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/* $Id: interface.c 114 2004-12-19 00:08:01Z lennart $ */
/*
* This file is part of ifplugd.
*
* ifplugd is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* ifplugd is distributed in the hope that 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 ifplugd; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <linux/sockios.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <syslog.h>
#include <string.h>
#include <errno.h>
#include <netinet/in.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <assert.h>
#include "ethtool-local.h"
#include "interface.h"
#include "wireless.h"
#include <libdaemon/dlog.h>
void interface_up(int fd, char *iface) {
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name)-1);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: Could not get interface flags.");
return;
}
if ((ifr.ifr_flags & IFF_UP) == IFF_UP)
return;
if (ioctl(fd, SIOCGIFADDR, &ifr) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: Could not get interface address.");
} else if (ifr.ifr_addr.sa_family != AF_INET) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: The interface is not IP-based.");
} else {
((struct sockaddr_in *)(&ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY;
if (ioctl(fd, SIOCSIFADDR, &ifr) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: Could not set interface address.");
}
}
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: Could not get interface flags.");
return;
}
ifr.ifr_flags |= IFF_UP;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) < 0)
if (interface_do_message)
daemon_log(LOG_WARNING, "Warning: Could not set interface flags.");
}
interface_status_t interface_detect_beat_mii(int fd, char *iface) {
struct ifreq ifr;
if (interface_auto_up)
interface_up(fd, iface);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name)-1);
if (ioctl(fd, SIOCGMIIPHY, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCGMIIPHY failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
((unsigned short*) &ifr.ifr_data)[1] = 1;
if (ioctl(fd, SIOCGMIIREG, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCGMIIREG failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
return (((unsigned short*) &ifr.ifr_data)[3] & 0x0004) ? IFSTATUS_UP : IFSTATUS_DOWN;
}
interface_status_t interface_detect_beat_priv(int fd, char *iface) {
struct ifreq ifr;
if (interface_auto_up)
interface_up(fd, iface);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name)-1);
if (ioctl(fd, SIOCDEVPRIVATE, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCDEVPRIVATE failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
((unsigned short*) &ifr.ifr_data)[1] = 1;
if (ioctl(fd, SIOCDEVPRIVATE+1, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCDEVPRIVATE+1 failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
return (((unsigned short*) &ifr.ifr_data)[3] & 0x0004) ? IFSTATUS_UP : IFSTATUS_DOWN;
}
interface_status_t interface_detect_beat_ethtool(int fd, char *iface) {
struct ifreq ifr;
struct ethtool_value edata;
if (interface_auto_up)
interface_up(fd, iface);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name)-1);
edata.cmd = ETHTOOL_GLINK;
ifr.ifr_data = (caddr_t) &edata;
if (ioctl(fd, SIOCETHTOOL, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "ETHTOOL_GLINK failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
return edata.data ? IFSTATUS_UP : IFSTATUS_DOWN;
}
interface_status_t interface_detect_beat_iff(int fd, char *iface) {
struct ifreq ifr;
if (interface_auto_up)
interface_up(fd, iface);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof(ifr.ifr_name)-1);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) == -1) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCGIFFLAGS failed: %s", strerror(errno));
return IFSTATUS_ERR;
}
return ifr.ifr_flags & IFF_RUNNING ? IFSTATUS_UP : IFSTATUS_DOWN;
}
static int get_wlan_qual_old(char *iface) {
FILE *f;
char buf[256];
char *bp;
int l, q = -1;
l = strlen(iface);
if (!(f = fopen("/proc/net/wireless", "r"))) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Failed to open /proc/net/wireless: %s",strerror(errno));
return -1;
}
while (fgets(buf, sizeof(buf)-1, f)) {
bp = buf;
while (*bp && isspace(*bp))
bp++;
if(!strncmp(bp, iface, l) && bp[l]==':') {
/* skip device name */
if (!(bp = strchr(bp,' ')))
break;
bp++;
/* skip status */
if (!(bp = strchr(bp,' ')))
break;
q = atoi(bp);
break;
};
}
fclose(f);
if (q < 0) {
if (interface_do_message)
daemon_log(LOG_ERR, "Failed to find interface in /proc/net/wireless");
}
return q;
}
static int get_wlan_qual_new(int fd, char *iface) {
struct iwreq req;
struct iw_statistics q;
static struct iw_range range;
memset(&req, 0, sizeof(req));
strncpy(req.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
req.u.data.pointer = (caddr_t) &q;
req.u.data.length = sizeof(q);
req.u.data.flags = 1;
if (ioctl(fd, SIOCGIWSTATS, &req) < 0) {
if (interface_do_message)
daemon_log(LOG_ERR, "Failed to get interface quality: %s\n", strerror(errno));
return -1;
}
memset(&req, 0, sizeof(req));
strncpy(req.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
memset(&range, 0, sizeof(struct iw_range));
req.u.data.pointer = (caddr_t) ⦥
req.u.data.length = sizeof(struct iw_range);
req.u.data.flags = 0;
if (ioctl(fd, SIOCGIWRANGE, &req) < 0) {
if (interface_do_message)
daemon_log(LOG_ERR, "SIOCGIWRANGE failed: %s\n", strerror(errno));
return -1;
}
/* Test if both qual and level are on their lowest level */
if (q.qual.qual <= 0 &&
(q.qual.level > range.max_qual.level ? q.qual.level <= 156 : q.qual.level <= 0))
return 0;
return 1;
}
static int is_assoc_ap(uint8_t mac[ETH_ALEN]) {
int b, j;
b = 1;
for (j = 1; j < ETH_ALEN; j++)
if (mac[j] != mac[0]) {
b = 0;
break;
}
return !b || (mac[0] != 0xFF && mac[0] != 0x44 && mac[0] != 0x00);
}
interface_status_t interface_detect_beat_wlan(int fd, char *iface) {
uint8_t mac[6];
int q;
struct iwreq req;
if (interface_auto_up)
interface_up(fd, iface);
memset(&req, 0, sizeof(req));
strncpy(req.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
if (ioctl(fd, SIOCGIWAP, &req) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Failed to get AP address: %s",strerror(errno));
return IFSTATUS_ERR;
}
memcpy(mac, &(req.u.ap_addr.sa_data), ETH_ALEN);
if (!is_assoc_ap(mac))
return IFSTATUS_DOWN;
if ((q = get_wlan_qual_new(fd, iface)) < 0)
if ((q = get_wlan_qual_old(iface)) < 0) {
if (interface_do_message)
daemon_log(LOG_WARNING, "Failed to get wireless link quality.");
return IFSTATUS_ERR;
}
return q > 0 ? IFSTATUS_UP : IFSTATUS_DOWN;
}
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