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getifaddrs() is available on all supported Unix platforms (Linux, BSDs, macOS and Solaris)

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This commit is contained in:
Ondřej Surý
2018-08-21 15:04:40 +02:00
parent 62fb0759e9
commit 1e1804bb96
5 changed files with 0 additions and 1218 deletions
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71
configure vendored
View File

@@ -949,7 +949,6 @@ with_gperftools_profiler
enable_backtrace
enable_symtable
enable_tcp_fastopen
enable_getifaddrs
with_readline
enable_isc_spnego
enable_chroot
@@ -1639,7 +1638,6 @@ Optional Features:
--enable-symtable use internal symbol table for backtrace
[all|minimal(default)|none]
--disable-tcp-fastopen disable TCP Fast Open support [default=autodetect]
--enable-getifaddrs enable the use of getifaddrs() [yes|no].
--disable-isc-spnego use SPNEGO from GSSAPI library
--disable-chroot disable chroot
--disable-linux-caps disable Linux capabilities
@@ -17962,75 +17960,6 @@ $as_echo "disabled" >&6; }
esac
# Check whether --enable-getifaddrs was given.
if test "${enable_getifaddrs+set}" = set; then :
enableval=$enable_getifaddrs; want_getifaddrs="$enableval"
else
want_getifaddrs="yes"
fi
#
# This interface iteration code for getifaddrs() will fall back to using
# /proc/net/if_inet6 if getifaddrs() in glibc doesn't return any IPv6
# addresses.
#
case $want_getifaddrs in
glibc)
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \"--enable-getifaddrs=glibc is no longer required\"" >&5
$as_echo "$as_me: WARNING: \"--enable-getifaddrs=glibc is no longer required\"" >&2;}
ac_fn_c_check_func "$LINENO" "getifaddrs" "ac_cv_func_getifaddrs"
if test "x$ac_cv_func_getifaddrs" = xyes; then :
$as_echo "#define HAVE_GETIFADDRS 1" >>confdefs.h
fi
;;
yes)
ac_fn_c_check_func "$LINENO" "getifaddrs" "ac_cv_func_getifaddrs"
if test "x$ac_cv_func_getifaddrs" = xyes; then :
$as_echo "#define HAVE_GETIFADDRS 1" >>confdefs.h
fi
;;
no)
;;
esac
#
# Look for a sysctl call to get the list of network interfaces.
#
case $ac_cv_header_sys_sysctl_h in
yes)
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for interface list sysctl" >&5
$as_echo_n "checking for interface list sysctl... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#ifdef NET_RT_IFLIST
found_rt_iflist
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "found_rt_iflist" >/dev/null 2>&1; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
$as_echo "#define HAVE_IFLIST_SYSCTL 1" >>confdefs.h
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
rm -f conftest*
;;
esac
#
# Check for some other useful functions that are not ever-present.
#

42
configure.in
View File

@@ -2011,48 +2011,6 @@ int has_tfo() { return (0); }
esac
AC_SUBST(ISC_PLATFORM_HAVETFO)
AC_ARG_ENABLE(getifaddrs,
AS_HELP_STRING([--enable-getifaddrs],
[enable the use of getifaddrs() [yes|no].]),
want_getifaddrs="$enableval", want_getifaddrs="yes")
#
# This interface iteration code for getifaddrs() will fall back to using
# /proc/net/if_inet6 if getifaddrs() in glibc doesn't return any IPv6
# addresses.
#
case $want_getifaddrs in
glibc)
AC_MSG_WARN("--enable-getifaddrs=glibc is no longer required")
AC_CHECK_FUNC(getifaddrs, AC_DEFINE(HAVE_GETIFADDRS))
;;
yes)
AC_CHECK_FUNC(getifaddrs, AC_DEFINE(HAVE_GETIFADDRS))
;;
no)
;;
esac
#
# Look for a sysctl call to get the list of network interfaces.
#
case $ac_cv_header_sys_sysctl_h in
yes)
AC_MSG_CHECKING(for interface list sysctl)
AC_EGREP_CPP(found_rt_iflist, [
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#ifdef NET_RT_IFLIST
found_rt_iflist
#endif
],
[AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IFLIST_SYSCTL)],
[AC_MSG_RESULT(no)])
;;
esac
#
# Check for some other useful functions that are not ever-present.
#

818
lib/isc/unix/ifiter_ioctl.c
View File

@@ -1,818 +0,0 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <config.h>
#include <stdbool.h>
#include <isc/print.h>
/*! \file
* \brief
* Obtain the list of network interfaces using the SIOCGLIFCONF ioctl.
