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1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include <assert.h>
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23 #include <stdio.h>
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24
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25 #include "uv.h"
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26 #include "internal.h"
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27 #include "req-inl.h"
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28
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29 #ifndef GetNameInfo
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30 int WSAAPI GetNameInfoW(
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31 const SOCKADDR *pSockaddr,
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32 socklen_t SockaddrLength,
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33 PWCHAR pNodeBuffer,
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34 DWORD NodeBufferSize,
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35 PWCHAR pServiceBuffer,
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36 DWORD ServiceBufferSize,
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37 INT Flags
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38 );
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39 #endif
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40
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41 static void uv__getnameinfo_work(struct uv__work* w) {
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42 uv_getnameinfo_t* req;
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43 WCHAR host[NI_MAXHOST];
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44 WCHAR service[NI_MAXSERV];
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45 size_t size;
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46 int ret;
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47
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48 req = container_of(w, uv_getnameinfo_t, work_req);
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49 if (GetNameInfoW((struct sockaddr*)&req->storage,
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50 sizeof(req->storage),
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51 host,
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52 ARRAY_SIZE(host),
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53 service,
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54 ARRAY_SIZE(service),
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55 req->flags)) {
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56 ret = WSAGetLastError();
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57 req->retcode = uv__getaddrinfo_translate_error(ret);
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58 return;
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59 }
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60
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61 size = sizeof(req->host);
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62 ret = uv__copy_utf16_to_utf8(host, -1, req->host, &size);
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63 if (ret < 0) {
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64 req->retcode = ret;
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65 return;
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66 }
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67
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68 size = sizeof(req->service);
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69 ret = uv__copy_utf16_to_utf8(service, -1, req->service, &size);
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70 if (ret < 0) {
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71 req->retcode = ret;
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72 }
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73 }
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74
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75
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76 /*
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77 * Called from uv_run when complete.
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78 */
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79 static void uv__getnameinfo_done(struct uv__work* w, int status) {
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80 uv_getnameinfo_t* req;
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81 char* host;
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82 char* service;
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83
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84 req = container_of(w, uv_getnameinfo_t, work_req);
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85 uv__req_unregister(req->loop);
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86 host = service = NULL;
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87
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88 if (status == UV_ECANCELED) {
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89 assert(req->retcode == 0);
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90 req->retcode = UV_EAI_CANCELED;
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91 } else if (req->retcode == 0) {
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92 host = req->host;
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93 service = req->service;
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94 }
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95
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96 if (req->getnameinfo_cb)
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97 req->getnameinfo_cb(req, req->retcode, host, service);
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98 }
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99
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100
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101 /*
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102 * Entry point for getnameinfo
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103 * return 0 if a callback will be made
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104 * return error code if validation fails
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105 */
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106 int uv_getnameinfo(uv_loop_t* loop,
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107 uv_getnameinfo_t* req,
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108 uv_getnameinfo_cb getnameinfo_cb,
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109 const struct sockaddr* addr,
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110 int flags) {
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111 if (req == NULL || addr == NULL)
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112 return UV_EINVAL;
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113
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114 if (addr->sa_family == AF_INET) {
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115 memcpy(&req->storage,
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116 addr,
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117 sizeof(struct sockaddr_in));
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118 } else if (addr->sa_family == AF_INET6) {
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119 memcpy(&req->storage,
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120 addr,
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121 sizeof(struct sockaddr_in6));
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122 } else {
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123 return UV_EINVAL;
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124 }
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125
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126 UV_REQ_INIT(req, UV_GETNAMEINFO);
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127 uv__req_register(loop);
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128
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129 req->getnameinfo_cb = getnameinfo_cb;
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130 req->flags = flags;
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131 req->loop = loop;
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132 req->retcode = 0;
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133
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134 if (getnameinfo_cb) {
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135 uv__work_submit(loop,
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136 &req->work_req,
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137 UV__WORK_SLOW_IO,
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138 uv__getnameinfo_work,
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139 uv__getnameinfo_done);
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140 return 0;
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141 } else {
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142 uv__getnameinfo_work(&req->work_req);
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143 uv__getnameinfo_done(&req->work_req, 0);
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144 return req->retcode;
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145 }
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146 }
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