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-rw-r--r--sysdep/linux/krt-sys.h32
-rw-r--r--sysdep/linux/netlink.Y48
-rw-r--r--sysdep/linux/netlink.c494
3 files changed, 266 insertions, 308 deletions
diff --git a/sysdep/linux/krt-sys.h b/sysdep/linux/krt-sys.h
index 8897f889..aa90f6e4 100644
--- a/sysdep/linux/krt-sys.h
+++ b/sysdep/linux/krt-sys.h
@@ -34,38 +34,6 @@ static inline struct ifa * kif_get_primary_ip(struct iface *i UNUSED) { return N
#define KRT_ALLOW_MERGE_PATHS 1
-#define EA_KRT_PREFSRC EA_CODE(PROTOCOL_KERNEL, 0x10)
-#define EA_KRT_REALM EA_CODE(PROTOCOL_KERNEL, 0x11)
-#define EA_KRT_SCOPE EA_CODE(PROTOCOL_KERNEL, 0x12)
-
-
-#define KRT_METRICS_MAX 0x10 /* RTAX_QUICKACK+1 */
-#define KRT_METRICS_OFFSET 0x20 /* Offset of EA_KRT_* vs RTAX_* */
-
-#define KRT_FEATURES_MAX 4
-
-/*
- * Following attributes are parts of RTA_METRICS kernel route attribute, their
- * ids must be consistent with their RTAX_* constants (+ KRT_METRICS_OFFSET)
- */
-#define EA_KRT_METRICS EA_CODE(PROTOCOL_KERNEL, 0x20) /* Dummy one */
-#define EA_KRT_LOCK EA_CODE(PROTOCOL_KERNEL, 0x21)
-#define EA_KRT_MTU EA_CODE(PROTOCOL_KERNEL, 0x22)
-#define EA_KRT_WINDOW EA_CODE(PROTOCOL_KERNEL, 0x23)
-#define EA_KRT_RTT EA_CODE(PROTOCOL_KERNEL, 0x24)
-#define EA_KRT_RTTVAR EA_CODE(PROTOCOL_KERNEL, 0x25)
-#define EA_KRT_SSTRESH EA_CODE(PROTOCOL_KERNEL, 0x26)
-#define EA_KRT_CWND EA_CODE(PROTOCOL_KERNEL, 0x27)
-#define EA_KRT_ADVMSS EA_CODE(PROTOCOL_KERNEL, 0x28)
-#define EA_KRT_REORDERING EA_CODE(PROTOCOL_KERNEL, 0x29)
-#define EA_KRT_HOPLIMIT EA_CODE(PROTOCOL_KERNEL, 0x2a)
-#define EA_KRT_INITCWND EA_CODE(PROTOCOL_KERNEL, 0x2b)
-#define EA_KRT_FEATURES EA_CODE(PROTOCOL_KERNEL, 0x2c)
-#define EA_KRT_RTO_MIN EA_CODE(PROTOCOL_KERNEL, 0x2d)
-#define EA_KRT_INITRWND EA_CODE(PROTOCOL_KERNEL, 0x2e)
-#define EA_KRT_QUICKACK EA_CODE(PROTOCOL_KERNEL, 0x2f)
-
-
struct krt_params {
u32 table_id; /* Kernel table ID we sync with */
u32 metric; /* Kernel metric used for all routes */
diff --git a/sysdep/linux/netlink.Y b/sysdep/linux/netlink.Y
index 487ad1d8..7ba8c7c9 100644
--- a/sysdep/linux/netlink.Y
+++ b/sysdep/linux/netlink.Y
@@ -11,9 +11,6 @@ CF_HDR
CF_DECLS
CF_KEYWORDS(KERNEL, TABLE, METRIC, NETLINK, RX, BUFFER,
- KRT_PREFSRC, KRT_REALM, KRT_SCOPE, KRT_MTU, KRT_WINDOW,
- KRT_RTT, KRT_RTTVAR, KRT_SSTRESH, KRT_CWND, KRT_ADVMSS, KRT_REORDERING,
- KRT_HOPLIMIT, KRT_INITCWND, KRT_RTO_MIN, KRT_INITRWND, KRT_QUICKACK,
KRT_LOCK_MTU, KRT_LOCK_WINDOW, KRT_LOCK_RTT, KRT_LOCK_RTTVAR,
KRT_LOCK_SSTRESH, KRT_LOCK_CWND, KRT_LOCK_ADVMSS, KRT_LOCK_REORDERING,
KRT_LOCK_HOPLIMIT, KRT_LOCK_RTO_MIN, KRT_FEATURE_ECN, KRT_FEATURE_ALLFRAG)
@@ -28,39 +25,22 @@ kern_sys_item:
| NETLINK RX BUFFER expr { THIS_KRT->sys.netlink_rx_buffer = $4; }
;
-dynamic_attr: KRT_PREFSRC { $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_KRT_PREFSRC); } ;
-dynamic_attr: KRT_REALM { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_REALM); } ;
-dynamic_attr: KRT_SCOPE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SCOPE); } ;
-
-dynamic_attr: KRT_MTU { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_MTU); } ;
-dynamic_attr: KRT_WINDOW { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_WINDOW); } ;
-dynamic_attr: KRT_RTT { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_RTT); } ;
-dynamic_attr: KRT_RTTVAR { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_RTTVAR); } ;