* See netintro(4).
*/
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
#ifdef ISC_PLATFORM_HAVEIF_LADDRCONF
#define lifc_len iflc_len
#define lifc_buf iflc_buf
#define lifc_req iflc_req
#define LIFCONF if_laddrconf
#else
#define ISC_HAVE_LIFC_FAMILY 1
#define ISC_HAVE_LIFC_FLAGS 1
#define LIFCONF lifconf
#endif
#ifdef ISC_PLATFORM_HAVEIF_LADDRREQ
#define lifr_addr iflr_addr
#define lifr_name iflr_name
#define lifr_dstaddr iflr_dstaddr
#define lifr_flags iflr_flags
#define ss_family sa_family
#define LIFREQ if_laddrreq
#else
#define LIFREQ lifreq
#endif
#endif
#define IFITER_MAGIC ISC_MAGIC('I', 'F', 'I', 'T')
#define VALID_IFITER(t) ISC_MAGIC_VALID(t, IFITER_MAGIC)
struct isc_interfaceiter {
unsigned int magic; /* Magic number. */
isc_mem_t *mctx;
int mode;
int socket;
struct ifconf ifc;
void *buf; /* Buffer for sysctl data. */
unsigned int bufsize; /* Bytes allocated. */
unsigned int pos; /* Current offset in
SIOCGIFCONF data */
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
int socket6;
struct LIFCONF lifc;
void *buf6; /* Buffer for sysctl data. */
unsigned int bufsize6; /* Bytes allocated. */
unsigned int pos6; /* Current offset in
SIOCGLIFCONF data */
isc_result_t result6; /* Last result code. */
bool first6;
#endif
#ifdef __linux
FILE * proc;
char entry[ISC_IF_INET6_SZ];
isc_result_t valid;
#endif
isc_interface_t current; /* Current interface data. */
isc_result_t result; /* Last result code. */
};
/*%
* Size of buffer for SIOCGLIFCONF, in bytes. We assume no sane system
* will have more than a megabyte of interface configuration data.
*/
#define IFCONF_BUFSIZE_INITIAL 4096
#define IFCONF_BUFSIZE_MAX 1048576
#ifdef __linux
#ifndef IF_NAMESIZE
# ifdef IFNAMSIZ
# define IF_NAMESIZE IFNAMSIZ
# else
# define IF_NAMESIZE 16
# endif
#endif
#endif
static isc_result_t
getbuf4(isc_interfaceiter_t *iter) {
char strbuf[ISC_STRERRORSIZE];
iter->bufsize = IFCONF_BUFSIZE_INITIAL;
for (;;) {
iter->buf = isc_mem_get(iter->mctx, iter->bufsize);
if (iter->buf == NULL)
return (ISC_R_NOMEMORY);
memset(&iter->ifc.ifc_len, 0, sizeof(iter->ifc.ifc_len));
iter->ifc.ifc_len = iter->bufsize;
iter->ifc.ifc_buf = iter->buf;
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion". It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGIFCONF, (char *)&iter->ifc)
== -1) {
if (errno != EINVAL) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETIFCONFIG,
"get interface "
"configuration: %s"),
strbuf);
goto unexpected;
}
/*
* EINVAL. Retry with a bigger buffer.
*/
} else {
/*
* The ioctl succeeded.
* Some OS's just return what will fit rather
* than set EINVAL if the buffer is too small
* to fit all the interfaces in. If
* ifc.lifc_len is too near to the end of the
* buffer we will grow it just in case and
* retry.
