Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 330 insertions, 0 deletions

diff --git a/drivers/net/wan/hdlc_cisco.c b/drivers/net/wan/hdlc_cisco.c
new file mode 100644
index 000000000000..c1b6896d7007
--- /dev/null
+++ b/drivers/net/wan/hdlc_cisco.c
@@ -0,0 +1,330 @@
+/*
+ * Generic HDLC support routines for Linux
+ * Cisco HDLC support
+ *
+ * Copyright (C) 2000 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/pkt_sched.h>
+#include <linux/inetdevice.h>
+#include <linux/lapb.h>
+#include <linux/rtnetlink.h>
+#include <linux/hdlc.h>
+
+#undef DEBUG_HARD_HEADER
+
+#define CISCO_MULTICAST         0x8F    /* Cisco multicast address */
+#define CISCO_UNICAST           0x0F    /* Cisco unicast address */
+#define CISCO_KEEPALIVE         0x8035  /* Cisco keepalive protocol */
+#define CISCO_SYS_INFO          0x2000  /* Cisco interface/system info */
+#define CISCO_ADDR_REQ          0       /* Cisco address request */
+#define CISCO_ADDR_REPLY        1       /* Cisco address reply */
+#define CISCO_KEEPALIVE_REQ     2       /* Cisco keepalive request */
+
+
+static int cisco_hard_header(struct sk_buff *skb, struct net_device *dev,
+                             u16 type, void *daddr, void *saddr,
+                             unsigned int len)
+{
+        hdlc_header *data;
+#ifdef DEBUG_HARD_HEADER
+        printk(KERN_DEBUG "%s: cisco_hard_header called\n", dev->name);
+#endif
+
+        skb_push(skb, sizeof(hdlc_header));
+        data = (hdlc_header*)skb->data;
+        if (type == CISCO_KEEPALIVE)
+                data->address = CISCO_MULTICAST;
+        else
+                data->address = CISCO_UNICAST;
+        data->control = 0;
+        data->protocol = htons(type);
+
+        return sizeof(hdlc_header);
+}
+
+
+
+static void cisco_keepalive_send(struct net_device *dev, u32 type,
+                                 u32 par1, u32 par2)
+{
+        struct sk_buff *skb;
+        cisco_packet *data;
+
+        skb = dev_alloc_skb(sizeof(hdlc_header) + sizeof(cisco_packet));
+        if (!skb) {
+                printk(KERN_WARNING
+                       "%s: Memory squeeze on cisco_keepalive_send()\n",
+                       dev->name);
+                return;
+        }
+        skb_reserve(skb, 4);
+        cisco_hard_header(skb, dev, CISCO_KEEPALIVE, NULL, NULL, 0);
+        data = (cisco_packet*)skb->tail;
+
+        data->type = htonl(type);
+        data->par1 = htonl(par1);
+        data->par2 = htonl(par2);
+        data->rel = 0xFFFF;
+        /* we will need do_div here if 1000 % HZ != 0 */
+        data->time = htonl((jiffies - INITIAL_JIFFIES) * (1000 / HZ));
+
+        skb_put(skb, sizeof(cisco_packet));
+        skb->priority = TC_PRIO_CONTROL;
+        skb->dev = dev;
+        skb->nh.raw = skb->data;
+
+        dev_queue_xmit(skb);
+}
+
+
+
+static unsigned short cisco_type_trans(struct sk_buff *skb,
+                                       struct net_device *dev)
+{
+        hdlc_header *data = (hdlc_header*)skb->data;
+
+        if (skb->len < sizeof(hdlc_header))
+                return __constant_htons(ETH_P_HDLC);
+
+        if (data->address != CISCO_MULTICAST &&
+            data->address != CISCO_UNICAST)
+                return __constant_htons(ETH_P_HDLC);
+
+        switch(data->protocol) {
+        case __constant_htons(ETH_P_IP):
+        case __constant_htons(ETH_P_IPX):
+        case __constant_htons(ETH_P_IPV6):
+                skb_pull(skb, sizeof(hdlc_header));
+                return data->protocol;
+        default:
+                return __constant_htons(ETH_P_HDLC);
+        }
+}
+
+
+static int cisco_rx(struct sk_buff *skb)
+{
+        struct net_device *dev = skb->dev;
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        hdlc_header *data = (hdlc_header*)skb->data;
+        cisco_packet *cisco_data;
+        struct in_device *in_dev;
+        u32 addr, mask;
+
+        if (skb->len < sizeof(hdlc_header))
+                goto rx_error;
+
+        if (data->address != CISCO_MULTICAST &&
