/* * Ethernet netdevice using ATM AAL5 as underlying carrier * (RFC1483 obsoleted by RFC2684) for Linux * * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary * Eric Kinzie, 2006-2007, US Naval Research Laboratory */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_WAN_VLAN_SUPPORT #include #endif #include "common.h" /*------------------------------------------------------------------------------------------*\ \*------------------------------------------------------------------------------------------*/ #if defined(CONFIG_MACH_FUSIV) static unsigned char atmMacAddr[6] = {0x0,0x0,0x1,0x0,0x0,0x0}; // =========================================================================== // Function name: ATM_getPermanentMacAddress // Input Parameters: none // Output Parameters: mac address // Result: none // Description: Returns the mac address to be used for all ATM based // logical interfaces. // =========================================================================== void ATM_getPermanentMacAddress_local(unsigned char *macAddr) { memcpy(macAddr, atmMacAddr, 6); } //extern int AtmUpdateNewVCInfo(int encap, struct atm_vcc *atmvcc, int moduleId,char *ifname); int (*AtmUpdateNewVCInfo_ptr)(int encap, struct atm_vcc *atmvcc, int moduleId, char *ifname) = NULL; int (*AtmUpdateVCInfo_ptr)(void *atmqos) = NULL; //extern int AtmDeleteVCInfo(short vpi,int vci); int (*AtmDeleteVCInfo_ptr)(short vpi,int vci) =NULL; //extern void ATM_getPermanentMacAddress(unsigned char *macAddr); #define ADI_BR2684_MODULE 2 struct atm_vcc * adi_getvcc(char *ifname); #define LLC_BRIDGED_OVERHEAD 10 #define VC_BRIDGED_OVERHEAD 2 #define LLC_ROUTED_OVERHEAD 8 #define VC_ROUTED_OVERHEAD 0 #endif #if defined(CONFIG_FUSIV_KERNEL_AP_2_AP) || defined(CONFIG_FUSIV_KERNEL_AP_2_AP_MODULE) int (*br2684AddMacAddrToAP_ptr)(unsigned char* dev_addr) = NULL; int (*br2684DelMacAddrFromAP_ptr)(unsigned char* dev_addr) = NULL; #endif #ifdef SKB_DEBUG static void skb_debug(const struct sk_buff *skb) { #define NUM2PRINT 50 char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */ int i = 0; for (i = 0; i < skb->len && i < NUM2PRINT; i++) { sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); } printk(KERN_DEBUG "br2684: skb[%p]: %s\n", skb->data, buf); } #else #define skb_debug(skb) do {} while (0) #endif #if defined(CONFIG_FUSIV_KERNEL_PPPOE_RELAY) || defined(CONFIG_FUSIV_KERNEL_PPPOE_RELAY_MODULE) int (*getConfigModuleId_ptr)(int vpi,int vci) = NULL; int (*checkPPPOERelayStatus_ptr)(char *name) = NULL; #endif #define BR2684_LLC_LEN 3 #define BR2684_SNAP_LEN 3 #define BR2684_ETHERTYPE_LEN 2 #define BR2684_PID_LEN 2 #define BR2684_PAD_LEN 2 #define LLC 0xaa, 0xaa, 0x03 #define SNAP_BRIDGED 0x00, 0x80, 0xc2 #define SNAP_ROUTED 0x00, 0x00, 0x00 #define PID_ETHERNET 0x00, 0x07 #define ETHERTYPE_IPV4 0x08, 0x00 #define ETHERTYPE_IPV6 0x86, 0xdd #define PAD_BRIDGED 0x00, 0x00 static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 }; static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 }; static const unsigned char llc_oui_pid_pad[] = { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED }; static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 }; static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 }; enum br2684_encaps { e_vc = BR2684_ENCAPS_VC, e_llc = BR2684_ENCAPS_LLC, }; struct br2684_vcc { struct atm_vcc *atmvcc; struct net_device *device; /* keep old push, pop functions for chaining */ void (*old_push) (struct atm_vcc * vcc, struct sk_buff * skb); void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); enum br2684_encaps encaps; struct list_head brvccs; #ifdef CONFIG_ATM_BR2684_IPFILTER struct br2684_filter filter; #endif /* CONFIG_ATM_BR2684_IPFILTER */ unsigned copies_needed, copies_failed; }; #ifdef CONFIG_WAN_VLAN_SUPPORT extern struct wan_vlan_struct; uint32_t g_br2684_tag_vlan_enable; #endif struct br2684_dev { struct net_device *net_dev; struct list_head br2684_devs; int number; struct list_head brvccs; /* one device <=> one vcc (before xmas) */ int mac_was_set; enum br2684_payload payload; #ifdef CONFIG_WAN_VLAN_SUPPORT struct wan_vlan_struct vlan; #endif }; /* * This lock should be held for writing any time the list of devices or * their attached vcc's could be altered. It should be held for reading * any time these are being queried. Note that we sometimes need to * do read-locking under interrupt context, so write locking must block * the current CPU's interrupts */ static DEFINE_RWLOCK(devs_lock); static LIST_HEAD(br2684_devs); static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev) { return (struct br2684_dev *)netdev_priv(net_dev); } static inline struct net_device *list_entry_brdev(const struct list_head *le) { return list_entry(le, struct br2684_dev, br2684_devs)->net_dev; } static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc) { return (struct br2684_vcc *)(atmvcc->user_back); } static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le) { return list_entry(le, struct br2684_vcc, brvccs); } static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb, const struct br2684_dev *brdev) { return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */ } #ifdef CONFIG_WAN_VLAN_SUPPORT static inline void dump_skb(u32 len, char * data) { int i; #if 0 printk("addr = %p\n",data); for(i=0;ipayload, p_bridged); /* cannot be null, as already checked */ //if ( brvcc->payload != p_bridged ) { if ( brdev->payload != p_bridged ) { printk("brvcc is not bridged!Cannot insert VLAN header\n"); return -1; } if ( g_br2684_tag_vlan_enable == 0) { return -1; } //printk("g_br2684_tag_vlan_enabled!\nProceed to add vlan tag\n"); //dump_skb(32, skb->data); //if (skb_headroom(skb) < VLAN_HLEN ) { // struct sk_buff *skb2 = skb_realloc_headroom(skb, VLAN_HLEN); // // printk("headroom [%d] less than VLAN_HLEN [%d] skb2 [%p]\n",skb_headroom(skb), VLAN_HLEN, skb2); // brvcc->copies_needed++; // dev_kfree_skb(skb); // printk("skb is freed\n"); // if (skb2 == NULL) { // printk("skb is NULL returning\n"); // brvcc->copies_failed++; // return 0; // } // skb = skb2; // skb2=NULL; //} vehdr = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); //printk("vehdr = %p\n",vehdr); memmove(skb->data, skb->data+VLAN_HLEN, 2*ETH_ALEN); vehdr->h_vlan_proto = __constant_htons(ETH_P_8021Q); // vehdr->h_vlan_TCI = brdev->vlan.vlan_vci; if(skb->mark==0) { vehdr->h_vlan_TCI = brdev->vlan.vlan_vci; } else { vehdr->h_vlan_TCI = (((skb->mark-1) << 13) |( brdev->vlan.vlan_vci & 0x1FFF )); } //printk("\nh_vlan_proto=[%d] h_vlan_TCI=[%d]\n", vehdr->h_vlan_proto, vehdr->h_vlan_TCI); //printk("VLAN header INSERTED in this skb\n"); //dump_skb(32, skb->data); return 0; } int br2684_remove_vlan_tag( struct sk_buff *skb, struct br2684_dev *brdev, int f_untag) { struct br2684_vcc *brvcc = pick_outgoing_vcc(skb, brdev); struct vlan_ethhdr *vehdr=NULL; //printk("brdev = (%p) payload=(%d) p_bridged=(%d)\n", brdev, brdev->payload, p_bridged); /* cannot be null, as already checked */ //if ( brvcc->payload != p_bridged ) { if ( brdev->payload != p_bridged ) { printk("brvcc is not bridged!Cannot insert VLAN header\n"); return -1; } if ( g_br2684_tag_vlan_enable == 0) { return -1; } /* Check if pkt has a VLAN tag. */ vehdr = (struct vlan_ethhdr *) (skb->data); //printk("vehdr = %p\n",vehdr); //dump_skb(32, skb->data); //printk("(UNTAG):vci [%d] : dev vci [%d] f_untag [%d]\n", vehdr->h_vlan_TCI, brdev->vlan.vlan_vci, f_untag); if ( f_untag || vehdr->h_vlan_TCI == (brdev->vlan.vlan_vci & 0x00FF)) { char *ptr1 = (char *) &(vehdr->h_vlan_encapsulated_proto); char *ptr2 = (char *) &(vehdr->h_vlan_proto); int i=0; int rem_len=2*ETH_ALEN; skb->protocol = vehdr->h_vlan_encapsulated_proto; for (i=0; iprotocol = ((u16 *) skb->data)[-1]; //printk("VLAN header REMOVED in this skb\n"); //dump_skb(32, skb->data); } return 0; } int br2684_remove_vlan_tag_rcv( struct sk_buff *skb, struct br2684_dev *brdev, int f_untag) { struct br2684_vcc *brvcc = pick_outgoing_vcc(skb, brdev); struct vlan_ethhdr *vehdr=NULL; //printk("\nEntering : (%s)\n", __FUNCTION__); //printk("brdev = (%p) payload=(%d) p_bridged=(%d)\n", brdev, brdev->payload, p_bridged); /* cannot be null, as already checked */ //if ( brvcc->payload != p_bridged ) { if ( brdev->payload != p_bridged ) { printk("brvcc is not bridged!Cannot insert VLAN header\n"); return -1; } if ( g_br2684_tag_vlan_enable == 0) { return -1; } /* Check if pkt has a VLAN tag. */ vehdr = (struct vlan_ethhdr *) (eth_hdr(skb)); //in RCV path, skb->data is pointing to ntwk hdr. //dump_skb(32, skb->data); //printk("(REMOVE):vci [%d] : dev vci [%d] f_untag [%d]\n", vehdr->h_vlan_TCI, brdev->vlan.vlan_vci, f_untag); if ( f_untag || vehdr->h_vlan_TCI == (brdev->vlan.vlan_vci & 0x0FFF)) { char *ptr1 = (char *) &(vehdr->h_vlan_encapsulated_proto); char *ptr2 = (char *) &(vehdr->h_vlan_proto); int i=0; int rem_len=2*ETH_ALEN; skb->data = eth_hdr(skb); for (i=0; idata); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32) skb->mac.raw +=VLAN_HLEN; #else skb->mac_header +=VLAN_HLEN; #endif skb->data += ETH_HLEN; //again make it point to ntwk hdr skb->protocol = ((u16 *) skb->data)[-1]; } return 0; } #endif /* Caller should hold read_lock(&devs_lock) */ static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) { struct list_head *lh; struct net_device *net_dev; switch (s->method) { case BR2684_FIND_BYNUM: list_for_each(lh, &br2684_devs) { net_dev = list_entry_brdev(lh); if (BRPRIV(net_dev)->number == s->spec.devnum) return net_dev; } break; case BR2684_FIND_BYIFNAME: list_for_each(lh, &br2684_devs) { net_dev = list_entry_brdev(lh); if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ)) return net_dev; } break; } return NULL; } /* chained vcc->pop function. Check if we should wake the netif_queue */ static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb) { struct br2684_vcc *brvcc = BR2684_VCC(vcc); struct net_device *net_dev = skb->dev; pr_debug("br2684_pop(vcc %p ; net_dev %p )\n", vcc, net_dev); brvcc->old_pop(vcc, skb); if (!net_dev) return; if (atm_may_send(vcc, 0)) netif_wake_queue(net_dev); } /* * Send a packet out a particular vcc. Not to useful right now, but paves * the way for multiple vcc's per itf. Returns true if we can send, * otherwise false */ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev, struct br2684_vcc *brvcc) { struct br2684_dev *brdev = BRPRIV(dev); struct atm_vcc *atmvcc; #ifdef CONFIG_WAN_VLAN_SUPPORT int minheadroom = (brvcc->encaps == e_llc) ? 14 : 6; #else int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; #endif // CONFIG_WAN_VLAN_SUPPORT if (skb_headroom(skb) < minheadroom) { struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); brvcc->copies_needed++; dev_kfree_skb(skb); if (skb2 == NULL) { brvcc->copies_failed++; return 0; } skb = skb2; } #ifdef CONFIG_WAN_VLAN_SUPPORT if(g_br2684_tag_vlan_enable) { if ( brdev->vlan.untag_vlan) { br2684_remove_vlan_tag(skb, brdev, 1); } if ( brdev->vlan.tag_vlan_enable) { br2684_insert_vlan_tag(skb, brdev); } } #endif if (brvcc->encaps == e_llc) { if (brdev->payload == p_bridged) { skb_push(skb, sizeof(llc_oui_pid_pad)); skb_copy_to_linear_data(skb, llc_oui_pid_pad, sizeof(llc_oui_pid_pad)); } else if (brdev->payload == p_routed) { unsigned short prot = ntohs(skb->protocol); skb_push(skb, sizeof(llc_oui_ipv4)); switch (prot) { case ETH_P_IP: skb_copy_to_linear_data(skb, llc_oui_ipv4, sizeof(llc_oui_ipv4)); break; case ETH_P_IPV6: skb_copy_to_linear_data(skb, llc_oui_ipv6, sizeof(llc_oui_ipv6)); break; default: dev_kfree_skb(skb); return 0; } } } else { /* e_vc */ if (brdev->payload == p_bridged) { skb_push(skb, 2); memset(skb->data, 0, 2); } else { /* p_routed */ skb_pull(skb, ETH_HLEN); } } skb_debug(skb); ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); #if !defined(CONFIG_MACH_FUSIV) atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc); #endif ATM_SKB(skb)->atm_options = atmvcc->atm_options; dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; atmvcc->send(atmvcc, skb); if (!atm_may_send(atmvcc, 0)) { netif_stop_queue(brvcc->device); /*check for race with br2684_pop*/ if (atm_may_send(atmvcc, 0)) netif_start_queue(brvcc->device); } return 1; } static netdev_tx_t br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct br2684_dev *brdev = BRPRIV(dev); struct br2684_vcc *brvcc; pr_debug("br2684_start_xmit, skb_dst(skb)=%p\n", skb_dst(skb)); read_lock(&devs_lock); brvcc = pick_outgoing_vcc(skb, brdev); if (brvcc == NULL) { pr_debug("no vcc attached to dev %s\n", dev->name); dev->stats.tx_errors++; dev->stats.tx_carrier_errors++; /* netif_stop_queue(dev); */ dev_kfree_skb(skb); read_unlock(&devs_lock); return NETDEV_TX_OK; } if (!br2684_xmit_vcc(skb, dev, brvcc)) { /* * We should probably use netif_*_queue() here, but that * involves added complication. We need to walk before * we can run. * * Don't free here! this pointer might be no longer valid! */ dev->stats.tx_errors++; dev->stats.tx_fifo_errors++; } read_unlock(&devs_lock); return NETDEV_TX_OK; } /* * We remember when the MAC gets set, so we don't override it later with * the ESI of the ATM card of the first VC */ static int br2684_mac_addr(struct net_device *dev, void *p) { #ifdef CONFIG_IFX_ATM int err = 0; struct sockaddr *addr = p; memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); #else int err = eth_mac_addr(dev, p); #endif if (!err) { BRPRIV(dev)->mac_was_set = 1; #if defined(CONFIG_FUSIV_KERNEL_AP_2_AP) || defined(CONFIG_FUSIV_KERNEL_AP_2_AP_MODULE) // delete the old mac in AP and add new one if (br2684DelMacAddrFromAP_ptr) br2684DelMacAddrFromAP_ptr(old_mac); if (br2684AddMacAddrToAP_ptr) br2684AddMacAddrToAP_ptr(dev->dev_addr); #endif } return err; } #ifdef CONFIG_WAN_VLAN_SUPPORT static int br2684_setvlansettings(struct atm_vcc *atmvcc, unsigned long arg) { struct br2684_vcc *brvcc=NULL; struct br2684_filter_set fs; struct wan_vlan_struct tmpvlan; struct br2684_dev *brdev; struct net_device *net_dev; struct br2684_dev *brdev1; if (copy_from_user(&tmpvlan, (void *)arg, sizeof(struct wan_vlan_struct))) { printk("Error in copy_from_user for vlan struct\n"); return -EFAULT; } //printk("if [%d] untag [%d] tag [%d] vlanvci [%x]\n", tmpvlan.vlan_if_num, tmpvlan.untag_vlan, tmpvlan.tag_vlan_enable, tmpvlan.vlan_vci); fs.ifspec.spec.devnum = tmpvlan.vlan_if_num+1; //fs.ifspec.method = BR2684_FIND_BYNUM; /* Use BR2684_FIND_BYIFNAME with the interface name copied from user space */ //printk("tnpvlan name = %s\n",tmpvlan.vlan_if_name); sprintf(fs.ifspec.spec.ifname, "%s", tmpvlan.vlan_if_name); fs.ifspec.spec.ifname[IFNAMSIZ-1] = '\0'; fs.ifspec.method = BR2684_FIND_BYIFNAME; //printk("fs.ifspec.spec.ifname [%s]\n", fs.ifspec.spec.ifname); read_lock(&devs_lock); #if 0 brdev = br2684_find_dev(&fs.ifspec); #else net_dev = br2684_find_dev(&fs.ifspec); if (net_dev == NULL) { //printk(KERN_ERR // "br2684: tried to attach to non-existant device\n"); brdev = NULL; } else { brdev = BRPRIV(net_dev); } #endif #if 0 if (brdev==NULL) printk("brdev NULL!\n"); #endif if (brdev == NULL || list_empty(&brdev->brvccs) || brdev->brvccs.next != brdev->brvccs.prev) { /* >1 VCC */ if (brdev && list_empty(&brdev->brvccs)) printk("list empty brdev->brvccs\n"); else if ( brdev && brdev->brvccs.next != brdev->brvccs.prev) printk("more than 1 vcc :( \n"); brvcc = NULL; } else { //printk("getting brvcc !!\n"); brvcc = list_entry_brvcc(brdev->brvccs.next); } read_unlock(&devs_lock); if (brvcc == NULL) { #if 0 printk("WAN-VLAN configuration : Cannot find brvcc for this atmvcc\n"); #endif return -ESRCH; } //brvcc->brdev->vlan = kmalloc(sizeof(struct wan_vlan_struct), GFP_KERNEL); brdev->vlan.vlan_if_num = tmpvlan.vlan_if_num; brdev->vlan.tag_vlan_enable = tmpvlan.tag_vlan_enable; brdev->vlan.untag_vlan = tmpvlan.untag_vlan; brdev->vlan.vlan_vci = tmpvlan.vlan_vci; /* Mark br2684 VLAN settings for easy check */ if (tmpvlan.tag_vlan_enable /*&& tmpvlan.vlan_vci != 0*/) { /* Could be priority tag with vid = 0 as well */ brdev->net_dev->priv_flags |= IFF_BR2684_VLAN; } else { brdev->net_dev->priv_flags &= ~IFF_BR2684_VLAN; } pr_debug("For %s vlan is [%d %d %d %u]\n", brdev->net_dev->name, brdev->vlan.vlan_if_num, brdev->vlan.tag_vlan_enable, brdev->vlan.untag_vlan, brdev->vlan.vlan_vci); return 0; } #endif #ifdef CONFIG_ATM_BR2684_IPFILTER /* this IOCTL is experimental. */ static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg) { struct br2684_vcc *brvcc; struct br2684_filter_set fs; if (copy_from_user(&fs, arg, sizeof fs)) return -EFAULT; if (fs.ifspec.method != BR2684_FIND_BYNOTHING) { /* * This is really a per-vcc thing, but we can also search * by device. */ struct br2684_dev *brdev; read_lock(&devs_lock); brdev = BRPRIV(br2684_find_dev(&fs.ifspec)); if (brdev == NULL || list_empty(&brdev->brvccs) || brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */ brvcc = NULL; else brvcc = list_entry_brvcc(brdev->brvccs.next); read_unlock(&devs_lock); if (brvcc == NULL) return -ESRCH; } else brvcc = BR2684_VCC(atmvcc); memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter)); return 0; } /* Returns 1 if packet should be dropped */ static inline int packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb) { if (brvcc->filter.netmask == 0) return 0; /* no filter in place */ if (type == htons(ETH_P_IP) && (((struct iphdr *)(skb->data))->daddr & brvcc->filter. netmask) == brvcc->filter.prefix) return 0; if (type == htons(ETH_P_ARP)) return 0; /* * TODO: we should probably filter ARPs too.. don't want to have * them returning values that don't make sense, or is that ok? */ return 1; /* drop */ } #endif /* CONFIG_ATM_BR2684_IPFILTER */ static void br2684_close_vcc(struct br2684_vcc *brvcc) { pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device); write_lock_irq(&devs_lock); list_del(&brvcc->brvccs); write_unlock_irq(&devs_lock); brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */ brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */ kfree(brvcc); module_put(THIS_MODULE); } /* when AAL5 PDU comes in: */ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) { struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); #if !defined(CONFIG_MACH_FUSIV) struct net_device *net_dev = brvcc->device; struct br2684_dev *brdev = BRPRIV(net_dev); #else struct net_device *net_dev = NULL; struct br2684_dev *brdev = NULL; if (brvcc) { net_dev = brvcc->device; if (net_dev) brdev = BRPRIV(net_dev); else return; } else return; #endif pr_debug("br2684_push\n"); if (unlikely(skb == NULL)) { /* skb==NULL means VCC is being destroyed */ br2684_close_vcc(brvcc); if (list_empty(&brdev->brvccs)) { write_lock_irq(&devs_lock); list_del(&brdev->br2684_devs); write_unlock_irq(&devs_lock); #if defined(CONFIG_MACH_FUSIV) #if defined(CONFIG_FUSIV_KERNEL_AP_2_AP) || defined(CONFIG_FUSIV_KERNEL_AP_2_AP_MODULE) if (br2684DelMacAddrFromAP_ptr) { br2684DelMacAddrFromAP_ptr(net_dev->dev_addr); } #endif #endif unregister_netdev(net_dev); free_netdev(net_dev); } #if defined(CONFIG_MACH_FUSIV) if(AtmDeleteVCInfo_ptr != NULL) (*AtmDeleteVCInfo_ptr)(atmvcc->vpi, atmvcc->vci); else printk("\nbr2684: atmdriver_lkm not initialized properly...