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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Emulates Linux sk buffers using hartik net buffers... */ |
| 2 | |||
| 3 | #include <kernel/kern.h> |
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| 4 | #include <semaphore.h> |
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| 5 | |||
| 6 | #include "../net/netbuff.h" |
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| 7 | #include "../net/eth_priv.h" |
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| 8 | |||
| 9 | #include"linux/skbuff.h" |
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| 10 | |||
| 11 | #define LOWLEV_TX_BUFFERS 50 |
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| 12 | #define LOWLEV_RX_BUFFERS 50 |
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| 13 | struct netbuff rxbuff; |
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| 14 | struct netbuff lowlevel_txbuff; |
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| 15 | |||
| 16 | void skb_init(void) |
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| 17 | { |
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| 18 | netbuff_init(&lowlevel_txbuff, LOWLEV_TX_BUFFERS, ETH_MAX_LEN); |
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| 19 | netbuff_init(&rxbuff, LOWLEV_RX_BUFFERS, ETH_MAX_LEN); |
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| 20 | } |
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| 21 | |||
| 22 | struct sk_buff *dev_alloc_skb(unsigned int len) |
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| 23 | { |
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| 24 | struct sk_buff *skb; |
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| 25 | |||
| 26 | kern_cli(); |
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| 27 | skb = kern_alloc(sizeof(struct sk_buff)); |
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| 28 | kern_sti(); |
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| 29 | |||
| 30 | skb->data = netbuff_get(&rxbuff, NON_BLOCK); |
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| 31 | if (skb->data == NULL) { |
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| 32 | return NULL; |
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| 33 | } |
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| 34 | skb->head = skb->data; |
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| 35 | skb->tail = skb->data; |
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| 36 | skb->len = 0; |
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| 203 | pj | 37 | skb->truesize = len; |
| 2 | pj | 38 | |
| 39 | return skb; |
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| 40 | } |
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| 41 | |||
| 42 | void skb_reserve(struct sk_buff *skb, int len) |
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| 43 | { |
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| 203 | pj | 44 | /* changed by PJ ... before it did nothing... */ |
| 45 | skb->data+=len; |
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| 46 | skb->tail+=len; |
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| 2 | pj | 47 | } |
| 48 | |||
| 49 | unsigned char *skb_put(struct sk_buff *skb, int len) |
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| 50 | { |
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| 51 | unsigned char *tmp=skb->tail; |
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| 52 | |||
| 53 | skb->tail+=len; |
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| 54 | skb->len+=len; |
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| 55 | |||
| 56 | return tmp; |
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| 57 | } |
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| 58 | |||
| 59 | void skb_queue_head_init(struct sk_buff_head *list) |
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| 60 | { |
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| 61 | list->prev = (struct sk_buff *)list; |
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| 62 | list->next = (struct sk_buff *)list; |
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| 63 | list->qlen = 0; |
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| 64 | } |
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| 203 | pj | 65 | |
| 66 | struct sk_buff *skb_realloc_headroom(struct sk_buff *skb, int newheadroom) |
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| 67 | { |
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| 68 | struct sk_buff *n; |
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| 69 | unsigned long offset; |
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| 70 | int headroom = skb_headroom(skb); |
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| 71 | |||
| 72 | /* |
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| 73 | * Allocate the copy buffer |
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| 74 | */ |
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| 75 | |||
| 76 | n=alloc_skb(skb->truesize+newheadroom-headroom, GFP_ATOMIC); |
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| 77 | if(n==NULL) |
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| 78 | return NULL; |
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| 79 | |||
| 80 | skb_reserve(n,newheadroom); |
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| 81 | |||
| 82 | /* |
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| 83 | * Shift between the two data areas in bytes |
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| 84 | */ |
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| 85 | |||
| 86 | offset=n->data-skb->data; |
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| 87 | |||
| 88 | /* Set the tail pointer and length */ |
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| 89 | skb_put(n,skb->len); |
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| 90 | /* Copy the bytes */ |
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| 91 | memcpy(n->data,skb->data,skb->len); |
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| 92 | n->list=NULL; |
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| 93 | // n->sk=NULL; |
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| 94 | // n->priority=skb->priority; |
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| 95 | n->protocol=skb->protocol; |
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| 96 | n->dev=skb->dev; |
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| 97 | // n->dst=dst_clone(skb->dst); |
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| 98 | // n->h.raw=skb->h.raw+offset; |
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| 99 | // n->nh.raw=skb->nh.raw+offset; |
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| 100 | // n->mac.raw=skb->mac.raw+offset; |
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| 101 | memcpy(n->cb, skb->cb, sizeof(skb->cb)); |
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| 102 | n->used=skb->used; |
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| 103 | // n->is_clone=0; |
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| 104 | // atomic_set(&n->users, 1); |
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| 105 | // n->pkt_type=skb->pkt_type; |
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| 106 | // n->stamp=skb->stamp; |
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| 107 | // n->destructor = NULL; |
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| 108 | // n->security=skb->security; |
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| 109 | #ifdef CONFIG_IP_FIREWALL |
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| 110 | n->fwmark = skb->fwmark; |
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| 111 | #endif |
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| 112 | |||
| 113 | return n; |
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| 114 | } |