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A typical IPv4 header is fixed in length. However there is a provision to add extra dynamically sized IP Options header used for Network testing and debugging. Although it is…
Network_data_flow_through_kernel - here is a detailed IPv4 Network API and data-structure API Map originally published in Linux Foundation Wiki
dst_entry() is one of the important Linux Kernel Networking subsystem data-structure which is used while navigating the packet flow within the IPv4 stack. It contains function pointers one for input…
As I discussed in various episodes and articles in the past there are various ways via which you can communicate from Kernel space to User space and vice-versa. Some of…
The Linux kernel is the backbone of the Linux operating system. A device tree is a hierarchical tree structure that describes the various devices that are present in a system,…
https://youtu.be/3holOpVOcN4
Refer:Linux Kernel main TCP congestion control support implementation /net/ipv4/tcp_cong.c ↗ APIs:tcp_register_congestion_control(), tcp_unregister_congestion_control() ↗tcp_ca_find() ↗tcp_set_congestion_control() ↗tcp_init_congestion_control(), tcp_reinit_congestion_control() ↗tcp_get_allowed_congestion_control(), tcp_set_allowed_congestion_control() ↗tcp_set_default_congestion_control() ↗tcp_get_available_congestion_control() ↗ Data-structures:struct tcp_congestion_ops data-structure ↗static LIST_HEAD(tcp_cong_list); – Linked List ↗…
Refer:Wiki:CUBIC TCP ↗BIC TCP ↗LFN: long fat networks ↗Bandwidth-delay product ↗ Linux Kernel Source:TCP CUBIC: Binary Increase Congestion control for TCP v2.3 ↗static struct tcp_congestion_ops cubictcp ↗static int __init cubictcp_register(void)…
Refer:TCP congestion control – Wiki ↗Linux Kernel – IPv4 Stack /net/ipv4 ↗TCP CUBIC: Binary Increase Congestion control for TCP – /net/ipv4/tcp_cubic.c ↗TCP-HYBLA Congestion control algorithm – /net/ipv4/tcp_hybla.c ↗TCP Illinois congestion…
Refer:Linux Kernel Source:struct task_struct data-structure ↗struct mm_struct data-structure ↗Task state bitmask flags – tsk->state ↗ Here is the struct mm_struct data-structure data-structure (/include/linux/mm_types.h) from the Kernel-source version 4.14 for quick…
Refer:Linux Kernel Source:struct task_struct data-structure ↗Task state bitmask flags – tsk->state ↗struct task_struct instance example1: TASK_RUNNING, TASK_INTERRUPTIBLE, TASK_UNINTERRUPTIBLE, TASK_STOPPED ↗struct task_struct instance example2: struct task_struct *p – p->state == TASK_RUNNING…
net-tools is a popular Linux Open-Source package includes the important user-space tools for controlling the network subsystem of the Linux kernel. Which includes arp, rarp, ifconfig, ipmaddr, mii-tool, netstat, rarp,…
Refer my Google Drive export diagram of the net-tools :: ifconfig command implementation architecture:
net-tools is a popular Linux Open-Source package includes the important user-space tools for controlling the network subsystem of the Linux kernel. Which includes arp, rarp, ifconfig, ipmaddr, mii-tool, netstat, rarp,…
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