+#define DEBUG
+
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/wait.h>
#include <linux/netdevice.h>
#include <linux/socket.h>
+#include <linux/if_arp.h>
#include <linux/net.h>
+#include <linux/netdevice.h>
#include <linux/can/core.h>
#include <linux/can.h>
#include <net/rtnetlink.h>
#include "canethgw.h"
#include <linux/completion.h>
#include <linux/mutex.h>
+#include <linux/miscdevice.h>
#include <net/inet_common.h>
-/**
- * ToDo:
- * [ ] encapsule module - check inputs
- * [ ] refactor - chc .h
- * [ ] dump callback
- * [ ] rtnl vs nl functions
- * [ ] stop threads
- * [ ] change listening
- * [ ] clean exit - threads, jobs
- */
-
-MODULE_LICENSE( "GPL" );
-
-static int gw_udp_recv( void* data );
-static void gw_udp_send( struct can_frame* cf, struct in_addr ipaddr, u16 port );
-static int gw_can_recv( void* data );
-static void gw_can_send( struct can_frame* cf, int ifidx );
-static void cegw_thread_start( void );
-static void cegw_thread_stop( void );
-static int cegw_thread_restart( void* arg );
+MODULE_LICENSE("GPL");
-#define CEGW_STOPPED 0
-#define CEGW_RUNNING 1
+static int cegw_udp2can(void *data);
+static void cegw_udp_send(struct socket *udp_sock, struct can_frame *cf,
+ struct sockaddr_in* addr);
+static int cegw_can2udp(void *data);
+static void cegw_can_send(struct socket *can_sock, struct can_frame *cf);
+static int cegw_thread_start(void *data);
+static int cegw_thread_stop(void);
-static struct task_struct* eth_to_can, * can_to_eth;
-static struct socket* udp_sock = NULL;
-static struct socket* can_sock = NULL;
-/* ToDo: protect with mutex */
-static int gw_state = CEGW_STOPPED;
+enum __cegw_state {
+ CEGW_RUN,
+ CEGW_STOP,
+ CEGW_EXIT
+};
-struct can_eth_gw
-{
- int src_if_idx;
- struct in_addr dst_addr;
- unsigned short dst_port;
+struct cegw_rule {
+ int can_ifindex;
+ struct in_addr eth_ip;
+ unsigned short eth_port;
struct hlist_node list;
};
-struct eth_can_gw
-{
- int dst_if_idx;
- struct hlist_node list;
+struct cegw_setting {
+ struct in_addr eth_ip;
+ unsigned short eth_port;
};
-HLIST_HEAD( can_eth_job );
-HLIST_HEAD( eth_can_job );
-struct
-{
- struct can_filter filter;
- int can_idx;
- /* bind on if */
- struct in_addr eth_addr;
- unsigned short eth_port;
-} cegw_setting;
+static int cegw_state = CEGW_STOP;
+static struct socket *can_sock = NULL, *udp_sock = NULL;
+static struct task_struct *eth_to_can = NULL, *can_to_eth = NULL;
+static struct notifier_block notifier;
-DECLARE_COMPLETION( udp_compl );
-DECLARE_COMPLETION( can_compl );
-DECLARE_COMPLETION( udp_fin );
-DECLARE_COMPLETION( can_fin );
-DEFINE_MUTEX( cegw_setting_mutex );
-/**/
+static HLIST_HEAD(rule_eth_can);
+static HLIST_HEAD(rule_can_eth);
+static DEFINE_MUTEX(rule_eth_can_mutex);
+static DEFINE_MUTEX(rule_can_eth_mutex);
+static DEFINE_MUTEX(cegw_mutex);
-static int gw_udp_recv( void* data )
+static void cegw_udp_send(struct socket *udp_sock, struct can_frame *cf, struct sockaddr_in* addr)
{
- struct can_frame cf;
+ struct msghdr mh;
struct kvec vec;
+
+ mh.msg_name = addr;
+ mh.msg_namelen = sizeof(*addr);
+ mh.msg_control = NULL;
+ mh.msg_controllen = 0;
+ mh.msg_flags = 0;
+
+ vec.iov_base = cf;
+ vec.iov_len = sizeof(*cf);
+
+ /* FIXME: Convert endianing of cf->can_id */
