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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* Expose glibc-specific EAI_* error codes. Needs to be defined before we
* include any headers.
*/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include "uv.h"
#include "internal.h"
#include <errno.h>
#include <stddef.h> /* NULL */
#include <stdlib.h>
#include <string.h>
#include <net/if.h> /* if_indextoname() */
/* EAI_* constants. */
#include <netdb.h>
int uv__getaddrinfo_translate_error(int sys_err) {
switch (sys_err) {
case 0: return 0;
#if defined(EAI_ADDRFAMILY)
case EAI_ADDRFAMILY: return UV_EAI_ADDRFAMILY;
#endif
#if defined(EAI_AGAIN)
case EAI_AGAIN: return UV_EAI_AGAIN;
#endif
#if defined(EAI_BADFLAGS)
case EAI_BADFLAGS: return UV_EAI_BADFLAGS;
#endif
#if defined(EAI_BADHINTS)
case EAI_BADHINTS: return UV_EAI_BADHINTS;
#endif
#if defined(EAI_CANCELED)
case EAI_CANCELED: return UV_EAI_CANCELED;
#endif
#if defined(EAI_FAIL)
case EAI_FAIL: return UV_EAI_FAIL;
#endif
#if defined(EAI_FAMILY)
case EAI_FAMILY: return UV_EAI_FAMILY;
#endif
#if defined(EAI_MEMORY)
case EAI_MEMORY: return UV_EAI_MEMORY;
#endif
#if defined(EAI_NODATA)
case EAI_NODATA: return UV_EAI_NODATA;
#endif
#if defined(EAI_NONAME)
# if !defined(EAI_NODATA) || EAI_NODATA != EAI_NONAME
case EAI_NONAME: return UV_EAI_NONAME;
# endif
#endif
#if defined(EAI_OVERFLOW)
case EAI_OVERFLOW: return UV_EAI_OVERFLOW;
#endif
#if defined(EAI_PROTOCOL)
case EAI_PROTOCOL: return UV_EAI_PROTOCOL;
#endif
#if defined(EAI_SERVICE)
case EAI_SERVICE: return UV_EAI_SERVICE;
#endif
#if defined(EAI_SOCKTYPE)
case EAI_SOCKTYPE: return UV_EAI_SOCKTYPE;
#endif
#if defined(EAI_SYSTEM)
case EAI_SYSTEM: return -errno;
#endif
}
assert(!"unknown EAI_* error code");
abort();
return 0; /* Pacify compiler. */
}
static void uv__getaddrinfo_work(struct uv__work* w) {
uv_getaddrinfo_t* req;
int err;
req = container_of(w, uv_getaddrinfo_t, work_req);
err = getaddrinfo(req->hostname, req->service, req->hints, &req->addrinfo);
req->retcode = uv__getaddrinfo_translate_error(err);
}
static void uv__getaddrinfo_done(struct uv__work* w, int status) {
uv_getaddrinfo_t* req;
req = container_of(w, uv_getaddrinfo_t, work_req);
uv__req_unregister(req->loop, req);
/* See initialization in uv_getaddrinfo(). */
if (req->hints)
uv__free(req->hints);
else if (req->service)
uv__free(req->service);
else if (req->hostname)
uv__free(req->hostname);
else
assert(0);
req->hints = NULL;
req->service = NULL;
req->hostname = NULL;
if (status == -ECANCELED) {
assert(req->retcode == 0);
req->retcode = UV_EAI_CANCELED;
}
if (req->cb)
req->cb(req, req->retcode, req->addrinfo);
}
int uv_getaddrinfo(uv_loop_t* loop,
uv_getaddrinfo_t* req,
uv_getaddrinfo_cb cb,
const char* hostname,
const char* service,
const struct addrinfo* hints) {
size_t hostname_len;
size_t service_len;
size_t hints_len;
size_t len;
char* buf;
if (req == NULL || (hostname == NULL && service == NULL))
return -EINVAL;
hostname_len = hostname ? strlen(hostname) + 1 : 0;
service_len = service ? strlen(service) + 1 : 0;
hints_len = hints ? sizeof(*hints) : 0;
buf = uv__malloc(hostname_len + service_len + hints_len);
if (buf == NULL)
return -ENOMEM;
uv__req_init(loop, req, UV_GETADDRINFO);
req->loop = loop;
req->cb = cb;
req->addrinfo = NULL;
req->hints = NULL;
req->service = NULL;
req->hostname = NULL;
req->retcode = 0;
/* order matters, see uv_getaddrinfo_done() */
len = 0;
if (hints) {
req->hints = memcpy(buf + len, hints, sizeof(*hints));
len += sizeof(*hints);
}
if (service) {
req->service = memcpy(buf + len, service, service_len);
len += service_len;
}
if (hostname)
req->hostname = memcpy(buf + len, hostname, hostname_len);
if (cb) {
uv__work_submit(loop,
&req->work_req,
uv__getaddrinfo_work,
uv__getaddrinfo_done);
return 0;
} else {
uv__getaddrinfo_work(&req->work_req);
uv__getaddrinfo_done(&req->work_req, 0);
return req->retcode;
}
}
void uv_freeaddrinfo(struct addrinfo* ai) {
if (ai)
freeaddrinfo(ai);
}
int uv_if_indextoname(unsigned int ifindex, char* buffer, size_t* size) {
char ifname_buf[UV_IF_NAMESIZE];
size_t len;
if (buffer == NULL || size == NULL || *size == 0)
return UV_EINVAL;
if (if_indextoname(ifindex, ifname_buf) == NULL)
return -errno;
len = strnlen(ifname_buf, sizeof(ifname_buf));
if (*size <= len) {
*size = len + 1;
return UV_ENOBUFS;
}
memcpy(buffer, ifname_buf, len);
buffer[len] = '\0';
*size = len;
return 0;
}
int uv_if_indextoiid(unsigned int ifindex, char* buffer, size_t* size) {
return uv_if_indextoname(ifindex, buffer, size);
}
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