+            data->address != CISCO_UNICAST)
+                goto rx_error;
+
+        switch(ntohs(data->protocol)) {
+        case CISCO_SYS_INFO:
+                /* Packet is not needed, drop it. */
+                dev_kfree_skb_any(skb);
+                return NET_RX_SUCCESS;
+
+        case CISCO_KEEPALIVE:
+                if (skb->len != sizeof(hdlc_header) + CISCO_PACKET_LEN &&
+                    skb->len != sizeof(hdlc_header) + CISCO_BIG_PACKET_LEN) {
+                        printk(KERN_INFO "%s: Invalid length of Cisco "
+                               "control packet (%d bytes)\n",
+                               dev->name, skb->len);
+                        goto rx_error;
+                }
+
+                cisco_data = (cisco_packet*)(skb->data + sizeof(hdlc_header));
+
+                switch(ntohl (cisco_data->type)) {
+                case CISCO_ADDR_REQ: /* Stolen from syncppp.c :-) */
+                        in_dev = dev->ip_ptr;
+                        addr = 0;
+                        mask = ~0; /* is the mask correct? */
+
+                        if (in_dev != NULL) {
+                                struct in_ifaddr **ifap = &in_dev->ifa_list;
+
+                                while (*ifap != NULL) {
+                                        if (strcmp(dev->name,
+                                                   (*ifap)->ifa_label) == 0) {
+                                                addr = (*ifap)->ifa_local;
+                                                mask = (*ifap)->ifa_mask;
+                                                break;
+                                        }
+                                        ifap = &(*ifap)->ifa_next;
+                                }
+
+                                cisco_keepalive_send(dev, CISCO_ADDR_REPLY,
+                                                     addr, mask);
+                        }
+                        dev_kfree_skb_any(skb);
+                        return NET_RX_SUCCESS;
+
+                case CISCO_ADDR_REPLY:
+                        printk(KERN_INFO "%s: Unexpected Cisco IP address "
+                               "reply\n", dev->name);
+                        goto rx_error;
+
+                case CISCO_KEEPALIVE_REQ:
+                        hdlc->state.cisco.rxseq = ntohl(cisco_data->par1);
+                        if (hdlc->state.cisco.request_sent &&
+                            ntohl(cisco_data->par2)==hdlc->state.cisco.txseq) {
+                                hdlc->state.cisco.last_poll = jiffies;
+                                if (!hdlc->state.cisco.up) {
+                                        u32 sec, min, hrs, days;
+                                        sec = ntohl(cisco_data->time) / 1000;
+                                        min = sec / 60; sec -= min * 60;
+                                        hrs = min / 60; min -= hrs * 60;
+                                        days = hrs / 24; hrs -= days * 24;
+                                        printk(KERN_INFO "%s: Link up (peer "
+                                               "uptime %ud%uh%um%us)\n",
+                                               dev->name, days, hrs,
+                                               min, sec);
+                                        netif_carrier_on(dev);
+                                        hdlc->state.cisco.up = 1;
+                                }
+                        }
+
+                        dev_kfree_skb_any(skb);
+                        return NET_RX_SUCCESS;
+                } /* switch(keepalive type) */
+        } /* switch(protocol) */
+
+        printk(KERN_INFO "%s: Unsupported protocol %x\n", dev->name,
+               data->protocol);
+        dev_kfree_skb_any(skb);
+        return NET_RX_DROP;
+
+ rx_error:
+        hdlc->stats.rx_errors++; /* Mark error */
+        dev_kfree_skb_any(skb);
+        return NET_RX_DROP;
+}
+
+
+
