1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 * Permission is hereby granted, free of charge, to any person obtaining a copy
3 * of this software and associated documentation files (the "Software"), to
4 * deal in the Software without restriction, including without limitation the
5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
6 * sell copies of the Software, and to permit persons to whom the Software is
7 * furnished to do so, subject to the following conditions:
8 *
9 * The above copyright notice and this permission notice shall be included in
10 * all copies or substantial portions of the Software.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
18 * IN THE SOFTWARE.
19 */
20
21 /* Expose glibc-specific EAI_* error codes. Needs to be defined before we
22 * include any headers.
23 */
24
25 #include "uv.h"
26 #include "internal.h"
27 #include "idna.h"
28
29 #include <errno.h>
30 #include <stddef.h> /* NULL */
31 #include <stdlib.h>
32 #include <string.h>
33 #include <net/if.h> /* if_indextoname() */
34
35 /* EAI_* constants. */
36 #include <netdb.h>
37
38
uv__getaddrinfo_translate_error(int sys_err)39 int uv__getaddrinfo_translate_error(int sys_err) {
40 switch (sys_err) {
41 case 0: return 0;
42 #if defined(EAI_ADDRFAMILY)
43 case EAI_ADDRFAMILY: return UV_EAI_ADDRFAMILY;
44 #endif
45 #if defined(EAI_AGAIN)
46 case EAI_AGAIN: return UV_EAI_AGAIN;
47 #endif
48 #if defined(EAI_BADFLAGS)
49 case EAI_BADFLAGS: return UV_EAI_BADFLAGS;
50 #endif
51 #if defined(EAI_BADHINTS)
52 case EAI_BADHINTS: return UV_EAI_BADHINTS;
53 #endif
54 #if defined(EAI_CANCELED)
55 case EAI_CANCELED: return UV_EAI_CANCELED;
56 #endif
57 #if defined(EAI_FAIL)
58 case EAI_FAIL: return UV_EAI_FAIL;
59 #endif
60 #if defined(EAI_FAMILY)
61 case EAI_FAMILY: return UV_EAI_FAMILY;
62 #endif
63 #if defined(EAI_MEMORY)
64 case EAI_MEMORY: return UV_EAI_MEMORY;
65 #endif
66 #if defined(EAI_NODATA)
67 case EAI_NODATA: return UV_EAI_NODATA;
68 #endif
69 #if defined(EAI_NONAME)
70 # if !defined(EAI_NODATA) || EAI_NODATA != EAI_NONAME
71 case EAI_NONAME: return UV_EAI_NONAME;
72 # endif
73 #endif
74 #if defined(EAI_OVERFLOW)
75 case EAI_OVERFLOW: return UV_EAI_OVERFLOW;
76 #endif
77 #if defined(EAI_PROTOCOL)
78 case EAI_PROTOCOL: return UV_EAI_PROTOCOL;
79 #endif
80 #if defined(EAI_SERVICE)
81 case EAI_SERVICE: return UV_EAI_SERVICE;
82 #endif
83 #if defined(EAI_SOCKTYPE)
84 case EAI_SOCKTYPE: return UV_EAI_SOCKTYPE;
85 #endif
86 #if defined(EAI_SYSTEM)
87 case EAI_SYSTEM: return UV__ERR(errno);
88 #endif
89 }
90 assert(!"unknown EAI_* error code");
91 abort();
92 #ifndef __SUNPRO_C
93 return 0; /* Pacify compiler. */
94 #endif
95 }
96
97
uv__getaddrinfo_work(struct uv__work * w)98 static void uv__getaddrinfo_work(struct uv__work* w) {
99 uv_getaddrinfo_t* req;
100 int err;
101
102 req = container_of(w, uv_getaddrinfo_t, work_req);
103 err = getaddrinfo(req->hostname, req->service, req->hints, &req->addrinfo);
104 req->retcode = uv__getaddrinfo_translate_error(err);
105 }
106
107
uv__getaddrinfo_done(struct uv__work * w,int status)108 static void uv__getaddrinfo_done(struct uv__work* w, int status) {
109 uv_getaddrinfo_t* req;
110
111 req = container_of(w, uv_getaddrinfo_t, work_req);
112 uv__req_unregister(req->loop);
113
114 /* See initialization in uv_getaddrinfo(). */
115 if (req->hints)
116 uv__free(req->hints);
117 else if (req->service)
118 uv__free(req->service);
119 else if (req->hostname)
120 uv__free(req->hostname);
121 else
122 assert(0);
123
124 req->hints = NULL;
125 req->service = NULL;
126 req->hostname = NULL;
127
128 if (status == UV_ECANCELED) {
129 assert(req->retcode == 0);
130 req->retcode = UV_EAI_CANCELED;
131 }
132
133 if (req->cb)
134 req->cb(req, req->retcode, req->addrinfo);
135 }
136
137
uv_getaddrinfo(uv_loop_t * loop,uv_getaddrinfo_t * req,uv_getaddrinfo_cb cb,const char * hostname,const char * service,const struct addrinfo * hints)138 int uv_getaddrinfo(uv_loop_t* loop,
139 uv_getaddrinfo_t* req,
140 uv_getaddrinfo_cb cb,
141 const char* hostname,
142 const char* service,
143 const struct addrinfo* hints) {
144 char hostname_ascii[256];
145 size_t hostname_len;
146 size_t service_len;
147 size_t hints_len;
148 size_t len;
149 char* buf;
150 long rc;
151
152 if (req == NULL || (hostname == NULL && service == NULL))
153 return UV_EINVAL;
154
155 /* FIXME(bnoordhuis) IDNA does not seem to work z/OS,
156 * probably because it uses EBCDIC rather than ASCII.
