+++ /dev/null
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/netdevice.h> /* struct device, and other headers */
-#include <linux/etherdevice.h> /* eth_type_trans */
-#include <linux/ip.h> /* struct iphdr */
-#include <linux/ipv6.h> /* struct ipv6hdr */
-#include <linux/in.h>
-
-#include "smskdefs.h" // page, scatterlist, kmutex
-#include "smscoreapi.h"
-#include "smstypes.h"
-
-#define IPV4VERSION 0x40
-#define IPV6VERSION 0x60
-#define GETIPVERSION(_x_) ((_x_) & 0xf0)
-
-typedef struct _smsnet_client
-{
- struct list_head entry;
-
- smscore_device_t *coredev;
- smscore_client_t *smsclient;
-
- int packet_length, splitpacket_length;
- int header_length, splitheader_length;
- u8 splitpacket[ETH_DATA_LEN];
-} smsnet_client_t;
-
-struct list_head g_smsnet_clients;
-kmutex_t g_smsnet_clientslock;
-
-struct net_device *g_smsnet_device = NULL;
-struct net_device_stats g_smsnet_stats;
-
-int g_smsnet_inuse = 0;
-
-void smsnet_send_packet(u8* buffer, int length)
-{
- u8 *eth;
- struct sk_buff *skb = dev_alloc_skb(length + ETH_HLEN + NET_IP_ALIGN);
-
- if (!skb)
- {
- g_smsnet_stats.rx_dropped++;
- return;
- }
-
- skb_reserve(skb, NET_IP_ALIGN);
-
- eth = (u8 *) skb_put(skb, length + ETH_HLEN);
- memcpy(eth + ETH_HLEN, buffer, length);
-
- eth[6] = 0;
- eth[7] = 1;
- eth[8] = 1;
- eth[9] = 3;
- eth[10] = 4;
- eth[11] = 5;
-
- if (GETIPVERSION(*buffer) == IPV4VERSION)
- {
- eth[0] = 1;
- eth[1] = 0;
- eth[2] = 0x5e;
- eth[3] = buffer[17] & 0x7f;
- eth[4] = buffer[18];
- eth[5] = buffer[19];
-
- eth[12] = 0x08;
- eth[13] = 0x00;
- }
- else
- {
- // todo: ip6 mcast address
-
- eth[12] = 0x86;
- eth[13] = 0xdd;
- }
-
- skb->dev = g_smsnet_device;
- skb->protocol = eth_type_trans(skb, g_smsnet_device);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- g_smsnet_stats.rx_packets ++;
- g_smsnet_stats.rx_bytes += skb->len;
-
- netif_rx(skb);
-}
-
-int check_header(smsnet_client_t* client, u8* buffer)
-{
- struct iphdr *ip4_hdr;
- struct ipv6hdr *ip6_hdr;
- struct udphdr *udp_hdr;
- u16 csum;
-
- // check if packet header is valid and it is a UDP
- if (GETIPVERSION(*buffer) == IPV4VERSION)
- {
- ip4_hdr = (struct iphdr*) buffer;
- csum = ip4_hdr->check;
-
- ip4_hdr->check = 0;
-
- // check header checksum for IPv4 packets
- if(ip4_hdr->protocol != IPPROTO_UDP || csum != ip_fast_csum(buffer, ip4_hdr->ihl))
- {
- ip4_hdr->check = csum;
- return 0;
- }
-
- ip4_hdr->check = csum;
- client->packet_length = ntohs(ip4_hdr->tot_len);
- }
- else
- {
- ip6_hdr = (struct ipv6hdr *) buffer;
- udp_hdr = (struct udphdr *)(ip6_hdr + 1);
-
- if ((ip6_hdr->nexthdr != IPPROTO_UDP) ||
- (ip6_hdr->payload_len != udp_hdr->len))
- {
- return 0;
- }
-
- client->packet_length = ntohs(ip6_hdr->payload_len) + sizeof(struct ipv6hdr);
- }
-
- // check for abnormal packet length
- if (client->packet_length > ETH_DATA_LEN)
- return 0;
-
- return 1;
-}
-
-int smsnet_onresponse(void *context, smscore_buffer_t *cb)
-{
- smsnet_client_t *client = (smsnet_client_t *) context;
- int length, rest;
- u8 ip_ver, *buffer;
-
- buffer = ((u8*) cb->p) + cb->offset + sizeof(SmsMsgHdr_ST);
- length = cb->size - sizeof(SmsMsgHdr_ST);
-
- if (client->splitheader_length)
- {
- // how much data is missing ?
