trafgen_proto.h

   1 #ifndef TRAFGEN_PROTO_H
   2 #define TRAFGEN_PROTO_H
   3
   4 #include <stddef.h>
   5 #include <stdint.h>
   6 #include <stdbool.h>
   7
   8 enum proto_id {
   9         PROTO_NONE = 0,
  10         PROTO_ETH,
  11         PROTO_VLAN,
  12         PROTO_ARP,
  13         PROTO_MPLS,
  14         PROTO_IP4,
  15         PROTO_ICMP4,
  16         PROTO_IP6,
  17         PROTO_ICMP6,
  18         PROTO_UDP,
  19         PROTO_TCP,
  20         __PROTO_MAX,
  21 };
  22
  23 enum proto_layer {
  24         PROTO_L0, /* invalid layer */
  25         PROTO_L2,
  26         PROTO_L3,
  27         PROTO_L4,
  28 };
  29
  30 struct proto_hdr;
  31
  32 struct proto_ops {
  33         enum proto_id id;
  34         enum proto_layer layer;
  35
  36         void (*header_init)(struct proto_hdr *hdr);
  37         void (*header_finish)(struct proto_hdr *hdr);
  38         void (*packet_finish)(struct proto_hdr *hdr);
  39         void (*set_next_proto)(struct proto_hdr *hdr, enum proto_id pid);
  40 };
  41
  42 struct proto_hdr {
  43         const struct proto_ops *ops;
  44         uint16_t pkt_offset;
  45         uint32_t pkt_id;
  46         struct proto_field *fields;
  47         size_t fields_count;
  48         size_t len;
  49 };
  50
  51 struct proto_field {
  52         uint32_t id;
  53         size_t len;
  54         uint32_t shift;
  55         uint32_t mask;
  56         /* might be negative (e.g. VLAN TPID field) */
  57         int16_t offset;
  58
  59         bool is_set;
  60         uint16_t pkt_offset;
  61         struct proto_hdr *hdr;
  62 };
  63
  64 extern void protos_init(const char *dev);
  65 extern void proto_ops_register(const struct proto_ops *ops);
  66
  67 extern struct proto_hdr *proto_header_push(enum proto_id pid);
  68 extern void proto_header_finish(struct proto_hdr *hdr);
  69 extern void proto_packet_finish(void);
  70 extern struct proto_hdr *proto_lower_default_add(struct proto_hdr *hdr,
  71                                                  enum proto_id pid);
  72
  73 extern struct proto_hdr *proto_lower_header(struct proto_hdr *hdr);
  74 extern uint8_t *proto_header_ptr(struct proto_hdr *hdr);
  75
  76 extern void proto_header_fields_add(struct proto_hdr *hdr,
  77                                     const struct proto_field *fields,
  78                                     size_t count);
  79
  80 extern bool proto_field_is_set(struct proto_hdr *hdr, uint32_t fid);
  81 extern void proto_field_set_bytes(struct proto_hdr *hdr, uint32_t fid,
  82                                   const uint8_t *bytes);
  83 extern void proto_field_set_u8(struct proto_hdr *hdr, uint32_t fid, uint8_t val);
  84 extern uint8_t proto_field_get_u8(struct proto_hdr *hdr, uint32_t fid);
  85 extern void proto_field_set_u16(struct proto_hdr *hdr, uint32_t fid, uint16_t val);
  86 extern uint16_t proto_field_get_u16(struct proto_hdr *hdr, uint32_t fid);
  87 extern void proto_field_set_u32(struct proto_hdr *hdr, uint32_t fid, uint32_t val);
  88 extern uint32_t proto_field_get_u32(struct proto_hdr *hdr, uint32_t fid);
  89
  90 extern void proto_field_set_default_bytes(struct proto_hdr *hdr, uint32_t fid,
  91                                           const uint8_t *bytes);
  92 extern void proto_field_set_default_u8(struct proto_hdr *hdr, uint32_t fid,
  93                                        uint8_t val);
  94 extern void proto_field_set_default_u16(struct proto_hdr *hdr, uint32_t fid,
  95                                         uint16_t val);
  96 extern void proto_field_set_default_u32(struct proto_hdr *hdr, uint32_t fid,
  97                                         uint32_t val);
  98
  99 extern void proto_field_set_be16(struct proto_hdr *hdr, uint32_t fid, uint16_t val);
 100 extern void proto_field_set_be32(struct proto_hdr *hdr, uint32_t fid, uint32_t val);
 101
 102 extern void proto_field_set_default_be16(struct proto_hdr *hdr, uint32_t fid,
 103                                          uint16_t val);
 104 extern void proto_field_set_default_be32(struct proto_hdr *hdr, uint32_t fid,
 105                                          uint32_t val);
 106
 107 extern void proto_field_set_dev_mac(struct proto_hdr *hdr, uint32_t fid);
 108 extern void proto_field_set_default_dev_mac(struct proto_hdr *hdr, uint32_t fid);
 109
 110 extern void proto_field_set_dev_ipv4(struct proto_hdr *hdr, uint32_t fid);
 111 extern void proto_field_set_default_dev_ipv4(struct proto_hdr *hdr, uint32_t fid);
 112
 113 extern void proto_field_set_dev_ipv6(struct proto_hdr *hdr, uint32_t fid);
 114 extern void proto_field_set_default_dev_ipv6(struct proto_hdr *hdr, uint32_t fid);
 115
 116 #endif /* TRAFGEN_PROTO_H */