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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif /* HAVE_STDBOOL_H */
#include <stdio.h>
#include <string.h>
#include "sudo_compat.h"
#include "sudo_debug.h"
#include "sudo_gettext.h"
#include "sudo_util.h"
/*
* Parse a string in the form host[:port] where host can also be
* an IPv4 address or an IPv6 address in square brackets.
* Fills in hostp and portp which may point within str, which is modified.
*/
bool
iolog_parse_host_port(char *str, char **hostp, char **portp, bool *tlsp,
char *defport, char *defport_tls)
{
char *flags, *port, *host = str;
bool ret = false;
bool tls = false;
debug_decl(iolog_parse_host_port, SUDO_DEBUG_UTIL);
/* Check for IPv6 address like [::0] followed by optional port */
if (*host == '[') {
host++;
port = strchr(host, ']');
if (port == NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid IPv6 address %s", str);
goto done;
}
*port++ = '\0';
switch (*port) {
case ':':
port++;
break;
case '\0':
port = NULL; /* no port specified */
break;
case '(':
/* flag, handled below */
break;
default:
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid IPv6 address %s", str);
goto done;
}
} else {
port = strrchr(host, ':');
if (port != NULL)
*port++ = '\0';
}
/* Check for optional tls flag at the end. */
flags = strchr(port ? port : host, '(');
if (flags != NULL) {
if (strcasecmp(flags, "(tls)") == 0)
tls = true;
*flags = '\0';
if (port == flags)
port = NULL;
}
if (port == NULL)
port = tls ? defport_tls : defport;
else if (*port == '\0')
goto done;
*hostp = host;
*portp = port;
*tlsp = tls;
ret = true;
done:
debug_return_bool(ret);
}
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