-dynamic_attr: KRT_SSTRESH { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SSTRESH); } ;
-dynamic_attr: KRT_CWND { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_CWND); } ;
-dynamic_attr: KRT_ADVMSS { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_ADVMSS); } ;
-dynamic_attr: KRT_REORDERING { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_REORDERING); } ;
-dynamic_attr: KRT_HOPLIMIT { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_HOPLIMIT); } ;
-dynamic_attr: KRT_INITCWND { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_INITCWND); } ;
-dynamic_attr: KRT_RTO_MIN { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_RTO_MIN); } ;
-dynamic_attr: KRT_INITRWND { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_INITRWND); } ;
-dynamic_attr: KRT_QUICKACK { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_QUICKACK); } ;
-
/* Bits of EA_KRT_LOCK, based on RTAX_* constants */
-dynamic_attr: KRT_LOCK_MTU { $$ = f_new_dynamic_attr_bit(2, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_WINDOW { $$ = f_new_dynamic_attr_bit(3, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_RTT { $$ = f_new_dynamic_attr_bit(4, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_RTTVAR { $$ = f_new_dynamic_attr_bit(5, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_SSTRESH { $$ = f_new_dynamic_attr_bit(6, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_CWND { $$ = f_new_dynamic_attr_bit(7, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_ADVMSS { $$ = f_new_dynamic_attr_bit(8, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_REORDERING { $$ = f_new_dynamic_attr_bit(9, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_HOPLIMIT { $$ = f_new_dynamic_attr_bit(10, T_BOOL, EA_KRT_LOCK); } ;
-dynamic_attr: KRT_LOCK_RTO_MIN { $$ = f_new_dynamic_attr_bit(13, T_BOOL, EA_KRT_LOCK); } ;
-
-dynamic_attr: KRT_FEATURE_ECN { $$ = f_new_dynamic_attr_bit(0, T_BOOL, EA_KRT_FEATURES); } ;
-dynamic_attr: KRT_FEATURE_ALLFRAG { $$ = f_new_dynamic_attr(3, T_BOOL, EA_KRT_FEATURES); } ;
+attr_bit: KRT_LOCK_MTU { $$ = f_new_dynamic_attr_bit(2, "krt_lock"); } ;
+attr_bit: KRT_LOCK_WINDOW { $$ = f_new_dynamic_attr_bit(3, "krt_lock"); } ;
+attr_bit: KRT_LOCK_RTT { $$ = f_new_dynamic_attr_bit(4, "krt_lock"); } ;
+attr_bit: KRT_LOCK_RTTVAR { $$ = f_new_dynamic_attr_bit(5, "krt_lock"); } ;
+attr_bit: KRT_LOCK_SSTRESH { $$ = f_new_dynamic_attr_bit(6, "krt_lock"); } ;
+attr_bit: KRT_LOCK_CWND { $$ = f_new_dynamic_attr_bit(7, "krt_lock"); } ;
+attr_bit: KRT_LOCK_ADVMSS { $$ = f_new_dynamic_attr_bit(8, "krt_lock"); } ;
+attr_bit: KRT_LOCK_REORDERING { $$ = f_new_dynamic_attr_bit(9, "krt_lock"); } ;
+attr_bit: KRT_LOCK_HOPLIMIT { $$ = f_new_dynamic_attr_bit(10, "krt_lock"); } ;
+attr_bit: KRT_LOCK_RTO_MIN { $$ = f_new_dynamic_attr_bit(13, "krt_lock"); } ;
+
+/* Bits of EA_KRT_FEATURES */
+attr_bit: KRT_FEATURE_ECN { $$ = f_new_dynamic_attr_bit(0, "krt_features"); } ;
+attr_bit: KRT_FEATURE_ALLFRAG { $$ = f_new_dynamic_attr_bit(3, "krt_features"); } ;
CF_CODE
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index 8da26e37..94a37a73 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -17,7 +17,7 @@
#undef LOCAL_DEBUG
#include "nest/bird.h"
-#include "nest/route.h"
+#include "nest/rt.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "lib/alloca.h"
@@ -26,6 +26,7 @@
#include "lib/socket.h"
#include "lib/string.h"
#include "lib/hash.h"
