1/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2*
3* Permission is hereby granted, free of charge, to any person obtaining a copy
4* of this software and associated documentation files (the "Software"), to
5* deal in the Software without restriction, including without limitation the
6* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7* sell copies of the Software, and to permit persons to whom the Software is
8* furnished to do so, subject to the following conditions:
9*
10* The above copyright notice and this permission notice shall be included in
11* all copies or substantial portions of the Software.
12*
13* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19* IN THE SOFTWARE.
20*/
21
22#include <assert.h>
23#include <stdlib.h>
24#include <stdio.h>
25#include <string.h>
26
27#include "uv.h"
28#include "internal.h"
29
30
31static void uv__getnameinfo_work(struct uv__work* w) {
32 uv_getnameinfo_t* req;
33 int err;
34 socklen_t salen;
35
36 req = container_of(w, uv_getnameinfo_t, work_req);
37
38 if (req->storage.ss_family == AF_INET)
39 salen = sizeof(struct sockaddr_in);
40 else if (req->storage.ss_family == AF_INET6)
41 salen = sizeof(struct sockaddr_in6);
42 else
43 abort();
44
45 err = getnameinfo((struct sockaddr*) &req->storage,
46 salen,
47 req->host,
48 sizeof(req->host),
49 req->service,
50 sizeof(req->service),
51 req->flags);
52 req->retcode = uv__getaddrinfo_translate_error(err);
53}
54
55static void uv__getnameinfo_done(struct uv__work* w, int status) {
56 uv_getnameinfo_t* req;
57 char* host;
58 char* service;
59
60 req = container_of(w, uv_getnameinfo_t, work_req);
61 uv__req_unregister(req->loop, req);
62 host = service = NULL;
63
64 if (status == UV_ECANCELED) {
65 assert(req->retcode == 0);
66 req->retcode = UV_EAI_CANCELED;
67 } else if (req->retcode == 0) {
68 host = req->host;
69 service = req->service;
70 }
71
72 if (req->getnameinfo_cb)
73 req->getnameinfo_cb(req, req->retcode, host, service);
74}
75
76/*
77* Entry point for getnameinfo
78* return 0 if a callback will be made
79* return error code if validation fails
80*/
81int uv_getnameinfo(uv_loop_t* loop,
82 uv_getnameinfo_t* req,
83 uv_getnameinfo_cb getnameinfo_cb,
84 const struct sockaddr* addr,
85 int flags) {
86 if (req == NULL || addr == NULL)
87 return UV_EINVAL;
88
89 if (addr->sa_family == AF_INET) {
90 memcpy(&req->storage,
91 addr,
92 sizeof(struct sockaddr_in));
93 } else if (addr->sa_family == AF_INET6) {
94 memcpy(&req->storage,
95 addr,
96 sizeof(struct sockaddr_in6));
97 } else {
98 return UV_EINVAL;
99 }
100
101 uv__req_init(loop, (uv_req_t*)req, UV_GETNAMEINFO);
102
103 req->getnameinfo_cb = getnameinfo_cb;
104 req->flags = flags;
105 req->type = UV_GETNAMEINFO;
106 req->loop = loop;
107 req->retcode = 0;
108
109 if (getnameinfo_cb) {
110 uv__work_submit(loop,
111 &req->work_req,
112 UV__WORK_SLOW_IO,
113 uv__getnameinfo_work,
114 uv__getnameinfo_done);
115 return 0;
116 } else {
117 uv__getnameinfo_work(&req->work_req);
118 uv__getnameinfo_done(&req->work_req, 0);
119 return req->retcode;
120 }
121}
122