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Merge tag 'v1.6.2' into int-new

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This commit is contained in:
Ondrej Zajicek (work)
2016-11-08 17:03:31 +01:00
parent 5de0e848de f51b1f5565
commit cc5b93f72d
40 changed files with 988 additions and 338 deletions
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7
sysdep/bsd/krt-sock.c
View File

@@ -946,6 +946,12 @@ krt_sock_hook(sock *sk, int size UNUSED)
return 0;
}
static void
krt_sock_err_hook(sock *sk, int e UNUSED)
{
krt_sock_hook(sk, 0);
}
static sock *
krt_sock_open(pool *pool, void *data, int table_id)
{
@@ -967,6 +973,7 @@ krt_sock_open(pool *pool, void *data, int table_id)
sk = sk_new(pool);
sk->type = SK_MAGIC;
sk->rx_hook = krt_sock_hook;
sk->err_hook = krt_sock_err_hook;
sk->fd = fd;
sk->data = data;

2
sysdep/config.h
View File

@@ -7,7 +7,7 @@
#define _BIRD_CONFIG_H_
/* BIRD version */
#define BIRD_VERSION "1.6.0"
#define BIRD_VERSION "1.6.2"
/* Include parameters determined by configure script */
#include "sysdep/autoconf.h"

4
sysdep/linux/krt-sys.h
View File

@@ -32,8 +32,11 @@ static inline struct ifa * kif_get_primary_ip(struct iface *i) { return NULL; }
/* Kernel routes */
#define KRT_ALLOW_MERGE_PATHS 1
#define EA_KRT_PREFSRC EA_CODE(EAP_KRT, 0x10)
#define EA_KRT_REALM EA_CODE(EAP_KRT, 0x11)
#define EA_KRT_SCOPE EA_CODE(EAP_KRT, 0x12)
#define KRT_METRICS_MAX 0x10 /* RTAX_QUICKACK+1 */
@@ -86,6 +89,7 @@ static inline struct ifa * kif_get_primary_ip(struct iface *i) { return NULL; }
struct krt_params {
u32 table_id; /* Kernel table ID we sync with */
u32 metric; /* Kernel metric used for all routes */
};
struct krt_state {

10
sysdep/linux/netlink.Y
View File

@@ -10,8 +10,8 @@ CF_HDR
CF_DECLS
CF_KEYWORDS(KERNEL, TABLE, KRT_PREFSRC, KRT_REALM, KRT_MTU, KRT_WINDOW, KRT_RTT,
KRT_RTTVAR, KRT_SSTRESH, KRT_CWND, KRT_ADVMSS, KRT_REORDERING,
CF_KEYWORDS(KERNEL, TABLE, METRIC, 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,
@@ -22,13 +22,13 @@ CF_GRAMMAR
CF_ADDTO(kern_proto, kern_proto kern_sys_item ';')
kern_sys_item:
KERNEL TABLE expr {
THIS_KRT->sys.table_id = $3;
}
KERNEL TABLE expr { THIS_KRT->sys.table_id = $3; }
| METRIC expr { THIS_KRT->sys.metric = $2; }
;
CF_ADDTO(dynamic_attr, KRT_PREFSRC { $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_KRT_PREFSRC); })
CF_ADDTO(dynamic_attr, KRT_REALM { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_REALM); })
CF_ADDTO(dynamic_attr, KRT_SCOPE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SCOPE); })
CF_ADDTO(dynamic_attr, KRT_MTU { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_MTU); })
CF_ADDTO(dynamic_attr, KRT_WINDOW { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_WINDOW); })

