From 595db7f16506d2c82a3478e9f8dab00c8733d386 Mon Sep 17 00:00:00 2001 From: paul Date: Sun, 25 May 2003 21:35:06 +0000 Subject: Add back support for null0 interface blackhole routes. --- zebra/rib.h | 3 ++ zebra/rt_netlink.c | 36 +++++++++++++----------- zebra/rt_socket.c | 9 +++++- zebra/zebra_rib.c | 31 +++++++++++++++++++++ zebra/zebra_vty.c | 82 +++++++++++++++++++++++++++++++++++++----------------- zebra/zserv.c | 3 ++ 6 files changed, 122 insertions(+), 42 deletions(-) (limited to 'zebra') diff --git a/zebra/rib.h b/zebra/rib.h index d416c152..5b0dcfe9 100644 --- a/zebra/rib.h +++ b/zebra/rib.h @@ -76,6 +76,7 @@ struct static_ipv4 u_char type; #define STATIC_IPV4_GATEWAY 1 #define STATIC_IPV4_IFNAME 2 +#define STATIC_IPV4_BLACKHOLE 3 /* Nexthop value. */ union @@ -137,6 +138,7 @@ struct nexthop #define NEXTHOP_TYPE_IPV6 6 /* IPv6 nexthop. */ #define NEXTHOP_TYPE_IPV6_IFINDEX 7 /* IPv6 nexthop with ifindex. */ #define NEXTHOP_TYPE_IPV6_IFNAME 8 /* IPv6 nexthop with ifname. */ +#define NEXTHOP_TYPE_BLACKHOLE 9 /* Null0 nexthop. */ u_char flags; #define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */ @@ -194,6 +196,7 @@ struct vrf struct nexthop *nexthop_ifindex_add (struct rib *, unsigned int); struct nexthop *nexthop_ifname_add (struct rib *, char *); +struct nexthop *nexthop_blackhole_add (struct rib *); struct nexthop *nexthop_ipv4_add (struct rib *, struct in_addr *); #ifdef HAVE_IPV6 struct nexthop *nexthop_ipv6_add (struct rib *, struct in6_addr *); diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c index 60043c9b..87062dc5 100644 --- a/zebra/rt_netlink.c +++ b/zebra/rt_netlink.c @@ -1174,14 +1174,16 @@ netlink_route (int cmd, int family, void *dest, int length, void *gate, req.r.rtm_protocol = RTPROT_ZEBRA; req.r.rtm_scope = RT_SCOPE_UNIVERSE; - if (discard) { - if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) - req.r.rtm_type = RTN_BLACKHOLE; - else if (zebra_flags & ZEBRA_FLAG_REJECT) - req.r.rtm_type = RTN_UNREACHABLE; - else assert(RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ - } else - req.r.rtm_type = RTN_UNICAST; + if (discard) + { + if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) + req.r.rtm_type = RTN_BLACKHOLE; + else if (zebra_flags & ZEBRA_FLAG_REJECT) + req.r.rtm_type = RTN_UNREACHABLE; + else assert(RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ + } + else + req.r.rtm_type = RTN_UNICAST; } if (dest) @@ -1252,14 +1254,16 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib, req.r.rtm_protocol = RTPROT_ZEBRA; req.r.rtm_scope = RT_SCOPE_UNIVERSE; - if (discard) { - if (rib->flags & ZEBRA_FLAG_BLACKHOLE) - req.r.rtm_type = RTN_BLACKHOLE; - else if (rib->flags & ZEBRA_FLAG_REJECT) - req.r.rtm_type = RTN_UNREACHABLE; - else assert(RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ - } else - req.r.rtm_type = RTN_UNICAST; + if (discard) + { + if (rib->flags & ZEBRA_FLAG_BLACKHOLE) + req.r.rtm_type = RTN_BLACKHOLE; + else if (rib->flags & ZEBRA_FLAG_REJECT) + req.r.rtm_type = RTN_UNREACHABLE; + else assert(RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ + } + else + req.r.rtm_type = RTN_UNICAST; } addattr_l (&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); diff --git a/zebra/rt_socket.c b/zebra/rt_socket.c index cd2f26ca..19b2fc2f 100644 --- a/zebra/rt_socket.c +++ b/zebra/rt_socket.c @@ -129,7 +129,14 @@ kernel_rtm_ipv4 (int cmd, struct prefix *p, struct rib *rib, int family) || nexthop->type == NEXTHOP_TYPE_IFNAME || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) ifindex = nexthop->ifindex; - } + if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) + { + struct in_addr loopback; + loopback.s_addr = htonl (INADDR_LOOPBACK); + sin_gate.sin_addr = loopback; + gate = 1; + } + } if (cmd == RTM_ADD) SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c index d7f8bdab..fe29e816 100644 --- a/zebra/zebra_rib.c +++ b/zebra/zebra_rib.c @@ -305,6 +305,21 @@ nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, } #endif /* HAVE_IPV6 */ +struct nexthop * +nexthop_blackhole_add (struct rib *rib) +{ + struct nexthop *nexthop; + + nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); + memset (nexthop, 0, sizeof (struct nexthop)); + nexthop->type = NEXTHOP_TYPE_BLACKHOLE; + SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); + + nexthop_add (rib, nexthop); + + return nexthop; +} + /* If force flag is not set, do not modify falgs at all for uninstall the route from FIB. */ int @@ -723,6 +738,9 @@ nexthop_active_check (struct route_node *rn, struct rib *rib, } break; #endif /* HAVE_IPV6 */ + case NEXTHOP_TYPE_BLACKHOLE: + SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); + break; default: break; } @@ -1270,6 +1288,9 @@ static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) case STATIC_IPV4_IFNAME: nexthop_ifname_add (rib, si->gate.ifname); break; + case STATIC_IPV4_BLACKHOLE: + nexthop_blackhole_add (rib); + break; } rib_process (rn, NULL); } @@ -1292,6 +1313,9 @@ static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) case STATIC_IPV4_IFNAME: nexthop_ifname_add (rib, si->gate.ifname); break; + case STATIC_IPV4_BLACKHOLE: + nexthop_blackhole_add (rib); + break; } /* Save the flags of this static routes (reject, blackhole) */ @@ -1316,6 +1340,9 @@ static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) && si->type == STATIC_IPV4_IFNAME && strcmp (nexthop->ifname, si->gate.ifname) == 0) return 1; + if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE + && si->type == STATIC_IPV4_BLACKHOLE) + return 1; return 0;; } @@ -1406,6 +1433,8 @@ static_add_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, type = STATIC_IPV4_GATEWAY; if (ifname) type = STATIC_IPV4_IFNAME; + else + type = STATIC_IPV4_BLACKHOLE; /* Do nothing if there is a same static route. */ for (si = rn->info; si; si = si->next) @@ -1499,6 +1528,8 @@ static_delete_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, type = STATIC_IPV4_GATEWAY; else if (ifname) type = STATIC_IPV4_IFNAME; + else + type = STATIC_IPV4_BLACKHOLE; /* Find same static route is the tree */ for (si = rn->info; si; si = si->next) diff --git a/zebra/zebra_vty.c b/zebra/zebra_vty.c index f7037f68..c8168c90 100644 --- a/zebra/zebra_vty.c +++ b/zebra/zebra_vty.c @@ -111,16 +111,37 @@ zebra_static_ipv4 (struct vty *vty, int add_cmd, { ret = inet_aton (mask_str, &mask); if (ret == 0) - { - vty_out (vty, "%% Malformed address%s", VTY_NEWLINE); - return CMD_WARNING; - } + { + vty_out (vty, "%% Malformed address%s", VTY_NEWLINE); + return CMD_WARNING; + } p.prefixlen = ip_masklen (mask); } /* Apply mask for given prefix. */ apply_mask (&p); + /* Administrative distance. */ + if (distance_str) + distance = atoi (distance_str); + else + distance = ZEBRA_STATIC_DISTANCE_DEFAULT; + + /* Null0 static route. */ + if (strncasecmp (gate_str, "Null0", strlen (gate_str)) == 0) + { + if (flag_str) + { + vty_out (vty, "%% can not have flag %s with Null0%s", flag_str, VTY_NEWLINE); + return CMD_WARNING; + } + if (add_cmd) + static_add_ipv4 (&p, NULL, NULL, 0, distance, 0); + else + static_delete_ipv4 (&p, NULL, NULL, distance, 0); + return CMD_SUCCESS; + } + /* Route flags */ if (flag_str) { switch(flag_str[0]) { @@ -134,16 +155,10 @@ zebra_static_ipv4 (struct vty *vty, int add_cmd, break; default: vty_out (vty, "%% Malformed flag %s %s", flag_str, VTY_NEWLINE); - break; + return CMD_WARNING; } } - /* Administrative distance. */ - if (distance_str) - distance = atoi (distance_str); - else - distance = ZEBRA_STATIC_DISTANCE_DEFAULT; - /* When gateway is A.B.C.D format, gate is treated as nexthop address other case gate is treated as interface name. */ ret = inet_aton (gate_str, &gate); @@ -163,12 +178,13 @@ zebra_static_ipv4 (struct vty *vty, int add_cmd, /* Static route configuration. */ DEFUN (ip_route, ip_route_cmd, - "ip route A.B.C.D/M (A.B.C.D|INTERFACE)", + "ip route A.B.C.D/M (A.B.C.D|INTERFACE|null0)", IP_STR "Establish static routes\n" "IP destination prefix (e.g. 10.0.0.0/8)\n" "IP gateway address\n" - "IP gateway interface name\n") + "IP gateway interface name\n" + "Null interface\n") { return zebra_static_ipv4 (vty, 1, argv[0], NULL, argv[1], NULL, NULL); } @@ -190,13 +206,14 @@ DEFUN (ip_route_flags, /* Mask as A.B.C.D format. */ DEFUN (ip_route_mask, ip_route_mask_cmd, - "ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE)", + "ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE|null0)", IP_STR "Establish static routes\n" "IP destination prefix\n" "IP destination prefix mask\n" "IP gateway address\n" - "IP gateway interface name\n") + "IP gateway interface name\n" + "Null interface\n") { return zebra_static_ipv4 (vty, 1, argv[0], argv[1], argv[2], NULL, NULL); } @@ -219,12 +236,13 @@ DEFUN (ip_route_mask_flags, /* Distance option value. */ DEFUN (ip_route_distance, ip_route_distance_cmd, - "ip route A.B.C.D/M (A.B.C.D|INTERFACE) <1-255>", + "ip route A.B.C.D/M (A.B.C.D|INTERFACE|null0) <1-255>", IP_STR "Establish static routes\n" "IP destination prefix (e.g. 10.0.0.0/8)\n" "IP gateway address\n" "IP gateway interface name\n" + "Null interface\n" "Distance value for this route\n") { return zebra_static_ipv4 (vty, 1, argv[0], NULL, argv[1], NULL, argv[2]); @@ -247,13 +265,14 @@ DEFUN (ip_route_flags_distance, DEFUN (ip_route_mask_distance, ip_route_mask_distance_cmd, - "ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE) <1-255>", + "ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE|null0) <1-255>", IP_STR "Establish static routes\n" "IP destination prefix\n" "IP destination prefix mask\n" "IP gateway address\n" "IP gateway interface name\n" + "Null interface\n" "Distance value for this route\n") { return zebra_static_ipv4 (vty, 1, argv[0], argv[1], argv[2], NULL, argv[3]); @@ -277,13 +296,14 @@ DEFUN (ip_route_mask_flags_distance, DEFUN (no_ip_route, no_ip_route_cmd, - "no ip route A.B.C.D/M (A.B.C.D|INTERFACE)", + "no ip route A.B.C.D/M (A.B.C.D|INTERFACE|null0)", NO_STR IP_STR "Establish static routes\n" "IP destination prefix (e.g. 10.0.0.0/8)\n" "IP gateway address\n" - "IP gateway interface name\n") + "IP gateway interface name\n" + "Null