#ifndef _SEPPL_H
#define _SEPPL_H

#define SEPPL_PROTOCOL 177

// Packet layout:
// 1. IP-Header                             PLAIN
// 2. Uncrypted header                      PLAIN
// 3. iv                                    PLAIN
// 4. Crypted header                        CRYPTED
// 5. Payload (with TCP/UDP/...-Header)     CRYPTED
// 6. Padding                               CRYPTED

struct seppl_uncrypt_hdr {
    uint8_t algorithm;
    char key_name[7];
} __attribute__((packed)) uncrypt_hdr;

struct seppl_crypt_hdr{
    uint8_t ident; // 0x00
    uint8_t saved_protocol;
    uint16_t saved_tot_len;
    uint16_t saved_frag_off;
} __attribute__((packed)) crypt_hdr;


#endif