+#include "lib/macro.h"
#include "conf/conf.h"
#include <asm/types.h>
@@ -87,6 +88,101 @@ struct nl_parse_state
};
/*
+ * Netlink eattr definitions
+ */
+
+#define KRT_METRICS_MAX ARRAY_SIZE(ea_krt_metrics)
+#define KRT_FEATURES_MAX 4
+
+static void krt_bitfield_format(const eattr *e, byte *buf, uint buflen);
+
+static struct ea_class
+ ea_krt_prefsrc = {
+ .name = "krt_prefsrc",
+ .type = T_IP,
+ },
+ ea_krt_realm = {
+ .name = "krt_realm",
+ .type = T_INT,
+ },
+ ea_krt_scope = {
+ .name = "krt_scope",
+ .type = T_INT,
+ };
+
+static struct ea_class ea_krt_metrics[] = {
+ [RTAX_LOCK] = {
+ .name = "krt_lock",
+ .type = T_INT,
+ .format = krt_bitfield_format,
+ },
+ [RTAX_FEATURES] = {
+ .name = "krt_features",
+ .type = T_INT,
+ .format = krt_bitfield_format,
+ },
+#define KRT_METRIC_INT(_rtax, _name) [_rtax] = { .name = _name, .type = T_INT }
+ KRT_METRIC_INT(RTAX_MTU, "krt_mtu"),
+ KRT_METRIC_INT(RTAX_WINDOW, "krt_window"),
+ KRT_METRIC_INT(RTAX_RTT, "krt_rtt"),
+ KRT_METRIC_INT(RTAX_RTTVAR, "krt_rttvar"),
+ KRT_METRIC_INT(RTAX_SSTHRESH, "krt_sstresh"),
+ KRT_METRIC_INT(RTAX_CWND, "krt_cwnd"),
+ KRT_METRIC_INT(RTAX_ADVMSS, "krt_advmss"),
+ KRT_METRIC_INT(RTAX_REORDERING, "krt_reordering"),
+ KRT_METRIC_INT(RTAX_HOPLIMIT, "krt_hoplimit"),
+ KRT_METRIC_INT(RTAX_INITCWND, "krt_initcwnd"),
+ KRT_METRIC_INT(RTAX_RTO_MIN, "krt_rto_min"),
+ KRT_METRIC_INT(RTAX_INITRWND, "krt_initrwnd"),
+ KRT_METRIC_INT(RTAX_QUICKACK, "krt_quickack"),
+#undef KRT_METRIC_INT
+};
+
+static const char *krt_metrics_names[KRT_METRICS_MAX] = {
+ NULL, "lock", "mtu", "window", "rtt", "rttvar", "sstresh", "cwnd", "advmss",
+ "reordering", "hoplimit", "initcwnd", "features", "rto_min", "initrwnd", "quickack"
+};
+
+static const char *krt_features_names[KRT_FEATURES_MAX] = {
+ "ecn", NULL, NULL, "allfrag"
+};
+
+static void
+krt_bitfield_format(const eattr *a, byte *buf, uint buflen)
+{
+ if (a->id == ea_krt_metrics[RTAX_LOCK].id)
+ ea_format_bitfield(a, buf, buflen, krt_metrics_names, 2, KRT_METRICS_MAX);
+ else if (a->id == ea_krt_metrics[RTAX_FEATURES].id)
+ ea_format_bitfield(a, buf, buflen, krt_features_names, 0, KRT_FEATURES_MAX);
+}
+
+static void
+nl_ea_register(void)
+{
+ EA_REGISTER_ALL(
+ &ea_krt_prefsrc,
+ &ea_krt_realm,
+ &ea_krt_scope
+ );
+
+ for (uint i = 0; i < KRT_METRICS_MAX; i++)
+ {
+ if (!ea_krt_metrics[i].name)
+ ea_krt_metrics[i] = (struct ea_class) {
+ .name = mb_sprintf(&root_pool, "krt_metric_%d", i),
+ .type = T_INT,
+ };
+
+ ea_register_init(&ea_krt_metrics[i]);
+ }
+
+ for (uint i = 1; i < KRT_METRICS_MAX; i++)
+ ASSERT_DIE(ea_krt_metrics[i].id == ea_krt_metrics[0].id + i);
+}
+
+
+
+/*
* Synchronous Netlink interface
*/
@@ -712,12 +808,12 @@ nl_add_nexthop(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af UNUS
}
static void
-nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af, ea_list *eattrs)
+nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct nexthop_adata *nhad, int af, ea_list *eattrs)
{
struct rtattr *a = nl_open_attr(h, bufsize, RTA_MULTIPATH);
- eattr *flow = ea_find(eattrs, EA_KRT_REALM);
+ eattr *flow = ea_find(eattrs, &ea_krt_realm);
- for (; nh; nh = nh->next)
+ NEXTHOP_WALK(nh, nhad)
{
struct rtnexthop *rtnh = nl_open_nexthop(h, bufsize);
@@ -741,31 +837,44 @@ nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af, e
nl_close_attr(h, a);
}
-static struct nexthop *
+static struct nexthop_adata *
