BSD Socket API

* BSD socket API에 대한 소개와 Kernel 흐름도를 정리합니다. (linux 5.15 기준)

BSD Socket API Model

* BSD Socket API: Berkeley Software Distribution Socket API

출처: https://www.keil.com/pack/doc/mw6/Network/html/using_network_sockets_bsd.html

출처: https://en.wikipedia.org/wiki/Berkeley_sockets

 

 

1. Socket()

#include <sys/socket.h>

socket(int socket_family, int socket_type, int protocol);

 

Socket Systemcall: https://byeo.tistory.com/entry/socket-system-call

socket system call 1 (syscall_socket ~ __sock_create)

 

 

2. Bind()

#include <sys/socket.h>

int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);

bind system call: https://byeo.tistory.com/entry/bind-system-call-1

bind system call 1 (__sys_bind)

 

 

 

3. Listen()

#include <sys/socket.h>

int listen(int sockfd, int backlog);

 

 

4. accept

#include <sys/socket.h>

int accept(int sockfd, struct sockaddr *_Nullable restrict addr, socklen_t *_Nullable restrict addrlen);

accept system call: https://byeo.tistory.com/entry/accept-system-call-1-sysaccept4

accept system call 1 (__sys_accept4)

 

 

 

읽어볼 자료

• SO_REUSEADDR vs SO_REUSEPORT : https://stackoverflow.com/questions/14388706/how-do-so-reuseaddr-and-so-reuseport-differ
• TCP connection repair: https://lwn.net/Articles/495304/
• TCP SYN and Accept queue concept: https://blog.cloudflare.com/syn-packet-handling-in-the-wild