\n"); #endif return; } skb_debug(skb); atm_return(atmvcc, skb->truesize); pr_debug("skb from brdev %p\n", brdev); if (brvcc->encaps == e_llc) { #if !defined(CONFIG_MACH_FUSIV) if (skb->len > 7 && skb->data[7] == 0x01) __skb_trim(skb, skb->len - 4); /* accept packets that have "ipv[46]" in the snap header */ if ((skb->len >= (sizeof(llc_oui_ipv4))) && (memcmp (skb->data, llc_oui_ipv4, sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) { if (memcmp (skb->data + 6, ethertype_ipv6, sizeof(ethertype_ipv6)) == 0) skb->protocol = htons(ETH_P_IPV6); else if (memcmp (skb->data + 6, ethertype_ipv4, sizeof(ethertype_ipv4)) == 0) skb->protocol = htons(ETH_P_IP); else goto error; skb_pull(skb, sizeof(llc_oui_ipv4)); skb_reset_network_header(skb); skb->pkt_type = PACKET_HOST; /* * Let us waste some time for checking the encapsulation. * Note, that only 7 char is checked so frames with a valid FCS * are also accepted (but FCS is not checked of course). */ } else if ((skb->len >= sizeof(llc_oui_pid_pad)) && (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) { skb_pull(skb, sizeof(llc_oui_pid_pad)); skb->protocol = eth_type_trans(skb, net_dev); } else goto error; #else skb->pkt_type = PACKET_HOST; skb->protocol = eth_type_trans(skb, net_dev); #endif } else { /* e_vc */ #if !defined(CONFIG_MACH_FUSIV) if (brdev->payload == p_routed) { struct iphdr *iph; skb_reset_network_header(skb); iph = ip_hdr(skb); if (iph->version == 4) skb->protocol = htons(ETH_P_IP); else if (iph->version == 6) skb->protocol = htons(ETH_P_IPV6); else goto error; skb->pkt_type = PACKET_HOST; } else { /* p_bridged */ /* first 2 chars should be 0 */ if (*((u16 *) (skb->data)) != 0) goto error; skb_pull(skb, BR2684_PAD_LEN); skb->protocol = eth_type_trans(skb, net_dev); } #else skb->pkt_type = PACKET_HOST; skb->protocol = eth_type_trans(skb, net_dev); #endif } #ifdef CONFIG_ATM_BR2684_IPFILTER if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) goto dropped; #endif /* CONFIG_ATM_BR2684_IPFILTER */ skb->dev = net_dev; ATM_SKB(skb)->vcc = atmvcc; /* needed ? */ pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol)); skb_debug(skb); /* Adopted from 2.4 BSP */ if (!(net_dev->flags & IFF_MULTICAST) && (skb->pkt_type == PACKET_MULTICAST)) { /* drop multicast packets */ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32) brdev->stats.rx_dropped++; #else struct net_device *dev = skb->dev; dev->stats.rx_dropped++; #endif dev_kfree_skb(skb); return; } /*165001*/ /* sigh, interface is down? */ if (unlikely(!(net_dev->flags & IFF_UP))) goto dropped; net_dev->stats.rx_packets++; net_dev->stats.rx_bytes += skb->len; memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); #ifdef CONFIG_WAN_VLAN_SUPPORT if(g_br2684_tag_vlan_enable) { br2684_remove_vlan_tag_rcv(skb, brdev, 0); } #endif netif_rx(skb); return; dropped: net_dev->stats.rx_dropped++; goto free_skb; #if !defined(CONFIG_MACH_FUSIV) error: net_dev->stats.rx_errors++; #endif free_skb: dev_kfree_skb(skb); return; } #if defined(CONFIG_IFX_PPA_A6) || defined(CONFIG_IFX_PPA_A5) || defined(CONFIG_IFX_PPA_A4) || defined(CONFIG_IFX_PPA_DATAPATH_MODULE) extern void (*ppa_hook_mpoa_setup)(struct atm_vcc *, int, int); #endif /* * Assign a vcc to a dev * Note: we do not have explicit unassign, but look at _push() */ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg) { struct sk_buff_head queue; int err; struct br2684_vcc *brvcc; struct sk_buff *skb, *tmp; struct sk_buff_head *rq; struct br2684_dev *brdev; struct net_device *net_dev; struct atm_backend_br2684 be; unsigned long flags; if (copy_from_user(&be, arg, sizeof be)) return -EFAULT; brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL); if (!brvcc) return -ENOMEM; write_lock_irq(&devs_lock); net_dev = br2684_find_dev(&be.ifspec); if (net_dev == NULL) { printk(KERN_ERR "br2684: tried to attach to non-existant device\n"); err = -ENXIO; goto error; } brdev = BRPRIV(net_dev); if (atmvcc->push == NULL) { err = -EBADFD; goto error; } if (!list_empty(&brdev->brvccs)) { /* Only 1 VCC/dev right now */ err = -EEXIST; goto error; } if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO || be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps != BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) || be.min_size != 0) { err = -EINVAL; goto error; } pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, brvcc); if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) { unsigned char *esi = atmvcc->dev->esi; #if defined(CONFIG_MACH_FUSIV) atmvcc->dev->esi[5] = 0x1+brdev->number; esi = atmvcc->dev->esi; #endif if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5]) memcpy(net_dev->dev_addr, esi, net_dev->addr_len); else net_dev->dev_addr[2] = 1; } list_add(&brvcc->brvccs, &brdev->brvccs); write_unlock_irq(&devs_lock); brvcc->device = net_dev; brvcc->atmvcc = atmvcc; atmvcc->user_back = brvcc; brvcc->encaps = (enum br2684_encaps)be.encaps; brvcc->old_push = atmvcc->push; brvcc->old_pop = atmvcc->pop; barrier(); atmvcc->push = br2684_push; #if defined(CONFIG_IFX_PPA_A6) || defined(CONFIG_IFX_PPA_A5) || defined(CONFIG_IFX_PPA_A4) || defined(CONFIG_IFX_PPA_DATAPATH_MODULE) if ( ppa_hook_mpoa_setup ){ ppa_hook_mpoa_setup(atmvcc, brdev->payload == p_routed ? 3 : 0, brvcc->encaps == BR2684_ENCAPS_LLC ? 1 : 0); // IPoA or EoA w/o FCS printk(KERN_ERR "[%s] %d ppa_hook_mpoa_setup=%pF\n", __func__, __LINE__, ppa_hook_mpoa_setup); } #endif rq = &sk_atm(atmvcc)->sk_receive_queue; __skb_queue_head_init(&queue); spin_lock_irqsave(&rq->lock, flags); skb_queue_splice_init(rq, &queue); spin_unlock_irqrestore(&rq->lock, flags); skb_queue_walk_safe(&queue, skb, tmp) { struct net_device *dev = skb->dev; dev->stats.rx_bytes -= skb->len; dev->stats.rx_packets--; br2684_push(atmvcc, skb); } __module_get(THIS_MODULE); #if defined(CONFIG_MACH_FUSIV) if(AtmUpdateNewVCInfo_ptr != NULL) { if((err =(*AtmUpdateNewVCInfo_ptr)(be.encaps, atmvcc, ADI_BR2684_MODULE, brdev->net_dev->name)) < 0) { return err; } #if defined(CONFIG_FUSIV_KERNEL_AP_2_AP) || defined(CONFIG_FUSIV_KERNEL_AP_2_AP_MODULE) if (br2684AddMacAddrToAP_ptr) { err = br2684AddMacAddrToAP_ptr( net_dev->dev_addr); if (err < 0) return err; } else { printk("\nbr2684AddMacToAP: Atmdriver_lkm not initialized properly\n"); } #endif } else printk("\nbr2684: Atmdriver_lkm not initialized properly\n"); #endif return 0; error: write_unlock_irq(&devs_lock); kfree(brvcc); return err; } static const struct net_device_ops br2684_netdev_ops = { .ndo_start_xmit = br2684_start_xmit, .ndo_set_mac_address = br2684_mac_addr, .ndo_change_mtu = eth_change_mtu, .ndo_validate_addr = eth_validate_addr, }; static const struct net_device_ops br2684_netdev_ops_routed = { .ndo_start_xmit = br2684_start_xmit, .ndo_set_mac_address = br2684_mac_addr, .ndo_change_mtu = eth_change_mtu }; static int br2684_unregvcc(struct atm_vcc *atmvcc, void __user *arg) { int err; struct br2684_vcc *brvcc; struct br2684_dev *brdev; struct net_device *net_dev; struct atm_backend_br2684 be; if (copy_from_user(&be, arg, sizeof be)) return -EFAULT; write_lock_irq(&devs_lock); net_dev = br2684_find_dev(&be.ifspec); if (net_dev == NULL) { printk(KERN_ERR "br2684: tried to unregister to non-existant device\n"); err = -ENXIO; goto error; } brdev = BRPRIV(net_dev); while (!list_empty(&brdev->brvccs)) { brvcc = list_entry_brvcc(brdev->brvccs.next); br2684_close_vcc(brvcc); } list_del(&brdev->br2684_devs); write_unlock_irq(&devs_lock); unregister_netdev(net_dev); free_netdev(net_dev); atmvcc->push = NULL; vcc_release_async(atmvcc, -ETIMEDOUT); return 0; error: write_unlock_irq(&devs_lock); return err; } static void br2684_setup(struct net_device *netdev) { struct br2684_dev *brdev = BRPRIV(netdev); ether_setup(netdev); brdev->net_dev = netdev; netdev->netdev_ops = &br2684_netdev_ops; INIT_LIST_HEAD(&brdev->brvccs); } static void br2684_setup_routed(struct net_device *netdev) { struct br2684_dev *brdev = BRPRIV(netdev); brdev->net_dev = netdev; netdev->hard_header_len = 0; netdev->netdev_ops = &br2684_netdev_ops_routed; netdev->addr_len = 0; netdev->mtu = 1500; netdev->type = ARPHRD_PPP; netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; netdev->tx_queue_len = 100; INIT_LIST_HEAD(&brdev->brvccs); } static int br2684_create(void __user * arg) { int err; struct net_device *netdev; struct br2684_dev *brdev; struct atm_newif_br2684 ni; enum br2684_payload payload; pr_debug("br2684_create\n"); if (copy_from_user(&ni, arg, sizeof ni)) { return -EFAULT; } if (ni.media & BR2684_FLAG_ROUTED) payload = p_routed; else payload = p_bridged; ni.media &= 0xffff; /* strip flags */ if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) { return -EINVAL; } netdev = alloc_netdev(sizeof(struct br2684_dev), ni.ifname[0] ? ni.ifname : "nas%d", (payload == p_routed) ? br2684_setup_routed : br2684_setup); if (!netdev) return -ENOMEM; brdev = BRPRIV(netdev); pr_debug("registered netdev %s\n", netdev->name); /* open, stop, do_ioctl ? */ err = register_netdev(netdev); if (err < 0) { printk(KERN_ERR "br2684_create: register_netdev failed\n"); free_netdev(netdev); return err; } /* Mark br2684 device */ netdev->priv_flags |= IFF_BR2684; write_lock_irq(&devs_lock); brdev->payload = payload; brdev->number = list_empty(&br2684_devs) ? 