X-Git-Url: http://git.rot13.org/?p=bcm963xx.git;a=blobdiff_plain;f=kernel%2Flinux%2Fnet%2Fatm%2Fbr2684.c;h=0bbdc0380f13f96b98444cc83b932dba46cf42af;hp=8b9f822763d3865c0a5af6c3b44440761f0bec1c;hb=6adeba4d92a546ebbadde2562283ee6b984b22c1;hpb=a69849c98808437716b821267cd97529c56f45b0 diff --git a/kernel/linux/net/atm/br2684.c b/kernel/linux/net/atm/br2684.c index 8b9f8227..0bbdc038 100755 --- a/kernel/linux/net/atm/br2684.c +++ b/kernel/linux/net/atm/br2684.c @@ -34,6 +34,10 @@ Author: Marcell GAL, 2000, XDSL Ltd, Hungary * if we need space for the header */ /* #define FASTER_VERSION */ +//#define VLAN_DEBUG +//#define SKB_DEBUG + +//#define PTM_ETH_FCS #ifdef DEBUG #define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args) @@ -41,6 +45,17 @@ Author: Marcell GAL, 2000, XDSL Ltd, Hungary #define DPRINTK(format, args...) #endif +#ifdef PTM_ETH_FCS +typedef unsigned long uint32; +typedef unsigned char uint8; + +static uint32 crc32( uint8 *pdata, uint nbytes, uint32 crc); +#endif + +#if defined(CONFIG_BCM_VDSL) +extern int g_nPtmTraffic; +#endif + #ifdef SKB_DEBUG static void skb_debug(const struct sk_buff *skb) { @@ -84,6 +99,11 @@ struct br2684_vcc { When turned on, all non-PPPoE traffic will be dropped on this PVC */ int proto_filter; +#ifdef SUPPORT_VLAN + unsigned short vlan_id; /* vlan id (0-4096) */ +#endif // SUPPORT_VLAN + + #endif }; @@ -155,6 +175,81 @@ static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) return NULL; } +#ifdef SUPPORT_VLAN +#include +/** + * vlan_tag_insert - regular VLAN tag inserting + * @skb: skbuff to tag + * @tag: VLAN tag to insert + * + * Inserts the VLAN tag into @skb as part of the payload + * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + */ +#define ATM_HEADER_LEN 10 +#define ATM_AND_MAC_LEN ((ATM_HEADER_LEN) + (2 * VLAN_ETH_ALEN)) +#define MAC_LEN (2 * VLAN_ETH_ALEN) + +struct atm_vlan_ethhdr { + unsigned char h_atm_stuff[ATM_HEADER_LEN]; /* atm stuff 10 bytes */ + unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ + unsigned char h_source[ETH_ALEN]; /* source ether addr */ + unsigned short h_vlan_proto; /* Should always be 0x8100 */ + unsigned short h_vlan_TCI; /* Encapsulates priority and VLAN ID */ + unsigned short h_vlan_encapsulated_proto; /* packet type ID field (or len) */ +}; + +static inline struct sk_buff *vlan_tag_insert(struct sk_buff *skb, unsigned short tag) +{ + struct atm_vlan_ethhdr *veth; + + if (skb_headroom(skb) < VLAN_HLEN) { + struct sk_buff *sk_tmp = skb; + skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN); + kfree_skb(sk_tmp); + if (!skb) { + printk(KERN_ERR "vlan: failed to realloc headroom\n"); + return NULL; + } + } else { + skb = skb_unshare(skb, GFP_ATOMIC); + if (!skb) { + printk(KERN_ERR "vlan: failed to unshare skbuff\n"); + return NULL; + } + } + + veth = (struct atm_vlan_ethhdr *)skb_push(skb, VLAN_HLEN); + +#ifdef CONFIG_BCM_VDSL + if (!g_nPtmTraffic) { + /* Move the mac addresses to the beginning of the new header. */ + memmove(skb->data, skb->data + VLAN_HLEN, (2 * VLAN_ETH_ALEN) + ATM_HEADER_LEN); + } + else { + /* Move the mac addresses to the beginning of the new header. */ + memmove(skb->data, skb->data + VLAN_HLEN, (2 * VLAN_ETH_ALEN)) ; + } +#else + memmove(skb->data, skb->data + VLAN_HLEN, (2 * VLAN_ETH_ALEN)) ; +#endif + + /* first, the ethernet type */ + veth->h_vlan_proto = __constant_htons(ETH_P_8021Q); + + /* now, the tag */ + veth->h_vlan_TCI = htons(tag); + + skb->protocol = __constant_htons(ETH_P_8021Q); + skb->mac.raw -= VLAN_HLEN; + skb->nh.raw -= VLAN_HLEN; + + return skb; +} +#endif // SUPPORT_VLAN + /* * 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, @@ -163,71 +258,149 @@ static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, struct br2684_vcc *brvcc) { - struct atm_vcc *atmvcc; + struct atm_vcc *atmvcc; + +#if defined(CONFIG_BCM_VDSL) + if( !g_nPtmTraffic ) { +#endif #ifdef FASTER_VERSION - if (brvcc->encaps == e_llc) - memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8); - /* last 2 bytes of llc_oui_pid_pad are managed by header routines; - yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad) - */ + if (brvcc->encaps == e_llc) + memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8); + /* last 2 bytes of llc_oui_pid_pad are managed by header routines; + yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad) + */ #else - int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; - 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; - } - skb_push(skb, minheadroom); - if (brvcc->encaps == e_llc) - memcpy(skb->data, llc_oui_pid_pad, 10); - else - memset(skb->data, 0, 2); + int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; + 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; + } + skb_push(skb, minheadroom); + if (brvcc->encaps == e_llc) + memcpy(skb->data, llc_oui_pid_pad, 10); + else + memset(skb->data, 0, 2); #endif /* FASTER_VERSION */ #if defined(CONFIG_MIPS_BRCM) - if (skb->len < MIN_PKT_SIZE) - { - struct sk_buff *skb2=skb_copy_expand(skb, 0, MIN_PKT_SIZE - skb->len, GFP_ATOMIC); - dev_kfree_skb(skb); - if (skb2 == NULL) { - brvcc->copies_failed++; - return 0; - } - skb = skb2; - memset(skb->tail, 0, MIN_PKT_SIZE - skb->len); - skb_put(skb, MIN_PKT_SIZE - skb->len); - } + if (skb->len < MIN_PKT_SIZE) + { + struct sk_buff *skb2=skb_copy_expand(skb, 0, MIN_PKT_SIZE - skb->len, GFP_ATOMIC); + dev_kfree_skb(skb); + if (skb2 == NULL) { + brvcc->copies_failed++; + return 0; + } + skb = skb2; + memset(skb->tail, 0, MIN_PKT_SIZE - skb->len); + skb_put(skb, MIN_PKT_SIZE - skb->len); + } +#endif +#if defined(CONFIG_BCM_VDSL) + } // g_nPtmTrafffic + else + { +#define MIN_PTM_PKT_LEN 60 // need to expand packet for the VDSL phisical layer to work + if (skb->len < MIN_PTM_PKT_LEN) + { + struct sk_buff *skb2=skb_copy_expand(skb, 0, MIN_PKT_SIZE - skb->len, GFP_ATOMIC); + dev_kfree_skb(skb); + if (skb2 == NULL) { + brvcc->copies_failed++; + return 0; + } + skb = skb2; + memset(skb->tail, 0, MIN_PKT_SIZE - skb->len); + skb_put(skb, MIN_PKT_SIZE - skb->len); + } + } #endif - skb_debug(skb); +#ifdef SUPPORT_VLAN +#ifdef VLAN_DEBUG + printk("=====> br2684_xmit_vcc bef add vlan tag, skb->len=0x%04x\n", skb->len); + skb_debug(skb); +#endif // VLAN_DEBUG + + /* Construct the second two bytes. This field looks something + * like: + * usr_priority: 3 bits (high bits) + * CFI 1 bit + * VLAN ID 12 bits (low bits) + */ + //brvcc->vlan_id |= vlan_dev_get_egress_qos_mask(dev, skb); + /* bit 3-0 of the 32-bit nfmark is the atm priority, set by iptables + * bit 7-4 is the Ethernet switch physical port number, set by lan port drivers. + * bit 8-11 is the wanVlan priority bits + */ + if (brvcc->vlan_id != 0xffff) { + brvcc->vlan_id &= 0xffff0fff; // clear the priority bits first + // if bit 8-11 is set (none zeros), add in the priority bits + if (skb->nfmark & 0x0000f000) { + brvcc->vlan_id |= (skb->nfmark & 0x0000f000); + } + skb = vlan_tag_insert(skb, brvcc->vlan_id) ; + if (!skb) { + brdev->stats.tx_dropped++; + return 1; + } +#ifdef VLAN_DEBUG + printk("=====> br2684_xmit_vcc aft add vlan tag, skb->len=%d\n", skb->len); + skb_debug(skb); +#endif // VLAN_DEBUG + } +#endif // SUPPORT_VLAN + +#if defined(CONFIG_BCM_VDSL) +#ifdef PTM_ETH_FCS + if( g_nPtmTraffic ) { + union crc_32_tag + { + int i; + char ch[4]; + } crc_32; + + crc_32.i = ~crc32(skb->data, skb->len, 0xffffffff); + /* crc bytes put in the memory in reverse order */ + skb->data[skb->len] = crc_32.ch[3]; + skb->data[skb->len + 1] = crc_32.ch[2]; + skb->data[skb->len + 2] = crc_32.ch[1]; + skb->data[skb->len + 3] = crc_32.ch[0]; + + skb->len += 4; // extra four bytes for ethernet checksum +} +#endif +#endif - ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; - DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); - if (!atm_may_send(atmvcc, skb->truesize)) { - /* we free this here for now, because we cannot know in a higher - layer whether the skb point it supplied wasn't freed yet. - now, it always is. - */ - dev_kfree_skb(skb); - return 0; - } - atomic_add(skb->truesize, &atmvcc->sk->sk_wmem_alloc); - ATM_SKB(skb)->atm_options = atmvcc->atm_options; - brdev->stats.tx_packets++; - brdev->stats.tx_bytes += skb->len; + + ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; + DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); + if (!atm_may_send(atmvcc, skb->truesize)) { + /* we free this here for now, because we cannot know in a higher + layer whether the skb point it supplied wasn't freed yet. + now, it always is. + */ + dev_kfree_skb(skb); + return 0; + } + atomic_add(skb->truesize, &atmvcc->sk->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = atmvcc->atm_options; + brdev->stats.tx_packets++; + brdev->stats.tx_bytes += skb->len; #if defined(CONFIG_MIPS_BRCM) - if (atmvcc->send(atmvcc, skb) != 0) - brdev->stats.tx_dropped++; + if (atmvcc->send(atmvcc, skb) != 0) + brdev->stats.tx_dropped++; #else - atmvcc->send(atmvcc, skb); + atmvcc->send(atmvcc, skb); #endif - return 1; + return 1; } static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb, @@ -241,7 +414,6 @@ static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct br2684_dev *brdev = BRPRIV(dev); struct br2684_vcc *brvcc; - DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst); read_lock(&devs_lock); brvcc = pick_outgoing_vcc(skb, brdev); @@ -259,13 +431,18 @@ static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) if (brvcc->proto_filter & FILTER_PPPOE) { if ((skb->protocol != htons(ETH_P_PPP_DISC)) && (skb->protocol != htons(ETH_P_PPP_SES))) { DPRINTK("non-PPPOE packet dropped on TX dev %s\n", dev->name); - brdev->stats.tx_dropped++; dev_kfree_skb(skb); read_unlock(&devs_lock); return 0; } } #endif + +#ifdef VLAN_DEBUG + if (brvcc->vlan_id != 0xffff) + printk("=====> br2684_start_xmit vlan_id=0x%04x\n", brvcc->vlan_id); +#endif // VLAN_DEBUG + if (!br2684_xmit_vcc(skb, brdev, brvcc)) { /* * We should probably use netif_*_queue() here, but that @@ -452,7 +629,12 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); struct net_device *net_dev = brvcc->device; struct br2684_dev *brdev = BRPRIV(net_dev); +#if !defined(CONFIG_BCM_VDSL) int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN; +#else + /* Ethernet packets from PTM traffic will not have an RFC header in place */ + int plen = ( !g_nPtmTraffic ) ? sizeof(llc_oui_pid_pad) + ETH_HLEN : ETH_HLEN; +#endif DPRINTK("br2684_push\n"); @@ -472,9 +654,11 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) //skb->__unused=FROM_WAN; #endif - skb_debug(skb); atm_return(atmvcc, skb->truesize); DPRINTK("skb from brdev %p\n", brdev); +#if defined(CONFIG_BCM_VDSL) + if ( !g_nPtmTraffic ) { +#endif if (brvcc->encaps == e_llc) { /* let us waste some time for checking the encapsulation. Note, that only 7 char is checked so frames with a valid FCS @@ -502,6 +686,45 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) dev_kfree_skb(skb); /* dev_ not needed? */ return; } +#if defined(CONFIG_BCM_VDSL) + } // !g_nPtmTraffic +#endif + +#ifdef SUPPORT_VLAN + if (brvcc->vlan_id != 0xffff) { /* Vcc was configured to be vlan tagged*/ + unsigned tmp[ATM_AND_MAC_LEN]; +#ifdef VLAN_DEBUG + printk("=====> before removing vlan id\n"); + skb_debug(skb); +#endif + /* + ** There exist a situation where we tag vlan id upstream. But DSLAM sends untagged frame downstream. So we need to check this situation before we move data around + */ + //eddie added if {} +#if defined(CONFIG_BCM_VDSL) + if (!g_nPtmTraffic) { +#endif + if ( skb->data[22] == 0x81 && skb->data[23] == 0x0) { + memcpy(tmp, skb->data, ATM_AND_MAC_LEN); + skb_pull(skb, VLAN_HLEN); + memcpy(skb->data, tmp, ATM_AND_MAC_LEN); + } +#if defined(CONFIG_BCM_VDSL) + } + else { + if ( skb->data[MAC_LEN] == 0x81 && skb->data[MAC_LEN+1] == 0x0) { + memcpy(tmp, skb->data, MAC_LEN); + skb_pull(skb, VLAN_HLEN); + memcpy(skb->data, tmp, MAC_LEN); + } + } +#endif +#ifdef VLAN_DEBUG + printk("=====> after removing vlan id\n"); + skb_debug(skb); +#endif + } +#endif // SUPPORT_VLAN #ifdef FASTER_VERSION /* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier, @@ -529,25 +752,33 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) if (brvcc->proto_filter & FILTER_PPPOE) { if ((skb->protocol != htons(ETH_P_PPP_DISC)) && (skb->protocol != htons(ETH_P_PPP_SES))) { DPRINTK("non-PPPOE packet dropped on RX dev %s\n", net_dev->name); - brdev->stats.rx_dropped++; dev_kfree_skb(skb); return; } } #endif - skb->dev = net_dev; + + skb->dev = net_dev; ATM_SKB(skb)->vcc = atmvcc; /* needed ? */ DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol)); - skb_debug(skb); + if (unlikely(!