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/* Copyright libuv project contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "internal.h"
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#include <errno.h>
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#include <stddef.h>
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#include <ifaddrs.h>
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#include <net/if.h>
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#if !defined(__CYGWIN__) && !defined(__MSYS__)
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#include <net/if_dl.h>
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#endif
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#if defined(__HAIKU__)
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#define IFF_RUNNING IFF_LINK
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#endif
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static int uv__ifaddr_exclude(struct ifaddrs *ent, int exclude_type) {
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if (!((ent->ifa_flags & IFF_UP) && (ent->ifa_flags & IFF_RUNNING)))
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return 1;
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if (ent->ifa_addr == NULL)
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return 1;
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#if !defined(__CYGWIN__) && !defined(__MSYS__)
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/*
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* If `exclude_type` is `UV__EXCLUDE_IFPHYS`, just see whether `sa_family`
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* equals to `AF_LINK` or not. Otherwise, the result depends on the operation
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* system with `AF_LINK` or `PF_INET`.
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*/
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if (exclude_type == UV__EXCLUDE_IFPHYS)
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return (ent->ifa_addr->sa_family != AF_LINK);
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#endif
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#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__DragonFly__) || \
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defined(__HAIKU__)
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/*
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* On BSD getifaddrs returns information related to the raw underlying
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* devices. We're not interested in this information.
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*/
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if (ent->ifa_addr->sa_family == AF_LINK)
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return 1;
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#elif defined(__NetBSD__) || defined(__OpenBSD__)
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if (ent->ifa_addr->sa_family != PF_INET &&
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ent->ifa_addr->sa_family != PF_INET6)
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return 1;
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#endif
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return 0;
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}
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int uv_interface_addresses(uv_interface_address_t** addresses, int* count) {
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struct ifaddrs* addrs;
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struct ifaddrs* ent;
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uv_interface_address_t* address;
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#if !(defined(__CYGWIN__) || defined(__MSYS__))
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int i;
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#endif
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*count = 0;
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*addresses = NULL;
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if (getifaddrs(&addrs) != 0)
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return UV__ERR(errno);
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/* Count the number of interfaces */
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for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
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if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
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continue;
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(*count)++;
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}
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if (*count == 0) {
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freeifaddrs(addrs);
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return 0;
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}
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/* Make sure the memory is initiallized to zero using calloc() */
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*addresses = uv__calloc(*count, sizeof(**addresses));
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if (*addresses == NULL) {
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freeifaddrs(addrs);
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return UV_ENOMEM;
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}
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address = *addresses;
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for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
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if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
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continue;
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address->name = uv__strdup(ent->ifa_name);
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if (ent->ifa_addr->sa_family == AF_INET6) {
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address->address.address6 = *((struct sockaddr_in6*) ent->ifa_addr);
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} else {
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address->address.address4 = *((struct sockaddr_in*) ent->ifa_addr);
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}
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if (ent->ifa_netmask->sa_family == AF_INET6) {
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address->netmask.netmask6 = *((struct sockaddr_in6*) ent->ifa_netmask);
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} else {
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address->netmask.netmask4 = *((struct sockaddr_in*) ent->ifa_netmask);
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}
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address->is_internal = !!(ent->ifa_flags & IFF_LOOPBACK);
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address++;
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}
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#if !(defined(__CYGWIN__) || defined(__MSYS__))
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/* Fill in physical addresses for each interface */
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for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
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if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFPHYS))
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continue;
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address = *addresses;
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for (i = 0; i < *count; i++) {
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if (strcmp(address->name, ent->ifa_name) == 0) {
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struct sockaddr_dl* sa_addr;
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sa_addr = (struct sockaddr_dl*)(ent->ifa_addr);
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memcpy(address->phys_addr, LLADDR(sa_addr), sizeof(address->phys_addr));
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}
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address++;
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}
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}
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#endif
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freeifaddrs(addrs);
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return 0;
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}
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void uv_free_interface_addresses(uv_interface_address_t* addresses,
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int count) {
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int i;
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for (i = 0; i < count; i++) {
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uv__free(addresses[i].name);
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}
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uv__free(addresses);
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}
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