*/
if (iter->ifc.ifc_len + 2 * sizeof(struct ifreq)
< iter->bufsize)
break;
}
if (iter->bufsize >= IFCONF_BUFSIZE_MAX) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_BUFFERMAX,
"get interface "
"configuration: "
"maximum buffer "
"size exceeded"));
goto unexpected;
}
isc_mem_put(iter->mctx, iter->buf, iter->bufsize);
iter->bufsize *= 2;
}
return (ISC_R_SUCCESS);
unexpected:
isc_mem_put(iter->mctx, iter->buf, iter->bufsize);
iter->buf = NULL;
return (ISC_R_UNEXPECTED);
}
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
static isc_result_t
getbuf6(isc_interfaceiter_t *iter) {
char strbuf[ISC_STRERRORSIZE];
isc_result_t result;
iter->bufsize6 = IFCONF_BUFSIZE_INITIAL;
for (;;) {
iter->buf6 = isc_mem_get(iter->mctx, iter->bufsize6);
if (iter->buf6 == NULL)
return (ISC_R_NOMEMORY);
memset(&iter->lifc, 0, sizeof(iter->lifc));
#ifdef ISC_HAVE_LIFC_FAMILY
iter->lifc.lifc_family = AF_INET6;
#endif
#ifdef ISC_HAVE_LIFC_FLAGS
iter->lifc.lifc_flags = 0;
#endif
iter->lifc.lifc_len = iter->bufsize6;
iter->lifc.lifc_buf = iter->buf6;
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion". It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket6, SIOCGLIFCONF, (char *)&iter->lifc)
== -1) {
if (errno != EINVAL) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETIFCONFIG,
"get interface "
"configuration: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/*
* EINVAL. Retry with a bigger buffer.
*/
} else {
/*
* The ioctl succeeded.
* Some OS's just return what will fit rather
* than set EINVAL if the buffer is too small
* to fit all the interfaces in. If
* ifc.ifc_len is too near to the end of the
* buffer we will grow it just in case and
* retry.
*/
if (iter->lifc.lifc_len + 2 * sizeof(struct LIFREQ)
< iter->bufsize6)
break;
}
if (iter->bufsize6 >= IFCONF_BUFSIZE_MAX) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_BUFFERMAX,
"get interface "
"configuration: "
"maximum buffer "
"size exceeded"));
result = ISC_R_UNEXPECTED;
goto cleanup;
}
isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
iter->bufsize6 *= 2;
}
if (iter->lifc.lifc_len != 0)
iter->mode = 6;
return (ISC_R_SUCCESS);
cleanup:
isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
iter->buf6 = NULL;
return (result);
}
#endif
isc_result_t
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp) {
isc_interfaceiter_t *iter;
isc_result_t result;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(mctx != NULL);
REQUIRE(iterp != NULL);
REQUIRE(*iterp == NULL);
iter = isc_mem_get(mctx, sizeof(*iter));
if (iter == NULL)
return (ISC_R_NOMEMORY);
iter->mctx = mctx;
iter->mode = 4;
iter->buf = NULL;
iter->pos = (unsigned int) -1;
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
iter->buf6 = NULL;
iter->pos6 = (unsigned int) -1;
iter->result6 = ISC_R_NOMORE;
iter->socket6 = -1;
iter->first6 = false;
#endif
/*
* Get the interface configuration, allocating more memory if
* necessary.
*/
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
result = isc_net_probeipv6();
if (result == ISC_R_SUCCESS) {
/*
* Create an unbound datagram socket to do the SIOCGLIFCONF
* ioctl on. HP/UX requires an AF_INET6 socket for
* SIOCGLIFCONF to get IPv6 addresses.
*/
if ((iter->socket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_MAKESCANSOCKET,
"making interface "
"scan socket: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto socket6_failure;
}
result = iter->result6 = getbuf6(iter);
if (result != ISC_R_NOTIMPLEMENTED && result != ISC_R_SUCCESS)
goto ioctl6_failure;
}
#endif
if ((iter->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_MAKESCANSOCKET,
"making interface "
"scan socket: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto socket_failure;
}
result = getbuf4(iter);
if (result != ISC_R_SUCCESS)
goto ioctl_failure;
/*
* A newly created iterator has an undefined position
* until isc_interfaceiter_first() is called.
