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Common/Network: Update IP checksum since total_len might have changed

This commit is contained in:
Sepalani 2022-07-10 20:34:15 +04:00
parent 5fdf255a2d
commit b950d038b9
1 changed files with 14 additions and 2 deletions
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16
Source/Core/Common/Network.cpp
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@ -377,9 +377,15 @@ std::vector<u8> TCPPacket::Build() const
(static_cast<u16>((tcp_options.size() + TCPHeader::SIZE) & 0x3c) << 10);
Common::BitCastPtr<u16>(tcp_ptr + offsetof(TCPHeader, properties)) = htons(tcp_properties);
const u16 ip_total_len = static_cast<u16>(IPv4Header::SIZE + ipv4_options.size() + tcp_length);
const u16 ip_header_size = static_cast<u16>(IPv4Header::SIZE + ipv4_options.size());
const u16 ip_total_len = ip_header_size + tcp_length;
Common::BitCastPtr<u16>(ip_ptr + offsetof(IPv4Header, total_len)) = htons(ip_total_len);
auto ip_checksum_bitcast_ptr =
Common::BitCastPtr<u16>(ip_ptr + offsetof(IPv4Header, header_checksum));
ip_checksum_bitcast_ptr = u16(0);
ip_checksum_bitcast_ptr = htons(Common::ComputeNetworkChecksum(ip_ptr, ip_header_size));
auto checksum_bitcast_ptr = Common::BitCastPtr<u16>(tcp_ptr + offsetof(TCPHeader, checksum));
checksum_bitcast_ptr = u16(0);
checksum_bitcast_ptr = ComputeTCPNetworkChecksum(
@ -421,9 +427,15 @@ std::vector<u8> UDPPacket::Build() const
const u16 udp_length = static_cast<u16>(UDPHeader::SIZE + data.size());
Common::BitCastPtr<u16>(udp_ptr + offsetof(UDPHeader, length)) = htons(udp_length);
const u16 ip_total_len = static_cast<u16>(IPv4Header::SIZE + ipv4_options.size() + udp_length);
const u16 ip_header_size = static_cast<u16>(IPv4Header::SIZE + ipv4_options.size());
const u16 ip_total_len = ip_header_size + udp_length;
Common::BitCastPtr<u16>(ip_ptr + offsetof(IPv4Header, total_len)) = htons(ip_total_len);
auto ip_checksum_bitcast_ptr =
Common::BitCastPtr<u16>(ip_ptr + offsetof(IPv4Header, header_checksum));
ip_checksum_bitcast_ptr = u16(0);
ip_checksum_bitcast_ptr = htons(Common::ComputeNetworkChecksum(ip_ptr, ip_header_size));
auto checksum_bitcast_ptr = Common::BitCastPtr<u16>(udp_ptr + offsetof(UDPHeader, checksum));
checksum_bitcast_ptr = u16(0);
checksum_bitcast_ptr = ComputeTCPNetworkChecksum(