diff options
Diffstat (limited to 'sysdeps/gnu/ifaddrs.c')
| -rw-r--r-- | sysdeps/gnu/ifaddrs.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/sysdeps/gnu/ifaddrs.c b/sysdeps/gnu/ifaddrs.c deleted file mode 100644 index 37b3248669..0000000000 --- a/sysdeps/gnu/ifaddrs.c +++ /dev/null @@ -1,164 +0,0 @@ -/* getifaddrs -- get names and addresses of all network interfaces - Copyright (C) 2002-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <ifaddrs.h> -#include <net/if.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <netinet/in.h> - -#include "ifreq.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) -{ - /* This implementation handles only IPv4 interfaces. - The various ioctls below will only work on an AF_INET socket. - Some different mechanism entirely must be used for IPv6. */ - int fd = __socket (AF_INET, SOCK_DGRAM, 0); - struct ifreq *ifreqs; - int nifs; - - if (fd < 0) - return -1; - - __ifreq (&ifreqs, &nifs, fd); - if (ifreqs == NULL) /* XXX doesn't distinguish error vs none */ - { - __close (fd); - return -1; - } - - /* Now we have the list of interfaces and each one's address. - Put it into the expected format and fill in the remaining details. */ - if (nifs == 0) - *ifap = NULL; - else - { - struct - { - struct ifaddrs ia; - struct sockaddr addr, netmask, broadaddr; - char name[IF_NAMESIZE]; - } *storage; - struct ifreq *ifr; - int i; - - storage = malloc (nifs * sizeof storage[0]); - if (storage == NULL) - { - __close (fd); - __if_freereq (ifreqs, nifs); - return -1; - } - - i = 0; - ifr = ifreqs; - do - { - /* Fill in pointers to the storage we've already allocated. */ - storage[i].ia.ifa_next = &storage[i + 1].ia; - storage[i].ia.ifa_addr = &storage[i].addr; - - /* Now copy the information we already have from SIOCGIFCONF. */ - storage[i].ia.ifa_name = strncpy (storage[i].name, ifr->ifr_name, - sizeof storage[i].name); - storage[i].addr = ifr->ifr_addr; - - /* The SIOCGIFCONF call filled in only the name and address. - Now we must also ask for the other information we need. */ - - if (__ioctl (fd, SIOCGIFFLAGS, ifr) < 0) - break; - storage[i].ia.ifa_flags = ifr->ifr_flags; - - ifr->ifr_addr = storage[i].addr; - - if (__ioctl (fd, SIOCGIFNETMASK, ifr) < 0) - storage[i].ia.ifa_netmask = NULL; - else - { - storage[i].ia.ifa_netmask = &storage[i].netmask; - storage[i].netmask = ifr->ifr_netmask; - } - - if (ifr->ifr_flags & IFF_BROADCAST) - { - ifr->ifr_addr = storage[i].addr; - if (__ioctl (fd, SIOCGIFBRDADDR, ifr) < 0) - storage[i].ia.ifa_broadaddr = NULL; - { - storage[i].ia.ifa_broadaddr = &storage[i].broadaddr; - storage[i].broadaddr = ifr->ifr_broadaddr; - } - } - else if (ifr->ifr_flags & IFF_POINTOPOINT) - { - ifr->ifr_addr = storage[i].addr; - if (__ioctl (fd, SIOCGIFDSTADDR, ifr) < 0) - storage[i].ia.ifa_broadaddr = NULL; - else - { - storage[i].ia.ifa_broadaddr = &storage[i].broadaddr; - storage[i].broadaddr = ifr->ifr_dstaddr; - } - } - else - storage[i].ia.ifa_broadaddr = NULL; - - storage[i].ia.ifa_data = NULL; /* Nothing here for now. */ - - ifr = __if_nextreq (ifr); - } while (++i < nifs); - if (i < nifs) /* Broke out early on error. */ - { - __close (fd); - free (storage); - __if_freereq (ifreqs, nifs); - return -1; - } - - storage[i - 1].ia.ifa_next = NULL; - - *ifap = &storage[0].ia; - - __close (fd); - __if_freereq (ifreqs, nifs); - } - - return 0; -} -weak_alias (__getifaddrs, getifaddrs) -#ifndef getifaddrs -libc_hidden_weak (getifaddrs) -#endif - -void -__freeifaddrs (struct ifaddrs *ifa) -{ - free (ifa); -} -weak_alias (__freeifaddrs, freeifaddrs) -libc_hidden_weak (freeifaddrs) |