+ kernel_sendmsg(udp_sock, &mh, &vec, 1, sizeof(*cf));
+}
+
+static void cegw_can_send(struct socket* can_sock, struct can_frame* cf)
+{
struct msghdr mh;
- struct eth_can_gw* job;
- struct hlist_node* pos;
- int can_ifidx;
- int recv_size;
- struct sockaddr_in udp_addr;
+ struct kvec vec;
mh.msg_name = NULL;
mh.msg_namelen = 0;
- mh.msg_iov = NULL;
- mh.msg_iovlen = 0;
mh.msg_control = NULL;
mh.msg_controllen = 0;
mh.msg_flags = 0;
- mutex_lock( &cegw_setting_mutex );
- udp_addr.sin_family = AF_INET;
- udp_addr.sin_port = htons( cegw_setting.eth_port );
- udp_addr.sin_addr = cegw_setting.eth_addr;
- mutex_unlock( &cegw_setting_mutex );
+ vec.iov_base = cf;
+ vec.iov_len = sizeof(*cf);
- if( sock_create_kern( PF_INET, SOCK_DGRAM, IPPROTO_UDP, &udp_sock) != 0 )
- {
- printk( KERN_ERR "error: can_sock creation failed\n" );
- return -1;
- }
-
- if( kernel_bind( udp_sock, (struct sockaddr*)&udp_addr, sizeof( udp_addr ) ) != 0 ) /* ref impl ?!? */
- {
- printk( "error: binding failed\n" );
- sock_release( udp_sock );
- return -1;
- }
+ kernel_sendmsg(can_sock, &mh, &vec, 1, sizeof(*cf));
+}
+
+/**
+ * cegw_udp2can - performs udp->can routing
+ *
+ * This function is run as a thread.
+ */
+static int cegw_udp2can(void *data)
+{
+ struct can_frame cf;
+ struct kvec vec;
+ struct msghdr mh;
+ struct cegw_job *job = (struct cegw_job *)data;
+ struct socket *udp_sock = NULL, *can_sock = NULL;
+ int recv_size;
- printk( "gw_udp_recv is complete\n" );
- complete_all( &udp_compl ); /* ToDo: why _all? */
- wait_for_completion( &can_compl );
- printk( "gw_udp_recv continues\n" );
+ memset(&mh, 0, sizeof(mh));
+ udp_sock = job->udp_sock;
+ can_sock = job->can_sock;
- while( 1 )
- {
- if( gw_state == CEGW_STOPPED )
- break;
+ while (1) {
+ printk( "recv\n" );
vec.iov_base = &cf;
vec.iov_len = sizeof(cf);
- recv_size = kernel_recvmsg( udp_sock, &mh, &vec, 1, sizeof(cf), 0 ); /* ToDo: handle error */
- if( recv_size == 0 )
+ recv_size = kernel_recvmsg(udp_sock, &mh, &vec, 1,
+ sizeof(cf), 0);
+ /* if(recv_size != sizeof(cf) */
+ if (recv_size < 1) /* ToDo: split 0 and else */
{
- continue;
- }
- printk( "yes" );
- printk( "received udp msg_id:%d\n", cf.can_id );
- hlist_for_each_entry_rcu( job, pos, ð_can_job, list )
- {
- rcu_read_lock(); /**/
- can_ifidx = job->dst_if_idx;
- rcu_read_unlock();
- /* ToDo: from filter */
- gw_can_send( &cf, can_ifidx );
+ printk("udp2can error\n");
+ break;
}
+
+ /* FIXME: Convert endianing of cf.can_id */
+ printk( "sendit to can\n" );
+ cegw_can_send(can_sock, &cf);
}
- sock_release( udp_sock );
- complete_all( &udp_fin );
- printk( "udp terminates\n" );
return 0;
}
-inline static void gw_udp_send( struct can_frame* cf, struct in_addr ipaddr, u16 port )
-{
- struct msghdr mh;
- struct sockaddr_in addr;
- struct kvec vec;
-
- addr.sin_family = AF_INET;
- addr.sin_port = htons( port );
- addr.sin_addr = ipaddr;
-
- mh.msg_name = &addr;
- mh.msg_namelen = sizeof( addr );
- mh.msg_control = NULL;
- mh.msg_controllen = 0;
- mh.msg_flags = 0;
-
- vec.iov_base = cf;
- vec.iov_len = sizeof( *cf );
-
- kernel_sendmsg( udp_sock, &mh, &vec, 1, sizeof( *cf ) );
-}
-
-/**/
-
-static int gw_can_recv( void* data )
+/**
+ * cegw_can2udp - performs can->udp routing
+ *
+ * Runs as a thread.
