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linuxport.cpp
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linuxport.cpp
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/*
Copyright (C) 2011 Srivats P.
This file is part of "Ostinato"
This 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>
*/
#include "linuxport.h"
#include "interfaceinfo.h"
#ifdef Q_OS_LINUX
#include "../common/qtport.h"
#include <QByteArray>
#include <QHash>
#include <QTime>
#include <errno.h>
#include <fcntl.h>
#include <netlink/route/addr.h>
#include <netlink/route/link.h>
#include <netlink/route/route.h>
#if (LIBNL_VER_NUM > 0x0302) || ((LIBNL_VER_NUM == 0x0302) && (LIBNL_VER_MIC >= 26))
#include <net/if.h>
#endif
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <linux/rtnetlink.h>
QList<LinuxPort*> LinuxPort::allPorts_;
LinuxPort::StatsMonitor *LinuxPort::monitor_;
const quint32 kMaxValue32 = 0xffffffff;
const quint64 kMaxValue64 = 0xffffffffffffffffULL;
#ifdef HAVE_IFLA_STATS64
#define X_IFLA_STATS IFLA_STATS64
typedef struct rtnl_link_stats64 x_rtnl_link_stats;
#else
#define X_IFLA_STATS IFLA_STATS
typedef struct rtnl_link_stats x_rtnl_link_stats;
#endif
nl_sock *LinuxPort::netSock_{nullptr};
nl_cache *LinuxPort::linkCache_{nullptr};
nl_cache *LinuxPort::addressCache_{nullptr};
nl_cache *LinuxPort::routeCache_{nullptr};
LinuxPort::LinuxPort(int id, const char *device)
: PcapPort(id, device)
{
isPromisc_ = true;
clearPromisc_ = false;
populateInterfaceInfo();
// We don't need per port Rx/Tx monitors for Linux
// No need to stop them because we start them only in
// PcapPort::init which has not yet been called
delete monitorRx_;
delete monitorTx_;
monitorRx_ = monitorTx_ = NULL;
// We have one monitor for both Rx/Tx of all ports
if (!monitor_)
monitor_ = new StatsMonitor();
data_.set_is_exclusive_control(hasExclusiveControl());
minPacketSetSize_ = 16;
qDebug("adding dev to all ports list <%s>", device);
allPorts_.append(this);
// A port can support either 32 or 64 bit stats - we will attempt
// to guess this for each port and initialize this variable at
// run time when the counter wraps around
maxStatsValue_ = 0;
}
LinuxPort::~LinuxPort()
{
qDebug("In %s", __FUNCTION__);
allPorts_.removeAll(this);
if (monitor_->isRunning())
{
monitor_->stop();
monitor_->wait();
}
if (clearPromisc_)
{
int sd = socket(AF_INET, SOCK_DGRAM, 0);
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, name(), sizeof(ifr.ifr_name));
if (ioctl(sd, SIOCGIFFLAGS, &ifr) != -1)
{
if (ifr.ifr_flags & IFF_PROMISC)
{
ifr.ifr_flags &= ~IFF_PROMISC;
if (ioctl(sd, SIOCSIFFLAGS, &ifr) == -1)
qDebug("Failed clearing promisc flag. SIOCSIFFLAGS failed: %s",
strerror(errno));
}
}
else
qDebug("Failed clearing promisc flag. SIOCGIFFLAGS failed: %s",
strerror(errno));
close(sd);
}
}
void LinuxPort::fetchHostNetworkInfo()
{
netSock_ = nl_socket_alloc();
if (!netSock_) {
qWarning("Failed to open netlink socket");
return;
}
if (nl_connect(netSock_, NETLINK_ROUTE) < 0) {
qWarning("Failed to connect netlink socket");
return;
}
if (rtnl_link_alloc_cache(netSock_, AF_UNSPEC, &linkCache_) < 0) {
qWarning("Failed to populate link cache");
return;
}
if (rtnl_addr_alloc_cache(netSock_, &addressCache_) < 0) {
qWarning("Failed to populate addr cache");
return;
}
if (rtnl_route_alloc_cache(netSock_, AF_UNSPEC, 0, &routeCache_) < 0) {
