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-rw-r--r--arch/um/drivers/net_kern.c896
1 files changed, 896 insertions, 0 deletions
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
new file mode 100644
index 00000000000..4eeaf88c1e9
--- /dev/null
+++ b/arch/um/drivers/net_kern.c
@@ -0,0 +1,896 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ * Licensed under the GPL.
+ */
+
+#include "linux/config.h"
+#include "linux/kernel.h"
+#include "linux/netdevice.h"
+#include "linux/rtnetlink.h"
+#include "linux/skbuff.h"
+#include "linux/socket.h"
+#include "linux/spinlock.h"
+#include "linux/module.h"
+#include "linux/init.h"
+#include "linux/etherdevice.h"
+#include "linux/list.h"
+#include "linux/inetdevice.h"
+#include "linux/ctype.h"
+#include "linux/bootmem.h"
+#include "linux/ethtool.h"
+#include "asm/uaccess.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "net_kern.h"
+#include "net_user.h"
+#include "mconsole_kern.h"
+#include "init.h"
+#include "irq_user.h"
+#include "irq_kern.h"
+
+#define DRIVER_NAME "uml-netdev"
+
+static DEFINE_SPINLOCK(opened_lock);
+LIST_HEAD(opened);
+
+static int uml_net_rx(struct net_device *dev)
+{
+ struct uml_net_private *lp = dev->priv;
+ int pkt_len;
+ struct sk_buff *skb;
+
+ /* If we can't allocate memory, try again next round. */
+ skb = dev_alloc_skb(dev->mtu);
+ if (skb == NULL) {
+ lp->stats.rx_dropped++;
+ return 0;
+ }
+
+ skb->dev = dev;
+ skb_put(skb, dev->mtu);
+ skb->mac.raw = skb->data;
+ pkt_len = (*lp->read)(lp->fd, &skb, lp);
+
+ if (pkt_len > 0) {
+ skb_trim(skb, pkt_len);
+ skb->protocol = (*lp->protocol)(skb);
+ netif_rx(skb);
+
+ lp->stats.rx_bytes += skb->len;
+ lp->stats.rx_packets++;
+ return pkt_len;
+ }
+
+ kfree_skb(skb);
+ return pkt_len;
+}
+
+irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct uml_net_private *lp = dev->priv;
+ int err;
+
+ if(!netif_running(dev))
+ return(IRQ_NONE);
+
+ spin_lock(&lp->lock);
+ while((err = uml_net_rx(dev)) > 0) ;
+ if(err < 0) {
+ printk(KERN_ERR
+ "Device '%s' read returned %d, shutting it down\n",
+ dev->name, err);
+ dev_close(dev);
+ goto out;
+ }
+ reactivate_fd(lp->fd, UM_ETH_IRQ);
+
+ out:
+ spin_unlock(&lp->lock);
+ return(IRQ_HANDLED);
+}
+
+static int uml_net_open(struct net_device *dev)
+{
+ struct uml_net_private *lp = dev->priv;
+ char addr[sizeof("255.255.255.255\0")];
+ int err;
+
+ spin_lock(&lp->lock);
+
+ if(lp->fd >= 0){
+ err = -ENXIO;
+ goto out;
+ }
+
+ if(!lp->have_mac){
+ dev_ip_addr(dev, addr, &lp->mac[2]);
+ set_ether_mac(dev, lp->mac);
+ }
+
+ lp->fd = (*lp->open)(&lp->user);
+ if(lp->fd < 0){
+ err = lp->fd;
+ goto out;
+ }
+
+ err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt,
+ SA_INTERRUPT | SA_SHIRQ, dev->name, dev);
+ if(err != 0){
+ printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err);
+ if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user);
+ lp->fd = -1;
+ err = -ENETUNREACH;
+ }
+
+ lp->tl.data = (unsigned long) &lp->user;
+ netif_start_queue(dev);
+
+ /* clear buffer - it can happen that the host side of the interface
+ * is full when we get here. In this case, new data is never queued,
+ * SIGIOs never arrive, and the net never works.