432
sysdep/linux/netlink.c
View File

@@ -20,7 +20,6 @@
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "lib/alloca.h"
#include "sysdep/unix/timer.h"
#include "sysdep/unix/unix.h"
#include "sysdep/unix/krt.h"
@@ -39,6 +38,10 @@
#define MSG_TRUNC 0x20
#endif
#ifndef IFA_FLAGS
#define IFA_FLAGS 8
#endif
#ifndef IFF_LOWER_UP
#define IFF_LOWER_UP 0x10000
#endif
@@ -48,6 +51,45 @@
#endif
#define krt_ecmp6(p) ((p)->af == AF_INET6)
/*
* Structure nl_parse_state keeps state of received route processing. Ideally,
* we could just independently parse received Netlink messages and immediately
* propagate received routes to the rest of BIRD, but Linux kernel represents
* and announces IPv6 ECMP routes not as one route with multiple next hops (like
* RTA_MULTIPATH in IPv4 ECMP), but as a set of routes with the same prefix.
*
* Therefore, BIRD keeps currently processed route in nl_parse_state structure
* and postpones its propagation until we expect it to be final; i.e., when
* non-matching route is received or when the scan ends. When another matching
* route is received, it is merged with the already processed route to form an
* ECMP route. Note that merging is done only for IPv6 (merge == 1), but the
* postponing is done in both cases (for simplicity). All IPv4 routes are just
* considered non-matching.
*
* This is ignored for asynchronous notifications (every notification is handled
* as a separate route). It is not an issue for our routes, as we ignore such
* notifications anyways. But importing alien IPv6 ECMP routes does not work
* properly.
*/
struct nl_parse_state
{
struct linpool *pool;
int scan;
int merge;
net *net;
rta *attrs;
struct krt_proto *proto;
s8 new;
s8 krt_src;
u8 krt_type;
u8 krt_proto;
u32 krt_metric;
};
/*
* Synchronous Netlink interface
*/
@@ -63,6 +105,13 @@ struct nl_sock
#define NL_RX_SIZE 8192
#define NL_OP_DELETE 0
#define NL_OP_ADD (NLM_F_CREATE|NLM_F_EXCL)
#define NL_OP_REPLACE (NLM_F_CREATE|NLM_F_REPLACE)
#define NL_OP_APPEND (NLM_F_CREATE|NLM_F_APPEND)
static linpool *nl_linpool;
static struct nl_sock nl_scan = {.fd = -1}; /* Netlink socket for synchronous scan */
static struct nl_sock nl_req = {.fd = -1}; /* Netlink socket for requests */
@@ -166,7 +215,7 @@ nl_get_reply(struct nl_sock *nl)
static struct tbf rl_netlink_err = TBF_DEFAULT_LOG_LIMITS;
static int
nl_error(struct nlmsghdr *h)
nl_error(struct nlmsghdr *h, int ignore_esrch)
{
struct nlmsgerr *e;
int ec;
@@ -178,7 +227,7 @@ nl_error(struct nlmsghdr *h)
}
e = (struct nlmsgerr *) NLMSG_DATA(h);
ec = -e->error;
if (ec)
if (ec && !(ignore_esrch && (ec == ESRCH)))
log_rl(&rl_netlink_err, L_WARN "Netlink: %s", strerror(ec));
return ec;
}
@@ -192,14 +241,14 @@ nl_get_scan(void)
return NULL;
if (h->nlmsg_type == NLMSG_ERROR)
{
nl_error(h);
nl_error(h, 0);
return NULL;
}
return h;
}
static int
nl_exchange(struct nlmsghdr *pkt)
nl_exchange(struct nlmsghdr *pkt, int ignore_esrch)
{
struct nlmsghdr *h;
@@ -211,7 +260,7 @@ nl_exchange(struct nlmsghdr *pkt)
break;
log(L_WARN "nl_exchange: Unexpected reply received");
}
return nl_error(h) ? -1 : 0;
return nl_error(h, ignore_esrch) ? -1 : 0;
}
/*
@@ -248,17 +297,19 @@ static struct nl_want_attrs ifla_attr_want[BIRD_IFLA_MAX] = {
};
#define BIRD_IFA_MAX (IFA_ANYCAST+1)
#define BIRD_IFA_MAX (IFA_FLAGS+1)
static struct nl_want_attrs ifa_attr_want4[BIRD_IFA_MAX] = {
[IFA_ADDRESS] = { 1, 1, sizeof(ip4_addr) },
[IFA_LOCAL] = { 1, 1, sizeof(ip4_addr) },
[IFA_BROADCAST] = { 1, 1, sizeof(ip4_addr) },
[IFA_FLAGS] = { 1, 1, sizeof(u32) },
};
static struct nl_want_attrs ifa_attr_want6[BIRD_IFA_MAX] = {
[IFA_ADDRESS] = { 1, 1, sizeof(ip6_addr) },
[IFA_LOCAL] = { 1, 1, sizeof(ip6_addr) },
[IFA_FLAGS] = { 1, 1, sizeof(u32) },
};
@@ -627,6 +678,7 @@ nl_parse_addr4(struct ifaddrmsg *i, int scan, int new)
{
struct rtattr *a[BIRD_IFA_MAX];
struct iface *ifi;
u32 ifa_flags;
int scope;
if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want4, a, sizeof(a)))
@@ -650,10 +702,15 @@ nl_parse_addr4(struct ifaddrmsg *i, int scan, int new)
return;
}
if (a[IFA_FLAGS])
ifa_flags = rta_get_u32(a[IFA_FLAGS]);
