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Several minor fixes

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This commit is contained in:
Ondrej Zajicek (work) 2017-12-10 00:55:34 +01:00
parent ed1d853e51
commit 7fc55925be
9 changed files with 81 additions and 48 deletions
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34
doc/bird.sgml
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@ -2044,6 +2044,7 @@ avoid routing loops.
<item> <rfc id="7911"> - Advertisement of Multiple Paths in BGP
<item> <rfc id="7947"> - Internet Exchange BGP Route Server
<item> <rfc id="8092"> - BGP Large Communities Attribute
<item> <rfc id="8203"> - BGP Administrative Shutdown Communication
</itemize>
<sect1>Route selection rules
@ -2258,6 +2259,20 @@ using the following configuration parameters:
related procedures. Note that even when disabled, BIRD can send route
refresh requests. Default: on.
<tag><label id="bgp-graceful-restart">graceful restart <m/switch/|aware</tag>
When a BGP speaker restarts or crashes, neighbors will discard all
received paths from the speaker, which disrupts packet forwarding even
when the forwarding plane of the speaker remains intact. <rfc id="4724">
specifies an optional graceful restart mechanism to alleviate this
issue. This option controls the mechanism. It has three states:
Disabled, when no support is provided. Aware, when the graceful restart
support is announced and the support for restarting neighbors is
provided, but no local graceful restart is allowed (i.e. receiving-only
role). Enabled, when the full graceful restart support is provided
(i.e. both restarting and receiving role). Restarting role could be also
configured per-channel. Note that proper support for local graceful
restart requires also configuration of other protocols. Default: aware.
<tag><label id="bgp-graceful-restart-time">graceful restart time <m/number/</tag>
The restart time is announced in the BGP graceful restart capability
and specifies how long the neighbor would wait for the BGP session to
@ -2487,19 +2502,12 @@ together with their appropriate channels follows.
TX direction. When active, all available routes accepted by the export
filter are advertised to the neighbor. Default: off.
<tag><label id="bgp-graceful-restart">graceful restart <m/switch/|aware</tag>
When a BGP speaker restarts or crashes, neighbors will discard all
received paths from the speaker, which disrupts packet forwarding even
when the forwarding plane of the speaker remains intact. <rfc
id="4724"> specifies an optional graceful restart mechanism to
alleviate this issue. This option controls the mechanism. It has three
states: Disabled, when no support is provided. Aware, when the graceful
restart support is announced and the support for restarting neighbors
is provided, but no local graceful restart is allowed (i.e.
receiving-only role). Enabled, when the full graceful restart
support is provided (i.e. both restarting and receiving role). Note
that proper support for local graceful restart requires also
configuration of other protocols. Default: aware.
<tag><label id="bgp-graceful-restart-c">graceful restart <m/switch/</tag>
Although BGP graceful restart is configured mainly by protocol-wide
<ref id="bgp-graceful-restart" name="options">, it is possible to
configure restarting role per AFI/SAFI pair by this channel option.
The option is ignored if graceful restart is disabled by protocol-wide
option. Default: off in aware mode, on in full mode.
</descrip>
<sect1>Attributes

7
lib/net.h
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@ -230,11 +230,14 @@ static inline int net_type_match(const net_addr *a, u32 mask)
static inline int net_is_ip(const net_addr *a)
{ return (a->type == NET_IP4) || (a->type == NET_IP6); }
static inline int net_is_vpn(const net_addr *a)
{ return (a->type == NET_VPN4) || (a->type == NET_VPN6); }
static inline int net_is_roa(const net_addr *a)
{ return (a->type == NET_ROA4) || (a->type == NET_ROA6); }
static inline int net_is_vpn(const net_addr *a)
{ return (a->type == NET_VPN4) || (a->type == NET_VPN6); }
static inline int net_is_flow(const net_addr *a)
{ return (a->type == NET_FLOW4) || (a->type == NET_FLOW6); }
static inline ip4_addr net4_prefix(const net_addr *a)

4
nest/iface.c
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@ -849,7 +849,7 @@ if_show(void)
else if (i->master_index)
bsprintf(mbuf, " master=#%u", i->master_index);
cli_msg(-1001, "%s %s (index=%d%s)", i->name, (i->flags & IF_UP) ? "Up" : "Down", i->index, mbuf);
cli_msg(-1001, "%s %s (index=%d%s)", i->name, (i->flags & IF_UP) ? "up" : "down", i->index, mbuf);
if (!(i->flags & IF_MULTIACCESS))
type = "PtP";
else
@ -897,7 +897,7 @@ if_show_summary(void)
a6[0] = 0;
cli_msg(-1005, "%-10s %-6s %-18s %s",
i->name, (i->flags & IF_UP) ? "Up" : "Down", a4, a6);
i->name, (i->flags & IF_UP) ? "up" : "down", a4, a6);
}
cli_msg(0, "");
}

