How are packets passed to the packet socket?

All incoming packets of that protocol type will be passed to the packet socket before they are passed to the protocols implemented in the kernel. In order to create a packet socket, a process must have the CAP_NET_RAW capability in the user namespace that governs its network namespace.

Is there an online tutorial for Packet Tracer?

In Packet tracer if you click Help > Tutorial, it will take you through to an online tutorial guide which takes you through all of the functions of Packet Tracer. I've found this to be very useful. Packet Tracer Official Tutorials

How are packet sockets used in OSI Layer 2?

Packet sockets are used to receive or send raw packets at the device driver (OSI Layer 2) level. They allow the user to implement protocol modules in user space on top of the physical layer. The socket_type is either SOCK_RAW for raw packets including the link-level header or SOCK_DGRAM for cooked packets with the link- level header removed.

How to receive packets on a shared medium?

PACKET_MR_PROMISC enables receiving all packets on a shared medium (often known as "promiscuous mode"), PACKET_MR_MULTICAST binds the socket to the physical-layer multicast group specified in mr_address and mr_alen, and PACKET_MR_ALLMULTI sets the socket up to receive all multicast packets arriving at the interface.

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packet - Linux manual page

PACKET(7) Linux Programmer's Manual PACKET(7) NAME top packet - packet interface on device level SYNOPSIS top #include <sys/socket.h> #include <linux/if_packet.h> #include <net/ethernet.h> /* the L2 protocols */ packet_socket = socket(AF_PACKET, int socket_type, int protocol); DESCRIPTION top Packet sockets are used to receive or send raw packets at the device driver (OSI Layer 2) level.

Packet Tracer - Tutorial / Guide / Book..

Hi Atticraider, Luke has provided you with valuable information related to Packet Tracer. I would just like to add that you can also use the help menu in Packet Tracer, it leads to extensive instructions, tutorials and how-to information regarding Packet Tracer:

CCNA 2 Activities Lab Manuals Packet Tracer

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Frequently Asked Questions

How are packets passed to the packet socket?

All incoming packets of that protocol type will be passed to the packet socket before they are passed to the protocols implemented in the kernel. In order to create a packet socket, a process must have the CAP_NET_RAW capability in the user namespace that governs its network namespace.
Is there an online tutorial for Packet Tracer?

In Packet tracer if you click Help > Tutorial, it will take you through to an online tutorial guide which takes you through all of the functions of Packet Tracer. I've found this to be very useful. Packet Tracer Official Tutorials
How are packet sockets used in OSI Layer 2?

Packet sockets are used to receive or send raw packets at the device driver (OSI Layer 2) level. They allow the user to implement protocol modules in user space on top of the physical layer. The socket_type is either SOCK_RAW for raw packets including the link-level header or SOCK_DGRAM for cooked packets with the link- level header removed.
How to receive packets on a shared medium?

PACKET_MR_PROMISC enables receiving all packets on a shared medium (often known as "promiscuous mode"), PACKET_MR_MULTICAST binds the socket to the physical-layer multicast group specified in mr_address and mr_alen, and PACKET_MR_ALLMULTI sets the socket up to receive all multicast packets arriving at the interface.