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      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 (at) 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  */
     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 
     70 char *nl_rtntype2str(int type, char *buf, size_t size)
     71 {
     72 	return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
     73 }
     74 
     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 
     95 char *rtnl_scope2str(int scope, char *buf, size_t size)
     96 {
     97 	return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
     98 }
     99 
    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 
    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