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-rw-r--r--lib/isc/sockaddr.c503
1 files changed, 503 insertions, 0 deletions
diff --git a/lib/isc/sockaddr.c b/lib/isc/sockaddr.c
new file mode 100644
index 000000000000..a0578a0d4bf1
--- /dev/null
+++ b/lib/isc/sockaddr.c
@@ -0,0 +1,503 @@
+/*
+ * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2003 Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC 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: sockaddr.c,v 1.70 2007/06/19 23:47:17 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <isc/buffer.h>
+#include <isc/hash.h>
+#include <isc/msgs.h>
+#include <isc/netaddr.h>
+#include <isc/print.h>
+#include <isc/region.h>
+#include <isc/sockaddr.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+isc_boolean_t
+isc_sockaddr_equal(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
+ return (isc_sockaddr_compare(a, b, ISC_SOCKADDR_CMPADDR|
+ ISC_SOCKADDR_CMPPORT|
+ ISC_SOCKADDR_CMPSCOPE));
+}
+
+isc_boolean_t
+isc_sockaddr_eqaddr(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
+ return (isc_sockaddr_compare(a, b, ISC_SOCKADDR_CMPADDR|
+ ISC_SOCKADDR_CMPSCOPE));
+}
+
+isc_boolean_t
+isc_sockaddr_compare(const isc_sockaddr_t *a, const isc_sockaddr_t *b,
+ unsigned int flags)
+{
+ REQUIRE(a != NULL && b != NULL);
+
+ if (a->length != b->length)
+ return (ISC_FALSE);
+
+ /*
+ * We don't just memcmp because the sin_zero field isn't always
+ * zero.
+ */
+
+ if (a->type.sa.sa_family != b->type.sa.sa_family)
+ return (ISC_FALSE);
+ switch (a->type.sa.sa_family) {
+ case AF_INET:
+ if ((flags & ISC_SOCKADDR_CMPADDR) != 0 &&
+ memcmp(&a->type.sin.sin_addr, &b->type.sin.sin_addr,
+ sizeof(a->type.sin.sin_addr)) != 0)
+ return (ISC_FALSE);
+ if ((flags & ISC_SOCKADDR_CMPPORT) != 0 &&
+ a->type.sin.sin_port != b->type.sin.sin_port)
+ return (ISC_FALSE);
+ break;
+ case AF_INET6:
+ if ((flags & ISC_SOCKADDR_CMPADDR) != 0 &&
+ memcmp(&a->type.sin6.sin6_addr, &b->type.sin6.sin6_addr,
+ sizeof(a->type.sin6.sin6_addr)) != 0)
+ return (ISC_FALSE);
+#ifdef ISC_PLATFORM_HAVESCOPEID
+ /*
+ * If ISC_SOCKADDR_CMPSCOPEZERO is set then don't return
+ * ISC_FALSE if one of the scopes in zero.
+ */
+ if ((flags & ISC_SOCKADDR_CMPSCOPE) != 0 &&
+ a->type.sin6.sin6_scope_id != b->type.sin6.sin6_scope_id &&
+ ((flags & ISC_SOCKADDR_CMPSCOPEZERO) == 0 ||
+ (a->type.sin6.sin6_scope_id != 0 &&
+ b->type.sin6.sin6_scope_id != 0)))
+ return (ISC_FALSE);
+#endif
+ if ((flags & ISC_SOCKADDR_CMPPORT) != 0 &&
+ a->type.sin6.sin6_port != b->type.sin6.sin6_port)
+ return (ISC_FALSE);
+ break;
+ default:
+ if (memcmp(&a->type, &b->type, a->length) != 0)
+ return (ISC_FALSE);
+ }
+ return (ISC_TRUE);
+}
+
+isc_boolean_t
+isc_sockaddr_eqaddrprefix(const isc_sockaddr_t *a, const isc_sockaddr_t *b,
+ unsigned int prefixlen)
+{
+ isc_netaddr_t na, nb;
+ isc_netaddr_fromsockaddr(&na, a);
+ isc_netaddr_fromsockaddr(&nb, b);
+ return (isc_netaddr_eqprefix(&na, &nb, prefixlen));
+}
+
+isc_result_t
+isc_sockaddr_totext(const isc_sockaddr_t *sockaddr, isc_buffer_t *target) {
+ isc_result_t result;
+ isc_netaddr_t netaddr;
+ char pbuf[sizeof("65000")];
+ unsigned int plen;
+ isc_region_t avail;
+
+ REQUIRE(sockaddr != NULL);
+
+ /*
+ * Do the port first, giving us the opportunity to check for
+ * unsupported address families before calling
+ * isc_netaddr_fromsockaddr().