+ */
+ while((err = uml_net_rx(dev)) > 0) ;
+
+ out:
+ spin_unlock(&lp->lock);
+ return(err);
+}
+
+static int uml_net_close(struct net_device *dev)
+{
+ struct uml_net_private *lp = dev->priv;
+
+ netif_stop_queue(dev);
+ spin_lock(&lp->lock);
+
+ free_irq_by_irq_and_dev(dev->irq, dev);
+ free_irq(dev->irq, dev);
+ if(lp->close != NULL)
+ (*lp->close)(lp->fd, &lp->user);
+ lp->fd = -1;
+
+ spin_unlock(&lp->lock);
+ return 0;
+}
+
+static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct uml_net_private *lp = dev->priv;
+ unsigned long flags;
+ int len;
+
+ netif_stop_queue(dev);
+
+ spin_lock_irqsave(&lp->lock, flags);
+
+ len = (*lp->write)(lp->fd, &skb, lp);
+
+ if(len == skb->len) {
+ lp->stats.tx_packets++;
+ lp->stats.tx_bytes += skb->len;
+ dev->trans_start = jiffies;
+ netif_start_queue(dev);
+
+ /* this is normally done in the interrupt when tx finishes */
+ netif_wake_queue(dev);
+ }
+ else if(len == 0){
+ netif_start_queue(dev);
+ lp->stats.tx_dropped++;
+ }
+ else {
+ netif_start_queue(dev);
+ printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len);
+ }
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
+static struct net_device_stats *uml_net_get_stats(struct net_device *dev)
+{
+ struct uml_net_private *lp = dev->priv;
+ return &lp->stats;
+}
+
+static void uml_net_set_multicast_list(struct net_device *dev)
+{
+ if (dev->flags & IFF_PROMISC) return;
+ else if (dev->mc_count) dev->flags |= IFF_ALLMULTI;
+ else dev->flags &= ~IFF_ALLMULTI;
+}
+
+static void uml_net_tx_timeout(struct net_device *dev)
+{
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+static int uml_net_set_mac(struct net_device *dev, void *addr)
+{
+ struct uml_net_private *lp = dev->priv;
+ struct sockaddr *hwaddr = addr;
+
+ spin_lock(&lp->lock);
+ memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN);
+ spin_unlock(&lp->lock);
+
+ return(0);
+}
+
+static int uml_net_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct uml_net_private *lp = dev->priv;
+ int err = 0;
+
+ spin_lock(&lp->lock);
+
+ new_mtu = (*lp->set_mtu)(new_mtu, &lp->user);
+ if(new_mtu < 0){
+ err = new_mtu;
+ goto out;
+ }
+
+ dev->mtu = new_mtu;
+
+ out:
+ spin_unlock(&lp->lock);
+ return err;
+}
+
+static int uml_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ static const struct ethtool_drvinfo info = {
+ .cmd = ETHTOOL_GDRVINFO,
+ .driver = DRIVER_NAME,
+ .version = "42",
+ };
+ void *useraddr;
+ u32 ethcmd;
+
+ switch (cmd) {
+ case SIOCETHTOOL:
+ useraddr = ifr->ifr_data;
+ if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
+ return -EFAULT;
+ switch (ethcmd) {
+ case ETHTOOL_GDRVINFO:
+ if (copy_to_user(useraddr, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+void uml_net_user_timer_expire(unsigned long _conn)
+{
+#ifdef undef
+ struct connection *conn = (struct connection *)_conn;
+
+ dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn);
+ do_connect(conn);
+#endif
+}
+
+static DEFINE_SPINLOCK(devices_lock);
+static struct list_head devices = LIST_HEAD_INIT(devices);
+
+static struct device_driver uml_net_driver = {
+ .name = DRIVER_NAME,
+ .bus = &platform_bus_type,
+};
+static int driver_registered;
+
+static int eth_configure(int n, void *init, char *mac,
+ struct transport *transport)
+{
+ struct uml_net *device;
+ struct net_device *dev;
+ struct uml_net_private *lp;
+ int save, err, size;
+
+ size = transport->private_size + sizeof(struct uml_net_private) +
+ sizeof(((struct uml_net_private *) 0)->user);
+
+ device = kmalloc(sizeof(*device), GFP_KERNEL);
+ if (device == NULL) {
+ printk(KERN_ERR "eth_configure failed to allocate uml_net\n");
+ return(1);
+ }
+
+ memset(device, 0, sizeof(*device));
+ INIT_LIST_HEAD(&device->list);
+ device->index = n;
+
+ spin_lock(&devices_lock);
+ list_add(&device->list, &devices);
+ spin_unlock(&devices_lock);
+
+ if (setup_etheraddr(mac, device->mac))
+ device->have_mac = 1;
