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Merge commit 'origin/bfd'

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This commit is contained in:
Ondrej Zajicek 2013-11-22 02:43:41 +01:00
commit 0aeac9cb7f
50 changed files with 3674 additions and 268 deletions
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12
aclocal.m4 vendored
View File

@ -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"

10
conf/confbase.Y
View File

@ -73,6 +73,7 @@ CF_DECLS
%type <iface> ipa_scope
%type <i> expr bool pxlen
%type <i32> expr_us
%type <time> datetime
%type <a> ipa
%type <px> prefix prefix_or_ipa
@ -86,7 +87,7 @@ CF_DECLS
%left '!'
%nonassoc '.'
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO)
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US)
CF_GRAMMAR
@ -124,6 +125,13 @@ expr:
$$ = SYM_VAL($1).i; }
;
expr_us:
expr S { $$ = (u32) $1 * 1000000; }
| expr MS { $$ = (u32) $1 * 1000; }
| expr US { $$ = (u32) $1 * 1; }
;
/* expr_u16: expr { check_u16($1); $$ = $1; }; */
/* Switches */

33
configure.in
View File

@ -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 "$enable_ipv6" = yes ; then
ip=ipv6
SUFFIX=6
all_protocols=bgp,ospf,pipe,radv,rip,static
proto_radv=radv
else
ip=ipv4
SUFFIX=""
all_protocols=bgp,ospf,pipe,rip,static
fi
if test "$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"
@ -87,6 +83,23 @@ 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 "$bird_cflags_default" = yes ; then
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign, -Wall)
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
@ -183,6 +196,13 @@ fi
AC_SUBST(iproutedir)
all_protocols="$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

293
doc/bird.sgml
View File

@ -144,7 +144,10 @@ options. The most important ones are:
nonzero if there are some errors.
<tag>-s <m/name of communication socket/</tag>
use given filename for a socket for communications with the client, default is <it/prefix/<file>/var/run/bird.ctl</file>.
use given filename for a socket for communications with the client, default is <it/prefix/<file>/var/run/bird.ctl</file>.
<tag>-P <m/name of PID file/</tag>
create a PID file with given filename</file>.
<tag>-u <m/user/</tag>
drop privileges and use that user ID, see the next section for details.
@ -915,62 +918,63 @@ bird>
incompatible with each other (that is to prevent you from shooting in the foot).
<descrip>
<tag/bool/ This is a boolean type, it can have only two values, <cf/true/ and
<cf/false/. Boolean is the only type you can use in <cf/if/
statements.
<tag/bool/ This is a boolean type, it can have only two values,
<cf/true/ and <cf/false/. Boolean is the only type you can use in
<cf/if/ statements.
<tag/int/ This is a general integer type, you can expect it to store signed values from -2000000000
to +2000000000. Overflows are not checked. You can use <cf/0x1234/ syntax to write hexadecimal values.
<tag/int/ This is a general integer type, you can expect it to store
signed values from -2000000000 to +2000000000. Overflows are not
checked. You can use <cf/0x1234/ syntax to write hexadecimal values.
<tag/pair/ This is a pair of two short integers. Each component can have values from 0 to
65535. Literals of this type are written as <cf/(1234,5678)/. The same syntax can also be
used to construct a pair from two arbitrary integer expressions (for example <cf/(1+2,a)/).
<tag/pair/ This is a pair of two short integers. Each component can have
values from 0 to 65535. Literals of this type are written as
<cf/(1234,5678)/. The same syntax can also be used to construct a pair
from two arbitrary integer expressions (for example <cf/(1+2,a)/).
<tag/quad/ This is a dotted quad of numbers used to represent
router IDs (and others). Each component can have a value
from 0 to 255. Literals of this type are written like IPv4
addresses.
<tag/quad/ This is a dotted quad of numbers used to represent router IDs
(and others). Each component can have a value from 0 to 255. Literals
of this type are written like IPv4 addresses.
<tag/string/ This is a string of characters. There are no ways
to modify strings in filters. You can pass them between
functions, assign them to variables of type <cf/string/,
print such variables, use standard string comparison
operations (e.g. <cf/=, !=, &lt;, &gt;, &lt;=, &gt;=/), but
you can't concatenate two strings. String literals are
written as <cf/"This is a string constant"/. Additionaly
matching <cf/&tilde;/ operator could be used to match a
string value against a shell pattern (represented also as a
string).
<tag/string/ This is a string of characters. There are no ways to modify
strings in filters. You can pass them between functions, assign them
to variables of type <cf/string/, print such variables, use standard
string comparison operations (e.g. <cf/=, !=, &lt;, &gt;, &lt;=,
&gt;=/), but you can't concatenate two strings. String literals are
written as <cf/"This is a string constant"/. Additionaly matching
<cf/&tilde;/ operator could be used to match a string value against a
shell pattern (represented also as a string).
<tag/ip/ This type can hold a single IP address. Depending on the compile-time configuration of BIRD you are using, it
is either an IPv4 or IPv6 address. IP addresses are written in the standard notation (<cf/10.20.30.40/ or <cf/fec0:3:4::1/). You can apply special operator <cf>.mask(<M>num</M>)</cf>
on values of type ip. It masks out all but first <cf><M>num</M></cf> bits from the IP
address. So <cf/1.2.3.4.mask(8) = 1.0.0.0/ is true.
<tag/ip/ This type can hold a single IP address. Depending on the
compile-time configuration of BIRD you are using, it is either an IPv4
or IPv6 address. IP addresses are written in the standard notation
(<cf/10.20.30.40/ or <cf/fec0:3:4::1/). You can apply special
operator <cf>.mask(<M>num</M>)</cf> on values of type ip. It masks out
all but first <cf><M>num</M></cf> bits from the IP address. So
<cf/1.2.3.4.mask(8) = 1.0.0.0/ is true.
<tag/prefix/ This type can hold a network prefix consisting of IP address and prefix length. Prefix literals are written as
<cf><M>ipaddress</M>/<M>pxlen</M></cf>, or
<tag/prefix/ This type can hold a network prefix consisting of IP
address and prefix length. Prefix literals are written
as <cf><M>ipaddress</M>/<M>pxlen</M></cf>, or
<cf><m>ipaddress</m>/<m>netmask</m></cf>. There are two special
operators on prefixes:
<cf/.ip/ which extracts the IP address from the pair, and <cf/.len/, which separates prefix
length from the pair. So <cf>1.2.0.0/16.pxlen = 16</cf> is true.
operators on prefixes: <cf/.ip/ which extracts the IP address from the
pair, and <cf/.len/, which separates prefix length from the
pair. So <cf>1.2.0.0/16.pxlen = 16</cf> is true.
<tag/ec/ This is a specialized type used to represent BGP
extended community values. It is essentially a 64bit value,
literals of this type are usually written as <cf>(<m/kind/,
<m/key/, <m/value/)</cf>, where <cf/kind/ is a kind of
extended community (e.g. <cf/rt/ / <cf/ro/ for a route
target / route origin communities), the format and possible
values of <cf/key/ and <cf/value/ are usually integers, but
<tag/ec/ This is a specialized type used to represent BGP extended
community values. It is essentially a 64bit value, literals of this
type are usually written as <cf>(<m/kind/, <m/key/, <m/value/)</cf>,
where <cf/kind/ is a kind of extended community (e.g. <cf/rt/ /
<cf/ro/ for a route target / route origin communities), the format and
possible values of <cf/key/ and <cf/value/ are usually integers, but
it depends on the used kind. Similarly to pairs, ECs can be
constructed using expressions for <cf/key/ and
<cf/value/ parts, (e.g. <cf/(ro, myas, 3*10)/, where
<cf/myas/ is an integer variable).
constructed using expressions for <cf/key/ and <cf/value/ parts,
(e.g. <cf/(ro, myas, 3*10)/, where <cf/myas/ is an integer variable).
<tag/int|pair|quad|ip|prefix|ec|enum set/
Filters recognize four types of sets. Sets are similar to strings: you can pass them around
but you can't modify them. Literals of type <cf>int set</cf> look like <cf>
[ 1, 2, 5..7 ]</cf>. As you can see, both simple values and ranges are permitted in
sets.
<tag/int|pair|quad|ip|prefix|ec|enum set/ Filters recognize four types
of sets. Sets are similar to strings: you can pass them around but you
can't modify them. Literals of type <cf>int set</cf> look like <cf> [
1, 2, 5..7 ]</cf>. As you can see, both simple values and ranges are
permitted in sets.
For pair sets, expressions like <cf/(123,*)/ can be used to denote ranges (in
that case <cf/(123,0)..(123,65535)/). You can also use <cf/(123,5..100)/ for range
@ -1267,6 +1271,178 @@ 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
@ -1281,8 +1457,8 @@ 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).
@ -1435,7 +1611,15 @@ 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
@ -2020,6 +2204,7 @@ 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;;
@ -2294,6 +2479,14 @@ 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