nl_parse_multipath(struct nl_parse_state *s, struct krt_proto *p, const net_addr *n, struct rtattr *ra, int af, int krt_src)
{
struct rtattr *a[BIRD_RTA_MAX];
- struct rtnexthop *nh = RTA_DATA(ra);
- struct nexthop *rv, *first, **last;
- unsigned len = RTA_PAYLOAD(ra);
+ struct rtnexthop *nh, *orig_nh = RTA_DATA(ra);
+ unsigned len, orig_len = RTA_PAYLOAD(ra);
+ uint cnt = 0;
+
+ /* First count the nexthops */
+ for (len = orig_len, nh = orig_nh; len; len -= NLMSG_ALIGN(nh->rtnh_len), nh = RTNH_NEXT(nh))
+ {
+ /* Use RTNH_OK(nh,len) ?? */
+ if ((len < sizeof(*nh)) || (len < nh->rtnh_len))
+ goto err;
+
+ if ((nh->rtnh_flags & RTNH_F_DEAD) && (krt_src != KRT_SRC_BIRD))
+ ;
+ else
+ cnt++;
+ }
- first = NULL;
- last = &first;
+ struct nexthop_adata *nhad = lp_allocz(s->pool, cnt * NEXTHOP_MAX_SIZE + sizeof *nhad);
+ struct nexthop *rv = &nhad->nh;
- while (len)
+ for (len = orig_len, nh = orig_nh; len; len -= NLMSG_ALIGN(nh->rtnh_len), nh = RTNH_NEXT(nh))
{
/* Use RTNH_OK(nh,len) ?? */
if ((len < sizeof(*nh)) || (len < nh->rtnh_len))
goto err;
if ((nh->rtnh_flags & RTNH_F_DEAD) && (krt_src != KRT_SRC_BIRD))
- goto next;
+ continue;
- *last = rv = lp_allocz(s->pool, NEXTHOP_MAX_SIZE);
- last = &(rv->next);
+ *rv = (struct nexthop) {
+ .weight = nh->rtnh_hops,
+ .iface = if_find_by_index(nh->rtnh_ifindex),
+ };
- rv->weight = nh->rtnh_hops;
- rv->iface = if_find_by_index(nh->rtnh_ifindex);
if (!rv->iface)
{
log(L_ERR "KRT: Received route %N with unknown ifindex %u", n, nh->rtnh_ifindex);
@@ -844,16 +953,14 @@ nl_parse_multipath(struct nl_parse_state *s, struct krt_proto *p, const net_addr
}
#endif
- next:
- len -= NLMSG_ALIGN(nh->rtnh_len);
- nh = RTNH_NEXT(nh);
+ rv = NEXTHOP_NEXT(rv);
}
- /* Ensure nexthops are sorted to satisfy nest invariant */
- if (!nexthop_is_sorted(first))
- first = nexthop_sort(first);
+ /* Store final length */
+ nhad->ad.length = (void *) rv - (void *) nhad->ad.data;
- return first;
+ /* Ensure nexthops are sorted to satisfy nest invariant */
+ return nexthop_is_sorted(nhad) ? nhad : nexthop_sort(nhad, s->pool);
err:
log(L_ERR "KRT: Received strange multipath route %N", n);
@@ -1281,11 +1388,16 @@ HASH_DEFINE_REHASH_FN(RTH, struct krt_proto)
int
krt_capable(rte *e)
{
- rta *a = e->attrs;
+ eattr *ea = ea_find(e->attrs, &ea_gen_nexthop);
+ if (!ea)
+ return 0;
- switch (a->dest)
+ struct nexthop_adata *nhad = (void *) ea->u.ptr;
+ if (NEXTHOP_IS_REACHABLE(nhad))
+ return 1;
+
+ switch (nhad->dest)
{
- case RTD_UNICAST:
case RTD_BLACKHOLE:
case RTD_UNREACHABLE:
case RTD_PROHIBIT:
@@ -1297,22 +1409,24 @@ krt_capable(rte *e)
}
static inline int
-nh_bufsize(struct nexthop *nh)
+nh_bufsize(struct nexthop_adata *nhad)
{
int rv = 0;
- for (; nh != NULL; nh = nh->next)
+ NEXTHOP_WALK(nh, nhad)
rv += RTNH_LENGTH(RTA_LENGTH(sizeof(ip_addr)));
return rv;
}
static int
-nl_send_route(struct krt_proto *p, rte *e, int op)
+nl_send_route(struct krt_proto *p, const rte *e, int op)
{
eattr *ea;
- net *net = e->net;
- rta *a = e->attrs;
- ea_list *eattrs = a->eattrs;
- int bufsize = 128 + KRT_METRICS_MAX*8 + nh_bufsize(&(a->nh));
+ ea_list *eattrs = e->attrs;
+ eattr *nhea = ea_find(eattrs, &ea_gen_nexthop);
+ struct nexthop_adata *nh = nhea ? (struct nexthop_adata *) nhea->u.ptr : NULL;
+ int dest = nhea_dest(nhea);
+
+ int bufsize = 128 + KRT_METRICS_MAX*8 + (nh ? nh_bufsize(nh) : 0);
u32 priority = 0;
struct {
