1 /*
2 * lib/route/rtnl.c Routing Netlink
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation version 2.1
7 * of the License.
8 *
9 * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
10 */
11
12 /**
13 * @defgroup rtnl Routing Family
14 * @{
15 */
16
17 #include <netlink-local.h>
18 #include <netlink/netlink.h>
19 #include <netlink/utils.h>
20 #include <netlink/route/rtnl.h>
21
22 /**
23 * @name Sending
24 * @{
25 */
26
27 /**
28 * Send routing netlink request message
29 * @arg sk Netlink socket.
30 * @arg type Netlink message type.
31 * @arg family Address family.
32 * @arg flags Additional netlink message flags.
33 *
34 * Fills out a routing netlink request message and sends it out
35 * using nl_send_simple().
36 *
37 * @return 0 on success or a negative error code.
38 */
nl_rtgen_request(struct nl_sock * sk,int type,int family,int flags)39 int nl_rtgen_request(struct nl_sock *sk, int type, int family, int flags)
40 {
41 struct rtgenmsg gmsg = {
42 .rtgen_family = family,
43 };
44
45 return nl_send_simple(sk, type, flags, &gmsg, sizeof(gmsg));
46 }
47
48 /** @} */
49
50 /**
51 * @name Routing Type Translations
52 * @{
53 */
54
55 static struct trans_tbl rtntypes[] = {
56 __ADD(RTN_UNSPEC,unspec)
57 __ADD(RTN_UNICAST,unicast)
58 __ADD(RTN_LOCAL,local)
59 __ADD(RTN_BROADCAST,broadcast)
60 __ADD(RTN_ANYCAST,anycast)
61 __ADD(RTN_MULTICAST,multicast)
62 __ADD(RTN_BLACKHOLE,blackhole)
63 __ADD(RTN_UNREACHABLE,unreachable)
64 __ADD(RTN_PROHIBIT,prohibit)
65 __ADD(RTN_THROW,throw)
66 __ADD(RTN_NAT,nat)
67 __ADD(RTN_XRESOLVE,xresolve)
68 };
69
nl_rtntype2str(int type,char * buf,size_t size)70 char *nl_rtntype2str(int type, char *buf, size_t size)
71 {
72 return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
73 }
74
nl_str2rtntype(const char * name)75 int nl_str2rtntype(const char *name)
76 {
77 return __str2type(name, rtntypes, ARRAY_SIZE(rtntypes));
78 }
79
80 /** @} */
81
82 /**
83 * @name Scope Translations
84 * @{
85 */
86
87 static struct trans_tbl scopes[] = {
88 __ADD(255,nowhere)
89 __ADD(254,host)
90 __ADD(253,link)
91 __ADD(200,site)
92 __ADD(0,universe)
93 };
94
rtnl_scope2str(int scope,char * buf,size_t size)95 char *rtnl_scope2str(int scope, char *buf, size_t size)
96 {
97 return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
98 }
99
rtnl_str2scope(const char * name)100 int rtnl_str2scope(const char *name)
101 {
102 return __str2type(name, scopes, ARRAY_SIZE(scopes));
103 }
104
105 /** @} */
106
107 /**
108 * @name Realms Translations
109 * @{
110 */
111
rtnl_realms2str(uint32_t realms,char * buf,size_t len)112 char * rtnl_realms2str(uint32_t realms, char *buf, size_t len)
113 {
114 int from = RTNL_REALM_FROM(realms);
115 int to = RTNL_REALM_TO(realms);
116
117 snprintf(buf, len, "%d/%d", from, to);
118
119 return buf;
120 }
121
122 /** @} */
123
124 /** @} */
125