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Adds krt_source route attribute.

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Thanks Jeremie Dimino for the original patch.
This commit is contained in:
Ondrej Zajicek 2012-03-23 00:26:26 +01:00
parent 89647357af
commit 72aed1a00b
6 changed files with 44 additions and 6 deletions
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6
doc/bird.sgml
View File

@ -1653,6 +1653,12 @@ are translated to appropriate system (and OS-specific) route attributes.
We support these attributes:
<descrip>
<tag>int <cf/krt_source/</tag> The source of the imported
kernel route. The value is system-dependent. On Linux, it is
a value of the protocol field of the route. See
/etc/iproute2/rt_protos for common values. On BSD, it is
based on STATIC and PROTOx flags. The attribute is read-only.
<tag>ip <cf/krt_prefsrc/</tag> (Linux) The preferred source address.
Used in source address selection for outgoing packets. Have to
be one of IP addresses of the router.

10
sysdep/bsd/krt-sock.c
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@ -255,10 +255,11 @@ krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
ip_addr idst, igate, imask;
void *body = (char *)msg->buf;
int new = (msg->rtm.rtm_type == RTM_ADD);
int src;
char *errmsg = "KRT: Invalid route received";
int flags = msg->rtm.rtm_flags;
int addrs = msg->rtm.rtm_addrs;
int src;
byte src2;
if (!(flags & RTF_UP) && scan)
SKIP("not up in scan\n");
@ -302,12 +303,17 @@ krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
u32 self_mask = RTF_PROTO1;
u32 alien_mask = RTF_STATIC | RTF_PROTO1 | RTF_GATEWAY;
src2 = (flags & RTF_STATIC) ? 1 : 0;
src2 |= (flags & RTF_PROTO1) ? 2 : 0;
#ifdef RTF_PROTO2
alien_mask |= RTF_PROTO2;
src2 |= (flags & RTF_PROTO2) ? 4 : 0;
#endif
#ifdef RTF_PROTO3
alien_mask |= RTF_PROTO3;
src2 |= (flags & RTF_PROTO3) ? 8 : 0;
#endif
#ifdef RTF_REJECT
@ -397,9 +403,9 @@ krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
e = rte_get_temp(&a);
e->net = net;
e->u.krt.src = src;
e->u.krt.proto = src2;
/* These are probably too Linux-specific */
e->u.krt.proto = 0;
e->u.krt.type = 0;
e->u.krt.metric = 0;

4
sysdep/unix/krt.Y
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@ -17,7 +17,7 @@ CF_DEFINES
CF_DECLS
CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES)
CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, KRT_SOURCE)
CF_GRAMMAR
@ -90,6 +90,8 @@ kif_item:
}
;
CF_ADDTO(dynamic_attr, KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_SOURCE); })
CF_CODE
CF_END

23
sysdep/unix/krt.c
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@ -907,12 +907,29 @@ krt_shutdown(struct proto *P)
return PS_DOWN;
}
struct ea_list *
krt_make_tmp_attrs(struct rte *rt, struct linpool *pool)
{
struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 1 * sizeof(eattr));
l->next = NULL;
l->flags = EALF_SORTED;
l->count = 1;
l->attrs[0].id = EA_KRT_SOURCE;
l->attrs[0].flags = 0;
l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;
l->attrs[0].u.data = rt->u.krt.proto;
return l;
}
static struct proto *
krt_init(struct proto_config *c)
{
struct krt_proto *p = proto_new(c, sizeof(struct krt_proto));
p->p.accept_ra_types = RA_OPTIMAL;
p->p.make_tmp_attrs = krt_make_tmp_attrs;
p->p.import_control = krt_import_control;
p->p.rt_notify = krt_notify;
@ -952,12 +969,18 @@ krt_get_attr(eattr * a, byte * buf, int buflen UNUSED)
{
switch (a->id)
{
case EA_KRT_SOURCE:
bsprintf(buf, "source");
return GA_NAME;
case EA_KRT_PREFSRC:
bsprintf(buf, "prefsrc");
return GA_NAME;
case EA_KRT_REALM:
bsprintf(buf, "realm");
return GA_NAME;
default:
return GA_UNKNOWN;
}

5
sysdep/unix/krt.h
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@ -28,8 +28,9 @@ struct kif_proto;
#define KRF_DELETE 3 /* Should be deleted */
#define KRF_IGNORE 4 /* To be ignored */
#define EA_KRT_PREFSRC EA_CODE(EAP_KRT, 0)
#define EA_KRT_REALM EA_CODE(EAP_KRT, 1)
#define EA_KRT_SOURCE EA_CODE(EAP_KRT, 0)
#define EA_KRT_PREFSRC EA_CODE(EAP_KRT, 1)
#define EA_KRT_REALM EA_CODE(EAP_KRT, 2)
/* Whenever we recognize our own routes, we allow learing of foreign routes */

2
sysdep/unix/main.c
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@ -191,7 +191,7 @@ sysdep_preconfig(struct config *c)
init_list(&c->logfiles);
#ifdef PATH_IPROUTE_DIR
// read_iproute_table(PATH_IPROUTE_DIR "/rt_protos", "ipp_", 256);
read_iproute_table(PATH_IPROUTE_DIR "/rt_protos", "ipp_", 256);
read_iproute_table(PATH_IPROUTE_DIR "/rt_realms", "ipr_", 256);
read_iproute_table(PATH_IPROUTE_DIR "/rt_scopes", "ips_", 256);
read_iproute_table(PATH_IPROUTE_DIR "/rt_tables", "ipt_", 256);