Hockey? protocol

structs.c

struct hock_header {
  uint32_t magic;       /* 0x6b636f48 = 'Hock' */
  uint8_t  command;
} __attribute__((packed));

struct hock_01 { /* server status request/response */
  uint8_t  version;
  uint32_t timestamp;
  uint8_t  players;
  uint8_t  gamemode;
  char     name[32];
} __attribute__((packed));

struct hock_02 { /* join server */
  uint8_t  version;
  char     nick[32];
} __attribute__((packed));

struct hock_04 { /* client-to-server update */
  uint32_t my_id;
  float    blade_angle; /* ±1.00 (step 0.2) */
  float    move_x;      /* -1, +1 */
  float    unk1;
  float    move_y;      /* -1, +1 */
  float    stick_x;     /* ±π/2 */
  float    stick_y;     /* ~ -1..+0.4 */
  float    head_x;      /* ±2.75 */
  float    head_y;      /* ±π/2 */
  uint32_t buttons;     /* bitmask:  01: space (jump);  02: ctrl (fall);       04: 1 (join red);  */
                        /*           08: 2 (join blue); 10: shift (slow down); 20: 0 (leave team) */
  uint32_t time_played; /* unit: ?? */
} __attribute__((packed));

struct hock_05 { /* server-to-client update */
  uint32_t my_id;
  uint32_t unk2;
  uint8_t  blue_score; /* ×2 */
  uint8_t  red_score;  /* ×2 */
  uint32_t time_left;  /* unit: 200s of a second */
  uint16_t period;     /* ×2 */
  uint8_t  unk6;
  uint32_t msgid;
  uint32_t parid;
} __attribute__((packed));

struct hock_06 {
  uint32_t my_id;
} __attribute__((packed));