*/
#ifdef __linux
iter->proc = fopen("/proc/net/if_inet6", "r");
iter->valid = ISC_R_FAILURE;
#endif
iter->result = ISC_R_FAILURE;
iter->magic = IFITER_MAGIC;
*iterp = iter;
return (ISC_R_SUCCESS);
ioctl_failure:
if (iter->buf != NULL)
isc_mem_put(mctx, iter->buf, iter->bufsize);
(void) close(iter->socket);
socket_failure:
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
if (iter->buf6 != NULL)
isc_mem_put(mctx, iter->buf6, iter->bufsize6);
ioctl6_failure:
if (iter->socket6 != -1)
(void) close(iter->socket6);
socket6_failure:
#endif
isc_mem_put(mctx, iter, sizeof(*iter));
return (result);
}
/*
* Get information about the current interface to iter->current.
* If successful, return ISC_R_SUCCESS.
* If the interface has an unsupported address family, or if
* some operation on it fails, return ISC_R_IGNORE to make
* the higher-level iterator code ignore it.
*/
static isc_result_t
internal_current4(isc_interfaceiter_t *iter) {
struct ifreq *ifrp;
struct ifreq ifreq;
int family;
char strbuf[ISC_STRERRORSIZE];
#if !defined(ISC_PLATFORM_HAVEIF_LADDRREQ) && defined(SIOCGLIFADDR)
struct lifreq lifreq;
#else
char sabuf[256];
#endif
int i, bits, prefixlen;
REQUIRE(VALID_IFITER(iter));
if (iter->ifc.ifc_len == 0 ||
iter->pos == (unsigned int)iter->ifc.ifc_len) {
#ifdef __linux
return (linux_if_inet6_current(iter));
#else
return (ISC_R_NOMORE);
#endif
}
INSIST( iter->pos < (unsigned int) iter->ifc.ifc_len);
ifrp = (struct ifreq *)((char *) iter->ifc.ifc_req + iter->pos);
memset(&ifreq, 0, sizeof(ifreq));
memmove(&ifreq, ifrp, sizeof(ifreq));
family = ifreq.ifr_addr.sa_family;
if (family != AF_INET && family != AF_INET6)
return (ISC_R_IGNORE);
memset(&iter->current, 0, sizeof(iter->current));
iter->current.af = family;
INSIST(sizeof(ifreq.ifr_name) <= sizeof(iter->current.name));
memset(iter->current.name, 0, sizeof(iter->current.name));
memmove(iter->current.name, ifreq.ifr_name, sizeof(ifreq.ifr_name));
get_addr(family, &iter->current.address,
(struct sockaddr *)&ifrp->ifr_addr, ifreq.ifr_name);
/*
* If the interface does not have a address ignore it.
*/
switch (family) {
case AF_INET:
if (iter->current.address.type.in.s_addr == htonl(INADDR_ANY))
return (ISC_R_IGNORE);
break;
case AF_INET6:
if (memcmp(&iter->current.address.type.in6, &in6addr_any,
sizeof(in6addr_any)) == 0)
return (ISC_R_IGNORE);
break;
}
/*
* Get interface flags.
*/
iter->current.flags = 0;
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGIFFLAGS, (char *) &ifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting interface flags: %s",
ifreq.ifr_name, strbuf);
return (ISC_R_IGNORE);
}
if ((ifreq.ifr_flags & IFF_UP) != 0)
iter->current.flags |= INTERFACE_F_UP;
#ifdef IFF_POINTOPOINT
if ((ifreq.ifr_flags & IFF_POINTOPOINT) != 0)
iter->current.flags |= INTERFACE_F_POINTTOPOINT;
#endif
if ((ifreq.ifr_flags & IFF_LOOPBACK) != 0)
iter->current.flags |= INTERFACE_F_LOOPBACK;
if (family == AF_INET)
goto inet;
#if !defined(ISC_PLATFORM_HAVEIF_LADDRREQ) && defined(SIOCGLIFADDR)
memset(&lifreq, 0, sizeof(lifreq));
memmove(lifreq.lifr_name, iter->current.name, sizeof(lifreq.lifr_name));
memmove(&lifreq.lifr_addr, &iter->current.address.type.in6,
sizeof(iter->current.address.type.in6));
if (ioctl(iter->socket, SIOCGLIFADDR, &lifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting interface address: %s",
ifreq.ifr_name, strbuf);
return (ISC_R_IGNORE);
}
prefixlen = lifreq.lifr_addrlen;
#else
isc_netaddr_format(&iter->current.address, sabuf, sizeof(sabuf));
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_INTERFACE,
ISC_LOG_INFO,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETIFCONFIG,
"prefix length for %s is unknown "
"(assume 128)"), sabuf);
prefixlen = 128;
#endif
/*
* Netmask already zeroed.
