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/* getifaddrs -- get names and addresses of all network interfaces
Copyright (C) 2013-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <ifaddrs.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <hurd.h>
#include <hurd/paths.h>
#include <hurd/lookup.h>
#include <hurd/fs.h>
/* Create a linked list of `struct ifaddrs' structures, one for each
network interface on the host machine. If successful, store the
list in *IFAP and return 0. On errors, return -1 and set `errno'. */
int
__getifaddrs (struct ifaddrs **ifap)
{
/* XXX: Hackish. This assumes pfinet parameter style, and that the same
pfinet is on /servers/socket/2 and /servers/socket/26.
To be replaced by something like a netlink protocol, or fix ifreq into
using sockaddr_storage (but break existing compiled programs using it). */
file_t node;
char *argz = 0, *cur;
size_t argz_len = 0;
unsigned naddrs;
const char *ifa_name = NULL;
char *addr, *cidr_a;
int cidr;
node = __file_name_lookup (_SERVERS_SOCKET "/2", 0, 0666);
if (node == MACH_PORT_NULL)
return -1;
__file_get_fs_options (node, &argz, &argz_len);
__mach_port_deallocate (__mach_task_self (), node);
/* XXX: Two hardcoded for lo */
naddrs = 2;
for (cur = argz; cur < argz + argz_len; cur = cur + strlen (cur) + 1)
{
if (!strncmp (cur, "--address=", 10))
naddrs++;
else if (!strncmp (cur, "--address6=", 11))
naddrs++;
}
{
struct
{
struct ifaddrs ia;
struct sockaddr_storage addr, netmask, broadaddr;
char name[IF_NAMESIZE];
} *storage;
int i;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
storage = malloc (naddrs * sizeof storage[0]);
if (storage == NULL)
{
__munmap (argz, argz_len);
return -1;
}
i = 0;
/* XXX: Hardcoded lo interface */
ifa_name = "lo";
/* 127.0.0.1/8 */
storage[i].ia.ifa_next = &storage[i + 1].ia;
storage[i].ia.ifa_name = strncpy (storage[i].name, ifa_name, sizeof (storage[i].name));
storage[i].ia.ifa_addr = (struct sockaddr *) &storage[i].addr;
sin = ((struct sockaddr_in *) &storage[i].addr);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
sin->sin_addr.s_addr = htonl (INADDR_LOOPBACK);
storage[i].ia.ifa_netmask = (struct sockaddr *) &storage[i].netmask;
sin = ((struct sockaddr_in *) &storage[i].netmask);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
sin->sin_addr.s_addr = htonl (IN_CLASSA_NET);
storage[i].ia.ifa_broadaddr = (struct sockaddr *) &storage[i].addr;
storage[i].ia.ifa_flags = IFF_UP | IFF_LOOPBACK | IFF_RUNNING;
storage[i].ia.ifa_data = NULL; /* Nothing here for now. */
i++;
/* ::1/128 */
storage[i].ia.ifa_next = &storage[i + 1].ia;
storage[i].ia.ifa_name = strncpy (storage[i].name, ifa_name, sizeof (storage[i].name));
storage[i].ia.ifa_addr = (struct sockaddr *) &storage[i].addr;
sin6 = ((struct sockaddr_in6 *) &storage[i].addr);
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = 0;
sin6->sin6_flowinfo = 0;
inet_pton (AF_INET6, "::1", &sin6->sin6_addr);
sin6->sin6_scope_id = 0;
storage[i].ia.ifa_netmask = (struct sockaddr *) &storage[i].netmask;
sin6 = ((struct sockaddr_in6 *) &storage[i].netmask);
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = 0;
sin6->sin6_flowinfo = 0;
inet_pton (AF_INET6, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", &sin6->sin6_addr);
sin6->sin6_scope_id = 0;
storage[i].ia.ifa_broadaddr = NULL;
storage[i].ia.ifa_flags = IFF_UP | IFF_LOOPBACK | IFF_RUNNING;
storage[i].ia.ifa_data = NULL; /* Nothing here for now. */
for (cur = argz; cur < argz + argz_len; cur = cur + strlen (cur) + 1)
{
if (!strncmp (cur, "--interface=", 12))
{
ifa_name = cur + 12;
continue;
}
else if (!strncmp (cur, "--address=", 10))
{
i++;
/* IPv4 address */
addr = cur + 10;
storage[i].ia.ifa_next = &storage[i + 1].ia;
storage[i].ia.ifa_name = strncpy (storage[i].name, ifa_name, sizeof (storage[i].name));
storage[i].ia.ifa_addr = (struct sockaddr *) &storage[i].addr;
