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/*
* This code lifted from:
* Simple `echo' pseudo-device KLD
* Murray Stokely
* Converted to 5.X by Søren (Xride) Straarup
*/
/*
* /bin/echo "server,port=9999,addr=192.168.69.142,validate" > /dev/krping
* /bin/echo "client,port=9999,addr=192.168.69.142,validate" > /dev/krping
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h> /* uprintf */
#include <sys/errno.h>
#include <sys/param.h> /* defines used in kernel.h */
#include <sys/kernel.h> /* types used in module initialization */
#include <sys/conf.h> /* cdevsw struct */
#include <sys/uio.h> /* uio struct */
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/stdarg.h>
#include "krping.h"
#define BUFFERSIZE 512
SYSCTL_NODE(_dev, OID_AUTO, krping, CTLFLAG_RW, 0, "kernel rping module");
int krping_debug = 0;
SYSCTL_INT(_dev_krping, OID_AUTO, debug, CTLFLAG_RW, &krping_debug, 0 , "");
/* Function prototypes */
static d_open_t krping_open;
static d_close_t krping_close;
static d_read_t krping_read;
static d_write_t krping_write;
/* Character device entry points */
static struct cdevsw krping_cdevsw = {
.d_version = D_VERSION,
.d_open = krping_open,
.d_close = krping_close,
.d_read = krping_read,
.d_write = krping_write,
.d_name = "krping",
};
typedef struct s_krping {
char msg[BUFFERSIZE];
int len;
} krping_t;
struct stats_list_entry {
STAILQ_ENTRY(stats_list_entry) link;
struct krping_stats *stats;
};
STAILQ_HEAD(stats_list, stats_list_entry);
/* vars */
static struct cdev *krping_dev;
static int
krping_loader(struct module *m, int what, void *arg)
{
int err = 0;
switch (what) {
case MOD_LOAD: /* kldload */
krping_init();
krping_dev = make_dev(&krping_cdevsw, 0, UID_ROOT, GID_WHEEL,
0600, "krping");
printf("Krping device loaded.\n");
break;
case MOD_UNLOAD:
destroy_dev(krping_dev);
printf("Krping device unloaded.\n");
break;
default:
err = EOPNOTSUPP;
break;
}
return (err);
}
static int
krping_open(struct cdev *dev, int oflags, int devtype, struct thread *p)
{
return (0);
}
static int
krping_close(struct cdev *dev, int fflag, int devtype, struct thread *p)
{
return 0;
}
static void
krping_copy_stats(struct krping_stats *stats, void *arg)
{
struct stats_list_entry *s;
struct stats_list *list = arg;
s = malloc(sizeof(*s), M_DEVBUF, M_NOWAIT | M_ZERO);
if (s == NULL)
return;
if (stats != NULL) {
s->stats = malloc(sizeof(*stats), M_DEVBUF, M_NOWAIT | M_ZERO);
if (s->stats == NULL) {
free(s, M_DEVBUF);
return;
}
*s->stats = *stats;
}
STAILQ_INSERT_TAIL(list, s, link);
}
static int
krping_read(struct cdev *dev, struct uio *uio, int ioflag)
{
int num = 1;
struct stats_list list;
struct stats_list_entry *e;
STAILQ_INIT(&list);
krping_walk_cb_list(krping_copy_stats, &list);
if (STAILQ_EMPTY(&list))
return (0);
uprintf("krping: %4s %10s %10s %10s %10s %10s %10s %10s %10s %10s\n",
"num", "device", "snd bytes", "snd msgs", "rcv bytes", "rcv msgs",
"wr bytes", "wr msgs", "rd bytes", "rd msgs");
while (!STAILQ_EMPTY(&list)) {
e = STAILQ_FIRST(&list);
STAILQ_REMOVE_HEAD(&list, link);
if (e->stats == NULL)
uprintf("krping: %d listen\n", num);
else {
struct krping_stats *stats = e->stats;
uprintf("krping: %4d %10s %10llu %10llu %10llu %10llu "
"%10llu %10llu %10llu %10llu\n", num, stats->name,
stats->send_bytes, stats->send_msgs,
stats->recv_bytes, stats->recv_msgs,
stats->write_bytes, stats->write_msgs,
stats->read_bytes, stats->read_msgs);
free(stats, M_DEVBUF);
}
num++;
free(e, M_DEVBUF);
}
return (0);
}
static int
krping_write(struct cdev *dev, struct uio *uio, int ioflag)
{
int err = 0;
int amt;
int remain = BUFFERSIZE;
char *cp;
krping_t *krpingmsg;
krpingmsg = malloc(sizeof *krpingmsg, M_DEVBUF, M_WAITOK|M_ZERO);
if (!krpingmsg) {
uprintf("Could not malloc mem!\n");
return ENOMEM;
}
cp = krpingmsg->msg;
while (uio->uio_resid) {
amt = MIN(uio->uio_resid, remain);
if (amt == 0)
break;
/* Copy the string in from user memory to kernel memory */
err = uiomove(cp, amt, uio);
if (err) {
uprintf("Write failed: bad address!\n");
return err;
}
cp += amt;
remain -= amt;
}
if (uio->uio_resid != 0) {
uprintf("Message too big. max size is %d!\n", BUFFERSIZE);
return EMSGSIZE;
}
/* null terminate and remove the \n */
cp--;
*cp = 0;
krpingmsg->len = (unsigned long)(cp - krpingmsg->msg);
uprintf("krping: write string = |%s|\n", krpingmsg->msg);
err = krping_doit(krpingmsg->msg, curproc);
free(krpingmsg, M_DEVBUF);
return(err);
}
int
krping_sigpending(void)
{
return (SIGPENDING(curthread));
}
DEV_MODULE(krping, krping_loader, NULL);
MODULE_DEPEND(krping, ibcore, 1, 1, 1);
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