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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/ext/filters/client_channel/parse_address.h"
#include "src/core/lib/iomgr/grpc_if_nametoindex.h"
#include "src/core/lib/iomgr/sockaddr.h"
#include "src/core/lib/iomgr/socket_utils.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/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/gpr/host_port.h"
#include "src/core/lib/gpr/string.h"
#ifdef GRPC_POSIX_SOCKET
#include <errno.h>
#include <net/if.h>
#endif
#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 =
reinterpret_cast<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 = static_cast<socklen_t>(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)) {
if (log_errors) {
gpr_log(GPR_ERROR, "Failed gpr_split_host_port(%s, ...)", hostport);
}
return false;
}
// Parse IP address.
memset(addr, 0, sizeof(*addr));
addr->len = static_cast<socklen_t>(sizeof(grpc_sockaddr_in));
grpc_sockaddr_in* in = reinterpret_cast<grpc_sockaddr_in*>(addr->addr);
in->sin_family = GRPC_AF_INET;
if (grpc_inet_pton(GRPC_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 == nullptr) {
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 = grpc_htons(static_cast<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)) {
if (log_errors) {
gpr_log(GPR_ERROR, "Failed gpr_split_host_port(%s, ...)", hostport);
}
return false;
}
// Parse IP address.
memset(addr, 0, sizeof(*addr));
addr->len = static_cast<socklen_t>(sizeof(grpc_sockaddr_in6));
grpc_sockaddr_in6* in6 = reinterpret_cast<grpc_sockaddr_in6*>(addr->addr);
in6->sin6_family = GRPC_AF_INET6;
// Handle the RFC6874 syntax for IPv6 zone identifiers.
char* host_end = static_cast<char*>(gpr_memrchr(host, '%', strlen(host)));
if (host_end != nullptr) {
GPR_ASSERT(host_end >= host);
char host_without_scope[GRPC_INET6_ADDRSTRLEN + 1];
size_t host_without_scope_len = static_cast<size_t>(host_end - host);
uint32_t sin6_scope_id = 0;
if (host_without_scope_len > GRPC_INET6_ADDRSTRLEN) {
if (log_errors) {
gpr_log(
GPR_ERROR,
"invalid ipv6 address length %zu. Length cannot be greater than "
"GRPC_INET6_ADDRSTRLEN i.e %d)",
host_without_scope_len, GRPC_INET6_ADDRSTRLEN);
}
goto done;
}
strncpy(host_without_scope, host, host_without_scope_len);
host_without_scope[host_without_scope_len] = '\0';
if (grpc_inet_pton(GRPC_AF_INET6, host_without_scope, &in6->sin6_addr) ==
0) {
if (log_errors) {
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) {
if ((sin6_scope_id = grpc_if_nametoindex(host_end + 1)) == 0) {
gpr_log(GPR_ERROR,
"Invalid interface name: '%s'. "
"Non-numeric and failed if_nametoindex.",
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 (grpc_inet_pton(GRPC_AF_INET6, host, &in6->sin6_addr) == 0) {
if (log_errors) gpr_log(GPR_ERROR, "invalid ipv6 address: '%s'", host);
goto done;
}
}
// Parse port.
if (port == nullptr) {
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 = grpc_htons(static_cast<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;
}
uint16_t grpc_strhtons(const char* port) {
if (strcmp(port, "http") == 0) {
return htons(80);
} else if (strcmp(port, "https") == 0) {
return htons(443);
}
return htons(static_cast<unsigned short>(atoi(port)));
}
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