+ */
+static int cegw_can2udp(void* data)
{
struct msghdr mh;
struct kvec vec;
struct can_frame cf;
- struct sockaddr_can ca;
- struct can_eth_gw* job;
- struct hlist_node* pos;
- struct in_addr eth_addr;
- u16 eth_port;
+ struct cegw_job* job = (struct cegw_job*)data;
int recv_size;
- struct sockaddr_can can_addr;
+ struct socket* udp_sock = job->udp_sock;
+ struct socket* can_sock = job->can_sock;
+ int i;
- mh.msg_name = &ca;
- mh.msg_namelen = sizeof( ca );
- mh.msg_control = NULL;
- mh.msg_controllen = 0;
- mh.msg_flags = 0;
-
- can_addr.can_family = AF_CAN;
- can_addr.can_ifindex = 0;
-
- if( sock_create_kern( PF_CAN, SOCK_RAW, CAN_RAW, &can_sock) != 0 )
- {
- printk( KERN_ERR "error: can_sock creation failed\n" );
- return -1;
- }
+ memset(&mh, 0, sizeof(mh));
- if( kernel_bind( can_sock, (struct sockaddr*) &can_addr, sizeof(can_addr) ) != 0 )
- {
- printk( KERN_ERR "can_sock bind failed\n" );
- sock_release( can_sock );
- return -1;
- }
+ while (1) {
+ vec.iov_base = &cf;
+ vec.iov_len = sizeof(cf);
- printk( "gw_can_recv is complete\n" );
- complete_all( &can_compl );
- wait_for_completion( &udp_compl );
- printk( "gw_can_recv continues\n" );
+ recv_size = kernel_recvmsg(can_sock, &mh, &vec, 1,
+ sizeof(cf), 0);
- while( 1 )
- {
- if( gw_state == CEGW_STOPPED ) /**/
+ if (recv_size < 1)
break;
- vec.iov_base = &cf;
- vec.iov_len = sizeof( cf );
- recv_size = kernel_recvmsg( can_sock, &mh, &vec, 1, sizeof( cf ), 0 );
- if( recv_size == 0 )
- {
- continue;
- }
- printk( "received can msg_id:%d, from:%d\n", cf.can_id, ca.can_ifindex );
- hlist_for_each_entry_rcu( job, pos, &can_eth_job, list )
+ for( i=0; i<job->udp_dstcnt; i++ )
{
- rcu_read_lock();
- eth_addr = job->dst_addr;
- eth_port = job->dst_port;
- rcu_read_unlock();
- printk( KERN_INFO "%x\n", eth_addr.s_addr );
- if( job->src_if_idx == ca.can_ifindex )
- gw_udp_send( &cf, eth_addr, eth_port );
+ cegw_udp_send(udp_sock, &cf, &job->udp_dst[i]);
}
}
-
- sock_release( can_sock );
- complete_all( &can_fin );
- printk( "can terminates\n" );
+
return 0;
}
-inline static void gw_can_send( struct can_frame* cf, int ifidx )
+static int cegw_notifier(struct notifier_block *nb, unsigned long msg, void *data)
{
- struct msghdr mh;
- struct kvec vec;
- struct sockaddr_can ca =
- {
- .can_family = AF_CAN,
- .can_ifindex = ifidx
- };
-
- mh.msg_name = &ca;
- mh.msg_namelen = sizeof( ca );
- mh.msg_control = NULL;
- mh.msg_controllen = 0;
- mh.msg_flags = 0;
-
- vec.iov_base = cf;
- vec.iov_len = sizeof( *cf );
-
- kernel_sendmsg( can_sock, &mh, &vec, 1, sizeof( *cf ) );
-}
+ struct net_device *dev = (struct net_device *)data;
+ struct cegw_rule *rule;
+ struct hlist_node *pos, *n;
+
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+ if (dev->type != ARPHRD_CAN)
+ return NOTIFY_DONE;
+
+ if (msg == NETDEV_UNREGISTER) {