+ */
+ switch (sockaddr->type.sa.sa_family) {
+ case AF_INET:
+ snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin.sin_port));
+ break;
+ case AF_INET6:
+ snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin6.sin6_port));
+ break;
+#ifdef ISC_PLAFORM_HAVESYSUNH
+ case AF_UNIX:
+ plen = strlen(sockaddr->type.sunix.sun_path);
+ if (plen >= isc_buffer_availablelength(target))
+ return (ISC_R_NOSPACE);
+
+ isc_buffer_putmem(target, sockaddr->type.sunix.sun_path, plen);
+
+ /*
+ * Null terminate after used region.
+ */
+ isc_buffer_availableregion(target, &avail);
+ INSIST(avail.length >= 1);
+ avail.base[0] = '\0';
+
+ return (ISC_R_SUCCESS);
+#endif
+ default:
+ return (ISC_R_FAILURE);
+ }
+
+ plen = strlen(pbuf);
+ INSIST(plen < sizeof(pbuf));
+
+ isc_netaddr_fromsockaddr(&netaddr, sockaddr);
+ result = isc_netaddr_totext(&netaddr, target);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ if (1 + plen + 1 > isc_buffer_availablelength(target))
+ return (ISC_R_NOSPACE);
+
+ isc_buffer_putmem(target, (const unsigned char *)"#", 1);
+ isc_buffer_putmem(target, (const unsigned char *)pbuf, plen);
+
+ /*
+ * Null terminate after used region.
+ */
+ isc_buffer_availableregion(target, &avail);
+ INSIST(avail.length >= 1);
+ avail.base[0] = '\0';
+
+ return (ISC_R_SUCCESS);
+}
+
+void
+isc_sockaddr_format(const isc_sockaddr_t *sa, char *array, unsigned int size) {
+ isc_result_t result;
+ isc_buffer_t buf;
+
+ isc_buffer_init(&buf, array, size);
+ result = isc_sockaddr_totext(sa, &buf);
+ if (result != ISC_R_SUCCESS) {
+ /*
+ * The message is the same as in netaddr.c.
+ */
+ snprintf(array, size,
+ isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
+ ISC_MSG_UNKNOWNADDR,
+ "<unknown address, family %u>"),
+ sa->type.sa.sa_family);
+ array[size - 1] = '\0';
+ }
+}
+
+unsigned int
+isc_sockaddr_hash(const isc_sockaddr_t *sockaddr, isc_boolean_t address_only) {
+ unsigned int length = 0;
+ const unsigned char *s = NULL;
+ unsigned int h = 0;
+ unsigned int g;
+ unsigned int p = 0;
+ const struct in6_addr *in6;
+
+ REQUIRE(sockaddr != NULL);
+
+ switch (sockaddr->type.sa.sa_family) {
+ case AF_INET:
+ s = (const unsigned char *)&sockaddr->type.sin.sin_addr;
+ p = ntohs(sockaddr->type.sin.sin_port);
+ length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ in6 = &sockaddr->type.sin6.sin6_addr;
+ if (IN6_IS_ADDR_V4MAPPED(in6)) {
+ s = (const unsigned char *)&in6[12];
+ length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
+ } else {
+ s = (const unsigned char *)in6;
+ length = sizeof(sockaddr->type.sin6.sin6_addr);
+ }
+ p = ntohs(sockaddr->type.sin6.sin6_port);
+ break;
+ default:
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ isc_msgcat_get(isc_msgcat,
+ ISC_MSGSET_SOCKADDR,
+ ISC_MSG_UNKNOWNFAMILY,
+ "unknown address family: %d"),
+ (int)sockaddr->type.sa.sa_family);
+ s = (const unsigned char *)&sockaddr->type;
+ length = sockaddr->length;
+ p = 0;
+ }
+
+ h = isc_hash_calc(s, length, ISC_TRUE);
+ if (!address_only) {
+ g = isc_hash_calc((const unsigned char *)&p, sizeof(p),
+ ISC_TRUE);
+ h = h ^ g; /* XXX: we should concatenate h and p first */
+ }
+
+ return (h);
+}
+
+void
