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BIRD Internet Routing Daemon
Commit 1ec52253 authored by Ondřej Zajíček's avatar Ondřej Zajíček
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BFD protocol, ready for release. 

Supports OSPF and BGP and also statically configured sessions.
parent 0e175f9f
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Showing with 1044 additions and 228 deletions
aclocal.m4
View file @ 1ec52253
......@@ -133,6 +133,18 @@ if test "$bird_cv_struct_ip_mreqn" = yes ; then
fi
])
AC_DEFUN(BIRD_CHECK_PTHREADS,
[
bird_tmp_cflags="$CFLAGS"
CFLAGS="$CFLAGS -pthread"
AC_CACHE_CHECK([whether POSIX threads are available], bird_cv_lib_pthreads,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_t pt; pthread_create(&pt, NULL, NULL, NULL); pthread_spinlock_t lock; pthread_spin_lock(&lock); ]])],
[bird_cv_lib_pthreads=yes], [bird_cv_lib_pthreads=no])])
CFLAGS="$bird_tmp_cflags"
])
AC_DEFUN(BIRD_CHECK_GCC_OPTION,
[
bird_tmp_cflags="$CFLAGS"
......
configure.in
View file @ 1ec52253
......@@ -10,6 +10,7 @@ AC_ARG_ENABLE(debug, [ --enable-debug enable internal debugging routin
AC_ARG_ENABLE(memcheck, [ --enable-memcheck check memory allocations when debugging (default: enabled)],,enable_memcheck=yes)
AC_ARG_ENABLE(client, [ --enable-client enable building of BIRD client (default: enabled)],,enable_client=yes)
AC_ARG_ENABLE(ipv6, [ --enable-ipv6 enable building of IPv6 version (default: disabled)],,enable_ipv6=no)
AC_ARG_ENABLE(pthreads, [ --enable-pthreads enable POSIX threads support (default: detect)],,enable_pthreads=try)
AC_ARG_WITH(suffix, [ --with-suffix=STRING use specified suffix for BIRD files (default: 6 for IPv6 version)],[given_suffix="yes"])
AC_ARG_WITH(sysconfig, [ --with-sysconfig=FILE use specified BIRD system configuration file])
AC_ARG_WITH(protocols, [ --with-protocols=LIST include specified routing protocols (default: all)],,[with_protocols="all"])
......@@ -47,11 +48,10 @@ AC_SUBST(runtimedir)
if test "$enable_ipv6" = yes ; then
ip=ipv6
SUFFIX=6
all_protocols=bfd,bgp,ospf,pipe,radv,rip,static
proto_radv=radv
else
ip=ipv4
SUFFIX=""
all_protocols=bfd,bgp,ospf,pipe,rip,static
fi
if test "$given_suffix" = yes ; then
......@@ -59,10 +59,6 @@ if test "$given_suffix" = yes ; then
fi
AC_SUBST(SUFFIX)
if test "$with_protocols" = all ; then
with_protocols="$all_protocols"
fi
if test "$enable_debug" = yes ; then
CONFIG_FILE="bird$SUFFIX.conf"
CONTROL_SOCKET="bird$SUFFIX.ctl"
......@@ -87,12 +83,29 @@ if test -z "$GCC" ; then
AC_MSG_ERROR([This program requires the GNU C Compiler.])
fi
if test "$enable_pthreads" != no ; then
BIRD_CHECK_PTHREADS
if test "$bird_cv_lib_pthreads" = yes ; then
AC_DEFINE(USE_PTHREADS)
CFLAGS="$CFLAGS -pthread"
LDFLAGS="$LDFLAGS -pthread"
proto_bfd=bfd
elif test "$enable_pthreads" = yes ; then
AC_MSG_ERROR([POSIX threads not available.])
fi
if test "$enable_pthreads" = try ; then
enable_pthreads="$bird_cv_lib_pthreads"
fi
fi
if test "$bird_cflags_default" = yes ; then
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign, -Wall)
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)
CFLAGS="$CFLAGS -pthread -Wall -Wstrict-prototypes -Wno-parentheses"
CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -Wno-parentheses"
BIRD_ADD_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign)
BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)
......@@ -183,6 +196,13 @@ fi
AC_SUBST(iproutedir)
all_protocols="$proto_bfd bgp ospf pipe $proto_radv rip static"
all_protocols=`echo $all_protocols | sed 's/ /,/g'`
if test "$with_protocols" = all ; then
with_protocols="$all_protocols"
fi
AC_MSG_CHECKING([protocols])
protocols=`echo "$with_protocols" | sed 's/,/ /g'`
if test "$protocols" = no ; then protocols= ; fi
......@@ -272,6 +292,7 @@ BIRD was configured with the following options:
Iproute2 directory: $iproutedir
System configuration: $sysdesc
Debugging: $enable_debug
POSIX threads: $enable_pthreads
Routing protocols: $protocols
Client: $enable_client
EOF
......
doc/bird.sgml
View file @ 1ec52253
......@@ -1244,6 +1244,178 @@ undefined value is regarded as empty clist for most purposes.