+ hlist_for_each_entry_safe(rule, pos, n, &rule_eth_can, list) {
+ if (rule->can_ifindex == dev->ifindex) {
+ hlist_del(&rule->list);
+ kfree(rule);
+ }
+ }
-/* NetLink */
+ hlist_for_each_entry_safe(rule, pos, n, &rule_can_eth, list) {
+ if (rule->can_ifindex == dev->ifindex) {
+ hlist_del(&rule->list);
+ kfree(rule);
+ }
+ }
+ }
+
+ return NOTIFY_DONE;
+}
-static int cegw_create_job( struct sk_buff* skb, struct nlmsghdr* nlh, void* arg )
+/**
+ * cegw_thread_start - start working threads
+ * @data: (struct cegw_setting *) with new listening address
+ *
+ * Two threads are started. One is serving udp->can routing and the other
+ * can->udp.
+ */
+static int cegw_thread_start(void *data)
{
- struct nlattr* tb[ CGW_MAX+1 ];
- struct can_eth_gw* cethgw = NULL;
- struct eth_can_gw* ecangw = NULL;
- int err = 0;
-
- /* ToDo: size check
- if (nlmsg_len(nlh) < sizeof(*r))
- return -EINVAL;
- */
-
- err = nlmsg_parse( nlh, sizeof( struct rtmsg ), tb, CGW_MAX, NULL );
- if( err < 0 )
- {
- printk( KERN_ERR "error: nlmsg_parse\n" );
- return err;
- }
+ struct task_struct *task = NULL;
- if( tb[CGW_CMD_INFO] == NULL )
- {
- printk( "error: bad cmd\n" );
- return -EINVAL;
+ task = kthread_run(cegw_udp2can, data, "canethgw_udp2can");
+ if (IS_ERR(task)) {
+ goto out_err;
}
- switch( *(int*)nla_data( tb[CGW_CMD_INFO] ) )
- {
- case CEGW_LISTEN:
- if( gw_state == CEGW_RUNNING )
- {
- mutex_lock( &cegw_setting_mutex );
- cegw_setting.eth_addr = *(struct in_addr*)nla_data( tb[CGW_LISTEN_IP] );
- cegw_setting.eth_port = *(u16*)nla_data( tb[CGW_LISTEN_PORT] );
- mutex_unlock( &cegw_setting_mutex );
- kthread_run( cegw_thread_restart, NULL, "canethgw" );
- } else
- {
- mutex_lock( &cegw_setting_mutex );
- cegw_setting.eth_addr = *(struct in_addr*)nla_data( tb[CGW_LISTEN_IP] );
- cegw_setting.eth_port = *(u16*)nla_data( tb[CGW_LISTEN_PORT] );
- mutex_unlock( &cegw_setting_mutex );
- cegw_thread_start();
- }
- break;
- case CGW_TYPE_CAN_ETH_UDP:
- printk( KERN_INFO "can:%d\n", *(int*)nla_data( tb[CGW_CAN_IF] ) );
- printk( KERN_INFO "eth addr:%x\n", *(u32*)nla_data( tb[CGW_ETH_IP] ) );
- printk( KERN_INFO "eth port:%hu\n", *(u16*)nla_data( tb[CGW_ETH_PORT] ) );
- cethgw = kmalloc( sizeof(struct can_eth_gw), GFP_KERNEL );
- if( cethgw == NULL )
- {
- printk( KERN_ERR "error: kmalloc\n" );
- break;
- }
- cethgw->src_if_idx = *(int*)nla_data( tb[CGW_CAN_IF] );
- cethgw->dst_addr = *(struct in_addr*)nla_data( tb[CGW_ETH_IP] );
- cethgw->dst_port = *(u16*)nla_data( tb[CGW_ETH_PORT] );
-
- hlist_add_head_rcu( &cethgw->list, &can_eth_job );
- break;
- case CGW_TYPE_ETH_CAN_UDP:
- printk( KERN_INFO "can:%d\n", *(int*)nla_data( tb[CGW_CAN_IF] ) );
- ecangw = kmalloc( sizeof(struct eth_can_gw), GFP_KERNEL );
- if( ecangw == NULL )
- {
- printk( KERN_ERR "error: kmalloc\n" );
- break;
- }
- ecangw->dst_if_idx = *(int*)nla_data( tb[CGW_CAN_IF] );