129
filter/filter.c
View File

@ -59,41 +59,35 @@ adata_empty(struct linpool *pool, int l)
}
static void
pm_format(struct f_path_mask *p, byte *buf, unsigned int size)
pm_format(struct f_path_mask *p, buffer *buf)
{
byte *end = buf + size - 16;
buffer_puts(buf, "[= ");
while (p)
{
switch(p->kind)
{
if (buf > end)
{
strcpy(buf, " ...");
return;
}
case PM_ASN:
buffer_print(buf, "%u ", p->val);
break;
switch(p->kind)
{
case PM_ASN:
buf += bsprintf(buf, " %u", p->val);
break;
case PM_QUESTION:
buffer_puts(buf, "? ");
break;
case PM_QUESTION:
buf += bsprintf(buf, " ?");
break;
case PM_ASTERISK:
buffer_puts(buf, "* ");
break;
case PM_ASTERISK:
buf += bsprintf(buf, " *");
break;
case PM_ASN_EXPR:
buf += bsprintf(buf, " %u", f_eval_asn((struct f_inst *) p->val));
break;
}
p = p->next;
case PM_ASN_EXPR:
buffer_print(buf, "%u ", f_eval_asn((struct f_inst *) p->val));
break;
}
*buf = 0;
p = p->next;
}
buffer_puts(buf, "=]");
}
static inline int
@ -103,7 +97,7 @@ int_cmp(int i1, int i2)
}
static inline int
uint_cmp(unsigned int i1, unsigned int i2)
uint_cmp(uint i1, uint i2)
{
return (int)(i1 > i2) - (int)(i1 < i2);
}
@ -437,60 +431,32 @@ val_in_range(struct f_val v1, struct f_val v2)
return CMP_ERROR;
}
static void
tree_node_print(struct f_tree *t, char **sep)
{
if (t == NULL)
return;
tree_node_print(t->left, sep);
logn(*sep);
val_print(t->from);
if (val_compare(t->from, t->to) != 0)
{
logn( ".." );
val_print(t->to);
}
*sep = ", ";
tree_node_print(t->right, sep);
}
static void
tree_print(struct f_tree *t)
{
char *sep = "";
logn( "[" );
tree_node_print(t, &sep);
logn( "] " );
}
/*
* val_print - format filter value
* val_format - format filter value
*/
void
val_print(struct f_val v)
val_format(struct f_val v, buffer *buf)
{
char buf2[1024];
switch (v.type) {
case T_VOID: logn("(void)"); return;
case T_BOOL: logn(v.val.i ? "TRUE" : "FALSE"); return;
case T_INT: logn("%d", v.val.i); return;
case T_STRING: logn("%s", v.val.s); return;
case T_IP: logn("%I", v.val.px.ip); return;
case T_PREFIX: logn("%I/%d", v.val.px.ip, v.val.px.len); return;
case T_PAIR: logn("(%d,%d)", v.val.i >> 16, v.val.i & 0xffff); return;
case T_QUAD: logn("%R", v.val.i); return;
case T_EC: ec_format(buf2, v.val.ec); logn("%s", buf2); return;
case T_PREFIX_SET: trie_print(v.val.ti); return;
case T_SET: tree_print(v.val.t); return;
case T_ENUM: logn("(enum %x)%d", v.type, v.val.i); return;
case T_PATH: as_path_format(v.val.ad, buf2, 1000); logn("(path %s)", buf2); return;
case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); logn("(clist %s)", buf2); return;
case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); logn("(eclist %s)", buf2); return;
case T_PATH_MASK: pm_format(v.val.path_mask, buf2, 1000); logn("(pathmask%s)", buf2); return;
default: logn( "[unknown type %x]", v.type ); return;
switch (v.type)
{
case T_VOID: buffer_puts(buf, "(void)"); return;
case T_BOOL: buffer_puts(buf, v.val.i ? "TRUE" : "FALSE"); return;
case T_INT: buffer_print(buf, "%d", v.val.i); return;
case T_STRING: buffer_print(buf, "%s", v.val.s); return;
case T_IP: buffer_print(buf, "%I", v.val.px.ip); return;
case T_PREFIX: buffer_print(buf, "%I/%d", v.val.px.ip, v.val.px.len); return;
case T_PAIR: buffer_print(buf, "(%d,%d)", v.val.i >> 16, v.val.i & 0xffff); return;
case T_QUAD: buffer_print(buf, "%R", v.val.i); return;
case T_EC: ec_format(buf2, v.val.ec); buffer_print(buf, "%s", buf2); return;
case T_PREFIX_SET: trie_format(v.val.ti, buf); return;
case T_SET: tree_format(v.val.t, buf); return;
case T_ENUM: buffer_print(buf, "(enum %x)%d", v.type, v.val.i); return;
case T_PATH: as_path_format(v.val.ad, buf2, 1000); buffer_print(buf, "(path %s)", buf2); return;
case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); buffer_print(buf, "(clist %s)", buf2); return;
case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(eclist %s)", buf2); return;
case T_PATH_MASK: pm_format(v.val.path_mask, buf); return;
default: buffer_print(buf, "[unknown type %x]", v.type); return;
}
}
@ -498,6 +464,7 @@ static struct rte **f_rte;
static struct rta *f_old_rta;
static struct ea_list **f_tmp_attrs;
static struct linpool *f_pool;
static struct buffer f_buf;
static int f_flags;
static inline void f_rte_cow(void)
@ -786,7 +753,7 @@ interpret(struct f_inst *what)
break;
case 'p':
ONEARG;
val_print(v1);
val_format(v1, &f_buf);
break;
case '?': /* ? has really strange error value, so we can implement if ... else nicely :-) */
ONEARG;
@ -804,7 +771,7 @@ interpret(struct f_inst *what)
case P('p',','):
ONEARG;
if (what->a2.i == F_NOP || (what->a2.i != F_NONL && what->a1.p))
log_commit(*L_INFO);
log_commit(*L_INFO, &f_buf);
switch (what->a2.i) {
case F_QUITBIRD:
@ -1507,7 +1474,8 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
f_pool = tmp_pool;
f_flags = flags;
log_reset();
LOG_BUFFER_INIT(f_buf);
struct f_val res = interpret(filter->root);
if (f_old_rta) {
@ -1546,7 +1514,8 @@ f_eval(struct f_inst *expr, struct linpool *tmp_pool)
f_rte = NULL;
f_pool = tmp_pool;
log_reset();
LOG_BUFFER_INIT(f_buf);
return interpret(expr);
}

6
filter/filter.h
View File

@ -78,12 +78,13 @@ struct f_inst *f_generate_roa_check(struct symbol *sym, struct f_inst *prefix, s
struct f_tree *build_tree(struct f_tree *);
struct f_tree *find_tree(struct f_tree *t, struct f_val val);
int same_tree(struct f_tree *t1, struct f_tree *t2);
void tree_format(struct f_tree *t, buffer *buf);
struct f_trie *f_new_trie(linpool *lp);
void trie_add_prefix(struct f_trie *t, ip_addr px, int plen, int l, int h);
int trie_match_prefix(struct f_trie *t, ip_addr px, int plen);
int trie_same(struct f_trie *t1, struct f_trie *t2);
void trie_print(struct f_trie *t);
void trie_format(struct f_trie *t, buffer *buf);
void fprefix_get_bounds(struct f_prefix *px, int *l, int *h);
@ -118,7 +119,8 @@ int i_same(struct f_inst *f1, struct f_inst *f2);
int val_compare(struct f_val v1, struct f_val v2);
int val_same(struct f_val v1, struct f_val v2);
void val_print(struct f_val v);
void val_format(struct f_val v, buffer *buf);
#define F_NOP 0
#define F_NONL 1

2
filter/test.conf
View File

@ -106,7 +106,7 @@ eclist el2;
print "5 = ", p2.len;
print "Delete 3: ", delete(p2, 3);
print "Filter 1-3: ", filter(p2, [1..3]);
pm1 = [= 1 2 * 3 4 5 =];
p2 = prepend( + empty +, 5 );
p2 = prepend( p2, 4 );

34
filter/tree.c
View File

@ -137,3 +137,37 @@ same_tree(struct f_tree *t1, struct f_tree *t2)
return 0;
return 1;
}
static void
tree_node_format(struct f_tree *t, buffer *buf)
{
if (t == NULL)
return;
tree_node_format(t->left, buf);
val_format(t->from, buf);
if (val_compare(t->from, t->to) != 0)
{
buffer_puts(buf, "..");
val_format(t->to, buf);
}
buffer_puts(buf, ", ");
tree_node_format(t->right, buf);
}
void
tree_format(struct f_tree *t, buffer *buf)
{
buffer_puts(buf, "[");
tree_node_format(t, buf);
/* Undo last separator */
if (buf->pos[-1] != '[')
buf->pos -= 2;
buffer_puts(buf, "]");
}

38
filter/trie.c
View File

@ -265,37 +265,37 @@ trie_same(struct f_trie *t1, struct f_trie *t2)
}
static void
trie_node_print(struct f_trie_node *t, char **sep)
trie_node_format(struct f_trie_node *t, buffer *buf)
{
if (t == NULL)
return;
if (ipa_nonzero(t->accept))
{
logn("%s%I/%d{%I}", *sep, t->addr, t->plen, t->accept);
*sep = ", ";
}
buffer_print(buf, "%I/%d{%I}, ", t->addr, t->plen, t->accept);
trie_node_print(t->c[0], sep);
trie_node_print(t->c[1], sep);
trie_node_format(t->c[0], buf);
trie_node_format(t->c[1], buf);
}
/**
* trie_print
* @t: trie to be printed
* trie_format
* @t: trie to be formatted
* @buf: destination buffer
*
* Prints the trie to the log buffer.
* Prints the trie to the supplied buffer.
*/
void
trie_print(struct f_trie *t)
trie_format(struct f_trie *t, buffer *buf)
{
char *sep = "";
logn("[");
buffer_puts(buf, "[");
if (t->zero)
{
logn("%I/%d", IPA_NONE, 0);
sep = ", ";
}
trie_node_print(&t->root, &sep);
logn("]");
buffer_print(buf, "%I/%d", IPA_NONE, 0);
trie_node_format(&t->root, buf);
/* Undo last separator */
if (buf->pos[-1] != '[')
buf->pos -= 2;
buffer_puts(buf, "]");
}

54
lib/birdlib.h
View File

@ -10,6 +10,7 @@
#define _BIRD_BIRDLIB_H_
#include "timer.h"
#include "alloca.h"
/* Ugly structure offset handling macros */
@ -19,12 +20,14 @@
/* Utility macros */
#ifdef PARSER
#define _MIN(a,b) (((a)<(b))?(a):(b))
#define _MAX(a,b) (((a)>(b))?(a):(b))
#else
#define MIN(a,b) (((a)<(b))?(a):(b))
#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
#define ABS(a) ((a)>=0 ? (a) : -(a))
@ -40,24 +43,61 @@
#define IP_VERSION 6
#endif
/* Macros for gcc attributes */
#define NORET __attribute__((noreturn))
#define UNUSED __attribute__((unused))
/* Microsecond time */
typedef s64 btime;
#define _S *1000000
#define _MS *1000
#define _US *1
#define TO_S /1000000
#define TO_MS /1000
#define TO_US /1
#ifndef PARSER
#define S _S
#define MS _MS
#define US _US
#endif
/* Logging and dying */
typedef struct buffer {
byte *start;
byte *pos;
byte *end;
} buffer;
#define STACK_BUFFER_INIT(buf,size) \
do { \
buf.start = alloca(size); \
buf.pos = buf.start; \
buf.end = buf.start + size; \
} while(0)
#define LOG_BUFFER_INIT(buf) \
STACK_BUFFER_INIT(buf, LOG_BUFFER_SIZE)
#define LOG_BUFFER_SIZE 1024
struct rate_limit {
bird_clock_t timestamp;
int count;
};
#define log log_msg
void log_reset(void);
void log_commit(int class);
void log_commit(int class, buffer *buf);
void log_msg(char *msg, ...);
void log_rl(struct rate_limit *rl, char *msg, ...);
void logn(char *msg, ...);
void die(char *msg, ...) NORET;
void bug(char *msg, ...) NORET;

35
lib/buffer.h Normal file
View File

@ -0,0 +1,35 @@
#define BUFFER(type) struct { type *data; uint used, size; }
#define BUFFER_SIZE(v) ((v).size * sizeof(* (v).data))
#define BUFFER_INIT(v,pool,isize) \
({ \
(v).used = 0; \
(v).size = (isize); \
(v).data = mb_alloc(pool, BUFFER_SIZE(v)); \
})
#define BUFFER_SET(v,nsize) \
({ \
(v).used = (nsize); \
if ((v).used > (v).size) \
buffer_realloc((void **) &((v).data), &((v).size), (v).used, sizeof(* (v).data)); \
})
#define BUFFER_INC(v,step) \
({ \
uint _o = (v).used; \
BUFFER_SET(v, (v).used + (step)); \
(v).data + _o; \
})
#define BUFFER_DEC(v,step) ({ (v).used -= (step); })
#define BUFFER_PUSH(v) (*BUFFER_INC(v,1))
#define BUFFER_POP(v) BUFFER_DEC(v,1)
#define BUFFER_FLUSH(v) ({ (v).used = 0; })

