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lldp_util.c
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/*******************************************************************************
LLDP Agent Daemon (LLDPAD) Software
Copyright(c) 2007-2012 Intel Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Contact Information:
Issue Tracker: https://github.com/intel/openlldp/issues
*******************************************************************************/
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if_arp.h>
#include <netlink/msg.h>
#include <arpa/inet.h>
#include <linux/wireless.h>
#include <linux/sockios.h>
#include <dirent.h>
#include "linux/if_bonding.h"
#include "linux/if_bridge.h"
#include "linux/ethtool.h"
#include "linux/rtnetlink.h"
#include "linux/if_vlan.h"
#include "linux/if.h"
#include "lldp.h"
#include "lldp_util.h"
#include "messages.h"
#include "lldp_dcbx_nl.h"
static int hex2num(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return -1;
}
static int hex2byte(const char *hex)
{
int a, b;
a = hex2num(*hex++);
if (a < 0)
return -1;
b = hex2num(*hex++);
if (b < 0)
return -1;
return (a << 4) | b;
}
/**
* bin2hexstr - Convert binary data to ASCII string
* @hex: ASCII hex string (e.g., "01ab")
* @buf: Buffer for the binary data
* @len: Length of the text to convert in bytes (of buf); hex will be double
* this size
* Returns: 0 on success, -1 on failure (invalid hex string)
*/
#define BYTE2CHAR(b) (((b) > 9) ? ((b) - 0xa + 'A') : ((b) + '0'))
int bin2hexstr(const u8 *hex, size_t hexlen, char *buf, size_t buflen)
{
u8 b;
size_t i, j;
for (i = j = 0; (i < hexlen) && (j < buflen); i++, j +=2) {
b = (hex[i] & 0xf0) >> 4;
buf[j] = BYTE2CHAR(b);
b = hex[i] & 0x0f;
buf[j + 1] = BYTE2CHAR(b);
}
return 0;
}
/**
* hexstr2bin - Convert ASCII hex string into binary data
* @hex: ASCII hex string (e.g., "01ab")
* @buf: Buffer for the binary data
* @len: Length of the text to convert in bytes (of buf); hex will be double
* this size
* Returns: 0 on success, -1 on failure (invalid hex string)
*/
int hexstr2bin(const char *hex, u8 *buf, size_t len)
{
size_t i;
int a;
const char *ipos = hex;
u8 *opos = buf;
for (i = 0; i < len; i++) {
a = hex2byte(ipos);
if (a < 0)
return -1;
*opos++ = a;
ipos += 2;
}
return 0;
}
/* assumes input is pointer to two hex digits */
/* returns -1 on error */
int hex2int(char *b)
{
int i;
int n=0;
int m;
for (i=0,m=1; i<2; i++,m--) {
if (isxdigit(*(b+i))) {
if (*(b+i) <= '9')
n |= (*(b+i) & 0x0f) << (4*m);
else
n |= ((*(b+i) & 0x0f) + 9) << (4*m);
}
else {
return -1;
}
}
return n;
}
char *print_mac(char *mac, char *buf)
{
sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
(unsigned char)*(mac + 0),
(unsigned char)*(mac + 1),
(unsigned char)*(mac + 2),
(unsigned char)*(mac + 3),
(unsigned char)*(mac + 4),
(unsigned char)*(mac + 5));
return buf;
}
static int get_ioctl_socket(void)
{
static int ioctl_socket = -1;
if (ioctl_socket >= 0)
return ioctl_socket;
ioctl_socket = socket(PF_INET, SOCK_DGRAM, 0);
if (ioctl_socket < 0) {
int err = errno;
perror("socket create failed\n");
errno = err;
}
return ioctl_socket;
}
int is_valid_lldp_device(const char *device_name)
{
if (is_loopback(device_name))
return 0;
if (is_vlan(device_name))
return 0;
if (is_bridge(device_name))
return 0;
if (is_macvtap(device_name))
return 0;
return 1;
}
/**
* is_bond - check if interface is a bond interface
* @ifname: name of the interface
*
* Returns 0 if ifname is not a bond, 1 if it is a bond.
