static isc_result_t
linux_if_inet6_current(isc_interfaceiter_t *iter) {
char address[33];
char name[IF_NAMESIZE+1];
struct in6_addr addr6;
int ifindex, prefix, flag3, flag4;
int res;
unsigned int i;
if (iter->valid != ISC_R_SUCCESS)
return (iter->valid);
if (iter->proc == NULL) {
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_INTERFACE, ISC_LOG_ERROR,
"/proc/net/if_inet6:iter->proc == NULL");
return (ISC_R_FAILURE);
}
res = sscanf(iter->entry, "%32[a-f0-9] %x %x %x %x %16s\n",
address, &ifindex, &prefix, &flag3, &flag4, name);
if (res != 6) {
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_INTERFACE, ISC_LOG_ERROR,
"/proc/net/if_inet6:sscanf() -> %d (expected 6)",
res);
return (ISC_R_FAILURE);
}
if (strlen(address) != 32) {
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_INTERFACE, ISC_LOG_ERROR,
"/proc/net/if_inet6:strlen(%s) != 32", address);
return (ISC_R_FAILURE);
}
for (i = 0; i < 16; i++) {
unsigned char byte;
static const char hex[] = "0123456789abcdef";
byte = ((strchr(hex, address[i * 2]) - hex) << 4) |
(strchr(hex, address[i * 2 + 1]) - hex);
addr6.s6_addr[i] = byte;
}
iter->current.af = AF_INET6;
iter->current.flags = INTERFACE_F_UP;
isc_netaddr_fromin6(&iter->current.address, &addr6);
if (isc_netaddr_islinklocal(&iter->current.address)) {
isc_netaddr_setzone(&iter->current.address,
(isc_uint32_t)ifindex);
}
for (i = 0; i < 16; i++) {
if (prefix > 8) {
addr6.s6_addr[i] = 0xff;
prefix -= 8;
} else {
addr6.s6_addr[i] = (0xff << (8 - prefix)) & 0xff;
prefix = 0;
}
}
isc_netaddr_fromin6(&iter->current.netmask, &addr6);
strncpy(iter->current.name, name, sizeof(iter->current.name));
return (ISC_R_SUCCESS);
}
static isc_result_t
do_scan(ns_interfacemgr_t *mgr, ns_listenlist_t *ext_listen,
isc_boolean_t verbose)
{
isc_interfaceiter_t *iter = NULL;
isc_boolean_t scan_ipv4 = ISC_FALSE;
isc_boolean_t scan_ipv6 = ISC_FALSE;
isc_boolean_t adjusting = ISC_FALSE;
isc_boolean_t ipv6only = ISC_TRUE;
isc_boolean_t ipv6pktinfo = ISC_TRUE;
isc_result_t result;
isc_netaddr_t zero_address, zero_address6;
ns_listenelt_t *le;
isc_sockaddr_t listen_addr;
ns_interface_t *ifp;
isc_boolean_t log_explicit = ISC_FALSE;
isc_boolean_t dolistenon;
if (ext_listen != NULL)
adjusting = ISC_TRUE;
if (isc_net_probeipv6() == ISC_R_SUCCESS)
scan_ipv6 = ISC_TRUE;
#ifdef WANT_IPV6
else
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO : ISC_LOG_DEBUG(1),
"no IPv6 interfaces found");
#endif
if (isc_net_probeipv4() == ISC_R_SUCCESS)
scan_ipv4 = ISC_TRUE;
else
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO : ISC_LOG_DEBUG(1),
"no IPv4 interfaces found");
/*
* A special, but typical case; listen-on-v6 { any; }.
* When we can make the socket IPv6-only, open a single wildcard
* socket for IPv6 communication. Otherwise, make separate socket
* for each IPv6 address in order to avoid accepting IPv4 packets
* as the form of mapped addresses unintentionally unless explicitly
* allowed.
