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Diffstat (limited to 'sysdep/linux/netlink.c')
-rw-r--r--sysdep/linux/netlink.c71
1 files changed, 46 insertions, 25 deletions
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index ca5c79a4..afb9dc8b 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -30,14 +30,12 @@
#include <asm/types.h>
#include <linux/if.h>
-#ifdef HAVE_LWTUNNEL
-#include <linux/lwtunnel.h>
-#else
-#include "sysdep/linux/lwtunnel.h"
-#endif
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
+#ifdef HAVE_MPLS_KERNEL
+#include <linux/lwtunnel.h>
+#endif
#ifndef MSG_TRUNC /* Hack: Several versions of glibc miss this one :( */
#define MSG_TRUNC 0x20
@@ -59,13 +57,6 @@
#define RTA_VIA 18
#endif
-#ifndef HAVE_STRUCT_RTVIA
-struct rtvia {
- unsigned short rtvia_family;
- u8 rtvia_addr[0];
-};
-#endif
-
#ifndef RTA_NEWDST
#define RTA_NEWDST 19
#endif
@@ -361,9 +352,11 @@ static struct nl_want_attrs nexthop_attr_want6[BIRD_RTA_MAX] = {
[RTA_ENCAP] = { 1, 0, 0 },
};
+#ifdef HAVE_MPLS_KERNEL
static struct nl_want_attrs encap_mpls_want[BIRD_RTA_MAX] = {
[RTA_DST] = { 1, 0, 0 },
};
+#endif
static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = {
[RTA_DST] = { 1, 1, sizeof(ip4_addr) },
@@ -394,6 +387,7 @@ static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = {
[RTA_ENCAP] = { 1, 0, 0 },
};
+#ifdef HAVE_MPLS_KERNEL
static struct nl_want_attrs rtm_attr_want_mpls[BIRD_RTA_MAX] = {
[RTA_DST] = { 1, 1, sizeof(u32) },
[RTA_IIF] = { 1, 1, sizeof(u32) },
@@ -405,6 +399,7 @@ static struct nl_want_attrs rtm_attr_want_mpls[BIRD_RTA_MAX] = {
[RTA_VIA] = { 1, 0, 0 },
[RTA_NEWDST] = { 1, 0, 0 },
};
+#endif
static int
@@ -456,6 +451,7 @@ static inline ip_addr rta_get_ipa(struct rtattr *a)
return ipa_from_ip6(rta_get_ip6(a));
}
+#ifdef HAVE_MPLS_KERNEL
static inline ip_addr rta_get_via(struct rtattr *a)
{
struct rtvia *v = RTA_DATA(a);
@@ -474,6 +470,7 @@ static inline int rta_get_mpls(struct rtattr *a, u32 *stack)
return mpls_get(RTA_DATA(a), RTA_PAYLOAD(a) & ~0x3, stack);
}
+#endif
struct rtattr *
nl_add_attr(struct nlmsghdr *h, uint bufsize, uint code, const void *data, uint dlen)
@@ -542,6 +539,7 @@ nl_add_attr_ipa(struct nlmsghdr *h, uint bufsize, int code, ip_addr ipa)
nl_add_attr_ip6(h, bufsize, code, ipa_to_ip6(ipa));
}
+#ifdef HAVE_MPLS_KERNEL
static inline void
nl_add_attr_mpls(struct nlmsghdr *h, uint bufsize, int code, int len, u32 *stack)
{
@@ -583,6 +581,7 @@ nl_add_attr_via(struct nlmsghdr *h, uint bufsize, ip_addr ipa)
nl_close_attr(h, nest);
}
+#endif
static inline struct rtnexthop *
nl_open_nexthop(struct nlmsghdr *h, uint bufsize)
@@ -605,8 +604,9 @@ nl_close_nexthop(struct nlmsghdr *h, struct rtnexthop *nh)
}
static inline void
-nl_add_nexthop(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af)
+nl_add_nexthop(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af UNUSED)
{
+#ifdef HAVE_MPLS_KERNEL
if (nh->labels > 0)
if (af == AF_MPLS)
nl_add_attr_mpls(h, bufsize, RTA_NEWDST, nh->labels, nh->label);
@@ -618,6 +618,11 @@ nl_add_nexthop(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af)
nl_add_attr_via(h, bufsize, nh->gw);
else
nl_add_attr_ipa(h, bufsize, RTA_GATEWAY, nh->gw);
