/* * Copyright (C) 1999-2001 Internet Software Consortium. * * 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 INTERNET SOFTWARE CONSORTIUM * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL * INTERNET SOFTWARE CONSORTIUM 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: ifiter_ioctl.c,v 1.34 2002/08/16 00:05:57 marka Exp $ */ /* * 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 socket; int mode; struct ifconf ifc; #if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) struct LIFCONF lifc; #endif void *buf; /* Buffer for sysctl data. */ unsigned int bufsize; /* Bytes allocated. */ #ifdef HAVE_TRUCLUSTER int clua_context; /* Cluster alias context */ #endif unsigned int pos; /* Current offset in SIOCGLIFCONF data */ isc_interface_t current; /* Current interface data. */ isc_result_t result; /* Last result code. */ }; #ifdef HAVE_TRUCLUSTER #include #include #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 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; } iter->mode = 4; return (ISC_R_SUCCESS); unexpected: isc_mem_put(iter->mctx, iter->buf, iter->bufsize); iter->buf = NULL; return (ISC_R_UNEXPECTED); } static isc_result_t getbuf6(isc_interfaceiter_t *iter) { #if !defined(SIOCGLIFCONF) || !defined(SIOCGLIFADDR) UNUSED(iter); return (ISC_R_NOTIMPLEMENTED); #else char strbuf[ISC_STRERRORSIZE]; isc_result_t result; 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->lifc.lifc_len, 0, sizeof(iter->lifc.lifc_len)); #ifdef ISC_HAVE_LIFC_FAMILY iter->lifc.lifc_family = AF_UNSPEC; #endif #ifdef ISC_HAVE_LIFC_FLAGS iter->lifc.lifc_flags = 0; #endif iter->lifc.lifc_len = iter->bufsize; iter->lifc.lifc_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, 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)); UNEXPECTED_ERROR(__FILE__, __LINE__, 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->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")); result = ISC_R_UNEXPECTED; goto cleanup; } isc_mem_put(iter->mctx, iter->buf, iter->bufsize); iter->bufsize *= 2; } iter->mode = 6; return (ISC_R_SUCCESS); cleanup: isc_mem_put(iter->mctx, iter->buf, iter->bufsize); iter->buf = 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(iterp != NULL); REQUIRE(*iterp == NULL); iter = isc_mem_get(mctx, sizeof(*iter)); if (iter == NULL) return (ISC_R_NOMEMORY); iter->mctx = mctx; iter->buf = NULL; iter->mode = 0; /* * Create an unbound datagram socket to do the SIOCGLIFADDR ioctl on. */ 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; } /* * Get the interface configuration, allocating more memory if * necessary. */ result = isc_net_probeipv6(); if (result == ISC_R_SUCCESS) result = getbuf6(iter); if (result != ISC_R_SUCCESS) 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; #endif iter->pos = (unsigned int) -1; 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: 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 sockaddr sa; struct clua_info ci; while (clua_getaliasaddress(&sa, &iter->clua_context) == CLUA_SUCCESS) { if (clua_getaliasinfo(&sa, &ci) != CLUA_SUCCESS) continue; memset(&iter->current, 0, sizeof(iter->current)); iter->current.af = 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); } return (ISC_R_NOMORE); } #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(SIOCGLIFCONF) && defined(SIOCGLIFADDR) struct if_laddrreq if_laddrreq; int i, bits; #endif REQUIRE(VALID_IFITER(iter)); REQUIRE (iter->pos < (unsigned int) iter->ifc.ifc_len); ifrp = (struct ifreq *)((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 (SIOCGLIFCONF) && defined(SIOCGLIFADDR) && \ 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)); /* Some older O/S's don't have the interface index. Since ifr_index is * usually a macro definition into the actual structure we * use that to determine if we should get it. */ #ifdef ifr_index iter->current.ifindex = ifreq.ifr_index; /* Save the if index */ #else iter->current.ifindex = 0; #endif get_addr(family, &iter->current.address, (struct sockaddr *)&ifrp->ifr_addr); /* * 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; if ((ifreq.ifr_flags & IFF_POINTOPOINT) != 0) iter->current.flags |= INTERFACE_F_POINTTOPOINT; 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 !defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) if (family == AF_INET) goto inet; memset(&if_laddrreq, 0, sizeof(if_laddrreq)); memcpy(if_laddrreq.iflr_name, iter->current.name, sizeof(if_laddrreq.iflr_name)); memcpy(&if_laddrreq.addr, &iter->current.address.type.in6, sizeof(iter->current.address.type.in6)); if (ioctl(iter->socket, SIOCGLIFADDR, &if_laddrreq) < 0) { isc__strerror(errno, strbuf, sizeof(strbuf)); UNEXPECTED_ERROR(__FILE__, __LINE__, "%s: