/* $NetBSD: ifiter_ioctl.c,v 1.6 2018/09/29 21:52:32 christos Exp $ */
/*
* Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
/* Id */
/*! \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_broadaddr iflr_broadaddr
#define lifr_flags iflr_flags
#define lifr_index iflr_index
#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. */
isc_boolean_t first6;
#endif
#ifdef HAVE_TRUCLUSTER
int clua_context; /* Cluster alias context */
isc_boolean_t clua_done;
struct sockaddr clua_sa;
#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. */
};
#ifdef HAVE_TRUCLUSTER
#include <clua/clua.h>
#include <sys/socket.h>
#endif
/*%
* 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
/* Silence a warning when this file is #included */
int
isc_ioctl(int fildes, int req, char *arg);
int
isc_ioctl(int fildes, int req, char *arg) {
int trys;
int ret;
for (trys = 0; trys < 3; trys++) {
if ((ret = ioctl(fildes, req, arg)) < 0) {
if (errno == EINTR)
continue;
}
break;
}
return (ret);
}
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 (isc_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 (isc_ioctl(iter->socket6, SIOCGLIFCONF, (char *)&iter->lifc)
== -1) {
#ifdef __hpux
/*
* IPv6 interface scanning is not available on all
* kernels w/ IPv6 sockets.
*/
if (errno == ENOENT) {
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_INTERFACE,
ISC_LOG_DEBUG(1),
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETIFCONFIG,
"get interface "
"configuration: %s"),
strbuf);
result = ISC_R_FAILURE;
goto cleanup;
}
#endif
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 = ISC_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 HAVE_TRUCLUSTER
iter->clua_context = -1;
iter->clua_done = ISC_TRUE;
#endif
#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);
}
#ifdef HAVE_TRUCLUSTER
static void
get_inaddr(isc_netaddr_t *dst, struct in_addr *src) {
dst->family = AF_INET;
memcpy(&dst->type.in, src, sizeof(struct in_addr));
}
static isc_result_t
internal_current_clusteralias(isc_interfaceiter_t *iter) {
struct clua_info ci;
if (clua_getaliasinfo(&iter->clua_sa, &ci) != CLUA_SUCCESS)
return (ISC_R_IGNORE);
memset(&iter->current, 0, sizeof(iter->current));
iter->current.af = iter->clua_sa.sa_family;
memset(iter->current.name, 0, sizeof(iter->current.name));
sprintf(iter->current.name, "clua%d", ci.aliasid);
iter->current.flags = INTERFACE_F_UP;
get_inaddr(&iter->current.address, &ci.addr);
get_inaddr(&iter->current.netmask, &ci.netmask);
return (ISC_R_SUCCESS);
}
#endif
/*
* 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 = (void *)((char *) iter->ifc.ifc_req + iter->pos);
memset(&ifreq, 0, sizeof(ifreq));
memcpy(&ifreq, ifrp, sizeof(ifreq));
family = ifreq.ifr_addr.sa_family;
#if defined(ISC_PLATFORM_HAVEIPV6)
if (family != AF_INET && family != AF_INET6)
#else
if (family != AF_INET)
#endif
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));
memcpy(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 (isc_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 ((ifreq.ifr_flags & IFF_BROADCAST) != 0)
iter->current.flags |= INTERFACE_F_BROADCAST;
#ifdef IFF_MULTICAST
if ((ifreq.ifr_flags & IFF_MULTICAST) != 0)
iter->current.flags |= INTERFACE_F_MULTICAST;
#endif
if (family == AF_INET)
goto inet;
#if !defined(ISC_PLATFORM_HAVEIF_LADDRREQ) && defined(SIOCGLIFADDR)
memset(&lifreq, 0, sizeof(lifreq));
memcpy(lifreq.lifr_name, iter->current.name, sizeof(lifreq.lifr_name));
memcpy(&lifreq.lifr_addr, &iter->current.address.type.in6,
sizeof(iter->current.address.type.in6));
if (isc_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] = (~0 << bits) & 0xff;
}
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
iter->current.ifindex = if_nametoindex(iter->current.name);
#endif
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 (isc_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
if ((iter->current.flags & INTERFACE_F_BROADCAST) != 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 (isc_ioctl(iter->socket, SIOCGIFBRDADDR, (char *)&ifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETBCSTADDR,
"%s: getting "
"broadcast address: %s"),
ifreq.ifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.broadcast,
(struct sockaddr *)&ifreq.ifr_broadaddr, ifreq.ifr_name);
}
/*
* Get the network mask.