*/
int is_bond(const char *ifname)
{
int fd;
int rc = 0;
struct ifreq ifr;
ifbond ifb;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, ifname);
memset(&ifb, 0, sizeof(ifb));
ifr.ifr_data = (caddr_t)&ifb;
if (ioctl(fd, SIOCBONDINFOQUERY, &ifr) == 0)
rc = 1;
}
return rc;
}
/**
* get_src_mac_from_bond - select a source MAC to use for slave
* @bond_port: pointer to port structure for a bond interface
* @ifname: interface name of the slave port
* @addr: address of buffer in which to return the selected MAC address
*
* Checks to see if ifname is a slave of the bond port. If it is,
* then a
* Returns 0 if a source MAC from the bond could not be found. 1 is
* returned if the slave was found in the bond. addr is updated with
* the source MAC that should be used.
*/
int get_src_mac_from_bond(struct port *bond_port, char *ifname, u8 *addr)
{
int fd;
struct ifreq ifr;
ifbond ifb;
ifslave ifs;
char act_ifname[IFNAMSIZ];
unsigned char bond_mac[ETH_ALEN], san_mac[ETH_ALEN];
int found = 0;
int i;
fd = get_ioctl_socket();
if (fd < 0)
return 0;
memset(bond_mac, 0, sizeof(bond_mac));
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, bond_port->ifname);
memset(&ifb, 0, sizeof(ifb));
ifr.ifr_data = (caddr_t)&ifb;
if (ioctl(fd,SIOCBONDINFOQUERY, &ifr) == 0) {
/* get the MAC address for the current bond port */
if (ioctl(fd,SIOCGIFHWADDR, &ifr) == 0)
memcpy(bond_mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
else
perror("error getting bond MAC address");
/* scan the bond's slave ports and looking for the
* current port and the active slave port.
*/
memset(act_ifname, 0, sizeof(act_ifname));
for (i = 0; i < ifb.num_slaves; i++) {
memset(&ifs, 0, sizeof(ifs));
ifs.slave_id = i;
ifr.ifr_data = (caddr_t)&ifs;
if (ioctl(fd,SIOCBONDSLAVEINFOQUERY, &ifr) == 0) {
if (!strncmp(ifs.slave_name, ifname,
IFNAMSIZ))
found = 1;
if (ifs.state == BOND_STATE_ACTIVE)
strncpy(act_ifname, ifs.slave_name,
IFNAMSIZ);
}
}
}
/* current port is not a slave of the bond */
if (!found)
return 0;
/* Get slave port's current perm MAC address
* This will be the default return value
*/
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, ifname);
if (ioctl(fd,SIOCGIFHWADDR, &ifr) == 0) {
memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
}
else {
perror("error getting slave MAC address");
return 0;
}
switch (ifb.bond_mode) {
case BOND_MODE_ACTIVEBACKUP:
/* If current port is not the active slave, then
* if the bond MAC is equal to the port's
* permanent MAC, then find and return
* the permanent MAC of the active
* slave port. Otherwise, return the
* permanent MAC of the port.
*/
if (strncmp(ifname, act_ifname, IFNAMSIZ))
if (get_perm_hwaddr(ifname, addr, san_mac) == 0)
if (!memcmp(bond_mac, addr, ETH_ALEN))
get_perm_hwaddr(act_ifname, addr,
san_mac);
break;
default:
/* Use the current MAC of the port */
break;
}
return 1;
}
/*
* Return true if the mac address is valid (non-zero and no hardware
* broadcast address)
*/
int is_valid_mac(const u8 *mac)
{
static const u8 zero_mac[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static const u8 ff_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
static const u8 iana_mcast[ETH_ALEN] = {0x01, 0x00, 0x5E};
static const u8 ipv6_mcast[ETH_ALEN] = {0x33, 0x33};
if(memcmp(mac, zero_mac, ETH_ALEN) == 0 ||