<chapt>Protocols
<sect><label id="sect-bfd">BFD
<sect1>Introduction
<p>Bidirectional Forwarding Detection (BFD) is not a routing protocol itself, it
is an independent tool providing liveness and failure detection. Routing
protocols like OSPF and BGP use integrated periodic "hello" messages to monitor
liveness of neighbors, but detection times of these mechanisms are high (e.g. 40
seconds by default in OSPF, could be set down to several seconds). BFD offers
universal, fast and low-overhead mechanism for failure detection, which could be
attached to any routing protocol in an advisory role.
<p>BFD consists of mostly independent BFD sessions. Each session monitors an
unicast bidirectional path between two BFD-enabled routers. This is done by
periodically sending control packets in both directions. BFD does not handle
neighbor discovery, BFD sessions are created on demand by request of other
protocols (like OSPF or BGP), which supply appropriate information like IP
addresses and associated interfaces. When a session changes its state, these
protocols are notified and act accordingly (e.g. break an OSPF adjacency when
the BFD session went down).
<p>BIRD implements basic BFD behavior as defined in
RFC 5880<htmlurl url="ftp://ftp.rfc-editor.org/in-notes/rfc5880.txt">
(some advanced features like the echo mode or authentication are not implemented),
IP transport for BFD as defined in
RFC 5881<htmlurl url="ftp://ftp.rfc-editor.org/in-notes/rfc5881.txt"> and
RFC 5883<htmlurl url="ftp://ftp.rfc-editor.org/in-notes/rfc5883.txt">
and interaction with client protocols as defined in
RFC 5882<htmlurl url="ftp://ftp.rfc-editor.org/in-notes/rfc5882.txt">.
<p>Note that BFD implementation in BIRD is currently a new feature in
development, expect some rough edges and possible UI and configuration changes
in the future. Also note that we currently support at most one protocol instance.
<sect1>Configuration
<p>BFD configuration consists mainly of multiple definitions of interfaces.
Most BFD config options are session specific. When a new session is requested
and dynamically created, it is configured from one of these definitions. For
sessions to directly connected neighbors, <cf/interface/ definitions are chosen
based on the interface associated with the session, while <cf/multihop/
definition is used for multihop sessions. If no definition is relevant, the
session is just created with the default configuration. Therefore, an empty BFD
configuration is often sufficient.
<p>Note that to use BFD for other protocols like OSPF or BGP, these protocols
also have to be configured to request BFD sessions, usually by <cf/bfd/ option.
<p>Some of BFD session options require <m/time/ value, which has to be specified
with the appropriate unit: <m/num/ <cf/s/|<cf/ms/|<cf/us/. Although microseconds
are allowed as units, practical minimum values are usually in order of tens of
milliseconds.
<code>
protocol bfd [&lt;name&gt;] {
interface &lt;interface pattern&gt; {
interval &lt;time&gt;;
min rx interval &lt;time&gt;;
min tx interval &lt;time&gt;;
idle tx interval &lt;time&gt;;
multiplier &lt;num&gt;;
passive &lt;switch&gt;;
};
multihop {
interval &lt;time&gt;;
min rx interval &lt;time&gt;;
min tx interval &lt;time&gt;;
idle tx interval &lt;time&gt;;
multiplier &lt;num&gt;;
passive &lt;switch&gt;;
};
neighbor &lt;ip&gt; [dev "&lt;interface&gt;"] [local &lt;ip&gt;] [multihop &lt;switch&gt;];
}
</code>
<descrip>
<tag>interface <m/pattern [, ...]/ { <m/options/ }</tag>
Interface definitions allow to specify options for sessions associated
with such interfaces and also may contain interface specific options.
