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fix(NetworkInterface): Unterminated string possible in NetworkInterfaceImpl::setPhyParams() #3301

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This commit is contained in:
Alex Fabijanic
2021-06-07 06:41:42 +02:00
parent 0a3c76ffd0
commit 9155121866
1 changed files with 6 additions and 2 deletions
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8
Net/src/NetworkInterface.cpp
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@@ -243,8 +243,12 @@ NetworkInterfaceImpl::NetworkInterfaceImpl(const std::string& name,
void NetworkInterfaceImpl::setPhyParams() void NetworkInterfaceImpl::setPhyParams()
{ {
#if !defined(POCO_OS_FAMILY_WINDOWS) && !defined(POCO_VXWORKS) #if !defined(POCO_OS_FAMILY_WINDOWS) && !defined(POCO_VXWORKS)
struct ifreq ifr; struct ifreq ifr{};
std::strncpy(ifr.ifr_name, _name.c_str(), IFNAMSIZ); std::size_t szFrom = _name.size();
std::size_t szTo = IFNAMSIZ - 1;
std::size_t sz = szFrom <= szTo ? szFrom : szTo;
std::strncpy(ifr.ifr_name, _name.c_str(), sz);
DatagramSocket ds(SocketAddress::IPv4); DatagramSocket ds(SocketAddress::IPv4);
ds.impl()->ioctl(SIOCGIFFLAGS, &ifr); ds.impl()->ioctl(SIOCGIFFLAGS, &ifr);