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moonraker.c
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/
moonraker.c
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#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/in.h>
#include <linux/socket.h>
#include <linux/net.h>
#include <linux/tcp.h>
//inet
#include <net/inet_connection_sock.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Daymion Reynolds <daymion@gmail.com>");
MODULE_DESCRIPTION("In-kernel Cache");
//module_param(buffer_size, ulong, (S_IRUSR | S_IRGRP | S_IROTH));
//MODULE_PARM_DESC(buffer_size, "Internal buffer size");
#define CONFIG_TUX_NUMTHREADS 16
#define NR_IO_THREADS 64
#define CONFIG_TUX_NUMSOCKETS 16
#define MOONRAKER_LOGGING 5
typedef struct moonraker_error_s{
int level;
char* msg;
}moonraker_error_t;
typedef struct moonraker_req_s{
char *url;
int size;
int duration;
int time;
moonraker_error_t *error;
}moonraker_req_t;
typedef struct moonraker_proto_s
{
unsigned int defer_accept;
unsigned int can_redirect;
//atom_func_t *illegal_request;
//atom_func_t *request_timeout;
char *name;
} moonraker_proto_t;
typedef struct moonraker_socket_s{
moonraker_proto_t *proto;
unsigned int ip;
unsigned short port;
struct proc_dir_entry *entry;
int keepalive_timeout;
unsigned int ack_pingpong;
unsigned int defer_accept;
unsigned int max_backlog;
} moonraker_socket_t;
void moon_log(moonraker_req_t *req);
moonraker_req_t *moon_req_alloc(void);
void moon_req_free(moonraker_req_t *req);
void moon_req_free_error(moonraker_req_t *req);
void moon_req_add_error(moonraker_req_t *req,int level,char* msg);
void moon_req_add_url(moonraker_req_t *req,char *url);
void moon_listen(void);
static int __init moonraker_init(void)
{
printk(KERN_INFO "Moonraker device has been registered\n");
return 0;
}
static void __exit moonraker_exit(void)
{
printk(KERN_INFO "Moonraker device has been unregistered\n");
}
//Moonraker loger
void moon_log(moonraker_req_t *req)
{
if(req->error->level<MOONRAKER_LOGGING)
return;
printk(KERN_INFO "information received");
//Log it
}
//Moonraker Request memory managment
//long term this will not work due to the copy of the request
//will need to minimize this.
moonraker_req_t *moon_req_alloc(void)
{
moonraker_req_t *req = kmalloc(sizeof(moonraker_req_t),GFP_KERNEL);
req->url=NULL;
req->error=NULL;
return req;
}
//start_listening
void moon_listen(void)
{
//For test purposes
moonraker_socket_t *listen;
listen = kmalloc(sizeof(moonraker_socket_t),GFP_KERNEL);
listen->proto = kmalloc(sizeof(moonraker_proto_t),GFP_KERNEL);
listen->proto->name = kmalloc(5,GFP_KERNEL);
listen->ip = 2130706433;
listen->port = 80;
listen->proto->defer_accept=0;
listen->keepalive_timeout=0;
listen->ack_pingpong=1;
listen->max_backlog=2048;
listen->defer_accept=1;
strcpy(listen->proto->name,"http");
//end for test purpose
struct sockaddr_in sin;
struct socket *sock = NULL;
struct sock *sk;
struct tcp_sock *tp;
struct inet_connection_sock *icsk;
moonraker_proto_t *proto = listen->proto;
u16 port = listen->port;
u32 addr = listen->ip; //127.0.0.1
int err = 0;
err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
if (err) {
printk(KERN_ERR "Moonraker: error %d creating socket.\n", err);
goto error;
}
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(addr);
sin.sin_port = htons(port);
sk = sock->sk;
icsk = inet_csk(sk);
sk->sk_reuse = 1;
sock_set_flag(sk, SOCK_URGINLINE);
err = sock->ops->bind(sock, (struct sockaddr*)&sin, sizeof(sin));
if (err){
printk(KERN_ERR "Moonraker: error %d binding socket. This means that probably some other process is (or was a short time ago) using addr %d\n",err,sin.sin_addr.s_addr);
goto error;
}
tp = tcp_sk(sk);
printk("listen sk accept_queue: %d.\n",!reqsk_queue_empty(&icsk->icsk_accept_queue));
icsk->icsk_ack.pingpong = listen->ack_pingpong;
sock_reset_flag(sk, SOCK_LINGER);
sk->sk_lingertime = 0;
tp->linger2 = listen->keepalive_timeout * HZ;
if (proto->defer_accept && !listen->keepalive_timeout && listen->defer_accept)
icsk->icsk_accept_queue.rskq_defer_accept = 1;
err = sock->ops->listen(sock, listen->max_backlog);
if (err) {
printk(KERN_ERR "Moonraker: error %d listening on socket.\n", err);
goto error;
}
printk(KERN_NOTICE "Moonraker: thread %d listens on %s://%d.%d.%d.%d:%d.\n",
1, proto->name, HIPQUAD(addr), port);
// return sock;
return;
error:
if (sock)
sock_release(sock);
return;
return NULL;
}
void moon_req_add_url(moonraker_req_t *req, char *url)
{
req->url = kmalloc(strlen(url)+1,GFP_KERNEL);
strcpy(req->url,url);
}
void moon_req_free(moonraker_req_t *req)
{
if(req->url!=NULL)
kfree(req->url);
moon_req_free_error(req);
kfree(req);
}
void moon_req_free_error(moonraker_req_t *req)
{
if(req->error!=NULL)
{
if(req->error->msg!=NULL)
kfree(req->error->msg);
kfree(req->error);
}
req->error=NULL;
}
void moon_req_add_error(moonraker_req_t *req, int level, char *msg)
{
moonraker_error_t *error;
moon_req_free_error(req);
error = kmalloc(sizeof(moonraker_error_t),GFP_KERNEL);
error->level = level;
error->msg = kmalloc(strlen(msg)+1,GFP_KERNEL);
strcpy(error->msg,msg);
req->error = error;
}
//end Moonraker Request memory managment
module_init(moonraker_init);
module_exit(moonraker_exit);