interface\n") { return zebra_static_ipv4 (vty, 0, argv[0], NULL, argv[1], NULL, NULL); } @@ -302,14 +322,15 @@ ALIAS (no_ip_route, DEFUN (no_ip_route_mask, no_ip_route_mask_cmd, - "no ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE)", + "no ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE|null0)", NO_STR IP_STR "Establish static routes\n" "IP destination prefix\n" "IP destination prefix mask\n" "IP gateway address\n" - "IP gateway interface name\n") + "IP gateway interface name\n" + "Null interface\n") { return zebra_static_ipv4 (vty, 0, argv[0], argv[1], argv[2], NULL, NULL); } @@ -329,13 +350,14 @@ ALIAS (no_ip_route_mask, DEFUN (no_ip_route_distance, no_ip_route_distance_cmd, - "no ip route A.B.C.D/M (A.B.C.D|INTERFACE) <1-255>", + "no ip route A.B.C.D/M (A.B.C.D|INTERFACE|null0) <1-255>", NO_STR IP_STR "Establish static routes\n" "IP destination prefix (e.g. 10.0.0.0/8)\n" "IP gateway address\n" "IP gateway interface name\n" + "Null interface\n" "Distance value for this route\n") { return zebra_static_ipv4 (vty, 0, argv[0], NULL, argv[1], NULL, argv[2]); @@ -359,7 +381,7 @@ DEFUN (no_ip_route_flags_distance, DEFUN (no_ip_route_mask_distance, no_ip_route_mask_distance_cmd, - "no ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE) <1-255>", + "no ip route A.B.C.D A.B.C.D (A.B.C.D|INTERFACE|null0) <1-255>", NO_STR IP_STR "Establish static routes\n" @@ -367,6 +389,7 @@ DEFUN (no_ip_route_mask_distance, "IP destination prefix mask\n" "IP gateway address\n" "IP gateway interface name\n" + "Null interface\n" "Distance value for this route\n") { return zebra_static_ipv4 (vty, 0, argv[0], argv[1], argv[2], NULL, argv[3]); @@ -461,6 +484,9 @@ vty_show_ip_route_detail (struct vty *vty, struct route_node *rn) case NEXTHOP_TYPE_IFNAME: vty_out (vty, " directly connected, %s", nexthop->ifname); break; + case NEXTHOP_TYPE_BLACKHOLE: + vty_out (vty, " directly connected, via Null0"); + break; default: break; } @@ -541,6 +567,9 @@ vty_show_ip_route (struct vty *vty, struct route_node *rn, struct rib *rib) case NEXTHOP_TYPE_IFNAME: vty_out (vty, " is directly connected, %s", nexthop->ifname); break; + case NEXTHOP_TYPE_BLACKHOLE: + vty_out (vty, " is directly connected, Null0"); + break; default: break; } @@ -930,6 +959,9 @@ static_config_ipv4 (struct vty *vty) case STATIC_IPV4_IFNAME: vty_out (vty, " %s", si->gate.ifname); break; + case STATIC_IPV4_BLACKHOLE: + vty_out (vty, " Null0"); + break; } if (CHECK_FLAG(si->flags, ZEBRA_FLAG_REJECT)) @@ -985,7 +1017,7 @@ static_ipv6_func (struct vty *vty, int add_cmd, char *dest_str, break; default: vty_out (vty, "%% Malformed flag %s %s", flag_str, VTY_NEWLINE); - break; + return CMD_WARNING; } } @@ -1252,7 +1284,7 @@ DEFUN (no_ipv6_route_ifname_flags_pref, return static_ipv6_func (vty, 0, argv[0], argv[1], argv[2], argv[3], argv[4]); } -/* New RIB. Detailed information for IPv4 route. */ +/* New RIB. Detailed information for IPv6 route. */ void vty_show_ipv6_route_detail (struct vty *vty, struct route_node *rn) { diff --git a/zebra/zserv.c b/zebra/zserv.c index ae1e0445..70e7672d 100644 --- a/zebra/zserv.c +++ b/zebra/zserv.c @@ -1098,6 +1098,9 @@ zread_ipv4_add (struct zserv *client, u_short length) case ZEBRA_NEXTHOP_IPV6: stream_forward (s, IPV6_MAX_BYTELEN); break; + case ZEBRA_NEXTHOP_BLACKHOLE: + nexthop_blackhole_add (rib); + break; } } } -- cgit v1.2.1