diff options
Diffstat (limited to 'zebra')
| -rw-r--r-- | zebra/rib.h | 1 | ||||
| -rw-r--r-- | zebra/zebra_rib.c | 36 | ||||
| -rw-r--r-- | zebra/zserv.c | 59 |
3 files changed, 95 insertions, 1 deletions
diff --git a/zebra/rib.h b/zebra/rib.h index 887ed3c2..20a206ea 100644 --- a/zebra/rib.h +++ b/zebra/rib.h @@ -266,6 +266,7 @@ extern void rib_weed_tables (void); extern void rib_sweep_route (void); extern void rib_close (void); extern void rib_init (void); +extern unsigned long rib_score_proto (u_char proto); extern int static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c index 8228350f..72633895 100644 --- a/zebra/zebra_rib.c +++ b/zebra/zebra_rib.c @@ -2881,7 +2881,41 @@ rib_sweep_route (void) rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); } - + +/* Remove specific by protocol routes from 'table'. */ +static unsigned long +rib_score_proto_table (u_char proto, struct route_table *table) +{ + struct route_node *rn; + struct rib *rib; + struct rib *next; + unsigned long n = 0; + + if (table) + for (rn = route_top (table); rn; rn = route_next (rn)) + for (rib = rn->info; rib; rib = next) + { + next = rib->next; + if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) + continue; + if (rib->type == proto) + { + rib_delnode (rn, rib); + n++; + } + } + + return n; +} + +/* Remove specific by protocol routes. */ +unsigned long +rib_score_proto (u_char proto) +{ + return rib_score_proto_table (proto, vrf_table (AFI_IP, SAFI_UNICAST, 0)) + +rib_score_proto_table (proto, vrf_table (AFI_IP6, SAFI_UNICAST, 0)); +} + /* Close RIB and clean up kernel routes. */ static void rib_close_table (struct route_table *table) diff --git a/zebra/zserv.c b/zebra/zserv.c index d558b2d2..ec8cbf2b 100644 --- a/zebra/zserv.c +++ b/zebra/zserv.c @@ -64,6 +64,15 @@ zserv_delayed_close(struct thread *thread) return 0; } +/* When client connects, it sends hello message + * with promise to send zebra routes of specific type. + * Zebra stores a socket fd of the client into + * this array. And use it to clean up routes that + * client didn't remove for some reasons after closing + * connection. + */ +static int route_type_oaths[ZEBRA_ROUTE_MAX]; + static int zserv_flush_data(struct thread *thread) { @@ -1071,6 +1080,49 @@ zread_router_id_delete (struct zserv *client, u_short length) return 0; } +/* Tie up route-type and client->sock */ +static void +zread_hello (struct zserv *client) +{ + /* type of protocol (lib/zebra.h) */ + u_char proto; + proto = stream_getc (client->ibuf); + + /* accept only dynamic routing protocols */ + if ((proto < ZEBRA_ROUTE_MAX) + && (proto > ZEBRA_ROUTE_STATIC)) + { + zlog_notice ("client %d says hello and bids fair to announce only %s routes", + client->sock, zebra_route_string(proto)); + + /* if route-type was binded by other client */ + if (route_type_oaths[proto]) + zlog_warn ("sender of %s routes changed %c->%c", + zebra_route_string(proto), route_type_oaths[proto], + client->sock); + + route_type_oaths[proto] = client->sock; + } +} + +/* If client sent routes of specific type, zebra removes it + * and returns number of deleted routes. + */ +static void +zebra_score_rib (int client_sock) +{ + int i; + + for (i = ZEBRA_ROUTE_RIP; i < ZEBRA_ROUTE_MAX; i++) + if (client_sock == route_type_oaths[i]) + { + zlog_notice ("client %d disconnected. %lu %s routes removed from the rib", + client_sock, rib_score_proto (i), zebra_route_string (i)); + route_type_oaths[i] = 0; + break; + } +} + /* Close zebra client. */ static void zebra_client_close (struct zserv *client) @@ -1079,6 +1131,7 @@ zebra_client_close (struct zserv *client) if (client->sock) { close (client->sock); + zebra_score_rib (client->sock); client->sock = -1; } @@ -1283,6 +1336,9 @@ zebra_client_read (struct thread *thread) case ZEBRA_IPV4_IMPORT_LOOKUP: zread_ipv4_import_lookup (client, length); break; + case ZEBRA_HELLO: + zread_hello (client); + break; default: zlog_info ("Zebra received unknown command %d", command); break; @@ -1352,6 +1408,7 @@ zebra_serv () return; } + memset (&route_type_oaths, 0, sizeof (route_type_oaths)); memset (&addr, 0, sizeof (struct sockaddr_in)); addr.sin_family = AF_INET; addr.sin_port = htons (ZEBRA_PORT); @@ -1422,6 +1479,8 @@ zebra_serv_un (const char *path) return; } + memset (&route_type_oaths, 0, sizeof (route_type_oaths)); + /* Make server socket. */ memset (&serv, 0, sizeof (struct sockaddr_un)); serv.sun_family = AF_UNIX; |