diff options
Diffstat (limited to 'src/vnet/ipip')
| -rw-r--r-- | src/vnet/ipip/ipip.api | 66 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip.c | 55 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip.h | 3 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip_api.c | 2 | ||||
| -rw-r--r-- | src/vnet/ipip/ipip_cli.c | 1 |
5 files changed, 109 insertions, 18 deletions
diff --git a/src/vnet/ipip/ipip.api b/src/vnet/ipip/ipip.api index 988eee599b1..95fc48a5962 100644 --- a/src/vnet/ipip/ipip.api +++ b/src/vnet/ipip/ipip.api @@ -13,17 +13,46 @@ * limitations under the License. */ -option version = "1.0.0"; +/** + * The IPIP module implements IP{v4,v6} over IP{v4,v6} tunnelling as + * described in RFC2473 and to some extent the largely historical + * RFC1853. The module also supports an IPv4 over IPv6 automatic + * tunnelling mechanism called 6RD (RFC5969). + * + * The IPIP API module supports a CRD model for adding, deleting and + * listing tunnels. A tunnel is represented as an interface in + * VPP. The "handle" representing a tunnel is the sw_if_index. As any + * interface, the user must configure an IPv4 and/or IPv6 address on + * the interface. This is the inner or payload protocol. + * + * Tunnel MTU: The tunnel MTU (the payload MTU) is configurable per + * protocol. If a tunnel MTU is larger than the path MTU, the outer + * packet will be fragmented. Fragmentation support is configurable, + * as it can have severe performance issues, and might be used as an + * attack vector (the remote side must reassemble.) + * + * Traffic class / TOS field can either be configured to a fixed + * value, or can be copied from the inner to the outer header. + * (For now we have stolen ~0 to indicate copy). + * + * Note: + * + * - The Tunnel encapsulation limit described in RFC2473 is not + * implemented. + * + * - ICMP proxying, as in a tunnel head-end receiving ICMP erors on + * the outer packet is currently not relayed to the original source + * of the packet. + * + * - PMTUD / MTU probing and tunnel keepalives are not yet implemented. + * + */ + +option version = "1.1.0"; -/** \brief Create or delete an IPIP tunnel - @param client_index - opaque cookie to identify the sender - @param context - sender context, to match reply w/ request - @param is_ipv6 - Use 0 for IPv4, 1 for IPv6 - @param instance - optional unique custom device instance, else ~0. - @param src_address - Source IP address - @param dst_address - Destination IP address, can be multicast - @param fib_index - Encap FIB table ID -*/ +/** + * Create an IP{v4,v6} over IP{v4,v6} tunnel. + */ define ipip_add_tunnel { u32 client_index; @@ -33,6 +62,8 @@ define ipip_add_tunnel u8 src_address[16]; u8 dst_address[16]; u32 fib_index; + u8 tc_tos; /* If ~0, the TOS/TC value is copied from + inner packet, otherwise set to value */ }; define ipip_add_tunnel_reply @@ -42,6 +73,9 @@ define ipip_add_tunnel_reply u32 sw_if_index; }; +/** + * Delete an IP{v4,v6} over IP{v4,v6} tunnel. + */ autoreply define ipip_del_tunnel { u32 client_index; @@ -49,6 +83,9 @@ autoreply define ipip_del_tunnel u32 sw_if_index; }; +/** + * Create an IPv4 over IPv6 automatic tunnel (6RD) + */ define ipip_6rd_add_tunnel { u32 client_index; @@ -60,6 +97,8 @@ define ipip_6rd_add_tunnel u8 ip6_prefix_len; u8 ip4_prefix_len; u8 security_check; + u8 tc_tos; /* If ~0, the TOS/TC value is copied from + inner packet, otherwise set to value */ }; define ipip_6rd_add_tunnel_reply @@ -69,6 +108,9 @@ define ipip_6rd_add_tunnel_reply u32 sw_if_index; }; +/** + * Delete an IPv4 over IPv6 automatic tunnel (6RD) + */ autoreply define ipip_6rd_del_tunnel { u32 client_index; @@ -76,6 +118,9 @@ autoreply define ipip_6rd_del_tunnel u32 sw_if_index; }; +/** + * List all IPIP tunnels + */ define ipip_tunnel_dump { u32 client_index; @@ -92,6 +137,7 @@ define ipip_tunnel_details u8 src_address[16]; u8 dst_address[16]; u32 fib_index; + u8 tc_tos; }; /* diff --git a/src/vnet/ipip/ipip.c b/src/vnet/ipip/ipip.c index 82c961cdddd..c39d27d5e4f 100644 --- a/src/vnet/ipip/ipip.c +++ b/src/vnet/ipip/ipip.c @@ -74,6 +74,8 @@ ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, ip4->src_address.as_u32 = t->tunnel_src.ip4.as_u32; ip4->dst_address.as_u32 = t->tunnel_dst.ip4.as_u32; ip4->checksum = ip4_header_checksum (ip4); + if (t->tc_tos != 0xFF) + ip4->tos = t->tc_tos; break; case IPIP_TRANSPORT_IP6: @@ -81,6 +83,8 @@ ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, ip6 = (ip6_header_t *) rewrite; ip6->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (6 << 