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
54
55
56
57
|
#include <arpa/inet.h>
#include "jail_packet.h"
#include "utils.h"
typedef struct jail_packet {
uint8_t type;
uint16_t size;
} jail_packet;
typedef ssize_t (*packet_callback)(jail_packet_ctx *ctx, unsigned char *data,
size_t siz);
typedef struct jail_packet_callback {
uint8_t type;
packet_callback pc;
} jail_packet_callback;
static ssize_t pkt_header_read(unsigned char *buf, size_t siz);
static ssize_t pkt_hello(jail_packet_ctx *ctx, unsigned char *data, size_t siz);
#define PKT_CB(type, cb) \
{ type, cb }
static const jail_packet_callback jpc[] = {
PKT_CB(PKT_INVALID, NULL),
PKT_CB(PKT_HELLO, pkt_hello)
};
static ssize_t pkt_header_read(unsigned char *buf, size_t siz)
{
jail_packet *pkt;
if (siz < sizeof(*pkt))
return -1;
pkt = (jail_packet *) buf;
if (pkt->type >= SIZEOF(jpc))
return -1;
pkt->size = ntohs(pkt->size);
if (siz < pkt->size)
return -1;
return pkt->size;
}
static ssize_t pkt_hello(jail_packet_ctx *ctx, unsigned char *data, size_t siz)
{
return -1;
}
int jail_packet_loop(event_ctx *ctx, jail_packet_ctx *pkt_ctx,
on_data_cb on_data)
{
return 1;
}
|