libnl  1.1.4
rtnl.c
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) 2003-2006 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 /**
13  * @ingroup nlfam
14  * @defgroup rtnl Routing Netlink
15  * @{
16  */
17 
18 #include <netlink-local.h>
19 #include <netlink/netlink.h>
20 #include <netlink/utils.h>
21 #include <netlink/route/rtnl.h>
22 
23 /**
24  * @name Sending
25  * @{
26  */
27 
28 /**
29  * Send routing netlink request message
30  * @arg handle Netlink handle.
31  * @arg type Netlink message type.
32  * @arg family Address family.
33  * @arg flags Additional netlink message flags.
34  *
35  * Fills out a routing netlink request message and sends it out
36  * using nl_send_simple().
37  *
38  * @return 0 on success or a negative error code.
39  */
40 int nl_rtgen_request(struct nl_handle *handle, int type, int family, int flags)
41 {
42  struct rtgenmsg gmsg = {
43  .rtgen_family = family,
44  };
45 
46  return nl_send_simple(handle, type, flags, &gmsg, sizeof(gmsg));
47 }
48 
49 /** @} */
50 
51 /**
52  * @name Routing Type Translations
53  * @{
54  */
55 
56 static struct trans_tbl rtntypes[] = {
57  __ADD(RTN_UNSPEC,unspec)
58  __ADD(RTN_UNICAST,unicast)
59  __ADD(RTN_LOCAL,local)
60  __ADD(RTN_BROADCAST,broadcast)
61  __ADD(RTN_ANYCAST,anycast)
62  __ADD(RTN_MULTICAST,multicast)
63  __ADD(RTN_BLACKHOLE,blackhole)
64  __ADD(RTN_UNREACHABLE,unreachable)
65  __ADD(RTN_PROHIBIT,prohibit)
66  __ADD(RTN_THROW,throw)
67  __ADD(RTN_NAT,nat)
68  __ADD(RTN_XRESOLVE,xresolve)
69 };
70 
71 char *nl_rtntype2str(int type, char *buf, size_t size)
72 {
73  return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
74 }
75 
76 int nl_str2rtntype(const char *name)
77 {
78  return __str2type(name, rtntypes, ARRAY_SIZE(rtntypes));
79 }
80 
81 /** @} */
82 
83 /**
84  * @name Scope Translations
85  * @{
86  */
87 
88 static struct trans_tbl scopes[] = {
89  __ADD(255,nowhere)
90  __ADD(254,host)
91  __ADD(253,link)
92  __ADD(200,site)
93  __ADD(0,universe)
94 };
95 
96 char *rtnl_scope2str(int scope, char *buf, size_t size)
97 {
98  return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
99 }
100 
101 int rtnl_str2scope(const char *name)
102 {
103  return __str2type(name, scopes, ARRAY_SIZE(scopes));
104 }
105 
106 /** @} */
107 
108 /**
109  * @name Realms Translations
110  * @{
111  */
112 
113 char * rtnl_realms2str(uint32_t realms, char *buf, size_t len)
114 {
115  int from = RTNL_REALM_FROM(realms);
116  int to = RTNL_REALM_TO(realms);
117 
118  snprintf(buf, len, "%d/%d", from, to);
119 
120  return buf;
121 }
122 
123 /** @} */
124 
125 /** @} */