/**
* virSocketCheckNetmask:
* @addr1: a first network address
* @addr2: a second network address
* @netmask: the netmask address
*
* Check that @addr1 and @addr2 pertain to the same @netmask address
* range and returns the size of the range
*
* Returns 1 in case of success and 0 in case of failure and
* -1 in case of error
*/
int virSocketAddrCheckNetmask(virSocketAddrPtr addr1, virSocketAddrPtr addr2,
virSocketAddrPtr netmask)
{
size_t i;
if ((addr1 == NULL) || (addr2 == NULL) || (netmask == NULL))
return -1;
if ((addr1->data.stor.ss_family != addr2->data.stor.ss_family) ||
(addr1->data.stor.ss_family != netmask->data.stor.ss_family))
return -1;
if (virSocketAddrIsNetmask(netmask) != 0)
return -1;
if (addr1->data.stor.ss_family == AF_INET) {
virSocketAddrIPv4 t1, t2, tm;
if ((virSocketAddrGetIPv4Addr(addr1, &t1) < 0) ||
(virSocketAddrGetIPv4Addr(addr2, &t2) < 0) ||
(virSocketAddrGetIPv4Addr(netmask, &tm) < 0))
return -1;
for (i = 0; i < 4; i++) {
if ((t1[i] & tm[i]) != (t2[i] & tm[i]))
return 0;
}
} else if (addr1->data.stor.ss_family == AF_INET6) {
virSocketAddrIPv6 t1, t2, tm;
if ((virSocketAddrGetIPv6Addr(addr1, &t1) < 0) ||
(virSocketAddrGetIPv6Addr(addr2, &t2) < 0) ||
(virSocketAddrGetIPv6Addr(netmask, &tm) < 0))
return -1;
for (i = 0; i < 8; i++) {
if ((t1[i] & tm[i]) != (t2[i] & tm[i]))
return 0;
}
} else {
return -1;
}
return 1;
}
/**
* virSocketGetRange:
* @start: start of an IP range
* @end: end of an IP range
*
* Check the order of the 2 addresses and compute the range, this
* will return 1 for identical addresses. Errors can come from incompatible
* addresses type, excessive range (>= 2^^16) where the two addresses are
* unrelated or inverted start and end.
*
* Returns the size of the range or -1 in case of failure
*/
int virSocketAddrGetRange(virSocketAddrPtr start, virSocketAddrPtr end) {
int ret = 0, i;
if ((start == NULL) || (end == NULL))
return(-1);
if (start->data.stor.ss_family != end->data.stor.ss_family)
return(-1);
if (start->data.stor.ss_family == AF_INET) {
virSocketAddrIPv4 t1, t2;
if ((virSocketAddrGetIPv4Addr(start, &t1) < 0) ||
(virSocketAddrGetIPv4Addr(end, &t2) < 0))
return(-1);
for (i = 0;i < 2;i++) {
if (t1[i] != t2[i])
return(-1);
}
ret = (t2[2] - t1[2]) * 256 + (t2[3] - t1[3]);
if (ret < 0)
return(-1);
ret++;
} else if (start->data.stor.ss_family == AF_INET6) {
virSocketAddrIPv6 t1, t2;
if ((virSocketAddrGetIPv6Addr(start, &t1) < 0) ||
(virSocketAddrGetIPv6Addr(end, &t2) < 0))
return(-1);
for (i = 0;i < 7;i++) {
if (t1[i] != t2[i])
return(-1);
}
ret = t2[7] - t1[7];
if (ret < 0)
return(-1);
ret++;
} else {
return(-1);
}
return(ret);
}
/**
* virSocketGetRange:
* @start: start of an IP range
* @end: end of an IP range
* @network: IP address of network that should completely contain this range
* @prefix: prefix of the network
*
* Check the order of the 2 addresses and compute the range, this will
* return 1 for identical addresses. Errors can come from incompatible
* addresses type, excessive range (>= 2^^16) where the two addresses
* are unrelated, inverted start and end, or a range that is not
* within network/prefix.
