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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 <stdlib.h>
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24 #include <stdio.h>
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25 #include <string.h>
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26
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27 #include "uv.h"
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28 #include "internal.h"
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29
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30
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31 static void uv__getnameinfo_work(struct uv__work* w) {
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32 uv_getnameinfo_t* req;
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33 int err;
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34 socklen_t salen;
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35
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36 req = container_of(w, uv_getnameinfo_t, work_req);
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37
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38 if (req->storage.ss_family == AF_INET)
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39 salen = sizeof(struct sockaddr_in);
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40 else if (req->storage.ss_family == AF_INET6)
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41 salen = sizeof(struct sockaddr_in6);
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42 else
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43 abort();
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44
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45 err = getnameinfo((struct sockaddr*) &req->storage,
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46 salen,
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47 req->host,
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48 sizeof(req->host),
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49 req->service,
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50 sizeof(req->service),
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51 req->flags);
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52 req->retcode = uv__getaddrinfo_translate_error(err);
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53 }
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54
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55 static void uv__getnameinfo_done(struct uv__work* w, int status) {
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56 uv_getnameinfo_t* req;
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57 char* host;
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58 char* service;
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59
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60 req = container_of(w, uv_getnameinfo_t, work_req);
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61 uv__req_unregister(req->loop);
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62 host = service = NULL;
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63
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64 if (status == UV_ECANCELED) {
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65 assert(req->retcode == 0);
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66 req->retcode = UV_EAI_CANCELED;
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67 } else if (req->retcode == 0) {
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68 host = req->host;
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69 service = req->service;
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70 }
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71
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72 if (req->getnameinfo_cb)
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73 req->getnameinfo_cb(req, req->retcode, host, service);
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74 }
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75
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76 /*
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77 * Entry point for getnameinfo
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78 * return 0 if a callback will be made
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79 * return error code if validation fails
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80 */
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81 int uv_getnameinfo(uv_loop_t* loop,
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82 uv_getnameinfo_t* req,
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83 uv_getnameinfo_cb getnameinfo_cb,
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84 const struct sockaddr* addr,
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85 int flags) {
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86 if (req == NULL || addr == NULL)
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87 return UV_EINVAL;
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88
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89 if (addr->sa_family == AF_INET) {
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90 memcpy(&req->storage,
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91 addr,
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92 sizeof(struct sockaddr_in));
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93 } else if (addr->sa_family == AF_INET6) {
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94 memcpy(&req->storage,
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95 addr,
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96 sizeof(struct sockaddr_in6));
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97 } else {
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98 return UV_EINVAL;
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99 }
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100
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101 uv__req_init(loop, (uv_req_t*)req, UV_GETNAMEINFO);
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102
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103 req->getnameinfo_cb = getnameinfo_cb;
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104 req->flags = flags;
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105 req->type = UV_GETNAMEINFO;
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106 req->loop = loop;
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107 req->retcode = 0;
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108
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109 if (getnameinfo_cb) {
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110 uv__work_submit(loop,
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111 &req->work_req,
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112 UV__WORK_SLOW_IO,
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113 uv__getnameinfo_work,
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114 uv__getnameinfo_done);
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115 return 0;
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116 } else {
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117 uv__getnameinfo_work(&req->work_req);
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118 uv__getnameinfo_done(&req->work_req, 0);
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119 return req->retcode;
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120 }
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121 }
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