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/* SA ID, for libreswan
*
* Copyright (C) 2019 Andrew Cagney <cagney@gnu.org>
* Copyright (C) 2000, 2001 Henry Spencer.
* Copyright (C) 2012 David McCullough <david_mccullough@mcafee.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "ip_said.h"
#include "ip_info.h"
#include "jambuf.h"
const ip_said unset_said;
ip_said said_from_raw(where_t where UNUSED,
const struct ip_info *afi,
const struct ip_bytes dst,
const struct ip_protocol *protocol,
ipsec_spi_t spi)
{
ip_said said = {
.is_set = true,
.version = afi->ip_version,
.dst = dst,
.ipproto = protocol->ipproto,
.spi = spi,
};
return said;
}
ip_said said_from_address_protocol_spi(const ip_address address,
const struct ip_protocol *protocol,
ipsec_spi_t spi)
{
const struct ip_info *afi = address_info(address);
if (afi == NULL) {
/* NULL+unset+unknown */
return unset_said;
}
return said_from_raw(HERE, afi, address.bytes,
protocol, spi);
}
bool said_is_unset(const ip_said *said)
{
if (said == NULL) {
return true;
}
return !said->is_set;
}
/*
* convert SA to text "ah507@1.2.3.4"
*/
size_t jam_said(struct jambuf *buf, const ip_said *said)
{
if (!said->is_set) {
return jam_string(buf, "<unset-said>");
}
const struct ip_info *afi = said_type(said);
if (afi == NULL) {
return jam(buf, "<said-has-no-type");
}
const struct ip_protocol *proto = protocol_from_ipproto(said->ipproto);
if (proto == &ip_protocol_ipip/*TUN*/ &&
said->spi == PASSTHROUGHSPI &&
/* any zero */ thingeq(said->dst, unset_ip_bytes)) {
return jam_string(buf, (afi == &ipv4_info ? PASSTHROUGH4NAME :
afi == &ipv6_info ? PASSTHROUGH6NAME :
"<unknown-said-version>"));;
}
/* general case needed */
size_t s = 0;
s += jam_string(buf, proto->prefix != NULL ? proto->prefix : proto->name);
/* .SPI */
s += jam_char(buf, (afi == &ipv4_info ? '.' :
afi == &ipv6_info ? ':' :
'?'));
s += jam(buf, "%x", ntohl(said->spi));;
s += jam_char(buf, '@');
s += afi->jam.address(buf, afi, &said->dst);
return s;
}
const char *str_said(const ip_said *said, said_buf *buf)
{
struct jambuf b = ARRAY_AS_JAMBUF(buf->buf);
jam_said(&b, said);
return buf->buf;
}
const struct ip_info *said_type(const ip_said *said)
{
if (said == NULL) {
return NULL;
}
/* may return NULL */
return said_info(*said);
}
const struct ip_info *said_info(const ip_said said)
{
if (!said.is_set) {
return NULL;
}
/* may return NULL */
return ip_version_info(said.version);
}
ip_address said_address(const ip_said said)
{
const struct ip_info *afi = said_info(said);
if (afi == NULL) {
/* NULL+unset+unknown */
return unset_address; /* empty_address? */
}
return address_from_raw(HERE, afi, said.dst);
}
const struct ip_protocol *said_protocol(const ip_said said)
{
if (said_is_unset(&said)) {
return NULL;
}
return protocol_from_ipproto(said.ipproto);
}
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