4
nest/rt-table.c
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@ -897,7 +897,9 @@ rte_validate(rte *e)
return 0;
}
c = net_classify(n->n.addr);
/* FIXME: better handling different nettypes */
c = !net_is_flow(n->n.addr) ?
net_classify(n->n.addr): (IADDR_HOST | SCOPE_UNIVERSE);
if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
{
log(L_WARN "Ignoring bogus route %N received via %s",

18
proto/bgp/attrs.c
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@ -64,8 +64,6 @@
* format - Optional hook that converts eattr to textual representation.
*/
// XXXX review pool usage : c->c.proto->pool
struct bgp_attr_desc {
const char *name;
@ -1175,6 +1173,22 @@ bgp_init_bucket_table(struct bgp_channel *c)
c->withdraw_bucket = NULL;
}
void
bgp_free_bucket_table(struct bgp_channel *c)
{
HASH_FREE(c->bucket_hash);
struct bgp_bucket *b;
WALK_LIST_FIRST(b, c->bucket_queue)
{
rem_node(&b->send_node);
mb_free(b);
}
mb_free(c->withdraw_bucket);
c->withdraw_bucket = NULL;
}
static struct bgp_bucket *
bgp_get_bucket(struct bgp_channel *c, ea_list *new)
{

50
proto/bgp/bgp.c
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@ -98,6 +98,7 @@
* <item> <rfc id="7911"> - Advertisement of Multiple Paths in BGP
* <item> <rfc id="7947"> - Internet Exchange BGP Route Server
* <item> <rfc id="8092"> - BGP Large Communities Attribute
* <item> <rfc id="8203"> - BGP Administrative Shutdown Communication
* </itemize>
*/
@ -601,10 +602,6 @@ bgp_conn_leave_established_state(struct bgp_proto *p)
BGP_TRACE(D_EVENTS, "BGP session closed");
p->conn = NULL;
// XXXX free these tables to avoid memory leak during graceful restart
// bgp_free_prefix_table(p);
// bgp_free_bucket_table(p);
if (p->p.proto_state == PS_UP)
bgp_stop(p, 0, NULL, 0);
}
@ -664,6 +661,10 @@ bgp_handle_graceful_restart(struct bgp_proto *p)
struct bgp_channel *c;
WALK_LIST(c, p->p.channels)
{
/* FIXME: perhaps check for channel state instead of disabled flag? */
if (c->c.disabled)
continue;
if (c->gr_ready)
{
if (c->gr_active)
@ -679,6 +680,13 @@ bgp_handle_graceful_restart(struct bgp_proto *p)
rt_refresh_begin(c->c.table, &c->c);
rt_refresh_end(c->c.table, &c->c);
}
/* Reset bucket and prefix tables */
bgp_free_bucket_table(c);
bgp_free_prefix_table(c);
bgp_init_bucket_table(c);
bgp_init_prefix_table(c);
c->packets_to_send = 0;
}
proto_notify_state(&p->p, PS_START);
@ -1315,7 +1323,7 @@ bgp_start(struct proto *P)
p->source_addr = p->cf->local_ip;
p->link_addr = IPA_NONE;
/* XXXX */
/* Lock all channels when in GR recovery mode */
if (p->p.gr_recovery && p->cf->gr_mode)
{
struct bgp_channel *c;
@ -1546,10 +1554,9 @@ bgp_channel_shutdown(struct channel *C)
{
struct bgp_channel *c = (void *) C;
/* XXXX: cleanup bucket and prefix tables */
c->next_hop_addr = IPA_NONE;
c->link_addr = IPA_NONE;
c->packets_to_send = 0;
}
static void
@ -2064,17 +2071,12 @@ bgp_show_proto_info(struct proto *P)
bgp_show_capabilities(p, p->conn->local_caps);
cli_msg(-1006, " Neighbor capabilities");
bgp_show_capabilities(p, p->conn->remote_caps);
/* XXXX
cli_msg(-1006, " Session: %s%s%s%s%s%s%s%s",
p->is_internal ? "internal" : "external",
p->cf->multihop ? " multihop" : "",
p->rr_client ? " route-reflector" : "",
p->rs_client ? " route-server" : "",
p->as4_session ? " AS4" : "",
p->add_path_rx ? " add-path-rx" : "",
p->add_path_tx ? " add-path-tx" : "",
p->ext_messages ? " ext-messages" : "");
*/
cli_msg(-1006, " Session: %s%s%s%s%s",
p->is_internal ? "internal" : "external",
p->cf->multihop ? " multihop" : "",
p->rr_client ? " route-reflector" : "",
p->rs_client ? " route-server" : "",
p->as4_session ? " AS4" : "");
cli_msg(-1006, " Source address: %I", p->source_addr);
cli_msg(-1006, " Hold timer: %t/%u",
tm_remains(p->conn->hold_timer), p->conn->hold_time);
@ -2091,16 +2093,18 @@ bgp_show_proto_info(struct proto *P)
}
{
/* XXXX ?? */
struct bgp_channel *c;
WALK_LIST(c, p->p.channels)
{
channel_show_info(&c->c);
if (ipa_zero(c->link_addr))
cli_msg(-1006, " BGP Next hop: %I", c->next_hop_addr);
else
cli_msg(-1006, " BGP Next hop: %I %I", c->next_hop_addr, c->link_addr);
if (c->c.channel_state == CS_UP)
{
if (ipa_zero(c->link_addr))
cli_msg(-1006, " BGP Next hop: %I", c->next_hop_addr);
else
cli_msg(-1006, " BGP Next hop: %I %I", c->next_hop_addr, c->link_addr);
}
if (c->igp_table_ip4)
cli_msg(-1006, " IGP IPv4 table: %s", c->igp_table_ip4->name);