+
+ printk(KERN_INFO "Netdevice %d ", n);
+ if (device->have_mac)
+ printk("(%02x:%02x:%02x:%02x:%02x:%02x) ",
+ device->mac[0], device->mac[1],
+ device->mac[2], device->mac[3],
+ device->mac[4], device->mac[5]);
+ printk(": ");
+ dev = alloc_etherdev(size);
+ if (dev == NULL) {
+ printk(KERN_ERR "eth_configure: failed to allocate device\n");
+ return 1;
+ }
+
+ /* sysfs register */
+ if (!driver_registered) {
+ driver_register(&uml_net_driver);
+ driver_registered = 1;
+ }
+ device->pdev.id = n;
+ device->pdev.name = DRIVER_NAME;
+ platform_device_register(&device->pdev);
+ SET_NETDEV_DEV(dev,&device->pdev.dev);
+
+ /* If this name ends up conflicting with an existing registered
+ * netdevice, that is OK, register_netdev{,ice}() will notice this
+ * and fail.
+ */
+ snprintf(dev->name, sizeof(dev->name), "eth%d", n);
+ device->dev = dev;
+
+ (*transport->kern->init)(dev, init);
+
+ dev->mtu = transport->user->max_packet;
+ dev->open = uml_net_open;
+ dev->hard_start_xmit = uml_net_start_xmit;
+ dev->stop = uml_net_close;
+ dev->get_stats = uml_net_get_stats;
+ dev->set_multicast_list = uml_net_set_multicast_list;
+ dev->tx_timeout = uml_net_tx_timeout;
+ dev->set_mac_address = uml_net_set_mac;
+ dev->change_mtu = uml_net_change_mtu;
+ dev->do_ioctl = uml_net_ioctl;
+ dev->watchdog_timeo = (HZ >> 1);
+ dev->irq = UM_ETH_IRQ;
+
+ rtnl_lock();
+ err = register_netdevice(dev);
+ rtnl_unlock();
+ if (err) {
+ device->dev = NULL;
+ /* XXX: should we call ->remove() here? */
+ free_netdev(dev);
+ return 1;
+ }
+ lp = dev->priv;
+
+ /* lp.user is the first four bytes of the transport data, which
+ * has already been initialized. This structure assignment will
+ * overwrite that, so we make sure that .user gets overwritten with
+ * what it already has.
+ */
+ save = lp->user[0];
+ *lp = ((struct uml_net_private)
+ { .list = LIST_HEAD_INIT(lp->list),
+ .dev = dev,
+ .fd = -1,
+ .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},
+ .have_mac = device->have_mac,
+ .protocol = transport->kern->protocol,
+ .open = transport->user->open,
+ .close = transport->user->close,
+ .remove = transport->user->remove,
+ .read = transport->kern->read,
+ .write = transport->kern->write,
+ .add_address = transport->user->add_address,
+ .delete_address = transport->user->delete_address,
+ .set_mtu = transport->user->set_mtu,
+ .user = { save } });
+
+ init_timer(&lp->tl);
+ spin_lock_init(&lp->lock);
+ lp->tl.function = uml_net_user_timer_expire;
+ if (lp->have_mac)
+ memcpy(lp->mac, device->mac, sizeof(lp->mac));
+
+ if (transport->user->init)
+ (*transport->user->init)(&lp->user, dev);
+
+ if (device->have_mac)
+ set_ether_mac(dev, device->mac);
+
+ spin_lock(&opened_lock);
+ list_add(&lp->list, &opened);
+ spin_unlock(&opened_lock);
+
+ return(0);
+}
+
+static struct uml_net *find_device(int n)
+{
+ struct uml_net *device;
+ struct list_head *ele;
+
+ spin_lock(&devices_lock);
+ list_for_each(ele, &devices){
+ device = list_entry(ele, struct uml_net, list);
+ if(device->index == n)
+ goto out;
+ }
+ device = NULL;
+ out:
+ spin_unlock(&devices_lock);
+ return(device);
+}
+
+static int eth_parse(char *str, int *index_out, char **str_out)
+{
+ char *end;
+ int n;
+
+ n = simple_strtoul(str, &end, 0);
+ if(end == str){
+ printk(KERN_ERR "eth_setup: Failed to parse '%s'\n", str);
+ return(1);
+ }
+ if(n < 0){
+ printk(KERN_ERR "eth_setup: device %d is negative\n", n);
+ return(1);
+ }
+ str = end;
+ if(*str != '='){
+ printk(KERN_ERR
+ "eth_setup: expected '=' after device number\n");
+ return(1);
+ }
+ str++;
+ if(find_device(n)){
+ printk(KERN_ERR "eth_setup: Device %d already configured\n",
+ n);
+ return(1);
+ }
+ if(index_out) *index_out = n;
+ *str_out = str;
+ return(0);
+}
+
+struct eth_init {
+ struct list_head list;
+ char *init;
+ int index;
+};
+
+/* Filled in at boot time. Will need locking if the transports become
+ * modular.
