static pfnGetAdaptersAddresses fnGetAdaptersAddresses =
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(pfnGetAdaptersAddresses)-1;
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if (fnGetAdaptersAddresses == (pfnGetAdaptersAddresses)-1) {
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/* Get the function from the DLL */
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fnGetAdaptersAddresses = (pfnGetAdaptersAddresses)GetProcAddress(
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LoadLibrary("iphlpapi.dll"), "GetAdaptersAddresses");
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}
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if (!fnGetAdaptersAddresses) return 1; /* failed to get function */
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address_len = sizeof(IP_ADAPTER_ADDRESSES);
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/* Get the required size for the address data. */
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if (fnGetAdaptersAddresses(AF_UNSPEC, 0, 0, &adapterAddresses,
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&address_len) == ERROR_BUFFER_OVERFLOW) {
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pAdapterAddresses = static_cast<PIP_ADAPTER_ADDRESSES>(
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my_malloc(key_memory_win_IP_ADAPTER_ADDRESSES, address_len, 0));
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if (!pAdapterAddresses) return 1; /* error, alloc failed */
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} else
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pAdapterAddresses = &adapterAddresses; /* one is enough don't alloc */
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/* Get the hardware info. */
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if (fnGetAdaptersAddresses(AF_UNSPEC, 0, 0, pAdapterAddresses,
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&address_len) == NO_ERROR) {
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pCurrAddresses = pAdapterAddresses;
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while (pCurrAddresses) {
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/* Look for ethernet cards. */
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if (pCurrAddresses->IfType == IF_TYPE_ETHERNET_CSMACD) {
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/* check for a good address */
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if (pCurrAddresses->PhysicalAddressLength < 6)
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continue; /* bad address */
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/* save 6 bytes of the address in the 'to' parameter */
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memcpy(to, pCurrAddresses->PhysicalAddress, 6);
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/* Network card found, we're done. */
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return_val = 0;
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break;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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}
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/* Clean up memory allocation. */
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if (pAdapterAddresses != &adapterAddresses) my_free(pAdapterAddresses);
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return return_val;
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}
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#else /* __FreeBSD__ || __linux__ || _WIN32 */
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/* just fail */
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bool my_gethwaddr(uchar *to MY_ATTRIBUTE((unused))) { return 1; }
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#endif
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#else /* MAIN */
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int main(int argc MY_ATTRIBUTE((unused)), char **argv) {
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uchar mac[6];
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uint i;
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MY_INIT(argv[0]);
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if (my_gethwaddr(mac)) {
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printf("my_gethwaddr failed with errno %d\n", errno);
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exit(1);
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}
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for (i = 0; i < sizeof(mac); i++) {
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if (i) printf(":");
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printf("%02x", mac[i]);
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}
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printf("\n");
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return 0;
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}
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#endif
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