*/
iter->current.netmask.family = family;
for (i = 0; i < 16; i++) {
if (prefixlen > 8) {
bits = 0;
prefixlen -= 8;
} else {
bits = 8 - prefixlen;
prefixlen = 0;
}
iter->current.netmask.type.in6.s6_addr[i] =
(~0U << bits) & 0xff;
}
return (ISC_R_SUCCESS);
inet:
if (family != AF_INET)
return (ISC_R_IGNORE);
#ifdef IFF_POINTOPOINT
/*
* If the interface is point-to-point, get the destination address.
*/
if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGIFDSTADDR, (char *)&ifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETDESTADDR,
"%s: getting "
"destination address: %s"),
ifreq.ifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.dstaddress,
(struct sockaddr *)&ifreq.ifr_dstaddr, ifreq.ifr_name);
}
#endif
/*
* Get the network mask.
*/
memset(&ifreq, 0, sizeof(ifreq));
memmove(&ifreq, ifrp, sizeof(ifreq));
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGIFNETMASK, (char *)&ifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETNETMASK,
"%s: getting netmask: %s"),
ifreq.ifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.netmask,
(struct sockaddr *)&ifreq.ifr_addr, ifreq.ifr_name);
return (ISC_R_SUCCESS);
}
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
static isc_result_t
internal_current6(isc_interfaceiter_t *iter) {
struct LIFREQ *ifrp;
struct LIFREQ lifreq;
int family;
char strbuf[ISC_STRERRORSIZE];
int fd;
REQUIRE(VALID_IFITER(iter));
if (iter->result6 != ISC_R_SUCCESS)
return (iter->result6);
REQUIRE(iter->pos6 < (unsigned int) iter->lifc.lifc_len);
ifrp = (struct LIFREQ *)((char *) iter->lifc.lifc_req + iter->pos6);
memset(&lifreq, 0, sizeof(lifreq));
memmove(&lifreq, ifrp, sizeof(lifreq));
family = lifreq.lifr_addr.ss_family;
if (family != AF_INET && family != AF_INET6)
return (ISC_R_IGNORE);
memset(&iter->current, 0, sizeof(iter->current));
iter->current.af = family;
INSIST(sizeof(lifreq.lifr_name) <= sizeof(iter->current.name));
memset(iter->current.name, 0, sizeof(iter->current.name));
memmove(iter->current.name, lifreq.lifr_name, sizeof(lifreq.lifr_name));
get_addr(family, &iter->current.address,
(struct sockaddr *)&lifreq.lifr_addr, lifreq.lifr_name);
/*
* If the interface does not have a address ignore it.
*/
switch (family) {
case AF_INET:
if (iter->current.address.type.in.s_addr == htonl(INADDR_ANY))
return (ISC_R_IGNORE);
break;
case AF_INET6:
if (memcmp(&iter->current.address.type.in6, &in6addr_any,
sizeof(in6addr_any)) == 0)
return (ISC_R_IGNORE);
break;
}
/*
* Get interface flags.
*/
iter->current.flags = 0;
if (family == AF_INET6)
fd = iter->socket6;
else
fd = iter->socket;
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(fd, SIOCGLIFFLAGS, (char *) &lifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting interface flags: %s",
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
if ((lifreq.lifr_flags & IFF_UP) != 0)
iter->current.flags |= INTERFACE_F_UP;
#ifdef IFF_POINTOPOINT
if ((lifreq.lifr_flags & IFF_POINTOPOINT) != 0)
iter->current.flags |= INTERFACE_F_POINTTOPOINT;
#endif
if ((lifreq.lifr_flags & IFF_LOOPBACK) != 0)
iter->current.flags |= INTERFACE_F_LOOPBACK;
#ifdef IFF_POINTOPOINT
/*
* If the interface is point-to-point, get the destination address.