*/
#ifndef ISC_ALLOW_MAPPED
if (scan_ipv6 == ISC_TRUE &&
isc_net_probe_ipv6only() != ISC_R_SUCCESS) {
ipv6only = ISC_FALSE;
log_explicit = ISC_TRUE;
}
#endif
if (scan_ipv6 == ISC_TRUE &&
isc_net_probe_ipv6pktinfo() != ISC_R_SUCCESS) {
ipv6pktinfo = ISC_FALSE;
log_explicit = ISC_TRUE;
}
if (scan_ipv6 == ISC_TRUE && ipv6only && ipv6pktinfo) {
for (le = ISC_LIST_HEAD(mgr->listenon6->elts);
le != NULL;
le = ISC_LIST_NEXT(le, link)) {
struct in6_addr in6a;
if (!listenon_is_ip6_any(le))
continue;
in6a = in6addr_any;
isc_sockaddr_fromin6(&listen_addr, &in6a, le->port);
ifp = find_matching_interface(mgr, &listen_addr);
if (ifp != NULL) {
ifp->generation = mgr->generation;
} else {
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_INFO,
"listening on IPv6 "
"interfaces, port %u",
le->port);
result = ns_interface_setup(mgr, &listen_addr,
"<any>", &ifp,
ISC_TRUE);
if (result == ISC_R_SUCCESS)
ifp->flags |= NS_INTERFACEFLAG_ANYADDR;
else
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"listening on all IPv6 "
"interfaces failed");
/* Continue. */
}
}
}
isc_netaddr_any(&zero_address);
isc_netaddr_any6(&zero_address6);
result = isc_interfaceiter_create(mgr->mctx, &iter);
if (result != ISC_R_SUCCESS)
return (result);
if (adjusting == ISC_FALSE) {
result = clearacl(mgr->mctx, &mgr->aclenv.localhost);
if (result != ISC_R_SUCCESS)
goto cleanup_iter;
result = clearacl(mgr->mctx, &mgr->aclenv.localnets);
if (result != ISC_R_SUCCESS)
goto cleanup_iter;
clearlistenon(mgr);
}
for (result = isc_interfaceiter_first(iter);
result == ISC_R_SUCCESS;
result = isc_interfaceiter_next(iter))
{
isc_interface_t interface;
ns_listenlist_t *ll;
unsigned int family;
result = isc_interfaceiter_current(iter, &interface);
if (result != ISC_R_SUCCESS)
break;
family = interface.address.family;
if (family != AF_INET && family != AF_INET6)
continue;
if (scan_ipv4 == ISC_FALSE && family == AF_INET)
continue;
if (scan_ipv6 == ISC_FALSE && family == AF_INET6)
continue;
/*
* Test for the address being nonzero rather than testing
* INTERFACE_F_UP, because on some systems the latter
* follows the media state and we could end up ignoring
* the interface for an entire rescan interval due to
* a temporary media glitch at rescan time.
*/
if (family == AF_INET &&
isc_netaddr_equal(&interface.address, &zero_address)) {
continue;
}
if (family == AF_INET6 &&
isc_netaddr_equal(&interface.address, &zero_address6)) {
continue;
}
if (adjusting == ISC_FALSE) {
result = setup_locals(mgr, &interface);
if (result != ISC_R_SUCCESS)
goto ignore_interface;
}
ll = (family == AF_INET) ? mgr->listenon4 : mgr->listenon6;
dolistenon = ISC_TRUE;
for (le = ISC_LIST_HEAD(ll->elts);
le != NULL;
le = ISC_LIST_NEXT(le, link))
{
int match;
isc_boolean_t ipv6_wildcard = ISC_FALSE;
isc_netaddr_t listen_netaddr;
isc_sockaddr_t listen_sockaddr;
/*
* Construct a socket address for this IP/port
* combination.
*/
if (family == AF_INET) {
isc_netaddr_fromin(&listen_netaddr,
&interface.address.type.in);
} else {
isc_netaddr_fromin6(&listen_netaddr,
&interface.address.type.in6);
isc_netaddr_setzone(&listen_netaddr,
interface.address.zone);
}
isc_sockaddr_fromnetaddr(&listen_sockaddr,
&listen_netaddr,
le->port);
/*
* See if the address matches the listen-on statement;
* if not, ignore the interface.
*/
(void)dns_acl_match(&listen_netaddr, NULL, le->acl,
&mgr->aclenv, &match, NULL);
if (match <= 0)
continue;
if (adjusting == ISC_FALSE && dolistenon == ISC_TRUE) {
setup_listenon(mgr, &interface, le->port);
dolistenon = ISC_FALSE;
}
/*
* The case of "any" IPv6 address will require
* special considerations later, so remember it.
*/
if (family == AF_INET6 && ipv6only && ipv6pktinfo &&
listenon_is_ip6_any(le))
ipv6_wildcard = ISC_TRUE;
/*
* When adjusting interfaces with extra a listening
* list, see if the address matches the extra list.