- rest = client->header_length - client->splitheader_length;
-
- // do we have enough in this buffer ?
- rest = min(rest, length);
-
- memcpy(&client->splitpacket[client->splitheader_length], buffer, rest);
-
- client->splitheader_length += rest;
-
- if (client->splitheader_length != client->header_length)
- goto exit;
-
- if (check_header(client, client->splitpacket))
- {
- buffer += rest;
- length -= rest;
-
- client->splitpacket_length = client->header_length;
- }
-
- client->splitheader_length = 0;
- }
-
- if (client->splitpacket_length)
- {
- // how much data is missing ?
- rest = client->packet_length - client->splitpacket_length;
-
- // do we have enough in this buffer ?
- rest = min(rest, length);
-
- memcpy(&client->splitpacket[client->splitpacket_length], buffer, rest);
-
- client->splitpacket_length += rest;
-
- if (client->splitpacket_length != client->packet_length)
- goto exit;
-
- client->splitpacket_length = 0;
-
- smsnet_send_packet(client->splitpacket, client->packet_length);
-
- buffer += rest;
- length -= rest;
- }
-
- while (length > 0)
- {
- ip_ver = GETIPVERSION(*buffer);
- while (length && (ip_ver != IPV4VERSION) && (ip_ver != IPV6VERSION))
- {
- buffer++;
- length--;
- ip_ver = GETIPVERSION(*buffer);
- }
-
- // No more data in section
- if (!length)
- break;
-
- // Set the header length at start of packet according to the version
- // no problem with the IP header cast, since we have at least 1 byte (we use only the first byte)
- client->header_length = (ip_ver == IPV4VERSION) ? (((struct iphdr *) buffer)->ihl * 4) : (sizeof(struct ipv6hdr) + sizeof(struct udphdr));
-
- // Check that Header length is at least 20 (min IPv4 length)
- if (client->header_length < 20)
- {
- length--;
- buffer++;
- continue;
- }
-
- // check split header case
- if (client->header_length > length)
- {
- memcpy(client->splitpacket, buffer, length);
- client->splitheader_length = length;
- break;
- }
-
- if (check_header(client, buffer))
- {
- // check split packet case
- if (client->packet_length > length)
- {
- memcpy(client->splitpacket, buffer, length);
- client->splitpacket_length = length;
- break;
- }
- }
- else
- {
- length --;
- buffer ++;
- continue;
- }
-
- smsnet_send_packet(buffer, client->packet_length);
-
- buffer += client->packet_length;
- length -= client->packet_length;
- }
-
-exit:
- smscore_putbuffer(client->coredev, cb);
-
- return 0;
-}
-
-void smsnet_unregister_client(smsnet_client_t* client)
-{
- // must be called under clientslock
-
- list_del(&client->entry);
-
- smscore_unregister_client(client->smsclient);
- kfree(client);
-}
-
-void smsnet_onremove(void *context)
-{
- kmutex_lock(&g_smsnet_clientslock);
-
- smsnet_unregister_client((smsnet_client_t*) context);
-
- kmutex_unlock(&g_smsnet_clientslock);
-}
-
-int smsnet_hotplug(smscore_device_t *coredev, struct device* device, int arrival)
-{
- smsclient_params_t params;
- smsnet_client_t* client;
- int rc;
-
- // device removal handled by onremove callback
- if (!arrival)
- return 0;
-
- client = kzalloc(sizeof(smsnet_client_t), GFP_KERNEL);
- if (!client)
- {
- printk(KERN_INFO "%s kmalloc() failed\n", __FUNCTION__);
- return -ENOMEM;
- }
-
- params.initial_id = 0;
- params.data_type = MSG_SMS_DATA_MSG;
- params.onresponse_handler = smsnet_onresponse;
- params.onremove_handler = smsnet_onremove;
- params.context = client;
