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/*
* Copyright (C) Max Romanov
* Copyright (C) NGINX, Inc.
*/
package unit
/*
#include "nxt_go_lib.h"
#include "nxt_process_type.h"
*/
import "C"
import (
"fmt"
"net"
"net/http"
"os"
"sync"
"unsafe"
)
type port_key struct {
pid int
id int
}
type port struct {
key port_key
t int
rcv *net.UnixConn
snd *net.UnixConn
}
type port_registry struct {
sync.RWMutex
m map[port_key]*port
t [C.NXT_PROCESS_MAX]*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 remove_by_pid(pid int) {
port_registry_.Lock()
if port_registry_.m != nil {
for k, p := range port_registry_.m {
if k.pid == pid {
if port_registry_.t[p.t] == p {
port_registry_.t[p.t] = nil
}
delete(port_registry_.m, k)
}
}
}
port_registry_.Unlock()
}
func main_port() *port {
port_registry_.RLock()
res := port_registry_.t[C.NXT_PROCESS_MAIN]
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)
}
port_registry_.m[p.key] = p
port_registry_.t[p.t] = 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 {
fmt.Printf("FileConn error %s\n", err)
return nil
}
uc, ok := c.(*net.UnixConn)
if !ok {
fmt.Printf("Not a Unix-domain socket %d\n", fd)
return nil
}
return uc
}
//export nxt_go_new_port
func nxt_go_new_port(pid C.int, id C.int, t C.int, rcv C.int, snd C.int) {
new_port(int(pid), int(id), int(t), int(rcv), int(snd))
}
//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.int {
key := port_key{
pid: int(pid),
id: int(id),
}
p := find_port(key)
if p == nil {
return 0
}
n, oobn, err := p.snd.WriteMsgUnix(C.GoBytes(buf, buf_size),
C.GoBytes(oob, oob_size), nil)
if err != nil {
fmt.Printf("write result %d (%d), %s\n", n, oobn, err)
}
return C.int(n)
}
//export nxt_go_main_send
func nxt_go_main_send(buf unsafe.Pointer, buf_size C.int, oob unsafe.Pointer,
oob_size C.int) C.int {
p := main_port()
if p == nil {
return 0
}
n, oobn, err := p.snd.WriteMsgUnix(C.GoBytes(buf, buf_size),
C.GoBytes(oob, oob_size), nil)
if err != nil {
fmt.Printf("write result %d (%d), %s\n", n, oobn, err)
}
return C.int(n)
}
func new_port(pid int, id int, t int, rcv int, snd int) *port {
p := &port{
key: port_key{
pid: pid,
id: id,
},
t: t,
rcv: getUnixConn(rcv),
snd: getUnixConn(snd),
}
add_port(p)
return p
}
func (p *port) read(handler http.Handler) error {
var buf [16384]byte
var oob [1024]byte
n, oobn, _, _, err := p.rcv.ReadMsgUnix(buf[:], oob[:])
if err != nil {
return err
}
m := new_cmsg(buf[:n], oob[:oobn])
c_req := C.nxt_go_process_port_msg(m.buf.b, m.buf.s, m.oob.b, m.oob.s)
if c_req == 0 {
m.Close()
return nil
}
r := find_request(c_req)
if len(r.msgs) == 0 {
r.push(m)
} else if r.ch != nil {
r.ch <- m
} else {
m.Close()
}
go func(r *request) {
if handler == nil {
handler = http.DefaultServeMux
}
handler.ServeHTTP(r.response(), &r.req)
r.done()
}(r)
return nil
}
|