qWarning("Failed to populate addr cache");
return;
}
}
void LinuxPort::freeHostNetworkInfo()
{
nl_cache_put(routeCache_);
nl_cache_put(addressCache_);
nl_cache_put(linkCache_);
nl_socket_free(netSock_);
}
void LinuxPort::init()
{
if (!monitor_->isRunning())
monitor_->start();
monitor_->waitForSetupFinished();
if (!isPromisc_)
addNote("Non Promiscuous Mode");
AbstractPort::init();
}
OstProto::LinkState LinuxPort::linkState()
{
return linkState_;
}
bool LinuxPort::hasExclusiveControl()
{
// TODO
return false;
}
bool LinuxPort::setExclusiveControl(bool /*exclusive*/)
{
// TODO
return false;
}
void LinuxPort::populateInterfaceInfo()
{
//
// Find Mac
//
if (!linkCache_) {
qWarning("rtnetlink link cache empty for %s", name());
return;
}
rtnl_link *link = rtnl_link_get_by_name(linkCache_, name());
if (!link) {
qWarning("rtnetlink link not found for %s", name());
return;
}
nl_addr *addr = rtnl_link_get_addr(link);
if (nl_addr_get_family(addr) != AF_LLC) {
qWarning("unexpected mac family found for %s:%d",
name(), nl_addr_get_family(addr));
rtnl_link_put(link);
return;
}
if (nl_addr_get_prefixlen(addr) != 48) {
qWarning("unexpected mac length for %s:%d",
name(), nl_addr_get_prefixlen(addr));
rtnl_link_put(link);
return;
}
quint64 mac = qFromBigEndian<quint64>(nl_addr_get_binary_addr(addr)) >> 16;
if (!mac) {
qWarning("zero mac for %s - skipping", name());
rtnl_link_put(link);
return;
}
int ifIndex = rtnl_link_get_ifindex(link);
rtnl_link_put(link);
interfaceInfo_ = new InterfaceInfo;
interfaceInfo_->mac = mac;
//
// Find gateways
//
quint32 gw4 = 0;
UInt128 gw6 = 0;
for (rtnl_route *rt = routeCache_ ? (rtnl_route*) nl_cache_get_first(routeCache_) : 0;
rt && (!gw4 || !gw6);
rt = (rtnl_route*) nl_cache_get_next(OBJ_CAST(rt))) {
if (rtnl_route_get_table(rt) != RT_TABLE_MAIN) // we want only main RTT
continue;
nl_addr *pfx = rtnl_route_get_dst(rt);
if (nl_addr_get_len(pfx)) // default route has len = 0
continue;
if (!rtnl_route_get_nnexthops(rt)) // at least one nh is required
continue;
rtnl_nexthop *nh = rtnl_route_nexthop_n(rt, 0);
if (rtnl_route_nh_get_ifindex(nh) != ifIndex) // ignore gw on other links
continue;
if (!gw4 && rtnl_route_get_family(rt) == AF_INET) {
gw4 = qFromBigEndian<quint32>(
nl_addr_get_binary_addr(rtnl_route_nh_get_gateway(nh)));
}
else if (!gw6 && rtnl_route_get_family(rt) == AF_INET6) {
gw6 = UInt128((quint8*)
nl_addr_get_binary_addr(rtnl_route_nh_get_gateway(nh)));
}
}
//
// Find self IP
//
if (!addressCache_) {
qWarning("rtnetlink address cache empty for %s", name());
return;
}
rtnl_addr *l3addr = (rtnl_addr*) nl_cache_get_first(addressCache_);
while (l3addr) {
if (rtnl_addr_get_ifindex(l3addr) == ifIndex) {
if (rtnl_addr_get_family(l3addr) == AF_INET) {
Ip4Config ip;
ip.address = qFromBigEndian<quint32>(
nl_addr_get_binary_addr(
rtnl_addr_get_local(l3addr)));
ip.prefixLength = rtnl_addr_get_prefixlen(l3addr);
ip.gateway = gw4;
interfaceInfo_->ip4.append(ip);
}
else if (rtnl_addr_get_family(l3addr) == AF_INET6) {
Ip6Config ip;
ip.address = UInt128((quint8*)nl_addr_get_binary_addr(
rtnl_addr_get_local(l3addr)));
ip.prefixLength = rtnl_addr_get_prefixlen(l3addr);
ip.gateway = gw6;
interfaceInfo_->ip6.append(ip);
}
}
l3addr = (rtnl_addr*) nl_cache_get_next((nl_object*)l3addr);
}
}
LinuxPort::StatsMonitor::StatsMonitor()
: QThread()
{
stop_ = false;
