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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 629 | giacomo | 1 | #ifndef __SKBUFF__ |
| 2 | #define __SKBUFF__ |
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| 3 | |||
| 4 | #include <linux/compatib.h> |
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| 5 | #include "ll/sys/cdefs.h" |
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| 6 | |||
| 7 | __BEGIN_DECLS |
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| 8 | |||
| 9 | #define HAVE_ALLOC_SKB /* For the drivers to know */ |
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| 10 | #define HAVE_ALIGNABLE_SKB /* Ditto 8) */ |
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| 11 | |||
| 12 | |||
| 13 | #define FREE_READ 1 |
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| 14 | #define FREE_WRITE 0 |
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| 15 | |||
| 16 | #define CHECKSUM_NONE 0 |
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| 17 | #define CHECKSUM_HW 1 |
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| 18 | #define CHECKSUM_UNNECESSARY 2 |
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| 19 | |||
| 20 | |||
| 21 | struct sk_buff_head |
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| 22 | { |
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| 23 | struct sk_buff * next; |
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| 24 | struct sk_buff * prev; |
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| 25 | __u32 qlen; /* Must be same length as a pointer |
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| 26 | for using debugging */ |
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| 27 | #if CONFIG_SKB_CHECK |
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| 28 | int magic_debug_cookie; |
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| 29 | #endif |
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| 30 | }; |
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| 31 | |||
| 32 | |||
| 33 | struct sk_buff |
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| 34 | { |
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| 35 | struct sk_buff * next; /* Next buffer in list */ |
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| 36 | struct sk_buff * prev; /* Previous buffer in list */ |
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| 37 | struct sk_buff_head * list; /* List we are on */ |
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| 38 | #if CONFIG_SKB_CHECK |
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| 39 | int magic_debug_cookie; |
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| 40 | #endif |
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| 41 | #if 0 |
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| 42 | struct sk_buff *link3; /* Link for IP protocol level buffer chains */ |
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| 43 | #endif |
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| 44 | |||
| 45 | #if 0 |
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| 46 | struct sock *sk; /* Socket we are owned by */ |
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| 47 | #endif |
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| 48 | struct device *dev; /* Device we arrived on/are leaving by */ |
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| 49 | #ifdef NOTWORK |
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| 50 | unsigned long when; /* used to compute rtt's */ |
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| 51 | struct timeval stamp; /* Time we arrived */ |
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| 52 | union |
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| 53 | { |
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| 54 | struct tcphdr *th; |
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| 55 | struct ethhdr *eth; |
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| 56 | struct iphdr *iph; |
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| 57 | struct udphdr *uh; |
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| 58 | unsigned char *raw; |
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| 59 | /* for passing file handles in a unix domain socket */ |
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| 60 | void *filp; |
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| 61 | } h; |
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| 62 | |||
| 63 | union |
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| 64 | { |
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| 65 | /* As yet incomplete physical layer views */ |
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| 66 | unsigned char *raw; |
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| 67 | struct ethhdr *ethernet; |
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| 68 | } mac; |
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| 69 | |||
| 70 | struct iphdr *ip_hdr; /* For IPPROTO_RAW */ |
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| 71 | |||
| 72 | #endif /*NOTWORK*/ |
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| 73 | |||
| 74 | char cb[48]; /* added by PJ */ |
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| 75 | |||
| 76 | unsigned long len; /* Length of actual data */ |
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| 77 | unsigned long csum; /* Checksum */ |
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| 78 | #if 0 |
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| 79 | __u32 saddr; /* IP source address */ |
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| 80 | __u32 daddr; /* IP target address */ |
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| 81 | __u32 raddr; /* IP next hop address */ |
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| 82 | __u32 seq; /* TCP sequence number */ |
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| 83 | __u32 end_seq; /* seq [+ fin] [+ syn] + datalen */ |
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| 84 | __u32 ack_seq; /* TCP ack sequence number */ |
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| 85 | unsigned char proto_priv[16]; /* Protocol private data */ |
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| 86 | #endif |
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| 87 | volatile char acked, /* Are we acked ? */ |