123
lib/hash.h Normal file
View File

@ -0,0 +1,123 @@
#define HASH(type) struct { type **data; uint count, order; }
#define HASH_TYPE(v) typeof(** (v).data)
#define HASH_SIZE(v) (1 << (v).order)
#define HASH_MASK(v) ((1 << (v).order)-1)
#define HASH_INIT(v,pool,init_order) \
({ \
(v).count = 0; \
(v).order = (init_order); \
(v).data = mb_allocz(pool, HASH_SIZE(v) * sizeof(* (v).data)); \
})
#define HASH_FIND(v,id,key...) \
({ \
uint _h = id##_FN((key)) & HASH_MASK(v); \
HASH_TYPE(v) *_n = (v).data[_h]; \
while (_n && !id##_EQ(id##_KEY(_n), (key))) \
_n = id##_NEXT(_n); \
_n; \
})
#define HASH_INSERT(v,id,node) \
({ \
uint _h = id##_FN(id##_KEY((node))) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
id##_NEXT(node) = *_nn; \
*_nn = node; \
(v).count++; \
})
#define HASH_DO_REMOVE(v,id,_nn) \
({ \
HASH_TYPE(v) *_n = *_nn; \
if (_n) \
{ \
*_nn = id##_NEXT(_n); \
(v).count--; \
} \
_n; \
})
#define HASH_DELETE(v,id,key...) \
({ \
uint _h = id##_FN((key)) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
\
while ((*_nn) && !id##_EQ(id##_KEY((*_nn)), (key))) \
_nn = &(id##_NEXT((*_nn))); \
\
HASH_DO_REMOVE(v,id,_nn); \
})
#define HASH_REMOVE(v,id,node) \
({ \
uint _h = id##_FN(id##_KEY((node))) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
\
while ((*_nn) && (*_nn != (node))) \
_nn = &(id##_NEXT((*_nn))); \
\
HASH_DO_REMOVE(v,id,_nn); \
})
#define HASH_REHASH(v,id,pool,step) \
({ \
HASH_TYPE(v) *_n, *_n2, **_od; \
uint _i, _s; \
\
_s = HASH_SIZE(v); \
_od = (v).data; \
(v).count = 0; \
(v).order += (step); \
(v).data = mb_allocz(pool, HASH_SIZE(v) * sizeof(* (v).data)); \
\
for (_i = 0; _i < _s; _i++) \
for (_n = _od[_i]; _n && (_n2 = id##_NEXT(_n), 1); _n = _n2) \
HASH_INSERT(v, id, _n); \
\
mb_free(_od); \
})
#define HASH_DEFINE_REHASH_FN(id, type) \
static void id##_REHASH_FN(void *v, pool *p, int step) \
{ HASH_REHASH(* (HASH(type) *) v, id, p, step); }
#define HASH_TRY_REHASH_UP(v,id,pool) \
({ \
if (((v).order < id##_REHASH_MAX) && ((v).count > HASH_SIZE(v))) \
id##_REHASH_FN(&v, pool, 1); \
})
#define HASH_TRY_REHASH_DOWN(v,id,pool) \
({ \
if (((v).order > id##_REHASH_MIN) && ((v).count < HASH_SIZE(v)/2)) \
id##_REHASH_FN(&v, pool, -1); \
})
#define HASH_WALK(v,next,n) \
do { \
HASH_TYPE(v) *n; \
uint _i; \
uint _s = HASH_SIZE(v); \
for (_i = 0; _i < _s; _i++) \
for (n = (v).data[_i]; n; n = n->next)
#define HASH_WALK_END } while (0)
#define HASH_WALK_DELSAFE(v,next,n) \
do { \
HASH_TYPE(v) *n, *_next; \
uint _i; \
uint _s = HASH_SIZE(v); \
for (_i = 0; _i < _s; _i++) \
for (n = (v).data[_i]; n && (_next = n->next, 1); n = _next)
#define HASH_WALK_DELSAFE_END } while (0)

156
lib/heap.h Normal file
View File

@ -0,0 +1,156 @@
/*
* UCW Library -- Universal Heap Macros
*
* (c) 2001 Martin Mares <mj@ucw.cz>
* (c) 2005 Tomas Valla <tom@ucw.cz>
*
* This software may be freely distributed and used according to the terms
* of the GNU Lesser General Public License.
*/
/**
* [[intro]]
* Introduction
* ------------
*
* Binary heap is a simple data structure, which for example supports efficient insertions, deletions
* and access to the minimal inserted item. We define several macros for such operations.
* Note that because of simplicity of heaps, we have decided to define direct macros instead
* of a <<generic:,macro generator>> as for several other data structures in the Libucw.
*
* A heap is represented by a number of elements and by an array of values. Beware that we
* index this array from one, not from zero as do the standard C arrays.
*
* Most macros use these parameters:
*
* - @type - the type of elements
* - @num - a variable (signed or unsigned integer) with the number of elements
* - @heap - a C array of type @type; the heap is stored in `heap[1] .. heap[num]`; `heap[0]` is unused
* - @less - a callback to compare two element values; `less(x, y)` shall return a non-zero value iff @x is lower than @y
* - @swap - a callback to swap two array elements; `swap(heap, i, j, t)` must swap `heap[i]` with `heap[j]` with possible help of temporary variable @t (type @type).
*
* A valid heap must follow these rules:
*
* - `num >= 0`
* - `heap[i] >= heap[i / 2]` for each `i` in `[2, num]`
*
* The first element `heap[1]` is always lower or equal to all other elements.
*
* [[macros]]
* Macros
* ------
*/
/* For internal usage. */
#define HEAP_BUBBLE_DOWN_J(heap,num,less,swap) \
for (;;) \
{ \
_l = 2*_j; \
if (_l > num) \
break; \
if (less(heap[_j],heap[_l]) && (_l == num || less(heap[_j],heap[_l+1]))) \
break; \
if (_l != num && less(heap[_l+1],heap[_l])) \
_l++; \
swap(heap,_j,_l,x); \
_j = _l; \
}
/* For internal usage. */
#define HEAP_BUBBLE_UP_J(heap,num,less,swap) \
while (_j > 1) \
{ \
_u = _j/2; \
if (less(heap[_u], heap[_j])) \
break; \
swap(heap,_u,_j,x); \
_j = _u; \
}
/**
* Shuffle the unordered array @heap of @num elements to become a valid heap. The time complexity is linear.
**/
#define HEAP_INIT(heap,num,type,less,swap) \
do { \
uint _i = num; \
uint _j, _l; \
type x; \
while (_i >= 1) \
{ \
_j = _i; \
HEAP_BUBBLE_DOWN_J(heap,num,less,swap) \
_i--; \
} \
} while(0)
/**
* Delete the minimum element `heap[1]` in `O(log(n))` time.
* The removed value is moved just after the resulting heap (`heap[num + 1]`).
**/
#define HEAP_DELMIN(heap,num,type,less,swap) \
do { \
uint _j, _l; \
type x; \
swap(heap,1,num,x); \
num--; \
_j = 1; \
HEAP_BUBBLE_DOWN_J(heap,num,less,swap); \
} while(0)
/**
* Insert `heap[num]` in `O(log(n))` time. The value of @num must be increased before.
**/
#define HEAP_INSERT(heap,num,type,less,swap) \
do { \
uint _j, _u; \
type x; \
_j = num; \
HEAP_BUBBLE_UP_J(heap,num,less,swap); \
} while(0)
/**
* If you need to increase the value of `heap[pos]`, just do it and then call this macro to rebuild the heap.
* Only `heap[pos]` can be changed, the rest of the array must form a valid heap.
* The time complexity is `O(log(n))`.
**/
#define HEAP_INCREASE(heap,num,type,less,swap,pos) \
do { \
uint _j, _l; \
type x; \
_j = pos; \
HEAP_BUBBLE_DOWN_J(heap,num,less,swap); \
} while(0)
/**
* If you need to decrease the value of `heap[pos]`, just do it and then call this macro to rebuild the heap.
* Only `heap[pos]` can be changed, the rest of the array must form a valid heap.
* The time complexity is `O(log(n))`.
**/
#define HEAP_DECREASE(heap,num,type,less,swap,pos) \
do { \
uint _j, _u; \
type x; \
_j = pos; \
HEAP_BUBBLE_UP_J(heap,num,less,swap); \
} while(0)
/**
* Delete `heap[pos]` in `O(log(n))` time.
**/
#define HEAP_DELETE(heap,num,type,less,swap,pos) \
do { \
uint _j, _l, _u; \
type x; \
_j = pos; \
swap(heap,_j,num,x); \
num--; \
if (less(heap[_j], heap[num+1])) \
HEAP_BUBBLE_UP_J(heap,num,less,swap) \
else \
HEAP_BUBBLE_DOWN_J(heap,num,less,swap); \
} while(0)
/**
* Default swapping macro.
**/
#define HEAP_SWAP(heap,a,b,t) (t=heap[a], heap[a]=heap[b], heap[b]=t)

40
lib/lists.c
View File

@ -100,6 +100,46 @@ rem_node(node *n)
x->prev = z;
}
/**
* rem2_node - remove a node from a list, with cleanup
* @n: node to be removed
*
* Removes a node @n from the list it's linked in and resets its pointers to NULL.
* Useful if you want to distinguish between linked and unlinked nodes.
*/
LIST_INLINE void
rem2_node(node *n)
{
node *z = n->prev;
node *x = n->next;
z->next = x;
x->prev = z;
n->next = NULL;
n->prev = NULL;
}
/**
* replace_node - replace a node in a list with another one
* @old: node to be removed
* @new: node to be inserted
*
* Replaces node @old in the list it's linked in with node @new. Node
* @old may be a copy of the original node, which is not accessed
* through the list. The function could be called with @old == @new,
* which just fixes neighbors' pointers in the case that the node
* was reallocated.
*/
LIST_INLINE void
replace_node(node *old, node *new)
{
old->next->prev = new;
old->prev->next = new;
new->prev = old->prev;
new->next = old->next;
}
/**
* init_list - create an empty list
* @l: list

1
lib/lists.h
View File

@ -51,6 +51,7 @@ typedef struct list { /* In fact two overlayed nodes */
void add_tail(list *, node *);
void add_head(list *, node *);
void rem_node(node *);
void rem2_node(node *);
void add_tail_list(list *, list *);
void init_list(list *);
void insert_node(node *, node *);

39
lib/printf.c
View File

@ -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;
@ -410,3 +410,40 @@ int bsnprintf(char * buf, int size, const char *fmt, ...)
va_end(args);
return i;
}
int
buffer_vprint(buffer *buf, const char *fmt, va_list args)
{
int i = bvsnprintf((char *) buf->pos, buf->end - buf->pos, fmt, args);
buf->pos = (i >= 0) ? (buf->pos + i) : buf->end;
return i;
}
int
buffer_print(buffer *buf, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i=bvsnprintf((char *) buf->pos, buf->end - buf->pos, fmt, args);
va_end(args);
buf->pos = (i >= 0) ? (buf->pos + i) : buf->end;
return i;
}
void
buffer_puts(buffer *buf, const char *str)
{
byte *bp = buf->pos;
byte *be = buf->end;
while (bp < be && *str)
*bp++ = *str++;
if (bp < be)
*bp = 0;
buf->pos = bp;
}