else
ifa_flags = i->ifa_flags;
struct ifa ifa;
bzero(&ifa, sizeof(ifa));
ifa.iface = ifi;
if (i->ifa_flags & IFA_F_SECONDARY)
if (ifa_flags & IFA_F_SECONDARY)
ifa.flags |= IA_SECONDARY;
ifa.ip = rta_get_ipa(a[IFA_LOCAL]);
@@ -730,6 +787,7 @@ nl_parse_addr6(struct ifaddrmsg *i, int scan, int new)
{
struct rtattr *a[BIRD_IFA_MAX];
struct iface *ifi;
u32 ifa_flags;
int scope;
if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want6, a, sizeof(a)))
@@ -748,14 +806,22 @@ nl_parse_addr6(struct ifaddrmsg *i, int scan, int new)
return;
}
if (a[IFA_FLAGS])
ifa_flags = rta_get_u32(a[IFA_FLAGS]);
else
ifa_flags = i->ifa_flags;
struct ifa ifa;
bzero(&ifa, sizeof(ifa));
ifa.iface = ifi;
if (i->ifa_flags & IFA_F_SECONDARY)
if (ifa_flags & IFA_F_SECONDARY)
ifa.flags |= IA_SECONDARY;
/* IFA_LOCAL can be unset for IPv6 interfaces */
/* Ignore tentative addresses silently */
if (ifa_flags & IFA_F_TENTATIVE)
return;
/* IFA_LOCAL can be unset for IPv6 interfaces */
ifa.ip = rta_get_ipa(a[IFA_LOCAL] ? : a[IFA_ADDRESS]);
if (i->ifa_prefixlen > IP6_MAX_PREFIX_LENGTH)
@@ -916,12 +982,13 @@ nh_bufsize(struct mpnh *nh)
}
static int
nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int dest, ip_addr gw, struct iface *iface)
{
eattr *ea;
net *net = e->net;
rta *a = e->attrs;
int bufsize = 128 + KRT_METRICS_MAX*8 + nh_bufsize(a->nexthops);
u32 priority = 0;
struct {
struct nlmsghdr h;
@@ -932,13 +999,13 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
int rsize = sizeof(*r) + bufsize;
r = alloca(rsize);
DBG("nl_send_route(%N,new=%d)\n", net->n.addr, new);
DBG("nl_send_route(%N,op=%x)\n", net->n.addr, op);
bzero(&r->h, sizeof(r->h));
bzero(&r->r, sizeof(r->r));
r->h.nlmsg_type = new ? RTM_NEWROUTE : RTM_DELROUTE;
r->h.nlmsg_type = op ? RTM_NEWROUTE : RTM_DELROUTE;
r->h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
r->h.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | (new ? NLM_F_CREATE|NLM_F_EXCL : 0);
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);
@@ -946,18 +1013,37 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
r->r.rtm_scope = RT_SCOPE_UNIVERSE;
nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(net->n.addr));
/*
* Strange behavior for RTM_DELROUTE:
* 1) rtm_family is ignored in IPv6, works for IPv4
* 2) not setting RTA_PRIORITY is different from setting default value (on IPv6)
* 3) not setting RTA_PRIORITY is equivalent to setting 0, which is wildcard
*/
if (krt_table_id(p) < 256)
r->r.rtm_table = krt_table_id(p);
else
nl_add_attr_u32(&r->h, rsize, RTA_TABLE, krt_table_id(p));
/* For route delete, we do not specify route attributes */
if (!new)
return nl_exchange(&r->h);
if (a->source == RTS_DUMMY)
priority = e->u.krt.metric;
else if (KRT_CF->sys.metric)
priority = KRT_CF->sys.metric;
else if ((op != NL_OP_DELETE) && (ea = ea_find(eattrs, EA_KRT_METRIC)))
priority = ea->u.data;
if (priority)
nl_add_attr_u32(&r->h, sizeof(r), RTA_PRIORITY, priority);
if (ea = ea_find(eattrs, EA_KRT_METRIC))
nl_add_attr_u32(&r->h, rsize, RTA_PRIORITY, ea->u.data);
/* For route delete, we do not specify remaining route attributes */
if (op == NL_OP_DELETE)
goto dest;
/* Default scope is LINK for device routes, UNIVERSE otherwise */
if (ea = ea_find(eattrs, EA_KRT_SCOPE))
r->r.rtm_scope = ea->u.data;
else
r->r.rtm_scope = (dest == RTD_DEVICE) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE;
if (ea = ea_find(eattrs, EA_KRT_PREFSRC))
nl_add_attr_ipa(&r->h, rsize, RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
@@ -981,18 +1067,18 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
nl_add_metrics(&r->h, rsize, metrics, KRT_METRICS_MAX);
dest:
/* a->iface != NULL checked in krt_capable() for router and device routes */
switch (a->dest)
switch (dest)
{
case RTD_ROUTER:
r->r.rtm_type = RTN_UNICAST;
nl_add_attr_u32(&r->h, rsize, RTA_OIF, a->iface->index);
nl_add_attr_ipa(&r->h, rsize, RTA_GATEWAY, a->gw);
nl_add_attr_u32(&r->h, rsize, RTA_OIF, iface->index);
nl_add_attr_ipa(&r->h, rsize, RTA_GATEWAY, gw);
break;
case RTD_DEVICE:
r->r.rtm_type = RTN_UNICAST;