1 : BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1; list_add_tail(&brdev->br2684_devs, &br2684_devs); write_unlock_irq(&devs_lock); return 0; } /* * This handles ioctls actually performed on our vcc - we must return * -ENOIOCTLCMD for any unrecognized ioctl */ static int br2684_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct atm_vcc *atmvcc = ATM_SD(sock); void __user *argp = (void __user *)arg; atm_backend_t b; int err; switch (cmd) { case ATM_SETBACKEND: case ATM_NEWBACKENDIF: case ATM_DELBACKENDIF: err = get_user(b, (atm_backend_t __user *) argp); if (err) return -EFAULT; if (b != ATM_BACKEND_BR2684) return -ENOIOCTLCMD; if (!capable(CAP_NET_ADMIN)) return -EPERM; if (cmd == ATM_SETBACKEND) return br2684_regvcc(atmvcc, argp); else if (cmd == ATM_DELBACKENDIF) return br2684_unregvcc(atmvcc, argp); else return br2684_create(argp); #ifdef CONFIG_ATM_BR2684_IPFILTER case BR2684_SETFILT: if (atmvcc->push != br2684_push) return -ENOIOCTLCMD; if (!capable(CAP_NET_ADMIN)) return -EPERM; err = br2684_setfilt(atmvcc, argp); return err; #endif /* CONFIG_ATM_BR2684_IPFILTER */ #ifdef CONFIG_WAN_VLAN_SUPPORT case ATM_BR2684_VLAN_CONFIG: { int opt=0; //MOD_INC_USE_COUNT; __module_get(THIS_MODULE); err = get_user(opt, (int *) arg); if (err) return -EFAULT; if(opt==1) { g_br2684_tag_vlan_enable = 1; } else { g_br2684_tag_vlan_enable = 0; } //MOD_DEC_USE_COUNT; module_put(THIS_MODULE); return err; } case ATM_BR2684_VLAN_VCC_CONFIG: //MOD_INC_USE_COUNT; __module_get(THIS_MODULE); err = br2684_setvlansettings(atmvcc, arg); //MOD_DEC_USE_COUNT; module_put(THIS_MODULE); return err; #endif #if defined(CONFIG_MACH_FUSIV) case ATM_DEL_INTERFACE: { atm_backend_t b; err = get_user(b, (atm_backend_t __user *) argp); if (err) return -EFAULT; br2684_delete(atmvcc, argp); } return 0; #endif } return -ENOIOCTLCMD; } static struct atm_ioctl br2684_ioctl_ops = { .owner = THIS_MODULE, .ioctl = br2684_ioctl, }; #ifdef CONFIG_PROC_FS static void *br2684_seq_start(struct seq_file *seq, loff_t * pos) __acquires(devs_lock) { read_lock(&devs_lock); return seq_list_start(&br2684_devs, *pos); } static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos) { return seq_list_next(v, &br2684_devs, pos); } static void br2684_seq_stop(struct seq_file *seq, void *v) __releases(devs_lock) { read_unlock(&devs_lock); } static int br2684_seq_show(struct seq_file *seq, void *v) { const struct br2684_dev *brdev = list_entry(v, struct br2684_dev, br2684_devs); const struct net_device *net_dev = brdev->net_dev; const struct br2684_vcc *brvcc; seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n", net_dev->name, brdev->number, net_dev->dev_addr, brdev->mac_was_set ? "set" : "auto"); list_for_each_entry(brvcc, &brdev->brvccs, brvccs) { seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s" ", failed copies %u/%u" "\n", brvcc->atmvcc->dev->number, brvcc->atmvcc->vpi, brvcc->atmvcc->vci, (brvcc->encaps == e_llc) ? "LLC" : "VC", (brdev->payload == p_bridged) ? "bridged" : "routed", brvcc->copies_failed, brvcc->copies_needed); #ifdef CONFIG_ATM_BR2684_IPFILTER #define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte] #define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3) if (brvcc->filter.netmask != 0) seq_printf(seq, " filter=%d.%d.%d.%d/" "%d.%d.%d.%d\n", bs(prefix), bs(netmask)); #undef bs #undef b1 #endif /* CONFIG_ATM_BR2684_IPFILTER */ } return 0; } static const struct seq_operations br2684_seq_ops = { .start = br2684_seq_start, .next = br2684_seq_next, .stop = br2684_seq_stop, .show = br2684_seq_show, }; static int br2684_proc_open(struct inode *inode, struct file *file) { return seq_open(file, &br2684_seq_ops); } static const struct file_operations br2684_proc_ops = { .owner = THIS_MODULE, .open = br2684_proc_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; extern struct proc_dir_entry *atm_proc_root; /* from proc.c */ #endif /* CONFIG_PROC_FS */ static int __init br2684_init(void) { #ifdef CONFIG_PROC_FS struct proc_dir_entry *p; p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops); if (p == NULL) return -ENOMEM; #endif register_atm_ioctl(&br2684_ioctl_ops); return 0; } static void __exit br2684_exit(void) { struct net_device *net_dev; struct br2684_dev *brdev; struct br2684_vcc *brvcc; deregister_atm_ioctl(&br2684_ioctl_ops); #ifdef