32
lib/resource.c
View File

@ -220,7 +220,8 @@ ralloc(pool *p, struct resclass *c)
bzero(r, c->size);
r->class = c;
add_tail(&p->inside, &r->n);
if (p)
add_tail(&p->inside, &r->n);
return r;
}
@ -366,21 +367,21 @@ mb_allocz(pool *p, unsigned size)
/**
* mb_realloc - reallocate a memory block
* @p: pool
* @m: memory block
* @size: new size of the block
*
* mb_realloc() changes the size of the memory block @m to a given size.
* The contents will be unchanged to the minimum of the old and new sizes;
* newly allocated memory will be uninitialized. If @m is NULL, the call
* is equivalent to mb_alloc(@p, @size).
* newly allocated memory will be uninitialized. Contrary to realloc()
* behavior, @m must be non-NULL, because the resource pool is inherited
* from it.
*
* Like mb_alloc(), mb_realloc() also returns a pointer to the memory
* chunk , not to the resource, hence you have to free it using
* chunk, not to the resource, hence you have to free it using
* mb_free(), not rfree().
*/
void *
mb_realloc(pool *p, void *m, unsigned size)
mb_realloc(void *m, unsigned size)
{
struct mblock *ob = NULL;
@ -392,9 +393,7 @@ mb_realloc(pool *p, void *m, unsigned size)
}
struct mblock *b = xrealloc(ob, sizeof(struct mblock) + size);
b->r.class = &mb_class;
add_tail(&p->inside, &b->r.n);
replace_node(&b->r.n, &b->r.n);
b->size = size;
return b->data;
}
@ -413,3 +412,18 @@ mb_free(void *m)
rfree(b);
}
#define STEP_UP(x) ((x) + (x)/2 + 4)
void
buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size)
{
unsigned nsize = MIN(*size, need);
while (nsize < need)
nsize = STEP_UP(nsize);
*buf = mb_realloc(*buf, nsize * item_size);
*size = nsize;
}

6
lib/resource.h
View File

@ -52,7 +52,7 @@ extern pool root_pool;
void *mb_alloc(pool *, unsigned size);
void *mb_allocz(pool *, unsigned size);
void *mb_realloc(pool *p, void *m, unsigned size);
void *mb_realloc(void *m, unsigned size);
void mb_free(void *);
/* Memory pools with linear allocation */
@ -78,6 +78,9 @@ void sl_free(slab *, void *);
* outside resource manager and possibly sysdep code.
*/
void buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size);
#ifdef HAVE_LIBDMALLOC
/*
* The standard dmalloc macros tend to produce lots of namespace
@ -103,3 +106,4 @@ void *xrealloc(void *, unsigned);
#endif
#endif

2
lib/socket.h
View File

@ -44,6 +44,7 @@ typedef struct birdsock {
/* laddr and lifindex are valid only if SKF_LADDR_RX flag is set to request it */
int fd; /* System-dependent data */
int index; /* Index in poll buffer */
node n;
void *rbuf_alloc, *tbuf_alloc;
char *password; /* Password for MD5 authentication */
@ -91,6 +92,7 @@ extern int sk_priority_control; /* Suggested priority for control traffic, shoul
#define SKF_LADDR_TX 4 /* Allow to specify local address for TX packets */
#define SKF_TTL_RX 8 /* Report TTL / Hop Limit for RX packets */
#define SKF_THREAD 0x100 /* Socked used in thread, Do not add to main loop */
/*
* Socket types SA SP DA DP IF TTL SendTo (?=may, -=must not, *=must)

4
lib/string.h
View File

@ -17,6 +17,10 @@ int bvsprintf(char *str, const char *fmt, va_list args);
int bsnprintf(char *str, int size, const char *fmt, ...);
int bvsnprintf(char *str, int size, const char *fmt, va_list args);
int buffer_vprint(buffer *buf, const char *fmt, va_list args);
int buffer_print(buffer *buf, const char *fmt, ...);
void buffer_puts(buffer *buf, const char *str);
int patmatch(byte *pat, byte *str);
#endif

51
nest/bfd.h Normal file
View File

@ -0,0 +1,51 @@
/*
* BIRD -- Bidirectional Forwarding Detection (BFD)
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_NBFD_H_
#define _BIRD_NBFD_H_
#include "lib/lists.h"
#include "lib/resource.h"
struct bfd_session;
struct bfd_request {
resource r;
node n;
ip_addr addr;
ip_addr local;
struct iface *iface;
void (*hook)(struct bfd_request *);
void *data;
struct bfd_session *session;
u8 state;
u8 diag;
u8 old_state;
u8 down;
};
#ifdef CONFIG_BFD
struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, void (*hook)(struct bfd_request *), void *data);
static inline void cf_check_bfd(int use) { }
#else
static inline struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, void (*hook)(struct bfd_request *), void *data) { return NULL; }
static inline void cf_check_bfd(int use) { if (use) cf_error("BFD not available"); }
#endif /* CONFIG_BFD */
#endif /* _BIRD_NBFD_H_ */

10
nest/cmds.c
View File

@ -92,13 +92,10 @@ cmd_show_memory(void)
cli_msg(0, "");
}
extern const char *log_buffer_ptr;
void
cmd_eval(struct f_inst *expr)
{
struct f_val v = f_eval(expr, this_cli->parser_pool);
log_reset();
if (v.type == T_RETURN)
{
@ -106,7 +103,8 @@ cmd_eval(struct f_inst *expr)
return;
}
val_print(v);
cli_msg(23, "%s", log_buffer_ptr);
log_reset();
buffer buf;
LOG_BUFFER_INIT(buf);
val_format(v, &buf);
cli_msg(23, "%s", buf.start);
}

8
nest/proto.c
View File

@ -699,6 +699,9 @@ 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
*
@ -736,6 +739,11 @@ protos_build(void)
#ifdef CONFIG_BGP
proto_build(&proto_bgp);
#endif
#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_flush_event->hook = proto_flush_loop;

8
nest/protocol.h
View File

@ -75,7 +75,7 @@ void protos_dump_all(void);
extern struct protocol
proto_device, proto_radv, proto_rip, proto_static,
proto_ospf, proto_pipe, proto_bgp;
proto_ospf, proto_pipe, proto_bgp, proto_bfd;
/*
* Routing Protocol Instance
@ -358,6 +358,12 @@ void proto_notify_state(struct proto *p, unsigned state);
#define D_EVENTS 16 /* Protocol events */
#define D_PACKETS 32 /* Packets sent/received */
#ifndef PARSER
#define TRACE(flags, msg, args...) \
do { if (p->p.debug & flags) log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
#endif
/*
* MRTDump flags
*/

1
proto/Doc
View File

@ -1,4 +1,5 @@
H Protocols
C bfd
C bgp
C ospf
C pipe

1
proto/bfd/Doc Normal file
View File

@ -0,0 +1 @@
S bfd.c

5
proto/bfd/Makefile Normal file
View File

@ -0,0 +1,5 @@
source=bfd.c packets.c io.c
root-rel=../../
dir-name=proto/bfd
include ../../Rules

1114
proto/bfd/bfd.c Normal file
View File

File diff suppressed because it is too large Load Diff

191
proto/bfd/bfd.h Normal file
View File

@ -0,0 +1,191 @@
/*
* BIRD -- Bidirectional Forwarding Detection (BFD)
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BFD_H_
#define _BIRD_BFD_H_
#include <pthread.h>
#include "nest/bird.h"
#include "nest/cli.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "conf/conf.h"
#include "lib/hash.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "lib/string.h"
#include "nest/bfd.h"
#include "io.h"
#define BFD_CONTROL_PORT 3784
#define BFD_ECHO_PORT 3785
#define BFD_MULTI_CTL_PORT 4784
#define BFD_DEFAULT_MIN_RX_INT (10 _MS)
#define BFD_DEFAULT_MIN_TX_INT (100 _MS)
#define BFD_DEFAULT_IDLE_TX_INT (1 _S)
#define BFD_DEFAULT_MULTIPLIER 5
struct bfd_iface_config;
struct bfd_config
{
struct proto_config c;
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_iface_config
{
struct iface_patt i;
u32 min_rx_int;
u32 min_tx_int;
u32 idle_tx_int;
u8 multiplier;
u8 passive;
};
struct bfd_neighbor
{
node n;
ip_addr addr;
ip_addr local;
struct iface *iface;
struct neighbor *neigh;
struct bfd_request *req;
u8 multihop;
u8 active;
};
struct bfd_proto
{
struct proto p;
struct birdloop *loop;
pool *tpool;
pthread_spinlock_t lock;
node bfd_node;
slab *session_slab;
HASH(struct bfd_session) session_hash_id;
HASH(struct bfd_session) session_hash_ip;
sock *notify_rs;
sock *notify_ws;
list notify_list;
sock *rx_1;
sock *rx_m;
list iface_list;
};
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 */
u8 opened_unused;
u8 passive;
u8 poll_active;
u8 poll_scheduled;
u8 loc_state;
u8 rem_state;
u8 loc_diag;
u8 rem_diag;
u32 loc_id; /* Local session ID (local discriminator) */
u32 rem_id; /* Remote session ID (remote discriminator) */
u32 des_min_tx_int; /* Desired min rx interval, local option */
u32 des_min_tx_new; /* Used for des_min_tx_int change */
u32 req_min_rx_int; /* Required min tx interval, local option */
u32 req_min_rx_new; /* Used for req_min_rx_int change */
u32 rem_min_tx_int; /* Last received des_min_tx_int */
u32 rem_min_rx_int; /* Last received req_min_rx_int */
u8 demand_mode; /* Currently unused */
u8 rem_demand_mode;
u8 detect_mult; /* Announced detect_mult, local option */
u8 rem_detect_mult; /* Last received detect_mult */
btime last_tx; /* Time of last sent periodic control packet */
btime last_rx; /* Time of last received valid control packet */
timer2 *tx_timer; /* Periodic control packet timer */
timer2 *hold_timer; /* Timer for session down detection time */
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 */
};
extern const char *bfd_state_names[];
#define BFD_STATE_ADMIN_DOWN 0
#define BFD_STATE_DOWN 1
#define BFD_STATE_INIT 2
#define BFD_STATE_UP 3
#define BFD_DIAG_NOTHING 0
#define BFD_DIAG_TIMEOUT 1
#define BFD_DIAG_ECHO_FAILED 2
#define BFD_DIAG_NEIGHBOR_DOWN 3
#define BFD_DIAG_FWD_RESET 4
#define BFD_DIAG_PATH_DOWN 5
#define BFD_DIAG_C_PATH_DOWN 6
#define BFD_DIAG_ADMIN_DOWN 7
#define BFD_DIAG_RC_PATH_DOWN 8
#define BFD_POLL_TX 1
#define BFD_POLL_RX 2
#define BFD_FLAGS 0x3f
#define BFD_FLAG_POLL (1 << 5)
#define BFD_FLAG_FINAL (1 << 4)
#define BFD_FLAG_CPI (1 << 3)
#define BFD_FLAG_AP (1 << 2)
#define BFD_FLAG_DEMAND (1 << 1)
#define BFD_FLAG_MULTIPOINT (1 << 0)
static inline void bfd_lock_sessions(struct bfd_proto *p) { pthread_spin_lock(&p->lock); }
static inline void bfd_unlock_sessions(struct bfd_proto *p) { pthread_spin_unlock(&p->lock); }
/* bfd.c */
struct bfd_session * bfd_find_session_by_id(struct bfd_proto *p, u32 id);
struct bfd_session * bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr);
void bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_tx_int, u32 old_rx_int);
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);
sock * bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa);
#endif /* _BIRD_BFD_H_ */

