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
|
/*
* Copyright (C) Max Romanov
* Copyright (C) NGINX, Inc.
*/
package unit
/*
#include "nxt_cgo_lib.h"
*/
import "C"
import (
"io"
"net"
"os"
"sync"
"unsafe"
)
type port_key struct {
pid int
id int
}
type port struct {
key port_key
rcv *net.UnixConn
snd *net.UnixConn
}
type port_registry struct {
sync.RWMutex
m map[port_key]*port
}
var port_registry_ port_registry
func find_port(key port_key) *port {
port_registry_.RLock()
res := port_registry_.m[key]
port_registry_.RUnlock()
return res
}
func add_port(p *port) {
port_registry_.Lock()
if port_registry_.m == nil {
port_registry_.m = make(map[port_key]*port)
}
old := port_registry_.m[p.key]
if old == nil {
port_registry_.m[p.key] = p
}
port_registry_.Unlock()
}
func (p *port) Close() {
if p.rcv != nil {
p.rcv.Close()
}
if p.snd != nil {
p.snd.Close()
}
}
func getUnixConn(fd int) *net.UnixConn {
if fd < 0 {
return nil
}
f := os.NewFile(uintptr(fd), "sock")
defer f.Close()
c, err := net.FileConn(f)
if err != nil {
nxt_go_alert("FileConn error %s", err)
return nil
}
uc, ok := c.(*net.UnixConn)
if !ok {
nxt_go_alert("Not a Unix-domain socket %d", fd)
return nil
}
return uc
}
//export nxt_go_add_port
func nxt_go_add_port(ctx *C.nxt_unit_ctx_t, p *C.nxt_unit_port_t) C.int {
new_port := &port{
key: port_key{
pid: int(p.id.pid),
id: int(p.id.id),
},
rcv: getUnixConn(int(p.in_fd)),
snd: getUnixConn(int(p.out_fd)),
}
add_port(new_port)
p.in_fd = -1
p.out_fd = -1
if new_port.key.id == 65535 {
go func(ctx *C.nxt_unit_ctx_t) {
C.nxt_unit_run_shared(ctx);
}(ctx)
}
return C.NXT_UNIT_OK
}
//export nxt_go_remove_port
func nxt_go_remove_port(unit *C.nxt_unit_t, ctx *C.nxt_unit_ctx_t,
p *C.nxt_unit_port_t) {
key := port_key{
pid: int(p.id.pid),
id: int(p.id.id),
}
port_registry_.Lock()
if port_registry_.m != nil {
delete(port_registry_.m, key)
}
port_registry_.Unlock()
}
//export nxt_go_port_send
func nxt_go_port_send(pid C.int, id C.int, buf unsafe.Pointer, buf_size C.int,
oob unsafe.Pointer, oob_size C.int) C.ssize_t {
key := port_key{
pid: int(pid),
id: int(id),
}
p := find_port(key)
if p == nil {
nxt_go_alert("port %d:%d not found", pid, id)
return 0
}
n, oobn, err := p.snd.WriteMsgUnix(GoBytes(buf, buf_size),
GoBytes(oob, oob_size), nil)
if err != nil {
nxt_go_warn("write result %d (%d), %s", n, oobn, err)
n = -1
}
return C.ssize_t(n)
}
//export nxt_go_port_recv
func nxt_go_port_recv(pid C.int, id C.int, buf unsafe.Pointer, buf_size C.int,
oob unsafe.Pointer, oob_size C.int) C.ssize_t {
key := port_key{
pid: int(pid),
id: int(id),
}
p := find_port(key)
if p == nil {
nxt_go_alert("port %d:%d not found", pid, id)
return 0
}
n, oobn, _, _, err := p.rcv.ReadMsgUnix(GoBytes(buf, buf_size),
GoBytes(oob, oob_size))
if err != nil {
if nerr, ok := err.(*net.OpError); ok {
if nerr.Err == io.EOF {
return 0
}
}
nxt_go_warn("read result %d (%d), %s", n, oobn, err)
n = -1
}
return C.ssize_t(n)
}
|
