rtnl.c

00001 /*
00002  * lib/route/rtnl.c             Routing Netlink
00003  *
00004  *      This library is free software; you can redistribute it and/or
00005  *      modify it under the terms of the GNU Lesser General Public
00006  *      License as published by the Free Software Foundation version 2.1
00007  *      of the License.
00008  *
00009  * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
00010  */
00011 
00012 /**
00013  * @defgroup rtnl Routing Family
00014  * @{
00015  */
00016 
00017 #include <netlink-local.h>
00018 #include <netlink/netlink.h>
00019 #include <netlink/utils.h>
00020 #include <netlink/route/rtnl.h>
00021 
00022 /**
00023  * @name Sending
00024  * @{
00025  */
00026 
00027 /**
00028  * Send routing netlink request message
00029  * @arg sk              Netlink socket.
00030  * @arg type            Netlink message type.
00031  * @arg family          Address family.
00032  * @arg flags           Additional netlink message flags.
00033  *
00034  * Fills out a routing netlink request message and sends it out
00035  * using nl_send_simple().
00036  *
00037  * @return 0 on success or a negative error code.
00038  */
00039 int nl_rtgen_request(struct nl_sock *sk, int type, int family, int flags)
00040 {
00041         struct rtgenmsg gmsg = {
00042                 .rtgen_family = family,
00043         };
00044 
00045         return nl_send_simple(sk, type, flags, &gmsg, sizeof(gmsg));
00046 }
00047 
00048 /** @} */
00049 
00050 /**
00051  * @name Routing Type Translations
00052  * @{
00053  */
00054 
00055 static const struct trans_tbl rtntypes[] = {
00056         __ADD(RTN_UNSPEC,unspec)
00057         __ADD(RTN_UNICAST,unicast)
00058         __ADD(RTN_LOCAL,local)
00059         __ADD(RTN_BROADCAST,broadcast)
00060         __ADD(RTN_ANYCAST,anycast)
00061         __ADD(RTN_MULTICAST,multicast)
00062         __ADD(RTN_BLACKHOLE,blackhole)
00063         __ADD(RTN_UNREACHABLE,unreachable)
00064         __ADD(RTN_PROHIBIT,prohibit)
00065         __ADD(RTN_THROW,throw)
00066         __ADD(RTN_NAT,nat)
00067         __ADD(RTN_XRESOLVE,xresolve)
00068 };
00069 
00070 char *nl_rtntype2str(int type, char *buf, size_t size)
00071 {
00072         return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
00073 }
00074 
00075 int nl_str2rtntype(const char *name)
00076 {
00077         return __str2type(name, rtntypes, ARRAY_SIZE(rtntypes));
00078 }
00079 
00080 /** @} */
00081 
00082 /**
00083  * @name Scope Translations
00084  * @{
00085  */
00086 
00087 static const struct trans_tbl scopes[] = {
00088         __ADD(255,nowhere)
00089         __ADD(254,host)
00090         __ADD(253,link)
00091         __ADD(200,site)
00092         __ADD(0,universe)
00093 };
00094 
00095 char *rtnl_scope2str(int scope, char *buf, size_t size)
00096 {
00097         return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
00098 }
00099 
00100 int rtnl_str2scope(const char *name)
00101 {
00102         return __str2type(name, scopes, ARRAY_SIZE(scopes));
00103 }
00104 
00105 /** @} */
00106 
00107 /**
00108  * @name Realms Translations
00109  * @{
00110  */
00111 
00112 char * rtnl_realms2str(uint32_t realms, char *buf, size_t len)
00113 {
00114         int from = RTNL_REALM_FROM(realms);
00115         int to = RTNL_REALM_TO(realms);
00116 
00117         snprintf(buf, len, "%d/%d", from, to);
00118 
00119         return buf;
00120 }
00121 
00122 /** @} */
00123 
00124 /** @} */