157 */
158 #ifdef __MVS__
159 (void) &hostname_ascii;
160 #else
161 if (hostname != NULL) {
162 rc = uv__idna_toascii(hostname,
163 hostname + strlen(hostname),
164 hostname_ascii,
165 hostname_ascii + sizeof(hostname_ascii));
166 if (rc < 0)
167 return rc;
168 hostname = hostname_ascii;
169 }
170 #endif
171
172 hostname_len = hostname ? strlen(hostname) + 1 : 0;
173 service_len = service ? strlen(service) + 1 : 0;
174 hints_len = hints ? sizeof(*hints) : 0;
175 buf = uv__malloc(hostname_len + service_len + hints_len);
176
177 if (buf == NULL)
178 return UV_ENOMEM;
179
180 uv__req_init(loop, req, UV_GETADDRINFO);
181 req->loop = loop;
182 req->cb = cb;
183 req->addrinfo = NULL;
184 req->hints = NULL;
185 req->service = NULL;
186 req->hostname = NULL;
187 req->retcode = 0;
188
189 /* order matters, see uv_getaddrinfo_done() */
190 len = 0;
191
192 if (hints) {
193 req->hints = memcpy(buf + len, hints, sizeof(*hints));
194 len += sizeof(*hints);
195 }
196
197 if (service) {
198 req->service = memcpy(buf + len, service, service_len);
199 len += service_len;
200 }
201
202 if (hostname)
203 req->hostname = memcpy(buf + len, hostname, hostname_len);
204
205 if (cb) {
206 uv__work_submit(loop,
207 &req->work_req,
208 UV__WORK_SLOW_IO,
209 uv__getaddrinfo_work,
210 uv__getaddrinfo_done);
211 return 0;
212 } else {
213 uv__getaddrinfo_work(&req->work_req);
214 uv__getaddrinfo_done(&req->work_req, 0);
215 return req->retcode;
216 }
217 }
218
219
uv_freeaddrinfo(struct addrinfo * ai)220 void uv_freeaddrinfo(struct addrinfo* ai) {
221 if (ai)
222 freeaddrinfo(ai);
223 }
224
225
uv_if_indextoname(unsigned int ifindex,char * buffer,size_t * size)226 int uv_if_indextoname(unsigned int ifindex, char* buffer, size_t* size) {
227 char ifname_buf[UV_IF_NAMESIZE];
228 size_t len;
229
230 if (buffer == NULL || size == NULL || *size == 0)
231 return UV_EINVAL;
232
233 if (if_indextoname(ifindex, ifname_buf) == NULL)
234 return UV__ERR(errno);
235
236 len = strnlen(ifname_buf, sizeof(ifname_buf));
237
238 if (*size <= len) {
239 *size = len + 1;
240 return UV_ENOBUFS;
241 }
242
243 memcpy(buffer, ifname_buf, len);
244 buffer[len] = '\0';
245 *size = len;
246
247 return 0;
248 }
249
uv_if_indextoiid(unsigned int ifindex,char * buffer,size_t * size)250 int uv_if_indextoiid(unsigned int ifindex, char* buffer, size_t* size) {
251 return uv_if_indextoname(ifindex, buffer, size);
252 }
253