See <ref id="dsc-iface" name="interface"> common option for a detailed
description of interface patterns. Note that contrary to the behavior of
<cf/interface/ definitions of other protocols, BFD protocol would accept
sessions (in default configuration) even on interfaces not covered by
such definitions.
<tag>multihop { <m/options/ }</tag>
Multihop definitions allow to specify options for multihop BFD sessions,
in the same manner as <cf/interface/ definitions are used for directly
connected sessions. Currently only one such definition (for all multihop
sessions) could be used.
<tag>neighbor <m/ip/ [dev "<m/interface/"] [local <m/ip/] [multihop <m/switch/]</tag>
BFD sessions are usually created on demand as requested by other
protocols (like OSPF or BGP). This option allows to explicitly add
a BFD session to the specified neighbor regardless of such requests.
The session is identified by the IP address of the neighbor, with
optional specification of used interface and local IP. By default
the neighbor must be directly connected, unless the the session is
configured as multihop. Note that local IP must be specified for
multihop sessions.
</descrip>
<p>Session specific options (part of <cf/interface/ and <cf/multihop/ definitions):
<descrip>
<tag>interval <m/time/</tag>
BFD ensures availability of the forwarding path associated with the
session by periodically sending BFD control packets in both
directions. The rate of such packets is controlled by two options,
<cf/min rx interval/ and <cf/min tx interval/ (see below). This option
is just a shorthand to set both of these options together.
<tag>min rx interval <m/time/</tag>
This option specifies the minimum RX interval, which is announced to the
neighbor and used there to limit the neighbor's rate of generated BFD
control packets. Default: 10 ms.
<tag>min tx interval <m/time/</tag>
This option specifies the desired TX interval, which controls the rate
of generated BFD control packets (together with <cf/min rx interval/
announced by the neighbor). Note that this value is used only if the BFD
session is up, otherwise the value of <cf/idle tx interval/ is used
instead. Default: 100 ms.
<tag>idle tx interval <m/time/</tag>
In order to limit unnecessary traffic in cases where a neighbor is not
available or not running BFD, the rate of generated BFD control packets
is lower when the BFD session is not up. This option specifies the
desired TX interval in such cases instead of <cf/min tx interval/.
Default: 1 s.
<tag>multiplier <m/num/</tag>
Failure detection time for BFD sessions is based on established rate of
BFD control packets (<cf>min rx/tx interval</cf>) multiplied by this
multiplier, which is essentially (ignoring jitter) a number of missed
packets after which the session is declared down. Note that rates and
multipliers could be different in each direction of a BFD session.
Default: 5.
<tag>passive <m/switch/</tag>
Generally, both BFD session endpoinds try to establish the session by
sending control packets to the other side. This option allows to enable
passive mode, which means that the router does not send BFD packets
until it has received one from the other side. Default: disabled.
</descrip>
<sect1>Example
<p><code>
protocol bfd {
interface "eth*" {
min rx interval 20 ms;
min tx interval 50 ms;
idle tx interval 300 ms;
};
interface "gre*" {
interval 200 ms;
multiplier 10;
passive;
};
multihop {
interval 200 ms;
multiplier 10;
};
neighbor 192.168.1.10;
neighbor 192.168.2.2 dev "eth2";
neighbor 192.168.10.1 local 192.168.1.1 multihop;
}
</code>
<sect>BGP
<p>The Border Gateway Protocol is the routing protocol used for backbone
......@@ -1258,8 +1430,8 @@ AS). Each AS is a part of the network with common management and
common routing policy. It is identified by a unique 16-bit number
(ASN). Routers within each AS usually exchange AS-internal routing
information with each other using an interior gateway protocol (IGP,
such as OSPF or RIP). Boundary routers at the border of
the AS communicate global (inter-AS) network reachability information with
such as OSPF or RIP). Boundary routers at the border of the AS
communicate global (inter-AS) network reachability information with
their neighbors in the neighboring AS'es via exterior BGP (eBGP) and
redistribute received information to other routers in the AS via
interior BGP (iBGP).
......@@ -1412,7 +1584,15 @@ for each neighbor using the following configuration parameters:
<tag>igp table <m/name/</tag> Specifies a table that is used
as an IGP routing table. Default: the same as the table BGP is
connected to.
<tag>bfd <M>switch</M></tag>
BGP could use BFD protocol as an advisory mechanism for neighbor
liveness and failure detection. If enabled, BIRD setups a BFD session
for the BGP neighbor and tracks its liveness by it. This has an
advantage of an order of magnitude lower detection times in case of
failure. Note that BFD protocol also has to be configured, see
<ref id="sect-bfd" name="BFD"> section for details. Default: disabled.