@@ -1324,7 +1438,7 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
int rsize = sizeof(*r) + bufsize;
r = alloca(rsize);
- DBG("nl_send_route(%N,op=%x)\n", net->n.addr, op);
+ DBG("nl_send_route(%N,op=%x)\n", e->net, op);
bzero(&r->h, sizeof(r->h));
bzero(&r->r, sizeof(r->r));
@@ -1333,7 +1447,7 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
r->h.nlmsg_flags = op | NLM_F_REQUEST | NLM_F_ACK;
r->r.rtm_family = p->af;
- r->r.rtm_dst_len = net_pxlen(net->n.addr);
+ r->r.rtm_dst_len = net_pxlen(e->net);
r->r.rtm_protocol = RTPROT_BIRD;
r->r.rtm_scope = RT_SCOPE_NOWHERE;
#ifdef HAVE_MPLS_KERNEL
@@ -1345,7 +1459,7 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
* 2) Never use RTA_PRIORITY
*/
- u32 label = net_mpls(net->n.addr);
+ u32 label = net_mpls(e->net);
nl_add_attr_mpls(&r->h, rsize, RTA_DST, 1, &label);
r->r.rtm_scope = RT_SCOPE_UNIVERSE;
r->r.rtm_type = RTN_UNICAST;
@@ -1353,12 +1467,12 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
else
#endif
{
- nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(net->n.addr));
+ nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(e->net));
/* Add source address for IPv6 SADR routes */
- if (net->n.addr->type == NET_IP6_SADR)
+ if (e->net->type == NET_IP6_SADR)
{
- net_addr_ip6_sadr *a = (void *) &net->n.addr;
+ net_addr_ip6_sadr *a = (void *) &e->net;
nl_add_attr_ip6(&r->h, rsize, RTA_SRC, a->src_prefix);
r->r.rtm_src_len = a->src_pxlen;
}
@@ -1380,7 +1494,7 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
priority = 0;
else if (KRT_CF->sys.metric)
priority = KRT_CF->sys.metric;
- else if ((op != NL_OP_DELETE) && (ea = ea_find(eattrs, EA_KRT_METRIC)))
+ else if ((op != NL_OP_DELETE) && (ea = ea_find(eattrs, &ea_krt_metric)))
priority = ea->u.data;
if (priority)
@@ -1393,17 +1507,17 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
/* Default scope is LINK for device routes, UNIVERSE otherwise */
if (p->af == AF_MPLS)
r->r.rtm_scope = RT_SCOPE_UNIVERSE;
- else if (ea = ea_find(eattrs, EA_KRT_SCOPE))
+ else if (ea = ea_find(eattrs, &ea_krt_scope))
r->r.rtm_scope = ea->u.data;
- else if (a->dest == RTD_UNICAST && ipa_zero(a->nh.gw))
+ else if (dest == RTD_UNICAST && ipa_zero(nh->nh.gw))
r->r.rtm_scope = RT_SCOPE_LINK;
else
r->r.rtm_scope = RT_SCOPE_UNIVERSE;
- if (ea = ea_find(eattrs, EA_KRT_PREFSRC))
+ if (ea = ea_find(eattrs, &ea_krt_prefsrc))
nl_add_attr_ipa(&r->h, rsize, RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
- if (ea = ea_find(eattrs, EA_KRT_REALM))
+ if (ea = ea_find(eattrs, &ea_krt_realm))
nl_add_attr_u32(&r->h, rsize, RTA_FLOW, ea->u.data);
@@ -1411,9 +1525,9 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
metrics[0] = 0;
struct ea_walk_state ews = { .eattrs = eattrs };
- while (ea = ea_walk(&ews, EA_KRT_METRICS, KRT_METRICS_MAX))
+ while (ea = ea_walk(&ews, ea_krt_metrics[0].id, KRT_METRICS_MAX))
{
- int id = ea->id - EA_KRT_METRICS;
+ int id = ea->id - ea_krt_metrics[0].id;
metrics[0] |= 1 << id;
metrics[id] = ea->u.data;
}
@@ -1421,19 +1535,18 @@ nl_send_route(struct krt_proto *p, rte *e, int op)
if (metrics[0])
nl_add_metrics(&r->h, rsize, metrics, KRT_METRICS_MAX);
- switch (a->dest)
+ switch (dest)
{
case RTD_UNICAST:
r->r.rtm_type = RTN_UNICAST;
- struct nexthop *nh = &(a->nh);
- if (nh->next)
+ if (!NEXTHOP_ONE(nh))
nl_add_multipath(&r->h, rsize, nh, p->af, eattrs);
else
{
- nl_add_attr_u32(&r->h, rsize, RTA_OIF, nh->iface->index);
- nl_add_nexthop(&r->h, rsize, nh, p->af);
