1 /*
2 * inet_proto.c
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <syslog.h>
17 #include <fcntl.h>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <netdb.h>
21 #include <string.h>
22
23 #include "rt_names.h"
24 #include "utils.h"
25
inet_proto_n2a(int proto,char * buf,int len)26 const char *inet_proto_n2a(int proto, char *buf, int len)
27 {
28 static char ncache[16];
29 static int icache = -1;
30 struct protoent *pe;
31
32 if (proto == icache)
33 return ncache;
34
35 pe = getprotobynumber(proto);
36 if (pe) {
37 icache = proto;
38 strncpy(ncache, pe->p_name, 16);
39 strncpy(buf, pe->p_name, len);
40 return buf;
41 }
42 snprintf(buf, len, "ipproto-%d", proto);
43 return buf;
44 }
45
inet_proto_a2n(const char * buf)46 int inet_proto_a2n(const char *buf)
47 {
48 static char ncache[16];
49 static int icache = -1;
50 struct protoent *pe;
51
52 if (icache>=0 && strcmp(ncache, buf) == 0)
53 return icache;
54
55 if (buf[0] >= '0' && buf[0] <= '9') {
56 __u8 ret;
57 if (get_u8(&ret, buf, 10))
58 return -1;
59 return ret;
60 }
61
62 pe = getprotobyname(buf);
63 if (pe) {
64 icache = pe->p_proto;
65 strncpy(ncache, pe->p_name, 16);
66 return pe->p_proto;
67 }
68 return -1;
69 }
70
71
72