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#include <asm/errno.h>
#include "intf.h"
#include "list.h"
#include "fsm.h"
int tsnif_debug = 0;
static struct tsnif_term *term_find(struct tsnif_handle *h, int type, int idx)
{
struct tsnif_term *t;
list_for_each_entry(t, &h->terms, list)
if ((t->type == type) &&
(t->idx == idx))
return t;
return NULL;
}
static int process_notify(struct tsnif_handle *h, struct trans_msg *msg)
{
struct tsnif_term term;
if (msg->ack)
return 0;
if (!h->ops || !h->ops->cb_notify)
return -1;
/* otherwise return fake one */
memset(&term, 0x0, sizeof(term));
term.type = msg->type;
term.idx = msg->idx;
term.handle = h;
term.state = TSNIF_INTF_STATE_NONE;
return h->ops->cb_notify(&term, msg->cmd);
}
static int process_mgroup(struct tsnif_handle *h, struct trans_msg *msg)
{
if (msg->ack)
return 0;
return trans_group(&h->trans, msg->group);
}
static int trans_cb(struct trans_handle *h, struct trans_msg *msg)
{
struct tsnif_handle *handle;
struct tsnif_term *term;
TSNIF_DEBUG("got cmd %d, type %d, idx %d\n",
msg->cmd, msg->type, msg->idx);
handle = container_of(h, struct tsnif_handle, trans);
/* do we have this term */
term = term_find(handle, msg->type, msg->idx);
/* non term related bussines */
switch(msg->cmd) {
case TSNIF_CMD_TTY_RELEASE:
/* if we are handling the term,
* let's fsm do the job */
if (term)
break;
/* falling throught intentionaly */
case TSNIF_CMD_TTY_CREATE:
case TSNIF_CMD_TTY_LIST:
return process_notify(handle, msg);
case TSNIF_CMD_MGROUP:
return process_mgroup(handle, msg);
}
/* no term no job here */
if (!term)
return -ENODEV;
return fsm_process(handle, term, msg);
}
static int init_mgroup(struct tsnif_handle *h)
{
struct trans_msg msg;
TSNIF_DEBUG("sending mgroup command\n");
msg.cmd = TSNIF_CMD_MGROUP;
return trans_send(&h->trans, &msg);
}
int tsnif_init(struct tsnif_handle *h, struct tsnif_ops *ops)
{
int err;
if (!ops)
return -EINVAL;
memset(h, 0x0, sizeof(*h));
h->ops = ops;
INIT_LIST_HEAD(&h->terms);
err = trans_init(&h->trans, trans_cb);
if (err)
return err;
return init_mgroup(h);
}
int tsnif_close(struct tsnif_handle *h)
{
return trans_close(&h->trans);
}
int tsnif_process(struct tsnif_handle *h)
{
return trans_process(&h->trans);
}
int tsnif_fd(struct tsnif_handle *h)
{
return trans_fd(&h->trans);
}
int tsnif_term_add(struct tsnif_handle *h, struct tsnif_term *term,
int type, int idx)
{
struct tsnif_term *t;
t = term_find(h, type, idx);
if (t)
return -EEXIST;
memset(term, 0x0, sizeof(*term));
term->type = type;
term->idx = idx;
term->handle = h;
term->state = TSNIF_INTF_STATE_NEW;
list_add_tail(&term->list, &h->terms);
return 0;
}
int tsnif_term_del(struct tsnif_handle *h, struct tsnif_term *term)
{
list_del(&term->list);
return 0;
}
int tsnif_attach(struct tsnif_term *term)
{
struct trans_msg msg;
struct tsnif_handle *h = term->handle;
TSNIF_DEBUG("type %d, idx %d\n", term->type, term->idx);
if (fsm_send(term, TSNIF_CMD_ATTACH)) {
TSNIF_DEBUG("wrong state (%d) skiping detach\n",
term->state);
return -1;
}
msg.type = term->type;
msg.idx = term->idx;
msg.cmd = TSNIF_CMD_ATTACH;
return trans_send(&h->trans, &msg);
}
int tsnif_detach(struct tsnif_term *term)
{
struct trans_msg msg;
struct tsnif_handle *h = term->handle;
TSNIF_DEBUG("type %d, idx %d\n", term->type, term->idx);
if (fsm_send(term, TSNIF_CMD_DETACH)) {
TSNIF_DEBUG("wrong state (%d) skiping detach\n",
term->state);
return -1;
}
msg.type = term->type;
msg.idx = term->idx;
msg.cmd = TSNIF_CMD_DETACH;
return trans_send(&h->trans, &msg);
}
int tsnif_list(struct tsnif_handle *h)
{
struct trans_msg msg;
TSNIF_DEBUG("sending list command\n");
memset(&msg, 0x0, sizeof(msg));
msg.cmd = TSNIF_CMD_TTY_LIST;
return trans_send(&h->trans, &msg);
}
int tsnif_enum(struct tsnif_handle *h, cb_tsnif_enum_t cb)
{
struct tsnif_term *term, *t;
int err = 0;
list_for_each_entry_safe(term, t, &h->terms, list) {
err = cb(term);
if (err)
break;
}
return err;;
}
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