+ */
+struct list_head transports = LIST_HEAD_INIT(transports);
+
+/* Filled in during early boot */
+struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line);
+
+static int check_transport(struct transport *transport, char *eth, int n,
+ void **init_out, char **mac_out)
+{
+ int len;
+
+ len = strlen(transport->name);
+ if(strncmp(eth, transport->name, len))
+ return(0);
+
+ eth += len;
+ if(*eth == ',')
+ eth++;
+ else if(*eth != '\0')
+ return(0);
+
+ *init_out = kmalloc(transport->setup_size, GFP_KERNEL);
+ if(*init_out == NULL)
+ return(1);
+
+ if(!transport->setup(eth, mac_out, *init_out)){
+ kfree(*init_out);
+ *init_out = NULL;
+ }
+ return(1);
+}
+
+void register_transport(struct transport *new)
+{
+ struct list_head *ele, *next;
+ struct eth_init *eth;
+ void *init;
+ char *mac = NULL;
+ int match;
+
+ list_add(&new->list, &transports);
+
+ list_for_each_safe(ele, next, &eth_cmd_line){
+ eth = list_entry(ele, struct eth_init, list);
+ match = check_transport(new, eth->init, eth->index, &init,
+ &mac);
+ if(!match)
+ continue;
+ else if(init != NULL){
+ eth_configure(eth->index, init, mac, new);
+ kfree(init);
+ }
+ list_del(&eth->list);
+ }
+}
+
+static int eth_setup_common(char *str, int index)
+{
+ struct list_head *ele;
+ struct transport *transport;
+ void *init;
+ char *mac = NULL;
+
+ list_for_each(ele, &transports){
+ transport = list_entry(ele, struct transport, list);
+ if(!check_transport(transport, str, index, &init, &mac))
+ continue;
+ if(init != NULL){
+ eth_configure(index, init, mac, transport);
+ kfree(init);
+ }
+ return(1);
+ }
+ return(0);
+}
+
+static int eth_setup(char *str)
+{
+ struct eth_init *new;
+ int n, err;
+
+ err = eth_parse(str, &n, &str);
+ if(err) return(1);
+
+ new = alloc_bootmem(sizeof(new));
+ if (new == NULL){
+ printk("eth_init : alloc_bootmem failed\n");
+ return(1);
+ }
+
+ INIT_LIST_HEAD(&new->list);
+ new->index = n;
+ new->init = str;
+
+ list_add_tail(&new->list, &eth_cmd_line);
+ return(1);
+}
+
+__setup("eth", eth_setup);
+__uml_help(eth_setup,
+"eth[0-9]+=<transport>,<options>\n"
+" Configure a network device.\n\n"
+);
+
+#if 0
+static int eth_init(void)
+{
+ struct list_head *ele, *next;
+ struct eth_init *eth;
+
+ list_for_each_safe(ele, next, &eth_cmd_line){
+ eth = list_entry(ele, struct eth_init, list);
+
+ if(eth_setup_common(eth->init, eth->index))
+ list_del(&eth->list);
+ }
+
+ return(1);
+}
+__initcall(eth_init);
+#endif
+