CONFIG_PROC_FS remove_proc_entry("br2684", atm_proc_root); #endif while (!list_empty(&br2684_devs)) { net_dev = list_entry_brdev(br2684_devs.next); brdev = BRPRIV(net_dev); while (!list_empty(&brdev->brvccs)) { brvcc = list_entry_brvcc(brdev->brvccs.next); br2684_close_vcc(brvcc); } list_del(&brdev->br2684_devs); unregister_netdev(net_dev); free_netdev(net_dev); } } #if defined(CONFIG_MACH_FUSIV) /* Just temporary -need to modify a lot */ struct atm_vcc * adi_getvcc(char *ifname) { struct list_head *lh; struct br2684_dev *brdev; struct br2684_vcc *br_vcc; struct net_device *net_dev; list_for_each(lh, &br2684_devs) { net_dev = list_entry_brdev(lh); if (strcmp(net_dev->name, ifname) == 0 ) { brdev = BRPRIV(net_dev); br_vcc = list_entry_brvcc(brdev->brvccs.next); return br_vcc->atmvcc; } } return NULL; } int get_br2684_encap(struct atm_vcc *atmvcc) { struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); if(brvcc->encaps == e_llc ) return 1; else return 0; } int get_br2684_overhead(struct net_device *net_dev) { struct br2684_dev *brdev = NULL; struct br2684_vcc *brvcc = NULL; brdev = BRPRIV(net_dev); if(brdev == NULL) return 0; else { brvcc = list_entry_brvcc(brdev->brvccs.next); if(brvcc == NULL) return 0; } if(brdev->payload == BR2684_PAYLOAD_BRIDGED) { if (brvcc->encaps == e_llc) return LLC_BRIDGED_OVERHEAD; else return VC_BRIDGED_OVERHEAD; } else { if (brvcc->encaps == e_llc) return LLC_ROUTED_OVERHEAD; else return VC_ROUTED_OVERHEAD; } } struct net_device* get_br2684_ifname(struct atm_vcc *atmvcc) { struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); if (!brvcc) return NULL; return brvcc->device; } EXPORT_SYMBOL(adi_getvcc); EXPORT_SYMBOL(get_br2684_encap); EXPORT_SYMBOL(get_br2684_ifname); EXPORT_SYMBOL(get_br2684_overhead); #endif #if defined(CONFIG_MACH_FUSIV) EXPORT_SYMBOL(AtmUpdateNewVCInfo_ptr); EXPORT_SYMBOL(AtmUpdateVCInfo_ptr); EXPORT_SYMBOL(AtmDeleteVCInfo_ptr); #if defined(CONFIG_FUSIV_KERNEL_AP_2_AP) || defined(CONFIG_FUSIV_KERNEL_AP_2_AP_MODULE) EXPORT_SYMBOL(br2684AddMacAddrToAP_ptr); EXPORT_SYMBOL(br2684DelMacAddrFromAP_ptr); #endif #endif #if defined(CONFIG_FUSIV_KERNEL_PPPOE_RELAY) || defined(CONFIG_FUSIV_KERNEL_PPPOE_RELAY_MODULE) EXPORT_SYMBOL(checkPPPOERelayStatus_ptr); EXPORT_SYMBOL(getConfigModuleId_ptr); #endif #if defined(CONFIG_IFX_PPA_API) || defined(CONFIG_IFX_PPA_API_MODULE) int ppa_br2684_get_vcc(struct net_device *netdev, struct atm_vcc **pvcc) { if ( netdev && (uint32_t)br2684_start_xmit == (uint32_t)netdev->netdev_ops->ndo_start_xmit) { struct br2684_dev *brdev; struct br2684_vcc *brvcc; brdev = (struct br2684_dev *)BRPRIV(netdev); brvcc = list_empty(&brdev->brvccs) ? NULL : list_entry(brdev->brvccs.next, struct br2684_vcc, brvccs); if ( brvcc ) { *pvcc = brvcc->atmvcc; return 0; } } return -1; } int32_t ppa_if_is_br2684(struct net_device *netdev, char *ifname) { if ( !netdev ) { netdev = dev_get_by_name(&init_net,ifname); if ( !netdev ) return 0; // can not get else dev_put(netdev); } return (uint32_t)br2684_start_xmit == (uint32_t)netdev->netdev_ops->ndo_start_xmit ? 1 : 0; } int32_t ppa_if_is_ipoa(struct net_device *netdev, char *ifname) { if ( !netdev ) { netdev = dev_get_by_name(&init_net,ifname); if ( !netdev ) return 0; else dev_put(netdev); } if ( ppa_if_is_br2684(netdev, ifname) ) { struct br2684_dev *brdev; //struct br2684_vcc *brvcc; // #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) //brdev = (struct br2684_dev *)netif->priv; brdev = BRPRIV(netdev); // #else // brdev = (struct br2684_dev *)((char *)(netif) - (unsigned long)(&((struct br2684_dev *)0)->net_dev)); // #endif //brvcc = list_empty(&brdev->brvccs) ? NULL : list_entry(brdev->brvccs.next, struct br2684_vcc, brvccs); //return brvcc && brvcc->payload == p_routed ? 1 : 0; return brdev && brdev->payload == p_routed ? 1 : 0; } return 0; } #endif #ifdef CONFIG_WAN_VLAN_SUPPORT int br2684_vlan_dev_get_vid(struct net_device *dev, uint16_t *vid) { int ret=0; struct br2684_dev *brdev; if (!dev || !vid) return -EINVAL; dev_hold(dev); brdev = BRPRIV(dev); if (brdev->vlan.tag_vlan_enable) { *vid = brdev->vlan.vlan_vci; } else { ret=-EINVAL; } pr_debug("(%s) Returning VLAN Id [%d]; VLAN enable [%d] for [%s]\n", __func__, *vid, brdev->vlan.tag_vlan_enable, dev->name); dev_put(dev); return ret; } EXPORT_SYMBOL(br2684_vlan_dev_get_vid); #endif module_init(br2684_init); module_exit(br2684_exit); MODULE_AUTHOR("Marcell GAL"); MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5"); MODULE_LICENSE("GPL"); #if defined(CONFIG_IFX_PPA_API_MODULE) EXPORT_SYMBOL(ppa_if_is_ipoa); EXPORT_SYMBOL(ppa_if_is_br2684); EXPORT_SYMBOL(ppa_br2684_get_vcc); #endif