src/include/gpxe/ip6.h

   1 #ifndef _GPXE_IP6_H
   2 #define _GPXE_IP6_H
   3
   4 /** @file
   5  *
   6  * IP6 protocol
   7  *
   8  */
   9
  10 FILE_LICENCE ( GPL2_OR_LATER );
  11
  12 #include <stdint.h>
  13 #include <gpxe/in.h>
  14 #include <gpxe/tcpip.h>
  15 #include <gpxe/retry.h>
  16
  17 /* IP6 constants */
  18
  19 #define IP6_VERSION     0x6
  20 #define IP6_HOP_LIMIT   255
  21
  22 #define IP6_FRAG_IOB_SIZE       2000
  23 #define IP6_FRAG_TIMEOUT        50
  24
  25 #define IP6_MORE_FRAGMENTS      0x01
  26
  27 /**
  28  * I/O buffer contents
  29  * This is duplicated in tcp.h and here. Ideally it should go into iobuf.h
  30  */
  31 #define MAX_HDR_LEN     100
  32 #define MAX_IOB_LEN     1500
  33 #define MIN_IOB_LEN     MAX_HDR_LEN + 100 /* To account for padding by LL */
  34
  35 #define IP6_EQUAL( in6_addr1, in6_addr2 ) \
  36         ( memcmp ( ( char* ) &( in6_addr1 ), ( char* ) &( in6_addr2 ),\
  37         sizeof ( struct in6_addr ) ) == 0 )
  38
  39 #define IS_UNSPECIFIED( addr ) \
  40         ( ( (addr).in6_u.u6_addr32[0] == 0x00000000 ) && \
  41         ( (addr).in6_u.u6_addr32[1] == 0x00000000 ) && \
  42         ( (addr).in6_u.u6_addr32[2] == 0x00000000 ) && \
  43         ( (addr).in6_u.u6_addr32[3] == 0x00000000 ) )
  44
  45 /* IP6 header */
  46 struct ip6_header {
  47         uint32_t        ver_traffic_class_flow_label;
  48         uint16_t        payload_len;
  49         uint8_t         nxt_hdr;
  50         uint8_t         hop_limit;
  51         struct in6_addr src;
  52         struct in6_addr dest;
  53 };
  54
  55 /* IP6 pseudo header */
  56 struct ipv6_pseudo_header {
  57         struct in6_addr src;
  58         struct in6_addr dest;
  59         uint8_t zero_padding;
  60         uint8_t nxt_hdr;
  61         uint16_t len;
  62 };
  63
  64 /* IP6 option header */
  65 struct ip6_opt_hdr {
  66         uint8_t type;
  67         uint8_t len;
  68 };
  69
  70 /* IP6 fragment header */
  71 struct ip6_frag_hdr {
  72         uint8_t next_hdr;
  73         uint8_t rsvd;
  74         uint16_t offset_flags;
  75         uint32_t ident;
  76 };
  77
  78 /* Fragment reassembly buffer */
  79 struct frag_buffer {
  80         /* "Next Header" for the packet. */
  81         uint8_t next_hdr;
  82         /* Identification number */
  83         uint32_t ident;
  84         /* Source network address */
  85         struct in6_addr src;
  86         /* Destination network address */
  87         struct in6_addr dest;
  88         /* Reassembled I/O buffer */
  89         struct io_buffer *frag_iob;
  90         /* Reassembly timer */
  91         struct retry_timer frag_timer;
  92         /* List of fragment reassembly buffers */
  93         struct list_head list;
  94 };
  95
  96 /* Next header numbers */
  97 #define IP6_HOPBYHOP_FIRST      0x00
  98 #define IP6_HOPBYHOP            0xFE
  99 #define IP6_PAD                 0x00
 100 #define IP6_PADN                0x01
 101 #define IP6_ICMP6               0x3A
 102 #define IP6_ROUTING             0x2B
 103 #define IP6_FRAGMENT            0x2C
 104 #define IP6_AUTHENTICATION      0x33
 105 #define IP6_DEST_OPTS           0x3C
 106 #define IP6_ESP                 0x32
 107 #define IP6_NO_HEADER           0x3B
 108
 109 struct io_buffer;
 110 struct net_device;
 111 struct net_protocol;
 112
 113 extern struct net_protocol ipv6_protocol;
 114 extern struct tcpip_net_protocol ipv6_tcpip_protocol;
 115 extern char * inet6_ntoa ( struct in6_addr in6 );
 116 extern int inet6_aton ( const char *cp, struct in6_addr *inp );
 117
 118 void ipv6_generate_eui64 ( uint8_t *out, uint8_t *ll );
 119
 120 int ipv6_match_prefix ( struct in6_addr *p1, struct in6_addr *p2, size_t len );
 121
 122 extern int add_ipv6_address ( struct net_device *netdev,
 123                               struct in6_addr prefix, int prefix_len,
 124                               struct in6_addr address,
 125                               struct in6_addr gateway );
 126 extern void del_ipv6_address ( struct net_device *netdev );
 127
 128 extern int ipv6_tx ( struct io_buffer *iobuf,
 129                      struct tcpip_protocol *tcpip,
 130                      struct sockaddr_tcpip *st_src,
 131                      struct sockaddr_tcpip *st_dest,
 132                      struct net_device *netdev,
 133                      uint16_t *trans_csum );
 134
 135 #endif /* _GPXE_IP6_H */