+ nl_add_attr_u32(&r->h, rsize, RTA_OIF, nh->nh.iface->index);
+ nl_add_nexthop(&r->h, rsize, &nh->nh, p->af);
- if (nh->flags & RNF_ONLINK)
+ if (nh->nh.flags & RNF_ONLINK)
r->r.rtm_flags |= RTNH_F_ONLINK;
}
break;
@@ -1479,12 +1592,15 @@ nl_allow_replace(struct krt_proto *p, rte *new)
if (krt_ipv4(p))
return 1;
- rta *a = new->attrs;
- return (a->dest == RTD_UNICAST) && ipa_nonzero(a->nh.gw);
+ eattr *nhea = ea_find(new->attrs, &ea_gen_nexthop);
+ struct nexthop_adata *nh = nhea ? (struct nexthop_adata *) nhea->u.ptr : NULL;
+ int dest = nhea_dest(nhea);
+
+ return (dest == RTD_UNICAST) && ipa_nonzero(nh->nh.gw);
}
void
-krt_replace_rte(struct krt_proto *p, net *n UNUSED, rte *new, rte *old)
+krt_replace_rte(struct krt_proto *p, const net_addr *n UNUSED, rte *new, const rte *old)
{
int err = 0;
@@ -1637,107 +1753,120 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
krt_src = KRT_SRC_ALIEN;
}
- net_addr *n = &dst;
+ net_addr *net = &dst;
if (p->p.net_type == NET_IP6_SADR)
{
- n = alloca(sizeof(net_addr_ip6_sadr));
- net_fill_ip6_sadr(n, net6_prefix(&dst), net6_pxlen(&dst),
+ net = alloca(sizeof(net_addr_ip6_sadr));
+ net_fill_ip6_sadr(net, net6_prefix(&dst), net6_pxlen(&dst),
net6_prefix(&src), net6_pxlen(&src));
}
- net *net = net_get(p->p.main_channel->table, n);
-
- rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE);
- ra->source = RTS_INHERIT;
- ra->scope = SCOPE_UNIVERSE;
-
- {
- ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + 2 * sizeof(eattr));
- *ea = (ea_list) { .flags = EALF_SORTED, .count = 2 };
- ea->next = ra->eattrs;
- ra->eattrs = ea;
-
- ea->attrs[0] = (eattr) {
- .id = EA_KRT_SOURCE,
- .type = EAF_TYPE_INT,
- .u.data = i->rtm_protocol
- };
-
- ea->attrs[1] = (eattr) {
- .id = EA_KRT_METRIC,
- .type = EAF_TYPE_INT,
- .u.data = priority,
- };
- }
+ ea_list *ra = NULL;
+ ea_set_attr_u32(&ra, &ea_gen_source, 0, RTS_INHERIT);
+ ea_set_attr_u32(&ra, &ea_krt_source, 0, i->rtm_protocol);
+ ea_set_attr_u32(&ra, &ea_krt_metric, 0, priority);
if (a[RTA_FLOW])
s->rta_flow = rta_get_u32(a[RTA_FLOW]);
else
s->rta_flow = 0;
+ union {
+ struct {
+ struct adata ad;
+ struct nexthop nh;
+ u32 labels[MPLS_MAX_LABEL_STACK];
+ };
+ struct nexthop_adata nhad;
+ } nhad = {};
+
switch (i->rtm_type)
{
case RTN_UNICAST:
- ra->dest = RTD_UNICAST;
-
if (a[RTA_MULTIPATH])
{
- struct nexthop *nh = nl_parse_multipath(s, p, n, a[RTA_MULTIPATH], i->rtm_family, krt_src);
+ struct nexthop_adata *nh = nl_parse_multipath(s, p, net, a[RTA_MULTIPATH], i->rtm_family, krt_src);
if (!nh)
SKIP("strange RTA_MULTIPATH\n");
- nexthop_link(ra, nh);
+ ea_set_attr(&ra, EA_LITERAL_DIRECT_ADATA(
+ &ea_gen_nexthop, 0, &nh->ad));
break;
}
if ((i->rtm_flags & RTNH_F_DEAD) && (krt_src != KRT_SRC_BIRD))
SKIP("ignore RTNH_F_DEAD\n");
- ra->nh.iface = if_find_by_index(oif);
- if (!ra->nh.iface)
+ nhad.nh.iface = if_find_by_index(oif);
+ if (!nhad.nh.iface)
{
- log(L_ERR "KRT: Received route %N with unknown ifindex %u", net->n.addr, oif);
+ log(L_ERR "KRT: Received route %N with unknown ifindex %u", net, oif);
return;
}
if (a[RTA_GATEWAY])
- ra->nh.gw = rta_get_ipa(a[RTA_GATEWAY]);
+ nhad.nh.gw = rta_get_ipa(a[RTA_GATEWAY]);
#ifdef HAVE_MPLS_KERNEL
if (a[RTA_VIA])
- ra->nh.gw = rta_get_via(a[RTA_VIA]);
+ nhad.nh.gw = rta_get_via(a[RTA_VIA]);
#endif
- if (ipa_nonzero(ra->nh.gw))
+ if (ipa_nonzero(nhad.nh.gw))
{
/* Silently skip strange 6to4 routes */
