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Kernel: Add getsockopt(SO_PEERCRED) for local sockets

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This sockopt gives you a struct with the PID, UID and GID of a socket's
peer process.
This commit is contained in:
Andreas Kling 2019-12-06 18:38:36 +01:00
parent 6e6e0b9de8
commit 23e802518d
10 changed files with 72 additions and 12 deletions
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32
Kernel/Net/LocalSocket.cpp
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@ -33,6 +33,7 @@ LocalSocket::LocalSocket(int type)
{
LOCKER(all_sockets().lock());
all_sockets().resource().append(this);
#ifdef DEBUG_LOCAL_SOCKET
kprintf("%s(%u) LocalSocket{%p} created with type=%u\n", current->process().name().characters(), current->pid(), this, type);
#endif
@ -302,3 +303,34 @@ String LocalSocket::absolute_path(const FileDescription& description) const
return builder.to_string();
}
KResult LocalSocket::getsockopt(FileDescription& description, int level, int option, void* value, socklen_t* value_size)
{
if (level != SOL_SOCKET)
return Socket::getsockopt(description, level, option, value, value_size);
switch (option) {
case SO_PEERCRED: {
if (*value_size < sizeof(ucred))
return KResult(-EINVAL);
auto& creds = *(ucred*)value;
switch (role(description)) {
case Role::Accepted:
creds = m_origin;
*value_size = sizeof(ucred);
return KSuccess;
case Role::Connected:
creds = m_acceptor;
*value_size = sizeof(ucred);
return KSuccess;
case Role::Connecting:
return KResult(-ENOTCONN);
default:
return KResult(-EINVAL);
}
break;
}
default:
return Socket::getsockopt(description, level, option, value, value_size);
}
}