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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
#include "cethcan.h"
#include <event2/buffer.h>
#include "jsonrpc/jsonrpc.h"
static int rpc_ping(void *apparg, json_t *json_params, json_t **result)
{
*result = json_string("pong");
return 0;
}
static int rpc_light_set(void *apparg, json_t *json_params, json_t **result)
{
struct light *l;
struct espnet_device *esp;
struct ttydmx_device *dmx;
const char *name = json_string_value(json_array_get(json_params, 0));
const char *emsg;
l = light_find(name);
if (l) {
unsigned val;
if (!json_is_integer(json_array_get(json_params, 1))) {
emsg = "expected integer value";
goto out_err;
}
val = json_integer_value(json_array_get(json_params, 1));
*result = json_boolean(!light_set(l, val));
return 0;
}
esp = espnet_find(name);
dmx = ttydmx_find(name);
if (esp || dmx) {
unsigned r, g, b;
json_t *val = json_array_get(json_params, 1);
if (json_is_integer(val)) {
r = json_integer_value(val);
g = (r * 180) / 255;
b = (r * 144) / 255;
} else if (json_is_array(val)) {
if (json_unpack(val, "[iii]", &r, &g, &b)) {
emsg = "failed to parse value array";
goto out_err;
}
} else {
emsg = "expected integer or [int,int,int] value";
goto out_err;
}
if (dmx)
*result = json_boolean(!ttydmx_set(dmx, r, g, b));
else if (esp)
*result = json_boolean(!espnet_set(esp, r, g, b));
return 0;
}
emsg = "cann't find specified light";
out_err:
*result = jsonrpc_error_object(JSONRPC_INVALID_PARAMS,
json_string(emsg));
return JSONRPC_INVALID_PARAMS;
}
static int rpc_light_get(void *apparg, json_t *json_params, json_t **result)
{
struct light *l;
struct espnet_device *esp;
struct ttydmx_device *dmx;
const char *name = json_string_value(json_array_get(json_params, 0));
unsigned set, actual;
l = light_find(name);
if (l) {
set = light_getset(l);
actual = light_getact(l);
*result = json_pack("{s:i,s:i}",
"set", set, "actual", actual);
return 0;
}
esp = espnet_find(name);
if (esp) {
unsigned r, g, b;
espnet_get(esp, &r, &g, &b);
*result = json_pack("{s:i,s:i,s:i}",
"r", r, "g", g, "b", b);
return 0;
}
dmx = ttydmx_find(name);
if (dmx) {
unsigned r, g, b;
ttydmx_get(dmx, &r, &g, &b);
*result = json_pack("{s:i,s:i,s:i}",
"r", r, "g", g, "b", b);
return 0;
}
*result = jsonrpc_error_object(JSONRPC_INVALID_PARAMS,
json_string("cannot find specified light"));
return JSONRPC_INVALID_PARAMS;
}
struct jsonrpc_method_entry_t method_table[] = {
{ "ping", rpc_ping, "" },
{ "light_set", rpc_light_set, "[so]" },
{ "light_get", rpc_light_get, "[s]" },
{ NULL, NULL, NULL },
};
void rpc_perform(struct evbuffer *request,
void (*response_handler)(void *arg, struct evbuffer *data),
void *handler_arg)
{
size_t len = evbuffer_get_length(request);
char *data = (char *)evbuffer_pullup(request, len);
struct evbuffer *outbuf = evbuffer_new();
/* TODO: asynchronous calls */
char *output = jsonrpc_handler(NULL, data, len, method_table);
if (output) {
evbuffer_add(outbuf, output, strlen(output));
free(output);
}
response_handler(handler_arg, outbuf);
evbuffer_free(outbuf);
}
|