memcmp(mac, ff_mac, ETH_ALEN) == 0)
return 0;
/* IANA multicast and ipv6 multicast mac address
* For reference check document:
* https://www.iana.org/assignments/ethernet-numbers/ethernet-numbers.xhtml
*/
if(memcmp(mac, iana_mcast, 3) == 0 ||
memcmp(mac, ipv6_mcast, 2) == 0)
return 0;
return 1;
}
int read_int(const char *path)
{
int rc = -1;
char buf[256];
FILE *f = fopen(path, "r");
if (f) {
if (fgets(buf, sizeof(buf), f))
rc = atoi(buf);
fclose(f);
}
return rc;
}
int read_bool(const char *path)
{
return read_int(path) > 0;
}
int get_ifflags(const char *ifname)
{
int fd;
int flags = 0;
struct ifreq ifr;
/* use ioctl */
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, &ifr) == 0)
flags = ifr.ifr_flags;
}
return flags;
}
int get_ifname(int ifindex, char *ifname)
{
int fd;
int rc;
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
fd = get_ioctl_socket();
if (fd < 0)
return -1;
ifr.ifr_ifindex = ifindex;
rc = ioctl(fd, SIOCGIFNAME, &ifr);
if (rc >= 0)
memcpy(ifname, ifr.ifr_name, IFNAMSIZ);
return rc;
}
int get_ifpflags(const char *ifname)
{
int fd;
int flags = 0;
struct ifreq ifr;
/* use ioctl */
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFPFLAGS, &ifr) == 0)
flags = ifr.ifr_flags;
}
return flags;
}
int get_iftype(const char *ifname)
{
char path[256];
snprintf(path, sizeof(path), "/sys/class/net/%s/type", ifname);
return read_int(path);
}
int get_iffeatures(const char *ifname)
{
char path[256];
snprintf(path, sizeof(path), "/sys/class/net/%s/features", ifname);
return read_int(path);
}
int get_iflink(const char *ifname)
{
char path[256];
snprintf(path, sizeof(path), "/sys/class/net/%s/iflink", ifname);
return read_int(path);
}
int is_ether(const char *ifname)
{
/* check for bridge in sysfs */
int type = get_iftype(ifname);
return (type == ARPHRD_ETHER) || (type == ARPHRD_EETHER);
}
int is_loopback(const char *ifname)
{
return get_ifflags(ifname) & IFF_LOOPBACK;
}
int is_p2p(const char *ifname)
{
return get_ifflags(ifname) & IFF_POINTOPOINT;
}
int is_noarp(const char *ifname)
{
return get_ifflags(ifname) & IFF_NOARP;
}
int is_mbond(const char *ifname)
{
return get_ifflags(ifname) & IFF_MASTER;
}
int is_sbond(const char *ifname)
{
return get_ifflags(ifname) & IFF_SLAVE;
}
int is_slave(const char *ifmaster, const char *ifslave)
{
int i;
int rc = 0;
int fd;
struct ifreq ifr;
struct ifbond ifb;
struct ifslave ifs;
if (!is_mbond(ifmaster))
goto out_done;
fd = get_ioctl_socket();
if (fd < 0)
goto out_done;
memset(&ifr, 0, sizeof(ifr));
memset(&ifb, 0, sizeof(ifb));
STRNCPY_TERMINATED(ifr.ifr_name, ifmaster, IFNAMSIZ);
ifr.ifr_data = (caddr_t)&ifb;
if (ioctl(fd, SIOCBONDINFOQUERY, &ifr))
goto out_done;
for (i = 0; i < ifb.num_slaves; i++) {
memset(&ifs, 0, sizeof(ifs));
ifs.slave_id = i;
ifr.ifr_data = (caddr_t)&ifs;
if (ioctl(fd, SIOCBONDSLAVEINFOQUERY, &ifr) == 0) {
if (!strncmp(ifs.slave_name, ifslave, IFNAMSIZ)) {
rc = 1;
break;
}
}
}
out_done:
return rc;
}
int get_ifidx(const char *ifname)
{
int fd;
int idx = 0;
struct ifreq ifreq;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifreq, 0, sizeof(ifreq));
STRNCPY_TERMINATED(ifreq.ifr_name, ifname, IFNAMSIZ);
if (ioctl(fd, SIOCGIFINDEX, &ifreq) == 0)
idx = ifreq.ifr_ifindex;
}
return idx;
}
int get_master(const char *ifname)
{
int i;
