68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <netinet/in.h>
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#include "alloc-util.h"
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#include "ip-protocol-list.h"
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#include "macro.h"
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#include "parse-util.h"
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#include "string-util.h"
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static const struct ip_protocol_name* lookup_ip_protocol(register const char *str, register GPERF_LEN_TYPE len);
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#include "ip-protocol-from-name.h"
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#include "ip-protocol-to-name.h"
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const char *ip_protocol_to_name(int id) {
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if (id < 0)
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return NULL;
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if ((size_t) id >= ELEMENTSOF(ip_protocol_names))
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return NULL;
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return ip_protocol_names[id];
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}
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int ip_protocol_from_name(const char *name) {
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const struct ip_protocol_name *sc;
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assert(name);
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sc = lookup_ip_protocol(name, strlen(name));
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if (!sc)
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return -EINVAL;
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return sc->id;
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}
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int parse_ip_protocol(const char *s) {
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_cleanup_free_ char *str = NULL;
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int i, r;
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assert(s);
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if (isempty(s))
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return IPPROTO_IP;
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/* Do not use strdupa() here, as the input string may come from *
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* command line or config files. */
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str = strdup(s);
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if (!str)
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return -ENOMEM;
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i = ip_protocol_from_name(ascii_strlower(str));
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if (i >= 0)
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return i;
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r = safe_atoi(str, &i);
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if (r < 0)
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return r;
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if (!ip_protocol_to_name(i))
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return -EINVAL;
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return i;
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}
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