Add getifaddrs(3) and freeifaddrs(3).
This commit is contained in:
Jonas 'Sortie' Termansen
parent
f291054465
commit
580b71ae89
|
|
@ -378,6 +378,8 @@ grp/getgrnam.o \
|
|||
grp/getgrnam_r.o \
|
||||
grp/opengr.o \
|
||||
grp/setgrent.o \
|
||||
ifaddrs/freeifaddrs.o \
|
||||
ifaddrs/getifaddrs.o \
|
||||
init/init.o \
|
||||
ioleast/preadall.o \
|
||||
ioleast/preadleast.o \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,31 @@
|
|||
/*
|
||||
* Copyright (c) 2016 Jonas 'Sortie' Termansen.
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* ifaddrs/freeifaddrs.c
|
||||
* Free list of network interface addresses.
|
||||
*/
|
||||
|
||||
#include <ifaddrs.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
void freeifaddrs(struct ifaddrs* ifa)
|
||||
{
|
||||
while ( ifa )
|
||||
{
|
||||
struct ifaddrs* todelete = ifa;
|
||||
ifa = ifa->ifa_next;
|
||||
free(todelete);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,114 @@
|
|||
/*
|
||||
* Copyright (c) 2016, 2017 Jonas 'Sortie' Termansen.
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* ifaddrs/getifaddrs.c
|
||||
* List network interface addresses.
|
||||
*/
|
||||
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/socket.h>
|
||||
|
||||
#include <endian.h>
|
||||
#include <fcntl.h>
|
||||
#include <ifaddrs.h>
|
||||
#include <net/if.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
|
||||
union ifaddrs_addr
|
||||
{
|
||||
struct sockaddr_in in;
|
||||
struct sockaddr_in6 in6;
|
||||
};
|
||||
|
||||
struct ifaddrs_storage
|
||||
{
|
||||
struct ifaddrs pub;
|
||||
char name[IF_NAMESIZE];
|
||||
union ifaddrs_addr addr;
|
||||
union ifaddrs_addr netmask;
|
||||
union ifaddrs_addr broadcast;
|
||||
};
|
||||
|
||||
int getifaddrs(struct ifaddrs** ifas_ptr)
|
||||
{
|
||||
struct if_nameindex* ifs = if_nameindex();
|
||||
if ( !ifs )
|
||||
return -1;
|
||||
size_t ifcount = 0;
|
||||
while ( ifs[ifcount].if_index )
|
||||
ifcount++;
|
||||
struct ifaddrs* ifas = NULL;
|
||||
size_t i = ifcount;
|
||||
while ( i-- )
|
||||
{
|
||||
struct if_nameindex* netif = &ifs[i];
|
||||
char path[5 + IF_NAMESIZE];
|
||||
snprintf(path, sizeof(path), "/dev/%s", netif->if_name);
|
||||
int fd = open(path, O_RDONLY);
|
||||
if ( fd < 0 )
|
||||
{
|
||||
if_freenameindex(ifs);
|
||||
freeifaddrs(ifas);
|
||||
return -1;
|
||||
}
|
||||
struct if_config cfg;
|
||||
if ( ioctl(fd, NIOC_GETCONFIG, &cfg) < 0 )
|
||||
{
|
||||
close(fd);
|
||||
if_freenameindex(ifs);
|
||||
freeifaddrs(ifas);
|
||||
return -1;
|
||||
}
|
||||
close(fd);
|
||||
if ( be32toh(cfg.inet.address.s_addr) != INADDR_ANY )
|
||||
{
|
||||
struct ifaddrs_storage* ifa =
|
||||
calloc(sizeof(struct ifaddrs_storage), 1);
|
||||
if ( !ifa )
|
||||
{
|
||||
if_freenameindex(ifs);
|
||||
freeifaddrs(ifas);
|
||||
return -1;
|
||||
}
|
||||
ifa->pub.ifa_next = ifas;
|
||||
ifas = &ifa->pub;
|
||||
strlcpy(ifa->name, netif->if_name, sizeof(ifa->name));
|
||||
ifa->pub.ifa_name = ifa->name;
|
||||
ifa->pub.ifa_flags = 0;
|
||||
ifa->addr.in.sin_family = AF_INET;
|
||||
memcpy(&ifa->addr.in.sin_addr, &cfg.inet.address,
|
||||
sizeof(struct in_addr));
|
||||
ifa->pub.ifa_addr = (struct sockaddr*) &ifa->addr.in;
|
||||
ifa->netmask.in.sin_family = AF_INET;
|
||||
memcpy(&ifa->netmask.in.sin_addr, &cfg.inet.subnet,
|
||||
sizeof(struct in_addr));
|
||||
ifa->pub.ifa_netmask = (struct sockaddr*) &ifa->netmask.in;
|
||||
ifa->broadcast.in.sin_family = AF_INET;
|
||||
ifa->broadcast.in.sin_addr.s_addr =
|
||||
ifa->addr.in.sin_addr.s_addr |
|
||||
~ifa->netmask.in.sin_addr.s_addr;
|
||||
ifa->pub.ifa_dstaddr = (struct sockaddr*) &ifa->broadcast.in;
|
||||
ifa->pub.ifa_data = NULL;
|
||||
ifa->pub.ifa_size = sizeof(struct sockaddr_in);
|
||||
}
|
||||
// TODO: IPv6 when struct if_config has IPv6 support.
|
||||
}
|
||||
if_freenameindex(ifs);
|
||||
*ifas_ptr = ifas;
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
/*
|
||||
* Copyright (c) 2016 Jonas 'Sortie' Termansen.
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* ifaddrs.h
|
||||
* Network interface addresses.
|
||||
*/
|
||||
|
||||
#ifndef _INCLUDE_IFADDRS_H
|
||||
#define _INCLUDE_IFADDRS_H
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
|
||||
#include <sys/__/types.h>
|
||||
|
||||
#ifndef __socklen_t_defined
|
||||
#define __socklen_t_defined
|
||||
typedef __socklen_t socklen_t;
|
||||
#endif
|
||||
|
||||
struct ifaddrs
|
||||
{
|
||||
struct ifaddrs* ifa_next;
|
||||
char* ifa_name;
|
||||
unsigned int ifa_flags;
|
||||
struct sockaddr* ifa_addr;
|
||||
struct sockaddr* ifa_netmask;
|
||||
struct sockaddr* ifa_dstaddr;
|
||||
void* ifa_data;
|
||||
socklen_t ifa_size;
|
||||
};
|
||||
|
||||
#ifndef ifa_broadaddr
|
||||
#define ifa_broadaddr ifa_dstaddr
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
int getifaddrs(struct ifaddrs**);
|
||||
void freeifaddrs(struct ifaddrs*);
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern "C" */
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -330,6 +330,7 @@ temporarily fail with
|
|||
.Xr getsockopt 2 ,
|
||||
.Xr ioctl 2 ,
|
||||
.Xr setsockopt 2 ,
|
||||
.Xr getifaddrs 3 ,
|
||||
.Xr if_nameindex 3 ,
|
||||
.Xr arp 4 ,
|
||||
.Xr ether 4 ,
|
||||
|
|
|
|||
Loading…
Reference in New Issue