diff options
| author | Sepalani <sepalani@hotmail.fr> | 2022-07-10 20:34:15 +0400 |
|---|---|---|
| committer | Sepalani <sepalani@hotmail.fr> | 2022-07-10 20:56:07 +0400 |
| commit | b950d038b9074fb7cba61989f3214ecbe3163355 (patch) | |
| tree | 75c279d463c4bad085b86d757c9f6bd2c0fef6b8 /Source/Core/Common/Network.cpp | |
| parent | 5fdf255a2da7736a791a8a35f9652ea5ac14fe06 (diff) | |
Common/Network: Update IP checksum since total_len might have changed
Diffstat (limited to 'Source/Core/Common/Network.cpp')
| -rw-r--r-- | Source/Core/Common/Network.cpp | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/Source/Core/Common/Network.cpp b/Source/Core/Common/Network.cpp index f35308a5ab..2d532690c1 100644 --- a/Source/Core/Common/Network.cpp +++ b/Source/Core/Common/Network.cpp @@ -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( |