This uses struct filterstate in rde_update_dispatch() and passes the
struct to a few functions down (rde_update_update, path_update and some
more friends). After that it should become easier to move nexthop and
later maybe the peer out of struct rde_aspath into struct prefix.
--
:wq Claudio
Index: rde.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/rde.c,v
retrieving revision 1.390
diff -u -p -r1.390 rde.c
--- rde.c 10 Jul 2018 15:13:35 -0000 1.390
+++ rde.c 10 Jul 2018 16:25:52 -0000
@@ -51,16 +51,16 @@ void rde_sighdlr(int);
void rde_dispatch_imsg_session(struct imsgbuf *);
void rde_dispatch_imsg_parent(struct imsgbuf *);
int rde_update_dispatch(struct imsg *);
-int rde_update_update(struct rde_peer *, struct rde_aspath *,
+int rde_update_update(struct rde_peer *, struct filterstate *,
struct bgpd_addr *, u_int8_t);
void rde_update_withdraw(struct rde_peer *, struct bgpd_addr *,
u_int8_t);
int rde_attr_parse(u_char *, u_int16_t, struct rde_peer *,
- struct rde_aspath *, struct mpattr *);
+ struct filterstate *, struct mpattr *);
int rde_attr_add(struct rde_aspath *, u_char *, u_int16_t);
u_int8_t rde_attr_missing(struct rde_aspath *, int, u_int16_t);
int rde_get_mp_nexthop(u_char *, u_int16_t, u_int8_t,
- struct rde_aspath *);
+ struct filterstate *);
int rde_update_extract_prefix(u_char *, u_int16_t, void *,
u_int8_t, u_int8_t);
int rde_update_get_prefix(u_char *, u_int16_t, struct bgpd_addr *,
@@ -938,7 +938,7 @@ rde_dispatch_imsg_parent(struct imsgbuf
int
rde_update_dispatch(struct imsg *imsg)
{
- struct rde_aspath asp;
+ struct filterstate state;
struct bgpd_addr prefix;
struct mpattr mpa;
struct rde_peer *peer;
@@ -986,11 +986,11 @@ rde_update_dispatch(struct imsg *imsg)
imsg->hdr.len - IMSG_HEADER_SIZE - 4 - withdrawn_len - attrpath_len;
bzero(&mpa, sizeof(mpa));
- path_prep(&asp);
+ rde_filterstate_prep(&state, NULL);
if (attrpath_len != 0) { /* 0 = no NLRI information in this message */
/* parse path attributes */
while (len > 0) {
- if ((pos = rde_attr_parse(p, len, peer, &asp,
+ if ((pos = rde_attr_parse(p, len, peer, &state,
&mpa)) < 0)
goto done;
p += pos;
@@ -998,19 +998,19 @@ rde_update_dispatch(struct imsg *imsg)
}
/* check for missing but necessary attributes */
- if ((subtype = rde_attr_missing(&asp, peer->conf.ebgp,
+ if ((subtype = rde_attr_missing(&state.aspath, peer->conf.ebgp,
nlri_len))) {
rde_update_err(peer, ERR_UPDATE, ERR_UPD_MISSNG_WK_ATTR,
&subtype, sizeof(u_int8_t));
goto done;
}
- rde_as4byte_fixup(peer, &asp);
+ rde_as4byte_fixup(peer, &state.aspath);
/* enforce remote AS if requested */
- if (asp.flags & F_ATTR_ASPATH &&
+ if (state.aspath.flags & F_ATTR_ASPATH &&
peer->conf.enforce_as == ENFORCE_AS_ON) {
- fas = aspath_neighbor(asp.aspath);
+ fas = aspath_neighbor(state.aspath.aspath);
if (peer->conf.remote_as != fas) {
log_peer_warnx(&peer->conf, "bad path, "
"starting with %s, "
@@ -1021,7 +1021,7 @@ rde_update_dispatch(struct imsg *imsg)
}
}
- rde_reflector(peer, &asp);
+ rde_reflector(peer, &state.aspath);
}
p = imsg->data;
@@ -1096,7 +1096,8 @@ rde_update_dispatch(struct imsg *imsg)
goto done;
}
- if ((asp.flags & ~F_ATTR_MP_UNREACH) == 0 && mplen == 0) {
