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) 2003-2012 Thomas Graf <tgraf@suug.ch>
10 */
11
12 /**
13 * @defgroup rtnl Routing Library (libnl-route)
14 * @{
15 */
16
17 #include <netlink-private/netlink.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. Due to a bug in
38 * older versions, this returned the number of bytes sent. So for
39 * compatibility, treat positive return values as success too.
40 */
nl_rtgen_request(struct nl_sock * sk,int type,int family,int flags)41 int nl_rtgen_request(struct nl_sock *sk, int type, int family, int flags)
42 {
43 int err;
44 struct rtgenmsg gmsg = {
45 .rtgen_family = family,
46 };
47
48 err = nl_send_simple(sk, type, flags, &gmsg, sizeof(gmsg));
49
50 return err >= 0 ? 0 : err;
51 }
52
53 /** @} */
54
55 /**
56 * @name Routing Type Translations
57 * @{
58 */
59
60 static const struct trans_tbl rtntypes[] = {
61 __ADD(RTN_UNSPEC,unspec)
62 __ADD(RTN_UNICAST,unicast)
63 __ADD(RTN_LOCAL,local)
64 __ADD(RTN_BROADCAST,broadcast)
65 __ADD(RTN_ANYCAST,anycast)
66 __ADD(RTN_MULTICAST,multicast)
67 __ADD(RTN_BLACKHOLE,blackhole)
68 __ADD(RTN_UNREACHABLE,unreachable)
69 __ADD(RTN_PROHIBIT,prohibit)
70 __ADD(RTN_THROW,throw)
71 __ADD(RTN_NAT,nat)
72 __ADD(RTN_XRESOLVE,xresolve)
73 };
74
nl_rtntype2str(int type,char * buf,size_t size)75 char *nl_rtntype2str(int type, char *buf, size_t size)
76 {
77 return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
78 }
79
nl_str2rtntype(const char * name)80 int nl_str2rtntype(const char *name)
81 {
82 return __str2type(name, rtntypes, ARRAY_SIZE(rtntypes));
83 }
84
85 /** @} */
86
87 /**
88 * @name Scope Translations
89 * @{
90 */
91
92 static const struct trans_tbl scopes[] = {
93 __ADD(255,nowhere)
94 __ADD(254,host)
95 __ADD(253,link)
96 __ADD(200,site)
97 __ADD(0,global)
98 };
99
rtnl_scope2str(int scope,char * buf,size_t size)100 char *rtnl_scope2str(int scope, char *buf, size_t size)
101 {
102 return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
103 }
104
rtnl_str2scope(const char * name)105 int rtnl_str2scope(const char *name)
106 {
107 return __str2type(name, scopes, ARRAY_SIZE(scopes));
108 }
109
110 /** @} */
111
112 /**
113 * @name Realms Translations
114 * @{
115 */
116
rtnl_realms2str(uint32_t realms,char * buf,size_t len)117 char * rtnl_realms2str(uint32_t realms, char *buf, size_t len)
118 {
119 int from = RTNL_REALM_FROM(realms);
120 int to = RTNL_REALM_TO(realms);
121
122 snprintf(buf, len, "%d/%d", from, to);
123
124 return buf;
125 }
126
127 /** @} */
128
129 /** @} */
130