28); + if (t->tc_tos != 0xFF) + ip6_set_traffic_class_network_order (ip6, t->tc_tos); ip6->hop_limit = 64; /* fixup ip6 header length and protocol after-the-fact */ ip6->src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0]; @@ -88,6 +92,7 @@ ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, ip6->dst_address.as_u64[0] = t->tunnel_dst.ip6.as_u64[0]; ip6->dst_address.as_u64[1] = t->tunnel_dst.ip6.as_u64[1]; break; + default: /* pass through */ ; @@ -100,11 +105,29 @@ ipip4_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b, const void *data) { ip4_header_t *ip4; + const ipip_tunnel_t *t = data; ip4 = vlib_buffer_get_current (b); ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b)); - ip4->protocol = - adj->ia_link == VNET_LINK_IP6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP; + switch (adj->ia_link) + { + case VNET_LINK_IP6: + ip4->protocol = IP_PROTOCOL_IPV6; + if (t->tc_tos == 0xFF) + ip4->tos = + ip6_traffic_class_network_order ((const ip6_header_t *) (ip4 + 1)); + break; + + case VNET_LINK_IP4: + ip4->protocol = IP_PROTOCOL_IP_IN_IP; + if (t->tc_tos == 0xFF) + ip4->tos = ((ip4_header_t *) (ip4 + 1))->tos; + break; + + default: + break; + } + ip4->checksum = ip4_header_checksum (ip4); } @@ -113,13 +136,32 @@ ipip6_fixup (vlib_main_t * vm, ip_adjacency_t * adj, vlib_buffer_t * b, const void *data) { ip6_header_t *ip6; + const ipip_tunnel_t *t = data; ip6 = vlib_buffer_get_current (b); ip6->payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - sizeof (*ip6)); - ip6->protocol = - adj->ia_link == VNET_LINK_IP6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP; + switch (adj->ia_link) + { + case VNET_LINK_IP6: + ip6->protocol = IP_PROTOCOL_IPV6; + if (t->tc_tos == 0xFF) + ip6_set_traffic_class_network_order (ip6, + ip6_traffic_class_network_order ((const ip6_header_t *) (ip6 + 1))); + break; + + case VNET_LINK_IP4: + ip6->protocol = IP_PROTOCOL_IP_IN_IP; + if (t->tc_tos == 0xFF) + ip6_set_traffic_class_network_order (ip6, + ((ip4_header_t *) (ip6 + + 1))->tos); + break; + + default: + break; + } } static void @@ -216,7 +258,7 @@ ipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) f = t->transport == IPIP_TRANSPORT_IP6 ? ipip6_fixup : ipip4_fixup; - adj_nbr_midchain_update_rewrite (ai, f, NULL, + adj_nbr_midchain_update_rewrite (ai, f, t, (VNET_LINK_ETHERNET == adj_get_link_type (ai) ? ADJ_FLAG_MIDCHAIN_NO_COUNT : @@ -420,7 +462,7 @@ ipip_fib_delete (ipip_tunnel_t * t) int ipip_add_tunnel (ipip_transport_t transport, u32 instance, ip46_address_t * src, ip46_address_t * dst, - u32 fib_index, u32 * sw_if_indexp) + u32 fib_index, u8 tc_tos, u32 * sw_if_indexp) { ipip_main_t *gm = &ipip_main; vnet_main_t *vnm = gm->vnet_main; @@ -467,6 +509,7 @@ ipip_add_tunnel (ipip_transport_t transport, t->hw_if_index = hw_if_index; t->fib_index = fib_index; t->sw_if_index = sw_if_index; + t->tc_tos = tc_tos; t->transport = transport; vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0); diff --git a/src/vnet/ipip/ipip.h b/src/vnet/ipip/ipip.h index f52094f1f0c..6afb188f8ee 100644 --- a/src/vnet/ipip/ipip.h +++ b/src/vnet/ipip/ipip.h @@ -81,6 +81,7 @@ typedef struct u32 sw_if_index; u32 dev_instance; /* Real device instance in tunnel vector */ u32 user_instance; /* Instance name being shown to user */ + u8 tc_tos; union { @@ -148,7 +149,7 @@ sixrd_get_addr_net (const ipip_tunnel_t * t, u64 dal) int ipip_add_tunnel (ipip_transport_t transport, u32 instance, ip46_address_t * src, ip46_address_t * dst, - u32 fib_index, u32 * sw_if_indexp); + u32 fib_index, u8 tc_tos, u32 * sw_if_indexp); int ipip_del_tunnel (u32 sw_if_index); int sixrd_add_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len, ip4_address_t * ip4_prefix, u8 ip4_prefix_len, diff --git a/src/vnet/ipip/ipip_api.c b/src/vnet/ipip/ipip_api.c index a6633296515..455792ba133 100644 --- a/src/vnet/ipip/ipip_api.c +++ b/src/vnet/ipip/ipip_api.c @@ -69,7 +69,7 @@ vl_api_ipip_add_tunnel_t_handler (vl_api_ipip_add_tunnel_t * mp) rv = ipip_add_tunnel (mp->is_ipv6 ? IPIP_TRANSPORT_IP6 : IPIP_TRANSPORT_IP4, ntohl (mp->instance), &src, &dst, - ntohl (mp->fib_index), &sw_if_index); + ntohl (mp->fib_index), mp->tc_tos, &sw_if_index); /* *INDENT-OFF* */ REPLY_MACRO2(VL_API_IPIP_ADD_TUNNEL_REPLY, diff --git a/src/vnet/ipip/ipip_cli.c b/src/vnet/ipip/ipip_cli.c index 45e6451d69a..7a68c20319e 100644 --- a/src/vnet/ipip/ipip_cli.c +++ b/src/vnet/ipip/ipip_cli.c @@ -72,6 +72,7 @@ static clib_error_t *create_ipip_tunnel_command_fn(vlib_main_t *vm, &src, &dst, fib_index, + 0, &sw_if_index); switch (rv) { |