RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 14:47:44 +00:00
Code Issues Activity Actions

Kernel: Plumb packet receive timestamp from NetworkAdapter to Socket::recvfrom

Browse source 
Since the receiving socket isn't yet known at packet receive time,
keep timestamps for all packets.

This is useful for keeping statistics about in-kernel queue latencies
in the future, and it can be used to implement SO_TIMESTAMP.
This commit is contained in:
Nico Weber 2020-09-16 12:25:06 -04:00 • committed by Andreas Kling
parent b36a2d6686
commit 416d470d07
10 changed files with 52 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Kernel/Net/NetworkAdapter.h
View file

@ -67,7 +67,7 @@ public:
int send_ipv4(const MACAddress&, const IPv4Address&, IPv4Protocol, const UserOrKernelBuffer& payload, size_t payload_size, u8 ttl);
int send_ipv4_fragmented(const MACAddress&, const IPv4Address&, IPv4Protocol, const UserOrKernelBuffer& payload, size_t payload_size, u8 ttl);
size_t dequeue_packet(u8* buffer, size_t buffer_size);
size_t dequeue_packet(u8* buffer, size_t buffer_size, timeval& packet_timestamp);
bool has_queued_packets() const { return !m_packet_queue.is_empty(); }
@ -93,7 +93,13 @@ private:
IPv4Address m_ipv4_address;
IPv4Address m_ipv4_netmask;
IPv4Address m_ipv4_gateway;
SinglyLinkedList<KBuffer> m_packet_queue;
struct PacketWithTimestamp {
KBuffer packet;
timeval timestamp;
};
SinglyLinkedList<PacketWithTimestamp> m_packet_queue;
SinglyLinkedList<KBuffer> m_unused_packet_buffers;
size_t m_unused_packet_buffers_count { 0 };
String m_name;