* If it does, and is also covered by a wildcard
* interface, we need to listen on the address
* explicitly.
*/
if (adjusting == ISC_TRUE) {
ns_listenelt_t *ele;
match = 0;
for (ele = ISC_LIST_HEAD(ext_listen->elts);
ele != NULL;
ele = ISC_LIST_NEXT(ele, link)) {
(void)dns_acl_match(&listen_netaddr,
NULL, ele->acl,
NULL, &match, NULL);
if (match > 0 &&
(ele->port == le->port ||
ele->port == 0))
break;
else
match = 0;
}
if (ipv6_wildcard == ISC_TRUE && match == 0)
continue;
}
ifp = find_matching_interface(mgr, &listen_sockaddr);
if (ifp != NULL) {
ifp->generation = mgr->generation;
} else {
char sabuf[ISC_SOCKADDR_FORMATSIZE];
if (adjusting == ISC_FALSE &&
ipv6_wildcard == ISC_TRUE)
continue;
if (log_explicit && family == AF_INET6 &&
!adjusting && listenon_is_ip6_any(le)) {
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO :
ISC_LOG_DEBUG(1),
"IPv6 socket API is "
"incomplete; explicitly "
"binding to each IPv6 "
"address separately");
log_explicit = ISC_FALSE;
}
isc_sockaddr_format(&listen_sockaddr,
sabuf, sizeof(sabuf));
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_INFO,
"%s"
"listening on %s interface "
"%s, %s",
(adjusting == ISC_TRUE) ?
"additionally " : "",
(family == AF_INET) ?
"IPv4" : "IPv6",
interface.name, sabuf);
result = ns_interface_setup(mgr,
&listen_sockaddr,
interface.name,
&ifp,
(adjusting == ISC_TRUE) ?
ISC_FALSE :
ISC_TRUE);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"creating %s interface "
"%s failed; interface "
"ignored",
(family == AF_INET) ?
"IPv4" : "IPv6",
interface.name);
}
/* Continue. */
}
}
continue;
ignore_interface:
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"ignoring %s interface %s: %s",
(family == AF_INET) ? "IPv4" : "IPv6",
interface.name, isc_result_totext(result));
continue;
}
if (result != ISC_R_NOMORE)
UNEXPECTED_ERROR(__FILE__, __LINE__,
"interface iteration failed: %s",
isc_result_totext(result));
else
result = ISC_R_SUCCESS;
cleanup_iter:
isc_interfaceiter_destroy(&iter);
return (result);
}
isc_result_t
bind9_getaddresses(const char *hostname, in_port_t port,
isc_sockaddr_t *addrs, int addrsize, int *addrcount)
{
struct in_addr in4;
struct in6_addr in6;
isc_boolean_t have_ipv4, have_ipv6;
int i;
#ifdef USE_GETADDRINFO
struct addrinfo *ai = NULL, *tmpai, hints;
int result;
#else
struct hostent *he;
#endif
REQUIRE(hostname != NULL);
REQUIRE(addrs != NULL);
REQUIRE(addrcount != NULL);
REQUIRE(addrsize > 0);
have_ipv4 = ISC_TF((isc_net_probeipv4() == ISC_R_SUCCESS));
have_ipv6 = ISC_TF((isc_net_probeipv6() == ISC_R_SUCCESS));
/*
* Try IPv4, then IPv6. In order to handle the extended format
* for IPv6 scoped addresses (address%scope_ID), we'll use a local
* working buffer of 128 bytes. The length is an ad-hoc value, but
* should be enough for this purpose; the buffer can contain a string
* of at least 80 bytes for scope_ID in addition to any IPv6 numeric
* addresses (up to 46 bytes), the delimiter character and the
* terminating NULL character.