- hlist_add_head_rcu( &ecangw->list, ð_can_job );
- break;
- default:
- printk( "default" );
- /* ToDo undef operation */
- break;
+ task = kthread_run(cegw_can2udp, data, "canethgw_can2udp");
+ if (IS_ERR(task)) {
+ goto out_err;
}
return 0;
+out_err:
+ return -ENOMEM;
}
-static int cegw_remove_job( struct sk_buff* skb, struct nlmsghdr* nlh, void* arg )
+/**
+ * cegw_thread_stop - stops threads and wait for exit
+ *
+ * Waits for threads to stop. Does nothing if cegw_state == CEGW_STOP.
+ */
+static int cegw_thread_stop(void)
{
- struct rtmsg* r;
- struct nlattr* tb[ CGW_MAX+1 ];
- struct hlist_node* pos,* n;
- struct can_eth_gw* ceth;
- struct eth_can_gw* ecan;
-
- int err = 0;
+ int how = SHUT_RDWR;
+ struct sock *sk = NULL;
- if( nlmsg_len(nlh) < sizeof(*r) )
- return -EINVAL;
-
- r = nlmsg_data( nlh );
+ if (cegw_state == CEGW_STOP)
+ return 0;
- if( r->rtm_family != AF_CAN )
- return -EPFNOSUPPORT;
+ cegw_state = CEGW_STOP;
+ /* shut down socket */
+ sk = can_sock->sk;
+ how++;
+ lock_sock(sk);
+ sk->sk_shutdown |= how;
+ sk->sk_state_change(sk);
+ release_sock(sk);
- /*
- if( r->gwtype != CGW_TYPE_CAN_ETH_UDP )
- return -EINVAL;
- */
- printk( "attrsize=%d\n", nlmsg_attrlen(nlh, sizeof(struct rtmsg)) );
+ kernel_sock_shutdown(udp_sock, SHUT_RDWR);
- err = nlmsg_parse( nlh, sizeof(struct rtmsg), tb, CGW_MAX, NULL );
- if( err != 0 )
- return -EINVAL;
+ /* wait for return to reuse port if restart */
+ kthread_stop(eth_to_can);
+ kthread_stop(can_to_eth);
+ sock_release(udp_sock);
+ sock_release(can_sock);
+ can_to_eth = NULL;
+ eth_to_can = NULL;
- if( tb[CGW_CMD_INFO] == NULL )
- return -EINVAL;
-
- if( *(int*)nla_data( tb[CGW_CMD_INFO] ) == CEGW_FLUSH )
- {
- hlist_for_each_entry_safe( ceth, pos, n, &can_eth_job, list )
- {
- hlist_del( &ceth->list );
- kfree( ceth );
- }
- hlist_for_each_entry_safe( ecan, pos, n, ð_can_job, list )
- {
- hlist_del( &ecan->list );
- kfree( ecan );
- }
- }
- // tb[]
return 0;
}
-static int cegw_dump_job( struct sk_buff* skb, struct netlink_callback* cb )
+static int cegw_open(struct inode *inode, struct file *file)
{
- struct can_eth_gw* ceth;
- struct eth_can_gw* ecan;
- struct hlist_node* pos;
- struct nlmsghdr* nlh;
- int idx = 0;
- int s_idx = cb->args[0];
- int ifidx, type;
- struct in_addr dst_ip;
- unsigned short dst_port;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu( ecan, pos, ð_can_job, list )
- {
-
- // if( idx < s_idx )
- // goto cont1;
+ file->private_data = "greetings";
- nlh = nlmsg_put( skb, 0, 0, 0, 0, 0 );
+ printk("cegw device opened\n");
+ return 0;
+}
- ifidx = ecan->dst_if_idx;
- type = CGW_TYPE_ETH_CAN_UDP;
- nla_put( skb, CGW_TYPE, sizeof(type), &type );
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(type) );
+static int cegw_release(struct inode *inode, struct file *file)
+{
+ struct cegw_job *job = (struct cegw_job *)file->private_data;
