keepalived源码浅析——sock

sock.h 源码

 

#ifndef _SOCK_H#define _SOCK_H/* system includes */#include <openssl/ssl.h>  //需包含openssl库#include <openssl/md5.h>/* Engine socket pool element structure */  //sock 池 元素的结构体typedef struct {int fd;SSL *ssl;BIO *bio;MD5_CTX context;int status;int lock;char *buffer;char *extracted;int size;int total_size;} SOCK;/* global vars exported */  //全局变量extern SOCK *sock;/* Prototypes */extern void free_sock(SOCK *);extern void init_sock(void);#endif

 

sock.c源码

#include <string.h>#include "memory.h"#include "utils.h"#include "list.h"#include "sock.h"#include "layer4.h"#include "ssl.h"#include "main.h"/* global var */    //全局变量 SOCK指针SOCK *sock = NULL;/* Close the descriptor */ //关闭sock 如果有ssl句柄则关闭销毁static voidclose_sock(SOCK * sock_obj){if (sock_obj->ssl) {SSL_shutdown(sock_obj->ssl);SSL_free(sock_obj->ssl);}close(sock_obj->fd);}/* Destroy the socket handler */ //销毁socket句柄voidfree_sock(SOCK * sock_obj){DBG("Freeing fd:%d\n", sock_obj->fd);close_sock(sock_obj);FREE(sock_obj);}/* Init socket handler */ //sock句柄的初始化 voidinit_sock(void){sock = (SOCK *) MALLOC(sizeof (SOCK));memset(sock, 0, sizeof (SOCK));thread_add_event(master, tcp_connect_thread, sock, 0);}

调用位置：

main.c 中

/* Register the GET request */init_sock();

Scheduler.c中

 

/* Add simple event thread. */thread_t *thread_add_event(thread_master_t * m, int (*func) (thread_t *) , void *arg, int val){thread_t *thread;assert(m != NULL);thread = thread_new(m);thread->type = THREAD_EVENT;thread->id = 0;thread->master = m;thread->func = func;thread->arg = arg;thread->u.val = val;thread_list_add(&m->event, thread);return thread;}其中 /* global vars */thread_master_t *master = NULL;