<tag>ttl security <m/switch/</tag> Use GTSM (RFC 5082 - the
generalized TTL security mechanism). GTSM protects against
spoofed packets by ignoring received packets with a smaller
......@@ -1986,6 +2166,7 @@ protocol ospf &lt;name&gt; {
real broadcast &lt;switch&gt;;
ptp netmask &lt;switch&gt;;
check link &lt;switch&gt;;
bfd &lt;switch&gt;;
ecmp weight &lt;num&gt;;
ttl security [&lt;switch&gt;; | tx only]
tx class|dscp &lt;num&gt;;
......@@ -2260,6 +2441,14 @@ protocol ospf &lt;name&gt; {
prefix) is propagated. It is possible that some hardware
drivers or platforms do not implement this feature. Default value is no.
<tag>bfd <M>switch</M></tag>
OSPF could use BFD protocol as an advisory mechanism for neighbor
liveness and failure detection. If enabled, BIRD setups a BFD session
for each OSPF neighbor and tracks its liveness by it. This has an
advantage of an order of magnitude lower detection times in case of
failure. Note that BFD protocol also has to be configured, see
<ref id="sect-bfd" name="BFD"> section for details. Default value is no.
<tag>ttl security [<m/switch/ | tx only]</tag>
TTL security is a feature that protects routing protocols
from remote spoofed packets by using TTL 255 instead of TTL 1
......
lib/birdlib.h
View file @ 1ec52253
......@@ -24,6 +24,8 @@
#define _MAX(a,b) (((a)>(b))?(a):(b))
#ifndef PARSER
#undef MIN
#undef MAX
#define MIN(a,b) _MIN(a,b)
#define MAX(a,b) _MAX(a,b)
#endif
......
lib/printf.c
View file @ 1ec52253
......@@ -276,7 +276,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
ip_ntox(va_arg(args, ip_addr), ipbuf);
else {
ip_ntop(va_arg(args, ip_addr), ipbuf);
if (field_width > 0)
if (field_width == 1)
field_width = STD_ADDRESS_P_LENGTH;
}
s = ipbuf;
......
nest/proto.c
View file @ 1ec52253
......@@ -681,6 +681,9 @@ proto_build(struct protocol *p)
}
}
/* FIXME: convert this call to some protocol hook */
extern void bfd_init_all(void);
/**
* protos_build - build a protocol list
*
......@@ -718,8 +721,10 @@ protos_build(void)
#ifdef CONFIG_BGP
proto_build(&proto_bgp);
#endif
// XXX
#ifdef CONFIG_BFD
proto_build(&proto_bfd);
bfd_init_all();
#endif
proto_pool = rp_new(&root_pool, "Protocols");
proto_flush_event = ev_new(proto_pool);
......
proto/bfd/bfd.c
View file @ 1ec52253
This diff is collapsed.
proto/bfd/bfd.h
View file @ 1ec52253
......@@ -20,6 +20,7 @@
#include "lib/socket.h"
#include "lib/string.h"
#include "nest/bfd.h"
#include "io.h"
......@@ -33,19 +34,23 @@
#define BFD_DEFAULT_MULTIPLIER 5
struct bfd_iface_config;
struct bfd_config
{
struct proto_config c;
list neigh_list; /* List of struct bfd_neighbor */
list patt_list; /* List of iface configs (struct bfd_iface_config) */
list neigh_list; /* List of configured neighbors (struct bfd_neighbor) */
struct bfd_iface_config *multihop; /* Multihop pseudoiface config */
};
struct bfd_session_config
struct bfd_iface_config
{
struct iface_patt i;
u32 min_rx_int;
u32 min_tx_int;
u32 idle_tx_int;
u8 multiplier;
u8 multihop;
u8 passive;
};
......@@ -55,9 +60,12 @@ struct bfd_neighbor
ip_addr addr;
ip_addr local;
struct iface *iface;
struct bfd_session_config *opts;
struct bfd_session *session;
struct neighbor *neigh;
struct bfd_request *req;
u8 multihop;
u8 active;
};
