Linux Socket Programming Hands On - Zero to Hero

Learn how sockets act as two endpoints for communication, with local and remote sockets, IP addressing, and TCP's reliable connection-oriented data exchange.

Identify the two main socket types in Linux: local sockets using Unix domain addresses and a filesystem socket file. Learn how remote sockets use IP addresses.

Learn how Linux sockets work as file descriptors via system calls, and how to create, bind, listen, accept, connect, and read and write between local and remote processes.

bind assigns a socket address with a generic address structure and length; the server listens with a backlog, accepts connections to create new client sockets, then reads and writes.

Build a practical local socket client using socket, connect, and read/write to a server via a local socket file, handling single and multiple clients.

Explore how internet sockets use network byte order for communication. Learn to convert 16-bit ports and 32-bit IP addresses between host and network orders using host-to-network and network-to-host conversions.

Learn how to initialize a server socket address, select ip and port with wildcards or specifics, and convert between string and network order using inet_addr and inet_ntoa.

Create a server socket and bind it with sockaddr_in by setting sin_family, sin_addr, and sin_port; convert IPs to network byte order and close the socket.

Learn to build a practical echo server using internet sockets: bind, listen with backlog, accept connections, communicate by receiving and sending data, and close session sockets after each client.

Build a practical echo client by creating a socket, connecting to a server, and exchanging a hello message with the server before closing the connection.

Upgrade a single-client Linux socket server to a concurrent one by using an infinite loop to accept each new client, service the client in turn, and enable parallel handling.

Compare echo and concurrent servers, and learn how fork creates child processes to handle multiple clients in parallel using a concurrent server.

Implement a concurrent socket server by forking a child to handle each client while the parent continues listening for new connections, testing with multiple clients.

Explore how a concurrent server uses forked child processes, wait and signal system calls to obtain termination status, and manage jambi and jumbe processes with a signal handler.

Learn how a concurrent server handles multiple client requests by forking child processes and using a SIGCHLD signal handler with wait to reap terminated children, preventing zombie processes.

Compare UDP sockets to TCP by highlighting a connectionless, datagram approach. Bind sockets to identifiable addresses and use sendto and recvfrom to exchange data with destination and from addresses.

Build a UDP server using sockets, bind to a network address, and receive datagrams from clients into a buffer.

explore the select system call to monitor multiple file descriptors in linux socket programming, handling listening and session sockets with fd sets for read and write and end-of-file signaling.

Learn how the select system call monitors multiple fds with read, write, and except sets. Understand nfds, timeouts, and the workflow from a listening socket to serving ready descriptors.

Master the select system call to monitor multiple file descriptors and read data when ready. Handle end-of-file, close connections, and update the nfds value and fd sets as described.

Practice the practical implementation of the select system call by building a server that uses fd sets to monitor listening and client sockets, accepts connections, and reads and writes data.

Explore the select system call to multiplex multiple client connections on a server, handling accept, read, and write operations with readiness notifications and nonblocking data transfer.