138
proto/bfd/config.Y Normal file
View File

@ -0,0 +1,138 @@
/*
* BIRD -- Router Advertisement Configuration
*
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "proto/bfd/bfd.h"
CF_DEFINES
#define BFD_CFG ((struct bfd_config *) this_proto)
#define BFD_IFACE ((struct bfd_iface_config *) this_ipatt)
#define BFD_NEIGHBOR this_bfd_neighbor
static struct bfd_neighbor *this_bfd_neighbor;
extern struct bfd_config *bfd_cf;
CF_DECLS
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
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
| INTERFACE bfd_iface
| MULTIHOP bfd_multihop
| NEIGHBOR bfd_neighbor
;
bfd_proto_opts:
/* empty */
| bfd_proto_opts bfd_proto_item ';'
;
bfd_proto:
bfd_proto_start proto_name '{' bfd_proto_opts '}';
bfd_iface_start:
{
this_ipatt = cfg_allocz(sizeof(struct bfd_iface_config));
init_list(&this_ipatt->ipn_list);
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_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_iface_opts:
/* empty */
| bfd_iface_opts bfd_iface_item ';'
;
bfd_iface_opt_list:
/* empty */
| '{' bfd_iface_opts '}'
;
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:
/* empty */ { $$ = NULL; }
| '%' SYM { $$ = if_get_by_name($2->name); }
| DEV TEXT { $$ = if_get_by_name($2); }
;
bfd_neigh_local:
/* empty */ { $$ = IPA_NONE; }
| LOCAL ipa { $$ = $2; }
;
bfd_neigh_multihop:
/* empty */ { $$ = 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 = $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");
};
CF_CLI(SHOW BFD SESSIONS, optsym, [<name>], [[Show information about BFD sessions]])
{ bfd_show_sessions(proto_get_named($4, &proto_bfd)); };
CF_CODE
CF_END

768
proto/bfd/io.c Normal file
View File

@ -0,0 +1,768 @@
/*
* BIRD -- I/O and event loop
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <time.h>
#include <sys/time.h>
#include "nest/bird.h"
#include "proto/bfd/io.h"
#include "lib/buffer.h"
#include "lib/heap.h"
#include "lib/lists.h"
#include "lib/resource.h"
#include "lib/event.h"
#include "lib/socket.h"
struct birdloop
{
pool *pool;
pthread_t thread;
pthread_mutex_t mutex;
btime last_time;
btime real_time;
u8 use_monotonic_clock;
u8 stop_called;
u8 poll_active;
u8 wakeup_masked;
int wakeup_fds[2];
BUFFER(timer2 *) timers;
list event_list;
list sock_list;
uint sock_num;
BUFFER(sock *) poll_sk;
BUFFER(struct pollfd) poll_fd;
u8 poll_changed;
u8 close_scheduled;
};
/*
* Current thread context
*/
static pthread_key_t current_loop_key;
static inline struct birdloop *
birdloop_current(void)
{
return pthread_getspecific(current_loop_key);
}
static inline void
birdloop_set_current(struct birdloop *loop)
{
pthread_setspecific(current_loop_key, loop);
}
static inline void
birdloop_init_current(void)
{
pthread_key_create(&current_loop_key, NULL);
}
/*
* Time clock
*/
static void times_update_alt(struct birdloop *loop);
static void
times_init(struct birdloop *loop)
{
struct timespec ts;
int rv;
rv = clock_gettime(CLOCK_MONOTONIC, &ts);
if (rv < 0)
{
log(L_WARN "Monotonic clock is missing");
loop->use_monotonic_clock = 0;
loop->last_time = 0;
loop->real_time = 0;
times_update_alt(loop);
return;
}
if ((ts.tv_sec < 0) || (((s64) ts.tv_sec) > ((s64) 1 << 40)))
log(L_WARN "Monotonic clock is crazy");
loop->use_monotonic_clock = 1;
loop->last_time = ((s64) ts.tv_sec S) + (ts.tv_nsec / 1000);
loop->real_time = 0;
}
static void
times_update_pri(struct birdloop *loop)
{
struct timespec ts;
int rv;
rv = clock_gettime(CLOCK_MONOTONIC, &ts);
if (rv < 0)
die("clock_gettime: %m");
btime new_time = ((s64) ts.tv_sec S) + (ts.tv_nsec / 1000);
if (new_time < loop->last_time)
log(L_ERR "Monotonic clock is broken");
loop->last_time = new_time;
loop->real_time = 0;
}
static void
times_update_alt(struct birdloop *loop)
{
struct timeval tv;
int rv;
rv = gettimeofday(&tv, NULL);
if (rv < 0)
die("gettimeofday: %m");
btime new_time = ((s64) tv.tv_sec S) + tv.tv_usec;
btime delta = new_time - loop->real_time;
if ((delta < 0) || (delta > (60 S)))
{
if (loop->real_time)
log(L_WARN "Time jump, delta %d us", (int) delta);
delta = 100 MS;
}
loop->last_time += delta;
loop->real_time = new_time;
}
static void
times_update(struct birdloop *loop)
{
if (loop->use_monotonic_clock)
times_update_pri(loop);
else
times_update_alt(loop);
}
btime
current_time(void)
{
return birdloop_current()->last_time;
}
/*
* Wakeup code for birdloop
*/
static void
pipe_new(int *pfds)
{
int rv = pipe(pfds);
if (rv < 0)
die("pipe: %m");
if (fcntl(pfds[0], F_SETFL, O_NONBLOCK) < 0)
die("fcntl(O_NONBLOCK): %m");
if (fcntl(pfds[1], F_SETFL, O_NONBLOCK) < 0)
die("fcntl(O_NONBLOCK): %m");
}
void
pipe_drain(int fd)
{
char buf[64];
int rv;
try:
rv = read(fd, buf, 64);
if (rv < 0)
{
if (errno == EINTR)
goto try;
if (errno == EAGAIN)
return;
die("wakeup read: %m");
}
if (rv == 64)
goto try;
}
void
pipe_kick(int fd)
{
u64 v = 1;
int rv;
try:
rv = write(fd, &v, sizeof(u64));
if (rv < 0)
{
if (errno == EINTR)
goto try;
if (errno == EAGAIN)
return;
die("wakeup write: %m");
}
}
static inline void
wakeup_init(struct birdloop *loop)
{
pipe_new(loop->wakeup_fds);
}
static inline void
wakeup_drain(struct birdloop *loop)
{
pipe_drain(loop->wakeup_fds[0]);
}
static inline void
wakeup_do_kick(struct birdloop *loop)
{
pipe_kick(loop->wakeup_fds[1]);
}
static inline void
wakeup_kick(struct birdloop *loop)
{
if (!loop->wakeup_masked)
wakeup_do_kick(loop);
else
loop->wakeup_masked = 2;
}
/*
* Events
*/
static inline uint
events_waiting(struct birdloop *loop)
{
return !EMPTY_LIST(loop->event_list);
}
static inline void
events_init(struct birdloop *loop)
{
init_list(&loop->event_list);
}
static void
events_fire(struct birdloop *loop)
{
times_update(loop);
ev_run_list(&loop->event_list);
}
void
ev2_schedule(event *e)
{
struct birdloop *loop = birdloop_current();
if (loop->poll_active && EMPTY_LIST(loop->event_list))
wakeup_kick(loop);
if (e->n.next)
rem_node(&e->n);
add_tail(&loop->event_list, &e->n);
}
/*
* 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)
{ return loop->timers.used - 1; }
static inline timer2 *timers_first(struct birdloop *loop)
{ return (loop->timers.used > 1) ? loop->timers.data[1] : NULL; }
static void
tm2_free(resource *r)
{
timer2 *t = (timer2 *) r;
tm2_stop(t);
}
static void
tm2_dump(resource *r)
{
timer2 *t = (timer2 *) r;
debug("(code %p, data %p, ", t->hook, t->data);
if (t->randomize)
debug("rand %d, ", t->randomize);
if (t->recurrent)
debug("recur %d, ", t->recurrent);
if (t->expires)
debug("expires in %d ms)\n", (t->expires - current_time()) TO_MS);
else
debug("inactive)\n");
}
static struct resclass tm2_class = {
"Timer",
sizeof(timer2),
tm2_free,
tm2_dump,
NULL,
NULL
};
timer2 *
tm2_new(pool *p)
{
timer2 *t = ralloc(p, &tm2_class);
t->index = -1;
return t;
}
void
tm2_set(timer2 *t, btime when)
{
struct birdloop *loop = birdloop_current();
uint tc = timers_count(loop);
if (!t->expires)
{
t->index = ++tc;
t->expires = when;
BUFFER_PUSH(loop->timers) = t;
HEAP_INSERT(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP);
}
else if (t->expires < when)
{
t->expires = when;
HEAP_INCREASE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
}
else if (t->expires > when)
{
t->expires = when;
HEAP_DECREASE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
}
if (loop->poll_active && (t->index == 1))
wakeup_kick(loop);
}
void
tm2_start(timer2 *t, btime after)
{
tm2_set(t, current_time() + MAX(after, 0));
}
void
tm2_stop(timer2 *t)
{
if (!t->expires)
return;
struct birdloop *loop = birdloop_current();
uint tc = timers_count(loop);
HEAP_DELETE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
BUFFER_POP(loop->timers);
t->index = -1;
t->expires = 0;
}
static void
timers_init(struct birdloop *loop)
{
BUFFER_INIT(loop->timers, loop->pool, 4);
BUFFER_PUSH(loop->timers) = NULL;
}
static void
timers_fire(struct birdloop *loop)
{
btime base_time;
timer2 *t;
times_update(loop);
base_time = loop->last_time;
while (t = timers_first(loop))
{
if (t->expires > base_time)
return;
if (t->recurrent)
{
btime when = t->expires + t->recurrent;
if (when <= loop->last_time)
when = loop->last_time + t->recurrent;
if (t->randomize)
when += random() % (t->randomize + 1);
tm2_set(t, when);
}
else
tm2_stop(t);
t->hook(t);
}
}
/*
* Sockets
*/
static void
sockets_init(struct birdloop *loop)
{
init_list(&loop->sock_list);
loop->sock_num = 0;
BUFFER_INIT(loop->poll_sk, loop->pool, 4);
BUFFER_INIT(loop->poll_fd, loop->pool, 4);
loop->poll_changed = 1; /* add wakeup fd */
}
static void
sockets_add(struct birdloop *loop, sock *s)
{
add_tail(&loop->sock_list, &s->n);
loop->sock_num++;
s->index = -1;
loop->poll_changed = 1;
if (loop->poll_active)
wakeup_kick(loop);
}
void
sk_start(sock *s)
{
struct birdloop *loop = birdloop_current();
sockets_add(loop, s);
}
static void
sockets_remove(struct birdloop *loop, sock *s)
{
rem_node(&s->n);
loop->sock_num--;
if (s->index >= 0)
loop->poll_sk.data[s->index] = NULL;
s->index = -1;
loop->poll_changed = 1;
/* Wakeup moved to sk_stop() */
}
void
sk_stop(sock *s)
{
struct birdloop *loop = birdloop_current();
sockets_remove(loop, s);
if (loop->poll_active)
{
loop->close_scheduled = 1;
wakeup_kick(loop);
}
else
close(s->fd);
s->fd = -1;
}
static inline uint sk_want_events(sock *s)
{ return (s->rx_hook ? POLLIN : 0) | ((s->ttx != s->tpos) ? POLLOUT : 0); }
/*
FIXME: this should be called from sock code
static void
sockets_update(struct birdloop *loop, sock *s)
{
if (s->index >= 0)
loop->poll_fd.data[s->index].events = sk_want_events(s);
}
*/
static void
sockets_prepare(struct birdloop *loop)
{
BUFFER_SET(loop->poll_sk, loop->sock_num + 1);
BUFFER_SET(loop->poll_fd, loop->sock_num + 1);
struct pollfd *pfd = loop->poll_fd.data;
sock **psk = loop->poll_sk.data;
int i = 0;
node *n;
WALK_LIST(n, loop->sock_list)
{
sock *s = SKIP_BACK(sock, n, n);
ASSERT(i < loop->sock_num);
s->index = i;
*psk = s;
pfd->fd = s->fd;
pfd->events = sk_want_events(s);
pfd->revents = 0;
pfd++;
psk++;
i++;
}
ASSERT(i == loop->sock_num);
/* Add internal wakeup fd */
*psk = NULL;
pfd->fd = loop->wakeup_fds[0];
pfd->events = POLLIN;
pfd->revents = 0;
loop->poll_changed = 0;
}
static void
sockets_close_fds(struct birdloop *loop)
{
struct pollfd *pfd = loop->poll_fd.data;
sock **psk = loop->poll_sk.data;
int poll_num = loop->poll_fd.used - 1;
int i;
for (i = 0; i < poll_num; i++)
if (psk[i] == NULL)
close(pfd[i].fd);
loop->close_scheduled = 0;
}
int sk_read(sock *s);
int sk_write(sock *s);
static void
sockets_fire(struct birdloop *loop)
{
struct pollfd *pfd = loop->poll_fd.data;
sock **psk = loop->poll_sk.data;
int poll_num = loop->poll_fd.used - 1;
times_update(loop);
/* Last fd is internal wakeup fd */
if (pfd[loop->sock_num].revents & POLLIN)
wakeup_drain(loop);
int i;
for (i = 0; i < poll_num; pfd++, psk++, i++)
{
int e = 1;
if (! pfd->revents)
continue;
if (pfd->revents & POLLNVAL)
die("poll: invalid fd %d", pfd->fd);
if (pfd->revents & POLLIN)
while (e && *psk && (*psk)->rx_hook)
e = sk_read(*psk);
e = 1;
if (pfd->revents & POLLOUT)
while (e && *psk)
e = sk_write(*psk);
}
}
/*
* Birdloop
*/
static void * birdloop_main(void *arg);
struct birdloop *
birdloop_new(void)
{
/* FIXME: this init should be elsewhere and thread-safe */
static int init = 0;
if (!init)
{ birdloop_init_current(); init = 1; }
pool *p = rp_new(NULL, "Birdloop root");
struct birdloop *loop = mb_allocz(p, sizeof(struct birdloop));
loop->pool = p;
pthread_mutex_init(&loop->mutex, NULL);
times_init(loop);
wakeup_init(loop);
events_init(loop);
timers_init(loop);
sockets_init(loop);
return loop;
}
void
birdloop_start(struct birdloop *loop)
{
int rv = pthread_create(&loop->thread, NULL, birdloop_main, loop);
if (rv)
die("pthread_create(): %M", rv);
}
void
birdloop_stop(struct birdloop *loop)
{
pthread_mutex_lock(&loop->mutex);
loop->stop_called = 1;
wakeup_do_kick(loop);
pthread_mutex_unlock(&loop->mutex);
int rv = pthread_join(loop->thread, NULL);
if (rv)
die("pthread_join(): %M", rv);
}
void
birdloop_free(struct birdloop *loop)
{
rfree(loop->pool);
}
void
birdloop_enter(struct birdloop *loop)
{
/* TODO: these functions could save and restore old context */
pthread_mutex_lock(&loop->mutex);
birdloop_set_current(loop);
}
void
birdloop_leave(struct birdloop *loop)
{
/* TODO: these functions could save and restore old context */
birdloop_set_current(NULL);
pthread_mutex_unlock(&loop->mutex);
}
void
birdloop_mask_wakeups(struct birdloop *loop)
{
pthread_mutex_lock(&loop->mutex);
loop->wakeup_masked = 1;
pthread_mutex_unlock(&loop->mutex);
}
void
birdloop_unmask_wakeups(struct birdloop *loop)
{
pthread_mutex_lock(&loop->mutex);
if (loop->wakeup_masked == 2)
wakeup_do_kick(loop);
loop->wakeup_masked = 0;
pthread_mutex_unlock(&loop->mutex);
}
static void *
birdloop_main(void *arg)
{
struct birdloop *loop = arg;
timer2 *t;
int rv, timeout;
birdloop_set_current(loop);
pthread_mutex_lock(&loop->mutex);
while (1)
{
events_fire(loop);
timers_fire(loop);
times_update(loop);
if (events_waiting(loop))
timeout = 0;
else if (t = timers_first(loop))
timeout = (tm2_remains(t) TO_MS) + 1;
else
timeout = -1;
if (loop->poll_changed)
sockets_prepare(loop);
loop->poll_active = 1;
pthread_mutex_unlock(&loop->mutex);
try:
rv = poll(loop->poll_fd.data, loop->poll_fd.used, timeout);
if (rv < 0)
{
if (errno == EINTR || errno == EAGAIN)
goto try;
die("poll: %m");
}
pthread_mutex_lock(&loop->mutex);
loop->poll_active = 0;
if (loop->close_scheduled)
sockets_close_fds(loop);
if (loop->stop_called)
break;
if (rv)
sockets_fire(loop);
timers_fire(loop);
}
loop->stop_called = 0;
pthread_mutex_unlock(&loop->mutex);
return NULL;
}

