| /* |
| * |
| * 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/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/support/string.h" |
| |
| int gpr_join_host_port(char **out, const char *host, int port) { |
| if (host[0] != '[' && strchr(host, ':') != NULL) { |
| /* 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 = NULL; |
| *port = NULL; |
| |
| if (name[0] == '[') { |
| /* Parse a bracketed host, typically an IPv6 literal. */ |
| const char *rbracket = strchr(name, ']'); |
| if (rbracket == NULL) { |
| /* Unmatched [ */ |
| return 0; |
| } |
| if (rbracket[1] == '\0') { |
| /* ]<end> */ |
| port_start = NULL; |
| } else if (rbracket[1] == ':') { |
| /* ]:<port?> */ |
| port_start = rbracket + 2; |
| } else { |
| /* ]<invalid> */ |
| return 0; |
| } |
| host_start = name + 1; |
| host_len = (size_t)(rbracket - host_start); |
| if (memchr(host_start, ':', host_len) == NULL) { |
| /* 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 != NULL && strchr(colon + 1, ':') == NULL) { |
| /* Exactly 1 colon. Split into host:port. */ |
| host_start = name; |
| host_len = (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 = NULL; |
| } |
| } |
| |
| /* Allocate return values. */ |
| *host = (char *)gpr_malloc(host_len + 1); |
| memcpy(*host, host_start, host_len); |
| (*host)[host_len] = '\0'; |
| |
| if (port_start != NULL) { |
| *port = gpr_strdup(port_start); |
| } |
| |
| return 1; |
| } |