The Linux Kernel
Development process
Submitting patches
Code of conduct
Maintainer handbook
All development-process docs
Core API
Driver APIs
Subsystems
Core subsystems
Human interfaces
Networking interfaces
Networking
AF_XDP
Bare UDP Tunnelling Module Documentation
batman-adv
SocketCAN - Controller Area Network
The UCAN Protocol
Hardware Device Drivers
Networking Diagnostics
Distributed Switch Architecture
Linux Devlink Documentation
CAIF
Netlink interface for ethtool
IEEE 802.15.4 Developer’s Guide
ISO 15765-2 (ISO-TP)
J1939 Documentation
Linux Networking and Network Devices APIs
MSG_ZEROCOPY
FAILOVER
Net DIM - Generic Network Dynamic Interrupt Moderation
NET_FAILOVER
Page Pool API
PHY Abstraction Layer
phylink
IP-Aliasing
Ethernet Bridging
SNMP counter
Checksum Offloads
Segmentation Offloads
Scaling in the Linux Networking Stack
Kernel TLS
Kernel TLS offload
In-Kernel TLS Handshake
Linux NFC subsystem
Netdev private dataroom for 6lowpan interfaces
6pack Protocol
ARCnet Hardware
ARCnet
ATM
AX.25
Linux Ethernet Bonding Driver HOWTO
cdc_mbim - Driver for CDC MBIM Mobile Broadband modems
DCCP protocol
DCTCP (DataCenter TCP)
Device Memory TCP
DNS Resolver Module
Softnet Driver Issues
EQL Driver: Serial IP Load Balancing HOWTO
LC-trie implementation notes
Linux Socket Filtering aka Berkeley Packet Filter (BPF)
Generic HDLC layer
Generic Netlink
Netlink Family Specifications
Generic networking statistics for netlink users
The Linux kernel GTP tunneling module
Identifier Locator Addressing (ILA)
IOAM6 Sysfs variables
IP dynamic address hack-port v0.03
IPsec
IP Sysctl
IPv6
IPVLAN Driver HOWTO
IPvs-sysctl
Kernel Connection Multiplexor
L2TP
The Linux LAPB Module Interface
How to use packet injection with mac80211
Management Component Transport Protocol (MCTP)
MPLS Sysfs variables
Multipath TCP (MPTCP)
MPTCP Sysfs variables
HOWTO for multiqueue network device support
Multi-PF Netdev
NAPI
Common Networking Struct Cachelines
Netconsole
Netdev features mess and how to get out from it alive
Network Devices, the Kernel, and You!
Netfilter Sysfs variables
NETIF Msg Level
Resilient Next-hop Groups
Netfilter Conntrack Sysfs variables
Netfilter’s flowtable infrastructure
OPEN Alliance 10BASE-T1x MAC-PHY Serial Interface (TC6) Framework Support
Open vSwitch datapath developer documentation
Operational States
Packet MMAP
Linux Phonet protocol family
PHY link topology
HOWTO for the linux packet generator
PLIP: The Parallel Line Internet Protocol Device
PPP Generic Driver and Channel Interface
The proc/net/tcp and proc/net/tcp6 variables
Power Sourcing Equipment (PSE) Documentation
How to use radiotap headers
RDS
Linux wireless regulatory documentation
Network Function Representors
RxRPC Network Protocol
SOCKET OPTIONS
SECURITY
EXAMPLE CLIENT USAGE
Linux Kernel SCTP
LSM/SeLinux secid
Seg6 Sysfs variables
struct sk_buff
SMC Sysctl
NIC SR-IOV APIs
Interface statistics
Stream Parser (strparser)
Ethernet switch device driver model (switchdev)
Sysfs tagging
TC Actions - Environmental Rules
TC queue based filtering
TCP Authentication Option Linux implementation (RFC5925)
Thin-streams and TCP
Team
Timestamping
Linux Kernel TIPC
Transparent proxy support
Universal TUN/TAP device driver
The UDP-Lite protocol (RFC 3828)
Virtual Routing and Forwarding (VRF)
Virtual eXtensible Local Area Networking documentation
Linux X.25 Project
X.25 Device Driver Interface
XFRM device - offloading the IPsec computations
XFRM proc - /proc/net/xfrm_* files
XFRM
XFRM Syscall
/proc/sys/net/core/xfrm_* Variables:
XDP RX Metadata
AF_XDP TX Metadata
NetLabel
InfiniBand
ISDN
MHI
Storage interfaces
Other subsystems
Locking
Licensing rules
Writing documentation
Development tools
Testing guide
Hacking guide
Tracing
Fault injection
Livepatching
Rust
Administration
Build system
Reporting issues
Userspace tools
Userspace API
Firmware
Firmware and Devicetree
CPU architectures
Unsorted documentation
Translations
The Linux Kernel
Kernel subsystem documentation
Networking
XFRM Syscall
View page source
XFRM Syscall
¶
/proc/sys/net/core/xfrm_* Variables:
¶
xfrm_acq_expires - INTEGER
default 30 - hard timeout in seconds for acquire requests