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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include "comm.h"
#include "client.h"
#include "server.h"
bool net_recv(int sock, const msg_type_t type)
{
msg_t m;
bool result;
ssize_t len = recv(sock, &m.hdr, sizeof(msg_header_t), MSG_PEEK); // just peek into packet to determine message header
assert(len != -1);
if(m.hdr.type != type)
{
printf("net_recv: received message type %d instead of %d", m.hdr.type, type);
return false;
}
m.payload = malloc(m.hdr.payload_length); // Allocate space for message payload
recv(sock, &m.hdr, sizeof(msg_header_t), 0); // Remove message header from socket
recv(sock, m.payload, m.hdr.payload_length, 0);// And then receive the payload
printf("net_recv: received msg type %d with payload length %d\n", m.hdr.type, m.hdr.payload_length);
switch(type)
{
case msg_type_hello:
result = server_parse_hello(m.payload, m.hdr.payload_length);
break;
case msg_type_start_game:
result = client_parse_player_list(m.payload, m.hdr.payload_length);
break;
case msg_type_deal_hand:
result = client_parse_deal_hand(m.payload, m.hdr.payload_length);
break;
case msg_type_initial_stacks:
printf("not yet implemented: msg_type_initial_stacks\n");
exit(EXIT_FAILURE);
break;
case msg_type_selected_card:
result = server_parse_selected_card(m.payload, m.hdr.payload_length);
break;
case msg_type_selected_stack_c:
result = server_parse_selected_stack(m.payload, m.hdr.payload_length);
break;
case msg_type_selected_stack_s:
result = client_parse_selected_stack(m.payload, m.hdr.payload_length);
break;
default:
printf("net_recv: Unknown message type %d received!\n", type);
exit(EXIT_FAILURE);
break;
}
free(m.payload);
return result;
}
bool net_send(int sock, const msg_type_t type, void *data)
{
bool result = true;
msg_t m;
m.payload = malloc(NET_MSG_MAX_PAYLOAD_LENGTH);
switch(type)
{
case msg_type_hello:
client_prep_hello(&m);
break;
case msg_type_selected_card:
client_prep_selected_card(&m);
break;
case msg_type_selected_stack_c:
client_prep_selected_stack(&m);
break;
case msg_type_start_game:
server_prep_start_game(&m);
break;
case msg_type_selected_stack_s:
server_prep_selected_stack(&m);
break;
case msg_type_deal_hand:
server_prep_deal_hand(&m, data);
break;
case msg_type_initial_stacks:
server_prep_initial_stacks(&m);
break;
default:
printf("net_send: Unknown message type %d given\n", type);
exit(EXIT_FAILURE);
break;
}
printf("net_send: sending msg type %d with payload length %d\n", m.hdr.type, m.hdr.payload_length);
send(sock, &m, sizeof(msg_header_t), 0); // Send message header first
send(sock, m.payload, m.hdr.payload_length, 0); // Then send payload
free(m.payload);
return result;
}
|