+isc_sockaddr_any(isc_sockaddr_t *sockaddr)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin.sin_family = AF_INET;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
+#endif
+ sockaddr->type.sin.sin_addr.s_addr = INADDR_ANY;
+ sockaddr->type.sin.sin_port = 0;
+ sockaddr->length = sizeof(sockaddr->type.sin);
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+void
+isc_sockaddr_any6(isc_sockaddr_t *sockaddr)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin6.sin6_family = AF_INET6;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
+#endif
+ sockaddr->type.sin6.sin6_addr = in6addr_any;
+ sockaddr->type.sin6.sin6_port = 0;
+ sockaddr->length = sizeof(sockaddr->type.sin6);
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+void
+isc_sockaddr_fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
+ in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin.sin_family = AF_INET;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
+#endif
+ sockaddr->type.sin.sin_addr = *ina;
+ sockaddr->type.sin.sin_port = htons(port);
+ sockaddr->length = sizeof(sockaddr->type.sin);
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+void
+isc_sockaddr_anyofpf(isc_sockaddr_t *sockaddr, int pf) {
+ switch (pf) {
+ case AF_INET:
+ isc_sockaddr_any(sockaddr);
+ break;
+ case AF_INET6:
+ isc_sockaddr_any6(sockaddr);
+ break;
+ default:
+ INSIST(0);
+ }
+}
+
+void
+isc_sockaddr_fromin6(isc_sockaddr_t *sockaddr, const struct in6_addr *ina6,
+ in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin6.sin6_family = AF_INET6;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
+#endif
+ sockaddr->type.sin6.sin6_addr = *ina6;
+ sockaddr->type.sin6.sin6_port = htons(port);
+ sockaddr->length = sizeof(sockaddr->type.sin6);
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+void
+isc_sockaddr_v6fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
+ in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin6.sin6_family = AF_INET6;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
+#endif
+ sockaddr->type.sin6.sin6_addr.s6_addr[10] = 0xff;
+ sockaddr->type.sin6.sin6_addr.s6_addr[11] = 0xff;
+ memcpy(&sockaddr->type.sin6.sin6_addr.s6_addr[12], ina, 4);
+ sockaddr->type.sin6.sin6_port = htons(port);
+ sockaddr->length = sizeof(sockaddr->type.sin6);
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+int
+isc_sockaddr_pf(const isc_sockaddr_t *sockaddr) {
+
+ /*
+ * Get the protocol family of 'sockaddr'.
+ */
+
+#if (AF_INET == PF_INET && AF_INET6 == PF_INET6)
+ /*
+ * Assume that PF_xxx == AF_xxx for all AF and PF.
+ */
+ return (sockaddr->type.sa.sa_family);
+#else
+ switch (sockaddr->type.sa.sa_family) {
+ case AF_INET:
+ return (PF_INET);
+ case AF_INET6:
+ return (PF_INET6);
+ default:
+ FATAL_ERROR(__FILE__, __LINE__,
+ isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
+ ISC_MSG_UNKNOWNFAMILY,
+ "unknown address family: %d"),
+ (int)sockaddr->type.sa.sa_family);
+ }
+#endif
+}
+
+void
+isc_sockaddr_fromnetaddr(isc_sockaddr_t *sockaddr, const isc_netaddr_t *na,
+ in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->type.sin.sin_family = (short)na->family;
+ switch (na->family) {
+ case AF_INET:
+ sockaddr->length = sizeof(sockaddr->type.sin);
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
+#endif
+ sockaddr->type.sin.sin_addr = na->type.in;