99
proto/bfd/io.h Normal file
View File

@ -0,0 +1,99 @@
/*
* BIRD -- I/O and event loop
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BFD_IO_H_
#define _BIRD_BFD_IO_H_
#include "nest/bird.h"
#include "lib/lists.h"
#include "lib/resource.h"
#include "lib/event.h"
#include "lib/socket.h"
// #include "lib/timer.h"
typedef struct timer2
{
resource r;
void (*hook)(struct timer2 *);
void *data;
btime expires; /* 0=inactive */
uint randomize; /* Amount of randomization */
uint recurrent; /* Timer recurrence */
int index;
} timer2;
btime current_time(void);
void ev2_schedule(event *e);
timer2 *tm2_new(pool *p);
void tm2_set(timer2 *t, btime when);
void tm2_start(timer2 *t, btime after);
void tm2_stop(timer2 *t);
static inline int
tm2_active(timer2 *t)
{
return t->expires != 0;
}
static inline btime
tm2_remains(timer2 *t)
{
btime now = current_time();
return (t->expires > now) ? (t->expires - now) : 0;
}
static inline timer2 *
tm2_new_init(pool *p, void (*hook)(struct timer2 *), void *data, uint rec, uint rand)
{
timer2 *t = tm2_new(p);
t->hook = hook;
t->data = data;
t->recurrent = rec;
t->randomize = rand;
return t;
}
static inline void
tm2_set_max(timer2 *t, btime when)
{
if (when > t->expires)
tm2_set(t, when);
}
/*
static inline void
tm2_start_max(timer2 *t, btime after)
{
btime rem = tm2_remains(t);
tm2_start(t, _MAX(rem, after));
}
*/
void sk_start(sock *s);
void sk_stop(sock *s);
struct birdloop *birdloop_new(void);
void birdloop_start(struct birdloop *loop);
void birdloop_stop(struct birdloop *loop);
void birdloop_free(struct birdloop *loop);
void birdloop_enter(struct birdloop *loop);
void birdloop_leave(struct birdloop *loop);
void birdloop_mask_wakeups(struct birdloop *loop);
void birdloop_unmask_wakeups(struct birdloop *loop);
#endif /* _BIRD_BFD_IO_H_ */

248
proto/bfd/packets.c Normal file
View File

@ -0,0 +1,248 @@
/*
* BIRD -- Bidirectional Forwarding Detection (BFD)
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "bfd.h"
struct bfd_ctl_packet
{
u8 vdiag; /* version and diagnostic */
u8 flags; /* state and flags */
u8 detect_mult;
u8 length;
u32 snd_id; /* sender ID, aka 'my discriminator' */
u32 rcv_id; /* receiver ID, aka 'your discriminator' */
u32 des_min_tx_int;
u32 req_min_rx_int;
u32 req_min_echo_rx_int;
};
#define BFD_BASE_LEN sizeof(struct bfd_ctl_packet)
#define BFD_MAX_LEN 64
static inline u8 bfd_pack_vdiag(u8 version, u8 diag)
{ return (version << 5) | diag; }
static inline u8 bfd_pack_flags(u8 state, u8 flags)
{ return (state << 6) | flags; }
static inline u8 bfd_pkt_get_version(struct bfd_ctl_packet *pkt)
{ return pkt->vdiag >> 5; }
static inline u8 bfd_pkt_get_diag(struct bfd_ctl_packet *pkt)
{ return pkt->vdiag && 0x1f; }
static inline u8 bfd_pkt_get_state(struct bfd_ctl_packet *pkt)
{ return pkt->flags >> 6; }
static inline void bfd_pkt_set_state(struct bfd_ctl_packet *pkt, u8 val)
{ pkt->flags = val << 6; }
char *
bfd_format_flags(u8 flags, char *buf)
{
char *bp = buf;
if (flags & BFD_FLAGS) *bp++ = ' ';
if (flags & BFD_FLAG_POLL) *bp++ = 'P';
if (flags & BFD_FLAG_FINAL) *bp++ = 'F';
if (flags & BFD_FLAG_CPI) *bp++ = 'C';
if (flags & BFD_FLAG_AP) *bp++ = 'A';
if (flags & BFD_FLAG_DEMAND) *bp++ = 'D';
if (flags & BFD_FLAG_MULTIPOINT) *bp++ = 'M';
*bp = 0;
return buf;
}
void
bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final)
{
sock *sk = s->ifa->sk;
struct bfd_ctl_packet *pkt = (struct bfd_ctl_packet *) sk->tbuf;
char fb[8];
pkt->vdiag = bfd_pack_vdiag(1, s->loc_diag);
pkt->flags = bfd_pack_flags(s->loc_state, 0);
pkt->detect_mult = s->detect_mult;
pkt->length = BFD_BASE_LEN;
pkt->snd_id = htonl(s->loc_id);
pkt->rcv_id = htonl(s->rem_id);
pkt->des_min_tx_int = htonl(s->des_min_tx_new);
pkt->req_min_rx_int = htonl(s->req_min_rx_new);
pkt->req_min_echo_rx_int = 0;
if (final)
pkt->flags |= BFD_FLAG_FINAL;
else if (s->poll_active)
pkt->flags |= BFD_FLAG_POLL;
if (sk->tbuf != sk->tpos)
log(L_WARN "%s: Old packet overwritten in TX buffer", p->p.name);
TRACE(D_PACKETS, "Sending CTL to %I [%s%s]", s->addr,
bfd_state_names[s->loc_state], bfd_format_flags(pkt->flags, fb));
sk_send_to(sk, pkt->length, s->addr, sk->dport);
}
#define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
static int
bfd_rx_hook(sock *sk, int len)
{
struct bfd_proto *p = sk->data;
struct bfd_ctl_packet *pkt = (struct bfd_ctl_packet *) sk->rbuf;
const char *err_dsc = NULL;
uint err_val = 0;
char fb[8];
if ((sk->sport == BFD_CONTROL_PORT) && (sk->ttl < 255))
DROP("wrong TTL", sk->ttl);
if (len < BFD_BASE_LEN)
DROP("too short", len);
u8 version = bfd_pkt_get_version(pkt);
if (version != 1)
DROP("version mismatch", version);
if ((pkt->length < BFD_BASE_LEN) || (pkt->length > len))
DROP("length mismatch", pkt->length);
if (pkt->detect_mult == 0)
DROP("invalid detect mult", 0);
if ((pkt->flags & BFD_FLAG_MULTIPOINT) ||
((pkt->flags & BFD_FLAG_POLL) && (pkt->flags & BFD_FLAG_FINAL)))
DROP("invalid flags", pkt->flags);
if (pkt->snd_id == 0)
DROP("invalid my discriminator", 0);
struct bfd_session *s;
u32 id = ntohl(pkt->rcv_id);
if (id)
{
s = bfd_find_session_by_id(p, id);
if (!s)
DROP("unknown session id", id);
}
else
{
u8 ps = bfd_pkt_get_state(pkt);
if (ps > BFD_STATE_DOWN)
DROP("invalid init state", ps);
s = bfd_find_session_by_addr(p, sk->faddr);
/* FIXME: better session matching and message */
if (!s)
return 1;
}
/* FIXME: better authentication handling and message */
if (pkt->flags & BFD_FLAG_AP)
DROP("authentication not supported", 0);
u32 old_tx_int = s->des_min_tx_int;
u32 old_rx_int = s->rem_min_rx_int;
s->rem_id= ntohl(pkt->snd_id);
s->rem_state = bfd_pkt_get_state(pkt);
s->rem_diag = bfd_pkt_get_diag(pkt);
s->rem_demand_mode = pkt->flags & BFD_FLAG_DEMAND;
s->rem_min_tx_int = ntohl(pkt->des_min_tx_int);
s->rem_min_rx_int = ntohl(pkt->req_min_rx_int);
s->rem_detect_mult = pkt->detect_mult;
TRACE(D_PACKETS, "CTL received from %I [%s%s]", sk->faddr,
bfd_state_names[s->rem_state], bfd_format_flags(pkt->flags, fb));
bfd_session_process_ctl(s, pkt->flags, old_tx_int, old_rx_int);
return 1;
drop:
log(L_REMOTE "%s: Bad packet from %I - %s (%u)", p->p.name, sk->faddr, err_dsc, err_val);
return 1;
}
static void
bfd_err_hook(sock *sk, int err)
{
struct bfd_proto *p = sk->data;
log(L_ERR "%s: Socket error: %m", p->p.name, err);
}
sock *
bfd_open_rx_sk(struct bfd_proto *p, int multihop)
{
sock *sk = sk_new(p->tpool);
sk->type = SK_UDP;
sk->sport = !multihop ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
sk->data = p;
sk->rbsize = BFD_MAX_LEN;
sk->rx_hook = bfd_rx_hook;
sk->err_hook = bfd_err_hook;
/* TODO: configurable ToS and priority */
sk->tos = IP_PREC_INTERNET_CONTROL;
sk->priority = sk_priority_control;
sk->flags = SKF_THREAD | SKF_LADDR_RX | (!multihop ? SKF_TTL_RX : 0);
#ifdef IPV6
sk->flags |= SKF_V6ONLY;
#endif
if (sk_open(sk) < 0)
goto err;
sk_start(sk);
return sk;
err:
rfree(sk);
return NULL;
}
sock *
bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa)
{
sock *sk = sk_new(p->tpool);
sk->type = SK_UDP;
sk->saddr = local;
sk->dport = ifa ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
sk->iface = ifa;
sk->data = p;
sk->tbsize = BFD_MAX_LEN;
sk->err_hook = bfd_err_hook;
/* TODO: configurable ToS, priority and TTL security */
sk->tos = IP_PREC_INTERNET_CONTROL;
sk->priority = sk_priority_control;
sk->ttl = ifa ? 255 : -1;
sk->flags = SKF_THREAD;
#ifdef IPV6
sk->flags |= SKF_V6ONLY;
#endif
if (sk_open(sk) < 0)
goto err;
sk_start(sk);
return sk;
err:
rfree(sk);
return NULL;
}

