linux/drivers/tty/ipwireless/network.c

// SPDX-License-Identifier: GPL-2.0
/*
 * IPWireless 3G PCMCIA Network Driver
 *
 * Original code
 *   by Stephen Blackheath <[email protected]>,
 *      Ben Martel <[email protected]>
 *
 * Copyrighted as follows:
 *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
 *
 * Various driver changes and rewrites, port to new kernels
 *   Copyright (C) 2006-2007 Jiri Kosina
 *
 * Misc code cleanups and updates
 *   Copyright (C) 2007 David Sterba
 */

#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/ppp_channel.h>
#include <linux/ppp_defs.h>
#include <linux/slab.h>
#include <linux/ppp-ioctl.h>
#include <linux/skbuff.h>

#include "network.h"
#include "hardware.h"
#include "main.h"
#include "tty.h"

#define MAX_ASSOCIATED_TTYS …

#define SC_RCV_BITS …

struct ipw_network { … };

static void notify_packet_sent(void *callback_data, unsigned int packet_length)
{ … }

/*
 * Called by the ppp system when it has a packet to send to the hardware.
 */
static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
				     struct sk_buff *skb)
{ … }

/* Handle an ioctl call that has come in via ppp. (copy of ppp_async_ioctl() */
static int ipwireless_ppp_ioctl(struct ppp_channel *ppp_channel,
				unsigned int cmd, unsigned long arg)
{ … }

static const struct ppp_channel_ops ipwireless_ppp_channel_ops = …;

static void do_go_online(struct work_struct *work_go_online)
{ … }

static void do_go_offline(struct work_struct *work_go_offline)
{ … }

void ipwireless_network_notify_control_line_change(struct ipw_network *network,
						   unsigned int channel_idx,
						   unsigned int control_lines,
						   unsigned int changed_mask)
{ … }

/*
 * Some versions of firmware stuff packets with 0xff 0x03 (PPP: ALLSTATIONS, UI)
 * bytes, which are required on sent packet, but not always present on received
 * packets
 */
static struct sk_buff *ipw_packet_received_skb(unsigned char *data,
					       unsigned int length)
{ … }

void ipwireless_network_packet_received(struct ipw_network *network,
					unsigned int channel_idx,
					unsigned char *data,
					unsigned int length)
{ … }

struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw)
{ … }

void ipwireless_network_free(struct ipw_network *network)
{ … }

void ipwireless_associate_network_tty(struct ipw_network *network,
				      unsigned int channel_idx,
				      struct ipw_tty *tty)
{ … }

void ipwireless_disassociate_network_ttys(struct ipw_network *network,
					  unsigned int channel_idx)
{ … }

void ipwireless_ppp_open(struct ipw_network *network)
{ … }

void ipwireless_ppp_close(struct ipw_network *network)
{ … }

int ipwireless_ppp_channel_index(struct ipw_network *network)
{ … }

int ipwireless_ppp_unit_number(struct ipw_network *network)
{ … }

int ipwireless_ppp_mru(const struct ipw_network *network)
{ … }