const net_addr_ip6 sit = NET_ADDR_IP6(IP6_NONE, 96);
- if ((i->rtm_family == AF_INET6) && ipa_in_netX(ra->nh.gw, (net_addr *) &sit))
+ if ((i->rtm_family == AF_INET6) && ipa_in_netX(nhad.nh.gw, (net_addr *) &sit))
return;
if (i->rtm_flags & RTNH_F_ONLINK)
- ra->nh.flags |= RNF_ONLINK;
+ nhad.nh.flags |= RNF_ONLINK;
neighbor *nbr;
- nbr = neigh_find(&p->p, ra->nh.gw, ra->nh.iface,
- (ra->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
+ nbr = neigh_find(&p->p, nhad.nh.gw, nhad.nh.iface,
+ (nhad.nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
if (!nbr || (nbr->scope == SCOPE_HOST))
{
- log(L_ERR "KRT: Received route %N with strange next-hop %I", net->n.addr,
- ra->nh.gw);
+ log(L_ERR "KRT: Received route %N with strange next-hop %I", net,
+ nhad.nh.gw);
return;
}
}
+#ifdef HAVE_MPLS_KERNEL
+ if ((i->rtm_family == AF_MPLS) && a[RTA_NEWDST] && !a[RTA_MULTIPATH])
+ nhad.nh.labels = rta_get_mpls(a[RTA_NEWDST], nhad.nh.label);
+
+ if (a[RTA_ENCAP] && a[RTA_ENCAP_TYPE] && !a[RTA_MULTIPATH])
+ {
+ switch (rta_get_u16(a[RTA_ENCAP_TYPE]))
+ {
+ case LWTUNNEL_ENCAP_MPLS:
+ {
+ struct rtattr *enca[BIRD_RTA_MAX];
+ nl_attr_len = RTA_PAYLOAD(a[RTA_ENCAP]);
+ nl_parse_attrs(RTA_DATA(a[RTA_ENCAP]), encap_mpls_want, enca, sizeof(enca));
+ nhad.nh.labels = rta_get_mpls(enca[RTA_DST], nhad.nh.label);
+ break;
+ }
+ default:
+ SKIP("unknown encapsulation method %d\n", rta_get_u16(a[RTA_ENCAP_TYPE]));
+ break;
+ }
+ }
+#endif
+
+ /* Finalize the nexthop */
+ nhad.ad.length = (void *) NEXTHOP_NEXT(&nhad.nh) - (void *) nhad.ad.data;
break;
case RTN_BLACKHOLE:
- ra->dest = RTD_BLACKHOLE;
+ nhad.nhad = NEXTHOP_DEST_LITERAL(RTD_BLACKHOLE);
break;
case RTN_UNREACHABLE:
- ra->dest = RTD_UNREACHABLE;
+ nhad.nhad = NEXTHOP_DEST_LITERAL(RTD_UNREACHABLE);
break;
case RTN_PROHIBIT:
- ra->dest = RTD_PROHIBIT;
+ nhad.nhad = NEXTHOP_DEST_LITERAL(RTD_PROHIBIT);
break;
/* FIXME: What about RTN_THROW? */
default:
@@ -1745,118 +1874,47 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
return;
}
-#ifdef HAVE_MPLS_KERNEL
- if ((i->rtm_family == AF_MPLS) && a[RTA_NEWDST] && !ra->nh.next)
- ra->nh.labels = rta_get_mpls(a[RTA_NEWDST], ra->nh.label);
-
- if (a[RTA_ENCAP] && a[RTA_ENCAP_TYPE] && !ra->nh.next)
- {
- switch (rta_get_u16(a[RTA_ENCAP_TYPE]))
- {
- case LWTUNNEL_ENCAP_MPLS:
- {
- struct rtattr *enca[BIRD_RTA_MAX];
- nl_attr_len = RTA_PAYLOAD(a[RTA_ENCAP]);
- nl_parse_attrs(RTA_DATA(a[RTA_ENCAP]), encap_mpls_want, enca, sizeof(enca));
- ra->nh.labels = rta_get_mpls(enca[RTA_DST], ra->nh.label);
- break;
- }
- default:
- SKIP("unknown encapsulation method %d\n", rta_get_u16(a[RTA_ENCAP_TYPE]));
- break;
- }
- }
-#endif
-
if (i->rtm_scope != def_scope)
- {
- ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr));
- ea->next = ra->eattrs;
- ra->eattrs = ea;
- ea->flags = EALF_SORTED;
- ea->count = 1;
- ea->attrs[0] = (eattr) {
- .id = EA_KRT_SCOPE,
- .flags = 0,
- .type = EAF_TYPE_INT,
- .u.data = i->rtm_scope,
- };
- }
+ ea_set_attr(&ra,
+ EA_LITERAL_EMBEDDED(&ea_krt_scope, 0, i->rtm_scope));
if (a[RTA_PREFSRC])
- {
- ip_addr ps = rta_get_ipa(a[RTA_PREFSRC]);
-
- struct adata *ad = lp_alloc(s->pool, sizeof(struct adata) + sizeof(ps));
- ad->length = sizeof(ps);
- memcpy(ad->data, &ps, sizeof(ps));
-
- ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr));
- ea->next = ra->eattrs;
- ra->eattrs = ea;
- ea->flags = EALF_SORTED;
- ea->count = 1;
