Hi,
I've been trying to write a program to send a message to a specific host
with a specific MAC address. I used the socket(9) kernel interface socket
functions, but the kernel keeps crashing when I try to load it. I have
posted the code below. Can someone please tell me what is wrong with this
code?
Cheers,
Sadish.
#include <sys/errno.h>
//#include <sys/type.h>
//#include <netinet/in.h>
#include <sys/param.h>
//#include <sys/errno.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/types.h>
//#include <sys/socket.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/ioccom.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/proc.h>
#include <sys/syscall.h>
#include <sys/queue.h>
#include <machine/iodev.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/pfil.h>
//#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_var.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <sys/socketvar.h>
static int wake(void);
//typedef u8;
static int wake(void)
{
unsigned int i,j;
unsigned char k[6] = {0x1F,0x00,0xDD,0x1D,0x3B,0x2E}; /*need to fix
the correct MAC*/
unsigned char wolBuff[136];
unsigned char* ptr;
//int optval = 1;
int packet;
//int sendint;
struct socket *sok;
struct sockaddr_in sap;
//struct sockaddr *sap;
//struct ucred *crd;
//struct thread *trd;
struct uio auio;
struct iovec aiov;
struct sockopt sokoptions;
aiov.iov_base = (caddr_t) &wolBuff;//&wolBuff;
aiov.iov_len = sizeof(wolBuff);//strlen(wolBuff);
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_offset = 0;
auio.uio_resid = sizeof(wolBuff);//strlen(wolBuff);
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_rw = UIO_WRITE;
auio.uio_td = 0;
//sokoptions.sopt_dir = SOPT_SET;
//sokoptions.sopt_level = SOL_SOCKET;
//sokoptions.sopt_name = packet;
//sokoptions.sopt_val = 0;
//sokoptions.sopt_valsize = 0;
//sokoptions.sopt_td = NULL;
ptr = wolBuff;
for(i=0; i<6; i++)
{
*ptr++ = 0xFF;
}
for(j=0; j<16; j++)
{
for(i=0; i<6; i++)
{
*ptr++ = k[i];
}
}
//uprintf("print buffer %u",*ptr);
//packet = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
packet = socreate(AF_LINK, &sok, SOCK_DGRAM,0, 0, 0);
if(sok==NULL)
{
uprintf("sok null\n");
goto ret;
}
sokoptions.sopt_dir = SOPT_SET;
sokoptions.sopt_level = SOL_SOCKET;
sokoptions.sopt_name = packet;
sokoptions.sopt_val = 0;
sokoptions.sopt_valsize = 0;
sokoptions.sopt_td = NULL;
//sosetopt((struct socket *)packet, &sokoptions);
/* Set up broadcast address */
sap.sin_family = AF_INET;
sap.sin_addr.s_addr = INADDR_BROADCAST;//htonl(0xffffffff)
sap.sin_port = htons(6000);
uprintf("aaaaaaaaaaaaa \n"); //just for testing
packet = sosend(sok, (struct sockaddr *)&sap, &auio, 0, 0, 0, 0);
if(packet <0)
{
uprintf("bbbbbbbbbbbbb \n");
goto ret;
}
//soclose(sok);
ret:
return 0;
}
static int deinit(void)
{
uprintf("module unloaded \n");
return 0;
}
/* The function to load/unload kernel module*/
static int event_handler(struct module *module, int event, void *arg)
{
int error =0; /* Error, 0 for normal return status*/
switch (event)
{
case MOD_LOAD:
error = wake();
break;
case MOD_UNLOAD:
error = deinit();
break;
default:
error = EOPNOTSUPP; /*Error operation not supported*/
break;
}
return(error);
}
/*argument for DECLARE_MODULE macro*/
static moduledata_t test_conf ={
"WOLgenerator", /*module name */
event_handler, /* event handler function*/
"NULL" /* extra data*/
};
/*int
dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
int err = 0;
if (count > 0)
return EBUSY;
count = 1;
return (err);
}
int
dev_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
int err = 0;
count = 0;
return (err);
}
int
dev_read(struct cdev *dev, struct uio *uio, int ioflag)
{
int rv = 0;
sprintf(flwbuf, "%016d, %9u \n", bytes,sport);
rv = uiomove(flwbuf, MIN(uio->uio_resid, strlen(flwbuf)), uio);
return rv;
}*/
DECLARE_MODULE(WOLgenerator,test_conf,SI_SUB_KLD,SI_ORDER_ANY); /* the name
of module, the moduledata_t structure,???,order of loading*/
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