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#pragma once
#include <stdlib.h>
#include <stdint.h>
#define PROTM_MAX_SIZE 65536
#define PROTM_TYPE_ESTAB 1
#define PROTM_TYPE_TERM 2
#define PROTM_TYPE_DATA 3
#define PROTM_TYPE_RR 4
#define PROTM_TYPE_RR_POLL 5
struct __attribute__((packed)) protm {
uint8_t type;
union {
struct {
uint8_t ack;
} estab;
struct {
uint8_t ack;
} term;
struct {
uint8_t seqnum, rr;
uint32_t size;
// An IPv4 packet is at most 65536 bytes, so the data portion
// left after allowing for the IPv4 and ICMP headers as well
// as those for this protocol, is surely at most 65536 bytes.
uint8_t data[65536];
} data;
struct {
uint8_t rr, nrej;
uint8_t rej[256];
} rr;
struct {
// empty
} rr_poll;
};
};
size_t protm_size(const struct protm *pm);
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