+static void cisco_timer(unsigned long arg)
+{
+        struct net_device *dev = (struct net_device *)arg;
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+
+        if (hdlc->state.cisco.up &&
+            time_after(jiffies, hdlc->state.cisco.last_poll +
+                       hdlc->state.cisco.settings.timeout * HZ)) {
+                hdlc->state.cisco.up = 0;
+                printk(KERN_INFO "%s: Link down\n", dev->name);
+                netif_carrier_off(dev);
+        }
+
+        cisco_keepalive_send(dev, CISCO_KEEPALIVE_REQ,
+                             ++hdlc->state.cisco.txseq,
+                             hdlc->state.cisco.rxseq);
+        hdlc->state.cisco.request_sent = 1;
+        hdlc->state.cisco.timer.expires = jiffies +
+                hdlc->state.cisco.settings.interval * HZ;
+        hdlc->state.cisco.timer.function = cisco_timer;
+        hdlc->state.cisco.timer.data = arg;
+        add_timer(&hdlc->state.cisco.timer);
+}
+
+
+
+static void cisco_start(struct net_device *dev)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        hdlc->state.cisco.up = 0;
+        hdlc->state.cisco.request_sent = 0;
+        hdlc->state.cisco.txseq = hdlc->state.cisco.rxseq = 0;
+
+        init_timer(&hdlc->state.cisco.timer);
+        hdlc->state.cisco.timer.expires = jiffies + HZ; /*First poll after 1s*/
+        hdlc->state.cisco.timer.function = cisco_timer;
+        hdlc->state.cisco.timer.data = (unsigned long)dev;
+        add_timer(&hdlc->state.cisco.timer);
+}
+
+
+
+static void cisco_stop(struct net_device *dev)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        del_timer_sync(&hdlc->state.cisco.timer);
+        if (netif_carrier_ok(dev))
+                netif_carrier_off(dev);
+        hdlc->state.cisco.up = 0;
+        hdlc->state.cisco.request_sent = 0;
+}
+
+
+
+int hdlc_cisco_ioctl(struct net_device *dev, struct ifreq *ifr)
+{
+        cisco_proto __user *cisco_s = ifr->ifr_settings.ifs_ifsu.cisco;
+        const size_t size = sizeof(cisco_proto);
+        cisco_proto new_settings;
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        int result;
+
+        switch (ifr->ifr_settings.type) {
+        case IF_GET_PROTO:
+                ifr->ifr_settings.type = IF_PROTO_CISCO;
+                if (ifr->ifr_settings.size < size) {
+                        ifr->ifr_settings.size = size; /* data size wanted */
+                        return -ENOBUFS;
+                }
+                if (copy_to_user(cisco_s, &hdlc->state.cisco.settings, size))
+                        return -EFAULT;
+                return 0;
+
+        case IF_PROTO_CISCO:
+                if(!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+
+                if(dev->flags & IFF_UP)
+                        return -EBUSY;
+
+                if (copy_from_user(&new_settings, cisco_s, size))
+                        return -EFAULT;
+
+                if (new_settings.interval < 1 ||
+                    new_settings.timeout < 2)
+                        return -EINVAL;
+
+                result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
+
+                if (result)
+                        return result;
+
+                hdlc_proto_detach(hdlc);
+                memcpy(&hdlc->state.cisco.settings, &new_settings, size);
+                memset(&hdlc->proto, 0, sizeof(hdlc->proto));
+
+                hdlc->proto.start = cisco_start;
+                hdlc->proto.stop = cisco_stop;
+                hdlc->proto.netif_rx = cisco_rx;
+                hdlc->proto.type_trans = cisco_type_trans;
+                hdlc->proto.id = IF_PROTO_CISCO;
+                dev->hard_start_xmit = hdlc->xmit;
+                dev->hard_header = cisco_hard_header;
+                dev->hard_header_cache = NULL;
+                dev->type = ARPHRD_CISCO;
+                dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+                dev->addr_len = 0;
+                return 0;
+        }
+
+        return -EINVAL;
+}