*/
memset(&ifreq, 0, sizeof(ifreq));
memcpy(&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 (isc_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);
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
iter->current.ifindex = if_nametoindex(iter->current.name);
#endif
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 = (void *)((char *)iter->lifc.lifc_req + iter->pos6);
memset(&lifreq, 0, sizeof(lifreq));
memcpy(&lifreq, ifrp, sizeof(lifreq));
family = lifreq.lifr_addr.ss_family;
#ifdef ISC_PLATFORM_HAVEIPV6
if (family != AF_INET && family != AF_INET6)
#else
if (family != AF_INET)
#endif
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));
memcpy(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 (isc_netaddr_islinklocal(&iter->current.address))
isc_netaddr_setzone(&iter->current.address,
(isc_uint32_t)lifreq.lifr_index);
/*
* 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 (isc_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;
if ((lifreq.lifr_flags & IFF_BROADCAST) != 0) {
iter->current.flags |= INTERFACE_F_BROADCAST;
}
#ifdef IFF_MULTICAST
if ((lifreq.lifr_flags & IFF_MULTICAST) != 0) {
iter->current.flags |= INTERFACE_F_MULTICAST;
}
#endif
#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 (isc_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
#ifdef SIOCGLIFBRDADDR
if ((iter->current.flags & INTERFACE_F_BROADCAST) != 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 (isc_ioctl(iter->socket, SIOCGLIFBRDADDR, (char *)&lifreq)
< 0) {
isc__strerror(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
isc_msgcat_get(isc_msgcat,
ISC_MSGSET_IFITERIOCTL,
ISC_MSG_GETBCSTADDR,
"%s: getting "
"broadcast address: %s"),
lifreq.lifr_name, strbuf);
return (ISC_R_IGNORE);
}
get_addr(family, &iter->current.broadcast,
(struct sockaddr *)&lifreq.lifr_broadaddr,
lifreq.lifr_name);
}
#endif /* SIOCGLIFBRDADDR */
/*
* Get the network mask. Netmask already zeroed.
*/
memset(&lifreq, 0, sizeof(lifreq));
memcpy(&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] =
(~0 << bits) & 0xff;
}
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
iter->current.ifindex = if_nametoindex(iter->current.name);
#endif
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 (isc_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);
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
iter->current.ifindex = if_nametoindex(iter->current.name);
#endif
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
#ifdef HAVE_TRUCLUSTER
if (!iter->clua_done)
return(internal_current_clusteralias(iter));
#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) {
#ifdef ISC_PLATFORM_HAVESALEN
struct ifreq *ifrp;
#endif
if (iter->pos < (unsigned int) iter->ifc.ifc_len) {
#ifdef ISC_PLATFORM_HAVESALEN
ifrp = (struct ifreq *)((char *) iter->ifc.ifc_req + iter->pos);
if (ifrp->ifr_addr.sa_len > sizeof(struct sockaddr))
iter->pos += sizeof(ifrp->ifr_name) +
ifrp->ifr_addr.sa_len;
else
#endif
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) {
#ifdef ISC_PLATFORM_HAVESALEN
struct LIFREQ *ifrp;
#endif
if (iter->result6 != ISC_R_SUCCESS && iter->result6 != ISC_R_IGNORE)
return (iter->result6);
REQUIRE(iter->pos6 < (unsigned int) iter->lifc.lifc_len);
#ifdef ISC_PLATFORM_HAVESALEN
ifrp = (struct LIFREQ *)((char *) iter->lifc.lifc_req + iter->pos6);
if (ifrp->lifr_addr.sa_len > sizeof(struct sockaddr))
iter->pos6 += sizeof(ifrp->lifr_name) + ifrp->lifr_addr.sa_len;
else
#endif
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) {
#ifdef HAVE_TRUCLUSTER
int clua_result;
#endif
#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 = ISC_FALSE;
return (ISC_R_SUCCESS);
}
}
#endif
#ifdef HAVE_TRUCLUSTER
if (!iter->clua_done) {
clua_result = clua_getaliasaddress(&iter->clua_sa,
&iter->clua_context);
if (clua_result != CLUA_SUCCESS)
iter->clua_done = ISC_TRUE;
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) {
#ifdef HAVE_TRUCLUSTER
int clua_result;
#endif
iter->pos = 0;
#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR)
iter->pos6 = 0;
if (iter->result6 == ISC_R_NOMORE)
iter->result6 = ISC_R_SUCCESS;
iter->first6 = ISC_TRUE;
#endif
#ifdef HAVE_TRUCLUSTER
iter->clua_context = 0;
clua_result = clua_getaliasaddress(&iter->clua_sa,
&iter->clua_context);
iter->clua_done = ISC_TF(clua_result != CLUA_SUCCESS);
#endif
#ifdef __linux
linux_if_inet6_first(iter);
#endif
}