+ if ((state.aspath.flags & ~F_ATTR_MP_UNREACH) == 0 &&
+ mplen == 0) {
/* EoR marker */
peer_recv_eor(peer, aid);
}
@@ -1141,7 +1142,7 @@ rde_update_dispatch(struct imsg *imsg)
break;
}
- if ((asp.flags & ~F_ATTR_MP_UNREACH) == 0) {
+ if ((state.aspath.flags & ~F_ATTR_MP_UNREACH) == 0) {
error = 0;
goto done;
}
@@ -1153,8 +1154,8 @@ rde_update_dispatch(struct imsg *imsg)
/* aspath needs to be loop free nota bene this is not a hard error */
if (peer->conf.ebgp &&
peer->conf.enforce_local_as == ENFORCE_AS_ON &&
- !aspath_loopfree(asp.aspath, peer->conf.local_as))
- asp.flags |= F_ATTR_LOOP;
+ !aspath_loopfree(state.aspath.aspath, peer->conf.local_as))
+ state.aspath.flags |= F_ATTR_LOOP;
/* parse nlri prefix */
while (nlri_len > 0) {
@@ -1176,7 +1177,7 @@ rde_update_dispatch(struct imsg *imsg)
goto done;
}
- if (rde_update_update(peer, &asp, &prefix, prefixlen) == -1)
+ if (rde_update_update(peer, &state, &prefix, prefixlen) == -1)
goto done;
}
@@ -1212,11 +1213,11 @@ rde_update_dispatch(struct imsg *imsg)
* this works because asp is not linked.
* But first unlock the previously locked nexthop.
*/
- if (asp.nexthop) {
- (void)nexthop_put(asp.nexthop);
- asp.nexthop = NULL;
+ if (state.aspath.nexthop) {
+ (void)nexthop_put(state.aspath.nexthop);
+ state.aspath.nexthop = NULL;
}
- if ((pos = rde_get_mp_nexthop(mpp, mplen, aid, &asp)) == -1) {
+ if ((pos = rde_get_mp_nexthop(mpp, mplen, aid, &state)) == -1) {
log_peer_warnx(&peer->conf, "bad nlri prefix");
rde_update_err(peer, ERR_UPDATE, ERR_UPD_OPTATTR,
mpa.reach, mpa.reach_len);
@@ -1240,7 +1241,7 @@ rde_update_dispatch(struct imsg *imsg)
mpp += pos;
mplen -= pos;
- if (rde_update_update(peer, &asp, &prefix,
+ if (rde_update_update(peer, &state, &prefix,
prefixlen) == -1)
goto done;
}
@@ -1259,7 +1260,7 @@ rde_update_dispatch(struct imsg *imsg)
mpp += pos;
mplen -= pos;
- if (rde_update_update(peer, &asp, &prefix,
+ if (rde_update_update(peer, &state, &prefix,
prefixlen) == -1)
goto done;
}
@@ -1271,13 +1272,13 @@ rde_update_dispatch(struct imsg *imsg)
}
done:
- path_clean(&asp);
+ rde_filterstate_clean(&state);
return (error);
}
int
-rde_update_update(struct rde_peer *peer, struct rde_aspath *asp,
+rde_update_update(struct rde_peer *peer, struct filterstate *in,
struct bgpd_addr *prefix, u_int8_t prefixlen)
{
struct filterstate state;
@@ -1287,7 +1288,7 @@ rde_update_update(struct rde_peer *peer,
peer->prefix_rcvd_update++;
/* add original path to the Adj-RIB-In */
- if (path_update(&ribs[RIB_ADJ_IN].rib, peer, asp, prefix, prefixlen, 0))
+ if (path_update(&ribs[RIB_ADJ_IN].rib, peer, in, prefix, prefixlen, 0))
peer->prefix_cnt++;
/* max prefix checker */
@@ -1305,7 +1306,7 @@ rde_update_update(struct rde_peer *peer,
for (i = RIB_LOC_START; i < rib_size; i++) {
if (*ribs[i].name == '\0')
break;
- rde_filterstate_prep(&state, asp);
+ rde_filterstate_prep(&state, &in->aspath);
/* input filter */
action = rde_filter(ribs[i].in_rules, peer, p, &state);
@@ -1313,7 +1314,7 @@ rde_update_update(struct rde_peer *peer,
rde_update_log("update", i, peer,
&state.aspath.nexthop->exit_nexthop, prefix,
prefixlen);
- path_update(&ribs[i].rib, peer, &state.aspath, prefix,
+ path_update(&ribs[i].rib, peer, &state, prefix,
