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Everywhere: Switch from (void) to [[maybe_unused]] (#4473)
Problem: - `(void)` simply casts the expression to void. This is understood to indicate that it is ignored, but this is really a compiler trick to get the compiler to not generate a warning. Solution: - Use the `[[maybe_unused]]` attribute to indicate the value is unused. Note: - Functions taking a `(void)` argument list have also been changed to `()` because this is not needed and shows up in the same grep command.
This commit is contained in:
Lenny Maiorani
GitHub
parent
4421d98e30
commit
765936ebae
103 changed files with 219 additions and 362 deletions
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@ -374,6 +374,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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socket->receive_tcp_packet(tcp_packet, ipv4_packet.payload_size());
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[[maybe_unused]] int unused_rc {};
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switch (socket->state()) {
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case TCPSocket::State::Closed:
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klog() << "handle_tcp: unexpected flags in Closed state";
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@ -381,7 +382,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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case TCPSocket::State::TimeWait:
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klog() << "handle_tcp: unexpected flags in TimeWait state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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case TCPSocket::State::Listen:
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@ -403,46 +404,46 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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#endif
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client->set_sequence_number(1000);
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client->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
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(void)client->send_tcp_packet(TCPFlags::SYN | TCPFlags::ACK);
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[[maybe_unused]] auto rc2 = client->send_tcp_packet(TCPFlags::SYN | TCPFlags::ACK);
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client->set_state(TCPSocket::State::SynReceived);
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return;
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}
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default:
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klog() << "handle_tcp: unexpected flags in Listen state";
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// (void)socket->send_tcp_packet(TCPFlags::RST);
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// socket->send_tcp_packet(TCPFlags::RST);
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return;
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}
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case TCPSocket::State::SynSent:
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switch (tcp_packet.flags()) {
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case TCPFlags::SYN:
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socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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socket->set_state(TCPSocket::State::SynReceived);
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return;
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case TCPFlags::ACK | TCPFlags::SYN:
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socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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socket->set_state(TCPSocket::State::Established);
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socket->set_setup_state(Socket::SetupState::Completed);
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socket->set_connected(true);
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return;
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case TCPFlags::ACK | TCPFlags::FIN:
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socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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socket->set_state(TCPSocket::State::Closed);
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socket->set_error(TCPSocket::Error::FINDuringConnect);
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socket->set_setup_state(Socket::SetupState::Completed);
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return;
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case TCPFlags::ACK | TCPFlags::RST:
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socket->set_ack_number(tcp_packet.sequence_number() + payload_size);
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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socket->set_state(TCPSocket::State::Closed);
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socket->set_error(TCPSocket::Error::RSTDuringConnect);
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socket->set_setup_state(Socket::SetupState::Completed);
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return;
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default:
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klog() << "handle_tcp: unexpected flags in SynSent state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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socket->set_error(TCPSocket::Error::UnexpectedFlagsDuringConnect);
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socket->set_setup_state(Socket::SetupState::Completed);
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@ -457,7 +458,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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case TCPSocket::Direction::Incoming:
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if (!socket->has_originator()) {
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klog() << "handle_tcp: connection doesn't have an originating socket; maybe it went away?";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -473,7 +474,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: got ACK in SynReceived state but direction is invalid (" << TCPSocket::to_string(socket->direction()) << ")";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -481,7 +482,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: unexpected flags in SynReceived state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -489,7 +490,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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switch (tcp_packet.flags()) {
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default:
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klog() << "handle_tcp: unexpected flags in CloseWait state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -501,7 +502,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: unexpected flags in LastAck state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -517,7 +518,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: unexpected flags in FinWait1 state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -532,7 +533,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: unexpected flags in FinWait2 state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -544,7 +545,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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return;
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default:
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klog() << "handle_tcp: unexpected flags in Closing state";
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(void)socket->send_tcp_packet(TCPFlags::RST);
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unused_rc = socket->send_tcp_packet(TCPFlags::RST);
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socket->set_state(TCPSocket::State::Closed);
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return;
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}
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@ -554,7 +555,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp);
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socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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socket->set_state(TCPSocket::State::CloseWait);
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socket->set_connected(false);
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return;
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@ -568,7 +569,7 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const timeval& packet_timestamp)
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if (payload_size) {
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if (socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), KBuffer::copy(&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()), packet_timestamp))
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(void)socket->send_tcp_packet(TCPFlags::ACK);
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unused_rc = socket->send_tcp_packet(TCPFlags::ACK);
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}
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}
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}
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