int idx = 0;
int fd;
int cnt;
struct ifreq *ifr = NULL;
struct ifconf ifc;
char ifcbuf[sizeof(struct ifreq) * 32];
/* if it's a master bond, return its own index */
if (is_mbond(ifname))
return get_ifidx(ifname);
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifc, 0, sizeof(ifc));
memset(ifcbuf, 0, sizeof(ifcbuf));
ifc.ifc_buf = ifcbuf;
ifc.ifc_len = sizeof(ifcbuf);
if (ioctl(fd, SIOCGIFCONF, (caddr_t)&ifc) == 0) {
ifr = ifc.ifc_req;
cnt = ifc.ifc_len/sizeof(struct ifreq);
for (i = 0; i < cnt; i++, ifr++) {
if (!strncmp(ifr->ifr_name, ifname, IFNAMSIZ))
continue;
if (!is_mbond(ifr->ifr_name))
continue;
if (!is_slave(ifr->ifr_name, ifname))
continue;
if (ioctl(fd, SIOCGIFINDEX, ifr) == 0)
idx = ifr->ifr_ifindex;
break;
}
}
}
return idx;
}
int is_bridge(const char *ifname)
{
int fd;
int rc = 0;
char path[256];
DIR *dirp;
if (!is_ether(ifname)) {
return 0;
}
/* check for bridge in sysfs */
snprintf(path, sizeof(path), "/sys/class/net/%s/bridge", ifname);
dirp = opendir(path);
if (dirp) {
closedir(dirp);
rc = 1;
} else {
/* use ioctl */
fd = get_ioctl_socket();
if (fd >= 0) {
struct ifreq ifr;
struct __bridge_info bi;
unsigned long args[4] = { BRCTL_GET_BRIDGE_INFO,
(unsigned long) &bi, 0, 0 };
ifr.ifr_data = (char *)args;
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) == 0)
rc = 1;
}
}
return rc;
}
int is_bridge_port(const char *ifname)
{
int rc = 0;
char path[256];
DIR *dirp;
if (!is_ether(ifname)) {
return 0;
}
/* check if the given ifname is a bridge port in sysfs */
snprintf(path, sizeof(path), "/sys/class/net/%s/brport/", ifname);
dirp = opendir(path);
if (dirp) {
closedir(dirp);
rc = 1;
}
return rc;
}
int is_vlan(const char *ifname)
{
int fd;
int rc = 0;
struct vlan_ioctl_args ifv;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifv, 0, sizeof(ifv));
ifv.cmd = GET_VLAN_REALDEV_NAME_CMD;
STRNCPY_TERMINATED(ifv.device1, ifname, sizeof(ifv.device1));
if (ioctl(fd, SIOCGIFVLAN, &ifv) == 0)
rc = 1;
}
return rc;
}
int is_vlan_capable(const char *ifname)
{
int features = get_iffeatures(ifname);
#ifndef NETIF_F_VLAN_CHALLENGED
#define NETIF_F_VLAN_CHALLENGED 1024
#endif
return !(features & NETIF_F_VLAN_CHALLENGED);
}
int is_wlan(const char *ifname)
{
int fd;
int rc = 0;
struct iwreq iwreq;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&iwreq, 0, sizeof(iwreq));
STRNCPY_TERMINATED(iwreq.ifr_name, ifname, sizeof(iwreq.ifr_name));
if (ioctl(fd, SIOCGIWNAME, &iwreq) == 0)
rc = 1;
}
return rc;
}
#define NLMSG_SIZE 1024
static struct nla_policy ifla_info_policy[IFLA_INFO_MAX + 1] =
{
[IFLA_INFO_KIND] = { .type = NLA_STRING},
[IFLA_INFO_DATA] = { .type = NLA_NESTED },
[IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING},
[IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
};
int is_macvtap(const char *ifname)
{
int ret, s, realsize;
struct nlmsghdr *nlh;
void *temp;
struct ifinfomsg *ifinfo;
struct nlattr *tb[IFLA_MAX+1],
*tb2[IFLA_INFO_MAX+1];
s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (s < 0) {
return false;
}
nlh = calloc(1, NLMSG_SIZE);
if (!nlh) {
goto out;
}
nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
nlh->nlmsg_type = RTM_GETLINK;
nlh->nlmsg_flags = NLM_F_REQUEST;
ifinfo = NLMSG_DATA(nlh);
ifinfo->ifi_family = AF_UNSPEC;
ifinfo->ifi_index = get_ifidx(ifname);