2
proto/bgp/bgp.h
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@ -492,11 +492,13 @@ int bgp_encode_attrs(struct bgp_write_state *s, ea_list *attrs, byte *buf, byte
ea_list * bgp_decode_attrs(struct bgp_parse_state *s, byte *data, uint len);
void bgp_init_bucket_table(struct bgp_channel *c);
void bgp_free_bucket_table(struct bgp_channel *c);
void bgp_free_bucket(struct bgp_channel *c, struct bgp_bucket *b);
void bgp_defer_bucket(struct bgp_channel *c, struct bgp_bucket *b);
void bgp_withdraw_bucket(struct bgp_channel *c, struct bgp_bucket *b);
void bgp_init_prefix_table(struct bgp_channel *c);
void bgp_free_prefix_table(struct bgp_channel *c);
void bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *bp);
int bgp_rte_better(struct rte *, struct rte *);

8
proto/bgp/packets.c
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@ -1637,8 +1637,8 @@ bgp_decode_nlri_flow4(struct bgp_parse_state *s, byte *pos, uint len, rta *a)
uint pxlen = data[1];
// FIXME: Use some generic function
memcpy(&px, data, BYTES(pxlen));
px = ip4_and(px, ip4_mkmask(pxlen));
memcpy(&px, data+2, BYTES(pxlen));
px = ip4_and(ip4_ntoh(px), ip4_mkmask(pxlen));
/* Prepare the flow */
net_addr *n = alloca(sizeof(struct net_addr_flow4) + flen);
@ -1729,8 +1729,8 @@ bgp_decode_nlri_flow6(struct bgp_parse_state *s, byte *pos, uint len, rta *a)
uint pxlen = data[1];
// FIXME: Use some generic function
memcpy(&px, data, BYTES(pxlen));
px = ip6_and(px, ip6_mkmask(pxlen));
memcpy(&px, data+2, BYTES(pxlen));
px = ip6_and(ip6_ntoh(px), ip6_mkmask(pxlen));
/* Prepare the flow */
net_addr *n = alloca(sizeof(struct net_addr_flow6) + flen);

2
proto/ospf/config.Y
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@ -499,7 +499,7 @@ CF_ADDTO(dynamic_attr, OSPF_TAG { $$ = f_new_dynamic_attr(EAF_TYPE_INT | EAF_TEM
CF_ADDTO(dynamic_attr, OSPF_ROUTER_ID { $$ = f_new_dynamic_attr(EAF_TYPE_ROUTER_ID | EAF_TEMP, T_QUAD, EA_OSPF_ROUTER_ID); })
CF_CLI_HELP(SHOW OSPF, ..., [[Show information about OSPF protocol]]);
CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol XXX]])
CF_CLI(SHOW OSPF, optsym, [<name>], [[Show information about OSPF protocol]])
{ ospf_sh(proto_get_named($3, &proto_ospf)); };
CF_CLI(SHOW OSPF NEIGHBORS, optsym opttext, [<name>] [\"<interface>\"], [[Show information about OSPF neighbors]])