setupDone_ = false;
ioctlSocket_ = socket(AF_INET, SOCK_DGRAM, 0);
Q_ASSERT(ioctlSocket_ >= 0);
}
LinuxPort::StatsMonitor::~StatsMonitor()
{
close(ioctlSocket_);
}
void LinuxPort::StatsMonitor::run()
{
if (netlinkStats() < 0)
{
qDebug("netlink stats not available - using /proc stats");
procStats();
}
}
void LinuxPort::StatsMonitor::procStats()
{
PortStats **portStats;
int fd;
QByteArray buf;
int len;
char *p, *end;
int count, index;
const char* fmtopt[] = {
"%llu%llu%llu%llu%llu%llu%u%u%llu%llu%u%u%u%u%u%u\n",
"%llu%llu%llu%llu%llu%llu%n%n%llu%llu%u%u%u%u%u%n\n",
};
const char *fmt;
//
// We first setup stuff before we start polling for stats
//
fd = open("/proc/net/dev", O_RDONLY);
if (fd < 0)
{
qWarning("Unable to open /proc/net/dev - no stats will be available");
return;
}
buf.fill('\0', 8192);
len = read(fd, (void*) buf.data(), buf.size());
if (len < 0)
{
qWarning("initial buffer size is too small. no stats will be available");
return;
}
p = buf.data();
end = p + len;
// Select scanf format
if (strstr(buf, "compressed"))
fmt = fmtopt[0];
else
fmt = fmtopt[1];
// Count number of lines - number of ports is 2 less than number of lines
count = 0;
while (p < end)
{
if (*p == '\n')
count++;
p++;
}
count -= 2;
if (count <= 0)
{
qWarning("no ports in /proc/dev/net - no stats will be available");
return;
}
portStats = (PortStats**) calloc(count, sizeof(PortStats));
Q_ASSERT(portStats != NULL);
//
// Populate the port stats array
//
p = buf.data();
// Skip first two lines
while (*p != '\n')
p++;
p++;
while (*p != '\n')
p++;
p++;
index = 0;
while (p < end)
{
char* q;
// Skip whitespace
while ((p < end) && (*p == ' '))
p++;
q = p;
// Get interface name
while ((q < end) && (*q != ':') && (*q != '\n'))
q++;
if ((q < end) && (*q == ':'))
{
foreach(LinuxPort* port, allPorts_)
{
if (strncmp(port->name(), p, int(q-p)) == 0)
{
portStats[index] = &(port->stats_);
if (setPromisc(port->name()))
port->clearPromisc_ = true;
else
port->isPromisc_ = false;
break;
}
}
}
index++;
// Skip till newline
p = q;
while (*p != '\n')
p++;
p++;
}
Q_ASSERT(index == count);
qDebug("stats for %d ports setup", count);
setupDone_ = true;
//
// We are all set - Let's start polling for stats!
//
while (!stop_)
{
lseek(fd, 0, SEEK_SET);
len = read(fd, (void*) buf.data(), buf.size());
if (len < 0)
{
if (buf.size() > 1*1024*1024)
{
qWarning("buffer size hit limit. no more stats");
return;
}
qDebug("doubling buffer size. curr = %d", buf.size());
buf.resize(buf.size() * 2);
continue;
}
p = buf.data();
end = p + len;
// Skip first two lines
while (*p != '\n')
p++;
p++;
while (*p != '\n')
p++;
p++;
index = 0;
while (p < end)
{
uint dummy;
quint64 rxBytes, rxPkts;
quint64 rxErrors, rxDrops, rxFifo, rxFrame;
quint64 txBytes, txPkts;
// Skip interface name - we assume the number and order of ports
// won't change since we parsed the output before we started polling
while ((p < end) && (*p != ':') && (*p != '\n'))
p++;
if (p >= end)
break;
if (*p == '\n')
{
index++;
continue;
}
p++;
sscanf(p, fmt,
&rxBytes, &rxPkts, &rxErrors, &rxDrops, &rxFifo, &rxFrame,
&dummy, &dummy,
&txBytes, &txPkts, &dummy, &dummy, &dummy, &dummy, &dummy,
&dummy);
if (index < count)
{
AbstractPort::PortStats *stats = portStats[index];
if (stats)
{
// TODO: fix the pps/Bps calc similar to netlink stats
stats->rxPps =
((rxPkts >= stats->rxPkts) ?