nl_add_attr_u32(&r->h, rsize, RTA_OIF, a->iface->index);
nl_add_attr_u32(&r->h, rsize, RTA_OIF, iface->index);
break;
case RTD_BLACKHOLE:
r->r.rtm_type = RTN_BLACKHOLE;
@@ -1007,11 +1093,50 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
r->r.rtm_type = RTN_UNICAST;
nl_add_multipath(&r->h, rsize, a->nexthops);
break;
case RTD_NONE:
break;
default:
bug("krt_capable inconsistent with nl_send_route");
}
return nl_exchange(&r->h);
/* Ignore missing for DELETE */
return nl_exchange(&r->h, (op == NL_OP_DELETE));
}
static inline int
nl_add_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs)
{
rta *a = e->attrs;
int err = 0;
if (krt_ecmp6(p) && (a->dest == RTD_MULTIPATH))
{
struct mpnh *nh = a->nexthops;
err = nl_send_route(p, e, eattrs, NL_OP_ADD, RTD_ROUTER, nh->gw, nh->iface);
if (err < 0)
return err;
for (nh = nh->next; nh; nh = nh->next)
err += nl_send_route(p, e, eattrs, NL_OP_APPEND, RTD_ROUTER, nh->gw, nh->iface);
return err;
}
return nl_send_route(p, e, eattrs, NL_OP_ADD, a->dest, a->gw, a->iface);
}
static inline int
nl_delete_rte(struct krt_proto *p, rte *e, struct ea_list *eattrs)
{
int err = 0;
/* For IPv6, we just repeatedly request DELETE until we get error */
do
err = nl_send_route(p, e, eattrs, NL_OP_DELETE, RTD_NONE, IPA_NONE, NULL);
while (krt_ecmp6(p) && !err);
return err;
}
void
@@ -1020,17 +1145,21 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list
int err = 0;
/*
* NULL for eattr of the old route is a little hack, but we don't
* get proper eattrs for old in rt_notify() anyway. NULL means no
* extended route attributes and therefore matches if the kernel
* route has any of them.
* We could use NL_OP_REPLACE, but route replace on Linux has some problems:
*
* 1) Does not check for matching rtm_protocol
* 2) Has broken semantics for IPv6 ECMP
* 3) Crashes some kernel version when used for IPv6 ECMP
*
* So we use NL_OP_DELETE and then NL_OP_ADD. We also do not trust the old
* route value, so we do not try to optimize IPv6 ECMP reconfigurations.
*/
if (old)
nl_send_route(p, old, NULL, 0);
nl_delete_rte(p, old, eattrs);
if (new)
err = nl_send_route(p, new, eattrs, 1);
err = nl_add_rte(p, new, eattrs);
if (err < 0)
n->n.flags |= KRF_SYNC_ERROR;
@@ -1039,10 +1168,80 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list
}
static inline struct mpnh *
nl_alloc_mpnh(struct nl_parse_state *s, ip_addr gw, struct iface *iface, byte weight)
{
struct mpnh *nh = lp_alloc(s->pool, sizeof(struct mpnh));
nh->gw = gw;
nh->iface = iface;
nh->next = NULL;
nh->weight = weight;
return nh;
}
static int
nl_mergable_route(struct nl_parse_state *s, net *net, struct krt_proto *p, uint priority, uint krt_type)
{
/* Route merging must be active */
if (!s->merge)
return 0;
/* Saved and new route must have same network, proto/table, and priority */
if ((s->net != net) || (s->proto != p) || (s->krt_metric != priority))
return 0;
/* Both must be regular unicast routes */
if ((s->krt_type != RTN_UNICAST) || (krt_type != RTN_UNICAST))
return 0;
return 1;
}
static void
nl_announce_route(struct nl_parse_state *s)
{
rte *e = rte_get_temp(s->attrs);
e->net = s->net;
e->u.krt.src = s->krt_src;
e->u.krt.proto = s->krt_proto;
e->u.krt.seen = 0;
e->u.krt.best = 0;
e->u.krt.metric = s->krt_metric;
if (s->scan)
krt_got_route(s->proto, e);
else
krt_got_route_async(s->proto, e, s->new);
s->net = NULL;
s->attrs = NULL;
s->proto = NULL;
lp_flush(s->pool);
}
static inline void
nl_parse_begin(struct nl_parse_state *s, int scan, int merge)
{
memset(s, 0, sizeof (struct nl_parse_state));
s->pool = nl_linpool;
s->scan = scan;
s->merge = merge;
}
static inline void
nl_parse_end(struct nl_parse_state *s)
{
if (s->net)
nl_announce_route(s);
}
#define SKIP(ARG...) do { DBG("KRT: Ignoring route - " ARG); return; } while(0)
static void
nl_parse_route(struct nlmsghdr *h, int scan)
nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
{
struct krt_proto *p;
struct rtmsg *i;
@@ -1052,6 +1251,8 @@ nl_parse_route(struct nlmsghdr *h, int scan)
net_addr dst;
u32 oif = ~0;
u32 table_id;
u32 priority = 0;