*/
if (inet_pton(AF_INET, hostname, &in4) == 1) {
if (have_ipv4)
isc_sockaddr_fromin(&addrs[0], &in4, port);
else
isc_sockaddr_v6fromin(&addrs[0], &in4, port);
*addrcount = 1;
return (ISC_R_SUCCESS);
} else if (strlen(hostname) <= 127U) {
char tmpbuf[128], *d;
isc_uint32_t zone = 0;
strcpy(tmpbuf, hostname);
d = strchr(tmpbuf, '%');
if (d != NULL)
*d = '\0';
if (inet_pton(AF_INET6, tmpbuf, &in6) == 1) {
isc_netaddr_t na;
if (!have_ipv6)
return (ISC_R_FAMILYNOSUPPORT);
if (d != NULL) {
#ifdef ISC_PLATFORM_HAVESCOPEID
isc_result_t result;
result = isc_netscope_pton(AF_INET6, d + 1,
&in6, &zone);
if (result != ISC_R_SUCCESS)
return (result);
#else
/*
* The extended format is specified while the
* system does not provide the ability to use
* it. Throw an explicit error instead of
* ignoring the specified value.
*/
return (ISC_R_BADADDRESSFORM);
#endif
}
isc_netaddr_fromin6(&na, &in6);
isc_netaddr_setzone(&na, zone);
isc_sockaddr_fromnetaddr(&addrs[0],
(const isc_netaddr_t *)&na,
port);
*addrcount = 1;
return (ISC_R_SUCCESS);
}
}
#ifdef USE_GETADDRINFO
memset(&hints, 0, sizeof(hints));
if (!have_ipv6)
hints.ai_family = PF_INET;
else if (!have_ipv4)
hints.ai_family = PF_INET6;
else {
hints.ai_family = PF_UNSPEC;
#ifdef AI_ADDRCONFIG
hints.ai_flags = AI_ADDRCONFIG;
#endif
}
hints.ai_socktype = SOCK_STREAM;
#ifdef AI_ADDRCONFIG
again:
#endif
result = getaddrinfo(hostname, NULL, &hints, &ai);
switch (result) {
case 0:
break;
case EAI_NONAME:
#if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME)
case EAI_NODATA:
#endif
return (ISC_R_NOTFOUND);
#ifdef AI_ADDRCONFIG
case EAI_BADFLAGS:
if ((hints.ai_flags & AI_ADDRCONFIG) != 0) {
hints.ai_flags &= ~AI_ADDRCONFIG;
goto again;
}
#endif
default:
return (ISC_R_FAILURE);
}
for (tmpai = ai, i = 0;
tmpai != NULL && i < addrsize;
tmpai = tmpai->ai_next)
{
if (tmpai->ai_family != AF_INET &&
tmpai->ai_family != AF_INET6)
continue;
if (tmpai->ai_family == AF_INET) {
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)tmpai->ai_addr;
isc_sockaddr_fromin(&addrs[i], &sin->sin_addr, port);
} else {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)tmpai->ai_addr;
isc_sockaddr_fromin6(&addrs[i], &sin6->sin6_addr,
port);
}
i++;
}
freeaddrinfo(ai);
*addrcount = i;
#else
he = gethostbyname(hostname);
if (he == NULL) {
switch (h_errno) {
case HOST_NOT_FOUND:
#ifdef NO_DATA
case NO_DATA:
#endif
#if defined(NO_ADDRESS) && (!defined(NO_DATA) || (NO_DATA != NO_ADDRESS))
case NO_ADDRESS:
#endif
return (ISC_R_NOTFOUND);
default:
return (ISC_R_FAILURE);
}
}
if (he->h_addrtype != AF_INET && he->h_addrtype != AF_INET6)
return (ISC_R_NOTFOUND);
for (i = 0; i < addrsize; i++) {
if (he->h_addrtype == AF_INET) {
struct in_addr *inp;
inp = (struct in_addr *)(he->h_addr_list[i]);
if (inp == NULL)
break;
isc_sockaddr_fromin(&addrs[i], inp, port);
} else {
struct in6_addr *in6p;
in6p = (struct in6_addr *)(he->h_addr_list[i]);
if (in6p == NULL)
break;
isc_sockaddr_fromin6(&addrs[i], in6p, port);
}
}
*addrcount = i;
#endif
if (*addrcount == 0)
return (ISC_R_NOTFOUND);
else
return (ISC_R_SUCCESS);
}
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);
}
static isc_result_t
linux_if_inet6_current(isc_interfaceiter_t *iter) {
char address[33];
char name[IF_NAMESIZE+1];
char strbuf[ISC_STRERRORSIZE];
struct in6_addr addr6;
struct ifreq ifreq;
int ifindex, prefix, scope, flags;
int res;
unsigned int i;
if (iter->valid != ISC_R_SUCCESS)
return (iter->valid);
if (iter->proc == NULL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"/proc/net/if_inet6:iter->proc == NULL");
