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Fix multicastMembershipHelper to not assume addresses are IPv4

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Make it iterate the addresses available looking for an IPv4 address,
when that's what it needs, instead of just assuming the first entry in
the list (when non-empty) is IPv4.

Based on a suggestion by Dmitry Pankratov.

Task-number: QTBUG-27641
Change-Id: I1920f68ade44a996ea5c2ed691a87ff3e686f35a
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Edward Welbourne 2017-02-20 11:16:12 +01:00
parent 46730ca610
commit 4c367833b4
2 changed files with 20 additions and 8 deletions
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14
src/network/socket/qnativesocketengine_unix.cpp
View File

@ -679,10 +679,16 @@ static bool multicastMembershipHelper(QNativeSocketEnginePrivate *d,
if (interface.isValid()) {
const QList<QNetworkAddressEntry> addressEntries = interface.addressEntries();
if (!addressEntries.isEmpty()) {
QHostAddress firstIP = addressEntries.first().ip();
mreq4.imr_interface.s_addr = htonl(firstIP.toIPv4Address());
} else {
bool found = false;
for (const QNetworkAddressEntry &entry : addressEntries) {
const QHostAddress ip = entry.ip();
if (ip.protocol() == QAbstractSocket::IPv4Protocol) {
mreq4.imr_interface.s_addr = htonl(ip.toIPv4Address());
found = true;
break;
}
}
if (!found) {
d->setError(QAbstractSocket::NetworkError,
QNativeSocketEnginePrivate::NetworkUnreachableErrorString);
return false;

14
src/network/socket/qnativesocketengine_win.cpp
View File

@ -959,10 +959,16 @@ static bool multicastMembershipHelper(QNativeSocketEnginePrivate *d,
if (iface.isValid()) {
const QList<QNetworkAddressEntry> addressEntries = iface.addressEntries();
if (!addressEntries.isEmpty()) {
QHostAddress firstIP = addressEntries.first().ip();
mreq4.imr_interface.s_addr = htonl(firstIP.toIPv4Address());
} else {
bool found = false;
for (const QNetworkAddressEntry &entry : addressEntries) {
const QHostAddress ip = entry.ip();
if (ip.protocol() == QAbstractSocket::IPv4Protocol) {
mreq4.imr_interface.s_addr = htonl(ip.toIPv4Address());
found = true;
break;
}
}
if (!found) {
d->setError(QAbstractSocket::NetworkError,
QNativeSocketEnginePrivate::NetworkUnreachableErrorString);
return false;