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Kernel/LibC: Implement getsockname for ipv4 sockets

This commit is contained in:
Bananymous 2024-06-17 20:54:45 +03:00
parent 511fc870a1
commit cad55a4da5
11 changed files with 64 additions and 1 deletions
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2
kernel/include/kernel/FS/Inode.h
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@ -105,6 +105,7 @@ namespace Kernel
BAN::ErrorOr<void> listen(int backlog);
BAN::ErrorOr<size_t> sendto(BAN::ConstByteSpan message, const sockaddr* address, socklen_t address_len);
BAN::ErrorOr<size_t> recvfrom(BAN::ByteSpan buffer, sockaddr* address, socklen_t* address_len);
BAN::ErrorOr<void> getsockname(sockaddr* address, socklen_t* address_len);
// General API
BAN::ErrorOr<size_t> read(off_t, BAN::ByteSpan buffer);
@ -140,6 +141,7 @@ namespace Kernel
virtual BAN::ErrorOr<void> bind_impl(const sockaddr*, socklen_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<size_t> sendto_impl(BAN::ConstByteSpan, const sockaddr*, socklen_t) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<size_t> recvfrom_impl(BAN::ByteSpan, sockaddr*, socklen_t*) { return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<void> getsockname_impl(sockaddr*, socklen_t*) { return BAN::Error::from_errno(ENOTSUP); }
// General API
virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) { return BAN::Error::from_errno(ENOTSUP); }

1
kernel/include/kernel/Networking/IPv4Layer.h
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@ -47,6 +47,7 @@ namespace Kernel
virtual void unbind_socket(BAN::RefPtr<NetworkSocket>, uint16_t port) override;
virtual BAN::ErrorOr<void> bind_socket_to_unused(BAN::RefPtr<NetworkSocket>, const sockaddr* send_address, socklen_t send_address_len) override;
virtual BAN::ErrorOr<void> bind_socket_to_address(BAN::RefPtr<NetworkSocket>, const sockaddr* address, socklen_t address_len) override;
virtual BAN::ErrorOr<void> get_socket_address(BAN::RefPtr<NetworkSocket>, sockaddr* address, socklen_t* address_len) override;
virtual BAN::ErrorOr<size_t> sendto(NetworkSocket&, BAN::ConstByteSpan, const sockaddr*, socklen_t) override;

1
kernel/include/kernel/Networking/NetworkLayer.h
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@ -25,6 +25,7 @@ namespace Kernel
virtual void unbind_socket(BAN::RefPtr<NetworkSocket>, uint16_t port) = 0;
virtual BAN::ErrorOr<void> bind_socket_to_unused(BAN::RefPtr<NetworkSocket>, const sockaddr* send_address, socklen_t send_address_len) = 0;
virtual BAN::ErrorOr<void> bind_socket_to_address(BAN::RefPtr<NetworkSocket>, const sockaddr* address, socklen_t address_len) = 0;
virtual BAN::ErrorOr<void> get_socket_address(BAN::RefPtr<NetworkSocket>, sockaddr* address, socklen_t* address_len) = 0;
virtual BAN::ErrorOr<size_t> sendto(NetworkSocket&, BAN::ConstByteSpan, const sockaddr*, socklen_t) = 0;

1
kernel/include/kernel/Networking/NetworkSocket.h
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@ -42,6 +42,7 @@ namespace Kernel
NetworkSocket(NetworkLayer&, ino_t, const TmpInodeInfo&);
virtual BAN::ErrorOr<long> ioctl_impl(int request, void* arg) override;
virtual BAN::ErrorOr<void> getsockname_impl(sockaddr*, socklen_t*) override;
protected:
NetworkLayer& m_network_layer;