(net_dev->flags & IFF_UP))) { /* sigh, interface is down */ brdev->stats.rx_dropped++; dev_kfree_skb(skb); return; } + +#ifdef PTM_ETH_FCS +#if defined(CONFIG_BCM_VDSL) + skb->len = (g_nPtmTraffic) ? (skb->len - 4) : skb->len ; +#endif +#endif + brdev->stats.rx_packets++; brdev->stats.rx_bytes += skb->len; memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); + netif_rx(skb); } @@ -613,6 +844,9 @@ Note: we do not have explicit unassign, but look at _push() brvcc->old_push = atmvcc->push; #if defined(CONFIG_MIPS_BRCM) brvcc->proto_filter |= be.proto_filter; +#ifdef SUPPORT_VLAN + brvcc->vlan_id = be.vlan_id; +#endif // SUPPORT_VLAN #endif barrier(); atmvcc->push = br2684_push; @@ -876,6 +1110,106 @@ static void __exit br2684_exit(void) } } +#ifdef PTM_ETH_FCS +/******************************************************************************* + * crc32 + * + * Computes a crc32 over the input data using the polynomial: + * + * x^32+x^26+x^23+x^22+x^16+x^12+x^11+X^10+x^8+x^7+x^5+x^4+x^2+x+1 + * + * The caller provides the initial value (either CRC32_INIT_VALUE + * or the previous returned value) to allow for processing of + * discontiguous blocks of data. When generating the CRC the + * caller is responsible for complementing the final return value + * and inserting it into the byte stream. When checking, a final + * return value of CRC32_GOOD_VALUE indicates a valid CRC. + * + * Reference: Dallas Semiconductor Application Note 27 + * Williams, Ross N., "A Painless Guide to CRC Error Detection Algorithms", + * ver 3, Aug 1993, ross@guest.adelaide.edu.au, Rocksoft Pty Ltd., + * ftp://ftp.rocksoft.com/clients/rocksoft/papers/crc_v3.txt + * + ******************************************************************************/ + +static uint32 crc32_table[256] = { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, + 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, + 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, + 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, + 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, + 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, + 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, + 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, + 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, + 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, + 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, + 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, + 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, + 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, + 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, + 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, + 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, + 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, + 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, + 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, + 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, + 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, + 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, + 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, + 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, + 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, + 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, + 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, + 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, + 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, + 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, + 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, + 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, + 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D +}; + +#define CRC_INNER_LOOP(n, c, x) \ + (c) = ((c) >> 8) ^ crc##n##_table[((c) ^ (x)) & 0xff] + +uint32 crc32( uint8 *pdata, uint nbytes, uint32 crc) +{ + while (nbytes-- > 0) + CRC_INNER_LOOP(32, crc, *pdata++); + return crc; +} +#endif + module_init(br2684_init); module_exit(br2684_exit);