- ea->attrs[0] = (eattr) {
- .id = EA_KRT_PREFSRC,
- .flags = 0,
- .type = EAF_TYPE_IP_ADDRESS,
- .u.ptr = ad,
- };
- }
+ {
+ ip_addr ps = rta_get_ipa(a[RTA_PREFSRC]);
+
+ ea_set_attr(&ra,
+ EA_LITERAL_STORE_ADATA(&ea_krt_prefsrc, 0, &ps, sizeof(ps)));
+ }
/* Can be set per-route or per-nexthop */
if (s->rta_flow)
- {
- ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr));
- ea->next = ra->eattrs;
- ra->eattrs = ea;
- ea->flags = EALF_SORTED;
- ea->count = 1;
- ea->attrs[0] = (eattr) {
- .id = EA_KRT_REALM,
- .flags = 0,
- .type = EAF_TYPE_INT,
- .u.data = s->rta_flow,
- };
- }
+ ea_set_attr(&ra,
+ EA_LITERAL_EMBEDDED(&ea_krt_realm, 0, s->rta_flow));
if (a[RTA_METRICS])
{
u32 metrics[KRT_METRICS_MAX];
- ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + KRT_METRICS_MAX * sizeof(eattr));
- int t, n = 0;
-
if (nl_parse_metrics(a[RTA_METRICS], metrics, ARRAY_SIZE(metrics)) < 0)
{
- log(L_ERR "KRT: Received route %N with strange RTA_METRICS attribute", net->n.addr);
+ log(L_ERR "KRT: Received route %N with strange RTA_METRICS attribute", net);
return;
}
- for (t = 1; t < KRT_METRICS_MAX; t++)
+ for (uint t = 1; t < KRT_METRICS_MAX; t++)
if (metrics[0] & (1 << t))
- ea->attrs[n++] = (eattr) {
- .id = EA_CODE(PROTOCOL_KERNEL, KRT_METRICS_OFFSET + t),
- .flags = 0,
- .type = EAF_TYPE_INT, /* FIXME: Some are EAF_TYPE_BITFIELD */
- .u.data = metrics[t],
- };
-
- if (n > 0)
- {
- ea->next = ra->eattrs;
- ea->flags = EALF_SORTED;
- ea->count = n;
- ra->eattrs = ea;
- }
+ ea_set_attr(&ra,
+ EA_LITERAL_EMBEDDED(&ea_krt_metrics[t], 0, metrics[t]));
}
- rte *e = rte_get_temp(ra, p->p.main_source);
- e->net = net;
+ rte e0 = {
+ .net = net,
+ .attrs = ra,
+ };
if (s->scan)
- krt_got_route(p, e, krt_src);
+ krt_got_route(p, &e0, krt_src);
else
- krt_got_route_async(p, e, new, krt_src);
+ krt_got_route_async(p, &e0, new, krt_src);
lp_flush(s->pool);
}
@@ -2067,6 +2125,8 @@ krt_sys_io_init(void)
{
nl_linpool = lp_new_default(krt_pool);
HASH_INIT(nl_table_map, krt_pool, 6);
+
+ nl_ea_register();
}
int
@@ -2120,56 +2180,6 @@ krt_sys_copy_config(struct krt_config *d, struct krt_config *s)
d->sys.metric = s->sys.metric;
}
-static const char *krt_metrics_names[KRT_METRICS_MAX] = {
- NULL, "lock", "mtu", "window", "rtt", "rttvar", "sstresh", "cwnd", "advmss",
- "reordering", "hoplimit", "initcwnd", "features", "rto_min", "initrwnd", "quickack"
-};
-
-static const char *krt_features_names[KRT_FEATURES_MAX] = {
- "ecn", NULL, NULL, "allfrag"
-};
-
-int
-krt_sys_get_attr(const eattr *a, byte *buf, int buflen UNUSED)
-{
- switch (a->id)
- {
- case EA_KRT_PREFSRC:
- bsprintf(buf, "prefsrc");
- return GA_NAME;
-
- case EA_KRT_REALM:
- bsprintf(buf, "realm");
- return GA_NAME;
-
- case EA_KRT_SCOPE:
- bsprintf(buf, "scope");
- return GA_NAME;
-
- case EA_KRT_LOCK:
- buf += bsprintf(buf, "lock:");
- ea_format_bitfield(a, buf, buflen, krt_metrics_names, 2, KRT_METRICS_MAX);
- return GA_FULL;
-
- case EA_KRT_FEATURES:
- buf += bsprintf(buf, "features:");
- ea_format_bitfield(a, buf, buflen, krt_features_names, 0, KRT_FEATURES_MAX);
- return GA_FULL;
-
- default:;
- int id = (int)EA_ID(a->id) - KRT_METRICS_OFFSET;
- if (id > 0 && id < KRT_METRICS_MAX)
- {
- bsprintf(buf, "%s", krt_metrics_names[id]);
- return GA_NAME;
- }
-
- return GA_UNKNOWN;
- }
-}
-
-
-
void
kif_sys_start(struct kif_proto *p UNUSED)
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 13:15:02 +0000