4818248634
The return value of the *nl_send_simple() functions is
inconsistent and not according to the documentation.
nl_send_simple() is document to return the number of bytes sent.
Other *nl_send_simple() functions are documented to return 0 on
success -- for the most part.
See also commit b70174668b which
changed behavior of nl_rtgen_request() to be according to documenation.
Don't change behavior again, only adjust the documentation.
http://lists.infradead.org/pipermail/libnl/2015-May/001872.html
Reported-by: Xiao Jia <stfairy@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
129 lines
2.6 KiB
C
129 lines
2.6 KiB
C
/*
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* lib/route/rtnl.c Routing Netlink
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* Copyright (c) 2003-2012 Thomas Graf <tgraf@suug.ch>
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*/
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/**
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* @defgroup rtnl Routing Library (libnl-route)
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* @{
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*/
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#include <netlink-private/netlink.h>
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#include <netlink/netlink.h>
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#include <netlink/utils.h>
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#include <netlink/route/rtnl.h>
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/**
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* @name Sending
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* @{
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*/
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/**
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* Send routing netlink request message
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* @arg sk Netlink socket.
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* @arg type Netlink message type.
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* @arg family Address family.
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* @arg flags Additional netlink message flags.
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*
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* Fills out a routing netlink request message and sends it out
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* using nl_send_simple().
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*
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* @return 0 on success or a negative error code. Due to a bug in older
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* version of the library, this function returned the number of bytes sent.
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* Treat any non-negative number as success.
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*/
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int nl_rtgen_request(struct nl_sock *sk, int type, int family, int flags)
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{
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int err;
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struct rtgenmsg gmsg = {
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.rtgen_family = family,
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};
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err = nl_send_simple(sk, type, flags, &gmsg, sizeof(gmsg));
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return err >= 0 ? 0 : err;
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}
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/** @} */
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/**
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* @name Routing Type Translations
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* @{
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*/
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static const struct trans_tbl rtntypes[] = {
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__ADD(RTN_UNSPEC,unspec),
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__ADD(RTN_UNICAST,unicast),
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__ADD(RTN_LOCAL,local),
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__ADD(RTN_BROADCAST,broadcast),
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__ADD(RTN_ANYCAST,anycast),
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__ADD(RTN_MULTICAST,multicast),
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__ADD(RTN_BLACKHOLE,blackhole),
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__ADD(RTN_UNREACHABLE,unreachable),
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__ADD(RTN_PROHIBIT,prohibit),
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__ADD(RTN_THROW,throw),
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__ADD(RTN_NAT,nat),
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__ADD(RTN_XRESOLVE,xresolve),
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};
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char *nl_rtntype2str(int type, char *buf, size_t size)
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{
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return __type2str(type, buf, size, rtntypes, ARRAY_SIZE(rtntypes));
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}
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int nl_str2rtntype(const char *name)
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{
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return __str2type(name, rtntypes, ARRAY_SIZE(rtntypes));
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}
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/** @} */
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/**
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* @name Scope Translations
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* @{
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*/
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static const struct trans_tbl scopes[] = {
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__ADD(255,nowhere),
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__ADD(254,host),
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__ADD(253,link),
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__ADD(200,site),
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__ADD(0,global),
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};
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char *rtnl_scope2str(int scope, char *buf, size_t size)
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{
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return __type2str(scope, buf, size, scopes, ARRAY_SIZE(scopes));
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}
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int rtnl_str2scope(const char *name)
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{
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return __str2type(name, scopes, ARRAY_SIZE(scopes));
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}
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/** @} */
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/**
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* @name Realms Translations
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* @{
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*/
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char * rtnl_realms2str(uint32_t realms, char *buf, size_t len)
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{
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int from = RTNL_REALM_FROM(realms);
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int to = RTNL_REALM_TO(realms);
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snprintf(buf, len, "%d/%d", from, to);
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return buf;
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}
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/** @} */
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/** @} */
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