*/
if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(fd, SIOCGLIFDSTADDR, (char *)&lifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETDESTADDR,
"%s: getting "
"destination address: %s"),
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.dstaddress,
(struct sockaddr *)&lifreq.lifr_dstaddr,
lifreq.lifr_name);
}
#endif
/*
* Get the network mask. Netmask already zeroed.
*/
memset(&lifreq, 0, sizeof(lifreq));
memmove(&lifreq, ifrp, sizeof(lifreq));
#ifdef lifr_addrlen
/*
* Special case: if the system provides lifr_addrlen member, the
* netmask of an IPv6 address can be derived from the length, since
* an IPv6 address always has a contiguous mask.
*/
if (family == AF_INET6) {
int i, bits;
iter->current.netmask.family = family;
for (i = 0; i < lifreq.lifr_addrlen; i += 8) {
bits = lifreq.lifr_addrlen - i;
bits = (bits < 8) ? (8 - bits) : 0;
iter->current.netmask.type.in6.s6_addr[i / 8] =
(~0U << bits) & 0xff;
}
return (ISC_R_SUCCESS);
}
#endif
/*
* Ignore the HP/UX warning about "integer overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(fd, SIOCGLIFNETMASK, (char *)&lifreq) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETNETMASK,
"%s: getting netmask: %s"),
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.netmask,
(struct sockaddr *)&lifreq.lifr_addr, lifreq.lifr_name);
return (ISC_R_SUCCESS);
}
#endif
static isc_result_t
internal_current(isc_interfaceiter_t *iter) {
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
if (iter->mode == 6) {
iter->result6 = internal_current6(iter);
if (iter->result6 != ISC_R_NOMORE)
return (iter->result6);
}
#endif
return (internal_current4(iter));
}
/*
* Step the iterator to the next interface. Unlike
* isc_interfaceiter_next(), this may leave the iterator
* positioned on an interface that will ultimately
* be ignored. Return ISC_R_NOMORE if there are no more
* interfaces, otherwise ISC_R_SUCCESS.
*/
static isc_result_t
internal_next4(isc_interfaceiter_t *iter) {
if (iter->pos < (unsigned int) iter->ifc.ifc_len) {
iter->pos += sizeof(struct ifreq);
} else {
INSIST(iter->pos == (unsigned int) iter->ifc.ifc_len);
#ifdef __linux
return (linux_if_inet6_next(iter));
#else
return (ISC_R_NOMORE);
#endif
}
return (ISC_R_SUCCESS);
}
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
static isc_result_t
internal_next6(isc_interfaceiter_t *iter) {
if (iter->result6 != ISC_R_SUCCESS && iter->result6 != ISC_R_IGNORE)
return (iter->result6);
REQUIRE(iter->pos6 < (unsigned int) iter->lifc.lifc_len);
iter->pos6 += sizeof(struct LIFREQ);
if (iter->pos6 >= (unsigned int) iter->lifc.lifc_len)
return (ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
#endif
static isc_result_t
internal_next(isc_interfaceiter_t *iter) {
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
if (iter->mode == 6) {
iter->result6 = internal_next6(iter);
if (iter->result6 != ISC_R_NOMORE)
return (iter->result6);
if (iter->first6) {
iter->first6 = false;
return (ISC_R_SUCCESS);
}
}
#endif
return (internal_next4(iter));
}
static void
internal_destroy(isc_interfaceiter_t *iter) {
(void) close(iter->socket);
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
if (iter->socket6 != -1)
(void) close(iter->socket6);
if (iter->buf6 != NULL) {
isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
}
#endif
#ifdef __linux
if (iter->proc != NULL)
fclose(iter->proc);
#endif
}
static
void internal_first(isc_interfaceiter_t *iter) {
iter->pos = 0;
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
iter->pos6 = 0;
if (iter->result6 == ISC_R_NOMORE)
iter->result6 = ISC_R_SUCCESS;
iter->first6 = true;
#endif
#ifdef __linux
linux_if_inet6_first(iter);
#endif
}

281
lib/isc/unix/ifiter_sysctl.c
View File

@@ -1,281 +0,0 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <config.h>
/*! \file
* \brief
* Obtain the list of network interfaces using sysctl.
