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#ifndef TRAFGEN_PROTO_H
#define TRAFGEN_PROTO_H
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
struct proto_ctx {
const char *dev;
};
enum proto_id {
PROTO_NONE,
PROTO_ETH,
PROTO_VLAN,
PROTO_ARP,
PROTO_MPLS,
PROTO_IP4,
PROTO_IP6,
PROTO_UDP,
PROTO_TCP,
};
enum proto_layer {
PROTO_L0, /* invalid layer */
PROTO_L2,
PROTO_L3,
PROTO_L4,
};
struct proto_field {
uint32_t id;
size_t len;
uint32_t shift;
uint32_t mask;
/* might be negative (e.g. VLAN TPID field) */
int16_t offset;
bool is_set;
uint16_t pkt_offset;
};
struct proto_hdr {
enum proto_id id;
enum proto_layer layer;
struct proto_hdr *next;
struct proto_ctx *ctx;
uint16_t pkt_offset;
struct proto_field *fields;
size_t fields_count;
void (*header_init)(struct proto_hdr *hdr);
void (*header_finish)(struct proto_hdr *hdr);
void (*packet_finish)(struct proto_hdr *hdr);
void (*set_next_proto)(struct proto_hdr *hdr, enum proto_id pid);
};
extern void protos_init(const char *dev);
extern void proto_header_register(struct proto_hdr *hdr);
extern struct proto_hdr *proto_header_init(enum proto_id pid);
extern void proto_header_finish(struct proto_hdr *hdr);
extern void proto_packet_finish(void);
extern struct proto_hdr *proto_lower_default_add(struct proto_hdr *hdr,
enum proto_id pid);
extern struct proto_hdr *proto_lower_header(struct proto_hdr *hdr);
extern uint8_t *proto_header_ptr(struct proto_hdr *hdr);
extern void proto_header_fields_add(struct proto_hdr *hdr,
const struct proto_field *fields,
size_t count);
extern bool proto_field_is_set(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_bytes(struct proto_hdr *hdr, uint32_t fid,
uint8_t *bytes);
extern void proto_field_set_u8(struct proto_hdr *hdr, uint32_t fid, uint8_t val);
extern uint8_t proto_field_get_u8(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_u16(struct proto_hdr *hdr, uint32_t fid, uint16_t val);
extern uint16_t proto_field_get_u16(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_u32(struct proto_hdr *hdr, uint32_t fid, uint32_t val);
extern uint32_t proto_field_get_u32(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_default_bytes(struct proto_hdr *hdr, uint32_t fid,
uint8_t *bytes);
extern void proto_field_set_default_u8(struct proto_hdr *hdr, uint32_t fid,
uint8_t val);
extern void proto_field_set_default_u16(struct proto_hdr *hdr, uint32_t fid,
uint16_t val);
extern void proto_field_set_default_u32(struct proto_hdr *hdr, uint32_t fid,
uint32_t val);
extern void proto_field_set_be16(struct proto_hdr *hdr, uint32_t fid, uint16_t val);
extern void proto_field_set_be32(struct proto_hdr *hdr, uint32_t fid, uint32_t val);
extern void proto_field_set_default_be16(struct proto_hdr *hdr, uint32_t fid,
uint16_t val);
extern void proto_field_set_default_be32(struct proto_hdr *hdr, uint32_t fid,
uint32_t val);
extern void proto_field_set_dev_mac(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_default_dev_mac(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_dev_ipv4(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_default_dev_ipv4(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_dev_ipv6(struct proto_hdr *hdr, uint32_t fid);
extern void proto_field_set_default_dev_ipv6(struct proto_hdr *hdr, uint32_t fid);
#endif /* TRAFGEN_PROTO_H */
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