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/*
*
* 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/ext/filters/client_channel/parse_address.h"
#include "src/core/lib/iomgr/sockaddr.h"
#include <stdio.h>
#include <string.h>
#ifdef GRPC_HAVE_UNIX_SOCKET
#include <sys/un.h>
#endif
#include <grpc/support/alloc.h>
#include <grpc/support/host_port.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/support/string.h"
#ifdef GRPC_HAVE_UNIX_SOCKET
bool grpc_parse_unix(const grpc_uri *uri,
grpc_resolved_address *resolved_addr) {
if (strcmp("unix", uri->scheme) != 0) {
gpr_log(GPR_ERROR, "Expected 'unix' scheme, got '%s'", uri->scheme);
return false;
}
struct sockaddr_un *un = (struct sockaddr_un *)resolved_addr->addr;
const size_t maxlen = sizeof(un->sun_path);
const size_t path_len = strnlen(uri->path, maxlen);
if (path_len == maxlen) return false;
un->sun_family = AF_UNIX;
strcpy(un->sun_path, uri->path);
resolved_addr->len = sizeof(*un);
return true;
}
#else /* GRPC_HAVE_UNIX_SOCKET */
bool grpc_parse_unix(const grpc_uri *uri,
grpc_resolved_address *resolved_addr) {
abort();
}
#endif /* GRPC_HAVE_UNIX_SOCKET */
bool grpc_parse_ipv4_hostport(const char *hostport, grpc_resolved_address *addr,
bool log_errors) {
bool success = false;
// Split host and port.
char *host;
char *port;
if (!gpr_split_host_port(hostport, &host, &port)) return false;
// Parse IP address.
memset(addr, 0, sizeof(*addr));
addr->len = sizeof(struct sockaddr_in);
struct sockaddr_in *in = (struct sockaddr_in *)addr->addr;
in->sin_family = AF_INET;
if (inet_pton(AF_INET, host, &in->sin_addr) == 0) {
if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 address: '%s'", host);
goto done;
}
// Parse port.
if (port == NULL) {
if (log_errors) gpr_log(GPR_ERROR, "no port given for ipv4 scheme");
goto done;
}
int port_num;
if (sscanf(port, "%d", &port_num) != 1 || port_num < 0 || port_num > 65535) {
if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 port: '%s'", port);
goto done;
}
in->sin_port = htons((uint16_t)port_num);
success = true;
done:
gpr_free(host);
gpr_free(port);
return success;
}
bool grpc_parse_ipv4(const grpc_uri *uri,
grpc_resolved_address *resolved_addr) {
if (strcmp("ipv4", uri->scheme) != 0) {
gpr_log(GPR_ERROR, "Expected 'ipv4' scheme, got '%s'", uri->scheme);
return false;
}
const char *host_port = uri->path;
if (*host_port == '/') ++host_port;
return grpc_parse_ipv4_hostport(host_port, resolved_addr,
true /* log_errors */);
}
bool grpc_parse_ipv6_hostport(const char *hostport, grpc_resolved_address *addr,
bool log_errors) {
bool success = false;
// Split host and port.
char *host;
char *port;
if (!gpr_split_host_port(hostport, &host, &port)) return false;
// Parse IP address.
memset(addr, 0, sizeof(*addr));
addr->len = sizeof(struct sockaddr_in6);
struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr->addr;
in6->sin6_family = AF_INET6;
// Handle the RFC6874 syntax for IPv6 zone identifiers.
char *host_end = (char *)gpr_memrchr(host, '%', strlen(host));
if (host_end != NULL) {
GPR_ASSERT(host_end >= host);
char host_without_scope[INET6_ADDRSTRLEN];
size_t host_without_scope_len = (size_t)(host_end - host);
uint32_t sin6_scope_id = 0;
strncpy(host_without_scope, host, host_without_scope_len);
host_without_scope[host_without_scope_len] = '\0';
if (inet_pton(AF_INET6, host_without_scope, &in6->sin6_addr) == 0) {
gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host_without_scope);
goto done;
}
if (gpr_parse_bytes_to_uint32(host_end + 1,
strlen(host) - host_without_scope_len - 1,
&sin6_scope_id) == 0) {
gpr_log(GPR_ERROR, "invalid ipv6 scope id: '%s'", host_end + 1);
goto done;
}
// Handle "sin6_scope_id" being type "u_long". See grpc issue #10027.
in6->sin6_scope_id = sin6_scope_id;
} else {
if (inet_pton(AF_INET6, host, &in6->sin6_addr) == 0) {
gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host);
goto done;
}
}
// Parse port.
if (port == NULL) {
if (log_errors) gpr_log(GPR_ERROR, "no port given for ipv6 scheme");
goto done;
}
int port_num;
if (sscanf(port, "%d", &port_num) != 1 || port_num < 0 || port_num > 65535) {
if (log_errors) gpr_log(GPR_ERROR, "invalid ipv6 port: '%s'", port);
goto done;
}
in6->sin6_port = htons((uint16_t)port_num);
success = true;
done:
gpr_free(host);
gpr_free(port);
return success;
}
bool grpc_parse_ipv6(const grpc_uri *uri,
grpc_resolved_address *resolved_addr) {
if (strcmp("ipv6", uri->scheme) != 0) {
gpr_log(GPR_ERROR, "Expected 'ipv6' scheme, got '%s'", uri->scheme);
return false;
}
const char *host_port = uri->path;
if (*host_port == '/') ++host_port;
return grpc_parse_ipv6_hostport(host_port, resolved_addr,
true /* log_errors */);
}
bool grpc_parse_uri(const grpc_uri *uri, grpc_resolved_address *resolved_addr) {
if (strcmp("unix", uri->scheme) == 0) {
return grpc_parse_unix(uri, resolved_addr);
} else if (strcmp("ipv4", uri->scheme) == 0) {
return grpc_parse_ipv4(uri, resolved_addr);
} else if (strcmp("ipv6", uri->scheme) == 0) {
return grpc_parse_ipv6(uri, resolved_addr);
}
gpr_log(GPR_ERROR, "Can't parse scheme '%s'", uri->scheme);
return false;
}
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