- nla_put( skb, CGW_CAN_IF, sizeof(ifidx), &ifidx ); /* ToDo return */
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(ifidx) );
-cont1:
- idx++;
- }
- rcu_read_unlock();
+ sock_release( job->udp_sock );
+ sock_release( job->can_sock );
+ printk("cegw device released, data=%s\n", (char *)file->private_data);
+ return 0;
+}
- rcu_read_lock();
- hlist_for_each_entry_rcu( ceth, pos, &can_eth_job, list )
+static long cegw_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int err = 0;
+ int memsz = 0;
+ __u32 dstcnt = 0;
+ __u32 addrlen = 0;
+ struct cegw_ioctl *gwctl = NULL;
+ struct cegw_job *job = NULL;
+
+ /* ToDo: verify access and authorization */
+ if( get_user(dstcnt, &((struct cegw_ioctl __user *)arg)->udp_dstcnt) != 0 )
+ return -EFAULT;
+ if( get_user(addrlen, &((struct cegw_ioctl __user *)arg)->udp_addrlen) != 0 )
+ return -EFAULT;
+
+ memsz = sizeof(*gwctl) + dstcnt * addrlen;
+ /* ToDo: memory limit */
+ gwctl = kmalloc(GFP_KERNEL, memsz);
+ if (gwctl==NULL)
+ return -ENOMEM;
+
+ err = copy_from_user(gwctl, (void __user *)arg, memsz);
+ if (err != 0)
{
- // if( idx < s_idx )
- // goto cont2;
-
- nlh = nlmsg_put( skb, 0, 0, 0, 0, 0 );
-
- ifidx = ceth->src_if_idx;
- type = CGW_TYPE_CAN_ETH_UDP;
- dst_ip = ceth->dst_addr;
- dst_port = ceth->dst_port;
-
- nla_put( skb, CGW_TYPE, sizeof(type), &type );
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(type) );
-
- nla_put( skb, CGW_CAN_IF, sizeof(ifidx), &ifidx ); /* ToDo return */
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(ifidx) );
-
- nla_put( skb, CGW_ETH_IP, sizeof(dst_ip), &dst_ip ); /* ToDo return */
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(dst_ip) );
-
- nla_put( skb, CGW_ETH_PORT, sizeof(dst_port), &dst_port ); /* ToDo return */
- nlh->nlmsg_len += NLA_HDRLEN + NLA_ALIGN( sizeof(dst_port) );
-
- //nla_put( skb, CGW_ETH_IP, sizeof() IP_ADDR )
-cont2:
- idx++;
+ return -EFAULT;
}
- rcu_read_unlock();
-
- /* ToDo nlmsg_cancel */
- cb->args[0] = idx;
-
- return skb->len;
-}
+ /**/
+ job = kmalloc(GFP_KERNEL, sizeof(*job));
+ if (job == NULL)
+ return -ENOMEM;
-static void cegw_thread_start( void )
-{
- gw_state = CEGW_RUNNING;
-
- INIT_COMPLETION( udp_compl );
- INIT_COMPLETION( can_compl );
- INIT_COMPLETION( udp_fin );
- INIT_COMPLETION( can_fin );
-
- eth_to_can = kthread_run( gw_udp_recv, NULL, "canethgw" );
- can_to_eth = kthread_run( gw_can_recv, NULL, "canethgw" );
-
- printk( KERN_INFO "threads are running\n" );
-}
+ job->udp_dst = kmalloc(GFP_KERNEL, dstcnt * addrlen); /* ToDo: limit */
+ if (job->udp_dst == NULL)
+ return -ENOMEM;
-/* ToDo: stop when no threads started */
-static void cegw_thread_stop( void )
-{
- int how = SHUT_RDWR;
- struct sock* sk = NULL;
+ err = copy_from_user(job->udp_dst, (void __user *)(arg + sizeof(struct cegw_ioctl)), dstcnt*addrlen);
+ if (err != 0)