* See TCP/IP Illustrated Volume 2, sections 19.8, 19.14,
* and 19.16.
*/
#include <inttypes.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <isc/print.h>
/* XXX what about Alpha? */
#define ROUNDUP(a) ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) \
: sizeof(long))
#define IFITER_MAGIC ISC_MAGIC('I', 'F', 'I', 'S')
#define VALID_IFITER(t) ISC_MAGIC_VALID(t, IFITER_MAGIC)
struct isc_interfaceiter {
unsigned int magic; /* Magic number. */
isc_mem_t *mctx;
void *buf; /* Buffer for sysctl data. */
unsigned int bufsize; /* Bytes allocated. */
unsigned int bufused; /* Bytes used. */
unsigned int pos; /* Current offset in
sysctl data. */
isc_interface_t current; /* Current interface data. */
isc_result_t result; /* Last result code. */
};
static int mib[6] = {
CTL_NET,
PF_ROUTE,
0,
0, /* Any address family. */
NET_RT_IFLIST,
0 /* Flags. */
};
isc_result_t
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp) {
isc_interfaceiter_t *iter;
isc_result_t result;
size_t bufsize;
size_t bufused;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(mctx != NULL);
REQUIRE(iterp != NULL);
REQUIRE(*iterp == NULL);
iter = isc_mem_get(mctx, sizeof(*iter));
if (iter == NULL)
return (ISC_R_NOMEMORY);
iter->mctx = mctx;
iter->buf = 0;
/*
* Determine the amount of memory needed.
*/
bufsize = 0;
if (sysctl(mib, 6, NULL, &bufsize, NULL, (size_t) 0) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERSYSCTL,
ISC_MSG_GETIFLISTSIZE,
"getting interface "
"list size: sysctl: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto failure;
}
iter->bufsize = bufsize;
iter->buf = isc_mem_get(iter->mctx, iter->bufsize);
if (iter->buf == NULL) {
result = ISC_R_NOMEMORY;
goto failure;
}
bufused = bufsize;
if (sysctl(mib, 6, iter->buf, &bufused, NULL, (size_t) 0) < 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERSYSCTL,
ISC_MSG_GETIFLIST,
"getting interface list: "
"sysctl: %s"),
strbuf);
result = ISC_R_UNEXPECTED;
goto failure;
}
iter->bufused = bufused;
INSIST(iter->bufused <= iter->bufsize);
/*
* A newly created iterator has an undefined position
* until isc_interfaceiter_first() is called.
*/
iter->pos = (unsigned int) -1;
iter->result = ISC_R_FAILURE;
iter->magic = IFITER_MAGIC;
*iterp = iter;
return (ISC_R_SUCCESS);
failure:
if (iter->buf != NULL)
isc_mem_put(mctx, iter->buf, iter->bufsize);
isc_mem_put(mctx, iter, sizeof(*iter));
return (result);
}
/*
* Get information about the current interface to iter->current.
* If successful, return ISC_R_SUCCESS.
* If the interface has an unsupported address family,
* return ISC_R_IGNORE. In case of other failure,
* return ISC_R_UNEXPECTED.