u32 def_scope = RT_SCOPE_UNIVERSE;
int src;
if (!(i = nl_checkin(h, sizeof(*i))))
@@ -1069,9 +1270,9 @@ nl_parse_route(struct nlmsghdr *h, int scan)
net_fill_ip4(&dst, IP4_NONE, 0);
break;
case AF_INET6:
if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a)))
return;
case AF_INET6:
if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a)))
return;
if (a[RTA_DST])
net_fill_ip6(&dst, rta_get_ip6(a[RTA_DST]), i->rtm_dst_len);
@@ -1096,24 +1297,22 @@ nl_parse_route(struct nlmsghdr *h, int scan)
if (!p)
SKIP("unknown table %d\n", table);
if (a[RTA_IIF])
SKIP("IIF set\n");
if (i->rtm_tos != 0) /* We don't support TOS */
SKIP("TOS %02x\n", i->rtm_tos);
if (scan && !new)
if (s->scan && !new)
SKIP("RTM_DELROUTE in scan\n");
if (a[RTA_PRIORITY])
priority = rta_get_u32(a[RTA_PRIORITY]);
int c = net_classify(&dst);
if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
SKIP("strange class/scope\n");
// ignore rtm_scope, it is not a real scope
// if (i->rtm_scope != RT_SCOPE_UNIVERSE)
// SKIP("scope %u\n", i->rtm_scope);
switch (i->rtm_protocol)
{
case RTPROT_UNSPEC:
@@ -1128,7 +1327,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
return;
case RTPROT_BIRD:
if (!scan)
if (!s->scan)
SKIP("echo\n");
src = KRT_SRC_BIRD;
break;
@@ -1140,12 +1339,14 @@ nl_parse_route(struct nlmsghdr *h, int scan)
net *net = net_get(p->p.main_channel->table, &dst);
rta ra = {
.src= p->p.main_source,
.source = RTS_INHERIT,
.scope = SCOPE_UNIVERSE,
.cast = RTC_UNICAST
};
if (s->net && !nl_mergable_route(s, net, p, priority, i->rtm_type))
nl_announce_route(s);
rta *ra = lp_allocz(s->pool, sizeof(rta));
ra->src = p->p.main_source;
ra->source = RTS_INHERIT;
ra->scope = SCOPE_UNIVERSE;
ra->cast = RTC_UNICAST;
switch (i->rtm_type)
{
@@ -1153,9 +1354,9 @@ nl_parse_route(struct nlmsghdr *h, int scan)
if (a[RTA_MULTIPATH] && (i->rtm_family == AF_INET))
{
ra.dest = RTD_MULTIPATH;
ra.nexthops = nl_parse_multipath(p, a[RTA_MULTIPATH]);
if (!ra.nexthops)
ra->dest = RTD_MULTIPATH;
ra->nexthops = nl_parse_multipath(p, a[RTA_MULTIPATH]);
if (!ra->nexthops)
{
log(L_ERR "KRT: Received strange multipath route %N", net->n.addr);
return;
@@ -1164,8 +1365,8 @@ nl_parse_route(struct nlmsghdr *h, int scan)
break;
}
ra.iface = if_find_by_index(oif);
if (!ra.iface)
ra->iface = if_find_by_index(oif);
if (!ra->iface)
{
log(L_ERR "KRT: Received route %N with unknown ifindex %u", net->n.addr, oif);
return;
@@ -1173,37 +1374,38 @@ nl_parse_route(struct nlmsghdr *h, int scan)
if (a[RTA_GATEWAY])
{
ra.dest = RTD_ROUTER;
ra.gw = rta_get_ipa(a[RTA_GATEWAY]);
ra->dest = RTD_ROUTER;
ra->gw = rta_get_ipa(a[RTA_GATEWAY]);
/* 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.gw, (net_addr *) &sit))
if ((i->rtm_family == AF_INET6) && ipa_in_netX(ra->gw, (net_addr *) &sit))
return;
neighbor *nbr;
nbr = neigh_find2(&p->p, &ra.gw, ra.iface,
nbr = neigh_find2(&p->p, &ra->gw, ra->iface,
(i->rtm_flags & RTNH_F_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.gw);
log(L_ERR "KRT: Received route %N with strange next-hop %I", net->n.addr, ra->gw);
return;
}
}
else
{
ra.dest = RTD_DEVICE;
ra->dest = RTD_DEVICE;
def_scope = RT_SCOPE_LINK;
}
break;
case RTN_BLACKHOLE:
ra.dest = RTD_BLACKHOLE;
ra->dest = RTD_BLACKHOLE;
break;
case RTN_UNREACHABLE:
ra.dest = RTD_UNREACHABLE;
ra->dest = RTD_UNREACHABLE;
break;
case RTN_PROHIBIT:
ra.dest = RTD_PROHIBIT;
ra->dest = RTD_PROHIBIT;
break;
/* FIXME: What about RTN_THROW? */
default:
@@ -1211,39 +1413,41 @@ nl_parse_route(struct nlmsghdr *h, int scan)
return;
}
rte *e = rte_get_temp(&ra);
e->net = net;
e->u.krt.src = src;
e->u.krt.proto = i->rtm_protocol;
e->u.krt.seen = 0;
e->u.krt.best = 0;
e->u.krt.metric = 0;
if (a[RTA_PRIORITY])
e->u.krt.metric = rta_get_u32(a[RTA_PRIORITY]);
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].id = EA_KRT_SCOPE;
ea->attrs[0].flags = 0;
ea->attrs[0].type = EAF_TYPE_INT;
ea->attrs[0].u.data = i->rtm_scope;
}
if (a[RTA_PREFSRC])
{
ip_addr ps = rta_get_ipa(a[RTA_PREFSRC]);
ea_list *ea = alloca(sizeof(ea_list) + sizeof(eattr));
ea->next = ra.eattrs;
ra.eattrs = ea;