+ return -EFAULT;
- /* be sure sockets exist */
- wait_for_completion( &can_compl );
- wait_for_completion( &udp_compl );
- gw_state = CEGW_STOPPED;
+ job->udp_sock = sockfd_lookup( gwctl->udp_sock, &err );
+ if (job->udp_sock == NULL)
+ return err;
- sk = can_sock->sk;
- how++;
- lock_sock( sk );
- sk->sk_shutdown |= how;
- sk->sk_state_change( sk );
- release_sock( sk );
+ job->can_sock = sockfd_lookup( gwctl->can_sock, &err );
+ if (job->can_sock == NULL)
+ return err;
- kernel_sock_shutdown( udp_sock, SHUT_RDWR );
+ job->udp_dstcnt = dstcnt;
- /* wait for shutdown to be able to reuse port */
- wait_for_completion( &udp_fin );
- wait_for_completion( &can_fin );
-}
+ /* ToDo: sin_family? */
-static int cegw_thread_restart( void* data )
-{
- printk( "restart\n" );
+ file->private_data = job;
+ cegw_thread_start(job);
- cegw_thread_stop();
- cegw_thread_start();
+ /* process udp destinations */
+ switch (cmd) {
+ case CEGW_IOCTL_START:
+ printk("udp_dstcnt=%i\n", gwctl->udp_dstcnt);
+ printk("udp_dst[0] family=%i\n", job->udp_dst[0].sin_family);
+ printk("udp_dst[1] family=%i\n", job->udp_dst[1].sin_family);
+ break;
+ default:
+ printk("undefined ioctl command\n");
+ break;
+ }
return 0;
}
-/***********************
- * module init/exit
- ***********************/
+static const struct file_operations cegw_fops = {
+ .owner = THIS_MODULE,
+ .open = cegw_open,
+ .release = cegw_release,
+ .unlocked_ioctl = cegw_ioctl
+};
+
+static struct miscdevice cegw_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "cegw",
+ .fops = &cegw_fops
+};
-static int __init cangw_init( void )
+static int __init cegw_init(void)
{
- /* subscribe to netlink */
- if( __rtnl_register( PF_CAN, RTM_GETROUTE, NULL, cegw_dump_job, NULL ) != 0 )
- {
- printk( KERN_ERR "error: rtnl_register fail\n" );
- return -1;
- }
- __rtnl_register( PF_CAN, RTM_NEWROUTE, cegw_create_job, NULL, NULL );
- __rtnl_register( PF_CAN, RTM_DELROUTE, cegw_remove_job, NULL, NULL );
+ misc_register(&cegw_device);
+
+ return 0;
+ notifier.notifier_call = cegw_notifier;
+ register_netdevice_notifier(¬ifier);
return 0;
}
-static void __exit cangw_exit( void )
+static void __exit cegw_exit(void)
{
- if( gw_state == CEGW_RUNNING )
- {
- cegw_thread_stop();
- /* ToDo: frees mem_cache? */
- /* udp must not exists */
- }
+ misc_deregister(&cegw_device);
+
+ return;
+ /* ToDo: effect on cangw? */
+ rtnl_unregister_all(PF_CAN);
+
+ /* wait for rtnl callbacks */
+ rtnl_lock();
+ rtnl_unlock();
+
+ mutex_lock(&cegw_mutex);
+ cegw_thread_stop();
+ cegw_state = CEGW_EXIT;
+ mutex_unlock(&cegw_mutex);
- /* ToDo: unregister netlink
- * free jobs */
- printk( "cangw: exit\n" );
+ unregister_netdevice_notifier(¬ifier);
+ //cegw_flush();
}
-module_init( cangw_init );
-module_exit( cangw_exit );
+module_init(cegw_init);
+module_exit(cegw_exit);
projects / can-eth-gw.git / blobdiff