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-rw-r--r--src/core/lib/iomgr/sockaddr_utils.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/sockaddr_utils.c b/src/core/lib/iomgr/sockaddr_utils.c
new file mode 100644
index 0000000000..127d95c618
--- /dev/null
+++ b/src/core/lib/iomgr/sockaddr_utils.c
@@ -0,0 +1,227 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+#include <errno.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/support/string.h"
+
+static const uint8_t kV4MappedPrefix[] = {0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0xff, 0xff};
+
+int grpc_sockaddr_is_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in *addr4_out) {
+ GPR_ASSERT(addr != (struct sockaddr *)addr4_out);
+ if (addr->sa_family == AF_INET6) {
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ if (memcmp(addr6->sin6_addr.s6_addr, kV4MappedPrefix,
+ sizeof(kV4MappedPrefix)) == 0) {
+ if (addr4_out != NULL) {
+ /* Normalize ::ffff:0.0.0.0/96 to IPv4. */
+ memset(addr4_out, 0, sizeof(*addr4_out));
+ addr4_out->sin_family = AF_INET;
+ /* s6_addr32 would be nice, but it's non-standard. */
+ memcpy(&addr4_out->sin_addr, &addr6->sin6_addr.s6_addr[12], 4);
+ addr4_out->sin_port = addr6->sin6_port;
+ }
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int grpc_sockaddr_to_v4mapped(const struct sockaddr *addr,
+ struct sockaddr_in6 *addr6_out) {
+ GPR_ASSERT(addr != (struct sockaddr *)addr6_out);
+ if (addr->sa_family == AF_INET) {
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ memset(addr6_out, 0, sizeof(*addr6_out));
+ addr6_out->sin6_family = AF_INET6;
+ memcpy(&addr6_out->sin6_addr.s6_addr[0], kV4MappedPrefix, 12);
+ memcpy(&addr6_out->sin6_addr.s6_addr[12], &addr4->sin_addr, 4);
+ addr6_out->sin6_port = addr4->sin_port;
+ return 1;
+ }
+ return 0;
+}
+
+int grpc_sockaddr_is_wildcard(const struct sockaddr *addr, int *port_out) {
+ struct sockaddr_in addr4_normalized;
+ if (grpc_sockaddr_is_v4mapped(addr, &addr4_normalized)) {
+ addr = (struct sockaddr *)&addr4_normalized;
+ }
+ if (addr->sa_family == AF_INET) {
+ /* Check for 0.0.0.0 */
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ if (addr4->sin_addr.s_addr != 0) {
+ return 0;
+ }
+ *port_out = ntohs(addr4->sin_port);
+ return 1;
+ } else if (addr->sa_family == AF_INET6) {
+ /* Check for :: */
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ int i;
+ for (i = 0; i < 16; i++) {
+ if (addr6->sin6_addr.s6_addr[i] != 0) {
+ return 0;
+ }
+ }
+ *port_out = ntohs(addr6->sin6_port);
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+void grpc_sockaddr_make_wildcards(int port, struct sockaddr_in *wild4_out,
+ struct sockaddr_in6 *wild6_out) {
+ grpc_sockaddr_make_wildcard4(port, wild4_out);
+ grpc_sockaddr_make_wildcard6(port, wild6_out);
+}
+
+void grpc_sockaddr_make_wildcard4(int port, struct sockaddr_in *wild_out) {
+ GPR_ASSERT(port >= 0 && port < 65536);
+ memset(wild_out, 0, sizeof(*wild_out));
+ wild_out->sin_family = AF_INET;
+ wild_out->sin_port = htons((uint16_t)port);
+}
+
+void grpc_sockaddr_make_wildcard6(int port, struct sockaddr_in6 *wild_out) {
+ GPR_ASSERT(port >= 0 && port < 65536);
+ memset(wild_out, 0, sizeof(*wild_out));
+ wild_out->sin6_family = AF_INET6;
+ wild_out->sin6_port = htons((uint16_t)port);
+}
+
+int grpc_sockaddr_to_string(char **out, const struct sockaddr *addr,
+ int normalize) {
+ const int save_errno = errno;
+ struct sockaddr_in addr_normalized;
+ char ntop_buf[INET6_ADDRSTRLEN];
+ const void *ip = NULL;
+ int port;
+ int ret;
+
+ *out = NULL;
+ if (normalize && grpc_sockaddr_is_v4mapped(addr, &addr_normalized)) {
+ addr = (const struct sockaddr *)&addr_normalized;
+ }
+ if (addr->sa_family == AF_INET) {
+ const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addr;
+ ip = &addr4->sin_addr;
+ port = ntohs(addr4->sin_port);
+ } else if (addr->sa_family == AF_INET6) {
+ const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addr;
+ ip = &addr6->sin6_addr;
+ port = ntohs(addr6->sin6_port);
+ }
+ /* Windows inet_ntop wants a mutable ip pointer */
+ if (ip != NULL &&
+ inet_ntop(addr->sa_family, (void *)ip, ntop_buf, sizeof(ntop_buf)) !=
+ NULL) {
+ ret = gpr_join_host_port(out, ntop_buf, port);
+ } else {
+ ret = gpr_asprintf(out, "(sockaddr family=%d)", addr->sa_family);
+ }
+ /* This is probably redundant, but we wouldn't want to log the wrong error. */
+ errno = save_errno;
+ return ret;
+}
+
+char *grpc_sockaddr_to_uri(const struct sockaddr *addr) {
+ char *temp;
+ char *result;
+ struct sockaddr_in addr_normalized;
+
+ if (grpc_sockaddr_is_v4mapped(addr, &addr_normalized)) {
+ addr = (const struct sockaddr *)&addr_normalized;
+ }
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ grpc_sockaddr_to_string(&temp, addr, 0);
+ gpr_asprintf(&result, "ipv4:%s", temp);
+ gpr_free(temp);
+ return result;
+ case AF_INET6:
+ grpc_sockaddr_to_string(&temp, addr, 0);
+ gpr_asprintf(&result, "ipv6:%s", temp);
+ gpr_free(temp);
+ return result;
+ default:
+ return grpc_sockaddr_to_uri_unix_if_possible(addr);
+ }
+}
+
+int grpc_sockaddr_get_port(const struct sockaddr *addr) {
+ switch (addr->sa_family) {
+ case AF_INET:
+ return ntohs(((struct sockaddr_in *)addr)->sin_port);
+ case AF_INET6:
+ return ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
+ default:
+ if (grpc_is_unix_socket(addr)) {
+ return 1;
+ }
+ gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_get_port",
+ addr->sa_family);
+ return 0;
+ }
+}
+
+int grpc_sockaddr_set_port(const struct sockaddr *addr, int port) {
+ switch (addr->sa_family) {
+ case AF_INET:
+ GPR_ASSERT(port >= 0 && port < 65536);
+ ((struct sockaddr_in *)addr)->sin_port = htons((uint16_t)port);
+ return 1;
+ case AF_INET6:
+ GPR_ASSERT(port >= 0 && port < 65536);
+ ((struct sockaddr_in6 *)addr)->sin6_port = htons((uint16_t)port);
+ return 1;
+ default:
+ gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_set_port",
+ addr->sa_family);
+ return 0;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 11:42:01 +0000