48
proto/bgp/bgp.c
View File

@ -59,8 +59,9 @@
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "nest/locks.h"
#include "nest/bfd.h"
#include "nest/cli.h"
#include "nest/locks.h"
#include "conf/conf.h"
#include "lib/socket.h"
#include "lib/resource.h"
@ -76,6 +77,7 @@ static void bgp_close(struct bgp_proto *p, int apply_md5);
static void bgp_connect(struct bgp_proto *p);
static void bgp_active(struct bgp_proto *p);
static sock *bgp_setup_listen_sk(ip_addr addr, unsigned port, u32 flags);
static void bgp_update_bfd(struct bgp_proto *p, int use_bfd);
/**
@ -153,8 +155,12 @@ bgp_initiate(struct bgp_proto *p)
if (rv < 0)
return;
if (p->cf->bfd)
bgp_update_bfd(p, p->cf->bfd);
if (p->startup_delay)
{
p->start_state = BSS_DELAY;
BGP_TRACE(D_EVENTS, "Startup delayed by %d seconds", p->startup_delay);
bgp_start_timer(p->startup_timer, p->startup_delay);
}
@ -765,6 +771,37 @@ bgp_neigh_notify(neighbor *n)
}
}
static void
bgp_bfd_notify(struct bfd_request *req)
{
struct bgp_proto *p = req->data;
int ps = p->p.proto_state;
if (req->down && ((ps == PS_START) || (ps == PS_UP)))
{
BGP_TRACE(D_EVENTS, "BFD session down");
bgp_store_error(p, NULL, BE_MISC, BEM_BFD_DOWN);
if (ps == PS_UP)
bgp_update_startup_delay(p);
bgp_stop(p, 0);
}
}
static void
bgp_update_bfd(struct bgp_proto *p, int use_bfd)
{
if (use_bfd && !p->bfd_req)
p->bfd_req = bfd_request_session(p->p.pool, p->cf->remote_ip, p->source_addr,
p->cf->multihop ? NULL : p->neigh->iface,
bgp_bfd_notify, p);
if (!use_bfd && p->bfd_req)
{
rfree(p->bfd_req);
p->bfd_req = NULL;
}
}
static int
bgp_reload_routes(struct proto *P)
{
@ -825,6 +862,7 @@ bgp_start(struct proto *P)
p->outgoing_conn.state = BS_IDLE;
p->incoming_conn.state = BS_IDLE;
p->neigh = NULL;
p->bfd_req = NULL;
rt_lock_table(p->igp_table);
@ -992,6 +1030,9 @@ bgp_check_config(struct bgp_config *c)
ipa_has_link_scope(c->source_addr)))
cf_error("Multihop BGP cannot be used with link-local addresses");
if (c->multihop && c->bfd && ipa_zero(c->source_addr))
cf_error("Multihop BGP with BFD requires specified source address");
/* Different default based on rs_client */
if (!c->missing_lladdr)
@ -1034,6 +1075,9 @@ bgp_reconfigure(struct proto *P, struct proto_config *C)
|| (old->password && new->password && !strcmp(old->password, new->password)))
&& (get_igp_table(old) == get_igp_table(new));
if (same && (p->start_state > BSS_PREPARE))
bgp_update_bfd(p, new->bfd);
/* We should update our copy of configuration ptr as old configuration will be freed */
if (same)
p->cf = new;
@ -1115,7 +1159,7 @@ bgp_store_error(struct bgp_proto *p, struct bgp_conn *c, u8 class, u32 code)
static char *bgp_state_names[] = { "Idle", "Connect", "Active", "OpenSent", "OpenConfirm", "Established", "Close" };
static char *bgp_err_classes[] = { "", "Error: ", "Socket: ", "Received: ", "BGP Error: ", "Automatic shutdown: ", ""};
static char *bgp_misc_errors[] = { "", "Neighbor lost", "Invalid next hop", "Kernel MD5 auth failed", "No listening socket" };
static char *bgp_misc_errors[] = { "", "Neighbor lost", "Invalid next hop", "Kernel MD5 auth failed", "No listening socket", "BFD session down" };
static char *bgp_auto_errors[] = { "", "Route limit exceeded"};
static const char *

5
proto/bgp/bgp.h
View File

@ -14,6 +14,7 @@
struct linpool;
struct eattr;
struct bfd_request;
struct bgp_config {
struct proto_config c;
@ -53,8 +54,10 @@ struct bgp_config {
unsigned error_delay_time_min; /* Time to wait after an error is detected */
unsigned error_delay_time_max;
unsigned disable_after_error; /* Disable the protocol when error is detected */
char *password; /* Password used for MD5 authentication */
struct rtable_config *igp_table; /* Table used for recursive next hop lookups */
int bfd; /* Use BFD for liveness detection */
};
#define MLL_SELF 1
@ -100,6 +103,7 @@ struct bgp_proto {
struct bgp_conn incoming_conn; /* Incoming connection we have neither accepted nor rejected yet */
struct object_lock *lock; /* Lock for neighbor connection */
struct neighbor *neigh; /* Neighbor entry corresponding to remote ip, NULL if multihop */
struct bfd_request *bfd_req; /* BFD request, if BFD is used */
ip_addr source_addr; /* Local address used as an advertised next hop */
rtable *igp_table; /* Table used for recursive next hop lookups */
struct event *event; /* Event for respawning and shutting process */
@ -288,6 +292,7 @@ void bgp_log_error(struct bgp_proto *p, u8 class, char *msg, unsigned code, unsi
#define BEM_INVALID_NEXT_HOP 2
#define BEM_INVALID_MD5 3 /* MD5 authentication kernel request failed (possibly not supported) */
#define BEM_NO_SOCKET 4
#define BEM_BFD_DOWN 5
/* Automatic shutdown error codes */

3
proto/bgp/config.Y
View File

@ -26,7 +26,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
PREFER, OLDER, MISSING, LLADDR, DROP, IGNORE, ROUTE, REFRESH,
INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID, BGP_CLUSTER_LIST, IGP,
TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL, SECURITY, DETERMINISTIC,
SECONDARY, ALLOW)
SECONDARY, ALLOW, BFD)
CF_GRAMMAR
@ -112,6 +112,7 @@ bgp_proto:
| bgp_proto ALLOW LOCAL AS expr ';' { BGP_CFG->allow_local_as = $5; }
| bgp_proto IGP TABLE rtable ';' { BGP_CFG->igp_table = $4; }
| bgp_proto TTL SECURITY bool ';' { BGP_CFG->ttl_security = $4; }
| bgp_proto BFD bool ';' { BGP_CFG->bfd = $3; cf_check_bfd($3); }
;
CF_ADDTO(dynamic_attr, BGP_ORIGIN

1
proto/ospf/config.Y
View File

@ -309,6 +309,7 @@ ospf_iface_item:
| TX PRIORITY expr { OSPF_PATT->tx_priority = $3; }
| TTL SECURITY bool { OSPF_PATT->ttl_security = $3; }
| TTL SECURITY TX ONLY { OSPF_PATT->ttl_security = 2; }
| BFD bool { OSPF_PATT->bfd = $2; cf_check_bfd($2); }
| password_list
;

3
proto/ospf/hello.c
View File

@ -151,6 +151,9 @@ ospf_hello_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
#ifdef OSPFv3
n->iface_id = ntohl(ps->iface_id);
#endif
if (n->ifa->cf->bfd)
ospf_neigh_update_bfd(n, n->ifa->bfd);
}
#ifdef OSPFv3 /* NOTE: this could also be relevant for OSPFv2 on PtP ifaces */
else if (!ipa_equal(faddr, n->ip))

