osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 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 "utils.h" |
| 24 | |
| 25 | char *inet_proto_n2a(int proto, char *buf, int len) |
| 26 | { |
| 27 | static char ncache[16]; |
| 28 | static int icache = -1; |
| 29 | struct protoent *pe; |
| 30 | |
| 31 | if (proto == icache) |
| 32 | return ncache; |
| 33 | |
| 34 | pe = getprotobynumber(proto); |
| 35 | if (pe) { |
| 36 | icache = proto; |
| 37 | strncpy(ncache, pe->p_name, 16); |
| 38 | strncpy(buf, pe->p_name, len); |
| 39 | return buf; |
| 40 | } |
| 41 | snprintf(buf, len, "ipproto-%d", proto); |
| 42 | return buf; |
| 43 | } |
| 44 | |
| 45 | int inet_proto_a2n(char *buf) |
| 46 | { |
| 47 | static char ncache[16]; |
| 48 | static int icache = -1; |
| 49 | struct protoent *pe; |
| 50 | |
| 51 | if (icache>=0 && strcmp(ncache, buf) == 0) |
| 52 | return icache; |
| 53 | |
| 54 | if (buf[0] >= '0' && buf[0] <= '9') { |
| 55 | __u8 ret; |
| 56 | if (get_u8(&ret, buf, 10)) |
| 57 | return -1; |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | pe = getprotobyname(buf); |
| 62 | if (pe) { |
| 63 | icache = pe->p_proto; |
| 64 | strncpy(ncache, pe->p_name, 16); |
| 65 | return pe->p_proto; |
| 66 | } |
| 67 | return -1; |
| 68 | } |
| 69 | |
| 70 | |