rxPkts - stats->rxPkts :
rxPkts + (kMaxValue32 - stats->rxPkts))
/ kRefreshFreq_;
stats->rxBps =
((rxBytes >= stats->rxBytes) ?
rxBytes - stats->rxBytes :
rxBytes + (kMaxValue32 - stats->rxBytes))
/ kRefreshFreq_;
stats->rxPkts = rxPkts;
stats->rxBytes = rxBytes;
stats->txPps =
((txPkts >= stats->txPkts) ?
txPkts - stats->txPkts :
txPkts + (kMaxValue32 - stats->txPkts))
/ kRefreshFreq_;
stats->txBps =
((txBytes >= stats->txBytes) ?
txBytes - stats->txBytes :
txBytes + (kMaxValue32 - stats->txBytes))
/ kRefreshFreq_;
stats->txPkts = txPkts;
stats->txBytes = txBytes;
stats->rxDrops = rxDrops;
stats->rxErrors = rxErrors;
stats->rxFifoErrors = rxFifo;
stats->rxFrameErrors = rxFrame;
}
}
while (*p != '\n')
p++;
p++;
index++;
}
QThread::sleep(kRefreshFreq_);
}
free(portStats);
}
int LinuxPort::StatsMonitor::netlinkStats()
{
QHash<uint, PortStats*> portStats;
QHash<uint, quint64*> portMaxStatsValue;
QHash<uint, OstProto::LinkState*> linkState;
int fd;
struct sockaddr_nl local;
struct sockaddr_nl kernel;
QByteArray buf;
int len, count;
struct {
struct nlmsghdr nlh;
struct rtgenmsg rtg;
} ifListReq;
struct iovec iov;
struct msghdr msg;
struct nlmsghdr *nlm;
bool done = false;
//
// We first setup stuff before we start polling for stats
//
fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd < 0)
{
qWarning("Unable to open netlink socket (errno %d)", errno);
return -1;
}
memset(&local, 0, sizeof(local));
local.nl_family = AF_NETLINK;
if (bind(fd, (struct sockaddr*) &local, sizeof(local)) < 0)
{
qWarning("Unable to bind netlink socket (errno %d)", errno);
return -1;
}
memset(&ifListReq, 0, sizeof(ifListReq));
ifListReq.nlh.nlmsg_len = sizeof(ifListReq);
ifListReq.nlh.nlmsg_type = RTM_GETLINK;
ifListReq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
ifListReq.nlh.nlmsg_pid = 0;
ifListReq.rtg.rtgen_family = AF_PACKET;
buf.fill('\0', 1024);
msg.msg_name = &kernel;
msg.msg_namelen = sizeof(kernel);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
qDebug("nlmsg_flags = %x", ifListReq.nlh.nlmsg_flags);
if (send(fd, (void*)&ifListReq, sizeof(ifListReq), 0) < 0)
{
qWarning("Unable to send GETLINK request (errno %d)", errno);
return -1;
}
count = 0;
_retry:
// Find required size of buffer and resize accordingly
while (1)
{
iov.iov_base = buf.data();
iov.iov_len = buf.size();
msg.msg_flags = 0;
// Peek at reply to check buffer size required
len = recvmsg(fd, &msg, MSG_PEEK|MSG_TRUNC);
if (len < 0)
{
if (errno == EINTR || errno == EAGAIN)
continue;
qWarning("netlink recv error %d", errno);
return -1;
}
else if (len == 0)
{
qWarning("netlink closed the socket on my face!");
return -1;
}
else
{
if (msg.msg_flags & MSG_TRUNC)
{
if (len == buf.size()) // Older Kernel returns truncated size
{
qDebug("netlink buffer size %d not enough", buf.size());
qDebug("retrying with double the size");
// Double the size and retry
buf.resize(buf.size()*2);
continue;
}
else // Newer Kernel returns actual size required
{
qDebug("netlink required buffer size = %d", len);
buf.resize(len);
continue;
}
}
else
qDebug("buffer size %d enough for netlink", buf.size());
break;
}
}
msg.msg_flags = 0;
// Actually receive the reply now