prefixlen, 0);
} else if (prefix_remove(&ribs[i].rib, peer, prefix, prefixlen,
0)) {
@@ -1366,9 +1367,10 @@ rde_update_withdraw(struct rde_peer *pee
int
rde_attr_parse(u_char *p, u_int16_t len, struct rde_peer *peer,
- struct rde_aspath *a, struct mpattr *mpa)
+ struct filterstate *state, struct mpattr *mpa)
{
struct bgpd_addr nexthop;
+ struct rde_aspath *a = &state->aspath;
u_char *op = p, *npath;
u_int32_t tmp32;
int error;
@@ -1755,7 +1757,7 @@ rde_attr_missing(struct rde_aspath *a, i
int
rde_get_mp_nexthop(u_char *data, u_int16_t len, u_int8_t aid,
- struct rde_aspath *asp)
+ struct filterstate *state)
{
struct bgpd_addr nexthop;
u_int8_t totlen, nhlen;
@@ -1815,7 +1817,7 @@ rde_get_mp_nexthop(u_char *data, u_int16
return (-1);
}
- asp->nexthop = nexthop_get(&nexthop);
+ state->aspath.nexthop = nexthop_get(&nexthop);
/* ignore reserved (old SNPA) field as per RFC4760 */
totlen += nhlen + 1;
@@ -2994,7 +2996,7 @@ rde_softreconfig_in(struct rib_entry *re
if (action == ACTION_ALLOW) {
/* update Local-RIB */
- path_update(&rib->rib, peer, &state.aspath, &addr,
+ path_update(&rib->rib, peer, &state, &addr,
pt->prefixlen, 0);
} else if (action == ACTION_DENY) {
/* remove from Local-RIB */
@@ -3550,7 +3552,7 @@ network_add(struct network_config *nc, i
for (i = RIB_LOC_START; i < rib_size; i++) {
if (*ribs[i].name == '\0')
break;
- path_update(&ribs[i].rib, peerself, asp, &nc->prefix,
+ path_update(&ribs[i].rib, peerself, &state, &nc->prefix,
nc->prefixlen, 0);
}
rde_filterstate_clean(&state);
Index: rde.h
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/rde.h,v
retrieving revision 1.176
diff -u -p -r1.176 rde.h
--- rde.h 9 Jul 2018 14:08:48 -0000 1.176
+++ rde.h 10 Jul 2018 16:23:24 -0000
@@ -473,7 +473,7 @@ void path_init(u_int32_t);
void path_init(u_int32_t);
void path_shutdown(void);
int path_update(struct rib *, struct rde_peer *,
- struct rde_aspath *, struct bgpd_addr *, int, int);
+ struct filterstate *, struct bgpd_addr *, int, int);
int path_compare(struct rde_aspath *, struct rde_aspath *);
void path_remove(struct rde_aspath *);
u_int32_t path_remove_stale(struct rde_aspath *, u_int8_t);
Index: rde_filter.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/rde_filter.c,v
retrieving revision 1.95
diff -u -p -r1.95 rde_filter.c
--- rde_filter.c 9 Jul 2018 14:08:48 -0000 1.95
+++ rde_filter.c 10 Jul 2018 16:07:16 -0000
@@ -639,7 +639,9 @@ rde_filterstate_prep(struct filterstate
{
memset(state, 0, sizeof(*state));
- path_copy(path_prep(&state->aspath), asp);
+ path_prep(&state->aspath);
+ if (asp)
+ path_copy(&state->aspath, asp);
}
void
Index: rde_rib.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/rde_rib.c,v
retrieving revision 1.168
diff -u -p -r1.168 rde_rib.c
--- rde_rib.c 10 Jul 2018 07:58:13 -0000 1.168
+++ rde_rib.c 10 Jul 2018 16:26:15 -0000
@@ -390,10 +390,10 @@ path_shutdown(void)
}
int
-path_update(struct rib *rib, struct rde_peer *peer, struct rde_aspath *nasp,
+path_update(struct rib *rib, struct rde_peer *peer, struct filterstate *state,
struct bgpd_addr *prefix, int prefixlen, int flag)
{
- struct rde_aspath *asp;
+ struct rde_aspath *asp, *nasp = &state->aspath;
struct prefix *p;
int pflag = 0;
