X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fip%2Fip6.h;h=6e0cfff5164df59b64d88d39d5b7c8faa3092055;hb=2af0e3a;hp=152698733e85678f77235cc2bbb7aaaf5c7143b3;hpb=2b81eb830393fe88c8247cb9015bdaf4060f6ceb;p=vpp.git diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h index 152698733e8..6e0cfff5164 100644 --- a/src/vnet/ip/ip6.h +++ b/src/vnet/ip/ip6.h @@ -40,7 +40,6 @@ #ifndef included_ip_ip6_h #define included_ip_ip6_h -#include #include #include #include @@ -50,6 +49,7 @@ #include #include #include +#include /* * Default size of the ip6 fib hash table @@ -66,14 +66,14 @@ typedef struct typedef struct { + /* required for pool_get_aligned. */ + CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); + /* Table ID (hash key) for this FIB. */ u32 table_id; /* Index into FIB vector. */ u32 index; - - /* flow hash configuration */ - flow_hash_config_t flow_hash_config; } ip6_fib_t; typedef struct ip6_mfib_t @@ -106,6 +106,16 @@ typedef struct uword function_opaque; } ip6_add_del_interface_address_callback_t; +typedef void (ip6_table_bind_function_t) + (struct ip6_main_t * im, + uword opaque, u32 sw_if_index, u32 new_fib_index, u32 old_fib_index); + +typedef struct +{ + ip6_table_bind_function_t *function; + uword function_opaque; +} ip6_table_bind_callback_t; + /** * Enumeration of the FIB table instance types */ @@ -153,6 +163,9 @@ typedef struct ip6_main_t /* Pool of FIBs. */ struct fib_table_t_ *fibs; + /* Pool of V6 FIBs. */ + ip6_fib_t *v6_fibs; + /** Vector of MFIBs. */ struct mfib_table_t_ *mfibs; @@ -183,6 +196,9 @@ typedef struct ip6_main_t ip6_add_del_interface_address_callback_t * add_del_interface_address_callbacks; + /** Functions to call when interface to table biding changes. */ + ip6_table_bind_callback_t *table_bind_callbacks; + /* Template used to generate IP6 neighbor solicitation packets. */ vlib_packet_template_t discover_neighbor_packet_template; @@ -203,8 +219,13 @@ typedef struct ip6_main_t /* HBH processing enabled? */ u8 hbh_enabled; + + /** ND throttling */ + throttle_t nd_throttle; } ip6_main_t; +#define ND_THROTTLE_BITS 512 + /* Global ip6 main structure. */ extern ip6_main_t ip6_main; @@ -217,23 +238,10 @@ extern vlib_node_registration_t ip6_discover_neighbor_node; extern vlib_node_registration_t ip6_glean_node; extern vlib_node_registration_t ip6_midchain_node; -extern vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node; - -/* ipv6 neighbor discovery - timer/event types */ -typedef enum -{ - ICMP6_ND_EVENT_INIT, -} ip6_icmp_neighbor_discovery_event_type_t; - -typedef union -{ - u32 add_del_swindex; - struct - { - u32 up_down_swindex; - u32 fib_index; - } up_down_event; -} ip6_icmp_neighbor_discovery_event_data_t; +extern void ip6_forward_next_trace (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + vlib_rx_or_tx_t which_adj_index); always_inline uword ip6_destination_matches_route (const ip6_main_t * im, @@ -276,25 +284,36 @@ ip6_unaligned_destination_matches_route (ip6_main_t * im, return 1; } +extern int ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr); + always_inline int ip6_src_address_for_packet (ip_lookup_main_t * lm, - u32 sw_if_index, ip6_address_t * src) + u32 sw_if_index, + const ip6_address_t * dst, ip6_address_t * src) { - u32 if_add_index = lm->if_address_pool_index_by_sw_if_index[sw_if_index]; - if (PREDICT_TRUE (if_add_index != ~0)) + if (ip6_address_is_link_local_unicast (dst)) { - ip_interface_address_t *if_add = - pool_elt_at_index (lm->if_address_pool, if_add_index); - ip6_address_t *if_ip = ip_interface_address_get_address (lm, if_add); - *src = *if_ip; - return (0); + return ip6_get_ll_address (sw_if_index, src); } else { - src->as_u64[0] = 0; - src->as_u64[1] = 0; + u32 if_add_index = + lm->if_address_pool_index_by_sw_if_index[sw_if_index]; + if (PREDICT_TRUE (if_add_index != ~0)) + { + ip_interface_address_t *if_add = + pool_elt_at_index (lm->if_address_pool, if_add_index); + ip6_address_t *if_ip = + ip_interface_address_get_address (lm, if_add); + *src = *if_ip; + return (!0); + } } - return (!0); + + src->as_u64[0] = 0; + src->as_u64[1] = 0; + + return (0); } /* Find interface address which matches destination. */ @@ -332,12 +351,15 @@ clib_error_t *ip6_add_del_interface_address (vlib_main_t * vm, u32 address_length, u32 is_del); void ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable); +/** + * @brie get first IPv6 interface address + */ +ip6_address_t *ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index); + int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2); clib_error_t *ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, - u32 sw_if_index); - -clib_error_t *ip6_set_neighbor_limit (u32 neighbor_limit); + u32 sw_if_index, u8 refresh); uword ip6_udp_register_listener (vlib_main_t * vm, @@ -354,19 +376,6 @@ serialize_function_t serialize_vnet_ip6_main, unserialize_vnet_ip6_main; void ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai); -int -vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm, - u32 sw_if_index, - ip6_address_t * a, - u8 * link_layer_address, - uword n_bytes_link_layer_address, - int is_static); -int -vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm, - u32 sw_if_index, - ip6_address_t * a, - u8 * link_layer_address, - uword n_bytes_link_layer_address); void ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip, @@ -379,22 +388,6 @@ ip6_ethernet_mac_address_from_link_local_address (u8 * mac, int vnet_set_ip6_flow_hash (u32 table_id, flow_hash_config_t flow_hash_config); -int -ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index, - u8 suppress, u8 managed, u8 other, - u8 ll_option, u8 send_unicast, u8 cease, - u8 use_lifetime, u32 lifetime, - u32 initial_count, u32 initial_interval, - u32 max_interval, u32 min_interval, u8 is_no); - -int -ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index, - ip6_address_t * prefix_addr, u8 prefix_len, - u8 use_default, u32 val_lifetime, u32 pref_lifetime, - u8 no_advertise, u8 off_link, u8 no_autoconfig, - u8 no_onlink, u8 is_no); - - clib_error_t *enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index); clib_error_t *disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index); @@ -405,12 +398,6 @@ clib_error_t *set_ip6_link_local_address (vlib_main_t * vm, u32 sw_if_index, ip6_address_t * address); -void vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm, - void *address_arg, - uword node_index, - uword type_opaque, - uword data); - int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm, void *data_callback, u32 pid, @@ -423,13 +410,21 @@ int vnet_ip6_nd_term (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * p0, ethernet_header_t * eth, - ip6_header_t * ip, - u32 sw_if_index, u16 bd_index, u8 shg); + ip6_header_t * ip, u32 sw_if_index, u16 bd_index); + +void send_ip6_na (vlib_main_t * vm, u32 sw_if_index); +void send_ip6_na_w_addr (vlib_main_t * vm, + const ip6_address_t * addr, u32 sw_if_index); u8 *format_ip6_forward_next_trace (u8 * s, va_list * args); u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0); +void ip6_punt_policer_add_del (u8 is_add, u32 policer_index); +void ip6_punt_redirect_add (u32 rx_sw_if_index, + u32 tx_sw_if_index, ip46_address_t * nh); +void ip6_punt_redirect_del (u32 rx_sw_if_index); + int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index, u32 table_index); extern vlib_node_registration_t ip6_lookup_node; @@ -440,11 +435,30 @@ always_inline u32 ip6_compute_flow_hash (const ip6_header_t * ip, flow_hash_config_t flow_hash_config) { - tcp_header_t *tcp = (void *) (ip + 1); + tcp_header_t *tcp; u64 a, b, c; u64 t1, t2; - uword is_tcp_udp = (ip->protocol == IP_PROTOCOL_TCP - || ip->protocol == IP_PROTOCOL_UDP); + uword is_tcp_udp = 0; + u8 protocol = ip->protocol; + + if (PREDICT_TRUE + ((ip->protocol == IP_PROTOCOL_TCP) + || (ip->protocol == IP_PROTOCOL_UDP))) + { + is_tcp_udp = 1; + tcp = (void *) (ip + 1); + } + else if (ip->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) + { + ip6_hop_by_hop_header_t *hbh = (ip6_hop_by_hop_header_t *) (ip + 1); + if ((hbh->protocol == IP_PROTOCOL_TCP) || + (hbh->protocol == IP_PROTOCOL_UDP)) + { + is_tcp_udp = 1; + tcp = (tcp_header_t *) ((u8 *) hbh + ((hbh->length + 1) << 3)); + } + protocol = hbh->protocol; + } t1 = (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1]); t1 = (flow_hash_config & IP_FLOW_HASH_SRC_ADDR) ? t1 : 0; @@ -454,14 +468,30 @@ ip6_compute_flow_hash (const ip6_header_t * ip, a = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t2 : t1; b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2; - b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0; - t1 = is_tcp_udp ? tcp->ports.src : 0; - t2 = is_tcp_udp ? tcp->ports.dst : 0; + t1 = is_tcp_udp ? tcp->src : 0; + t2 = is_tcp_udp ? tcp->dst : 0; t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0; t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0; + if (flow_hash_config & IP_FLOW_HASH_SYMMETRIC) + { + if (b < a) + { + c = a; + a = b; + b = c; + } + if (t2 < t1) + { + t2 += t1; + t1 = t2 - t1; + t2 = t2 - t1; + } + } + + b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? protocol : 0; c = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? ((t1 << 16) | t2) : ((t2 << 16) | t1); @@ -469,6 +499,84 @@ ip6_compute_flow_hash (const ip6_header_t * ip, return (u32) c; } +/* ip6_locate_header + * + * This function is to search for the header specified by the protocol number + * in find_hdr_type. + * This is used to locate a specific IPv6 extension header + * or to find transport layer header. + * 1. If the find_hdr_type < 0 then it finds and returns the protocol number and + * offset stored in *offset of the transport or ESP header in the chain if + * found. + * 2. If a header with find_hdr_type > 0 protocol number is found then the + * offset is stored in *offset and protocol number of the header is + * returned. + * 3. If find_hdr_type is not found or packet is malformed or + * it is a non-first fragment -1 is returned. + */ +always_inline int +ip6_locate_header (vlib_buffer_t * p0, + ip6_header_t * ip0, int find_hdr_type, u32 * offset) +{ + u8 next_proto = ip0->protocol; + u8 *next_header; + u8 done = 0; + u32 cur_offset; + u8 *temp_nxthdr = 0; + u32 exthdr_len = 0; + + next_header = ip6_next_header (ip0); + cur_offset = sizeof (ip6_header_t); + while (1) + { + done = (next_proto == find_hdr_type); + if (PREDICT_FALSE + (next_header >= + (u8 *) vlib_buffer_get_current (p0) + p0->current_length)) + { + //A malicious packet could set an extension header with a too big size + return (-1); + } + if (done) + break; + if ((!ip6_ext_hdr (next_proto)) || next_proto == IP_PROTOCOL_IP6_NONXT) + { + if (find_hdr_type < 0) + break; + return -1; + } + if (next_proto == IP_PROTOCOL_IPV6_FRAGMENTATION) + { + ip6_frag_hdr_t *frag_hdr = (ip6_frag_hdr_t *) next_header; + u16 frag_off = ip6_frag_hdr_offset (frag_hdr); + /* Non first fragment return -1 */ + if (frag_off) + return (-1); + exthdr_len = sizeof (ip6_frag_hdr_t); + temp_nxthdr = next_header + exthdr_len; + } + else if (next_proto == IP_PROTOCOL_IPSEC_AH) + { + exthdr_len = + ip6_ext_authhdr_len (((ip6_ext_header_t *) next_header)); + temp_nxthdr = next_header + exthdr_len; + } + else + { + exthdr_len = + ip6_ext_header_len (((ip6_ext_header_t *) next_header)); + temp_nxthdr = next_header + exthdr_len; + } + next_proto = ((ip6_ext_header_t *) next_header)->next_hdr; + next_header = temp_nxthdr; + cur_offset += exthdr_len; + } + + *offset = cur_offset; + return (next_proto); +} + +u8 *format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args); /* * Hop-by-Hop handling */ @@ -492,8 +600,46 @@ int ip6_hbh_register_option (u8 option, int ip6_hbh_unregister_option (u8 option); void ip6_hbh_set_next_override (uword next); -/* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */ -#define OI_DECAP 0x80000000 +/** + * Push IPv6 header to buffer + * + * @param vm - vlib_main + * @param b - buffer to write the header to + * @param src - source IP + * @param dst - destination IP + * @param prot - payload proto + * + * @return - pointer to start of IP header + */ +always_inline void * +vlib_buffer_push_ip6 (vlib_main_t * vm, vlib_buffer_t * b, + ip6_address_t * src, ip6_address_t * dst, int proto) +{ + ip6_header_t *ip6h; + u16 payload_length; + + /* make some room */ + ip6h = vlib_buffer_push_uninit (b, sizeof (ip6_header_t)); + + ip6h->ip_version_traffic_class_and_flow_label = + clib_host_to_net_u32 (0x6 << 28); + + /* calculate ip6 payload length */ + payload_length = vlib_buffer_length_in_chain (vm, b); + payload_length -= sizeof (*ip6h); + + ip6h->payload_length = clib_host_to_net_u16 (payload_length); + + ip6h->hop_limit = 0xff; + ip6h->protocol = proto; + clib_memcpy_fast (ip6h->src_address.as_u8, src->as_u8, + sizeof (ip6h->src_address)); + clib_memcpy_fast (ip6h->dst_address.as_u8, dst->as_u8, + sizeof (ip6h->src_address)); + b->flags |= VNET_BUFFER_F_IS_IP6; + + return ip6h; +} #endif /* included_ip_ip6_h */