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1 /*
2  * rtm_map.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 <string.h>
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 
22 #include "rt_names.h"
23 #include "utils.h"
24 
rtnl_rtntype_n2a(int id,char * buf,int len)25 char *rtnl_rtntype_n2a(int id, char *buf, int len)
26 {
27 	switch (id) {
28 	case RTN_UNSPEC:
29 		return "none";
30 	case RTN_UNICAST:
31 		return "unicast";
32 	case RTN_LOCAL:
33 		return "local";
34 	case RTN_BROADCAST:
35 		return "broadcast";
36 	case RTN_ANYCAST:
37 		return "anycast";
38 	case RTN_MULTICAST:
39 		return "multicast";
40 	case RTN_BLACKHOLE:
41 		return "blackhole";
42 	case RTN_UNREACHABLE:
43 		return "unreachable";
44 	case RTN_PROHIBIT:
45 		return "prohibit";
46 	case RTN_THROW:
47 		return "throw";
48 	case RTN_NAT:
49 		return "nat";
50 	case RTN_XRESOLVE:
51 		return "xresolve";
52 	default:
53 		snprintf(buf, len, "%d", id);
54 		return buf;
55 	}
56 }
57 
58 
rtnl_rtntype_a2n(int * id,char * arg)59 int rtnl_rtntype_a2n(int *id, char *arg)
60 {
61 	char *end;
62 	unsigned long res;
63 
64 	if (strcmp(arg, "local") == 0)
65 		res = RTN_LOCAL;
66 	else if (strcmp(arg, "nat") == 0)
67 		res = RTN_NAT;
68 	else if (matches(arg, "broadcast") == 0 ||
69 		 strcmp(arg, "brd") == 0)
70 		res = RTN_BROADCAST;
71 	else if (matches(arg, "anycast") == 0)
72 		res = RTN_ANYCAST;
73 	else if (matches(arg, "multicast") == 0)
74 		res = RTN_MULTICAST;
75 	else if (matches(arg, "prohibit") == 0)
76 		res = RTN_PROHIBIT;
77 	else if (matches(arg, "unreachable") == 0)
78 		res = RTN_UNREACHABLE;
79 	else if (matches(arg, "blackhole") == 0)
80 		res = RTN_BLACKHOLE;
81 	else if (matches(arg, "xresolve") == 0)
82 		res = RTN_XRESOLVE;
83 	else if (matches(arg, "unicast") == 0)
84 		res = RTN_UNICAST;
85 	else if (strcmp(arg, "throw") == 0)
86 		res = RTN_THROW;
87 	else {
88 		res = strtoul(arg, &end, 0);
89 		if (!end || end == arg || *end || res > 255)
90 			return -1;
91 	}
92 	*id = res;
93 	return 0;
94 }
95 
get_rt_realms(__u32 * realms,char * arg)96 int get_rt_realms(__u32 *realms, char *arg)
97 {
98 	__u32 realm = 0;
99 	char *p = strchr(arg, '/');
100 
101 	*realms = 0;
102 	if (p) {
103 		*p = 0;
104 		if (rtnl_rtrealm_a2n(realms, arg)) {
105 			*p = '/';
106 			return -1;
107 		}
108 		*realms <<= 16;
109 		*p = '/';
110 		arg = p+1;
111 	}
112 	if (*arg && rtnl_rtrealm_a2n(&realm, arg))
113 		return -1;
114 	*realms |= realm;
115 	return 0;
116 }
117