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sockets: use safe access helpers

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This commit is contained in:
Liam 2023-10-25 12:59:11 -04:00
parent 008d7e8c5f
commit ca75c58f43
2 changed files with 38 additions and 41 deletions
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77
src/core/hle/service/sockets/bsd.cpp
View file

@ -39,6 +39,18 @@ bool IsConnectionBased(Type type) {
}
}
template <typename T>
T GetValue(std::span<const u8> buffer) {
T t{};
std::memcpy(&t, buffer.data(), std::min(sizeof(T), buffer.size()));
return t;
}
template <typename T>
void PutValue(std::span<u8> buffer, const T& t) {
std::memcpy(buffer.data(), &t, std::min(sizeof(T), buffer.size()));
}
} // Anonymous namespace
void BSD::PollWork::Execute(BSD* bsd) {
@ -316,22 +328,12 @@ void BSD::SetSockOpt(HLERequestContext& ctx) {
const s32 fd = rp.Pop<s32>();
const u32 level = rp.Pop<u32>();
const OptName optname = static_cast<OptName>(rp.Pop<u32>());
const auto buffer = ctx.ReadBuffer();
const u8* optval = buffer.empty() ? nullptr : buffer.data();
size_t optlen = buffer.size();
std::array<u64, 2> values;
if ((optname == OptName::SNDTIMEO || optname == OptName::RCVTIMEO) && buffer.size() == 8) {
std::memcpy(values.data(), buffer.data(), sizeof(values));
optlen = sizeof(values);
optval = reinterpret_cast<const u8*>(values.data());
}
const auto optval = ctx.ReadBuffer();
LOG_DEBUG(Service, "called. fd={} level={} optname=0x{:x} optlen={}", fd, level,
static_cast<u32>(optname), optlen);
static_cast<u32>(optname), optval.size());
BuildErrnoResponse(ctx, SetSockOptImpl(fd, level, optname, optlen, optval));
BuildErrnoResponse(ctx, SetSockOptImpl(fd, level, optname, optval));
}
void BSD::Shutdown(HLERequestContext& ctx) {
@ -521,18 +523,19 @@ std::pair<s32, Errno> BSD::SocketImpl(Domain domain, Type type, Protocol protoco
std::pair<s32, Errno> BSD::PollImpl(std::vector<u8>& write_buffer, std::span<const u8> read_buffer,
s32 nfds, s32 timeout) {
if (nfds <= 0) {
// When no entries are provided, -1 is returned with errno zero
return {-1, Errno::SUCCESS};
}
if (read_buffer.size() < nfds * sizeof(PollFD)) {
return {-1, Errno::INVAL};
}
if (write_buffer.size() < nfds * sizeof(PollFD)) {
return {-1, Errno::INVAL};
}
if (nfds == 0) {
// When no entries are provided, -1 is returned with errno zero
return {-1, Errno::SUCCESS};
}
const size_t length = std::min(read_buffer.size(), write_buffer.size());
std::vector<PollFD> fds(nfds);
std::memcpy(fds.data(), read_buffer.data(), length);
std::memcpy(fds.data(), read_buffer.data(), nfds * sizeof(PollFD));
if (timeout >= 0) {
const s64 seconds = timeout / 1000;
@ -580,7 +583,7 @@ std::pair<s32, Errno> BSD::PollImpl(std::vector<u8>& write_buffer, std::span<con
for (size_t i = 0; i < num; ++i) {
fds[i].revents = Translate(host_pollfds[i].revents);
}
std::memcpy(write_buffer.data(), fds.data(), length);
std::memcpy(write_buffer.data(), fds.data(), nfds * sizeof(PollFD));
return Translate(result);
}
@ -608,8 +611,7 @@ std::pair<s32, Errno> BSD::AcceptImpl(s32 fd, std::vector<u8>& write_buffer) {
new_descriptor.is_connection_based = descriptor.is_connection_based;
const SockAddrIn guest_addr_in = Translate(result.sockaddr_in);
const size_t length = std::min(sizeof(guest_addr_in), write_buffer.size());
std::memcpy(write_buffer.data(), &guest_addr_in, length);
PutValue(write_buffer, guest_addr_in);
return {new_fd, Errno::SUCCESS};
}
@ -619,8 +621,7 @@ Errno BSD::BindImpl(s32 fd, std::span<const u8> addr) {
return Errno::BADF;
}
ASSERT(addr.size() == sizeof(SockAddrIn));
SockAddrIn addr_in;
std::memcpy(&addr_in, addr.data(), sizeof(addr_in));
auto addr_in = GetValue<SockAddrIn>(addr);
return Translate(file_descriptors[fd]->socket->Bind(Translate(addr_in)));
