| /* |
| * |
| * Copyright 2015, 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 <grpc/support/host_port.h> |
| |
| #include <string.h> |
| |
| #include "src/core/support/string.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.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 = 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; |
| } |