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].id = EA_KRT_PREFSRC;
ea->attrs[0].flags = 0;
ea->attrs[0].type = EAF_TYPE_IP_ADDRESS;
ea->attrs[0].u.ptr = alloca(sizeof(struct adata) + sizeof(ps));
ea->attrs[0].u.ptr = lp_alloc(s->pool, sizeof(struct adata) + sizeof(ps));
ea->attrs[0].u.ptr->length = sizeof(ps);
memcpy(ea->attrs[0].u.ptr->data, &ps, sizeof(ps));
}
if (a[RTA_FLOW])
{
ea_list *ea = alloca(sizeof(ea_list) + sizeof(eattr));
ea->next = ra.eattrs;
ra.eattrs = ea;
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].id = EA_KRT_REALM;
@@ -1255,7 +1459,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
if (a[RTA_METRICS])
{
u32 metrics[KRT_METRICS_MAX];
ea_list *ea = alloca(sizeof(ea_list) + KRT_METRICS_MAX * sizeof(eattr));
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)
@@ -1276,37 +1480,69 @@ nl_parse_route(struct nlmsghdr *h, int scan)
if (n > 0)
{
ea->next = ra.eattrs;
ea->next = ra->eattrs;
ea->flags = EALF_SORTED;
ea->count = n;
ra.eattrs = ea;
ra->eattrs = ea;
}
}
if (scan)
krt_got_route(p, e);
/*
* Ideally, now we would send the received route to the rest of kernel code.
* But IPv6 ECMP routes are sent as a sequence of routes, so we postpone it
* and merge next hops until the end of the sequence.
*/
if (!s->net)
{
/* Store the new route */
s->net = net;
s->attrs = ra;
s->proto = p;
s->new = new;
s->krt_src = src;
s->krt_type = i->rtm_type;
s->krt_proto = i->rtm_protocol;
s->krt_metric = priority;
}
else
krt_got_route_async(p, e, new);
{
/* Merge next hops with the stored route */
rta *a = s->attrs;
if (a->dest != RTD_MULTIPATH)
{
a->dest = RTD_MULTIPATH;
a->nexthops = nl_alloc_mpnh(s, a->gw, a->iface, 0);
}
mpnh_insert(&a->nexthops, nl_alloc_mpnh(s, ra->gw, ra->iface, 0));
}
}
void
krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NULL */
{
struct nlmsghdr *h;
struct nl_parse_state s;
nl_parse_begin(&s, 1, 0);
nl_request_dump(AF_INET, RTM_GETROUTE);
while (h = nl_get_scan())
if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
nl_parse_route(h, 1);
nl_parse_route(&s, h);
else
log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
nl_parse_end(&s);
nl_parse_begin(&s, 1, 1);
nl_request_dump(AF_INET6, RTM_GETROUTE);
while (h = nl_get_scan())
if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
nl_parse_route(h, 1);
nl_parse_route(&s, h);
else
log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
nl_parse_end(&s);
}
/*
@@ -1319,12 +1555,16 @@ static byte *nl_async_rx_buffer; /* Receive buffer */
static void
nl_async_msg(struct nlmsghdr *h)
{
struct nl_parse_state s;
switch (h->nlmsg_type)
{
case RTM_NEWROUTE:
case RTM_DELROUTE:
DBG("KRT: Received async route notification (%d)\n", h->nlmsg_type);
nl_parse_route(h, 0);
nl_parse_begin(&s, 0, 0);
nl_parse_route(&s, h);
nl_parse_end(&s);
break;
case RTM_NEWLINK:
case RTM_DELLINK:
@@ -1396,6 +1636,12 @@ nl_async_hook(sock *sk, int size UNUSED)
return 1;
}
static void
nl_async_err_hook(sock *sk, int e UNUSED)
{
nl_async_hook(sk, 0);
}
static void
nl_open_async(void)
{
@@ -1433,6 +1679,7 @@ nl_open_async(void)
sk = nl_async_sk = sk_new(krt_pool);
sk->type = SK_MAGIC;
sk->rx_hook = nl_async_hook;
sk->err_hook = nl_async_err_hook;
sk->fd = fd;
if (sk_open(sk) < 0)
bug("Netlink: sk_open failed");
@@ -1446,6 +1693,7 @@ nl_open_async(void)
void
krt_sys_io_init(void)
{
nl_linpool = lp_new(krt_pool, 4080);
HASH_INIT(nl_table_map, krt_pool, 6);
}
@@ -1478,19 +1726,21 @@ krt_sys_shutdown(struct krt_proto *p)
int
krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o)
{
return n->sys.table_id == o->sys.table_id;
return (n->sys.table_id == o->sys.table_id) && (n->sys.metric == o->sys.metric);
}
void
krt_sys_init_config(struct krt_config *cf)
{
cf->sys.table_id = RT_TABLE_MAIN;
cf->sys.metric = 0;
}
void
krt_sys_copy_config(struct krt_config *d, struct krt_config *s)
{
d->sys.table_id = s->sys.table_id;
d->sys.metric = s->sys.metric;
}
static const char *krt_metrics_names[KRT_METRICS_MAX] = {
@@ -1515,6 +1765,10 @@ krt_sys_get_attr(eattr *a, byte *buf, int buflen UNUSED)
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);