struct bfd_proto
......@@ -66,6 +74,7 @@ struct bfd_proto
struct birdloop *loop;
pool *tpool;
pthread_spinlock_t lock;
node bfd_node;
slab *session_slab;
HASH(struct bfd_session) session_hash_id;
......@@ -77,25 +86,31 @@ struct bfd_proto
sock *rx_1;
sock *rx_m;
list sock_list;
list iface_list;
};
struct bfd_socket
struct bfd_iface
{
node n;
ip_addr local;
struct iface *iface;
struct bfd_iface_config *cf;
struct bfd_proto *bfd;
sock *sk;
u32 uc;
u8 changed;
};
struct bfd_session
{
node n;
ip_addr addr; /* Address of session */
struct bfd_iface *ifa; /* Iface associated with session */
struct bfd_session *next_id; /* Next in bfd.session_hash_id */
struct bfd_session *next_ip; /* Next in bfd.session_hash_ip */
struct bfd_proto *bfd;
u8 opened;
u8 opened_unused;
u8 passive;
u8 poll_active;
u8 poll_scheduled;
......@@ -123,7 +138,9 @@ struct bfd_session
timer2 *tx_timer; /* Periodic control packet timer */
timer2 *hold_timer; /* Timer for session down detection time */
struct bfd_socket *bsock; /* Socket associated with session */
list request_list; /* List of client requests (struct bfd_request) */
bird_clock_t last_state_change; /* Time of last state change */
u8 notify_running; /* 1 if notify hooks are running */
};
......@@ -168,10 +185,7 @@ void bfd_show_sessions(struct proto *P);
/* packets.c */
void bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final);
sock * bfd_open_rx_sk(struct bfd_proto *p, int multihop);
struct bfd_socket * bfd_get_socket(struct bfd_proto *p, ip_addr local, struct iface *ifa);
void bfd_free_socket(struct bfd_socket *sk);
sock * bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa);
#endif /* _BIRD_BFD_H_ */
proto/bfd/config.Y
View file @ 1ec52253
......@@ -12,20 +12,21 @@ CF_HDR
CF_DEFINES
#define BFD_CFG ((struct bfd_config *) this_proto)
#define BFD_SESSION this_bfd_session
#define BFD_IFACE ((struct bfd_iface_config *) this_ipatt)
#define BFD_NEIGHBOR this_bfd_neighbor
static struct bfd_session_config *this_bfd_session;
static struct bfd_neighbor *this_bfd_neighbor;
extern struct bfd_config *bfd_cf;
CF_DECLS
CF_KEYWORDS(BFD, MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, MULTIHOP, PASSIVE,
NEIGHBOR, DEV)
CF_KEYWORDS(BFD, MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, PASSIVE,
INTERFACE, MULTIHOP, NEIGHBOR, DEV, LOCAL)
%type <iface> bfd_neigh_iface
%type <a> bfd_neigh_local
%type <i> bfd_neigh_multihop
CF_GRAMMAR
......@@ -34,12 +35,19 @@ CF_ADDTO(proto, bfd_proto)
bfd_proto_start: proto_start BFD
{
this_proto = proto_config_new(&proto_bfd, sizeof(struct bfd_config), $1);
init_list(&BFD_CFG->patt_list);
init_list(&BFD_CFG->neigh_list);
if (bfd_cf)
cf_error("Only one BFD instance allowed");
bfd_cf = BFD_CFG;
};
bfd_proto_item:
proto_item
| bfd_neighbor
| INTERFACE bfd_iface
| MULTIHOP bfd_multihop
| NEIGHBOR bfd_neighbor
;
bfd_proto_opts:
......@@ -51,38 +59,41 @@ bfd_proto:
bfd_proto_start proto_name '{' bfd_proto_opts '}';
bfd_session_start:
bfd_iface_start:
{
this_bfd_session = cfg_allocz(sizeof(struct bfd_session_config));
this_ipatt = cfg_allocz(sizeof(struct bfd_iface_config));
init_list(&this_ipatt->ipn_list);
BFD_SESSION->min_rx_int = BFD_DEFAULT_MIN_RX_INT;
BFD_SESSION->min_tx_int = BFD_DEFAULT_MIN_TX_INT;