ret = send(s, nlh, nlh->nlmsg_len, 0);
if (ret < 0) {
goto out_free;
}
do {
realsize = recv(s, NULL, 0, MSG_DONTWAIT | MSG_PEEK | MSG_TRUNC);
} while ((realsize < 0) && errno == EINTR);
if (realsize < 0) {
goto out_free;
}
temp = realloc(nlh, realsize);
if (!temp) {
goto out_free;
}
memset(temp, 0, realsize);
nlh = temp;
do {
ret = recv(s, (void *) nlh, realsize, MSG_DONTWAIT);
} while ((ret < 0) && errno == EINTR);
if (nlmsg_parse(nlh, sizeof(struct ifinfomsg),
(struct nlattr **)&tb, IFLA_MAX, NULL)) {
goto out_free;
}
if (tb[IFLA_IFNAME]) {
ifname = (char *)RTA_DATA(tb[IFLA_IFNAME]);
} else {
ifinfo = (struct ifinfomsg *)NLMSG_DATA(nlh);
}
if (tb[IFLA_LINKINFO]) {
if (nla_parse_nested(tb2, IFLA_INFO_MAX, tb[IFLA_LINKINFO],
ifla_info_policy)) {
goto out_free;
}
if (tb2[IFLA_INFO_KIND]) {
char *kind = (char*)(RTA_DATA(tb2[IFLA_INFO_KIND]));
if (!(strcmp("macvtap", kind) && strcmp("macvlan", kind))) {
free(nlh);
close(s);
return true;
}
}
} else {
goto out_free;
}
out_free:
free(nlh);
out:
close(s);
return false;
}
static int is_router(void)
{
int rc = 0;
char path[256];
snprintf(path, sizeof(path), "/proc/sys/net/ipv4/conf/all/forwarding");
rc = read_bool(path);
snprintf(path, sizeof(path), "/proc/sys/net/ipv6/conf/all/forwarding");
rc |= read_bool(path);
return rc;
}
int is_active(const char *ifname)
{
int fd;
int rc = 0;
struct ifreq ifr;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, &ifr) == 0)
if (ifr.ifr_flags & IFF_UP)
rc = 1;
}
return rc;
}
int is_autoneg_supported(const char *ifname)
{
int rc = 0;
int fd;
struct ifreq ifr;
struct ethtool_cmd cmd;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
memset(&cmd, 0, sizeof(cmd));
cmd.cmd = ETHTOOL_GSET;
ifr.ifr_data = &cmd;
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCETHTOOL, &ifr) == 0)
if (cmd.supported & SUPPORTED_Autoneg)
rc = 1;
}
return rc;
}
int is_autoneg_enabled(const char *ifname)
{
int rc = 0;
int fd;
struct ifreq ifr;
struct ethtool_cmd cmd;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
memset(&cmd, 0, sizeof(cmd));
cmd.cmd = ETHTOOL_GSET;
ifr.ifr_data = &cmd;
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCETHTOOL, &ifr) == 0)
rc = cmd.autoneg;
}
return rc;
}
/* IETF RFC 3636 dot3MauType: http://www.rfc-editor.org/rfc/rfc3636.txt */
#define MAUCAPADV_bOther (1 << 0) /* other or unknown */
#define MAUCAPADV_b10baseT (1 << 1) /* 10BASE-T half duplex mode */
#define MAUCAPADV_b10baseTFD (1 << 2) /* 10BASE-T full duplex mode */
#define MAUCAPADV_b100baseT4 (1 << 3) /* 100BASE-T4 */
#define MAUCAPADV_b100baseTX (1 << 4) /* 100BASE-TX half duplex mode */
#define MAUCAPADV_b100baseTXFD (1 << 5) /* 100BASE-TX full duplex mode */
#define MAUCAPADV_b100baseT2 (1 << 6) /* 100BASE-T2 half duplex mode */
#define MAUCAPADV_b100baseT2FD (1 << 7) /* 100BASE-T2 full duplex mode */
#define MAUCAPADV_bFdxPause (1 << 8) /* PAUSE for full-duplex links */
#define MAUCAPADV_bFdxAPause (1 << 9) /* Asymmetric PAUSE for full-duplex links */
#define MAUCAPADV_bFdxSPause (1 << 10) /* Symmetric PAUSE for full-duplex links */
#define MAUCAPADV_bFdxBPause (1 << 11) /* Asymmetric and Symmetric PAUSE for full-duplex links */
#define MAUCAPADV_b1000baseX (1 << 12) /* 1000BASE-X, -LX, -SX, -CX half duplex mode */