+#else
+
+ if (ipa_nonzero(nh->gw))
+ nl_add_attr_ipa(h, bufsize, RTA_GATEWAY, nh->gw);
+#endif
}
static void
@@ -716,20 +721,22 @@ nl_parse_multipath(struct krt_proto *p, struct rtattr *ra, int af)
else
rv->gw = IPA_NONE;
+#ifdef HAVE_MPLS_KERNEL
if (a[RTA_ENCAP_TYPE])
- {
- if (rta_get_u16(a[RTA_ENCAP_TYPE]) != LWTUNNEL_ENCAP_MPLS) {
- log(L_WARN "KRT: Unknown encapsulation method %d in multipath", rta_get_u16(a[RTA_ENCAP_TYPE]));
- return NULL;
- }
-
- 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));
- rv->labels = rta_get_mpls(enca[RTA_DST], rv->label);
- break;
+ {
+ if (rta_get_u16(a[RTA_ENCAP_TYPE]) != LWTUNNEL_ENCAP_MPLS) {
+ log(L_WARN "KRT: Unknown encapsulation method %d in multipath", rta_get_u16(a[RTA_ENCAP_TYPE]));
+ return NULL;
}
+ 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));
+ rv->labels = rta_get_mpls(enca[RTA_DST], rv->label);
+ break;
+ }
+#endif
+
len -= NLMSG_ALIGN(nh->rtnh_len);
nh = RTNH_NEXT(nh);
@@ -1216,12 +1223,14 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
r->r.rtm_dst_len = net_pxlen(net->n.addr);
r->r.rtm_protocol = RTPROT_BIRD;
r->r.rtm_scope = RT_SCOPE_NOWHERE;
+#ifdef HAVE_MPLS_KERNEL
if (p->af == AF_MPLS)
{
u32 label = net_mpls(net->n.addr);
nl_add_attr_mpls(&r->h, rsize, RTA_DST, 1, &label);
}
else
+#endif
nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(net->n.addr));
/*
@@ -1490,6 +1499,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
net_fill_ip6(&dst, IP6_NONE, 0);
break;
+#ifdef HAVE_MPLS_KERNEL
case AF_MPLS:
if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want_mpls, a, sizeof(a)))
return;
@@ -1502,6 +1512,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
net_fill_mpls(&dst, rta_mpls_stack[0]);
break;
+#endif
default:
return;
@@ -1595,11 +1606,17 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
return;
}
- if ((i->rtm_family != AF_MPLS) && a[RTA_GATEWAY] || (i->rtm_family == AF_MPLS) && a[RTA_VIA])
+ if ((i->rtm_family != AF_MPLS) && a[RTA_GATEWAY]
+#ifdef HAVE_MPLS_KERNEL
+ || (i->rtm_family == AF_MPLS) && a[RTA_VIA]
+#endif
+ )
{
+#ifdef HAVE_MPLS_KERNEL
if (i->rtm_family == AF_MPLS)
ra->nh.gw = rta_get_via(a[RTA_VIA]);
else
+#endif
ra->nh.gw = rta_get_ipa(a[RTA_GATEWAY]);
/* Silently skip strange 6to4 routes */
@@ -1637,6 +1654,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
return;
}
+#ifdef HAVE_MPLS_KERNEL
int labels = 0;
if ((i->rtm_family == AF_MPLS) && a[RTA_NEWDST] && !ra->nh.next)
labels = rta_get_mpls(a[RTA_NEWDST], ra->nh.label);
@@ -1666,6 +1684,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
}
else
ra->nh.labels = labels;
+#endif
rte *e = rte_get_temp(ra);
e->net = net;
@@ -1816,6 +1835,7 @@ krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NUL
log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
nl_parse_end(&s);
+#ifdef HAVE_MPLS_KERNEL
nl_parse_begin(&s, 1, 1);
nl_request_dump(AF_MPLS, RTM_GETROUTE);
while (h = nl_get_scan())
@@ -1824,6 +1844,7 @@ krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NUL
else
log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
nl_parse_end(&s);
+#endif
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 21:53:32 +0000