29
sysdep/unix/io.c
View File

@@ -1892,6 +1892,20 @@ int sk_is_ipv4(sock *s)
int sk_is_ipv6(sock *s)
{ return s->af == AF_INET6; }
void
sk_err(sock *s, int revents)
{
int se = 0, sse = sizeof(se);
if ((s->type != SK_MAGIC) && (revents & POLLERR))
if (getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &se, &sse) < 0)
{
log(L_ERR "IO: Socket error: SO_ERROR: %m");
se = 0;
}
s->err_hook(s, se);
}
void
sk_dump_all(void)
{
@@ -2202,7 +2216,7 @@ io_loop(void)
int steps;
steps = MAX_STEPS;
if (s->fast_rx && (pfd[s->index].revents & (POLLIN | POLLHUP | POLLERR)) && s->rx_hook)
if (s->fast_rx && (pfd[s->index].revents & POLLIN) && s->rx_hook)
do
{
steps--;
@@ -2224,6 +2238,7 @@ io_loop(void)
goto next;
}
while (e && steps);
current_sock = sk_next(s);
next: ;
}
@@ -2247,18 +2262,26 @@ io_loop(void)
goto next2;
}
if (!s->fast_rx && (pfd[s->index].revents & (POLLIN | POLLHUP | POLLERR)) && s->rx_hook)
if (!s->fast_rx && (pfd[s->index].revents & POLLIN) && s->rx_hook)
{
count++;
io_log_event(s->rx_hook, s->data);
sk_read(s, pfd[s->index].revents);
if (s != current_sock)
goto next2;
goto next2;
}
if (pfd[s->index].revents & (POLLHUP | POLLERR))
{
sk_err(s, pfd[s->index].revents);
goto next2;
}
current_sock = sk_next(s);
next2: ;
}
stored_sock = current_sock;
}
}

18
sysdep/unix/krt.Y
View File

@@ -29,6 +29,8 @@ CF_DECLS
CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, GRACEFUL, RESTART, KRT_SOURCE, KRT_METRIC, MERGE, PATHS)
%type <i> kern_mp_limit
CF_GRAMMAR
/* Kernel syncer protocol */
@@ -43,6 +45,11 @@ kern_proto_start: proto_start KERNEL {
CF_ADDTO(kern_proto, kern_proto_start proto_name '{')
CF_ADDTO(kern_proto, kern_proto kern_item ';')
kern_mp_limit:
/* empty */ { $$ = KRT_DEFAULT_ECMP_LIMIT; }
| LIMIT expr { $$ = $2; if (($2 <= 0) || ($2 > 255)) cf_error("Merge paths limit must be in range 1-255"); }
;
kern_item:
proto_item
| proto_channel { this_proto->net_type = $1->net_type; }
@@ -55,13 +62,18 @@ kern_item:
THIS_KRT->learn = $2;
#ifndef KRT_ALLOW_LEARN
if ($2)
cf_error("Learning of kernel routes not supported in this configuration");
cf_error("Learning of kernel routes not supported on this platform");
#endif
}
| DEVICE ROUTES bool { THIS_KRT->devroutes = $3; }
| GRACEFUL RESTART bool { THIS_KRT->graceful_restart = $3; }
| MERGE PATHS bool { krt_set_merge_paths(this_channel, $3, KRT_DEFAULT_ECMP_LIMIT); }
| MERGE PATHS bool LIMIT expr { krt_set_merge_paths(this_channel, $3, $5); }
| MERGE PATHS bool kern_mp_limit {
krt_set_merge_paths(this_channel, $3, $4);
#ifndef KRT_ALLOW_MERGE_PATHS
if ($3)
cf_error("Path merging not supported on this platform");
#endif
}
;
/* Kernel interface protocol */