+static int net_config(char *str)
+{
+ int n, err;
+
+ err = eth_parse(str, &n, &str);
+ if(err) return(err);
+
+ str = uml_strdup(str);
+ if(str == NULL){
+ printk(KERN_ERR "net_config failed to strdup string\n");
+ return(-1);
+ }
+ err = !eth_setup_common(str, n);
+ if(err)
+ kfree(str);
+ return(err);
+}
+
+static int net_remove(char *str)
+{
+ struct uml_net *device;
+ struct net_device *dev;
+ struct uml_net_private *lp;
+ char *end;
+ int n;
+
+ n = simple_strtoul(str, &end, 0);
+ if((*end != '\0') || (end == str))
+ return(-1);
+
+ device = find_device(n);
+ if(device == NULL)
+ return(0);
+
+ dev = device->dev;
+ lp = dev->priv;
+ if(lp->fd > 0) return(-1);
+ if(lp->remove != NULL) (*lp->remove)(&lp->user);
+ unregister_netdev(dev);
+ platform_device_unregister(&device->pdev);
+
+ list_del(&device->list);
+ kfree(device);
+ free_netdev(dev);
+ return(0);
+}
+
+static struct mc_device net_mc = {
+ .name = "eth",
+ .config = net_config,
+ .get_config = NULL,
+ .remove = net_remove,
+};
+
+static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct in_ifaddr *ifa = ptr;
+ u32 addr = ifa->ifa_address;
+ u32 netmask = ifa->ifa_mask;
+ struct net_device *dev = ifa->ifa_dev->dev;
+ struct uml_net_private *lp;
+ void (*proc)(unsigned char *, unsigned char *, void *);
+ unsigned char addr_buf[4], netmask_buf[4];
+
+ if(dev->open != uml_net_open) return(NOTIFY_DONE);
+
+ lp = dev->priv;
+
+ proc = NULL;
+ switch (event){
+ case NETDEV_UP:
+ proc = lp->add_address;
+ break;
+ case NETDEV_DOWN:
+ proc = lp->delete_address;
+ break;
+ }
+ if(proc != NULL){
+ addr_buf[0] = addr & 0xff;
+ addr_buf[1] = (addr >> 8) & 0xff;
+ addr_buf[2] = (addr >> 16) & 0xff;
+ addr_buf[3] = addr >> 24;
+ netmask_buf[0] = netmask & 0xff;
+ netmask_buf[1] = (netmask >> 8) & 0xff;
+ netmask_buf[2] = (netmask >> 16) & 0xff;
+ netmask_buf[3] = netmask >> 24;
+ (*proc)(addr_buf, netmask_buf, &lp->user);
+ }
+ return(NOTIFY_DONE);
+}
+
+struct notifier_block uml_inetaddr_notifier = {
+ .notifier_call = uml_inetaddr_event,
+};
+
+static int uml_net_init(void)
+{
+ struct list_head *ele;
+ struct uml_net_private *lp;
+ struct in_device *ip;
+ struct in_ifaddr *in;
+
+ mconsole_register_dev(&net_mc);
+ register_inetaddr_notifier(&uml_inetaddr_notifier);
+
+ /* Devices may have been opened already, so the uml_inetaddr_notifier
+ * didn't get a chance to run for them. This fakes it so that
+ * addresses which have already been set up get handled properly.