14
proto/ospf/iface.c
View File

@ -536,6 +536,7 @@ ospf_iface_new(struct ospf_area *oa, struct ifa *addr, struct ospf_iface_patt *i
ifa->check_link = ip->check_link;
ifa->ecmp_weight = ip->ecmp_weight;
ifa->check_ttl = (ip->ttl_security == 1);
ifa->bfd = ip->bfd;
#ifdef OSPFv2
ifa->autype = ip->autype;
@ -840,6 +841,19 @@ ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new)
ifa->ecmp_weight = new->ecmp_weight;
}
/* BFD */
if (ifa->bfd != new->bfd)
{
OSPF_TRACE(D_EVENTS, "%s BFD on interface %s",
new->bfd ? "Enabling" : "Disabling", ifname);
ifa->bfd = new->bfd;
struct ospf_neighbor *n;
WALK_LIST(n, ifa->neigh_list)
ospf_neigh_update_bfd(n, ifa->bfd);
}
/* instance_id is not updated - it is part of key */
return 1;

30
proto/ospf/neighbor.c
View File

@ -582,6 +582,36 @@ ospf_neigh_remove(struct ospf_neighbor *n)
OSPF_TRACE(D_EVENTS, "Deleting neigbor.");
}
static void
ospf_neigh_bfd_hook(struct bfd_request *req)
{
struct ospf_neighbor *n = req->data;
struct proto *p = &n->ifa->oa->po->proto;
if (req->down)
{
OSPF_TRACE(D_EVENTS, "BFD session down for %I on %s",
n->ip, n->ifa->iface->name);
ospf_neigh_remove(n);
}
}
void
ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd)
{
if (use_bfd && !n->bfd_req)
n->bfd_req = bfd_request_session(n->pool, n->ip, n->ifa->addr->ip, n->ifa->iface,
ospf_neigh_bfd_hook, n);
if (!use_bfd && n->bfd_req)
{
rfree(n->bfd_req);
n->bfd_req = NULL;
}
}
void
ospf_sh_neigh_info(struct ospf_neighbor *n)
{

1
proto/ospf/neighbor.h
View File

@ -16,6 +16,7 @@ void bdr_election(struct ospf_iface *ifa);
struct ospf_neighbor *find_neigh(struct ospf_iface *ifa, u32 rid);
struct ospf_neighbor *find_neigh_by_ip(struct ospf_iface *ifa, ip_addr ip);
void ospf_neigh_remove(struct ospf_neighbor *n);
void ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd);
void ospf_sh_neigh_info(struct ospf_neighbor *n);
#endif /* _BIRD_OSPF_NEIGHBOR_H_ */

4
proto/ospf/ospf.h
View File

@ -46,6 +46,7 @@ do { if ((p->debug & D_PACKETS) || OSPF_FORCE_DEBUG) \
#include "nest/route.h"
#include "nest/cli.h"
#include "nest/locks.h"
#include "nest/bfd.h"
#include "conf/conf.h"
#include "lib/string.h"
@ -276,6 +277,7 @@ struct ospf_iface
u8 ecmp_weight; /* Weight used for ECMP */
u8 ptp_netmask; /* Send real netmask for P2P */
u8 check_ttl; /* Check incoming packets for TTL 255 */
u8 bfd; /* Use BFD on iface */
};
struct ospf_md5
@ -708,6 +710,7 @@ struct ospf_neighbor
#define ACKL_DIRECT 0
#define ACKL_DELAY 1
timer *ackd_timer; /* Delayed ack timer */
struct bfd_request *bfd_req; /* BFD request, if BFD is used */
u32 csn; /* Last received crypt seq number (for MD5) */
};
@ -818,6 +821,7 @@ struct ospf_iface_patt
u8 real_bcast; /* Not really used in OSPFv3 */
u8 ptp_netmask; /* bool + 2 for unspecified */
u8 ttl_security; /* bool + 2 for TX only */
u8 bfd;
#ifdef OSPFv2
list *passwords;

3
proto/ospf/topology.c
View File

@ -103,7 +103,8 @@ lsab_alloc(struct proto_ospf *po, unsigned size)
if (po->lsab_used > po->lsab_size)
{
po->lsab_size = MAX(po->lsab_used, 2 * po->lsab_size);
po->lsab = mb_realloc(po->proto.pool, po->lsab, po->lsab_size);
po->lsab = po->lsab ? mb_realloc(po->lsab, po->lsab_size):
mb_alloc(po->proto.pool, po->lsab_size);
}
return ((byte *) po->lsab) + offset;
}

2
proto/radv/radv.c
View File

@ -15,7 +15,7 @@
* The RAdv protocol is implemented in two files: |radv.c| containing
* the interface with BIRD core and the protocol logic and |packets.c|
* handling low level protocol stuff (RX, TX and packet formats).
* The protocol does not import or export any routes.
* The protocol does not export any routes.
*
* The RAdv is structured in the usual way - for each handled interface
* there is a structure &radv_iface that contains a state related to

1
proto/rip/rip.c
View File

@ -63,6 +63,7 @@
#define P ((struct rip_proto *) p)
#define P_CF ((struct rip_proto_config *)p->cf)
#undef TRACE
#define TRACE(level, msg, args...) do { if (p->debug & level) { log(L_TRACE "%s: " msg, p->name , ## args); } } while(0)
static struct rip_interface *new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_patt *patt);

4
sysdep/autoconf.h.in
View File

@ -39,10 +39,14 @@
#undef CONFIG_STATIC
#undef CONFIG_RIP
#undef CONFIG_RADV
#undef CONFIG_BFD
#undef CONFIG_BGP
#undef CONFIG_OSPF
#undef CONFIG_PIPE
/* We use multithreading */
#undef USE_PTHREADS
/* We have <syslog.h> and syslog() */
#undef HAVE_SYSLOG

1
sysdep/config.h
View File

@ -34,6 +34,7 @@ typedef INTEGER_64 s64;
typedef unsigned INTEGER_64 u64;
typedef u8 byte;
typedef u16 word;
typedef unsigned int uint;
#endif

17
sysdep/unix/io.c
View File

@ -538,6 +538,11 @@ sk_free(resource *r)
if (s->fd >= 0)
{
close(s->fd);
/* FIXME: we should call sk_stop() for SKF_THREAD sockets */
if (s->flags & SKF_THREAD)
return;
if (s == current_sock)
current_sock = sk_next(s);
if (s == stored_sock)
@ -1240,7 +1245,8 @@ sk_open(sock *s)
#endif
}
sk_insert(s);
if (!(s->flags & SKF_THREAD))
sk_insert(s);
return 0;
bad:
@ -1428,7 +1434,9 @@ sk_send_full(sock *s, unsigned len, struct iface *ifa,
}
*/
static int
/* sk_read() and sk_write() are called from BFD's event loop */
int
sk_read(sock *s)
{
switch (s->type)
@ -1505,7 +1513,7 @@ sk_read(sock *s)
}
}
static int
int
sk_write(sock *s)
{
switch (s->type)
@ -1523,7 +1531,8 @@ sk_write(sock *s)
default:
if (s->ttx != s->tpos && sk_maybe_write(s) > 0)
{
s->tx_hook(s);
if (s->tx_hook)
s->tx_hook(s);
return 1;
}
return 0;

105
sysdep/unix/log.c
View File

@ -32,8 +32,24 @@ static FILE *dbgf;
static list *current_log_list;
static char *current_syslog_name; /* NULL -> syslog closed */
bird_clock_t rate_limit_time = 5;
int rate_limit_count = 5;
static const bird_clock_t rate_limit_time = 5;
static const int rate_limit_count = 5;
#ifdef USE_PTHREADS
#include <pthread.h>
static pthread_mutex_t log_mutex;
static inline void log_lock(void) { pthread_mutex_lock(&log_mutex); }
static inline void log_unlock(void) { pthread_mutex_unlock(&log_mutex); }
#else
static inline void log_lock(void) { }
static inline void log_unlock(void) { }
#endif
#ifdef HAVE_SYSLOG
#include <sys/syslog.h>
@ -65,28 +81,6 @@ static char *class_names[] = {
"BUG"
};
#define LOG_BUFFER_SIZE 1024
static char log_buffer[LOG_BUFFER_SIZE];
static char *log_buffer_pos;
static int log_buffer_remains;
const char *log_buffer_ptr = log_buffer;
/**
* log_reset - reset the log buffer
*
* This function resets a log buffer and discards buffered
* messages. Should be used before a log message is prepared
* using logn().
*/
void
log_reset(void)
{
log_buffer_pos = log_buffer;
log_buffer_remains = LOG_BUFFER_SIZE;
log_buffer[0] = 0;
}
/**
* log_commit - commit a log message
@ -101,10 +95,14 @@ log_reset(void)
* in log(), so it should be written like *L_INFO.
*/
void
log_commit(int class)
log_commit(int class, buffer *buf)
{
struct log_config *l;
if (buf->pos == buf->end)
strcpy(buf->end - 100, " ... <too long>");
log_lock();
WALK_LIST(l, *current_log_list)
{
if (!(l->mask & (1 << class)))
@ -119,47 +117,30 @@ log_commit(int class)
tm_format_datetime(tbuf, &config->tf_log, now);
fprintf(l->fh, "%s <%s> ", tbuf, class_names[class]);
}
fputs(log_buffer, l->fh);
fputs(buf->start, l->fh);
fputc('\n', l->fh);
fflush(l->fh);
}
#ifdef HAVE_SYSLOG
else
syslog(syslog_priorities[class], "%s", log_buffer);
syslog(syslog_priorities[class], "%s", buf->start);
#endif
}
cli_echo(class, log_buffer);
log_unlock();
log_reset();
}
static void
log_print(const char *msg, va_list args)
{
int i;
if (log_buffer_remains == 0)
return;
i=bvsnprintf(log_buffer_pos, log_buffer_remains, msg, args);
if (i < 0)
{
bsprintf(log_buffer + LOG_BUFFER_SIZE - 100, " ... <too long>");
log_buffer_remains = 0;
return;
}
log_buffer_pos += i;
log_buffer_remains -= i;
/* FIXME: cli_echo is not thread-safe */
cli_echo(class, buf->start);
}
int buffer_vprint(buffer *buf, const char *fmt, va_list args);
static void
vlog(int class, const char *msg, va_list args)
{
log_reset();
log_print(msg, args);
log_commit(class);
buffer buf;
LOG_BUFFER_INIT(buf);
buffer_vprint(&buf, msg, args);
log_commit(class, &buf);
}
@ -188,26 +169,6 @@ log_msg(char *msg, ...)
va_end(args);
}
/**
* logn - prepare a partial message in the log buffer
* @msg: printf-like formatting string (without message class information)
*
* This function formats a message according to the format string @msg
* and adds it to the log buffer. Messages in the log buffer are
* logged when the buffer is flushed using log_commit() function. The
* message should not contain |\n|, log_commit() also terminates a
* line.
*/
void
logn(char *msg, ...)
{
va_list args;
va_start(args, msg);
log_print(msg, args);
va_end(args);
}
void
log_rl(struct rate_limit *rl, char *msg, ...)
{

9
sysdep/unix/main.c
View File

@ -199,7 +199,7 @@ unix_read_config(struct config **cp, char *name)
return ret;
}
static void
static struct config *
read_config(void)
{
struct config *conf;
@ -211,7 +211,8 @@ read_config(void)
else
die("Unable to open configuration file %s: %m", config_name);
}
config_commit(conf, RECONFIG_HARD, 0);
return conf;
}
void
@ -776,7 +777,7 @@ main(int argc, char **argv)
proto_build(&proto_unix_kernel);
proto_build(&proto_unix_iface);
read_config();
struct config *conf = read_config();
if (parse_and_exit)
exit(0);
@ -800,6 +801,8 @@ main(int argc, char **argv)
signal_init();
config_commit(conf, RECONFIG_HARD, 0);
#ifdef LOCAL_DEBUG
async_dump_flag = 1;
#endif