}
@ -631,8 +632,7 @@ Errno BSD::ConnectImpl(s32 fd, std::span<const u8> addr) {
}
UNIMPLEMENTED_IF(addr.size() != sizeof(SockAddrIn));
SockAddrIn addr_in;
std::memcpy(&addr_in, addr.data(), sizeof(addr_in));
auto addr_in = GetValue<SockAddrIn>(addr);
return Translate(file_descriptors[fd]->socket->Connect(Translate(addr_in)));
}
@ -650,7 +650,7 @@ Errno BSD::GetPeerNameImpl(s32 fd, std::vector<u8>& write_buffer) {
ASSERT(write_buffer.size() >= sizeof(guest_addrin));
write_buffer.resize(sizeof(guest_addrin));
std::memcpy(write_buffer.data(), &guest_addrin, sizeof(guest_addrin));
PutValue(write_buffer, guest_addrin);
return Translate(bsd_errno);
}
@ -667,7 +667,7 @@ Errno BSD::GetSockNameImpl(s32 fd, std::vector<u8>& write_buffer) {
ASSERT(write_buffer.size() >= sizeof(guest_addrin));
write_buffer.resize(sizeof(guest_addrin));
std::memcpy(write_buffer.data(), &guest_addrin, sizeof(guest_addrin));
PutValue(write_buffer, guest_addrin);
return Translate(bsd_errno);
}
@ -725,7 +725,7 @@ Errno BSD::GetSockOptImpl(s32 fd, u32 level, OptName optname, std::vector<u8>& o
optval.size() == sizeof(Errno), { return Errno::INVAL; },
"Incorrect getsockopt option size");
optval.resize(sizeof(Errno));
memcpy(optval.data(), &translated_pending_err, sizeof(Errno));
PutValue(optval, translated_pending_err);
}
return Translate(getsockopt_err);
}
@ -735,7 +735,7 @@ Errno BSD::GetSockOptImpl(s32 fd, u32 level, OptName optname, std::vector<u8>& o
}
}
Errno BSD::SetSockOptImpl(s32 fd, u32 level, OptName optname, size_t optlen, const void* optval) {
Errno BSD::SetSockOptImpl(s32 fd, u32 level, OptName optname, std::span<const u8> optval) {
if (!IsFileDescriptorValid(fd)) {
return Errno::BADF;
}
@ -748,17 +748,15 @@ Errno BSD::SetSockOptImpl(s32 fd, u32 level, OptName optname, size_t optlen, con
Network::SocketBase* const socket = file_descriptors[fd]->socket.get();
if (optname == OptName::LINGER) {
ASSERT(optlen == sizeof(Linger));
Linger linger;
std::memcpy(&linger, optval, sizeof(linger));
ASSERT(optval.size() == sizeof(Linger));
auto linger = GetValue<Linger>(optval);
ASSERT(linger.onoff == 0 || linger.onoff == 1);
return Translate(socket->SetLinger(linger.onoff != 0, linger.linger));
}
ASSERT(optlen == sizeof(u32));
u32 value;
std::memcpy(&value, optval, sizeof(value));
ASSERT(optval.size() == sizeof(u32));
auto value = GetValue<u32>(optval);
switch (optname) {
case OptName::REUSEADDR:
@ -862,7 +860,7 @@ std::pair<s32, Errno> BSD::RecvFromImpl(s32 fd, u32 flags, std::vector<u8>& mess
} else {
ASSERT(addr.size() == sizeof(SockAddrIn));
const SockAddrIn result = Translate(addr_in);
std::memcpy(addr.data(), &result, sizeof(result));
PutValue(addr, result);
}
}
@ -886,8 +884,7 @@ std::pair<s32, Errno> BSD::SendToImpl(s32 fd, u32 flags, std::span<const u8> mes
Network::SockAddrIn* p_addr_in = nullptr;
if (!addr.empty()) {
ASSERT(addr.size() == sizeof(SockAddrIn));
SockAddrIn guest_addr_in;
std::memcpy(&guest_addr_in, addr.data(), sizeof(guest_addr_in));
auto guest_addr_in = GetValue<SockAddrIn>(addr);
addr_in = Translate(guest_addr_in);
p_addr_in = &addr_in;
}

2
src/core/hle/service/sockets/bsd.h
View file

@ -163,7 +163,7 @@ private:
Errno ListenImpl(s32 fd, s32 backlog);
std::pair<s32, Errno> FcntlImpl(s32 fd, FcntlCmd cmd, s32 arg);
Errno GetSockOptImpl(s32 fd, u32 level, OptName optname, std::vector<u8>& optval);
Errno SetSockOptImpl(s32 fd, u32 level, OptName optname, size_t optlen, const void* optval);
Errno SetSockOptImpl(s32 fd, u32 level, OptName optname, std::span<const u8> optval);
Errno ShutdownImpl(s32 fd, s32 how);
std::pair<s32, Errno> RecvImpl(s32 fd, u32 flags, std::vector<u8>& message);
std::pair<s32, Errno> RecvFromImpl(s32 fd, u32 flags, std::vector<u8>& message,