len = recvmsg(fd, &msg, 0);
if (len < 0)
{
if (errno == EINTR || errno == EAGAIN)
goto _retry;
qWarning("netlink recv error %d", errno);
return -1;
}
else if (len == 0)
{
qWarning("netlink socket closed unexpectedly");
return -1;
}
//
// Populate the port stats hash table
//
nlm = (struct nlmsghdr*) buf.data();
while (NLMSG_OK(nlm, (uint)len))
{
struct ifinfomsg *ifi;
struct rtattr *rta;
int rtaLen;
char ifname[64] = "";
if (nlm->nlmsg_type == NLMSG_DONE)
{
done = true;
break;
}
if (nlm->nlmsg_type == NLMSG_ERROR)
{
struct nlmsgerr *err = (struct nlmsgerr*) NLMSG_DATA(nlm);
qDebug("RTNETLINK error %d", err->error);
done = true;
break;
}
Q_ASSERT(nlm->nlmsg_type == RTM_NEWLINK);
ifi = (struct ifinfomsg*) NLMSG_DATA(nlm);
rta = IFLA_RTA(ifi);
rtaLen = len - NLMSG_LENGTH(sizeof(*ifi));
while (RTA_OK(rta, rtaLen))
{
if (rta->rta_type == IFLA_IFNAME)
{
strncpy(ifname, (char*)RTA_DATA(rta), RTA_PAYLOAD(rta));
ifname[RTA_PAYLOAD(rta)] = 0;
break;
}
rta = RTA_NEXT(rta, rtaLen);
}
qDebug("if: %s(%d)", ifname, ifi->ifi_index);
foreach(LinuxPort* port, allPorts_)
{
if (strcmp(port->name(), ifname) == 0)
{
portStats[uint(ifi->ifi_index)] = &(port->stats_);
portMaxStatsValue[uint(ifi->ifi_index)] =
&(port->maxStatsValue_);
linkState[uint(ifi->ifi_index)] = &(port->linkState_);
if (setPromisc(port->name()))
port->clearPromisc_ = true;
else
port->isPromisc_ = false;
count++;
break;
}
}
nlm = NLMSG_NEXT(nlm, len);
}
if (!done)
goto _retry;
qDebug("port count = %d\n", count);
if (count <= 0)
{
qWarning("no ports in RTNETLINK GET_LINK - no stats will be available");
return - 1;
}
qDebug("stats for %d ports setup", count);
setupDone_ = true;
//
// We are all set - Let's start polling for stats!
//
while (!stop_)
{
if (send(fd, (void*)&ifListReq, sizeof(ifListReq), 0) < 0)
{
qWarning("Unable to send GETLINK request (errno %d)", errno);
goto _try_later;
}
done = false;
_retry_recv:
msg.msg_flags = 0;
len = recvmsg(fd, &msg, 0);
if (len < 0)
{
if (errno == EINTR || errno == EAGAIN)
goto _retry_recv;
qWarning("netlink recv error %d", errno);
break;
}
else if (len == 0)
{
qWarning("netlink socket closed unexpectedly");
break;
}
nlm = (struct nlmsghdr*) buf.data();
while (NLMSG_OK(nlm, (uint)len))
{
struct ifinfomsg *ifi;
struct rtattr *rta;
int rtaLen;
if (nlm->nlmsg_type == NLMSG_DONE)
{
done = true;
break;
}
if (nlm->nlmsg_type == NLMSG_ERROR)
{
struct nlmsgerr *err = (struct nlmsgerr*) NLMSG_DATA(nlm);
qDebug("RTNETLINK error: %s", strerror(-err->error));
done = true;
break;
}
Q_ASSERT(nlm->nlmsg_type == RTM_NEWLINK);
ifi = (struct ifinfomsg*) NLMSG_DATA(nlm);
rta = IFLA_RTA(ifi);
rtaLen = len - NLMSG_LENGTH(sizeof(*ifi));
while (RTA_OK(rta, rtaLen))
{
if (rta->rta_type == X_IFLA_STATS)
{
x_rtnl_link_stats *rtnlStats =
(x_rtnl_link_stats*) RTA_DATA(rta);
AbstractPort::PortStats *stats = portStats[ifi->ifi_index];
quint64 *maxStatsValue = portMaxStatsValue[ifi->ifi_index];
OstProto::LinkState *state = linkState[ifi->ifi_index];
if (!stats)
break;
if (rtnlStats->rx_packets >= stats->rxPkts) {
stats->rxPps = (rtnlStats->rx_packets - stats->rxPkts)
/ kRefreshFreq_;
}
else {
if (*maxStatsValue == 0) {
*maxStatsValue = stats->rxPkts > kMaxValue32 ?