#define MAUCAPADV_b1000baseXFD (1 << 13) /* 1000BASE-X, -LX, -SX, -CX full duplex mode */
#define MAUCAPADV_b1000baseT (1 << 14) /* 1000BASE-T half duplex mode */
#define MAUCAPADV_b1000baseTFD (1 << 15) /* 1000BASE-T full duplex mode */
int get_maucaps(const char *ifname)
{
int fd;
u16 caps = MAUCAPADV_bOther;
struct ifreq ifr;
struct ethtool_cmd cmd;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
memset(&cmd, 0, sizeof(cmd));
cmd.cmd = ETHTOOL_GSET;
ifr.ifr_data = &cmd;
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCETHTOOL, &ifr) == 0) {
if (cmd.advertising & ADVERTISED_10baseT_Half)
caps |= MAUCAPADV_b10baseT;
if (cmd.advertising & ADVERTISED_10baseT_Full)
caps |= MAUCAPADV_b10baseTFD;
if (cmd.advertising & ADVERTISED_100baseT_Half)
caps |= MAUCAPADV_b100baseTX;
if (cmd.advertising & ADVERTISED_100baseT_Full)
caps |= MAUCAPADV_b100baseTXFD;
if (cmd.advertising & ADVERTISED_1000baseT_Half)
caps |= MAUCAPADV_b1000baseT;
if (cmd.advertising & ADVERTISED_1000baseT_Full)
caps |= MAUCAPADV_b1000baseTFD;
if (cmd.advertising & ADVERTISED_Pause)
caps |= (MAUCAPADV_bFdxPause | MAUCAPADV_bFdxSPause);
if (cmd.advertising & ADVERTISED_Asym_Pause)
caps |= MAUCAPADV_bFdxAPause;
if (cmd.advertising & (ADVERTISED_Asym_Pause | ADVERTISED_Pause))
caps |= MAUCAPADV_bFdxBPause;
}
}
return caps;
}
int get_mautype(const char *ifname)
{
int rc = 0;
int fd;
struct ifreq ifr;
struct ethtool_cmd cmd;
u32 speed;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
memset(&cmd, 0, sizeof(cmd));
cmd.cmd = ETHTOOL_GSET;
ifr.ifr_data = &cmd;
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCETHTOOL, &ifr) == 0) {
/* TODO: too many dot3MauTypes,
* should check duplex, speed, and port */
speed = (cmd.speed_hi << 16) | cmd.speed;
if (cmd.port == PORT_AUI)
rc = DOT3MAUTYPE_AUI;
else if (speed == SPEED_10)
rc = DOT3MAUTYPE_10BaseT;
else if (speed == SPEED_100)
rc = DOT3MAUTYPE_100BaseTXFD;
else if (speed == SPEED_1000)
rc = DOT3MAUTYPE_1000BaseTFD;
}
}
return rc;
}
int get_mtu(const char *ifname)
{
int fd;
int rc = 0;
struct ifreq ifr;
fd = get_ioctl_socket();
if (fd >= 0) {
memset(&ifr, 0, sizeof(ifr));
STRNCPY_TERMINATED(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFMTU, &ifr) == 0)
rc = ifr.ifr_mtu;
}
return rc;
}
int get_mfs(const char *ifname)
{
int mfs = get_mtu(ifname);
#ifndef VLAN_HLEN
#define VLAN_HLEN 4
#endif
if (mfs) {
mfs += ETH_HLEN + ETH_FCS_LEN;
if (is_vlan_capable(ifname))
mfs += VLAN_HLEN;
}
return mfs;
}
int get_mac(const char *ifname, u8 mac[], bool perm_mac)
{
int ret, s;
struct nlmsghdr *nlh;
struct ifinfomsg *ifinfo;
struct nlattr *tb[IFLA_MAX+1],
*tb2[IFLA_INFO_MAX+1];
s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (s < 0) {
goto out;
}
nlh = malloc(NLMSG_SIZE);
if (!nlh) {
goto out;
}
memset(nlh, 0, NLMSG_SIZE);
nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
nlh->nlmsg_type = RTM_GETLINK;
nlh->nlmsg_flags = NLM_F_REQUEST;
ifinfo = NLMSG_DATA(nlh);
ifinfo->ifi_family = AF_UNSPEC;
ifinfo->ifi_index = get_ifidx(ifname);
ret = send(s, nlh, nlh->nlmsg_len, 0);
if (ret < 0) {
goto out_free;
}
memset(nlh, 0, NLMSG_SIZE);
do {
ret = recv(s, (void *) nlh, NLMSG_SIZE, MSG_DONTWAIT);
} while ((ret < 0) && errno == EINTR);
if (nlmsg_parse(nlh, sizeof(struct ifinfomsg),
(struct nlattr **)&tb, IFLA_MAX, NULL)) {
goto out_free;
}