return (ISC_R_FAILURE);
}
/*
* Format for /proc/net/if_inet6:
* (see iface_proc_info() in net/ipv6/addrconf.c)
* <addr6:32> <ifindex:2> <prefix:2> <scope:2> <flags:2> <name:8>
*/
res = sscanf(iter->entry, "%32[a-f0-9] %x %x %x %x %16s\n",
address, &ifindex, &prefix, &scope, &flags, name);
if (res != 6) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"/proc/net/if_inet6:sscanf() -> %d (expected 6)",
res);
return (ISC_R_FAILURE);
}
if (strlen(address) != 32) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"/proc/net/if_inet6:strlen(%s) != 32", address);
return (ISC_R_FAILURE);
}
for (i = 0; i < 16; i++) {
unsigned char byte;
static const char hex[] = "0123456789abcdef";
byte = ((index(hex, address[i * 2]) - hex) << 4) |
(index(hex, address[i * 2 + 1]) - hex);
addr6.s6_addr[i] = byte;
}
iter->current.af = AF_INET6;
/* iter->current.ifindex = ifindex; */
iter->current.flags = 0;
memset(&ifreq, 0, sizeof(ifreq));
INSIST(sizeof(ifreq.ifr_name) <= sizeof(iter->current.name));
strncpy(ifreq.ifr_name, name, sizeof(ifreq.ifr_name));
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 ((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
/*
* enable_multicast_if() requires scopeid for setsockopt,
* so associate address with their corresponding ifindex.
*/
isc_netaddr_fromin6(&iter->current.address, &addr6);
isc_netaddr_setzone(&iter->current.address, (isc_uint32_t)ifindex);
for (i = 0; i < 16; i++) {
if (prefix > 8) {
addr6.s6_addr[i] = 0xff;
prefix -= 8;
} else {
addr6.s6_addr[i] = (0xff << (8 - prefix)) & 0xff;
prefix = 0;
}
}
isc_netaddr_fromin6(&iter->current.netmask, &addr6);
strncpy(iter->current.name, name, sizeof(iter->current.name));
return (ISC_R_SUCCESS);
}
static void
get_addr(unsigned int family, isc_netaddr_t *dst, struct sockaddr *src,
char *ifname)
{
struct sockaddr_in6 *sa6;
#if !defined(ISC_PLATFORM_HAVEIFNAMETOINDEX) || \
!defined(ISC_PLATFORM_HAVESCOPEID)
UNUSED(ifname);
#endif
/* clear any remaining value for safety */
memset(dst, 0, sizeof(*dst));
dst->family = family;
switch (family) {
case AF_INET:
memcpy(&dst->type.in,
&((struct sockaddr_in *) src)->sin_addr,
sizeof(struct in_addr));
break;
case AF_INET6:
sa6 = (struct sockaddr_in6 *)src;
memcpy(&dst->type.in6, &sa6->sin6_addr,
sizeof(struct in6_addr));
#ifdef ISC_PLATFORM_HAVESCOPEID
if (sa6->sin6_scope_id != 0)
isc_netaddr_setzone(dst, sa6->sin6_scope_id);
else {
/*
* BSD variants embed scope zone IDs in the 128bit
* address as a kernel internal form. Unfortunately,
* the embedded IDs are not hidden from applications
* when getting access to them by sysctl or ioctl.
* We convert the internal format to the pure address
* part and the zone ID part.
* Since multicast addresses should not appear here
* and they cannot be distinguished from netmasks,
* we only consider unicast link-local addresses.
*/
if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
isc_uint16_t zone16;
memcpy(&zone16, &sa6->sin6_addr.s6_addr[2],
sizeof(zone16));
zone16 = ntohs(zone16);
if (zone16 != 0) {
/* the zone ID is embedded */
isc_netaddr_setzone(dst,
(isc_uint32_t)zone16);
dst->type.in6.s6_addr[2] = 0;
dst->type.in6.s6_addr[3] = 0;
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
} else if (ifname != NULL) {
unsigned int zone;
/*
* sin6_scope_id is still not provided,
* but the corresponding interface name
* is know. Use the interface ID as
* the link ID.
*/
zone = if_nametoindex(ifname);
if (zone != 0) {
isc_netaddr_setzone(dst,
(isc_uint32_t)zone);
}
#endif
}
}
}
#endif
break;
default:
INSIST(0);
break;
}
}