*/
static isc_result_t
internal_current(isc_interfaceiter_t *iter) {
struct ifa_msghdr *ifam, *ifam_end;
REQUIRE(VALID_IFITER(iter));
REQUIRE (iter->pos < (unsigned int) iter->bufused);
ifam = (struct ifa_msghdr *) ((char *) iter->buf + iter->pos);
ifam_end = (struct ifa_msghdr *) ((char *) iter->buf + iter->bufused);
if (ifam->ifam_type == RTM_IFINFO) {
struct if_msghdr *ifm = (struct if_msghdr *) ifam;
struct sockaddr_dl *sdl = (struct sockaddr_dl *) (ifm + 1);
unsigned int namelen;
memset(&iter->current, 0, sizeof(iter->current));
namelen = sdl->sdl_nlen;
if (namelen > sizeof(iter->current.name) - 1)
namelen = sizeof(iter->current.name) - 1;
memset(iter->current.name, 0, sizeof(iter->current.name));
memmove(iter->current.name, sdl->sdl_data, namelen);
iter->current.flags = 0;
if ((ifam->ifam_flags & IFF_UP) != 0)
iter->current.flags |= INTERFACE_F_UP;
if ((ifam->ifam_flags & IFF_POINTOPOINT) != 0)
iter->current.flags |= INTERFACE_F_POINTTOPOINT;
if ((ifam->ifam_flags & IFF_LOOPBACK) != 0)
iter->current.flags |= INTERFACE_F_LOOPBACK;
/*
* This is not an interface address.
* Force another iteration.
*/
return (ISC_R_IGNORE);
} else if (ifam->ifam_type == RTM_NEWADDR) {
int i;
int family;
struct sockaddr *mask_sa = NULL;
struct sockaddr *addr_sa = NULL;
struct sockaddr *dst_sa = NULL;
struct sockaddr *sa = (struct sockaddr *)(ifam + 1);
family = sa->sa_family;
for (i = 0; i < RTAX_MAX; i++)
{
if ((ifam->ifam_addrs & (1 << i)) == 0)
continue;
INSIST(sa < (struct sockaddr *) ifam_end);
switch (i) {
case RTAX_NETMASK: /* Netmask */
mask_sa = sa;
break;
case RTAX_IFA: /* Interface address */
addr_sa = sa;
break;
case RTAX_BRD: /* Broadcast or destination address */
dst_sa = sa;
break;
}
sa = (struct sockaddr *)((char*)(sa)
+ ROUNDUP(sizeof(struct sockaddr)));
}
if (addr_sa == NULL)
return (ISC_R_IGNORE);
family = addr_sa->sa_family;
if (family != AF_INET && family != AF_INET6)
return (ISC_R_IGNORE);
iter->current.af = family;
get_addr(family, &iter->current.address, addr_sa,
iter->current.name);
if (mask_sa != NULL)
get_addr(family, &iter->current.netmask, mask_sa,
iter->current.name);
if (dst_sa != NULL &&
(iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0)
get_addr(family, &iter->current.dstaddress, dst_sa,
iter->current.name);
return (ISC_R_SUCCESS);
} else {
printf("%s",
isc_msgcat_get(isc_msgcat, ISC_MSGSET_IFITERSYSCTL,
ISC_MSG_UNEXPECTEDTYPE,
"warning: unexpected interface list "
"message type\n"));
return (ISC_R_IGNORE);
}
}
/*
* Step the iterator to the next interface. Unlike
* isc_interfaceiter_next(), this may leave the iterator
* positioned on an interface that will ultimately
* be ignored. Return ISC_R_NOMORE if there are no more
* interfaces, otherwise ISC_R_SUCCESS.
*/
static isc_result_t
internal_next(isc_interfaceiter_t *iter) {
struct ifa_msghdr *ifam;
REQUIRE (iter->pos < (unsigned int) iter->bufused);
ifam = (struct ifa_msghdr *) ((char *) iter->buf + iter->pos);
iter->pos += ifam->ifam_msglen;
if (iter->pos >= iter->bufused)
return (ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
static void
internal_destroy(isc_interfaceiter_t *iter) {
UNUSED(iter); /* Unused. */
/*
* Do nothing.
*/
}
static
void internal_first(isc_interfaceiter_t *iter) {
iter->pos = 0;
}

6
lib/isc/unix/interfaceiter.c
View File

@@ -144,13 +144,7 @@ static isc_result_t linux_if_inet6_current(isc_interfaceiter_t *);
static void linux_if_inet6_first(isc_interfaceiter_t *iter);
#endif
#if HAVE_GETIFADDRS
#include "ifiter_getifaddrs.c"
#elif HAVE_IFLIST_SYSCTL
#include "ifiter_sysctl.c"
#else
#include "ifiter_ioctl.c"
#endif
#ifdef __linux
static void