sin = ((struct sockaddr_in *) &storage[i].addr);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
inet_pton (AF_INET, addr, &sin->sin_addr);
storage[i].ia.ifa_netmask = NULL;
storage[i].ia.ifa_broadaddr = NULL;
storage[i].ia.ifa_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING | IFF_MULTICAST;
storage[i].ia.ifa_data = NULL; /* Nothing here for now. */
}
else if (!strncmp (cur, "--netmask=", 10))
{
/* IPv4 netmask */
addr = cur + 10;
storage[i].ia.ifa_netmask = (struct sockaddr *) &storage[i].netmask;
sin = ((struct sockaddr_in *) &storage[i].netmask);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
inet_pton (AF_INET, addr, &sin->sin_addr);
storage[i].ia.ifa_broadaddr = (struct sockaddr *) &storage[i].broadaddr;
sin = ((struct sockaddr_in *) &storage[i].broadaddr);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
sin->sin_addr.s_addr =
((struct sockaddr_in *) &storage[i].addr)->sin_addr.s_addr
| ~(((struct sockaddr_in *) &storage[i].netmask)->sin_addr.s_addr);
}
else if (!strncmp (cur, "--peer=", 7))
{
/* IPv4 peer */
addr = cur + 7;
storage[i].ia.ifa_dstaddr = (struct sockaddr *) &storage[i].broadaddr;
sin = ((struct sockaddr_in *) &storage[i].broadaddr);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
inet_pton (AF_INET, addr, &sin->sin_addr);
storage[i].ia.ifa_flags &= ~IFF_BROADCAST;
storage[i].ia.ifa_flags |= IFF_POINTOPOINT;
}
else if (!strncmp (cur, "--address6=", 11))
{
i++;
/* IPv6 address */
addr = cur + 11;
cidr_a = strchr (addr, '/');
if (!cidr_a)
{
/* No CIDR length?! Assume 64. */
addr = __strdup (addr);
cidr = 64;
}
else
{
addr = __strndup (addr, cidr_a - addr);
cidr = atoi (cidr_a + 1);
}
storage[i].ia.ifa_next = &storage[i + 1].ia;
storage[i].ia.ifa_name = strncpy (storage[i].name, ifa_name, sizeof (storage[i].name));
storage[i].ia.ifa_addr = (struct sockaddr *) &storage[i].addr;
sin6 = ((struct sockaddr_in6 *) &storage[i].addr);
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = 0;
sin6->sin6_flowinfo = 0;
inet_pton (AF_INET6, addr, &sin6->sin6_addr);
sin6->sin6_scope_id = 0;
storage[i].ia.ifa_netmask = (struct sockaddr *) &storage[i].netmask;
sin6 = ((struct sockaddr_in6 *) &storage[i].netmask);
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = 0;
sin6->sin6_flowinfo = 0;
sin6->sin6_addr.s6_addr32[0] = htonl (cidr >= 32 ? 0xffffffffUL : cidr <= 0 ? 0 : ~((1UL << ( 32 - cidr)) - 1));
sin6->sin6_addr.s6_addr32[1] = htonl (cidr >= 64 ? 0xffffffffUL : cidr <= 32 ? 0 : ~((1UL << ( 64 - cidr)) - 1));
sin6->sin6_addr.s6_addr32[2] = htonl (cidr >= 96 ? 0xffffffffUL : cidr <= 64 ? 0 : ~((1UL << ( 96 - cidr)) - 1));
sin6->sin6_addr.s6_addr32[3] = htonl (cidr >= 128 ? 0xffffffffUL : cidr <= 96 ? 0 : ~((1UL << (128 - cidr)) - 1));
sin6->sin6_scope_id = 0;
storage[i].ia.ifa_broadaddr = NULL;
storage[i].ia.ifa_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING | IFF_MULTICAST;
storage[i].ia.ifa_data = NULL; /* Nothing here for now. */
free (addr);
}
else if (!strncmp (cur, "--peer6=", 8))
{
/* IPv6 peer */
addr = cur + 8;
storage[i].ia.ifa_dstaddr = (struct sockaddr *) &storage[i].broadaddr;
sin6 = ((struct sockaddr_in6 *) &storage[i].broadaddr);
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = 0;
sin6->sin6_flowinfo = 0;
inet_pton (AF_INET6, addr, &sin6->sin6_addr);
sin6->sin6_scope_id = 0;
storage[i].ia.ifa_flags &= ~IFF_BROADCAST;
storage[i].ia.ifa_flags |= IFF_POINTOPOINT;
}
}
storage[i].ia.ifa_next = NULL;
*ifap = &storage[0].ia;
}
__munmap (argz, argz_len);
return 0;
}
weak_alias (__getifaddrs, getifaddrs)
libc_hidden_def (__getifaddrs)
#ifndef getifaddrs
libc_hidden_weak (getifaddrs)
#endif
void
__freeifaddrs (struct ifaddrs *ifa)
{
free (ifa);
}
weak_alias (__freeifaddrs, freeifaddrs)
libc_hidden_def (__freeifaddrs)
libc_hidden_weak (freeifaddrs)
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