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-rw-r--r--lib/isc/unix/ifiter_ioctl.c931
1 files changed, 931 insertions, 0 deletions
diff --git a/lib/isc/unix/ifiter_ioctl.c b/lib/isc/unix/ifiter_ioctl.c
new file mode 100644
index 0000000..9702fae
--- /dev/null
+++ b/lib/isc/unix/ifiter_ioctl.c
@@ -0,0 +1,931 @@
+/*
+ * 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 HAVE_TRUCLUSTER
+ int clua_context; /* Cluster alias context */
+ bool 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
+
+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) {
+#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 = 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 = 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;
+ memmove(&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));
+ snprintf(iter->current.name, sizeof(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 = (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 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));
+ 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;
+#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));
+ 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
+#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 = 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 = 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 = true;
+#endif
+#ifdef HAVE_TRUCLUSTER
+ iter->clua_context = 0;
+ clua_result = clua_getaliasaddress(&iter->clua_sa,
+ &iter->clua_context);
+ iter->clua_done = (clua_result != CLUA_SUCCESS);
+#endif
+#ifdef __linux
+ linux_if_inet6_first(iter);
+#endif
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 19:58:02 +0000