| /* |
| * |
| * Copyright 2015 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/lib/gpr/host_port.h" |
| |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/lib/gpr/string.h" |
| |
| int gpr_join_host_port(char** out, const char* host, int port) { |
| if (host[0] != '[' && strchr(host, ':') != nullptr) { |
| /* IPv6 literals must be enclosed in brackets. */ |
| return gpr_asprintf(out, "[%s]:%d", host, port); |
| } else { |
| /* Ordinary non-bracketed host:port. */ |
| return gpr_asprintf(out, "%s:%d", host, port); |
| } |
| } |
| |
| int gpr_split_host_port(const char* name, char** host, char** port) { |
| const char* host_start; |
| size_t host_len; |
| const char* port_start; |
| |
| *host = nullptr; |
| *port = nullptr; |
| |
| if (name[0] == '[') { |
| /* Parse a bracketed host, typically an IPv6 literal. */ |
| const char* rbracket = strchr(name, ']'); |
| if (rbracket == nullptr) { |
| /* Unmatched [ */ |
| return 0; |
| } |
| if (rbracket[1] == '\0') { |
| /* ]<end> */ |
| port_start = nullptr; |
| } else if (rbracket[1] == ':') { |
| /* ]:<port?> */ |
| port_start = rbracket + 2; |
| } else { |
| /* ]<invalid> */ |
| return 0; |
| } |
| host_start = name + 1; |
| host_len = static_cast<size_t>(rbracket - host_start); |
| if (memchr(host_start, ':', host_len) == nullptr) { |
| /* Require all bracketed hosts to contain a colon, because a hostname or |
| IPv4 address should never use brackets. */ |
| return 0; |
| } |
| } else { |
| const char* colon = strchr(name, ':'); |
| if (colon != nullptr && strchr(colon + 1, ':') == nullptr) { |
| /* Exactly 1 colon. Split into host:port. */ |
| host_start = name; |
| host_len = static_cast<size_t>(colon - name); |
| port_start = colon + 1; |
| } else { |
| /* 0 or 2+ colons. Bare hostname or IPv6 litearal. */ |
| host_start = name; |
| host_len = strlen(name); |
| port_start = nullptr; |
| } |
| } |
| |
| /* Allocate return values. */ |
| *host = static_cast<char*>(gpr_malloc(host_len + 1)); |
| memcpy(*host, host_start, host_len); |
| (*host)[host_len] = '\0'; |
| |
| if (port_start != nullptr) { |
| *port = gpr_strdup(port_start); |
| } |
| |
| return 1; |
| } |