BFD_SESSION->idle_tx_int = BFD_DEFAULT_IDLE_TX_INT;
BFD_SESSION->multiplier = BFD_DEFAULT_MULTIPLIER;
BFD_IFACE->min_rx_int = BFD_DEFAULT_MIN_RX_INT;
BFD_IFACE->min_tx_int = BFD_DEFAULT_MIN_TX_INT;
BFD_IFACE->idle_tx_int = BFD_DEFAULT_IDLE_TX_INT;
BFD_IFACE->multiplier = BFD_DEFAULT_MULTIPLIER;
};
bfd_session_item:
INTERVAL expr_us { BFD_SESSION->min_rx_int = BFD_SESSION->min_tx_int = $2; }
| MIN RX INTERVAL expr_us { BFD_SESSION->min_rx_int = $4; }
| MIN TX INTERVAL expr_us { BFD_SESSION->min_tx_int = $4; }
| IDLE TX INTERVAL expr_us { BFD_SESSION->idle_tx_int = $4; }
| MULTIPLIER expr { BFD_SESSION->multiplier = $2; }
| MULTIHOP bool { BFD_SESSION->multihop = $2; }
| PASSIVE bool { BFD_SESSION->passive = $2; }
bfd_iface_item:
INTERVAL expr_us { BFD_IFACE->min_rx_int = BFD_IFACE->min_tx_int = $2; }
| MIN RX INTERVAL expr_us { BFD_IFACE->min_rx_int = $4; }
| MIN TX INTERVAL expr_us { BFD_IFACE->min_tx_int = $4; }
| IDLE TX INTERVAL expr_us { BFD_IFACE->idle_tx_int = $4; }
| MULTIPLIER expr { BFD_IFACE->multiplier = $2; }
| PASSIVE bool { BFD_IFACE->passive = $2; }
;
bfd_session_opts:
bfd_iface_opts:
/* empty */
| bfd_session_opts bfd_session_item ';'
| bfd_iface_opts bfd_iface_item ';'
;
bfd_session_opt_list:
bfd_iface_opt_list:
/* empty */
| '{' bfd_session_opts '}'
| '{' bfd_iface_opts '}'
;
bfd_session:
bfd_session_start bfd_session_opt_list;
bfd_iface: bfd_iface_start iface_patt_list bfd_iface_opt_list
{ add_tail(&BFD_CFG->patt_list, NODE this_ipatt); };
bfd_multihop: bfd_iface_start bfd_iface_opt_list
{ BFD_CFG->multihop = BFD_IFACE; };
bfd_neigh_iface:
......@@ -96,15 +107,26 @@ bfd_neigh_local:
| LOCAL ipa { $$ = $2; }
;
bfd_neighbor: NEIGHBOR ipa bfd_neigh_iface bfd_neigh_local bfd_session
bfd_neigh_multihop:
/* empty */ { $$ = 0; }
| MULTIHOP bool { $$ = $2; }
;
bfd_neighbor: ipa bfd_neigh_iface bfd_neigh_local bfd_neigh_multihop
{
this_bfd_neighbor = cfg_allocz(sizeof(struct bfd_neighbor));
add_tail(&BFD_CFG->neigh_list, NODE this_bfd_neighbor);
BFD_NEIGHBOR->addr = $2;
BFD_NEIGHBOR->local = $4;
BFD_NEIGHBOR->iface = $3;
BFD_NEIGHBOR->opts = BFD_SESSION;
BFD_NEIGHBOR->addr = $1;
BFD_NEIGHBOR->local = $3;
BFD_NEIGHBOR->iface = $2;
BFD_NEIGHBOR->multihop = $4;
if ($4 && $2)
cf_error("Neighbor cannot set both interface and multihop");
if ($4 && ipa_zero($3))
cf_error("Multihop neighbor requires specified local address");
};
......
proto/bfd/io.c
View file @ 1ec52253
......@@ -52,6 +52,9 @@ struct birdloop
};
/*
* Current thread context
*/
static pthread_key_t current_loop_key;
......@@ -74,6 +77,9 @@ birdloop_init_current(void)
}
/*
* Time clock
*/
static void times_update_alt(struct birdloop *loop);
......@@ -163,6 +169,9 @@ current_time(void)
}
/*
* Wakeup code for birdloop
*/
static void
pipe_new(int *pfds)
......@@ -244,6 +253,9 @@ wakeup_kick(struct birdloop *loop)
}
/*
* Events
*/
static inline uint
events_waiting(struct birdloop *loop)
......@@ -279,12 +291,14 @@ ev2_schedule(event *e)
}
/*
* Timers
*/
#define TIMER_LESS(a,b) ((a)->expires < (b)->expires)
#define TIMER_SWAP(heap,a,b,t) (t = heap[a], heap[a] = heap[b], heap[b] = t, \
heap[a]->index = (a), heap[b]->index = (b))
static inline uint timers_count(struct birdloop *loop)