2
kernel/include/kernel/Process.h
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@ -119,6 +119,8 @@ namespace Kernel
BAN::ErrorOr<long> sys_chown(const char*, uid_t, gid_t);
BAN::ErrorOr<long> sys_socket(int domain, int type, int protocol);
BAN::ErrorOr<long> sys_getsockname(int socket, sockaddr* address, socklen_t* address_len);
BAN::ErrorOr<long> sys_accept(int socket, sockaddr* address, socklen_t* address_len);
BAN::ErrorOr<long> sys_bind(int socket, const sockaddr* address, socklen_t address_len);
BAN::ErrorOr<long> sys_connect(int socket, const sockaddr* address, socklen_t address_len);

8
kernel/kernel/FS/Inode.cpp
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@ -164,6 +164,14 @@ namespace Kernel
return recvfrom_impl(buffer, address, address_len);
};
BAN::ErrorOr<void> Inode::getsockname(sockaddr* address, socklen_t* address_len)
{
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return getsockname_impl(address, address_len);
}
BAN::ErrorOr<size_t> Inode::read(off_t offset, BAN::ByteSpan buffer)
{
LockGuard _(m_mutex);

22
kernel/kernel/Networking/IPv4Layer.cpp
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@ -139,6 +139,28 @@ namespace Kernel
return {};
}
BAN::ErrorOr<void> IPv4Layer::get_socket_address(BAN::RefPtr<NetworkSocket> socket, sockaddr* address, socklen_t* address_len)
{
if (*address_len < (socklen_t)sizeof(sockaddr_in))
return BAN::Error::from_errno(ENOBUFS);
sockaddr_in* in_addr = reinterpret_cast<sockaddr_in*>(address);
SpinLockGuard _(m_bound_socket_lock);
for (auto& [bound_port, bound_socket] : m_bound_sockets)
{
if (socket != bound_socket.lock())
continue;
// FIXME: sockets should have bound address
in_addr->sin_family = AF_INET;
in_addr->sin_port = bound_port;
in_addr->sin_addr.s_addr = INADDR_ANY;
return {};
}
return {};
}
BAN::ErrorOr<size_t> IPv4Layer::sendto(NetworkSocket& socket, BAN::ConstByteSpan buffer, const sockaddr* address, socklen_t address_len)
{
if (address->sa_family != AF_INET)

6
kernel/kernel/Networking/NetworkSocket.cpp
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@ -100,4 +100,10 @@ namespace Kernel
}
}
BAN::ErrorOr<void> NetworkSocket::getsockname_impl(sockaddr* address, socklen_t* address_len)
{
TRY(m_network_layer.get_socket_address(this, address, address_len));
return {};
}
}

14
kernel/kernel/Process.cpp
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@ -911,6 +911,20 @@ namespace Kernel
return TRY(m_open_file_descriptors.socket(domain, type, protocol));
}
BAN::ErrorOr<long> Process::sys_getsockname(int socket, sockaddr* address, socklen_t* address_len)
{
LockGuard _(m_process_lock);
TRY(validate_pointer_access(address_len, sizeof(address_len)));
TRY(validate_pointer_access(address, *address_len));
auto inode = TRY(m_open_file_descriptors.inode_of(socket));
if (!inode->mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
TRY(inode->getsockname(address, address_len));
return 0;
}
BAN::ErrorOr<long> Process::sys_accept(int socket, sockaddr* address, socklen_t* address_len)
{
if (address && !address_len)

1
libc/include/sys/syscall.h
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@ -78,6 +78,7 @@ __BEGIN_DECLS
O(SYS_SMO_DELETE, smo_delete) \
O(SYS_SMO_MAP, smo_map) \
O(SYS_ISATTY, isatty) \
O(SYS_GETSOCKNAME, getsockname) \
enum Syscall
{

5
libc/sys/socket.cpp
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@ -62,3 +62,8 @@ int socket(int domain, int type, int protocol)
{
return syscall(SYS_SOCKET, domain, type, protocol);
}
int getsockname(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len)
{
return syscall(SYS_GETSOCKNAME, socket, address, address_len);
}