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| 88 | used, /* Are we in use ? */ |
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| 89 | free, /* How to free this buffer */ |
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| 90 | arp; /* Has IP/ARP resolution finished */ |
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| 91 | #if 0 |
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| 92 | unsigned char tries, /* Times tried */ |
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| 93 | lock, /* Are we locked ? */ |
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| 94 | localroute, /* Local routing asserted for this frame */ |
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| 95 | pkt_type, /* Packet class */ |
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| 96 | pkt_bridged, /* Tracker for bridging */ |
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| 97 | #endif |
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| 98 | unsigned char ip_summed; /* Driver fed us an IP checksum */ |
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| 99 | #if 0 |
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| 100 | #define PACKET_HOST 0 /* To us */ |
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| 101 | #define PACKET_BROADCAST 1 /* To all */ |
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| 102 | #define PACKET_MULTICAST 2 /* To group */ |
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| 103 | #define PACKET_OTHERHOST 3 /* To someone else */ |
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| 104 | unsigned short users; /* User count - see datagram.c,tcp.c */ |
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| 105 | #endif |
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| 106 | unsigned short protocol; /* Packet protocol from driver. */ |
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| 107 | unsigned int truesize; /* Buffer size */ |
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| 108 | #if 0 |
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| 109 | |||
| 110 | |||
| 111 | |||
| 112 | atomic_t count; /* reference count */ |
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| 113 | |||
| 114 | |||
| 115 | struct sk_buff *data_skb; /* Link to the actual data skb */ |
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| 116 | #endif |
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| 117 | unsigned char *head; /* Head of buffer */ |
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| 118 | unsigned char *data; /* Data head pointer */ |
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| 119 | unsigned char *tail; /* Tail pointer */ |
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| 120 | #if 0 |
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| 121 | unsigned char *end; /* End pointer */ |
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| 122 | void (*destructor)(struct sk_buff *); /* Destruct function */ |
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| 123 | __u16 redirport; /* Redirect port */ |
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| 124 | #endif |
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| 125 | }; |
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| 126 | |||
| 127 | #define dev_kfree_skb(a) |
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| 128 | #define alloc_skb(a,b) dev_alloc_skb(a) |
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| 129 | /* #define skb_device_unlock(skb); */ |
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| 130 | extern struct sk_buff * dev_alloc_skb(unsigned int size); |
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| 131 | extern unsigned char * skb_put(struct sk_buff *skb, int len); |
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| 132 | extern void skb_queue_head_init(struct sk_buff_head *list); |
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| 133 | extern struct sk_buff * skb_clone(struct sk_buff *skb, int priority); |
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| 134 | extern void skb_reserve(struct sk_buff *skb, int len); |
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| 135 | |||
| 136 | extern __inline__ int skb_headroom(struct sk_buff *skb) |
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| 137 | { |
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| 138 | return skb->data-skb->head; |
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| 139 | } |
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| 140 | |||
| 141 | extern struct sk_buff * skb_realloc_headroom(struct sk_buff *skb, int newheadroom); |
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| 142 | |||
| 143 | extern __inline__ unsigned char *skb_push(struct sk_buff *skb, |
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| 144 | unsigned int len) |
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| 145 | { |
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| 146 | skb->data-=len; |
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| 147 | skb->len+=len; |
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| 148 | if(skb->data<skb->head) |
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| 149 | { |
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| 150 | printk(KERN_ERR "skb_push: PANIC!!!"); |
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| 151 | // __label__ here; |
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| 152 | // skb_under_panic(skb, len, &&here); |
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| 153 | //here: ; |
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| 154 | } |
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| 155 | return skb->data; |
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| 156 | } |
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| 157 | |||
| 158 | extern __inline__ char *skb_pull(struct sk_buff *skb, unsigned int len) |
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| 159 | { |
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| 160 | skb->len-=len; |
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| 161 | return skb->data+=len; |
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| 162 | } |
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| 163 | |||
| 164 | __END_DECLS |
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| 165 | #endif |