kMaxValue64 : kMaxValue32;
}
stats->rxPps = ((*maxStatsValue - stats->rxPkts)
+ rtnlStats->rx_packets)
/ kRefreshFreq_;
}
if (rtnlStats->rx_bytes >= stats->rxBytes) {
stats->rxBps = (rtnlStats->rx_bytes - stats->rxBytes)
/ kRefreshFreq_;
}
else {
if (*maxStatsValue == 0) {
*maxStatsValue = stats->rxBytes > kMaxValue32 ?
kMaxValue64 : kMaxValue32;
}
stats->rxBps = ((*maxStatsValue - stats->rxBytes)
+ rtnlStats->rx_bytes)
/ kRefreshFreq_;
}
stats->rxPkts = rtnlStats->rx_packets;
stats->rxBytes = rtnlStats->rx_bytes;
if (rtnlStats->tx_packets >= stats->txPkts) {
stats->txPps = (rtnlStats->tx_packets - stats->txPkts)
/ kRefreshFreq_;
}
else {
if (*maxStatsValue == 0) {
*maxStatsValue = stats->txPkts > kMaxValue32 ?
kMaxValue64 : kMaxValue32;
}
stats->txPps = ((*maxStatsValue - stats->txPkts)
+ rtnlStats->tx_packets)
/ kRefreshFreq_;
}
if (rtnlStats->tx_bytes >= stats->txBytes) {
stats->txBps = (rtnlStats->tx_bytes - stats->txBytes)
/ kRefreshFreq_;
}
else {
if (*maxStatsValue == 0) {
*maxStatsValue = stats->txBytes > kMaxValue32 ?
kMaxValue64 : kMaxValue32;
}
stats->txBps = ((*maxStatsValue - stats->txBytes)
+ rtnlStats->tx_bytes)
/ kRefreshFreq_;
}
stats->txPkts = rtnlStats->tx_packets;
stats->txBytes = rtnlStats->tx_bytes;
// TODO: export detailed error stats
stats->rxDrops = rtnlStats->rx_dropped
+ rtnlStats->rx_missed_errors;
stats->rxErrors = rtnlStats->rx_errors;
stats->rxFifoErrors = rtnlStats->rx_fifo_errors;
stats->rxFrameErrors = rtnlStats->rx_crc_errors
+ rtnlStats->rx_length_errors
+ rtnlStats->rx_over_errors
+ rtnlStats->rx_frame_errors;
Q_ASSERT(state);
*state = ifi->ifi_flags & IFF_RUNNING ?
OstProto::LinkStateUp : OstProto::LinkStateDown;
break;
}
rta = RTA_NEXT(rta, rtaLen);
}
nlm = NLMSG_NEXT(nlm, len);
}
if (!done)
goto _retry_recv;
_try_later:
QThread::sleep(kRefreshFreq_);
}
portStats.clear();
linkState.clear();
return 0;
}
int LinuxPort::StatsMonitor::setPromisc(const char * portName)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, portName, sizeof(ifr.ifr_name));
if (ioctl(ioctlSocket_, SIOCGIFFLAGS, &ifr) != -1)
{
if ((ifr.ifr_flags & IFF_PROMISC) == 0)
{
ifr.ifr_flags |= IFF_PROMISC;
if (ioctl(ioctlSocket_, SIOCSIFFLAGS, &ifr) != -1)
{
return 1;
}
else
{
qDebug("%s: failed to set promisc; "
"SIOCSIFFLAGS failed (%s)",
portName, strerror(errno));
}
}
}
else
{
qDebug("%s: failed to set promisc; SIOCGIFFLAGS failed (%s)",
portName, strerror(errno));
}
return 0;
}
void LinuxPort::StatsMonitor::stop()
{
stop_ = true;
}
bool LinuxPort::StatsMonitor::waitForSetupFinished(int msecs)
{
QTime t;
t.start();
while (!setupDone_)
{
if (t.elapsed() > msecs)
return false;
QThread::msleep(10);
}
return true;
}
#endif