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/* Copyright libuv project 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.
*/
#include "uv.h"
#include "internal.h"
#include <errno.h>
#include <stddef.h>
#include <ifaddrs.h>
#include <net/if.h>
#if !defined(__CYGWIN__) && !defined(__MSYS__)
#include <net/if_dl.h>
#endif
static int uv__ifaddr_exclude(struct ifaddrs *ent, int exclude_type) {
if (!((ent->ifa_flags & IFF_UP) && (ent->ifa_flags & IFF_RUNNING)))
return 1;
if (ent->ifa_addr == NULL)
return 1;
#if !defined(__CYGWIN__) && !defined(__MSYS__)
/*
* If `exclude_type` is `UV__EXCLUDE_IFPHYS`, just see whether `sa_family`
* equals to `AF_LINK` or not. Otherwise, the result depends on the operation
* system with `AF_LINK` or `PF_INET`.
*/
if (exclude_type == UV__EXCLUDE_IFPHYS)
return (ent->ifa_addr->sa_family != AF_LINK);
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__DragonFly__)
/*
* On BSD getifaddrs returns information related to the raw underlying
* devices. We're not interested in this information.
*/
if (ent->ifa_addr->sa_family == AF_LINK)
return 1;
#elif defined(__NetBSD__)
if (ent->ifa_addr->sa_family != PF_INET &&
ent->ifa_addr->sa_family != PF_INET6)
return 1;
#elif defined(__OpenBSD__)
if (ent->ifa_addr->sa_family != PF_INET)
return 1;
#endif
return 0;
}
int uv_interface_addresses(uv_interface_address_t** addresses, int* count) {
struct ifaddrs* addrs;
struct ifaddrs* ent;
uv_interface_address_t* address;
int i;
*count = 0;
*addresses = NULL;
if (getifaddrs(&addrs) != 0)
return UV__ERR(errno);
/* Count the number of interfaces */
for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
continue;
(*count)++;
}
if (*count == 0) {
freeifaddrs(addrs);
return 0;
}
*addresses = uv__malloc(*count * sizeof(**addresses));
if (*addresses == NULL) {
freeifaddrs(addrs);
return UV_ENOMEM;
}
address = *addresses;
for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
continue;
address->name = uv__strdup(ent->ifa_name);
if (ent->ifa_addr->sa_family == AF_INET6) {
address->address.address6 = *((struct sockaddr_in6*) ent->ifa_addr);
} else {
address->address.address4 = *((struct sockaddr_in*) ent->ifa_addr);
}
if (ent->ifa_netmask->sa_family == AF_INET6) {
address->netmask.netmask6 = *((struct sockaddr_in6*) ent->ifa_netmask);
} else {
address->netmask.netmask4 = *((struct sockaddr_in*) ent->ifa_netmask);
}
address->is_internal = !!(ent->ifa_flags & IFF_LOOPBACK);
address++;
}
/* Fill in physical addresses for each interface */
for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFPHYS))
continue;
address = *addresses;
for (i = 0; i < *count; i++) {
#if defined(__CYGWIN__) || defined(__MSYS__)
memset(address->phys_addr, 0, sizeof(address->phys_addr));
#else
if (strcmp(address->name, ent->ifa_name) == 0) {
struct sockaddr_dl* sa_addr;
sa_addr = (struct sockaddr_dl*)(ent->ifa_addr);
memcpy(address->phys_addr, LLADDR(sa_addr), sizeof(address->phys_addr));
} else {
memset(address->phys_addr, 0, sizeof(address->phys_addr));
}
#endif
address++;
}
}
freeifaddrs(addrs);
return 0;
}
void uv_free_interface_addresses(uv_interface_address_t* addresses,
int count) {
int i;
for (i = 0; i < count; i++) {
uv__free(addresses[i].name);
}
uv__free(addresses);
}
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