-
- rc = smscore_register_client(coredev, ¶ms, &client->smsclient);
- if (rc < 0)
- {
- printk(KERN_INFO "%s smscore_register_client() failed %d\n", __FUNCTION__, rc);
- kfree(client);
- return rc;
- }
-
- client->coredev = coredev;
-
- kmutex_lock(&g_smsnet_clientslock);
-
- list_add(&client->entry, &g_smsnet_clients);
-
- kmutex_unlock(&g_smsnet_clientslock);
-
- printk(KERN_INFO "%s success\n", __FUNCTION__);
-
- return 0;
-}
-
-static int smsnet_open(struct net_device *dev)
-{
- g_smsnet_inuse ++;
-
- netif_start_queue(dev);
-
- printk(KERN_INFO "%s, %d\n", __FUNCTION__, g_smsnet_inuse);
-
- return 0;
-}
-
-static int smsnet_stop(struct net_device *dev)
-{
- netif_stop_queue(dev);
-
- g_smsnet_inuse --;
-
- printk(KERN_INFO "%s, %d\n", __FUNCTION__, g_smsnet_inuse);
-
- return 0;
-}
-
-static int smsnet_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- printk(KERN_INFO "%s\n", __FUNCTION__);
-
- dev_kfree_skb(skb);
- return 0;
-}
-
-static struct net_device_stats * smsnet_get_stats(struct net_device *dev)
-{
- return &g_smsnet_stats;
-}
-
-static void smsnet_set_multicast_list(struct net_device *dev)
-{
- printk(KERN_INFO "%s %d\n", __FUNCTION__, dev->mc_count);
- if (dev->mc_count)
- {
- struct dev_mc_list *p;
-
- for (p = dev->mc_list; p; p = p->next)
- printk(KERN_INFO "%s %d %02x %02x %02x %02x %02x %02x %02x %02x\n", __FUNCTION__, p->dmi_addrlen,
- p->dmi_addr[0], p->dmi_addr[1], p->dmi_addr[2], p->dmi_addr[3],
- p->dmi_addr[4], p->dmi_addr[5], p->dmi_addr[6], p->dmi_addr[7]
- );
- }
-}
-
-static void smsnet_setup_device(struct net_device *dev)
-{
- ether_setup(dev);
-
- dev->open = smsnet_open;
- dev->stop = smsnet_stop;
- dev->hard_start_xmit = smsnet_hard_start_xmit;
- dev->get_stats = smsnet_get_stats;
- dev->set_multicast_list = smsnet_set_multicast_list;
-
- dev->mc_count = 0;
- dev->hard_header_cache = NULL;
-
- memcpy(dev->dev_addr, "\0SIANO", ETH_ALEN);
-
- dev->flags |= IFF_NOARP;
- dev->features |= NETIF_F_NO_CSUM;
-}
-
-int smsnet_module_init(void)
-{
- int rc;
-
- INIT_LIST_HEAD(&g_smsnet_clients);
- kmutex_init(&g_smsnet_clientslock);
-
- memset(&g_smsnet_stats, 0, sizeof(g_smsnet_stats));
-
- g_smsnet_device = alloc_netdev(0, "sms", smsnet_setup_device);
- if (!g_smsnet_device)
- {
- printk(KERN_INFO "%s alloc_netdev() failed\n", __FUNCTION__);
- return -ENOMEM;
- }
-
- rc = register_netdev(g_smsnet_device);
- if (rc < 0)
- {
- printk(KERN_INFO "%s register_netdev() failed %d\n", __FUNCTION__, rc);
- free_netdev(g_smsnet_device);
- return rc;
- }
-
- rc = smscore_register_hotplug(smsnet_hotplug);
-
- printk(KERN_INFO "%s, rc %d\n", __FUNCTION__, rc);
-
- return rc;
-}
-
-void smsnet_module_exit(void)
-{
- if (g_smsnet_device)
- {
- unregister_netdev(g_smsnet_device);
- free_netdev(g_smsnet_device);
-
- g_smsnet_device = NULL;
- }
-
- smscore_unregister_hotplug(smsnet_hotplug);
-
- kmutex_lock(&g_smsnet_clientslock);
-
- while (!list_empty(&g_smsnet_clients))
- smsnet_unregister_client((smsnet_client_t*) g_smsnet_clients.next);
-
- kmutex_unlock(&g_smsnet_clientslock);
-
- printk(KERN_INFO "%s\n", __FUNCTION__);
-}
-
-module_init(smsnet_module_init);
-module_exit(smsnet_module_exit);
-
-MODULE_DESCRIPTION("smsnet dvb-h ip sink module");
-MODULE_AUTHOR("Anatoly Greenblatt,,, (anatolyg@siano-ms.com)");
-MODULE_LICENSE("GPL");
projects / linux-2.6 / commitdiff