*
* Returns the size of the range or -1 in case of failure
*/
int
virSocketAddrGetRange(virSocketAddrPtr start, virSocketAddrPtr end,
virSocketAddrPtr network, int prefix)
{
int ret = 0;
size_t i;
virSocketAddr netmask;
char *startStr = NULL, *endStr = NULL, *netStr = NULL;
if (start == NULL || end == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("NULL argument - %p %p"), start, end);
goto error;
}
startStr = virSocketAddrFormat(start);
endStr = virSocketAddrFormat(end);
if (!startStr || !endStr)
goto error; /*error already reported */
if (VIR_SOCKET_ADDR_FAMILY(start) != VIR_SOCKET_ADDR_FAMILY(end)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("mismatch of address family in range %s - %s"),
startStr, endStr);
goto error;
}
if (network) {
/* some checks can only be done if we have details of the
* network the range should be within
*/
if (!(netStr = virSocketAddrFormat(network)))
goto error;
if (VIR_SOCKET_ADDR_FAMILY(start) != VIR_SOCKET_ADDR_FAMILY(network)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("mismatch of address family in "
"range %s - %s for network %s"),
startStr, endStr, netStr);
goto error;
}
if (prefix < 0 ||
virSocketAddrPrefixToNetmask(prefix, &netmask,
VIR_SOCKET_ADDR_FAMILY(network)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("bad prefix %d for network %s when "
" checking range %s - %s"),
prefix, netStr, startStr, endStr);
goto error;
}
/* both start and end of range need to be within network */
if (virSocketAddrCheckNetmask(start, network, &netmask) <= 0 ||
virSocketAddrCheckNetmask(end, network, &netmask) <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("range %s - %s is not entirely within "
"network %s/%d"),
startStr, endStr, netStr, prefix);
goto error;
}
if (VIR_SOCKET_ADDR_IS_FAMILY(start, AF_INET)) {
virSocketAddr netaddr, broadcast;
if (virSocketAddrBroadcast(network, &netmask, &broadcast) < 0 ||
virSocketAddrMask(network, &netmask, &netaddr) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to construct broadcast or network "
"address for network %s/%d"),
netStr, prefix);
goto error;
}
/* Don't allow the start of the range to be the network
* address (usually "...0") or the end of the range to be the
* broadcast address (usually "...255"). (the opposite also
* isn't allowed, but checking for that is implicit in all the
* other combined checks) (IPv6 doesn't have broadcast and
* network addresses, so this check is only done for IPv4)
*/
if (virSocketAddrEqual(start, &netaddr)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("start of range %s - %s in network %s/%d "
"is the network address"),
startStr, endStr, netStr, prefix);
goto error;
}
if (virSocketAddrEqual(end, &broadcast)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("end of range %s - %s in network %s/%d "
"is the broadcast address"),
startStr, endStr, netStr, prefix);
goto error;
}
}
}
if (VIR_SOCKET_ADDR_IS_FAMILY(start, AF_INET)) {
virSocketAddrIPv4 t1, t2;
if (virSocketAddrGetIPv4Addr(start, &t1) < 0 ||
virSocketAddrGetIPv4Addr(end, &t2) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to get IPv4 address "
"for start or end of range %s - %s"),
startStr, endStr);
goto error;
}
/* legacy check that everything except the last two bytes
* are the same
*/
for (i = 0; i < 2; i++) {
if (t1[i] != t2[i]) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("range %s - %s is too large (> 65535)"),
startStr, endStr);
goto error;
}
}
ret = (t2[2] - t1[2]) * 256 + (t2[3] - t1[3]);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("range %s - %s is reversed "),
startStr, endStr);
goto error;
}
ret++;
} else if (VIR_SOCKET_ADDR_IS_FAMILY(start, AF_INET6)) {
virSocketAddrIPv6 t1, t2;
if (virSocketAddrGetIPv6Addr(start, &t1) < 0 ||
virSocketAddrGetIPv6Addr(end, &t2) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to get IPv6 address "
"for start or end of range %s - %s"),
startStr, endStr);
goto error;
}
/* legacy check that everything except the last two bytes are
* the same
*/
for (i = 0; i < 7; i++) {
if (t1[i] != t2[i]) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("range %s - %s is too large (> 65535)"),
startStr, endStr);
goto error;
}
}
ret = t2[7] - t1[7];
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("range %s - %s start larger than end"),
startStr, endStr);
goto error;
}
ret++;
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unsupported address family "
"for range %s - %s, must be ipv4 or ipv6"),
startStr, endStr);
goto error;
}
cleanup:
VIR_FREE(startStr);
VIR_FREE(endStr);
VIR_FREE(netStr);
return ret;
error:
ret = -1;
goto cleanup;
}