getting interface address: %s", ifreq.ifr_name, strbuf); return (ISC_R_IGNORE); } /* * Netmask already zeroed. */ iter->current.netmask.family = family; for (i = 0; i < 16; i++) { if (if_laddrreq.prefixlen > 8) { bits = 0; if_laddrreq.prefixlen -= 8; } else { bits = 8 - if_laddrreq.prefixlen; if_laddrreq.prefixlen = 0; } iter->current.netmask.type.in6.s6_addr[i] = (~0 << bits) & 0xff; } return (ISC_R_SUCCESS); inet: #endif if (family != AF_INET) return (ISC_R_IGNORE); /* * 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); } 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 (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_GETDESTADDR, "%s: getting " "broadcast address: %s"), ifreq.ifr_name, strbuf); return (ISC_R_IGNORE); } get_addr(family, &iter->current.broadcast, (struct sockaddr *)&ifreq.ifr_broadaddr); } /* * 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 (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); return (ISC_R_SUCCESS); } static isc_result_t internal_current6(isc_interfaceiter_t *iter) { #if !defined(SIOCGLIFCONF) || !defined(SIOCGLIFADDR) UNUSED(iter); return (ISC_R_NOTIMPLEMENTED); #else struct LIFREQ *ifrp; struct LIFREQ lifreq; int family; char strbuf[ISC_STRERRORSIZE]; REQUIRE(VALID_IFITER(iter)); REQUIRE (iter->pos < (unsigned int) iter->lifc.lifc_len); ifrp = (struct LIFREQ *)((char *) iter->lifc.lifc_req + iter->pos); 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)); iter->current.ifindex = lifreq.lifr_index; /* Save the if index */ get_addr(family, &iter->current.address, (struct sockaddr *)&lifreq.lifr_addr); #ifdef ISC_PLATFORM_HAVEIPV6 iter->current.scopeid = get_scopeid(family, (struct sockaddr *)&lifreq.lifr_addr); #endif /* * 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, SIOCGLIFFLAGS, (char *) &lifreq) < 0) { /* * XXX This should be looked at further since it looks strange. * If we get an ENXIO then we ignore the error and not worry * about the flags. */ if (errno != ENXIO) { 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; if ((lifreq.lifr_flags & IFF_POINTOPOINT) != 0) iter->current.flags |= INTERFACE_F_POINTTOPOINT; 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 /* * 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 "interger overflow during * conversion. It comes from its own macro definition, * and is really hard to shut up. */ if (ioctl(iter->socket, 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); } #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 (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_GETDESTADDR, "%s: getting " "broadcast address: %s"), lifreq.lifr_name, strbuf); return (ISC_R_IGNORE); } get_addr(family, &iter->current.broadcast, (struct sockaddr *)&lifreq.lifr_broadaddr); } #endif /* SIOCGLIFBRDADDR */ /* * Get the network mask. */ memset(&lifreq, 0, sizeof(lifreq)); memcpy(&lifreq, ifrp, sizeof(lifreq)); switch (family) { case AF_INET: /* * 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, 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); break; case AF_INET6: { #ifdef lifr_addrlen int i, bits; /* * Netmask already zeroed. */ 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; } #endif break; } } return (ISC_R_SUCCESS); #endif } static isc_result_t internal_current(isc_interfaceiter_t *iter) { if (iter->mode == 6) return (internal_current6(iter)); 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) { struct ifreq *ifrp; REQUIRE (iter->pos < (unsigned int) iter->ifc.ifc_len); #ifdef HAVE_TRUCLUSTER if (internal_current_clusteralias(iter) == ISC_R_SUCCESS) return (ISC_R_SUCCESS); #endif ifrp = (struct ifreq *)((char *) iter->ifc.ifc_req + iter->pos); #ifdef ISC_PLATFORM_HAVESALEN 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(*ifrp); if (iter->pos >= (unsigned int) iter->ifc.ifc_len) return (ISC_R_NOMORE); return (ISC_R_SUCCESS); } static isc_result_t internal_next6(isc_interfaceiter_t *iter) { #if !defined(SIOCGLIFCONF) || !defined(SIOCGLIFADDR) UNUSED(iter); return (ISC_R_NOTIMPLEMENTED); #else struct LIFREQ *ifrp; REQUIRE (iter->pos < (unsigned int) iter->lifc.lifc_len); ifrp = (struct LIFREQ *)((char *) iter->lifc.lifc_req + iter->pos); #ifdef ISC_PLATFORM_HAVESALEN if (ifrp->lifr_addr.sa_len > sizeof(struct sockaddr)) iter->pos += sizeof(ifrp->lifr_name) + ifrp->lifr_addr.sa_len; else #endif iter->pos += sizeof(*ifrp); if (iter->pos >= (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 (iter->mode == 6) return (internal_next6(iter)); return (internal_next4(iter)); } static void internal_destroy(isc_interfaceiter_t *iter) { (void) close(iter->socket); }