src/include/gpxe/ip.h

   1 #ifndef _GPXE_IP_H
   2 #define _GPXE_IP_H
   3
   4 /** @file
   5  *
   6  * IP protocol
   7  *
   8  */
   9
  10 #include <ip.h>
  11 #include <gpxe/retry.h>
  12
  13 /* IP constants */
  14
  15 #define IP_VER                  0x40U
  16 #define IP_MASK_VER             0xf0U
  17 #define IP_MASK_HLEN            0x0fU
  18 #define IP_MASK_OFFSET          0x1fffU
  19 #define IP_MASK_DONOTFRAG       0x4000U
  20 #define IP_MASK_MOREFRAGS       0x2000U
  21 #define IP_PSHLEN       12
  22
  23 /* IP header defaults */
  24 #define IP_TOS          0
  25 #define IP_TTL          64
  26
  27 #define IP_FRAG_IOB_SIZE        1500
  28 #define IP_FRAG_TIMEOUT         50
  29
  30 /* IP4 pseudo header */
  31 struct ipv4_pseudo_header {
  32         struct in_addr src;
  33         struct in_addr dest;
  34         uint8_t zero_padding;
  35         uint8_t protocol;
  36         uint16_t len;
  37 };
  38
  39 /** An IPv4 address/routing table entry */
  40 struct ipv4_miniroute {
  41         /** List of miniroutes */
  42         struct list_head list;
  43
  44         /** Network device */
  45         struct net_device *netdev;
  46
  47         /** IPv4 address */
  48         struct in_addr address;
  49         /** Subnet mask */
  50         struct in_addr netmask;
  51         /** Gateway address */
  52         struct in_addr gateway;
  53 };
  54
  55 /* Fragment reassembly buffer */
  56 struct frag_buffer {
  57         /* Identification number */
  58         uint16_t ident;
  59         /* Source network address */
  60         struct in_addr src;
  61         /* Destination network address */
  62         struct in_addr dest;
  63         /* Reassembled I/O buffer */
  64         struct io_buffer *frag_iob;
  65         /* Reassembly timer */
  66         struct retry_timer frag_timer;
  67         /* List of fragment reassembly buffers */
  68         struct list_head list;
  69 };
  70
  71 struct io_buffer;
  72 struct net_device;
  73 struct net_protocol;
  74 struct tcpip_protocol;
  75
  76 extern struct list_head ipv4_miniroutes;
  77
  78 extern struct net_protocol ipv4_protocol;
  79
  80 extern int add_ipv4_address ( struct net_device *netdev,
  81                               struct in_addr address, struct in_addr netmask,
  82                               struct in_addr gateway );
  83 extern void del_ipv4_address ( struct net_device *netdev );
  84
  85 #endif /* _GPXE_IP_H */