+ sockaddr->type.sin.sin_port = htons(port);
+ break;
+ case AF_INET6:
+ sockaddr->length = sizeof(sockaddr->type.sin6);
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
+#endif
+ memcpy(&sockaddr->type.sin6.sin6_addr, &na->type.in6, 16);
+#ifdef ISC_PLATFORM_HAVESCOPEID
+ sockaddr->type.sin6.sin6_scope_id = isc_netaddr_getzone(na);
+#endif
+ sockaddr->type.sin6.sin6_port = htons(port);
+ break;
+ default:
+ INSIST(0);
+ }
+ ISC_LINK_INIT(sockaddr, link);
+}
+
+void
+isc_sockaddr_setport(isc_sockaddr_t *sockaddr, in_port_t port) {
+ switch (sockaddr->type.sa.sa_family) {
+ case AF_INET:
+ sockaddr->type.sin.sin_port = htons(port);
+ break;
+ case AF_INET6:
+ sockaddr->type.sin6.sin6_port = htons(port);
+ break;
+ default:
+ FATAL_ERROR(__FILE__, __LINE__,
+ isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
+ ISC_MSG_UNKNOWNFAMILY,
+ "unknown address family: %d"),
+ (int)sockaddr->type.sa.sa_family);
+ }
+}
+
+in_port_t
+isc_sockaddr_getport(const isc_sockaddr_t *sockaddr) {
+ in_port_t port = 0;
+
+ switch (sockaddr->type.sa.sa_family) {
+ case AF_INET:
+ port = ntohs(sockaddr->type.sin.sin_port);
+ break;
+ case AF_INET6:
+ port = ntohs(sockaddr->type.sin6.sin6_port);
+ break;
+ default:
+ FATAL_ERROR(__FILE__, __LINE__,
+ isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
+ ISC_MSG_UNKNOWNFAMILY,
+ "unknown address family: %d"),
+ (int)sockaddr->type.sa.sa_family);
+ }
+
+ return (port);
+}
+
+isc_boolean_t
+isc_sockaddr_ismulticast(const isc_sockaddr_t *sockaddr) {
+ isc_netaddr_t netaddr;
+
+ if (sockaddr->type.sa.sa_family == AF_INET ||
+ sockaddr->type.sa.sa_family == AF_INET6) {
+ isc_netaddr_fromsockaddr(&netaddr, sockaddr);
+ return (isc_netaddr_ismulticast(&netaddr));
+ }
+ return (ISC_FALSE);
+}
+
+isc_boolean_t
+isc_sockaddr_isexperimental(const isc_sockaddr_t *sockaddr) {
+ isc_netaddr_t netaddr;
+
+ if (sockaddr->type.sa.sa_family == AF_INET) {
+ isc_netaddr_fromsockaddr(&netaddr, sockaddr);
+ return (isc_netaddr_isexperimental(&netaddr));
+ }
+ return (ISC_FALSE);
+}
+
+isc_boolean_t
+isc_sockaddr_issitelocal(const isc_sockaddr_t *sockaddr) {
+ isc_netaddr_t netaddr;
+
+ if (sockaddr->type.sa.sa_family == AF_INET6) {
+ isc_netaddr_fromsockaddr(&netaddr, sockaddr);
+ return (isc_netaddr_issitelocal(&netaddr));
+ }
+ return (ISC_FALSE);
+}
+
+isc_boolean_t
+isc_sockaddr_islinklocal(const isc_sockaddr_t *sockaddr) {
+ isc_netaddr_t netaddr;
+
+ if (sockaddr->type.sa.sa_family == AF_INET6) {
+ isc_netaddr_fromsockaddr(&netaddr, sockaddr);
+ return (isc_netaddr_islinklocal(&netaddr));
+ }
+ return (ISC_FALSE);
+}
+
+isc_result_t
+isc_sockaddr_frompath(isc_sockaddr_t *sockaddr, const char *path) {
+#ifdef ISC_PLATFORM_HAVESYSUNH
+ if (strlen(path) >= sizeof(sockaddr->type.sunix.sun_path))
+ return (ISC_R_NOSPACE);
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->length = sizeof(sockaddr->type.sunix);
+ sockaddr->type.sunix.sun_family = AF_UNIX;
+#ifdef ISC_PLATFORM_HAVESALEN
+ sockaddr->type.sunix.sun_len =
+ (unsigned char)sizeof(sockaddr->type.sunix);
+#endif
+ strcpy(sockaddr->type.sunix.sun_path, path);
+ return (ISC_R_SUCCESS);
+#else
+ UNUSED(sockaddr);
+ UNUSED(path);
+ return (ISC_R_NOTIMPLEMENTED);
+#endif
+}
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