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/*
*
* Copyright 2015-2016, 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 <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/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 = 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;
}
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