protocol.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

#include <stdint.h>  // Provides uint8_t, int8_t, etc.

// client to server messages (commands)

struct Hello {
    uint8_t commandType; // 0
    uint16_t udpPort;
} __attribute__((packed));
struct SetStation {
    uint8_t commandType; // 1
    uint16_t stationNumber;
} __attribute__((packed));

struct ListStations {
    uint8_t commandType; // 5
} __attribute__((packed));

// server to client message (replies)
struct Welcome {
    uint8_t replyType; // 2
    uint16_t numStations;
} __attribute__((packed));

struct Announce {
    uint8_t replyType; // 3
    uint8_t songnameSize;
    char *songname;
} __attribute__((packed));

struct InvalidCommand {
    uint8_t replyType; // 4
    uint8_t replyStringSize;
    char *replyString;
} __attribute__((packed));

struct StationInfo {
    uint8_t replyType; // 6
    uint32_t infoStringSize;
    char *infoString;
} __attribute__((packed));

struct StationShutdown {
    uint8_t replyType; // 7
} __attribute__((packed));

struct NewStation {
    uint8_t replyType; // 8
    uint16_t stationNumber;
} __attribute__((packed));


int send_all(int sock, char *buf, int *len);
int recv_all(int sock, char *buf, int *len);