trafgen_proto.h

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