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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <json_object.h>
#include "vali.h"
#include "conn.h"
struct vali_client_call {
struct vali_client *client;
};
struct vali_client {
struct vali_conn conn;
struct vali_client_call *pending_call;
};
struct vali_client *vali_client_connect_fd(int fd) {
struct vali_client *client = calloc(1, sizeof(*client));
if (client == NULL) {
return NULL;
}
conn_init(&client->conn, fd);
return client;
}
struct vali_client *vali_client_connect_unix(const char *path) {
struct sockaddr_un addr;
if (!set_sockaddr_un(&addr, path)) {
errno = -EINVAL;
return false;
}
int fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
return NULL;
}
if (!set_cloexec(fd)) {
goto err_fd;
}
if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
goto err_fd;
}
struct vali_client *client = vali_client_connect_fd(fd);
if (client == NULL) {
goto err_fd;
}
return client;
err_fd:
close(fd);
return NULL;
}
void vali_client_destroy(struct vali_client *client) {
conn_finish(&client->conn);
free(client);
}
static bool client_send(struct vali_client *client, struct json_object *req) {
return conn_enqueue(&client->conn, req) && conn_flush(&client->conn);
}
static bool client_receive(struct vali_client *client,
struct json_object **out, struct vali_error *err, bool *continues) {
if (out != NULL) {
*out = NULL;
}
if (err != NULL) {
*err = (struct vali_error){0};
}
bool eof = false;
struct json_object *resp = NULL;
if (!conn_receive(&client->conn, &eof) || !conn_dequeue(&client->conn, &resp) || resp == NULL) {
return false;
}
struct json_object *params = json_object_object_get(resp, "parameters");
const char *error_name = json_object_get_string(json_object_object_get(resp, "error"));
*continues = json_object_get_boolean(json_object_object_get(resp, "continues"));
bool ok = error_name == NULL;
if (out != NULL && ok) {
*out = json_object_get(params);
}
if (err != NULL && !ok) {
vali_error_set(err, error_name, params);
}
json_object_put(resp);
return ok;
}
bool vali_client_call(struct vali_client *client,
const char *method, struct json_object *in, struct json_object **out,
struct vali_error *err) {
assert(in == NULL || json_object_get_type(in) == json_type_object);
struct json_object *req = json_object_new_object();
struct json_object *method_obj = json_object_new_string(method);
if (req == NULL || method_obj == NULL) {
return false;
}
json_object_object_add(req, "method", method_obj);
json_object_object_add(req, "parameters", in);
bool continues = false;
return client_send(client, req) && client_receive(client, out, err, &continues) && !continues;
}
struct vali_client_call *vali_client_call_more(struct vali_client *client,
const char *method, struct json_object *in) {
assert(in == NULL || json_object_get_type(in) == json_type_object);
struct json_object *req = json_object_new_object();
struct json_object *method_obj = json_object_new_string(method);
struct json_object *more_obj = json_object_new_boolean(true);
if (req == NULL || method_obj == NULL || more_obj == NULL) {
return NULL;
}
json_object_object_add(req, "method", method_obj);
json_object_object_add(req, "parameters", in);
json_object_object_add(req, "more", more_obj);
if (!client_send(client, req)) {
return NULL;
}
struct vali_client_call *call = calloc(1, sizeof(*call));
if (call == NULL) {
return NULL;
}
call->client = client;
assert(client->pending_call == NULL);
client->pending_call = call;
return call;
}
bool vali_client_call_oneway(struct vali_client *client,
const char *method, struct json_object *in) {
assert(in == NULL || json_object_get_type(in) == json_type_object);
struct json_object *req = json_object_new_object();
struct json_object *method_obj = json_object_new_string(method);
struct json_object *oneway_obj = json_object_new_boolean(true);
if (req == NULL || method_obj == NULL || oneway_obj == NULL) {
return false;
}
json_object_object_add(req, "method", method_obj);
json_object_object_add(req, "parameters", in);
json_object_object_add(req, "oneway", oneway_obj);
return client_send(client, req);
}
void vali_error_finish(struct vali_error *err) {
free(err->name);
json_object_put(err->parameters);
}
void vali_error_set(struct vali_error *err, const char *name,
struct json_object *parameters) {
vali_error_finish(err);
*err = (struct vali_error){
.name = strdup(name),
.parameters = json_object_get(parameters),
};
}
bool vali_client_call_wait(struct vali_client_call *call,
struct json_object **out, struct vali_error *err) {
assert(!vali_client_call_is_done(call));
bool continues = false;
if (!client_receive(call->client, out, err, &continues)) {
return false;
}
if (!continues) {
call->client->pending_call = NULL;
}
return true;
}
void vali_client_call_destroy(struct vali_client_call *call) {
assert(vali_client_call_is_done(call));
free(call);
}
bool vali_client_call_is_done(struct vali_client_call *call) {
return call->client->pending_call != call;
}
|