+ */
+ list_for_each(ele, &opened){
+ lp = list_entry(ele, struct uml_net_private, list);
+ ip = lp->dev->ip_ptr;
+ if(ip == NULL) continue;
+ in = ip->ifa_list;
+ while(in != NULL){
+ uml_inetaddr_event(NULL, NETDEV_UP, in);
+ in = in->ifa_next;
+ }
+ }
+
+ return(0);
+}
+
+__initcall(uml_net_init);
+
+static void close_devices(void)
+{
+ struct list_head *ele;
+ struct uml_net_private *lp;
+
+ list_for_each(ele, &opened){
+ lp = list_entry(ele, struct uml_net_private, list);
+ if((lp->close != NULL) && (lp->fd >= 0))
+ (*lp->close)(lp->fd, &lp->user);
+ if(lp->remove != NULL) (*lp->remove)(&lp->user);
+ }
+}
+
+__uml_exitcall(close_devices);
+
+int setup_etheraddr(char *str, unsigned char *addr)
+{
+ char *end;
+ int i;
+
+ if(str == NULL)
+ return(0);
+ for(i=0;i<6;i++){
+ addr[i] = simple_strtoul(str, &end, 16);
+ if((end == str) ||
+ ((*end != ':') && (*end != ',') && (*end != '\0'))){
+ printk(KERN_ERR
+ "setup_etheraddr: failed to parse '%s' "
+ "as an ethernet address\n", str);
+ return(0);
+ }
+ str = end + 1;
+ }
+ if(addr[0] & 1){
+ printk(KERN_ERR
+ "Attempt to assign a broadcast ethernet address to a "
+ "device disallowed\n");
+ return(0);
+ }
+ return(1);
+}
+
+void dev_ip_addr(void *d, char *buf, char *bin_buf)
+{
+ struct net_device *dev = d;
+ struct in_device *ip = dev->ip_ptr;
+ struct in_ifaddr *in;
+ u32 addr;
+
+ if((ip == NULL) || ((in = ip->ifa_list) == NULL)){
+ printk(KERN_WARNING "dev_ip_addr - device not assigned an "
+ "IP address\n");
+ return;
+ }
+ addr = in->ifa_address;
+ sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff,
+ (addr >> 16) & 0xff, addr >> 24);
+ if(bin_buf){
+ bin_buf[0] = addr & 0xff;
+ bin_buf[1] = (addr >> 8) & 0xff;
+ bin_buf[2] = (addr >> 16) & 0xff;
+ bin_buf[3] = addr >> 24;
+ }
+}
+
+void set_ether_mac(void *d, unsigned char *addr)
+{
+ struct net_device *dev = d;
+
+ memcpy(dev->dev_addr, addr, ETH_ALEN);
+}
+
+struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra)
+{
+ if((skb != NULL) && (skb_tailroom(skb) < extra)){
+ struct sk_buff *skb2;
+
+ skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC);
+ dev_kfree_skb(skb);
+ skb = skb2;
+ }
+ if(skb != NULL) skb_put(skb, extra);
+ return(skb);
+}
+
+void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *,
+ void *),
+ void *arg)
+{
+ struct net_device *dev = d;
+ struct in_device *ip = dev->ip_ptr;
+ struct in_ifaddr *in;
+ unsigned char address[4], netmask[4];
+
+ if(ip == NULL) return;
+ in = ip->ifa_list;
+ while(in != NULL){
+ address[0] = in->ifa_address & 0xff;
+ address[1] = (in->ifa_address >> 8) & 0xff;
+ address[2] = (in->ifa_address >> 16) & 0xff;
+ address[3] = in->ifa_address >> 24;
+ netmask[0] = in->ifa_mask & 0xff;
+ netmask[1] = (in->ifa_mask >> 8) & 0xff;
+ netmask[2] = (in->ifa_mask >> 16) & 0xff;
+ netmask[3] = in->ifa_mask >> 24;
+ (*cb)(address, netmask, arg);
+ in = in->ifa_next;
+ }
+}
+
+int dev_netmask(void *d, void *m)
+{
+ struct net_device *dev = d;
+ struct in_device *ip = dev->ip_ptr;
+ struct in_ifaddr *in;
+ __u32 *mask_out = m;
+
+ if(ip == NULL)
+ return(1);
+
+ in = ip->ifa_list;
+ if(in == NULL)
+ return(1);
+
+ *mask_out = in->ifa_mask;
+ return(0);
+}
+
+void *get_output_buffer(int *len_out)
+{
+ void *ret;
+
+ ret = (void *) __get_free_pages(GFP_KERNEL, 0);
+ if(ret) *len_out = PAGE_SIZE;
+ else *len_out = 0;
+ return(ret);
+}
+
+void free_output_buffer(void *buffer)
+{
+ free_pages((unsigned long) buffer, 0);
+}
+
+int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out,
+ char **gate_addr)
+{
+ char *remain;
+
+ remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL);
+ if(remain != NULL){
+ printk("tap_setup_common - Extra garbage on specification : "
+ "'%s'\n", remain);
+ return(1);
+ }
+
+ return(0);
+}
+
+unsigned short eth_protocol(struct sk_buff *skb)
+{
+ return(eth_type_trans(skb, skb->dev));
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 22:30:40 +0000