diff options
Diffstat (limited to 'contrib/ntp/libisc/ifiter_ioctl.c')
| -rw-r--r-- | contrib/ntp/libisc/ifiter_ioctl.c | 820 |
1 files changed, 820 insertions, 0 deletions
diff --git a/contrib/ntp/libisc/ifiter_ioctl.c b/contrib/ntp/libisc/ifiter_ioctl.c new file mode 100644 index 0000000..bf731e7 --- /dev/null +++ b/contrib/ntp/libisc/ifiter_ioctl.c @@ -0,0 +1,820 @@ +/* + * 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 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 <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 + +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)); + + 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)); + + get_addr(family, &iter->current.address, + (struct sockaddr *)&lifreq.lifr_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, 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; + + /* + * Note that IPv6 broadcast does not exist + * so don't check for IPv6 broadcast flag + */ + +#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); + } + + + /* + * 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); +} |
