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fix null termination of description and friendly_name in ip_interface on linux

This commit is contained in:
arvidn 2020-01-04 22:49:16 +01:00 committed by Arvid Norberg
parent 3caae922aa
commit 3569b8885e
2 changed files with 11 additions and 22 deletions
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8
include/libtorrent/enum_net.hpp
View File

@ -60,9 +60,9 @@ namespace libtorrent {
{
address interface_address;
address netmask;
char name[64];
char friendly_name[128];
char description[128];
char name[64]{};
char friendly_name[128]{};
char description[128]{};
// an interface is preferred if its address is
// not tentative/duplicate/deprecated
bool preferred = true;
@ -73,7 +73,7 @@ namespace libtorrent {
address destination;
address netmask;
address gateway;
char name[64];
char name[64]{};
int mtu;
};

25
src/enum_net.cpp
View File

@ -423,7 +423,6 @@ namespace {
static_assert(sizeof(ip_info->name) >= IF_NAMESIZE, "not enough space in ip_interface::name");
if_indextoname(addr_msg->ifa_index, ip_info->name);
return true;
}
#endif // TORRENT_USE_NETLINK
@ -480,9 +479,7 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
}
std::strncpy(rv.name, ifa->ifa_name, sizeof(rv.name));
rv.name[sizeof(rv.name) - 1] = 0;
rv.friendly_name[0] = 0;
rv.description[0] = 0;
rv.name[sizeof(rv.name) - 1] = '\0';
// determine address
rv.interface_address = sockaddr_to_address(ifa->ifa_addr);
@ -658,9 +655,7 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
ip_interface iface;
iface.interface_address = sockaddr_to_address(&item.ifr_addr);
std::strncpy(iface.name, item.ifr_name, sizeof(iface.name));
iface.name[sizeof(iface.name) - 1] = 0;
iface.friendly_name[0] = 0;
iface.description[0] = 0;
iface.name[sizeof(iface.name) - 1] = '\0';
ifreq req = {};
std::strncpy(req.ifr_name, item.ifr_name, IF_NAMESIZE - 1);
@ -725,11 +720,11 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
{
ip_interface r;
std::strncpy(r.name, adapter->AdapterName, sizeof(r.name));
r.name[sizeof(r.name) - 1] = 0;
r.name[sizeof(r.name) - 1] = '\0';
wcstombs(r.friendly_name, adapter->FriendlyName, sizeof(r.friendly_name));
r.friendly_name[sizeof(r.friendly_name) - 1] = 0;
r.friendly_name[sizeof(r.friendly_name) - 1] = '\0';
wcstombs(r.description, adapter->Description, sizeof(r.description));
r.description[sizeof(r.description) - 1] = 0;
r.description[sizeof(r.description) - 1] = '\0';
for (IP_ADAPTER_UNICAST_ADDRESS* unicast = adapter->FirstUnicastAddress;
unicast; unicast = unicast->Next)
{
@ -766,16 +761,13 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
int n = size / sizeof(INTERFACE_INFO);
ip_interface iface;
for (int i = 0; i < n; ++i)
{
ip_interface iface;
iface.interface_address = sockaddr_to_address(&buffer[i].iiAddress.Address);
if (iface.interface_address == address_v4::any()) continue;
iface.netmask = sockaddr_to_address(&buffer[i].iiNetmask.Address
, iface.interface_address.is_v4() ? AF_INET : AF_INET6);
iface.name[0] = 0;
iface.friendly_name[0] = 0;
iface.description[0] = 0;
ret.push_back(iface);
}
@ -791,13 +783,10 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
udp::resolver r(ios);
udp::resolver::iterator i = r.resolve(udp::resolver::query(boost::asio::ip::host_name(ec), "0"), ec);
if (ec) return ret;
ip_interface iface;
for (;i != udp::resolver::iterator(); ++i)
{
ip_interface iface;
iface.interface_address = i->endpoint().address();
iface.name[0] = 0;
iface.friendly_name[0] = 0;
iface.description[0] = 0;
if (iface.interface_address.is_v4())
iface.netmask = address_v4::netmask(iface.interface_address.to_v4());
ret.push_back(iface);