2
sysdep/unix/krt.c
View File

@@ -604,7 +604,7 @@ krt_export_net(struct krt_proto *p, net *net, rte **rt_free, ea_list **tmpa)
rte *rt;
if (c->ra_mode == RA_MERGED)
return rt_export_merged(c, net, rt_free, tmpa, 1);
return rt_export_merged(c, net, rt_free, tmpa, krt_filter_lp, 1);
rt = net->routes;
*rt_free = NULL;

9
sysdep/unix/log.c
View File

@@ -20,6 +20,7 @@
#include <stdarg.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include "nest/bird.h"
#include "nest/cli.h"
@@ -209,6 +210,7 @@ bug(const char *msg, ...)
va_start(args, msg);
vlog(L_BUG[0], msg, args);
va_end(args);
abort();
}
@@ -226,6 +228,7 @@ die(const char *msg, ...)
va_start(args, msg);
vlog(L_FATAL[0], msg, args);
va_end(args);
exit(1);
}
@@ -312,7 +315,11 @@ log_init_debug(char *f)
else if (!*f)
dbgf = stderr;
else if (!(dbgf = fopen(f, "a")))
log(L_ERR "Error opening debug file `%s': %m", f);
{
/* Cannot use die() nor log() here, logging is not yet initialized */
fprintf(stderr, "bird: Unable to open debug file %s: %s\n", f, strerror(errno));
exit(1);
}
if (dbgf)
setvbuf(dbgf, NULL, _IONBF, 0);
}

60
sysdep/unix/main.c
View File

@@ -621,7 +621,7 @@ signal_init(void)
* Parsing of command-line arguments
*/
static char *opt_list = "c:dD:ps:P:u:g:flR";
static char *opt_list = "c:dD:ps:P:u:g:flRh";
static int parse_and_exit;
char *bird_name;
static char *use_user;
@@ -629,10 +629,43 @@ static char *use_group;
static int run_in_foreground = 0;
static void
usage(void)
display_usage(void)
{
fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-P <pid-file>] [-u <user>] [-g <group>] [-f] [-l] [-R]\n", bird_name);
exit(1);
fprintf(stderr, "Usage: %s [--version] [--help] [-c <config-file>] [OPTIONS]\n", bird_name);
}
static void
display_help(void)
{
display_usage();
fprintf(stderr,
"\n"
"Options: \n"
" -c <config-file> Use given configuration file instead\n"
" of prefix/etc/bird.conf\n"
" -d Enable debug messages and run bird in foreground\n"
" -D <debug-file> Log debug messages to given file instead of stderr\n"
" -f Run bird in foreground\n"
" -g <group> Use given group ID\n"
" -h, --help Display this information\n"
" -l Look for a configuration file and a communication socket\n"
" file in the current working directory\n"
" -p Test configuration file and exit without start\n"
" -P <pid-file> Create a PID file with given filename\n"
" -R Apply graceful restart recovery after start\n"
" -s <control-socket> Use given filename for a control socket\n"
" -u <user> Drop privileges and use given user ID\n"
" --version Display version of BIRD\n");
exit(0);
}
static void
display_version(void)
{
fprintf(stderr, "BIRD version " BIRD_VERSION "\n");
exit(0);
}
static inline char *
@@ -706,12 +739,9 @@ parse_args(int argc, char **argv)
if (argc == 2)
{
if (!strcmp(argv[1], "--version"))
{
fprintf(stderr, "BIRD version " BIRD_VERSION "\n");
exit(0);
}
display_version();
if (!strcmp(argv[1], "--help"))
usage();
display_help();
}
while ((c = getopt(argc, argv, opt_list)) >= 0)
switch (c)
@@ -755,11 +785,19 @@ parse_args(int argc, char **argv)
case 'R':
graceful_restart_recovery();
break;
case 'h':
display_help();
break;
default:
usage();
fputc('\n', stderr);
display_usage();
exit(1);
}
if (optind < argc)
usage();
{
display_usage();
exit(1);
}
}
/*