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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <netinet/in.h>
#include "alloc-util.h"
#include "ip-protocol-list.h"
#include "macro.h"
#include "parse-util.h"
#include "string-util.h"
static const struct ip_protocol_name* lookup_ip_protocol(register const char *str, register GPERF_LEN_TYPE len);
#include "ip-protocol-from-name.h"
#include "ip-protocol-to-name.h"
const char *ip_protocol_to_name(int id) {
if (id < 0)
return NULL;
if ((size_t) id >= ELEMENTSOF(ip_protocol_names))
return NULL;
return ip_protocol_names[id];
}
int ip_protocol_from_name(const char *name) {
const struct ip_protocol_name *sc;
assert(name);
sc = lookup_ip_protocol(name, strlen(name));
if (!sc)
return -EINVAL;
return sc->id;
}
int parse_ip_protocol_full(const char *s, bool relaxed) {
int r, p;
assert(s);
if (isempty(s))
return IPPROTO_IP;
/* People commonly use lowercase protocol names, which we can look up very quickly, so let's try that
* first. */
r = ip_protocol_from_name(s);
if (r >= 0)
return r;
/* Do not use strdupa() here, as the input string may come from command line or config files. */
_cleanup_free_ char *t = strdup(s);
if (!t)
return -ENOMEM;
r = ip_protocol_from_name(ascii_strlower(t));
if (r >= 0)
return r;
r = safe_atoi(t, &p);
if (r < 0)
return r;
if (p < 0)
return -ERANGE;
/* If @relaxed, we don't check that we have a name for the protocol. */
if (!relaxed && !ip_protocol_to_name(p))
return -EPROTONOSUPPORT;
return p;
}
const char *ip_protocol_to_tcp_udp(int id) {
return IN_SET(id, IPPROTO_TCP, IPPROTO_UDP) ?
ip_protocol_to_name(id) : NULL;
}
int ip_protocol_from_tcp_udp(const char *ip_protocol) {
int id = ip_protocol_from_name(ip_protocol);
return IN_SET(id, IPPROTO_TCP, IPPROTO_UDP) ? id : -EINVAL;
}
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