X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fnat64_in2out.c;h=718c69d7bdf2e7672434afc7fe94423c7a4b1d58;hb=8fed4240be68b2b4b4b6c531233044f3f1ac70c4;hp=f78baff4e12da67eec3c00ed5ce817e55aed3084;hpb=2ba92e32e0197f676dd905e5edcb4ff3e1bec241;p=vpp.git diff --git a/src/plugins/nat/nat64_in2out.c b/src/plugins/nat/nat64_in2out.c index f78baff4e12..718c69d7bdf 100644 --- a/src/plugins/nat/nat64_in2out.c +++ b/src/plugins/nat/nat64_in2out.c @@ -18,6 +18,8 @@ */ #include +#include +#include #include #include @@ -45,14 +47,43 @@ format_nat64_in2out_trace (u8 * s, va_list * args) return s; } +typedef struct +{ + u32 sw_if_index; + u32 next_index; + u8 cached; +} nat64_in2out_reass_trace_t; + +static u8 * +format_nat64_in2out_reass_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + nat64_in2out_reass_trace_t *t = + va_arg (*args, nat64_in2out_reass_trace_t *); + + s = + format (s, "NAT64-in2out-reass: sw_if_index %d, next index %d, status %s", + t->sw_if_index, t->next_index, + t->cached ? "cached" : "translated"); + + return s; +} + vlib_node_registration_t nat64_in2out_node; vlib_node_registration_t nat64_in2out_slowpath_node; +vlib_node_registration_t nat64_in2out_reass_node; +vlib_node_registration_t nat64_in2out_handoff_node; + +#define foreach_nat64_in2out_error \ +_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \ +_(IN2OUT_PACKETS, "good in2out packets processed") \ +_(NO_TRANSLATION, "no translation") \ +_(UNKNOWN, "unknown") \ +_(DROP_FRAGMENT, "Drop fragment") \ +_(MAX_REASS, "Maximum reassemblies exceeded") \ +_(MAX_FRAG, "Maximum fragments per reassembly exceeded") -#define foreach_nat64_in2out_error \ -_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \ -_(IN2OUT_PACKETS, "good in2out packets processed") \ -_(NO_TRANSLATION, "no translation") \ -_(UNKNOWN, "unknown") typedef enum { @@ -74,6 +105,7 @@ typedef enum NAT64_IN2OUT_NEXT_IP6_LOOKUP, NAT64_IN2OUT_NEXT_DROP, NAT64_IN2OUT_NEXT_SLOWPATH, + NAT64_IN2OUT_NEXT_REASS, NAT64_IN2OUT_N_NEXT, } nat64_in2out_next_t; @@ -81,8 +113,29 @@ typedef struct nat64_in2out_set_ctx_t_ { vlib_buffer_t *b; vlib_main_t *vm; + u32 thread_index; } nat64_in2out_set_ctx_t; +static inline u8 +nat64_not_translate (u32 sw_if_index, ip6_address_t ip6_addr) +{ + ip6_address_t *addr; + ip6_main_t *im6 = &ip6_main; + ip_lookup_main_t *lm6 = &im6->lookup_main; + ip_interface_address_t *ia = 0; + + /* *INDENT-OFF* */ + foreach_ip_interface_address (lm6, ia, sw_if_index, 0, + ({ + addr = ip_interface_address_get_address (lm6, ia); + if (0 == ip6_address_compare (addr, &ip6_addr)) + return 1; + })); + /* *INDENT-ON* */ + + return 0; +} + /** * @brief Check whether is a hairpinning. * @@ -122,6 +175,7 @@ nat64_in2out_tcp_udp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, u8 proto = ip6->protocol; u16 sport = udp->src_port; u16 dport = udp->dst_port; + nat64_db_t *db = &nm->db[ctx->thread_index]; sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; fib_index = @@ -133,19 +187,18 @@ nat64_in2out_tcp_udp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, daddr.as_u64[1] = ip6->dst_address.as_u64[1]; ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto, + nat64_db_st_entry_find (db, &saddr, &daddr, sport, dport, proto, fib_index, 1); if (ste) { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; } else { - bibe = - nat64_db_bib_entry_find (&nm->db, &saddr, sport, proto, fib_index, 1); + bibe = nat64_db_bib_entry_find (db, &saddr, sport, proto, fib_index, 1); if (!bibe) { @@ -153,27 +206,24 @@ nat64_in2out_tcp_udp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, ip4_address_t out_addr; if (nat64_alloc_out_addr_and_port (fib_index, ip_proto_to_snat_proto (proto), &out_addr, - &out_port)) + &out_port, ctx->thread_index)) return -1; bibe = - nat64_db_bib_entry_create (&nm->db, &ip6->src_address, &out_addr, - sport, clib_host_to_net_u16 (out_port), - fib_index, proto, 0); + nat64_db_bib_entry_create (db, &ip6->src_address, &out_addr, + sport, out_port, fib_index, proto, 0); if (!bibe) return -1; } nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index); ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address, + nat64_db_st_entry_create (db, bibe, &ip6->dst_address, &daddr.ip4, dport); if (!ste) return -1; } - nat64_session_reset_timeout (ste, ctx->vm); - ip4->src_address.as_u32 = bibe->out_addr.as_u32; udp->src_port = bibe->out_port; @@ -185,12 +235,15 @@ nat64_in2out_tcp_udp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, ip_csum_t csum; tcp_header_t *tcp = ip6_next_header (ip6); + nat64_tcp_session_set_state (ste, tcp, 1); checksum = &tcp->checksum; csum = ip_csum_sub_even (*checksum, sport); csum = ip_csum_add_even (csum, udp->src_port); *checksum = ip_csum_fold (csum); } + nat64_session_reset_timeout (ste, ctx->vm); + return 0; } @@ -204,6 +257,7 @@ nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) ip46_address_t saddr, daddr; u32 sw_if_index, fib_index; icmp46_header_t *icmp = ip6_next_header (ip6); + nat64_db_t *db = &nm->db[ctx->thread_index]; sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; fib_index = @@ -218,13 +272,13 @@ nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) { u16 in_id = ((u16 *) (icmp))[2]; ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, in_id, 0, + nat64_db_st_entry_find (db, &saddr, &daddr, in_id, 0, IP_PROTOCOL_ICMP, fib_index, 1); if (ste) { bibe = - nat64_db_bib_entry_by_index (&nm->db, IP_PROTOCOL_ICMP, + nat64_db_bib_entry_by_index (db, IP_PROTOCOL_ICMP, ste->bibe_index); if (!bibe) return -1; @@ -232,7 +286,7 @@ nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) else { bibe = - nat64_db_bib_entry_find (&nm->db, &saddr, in_id, + nat64_db_bib_entry_find (db, &saddr, in_id, IP_PROTOCOL_ICMP, fib_index, 1); if (!bibe) @@ -240,13 +294,13 @@ nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) u16 out_id; ip4_address_t out_addr; if (nat64_alloc_out_addr_and_port - (fib_index, SNAT_PROTOCOL_ICMP, &out_addr, &out_id)) + (fib_index, SNAT_PROTOCOL_ICMP, &out_addr, &out_id, + ctx->thread_index)) return -1; bibe = - nat64_db_bib_entry_create (&nm->db, &ip6->src_address, - &out_addr, in_id, - clib_host_to_net_u16 (out_id), + nat64_db_bib_entry_create (db, &ip6->src_address, + &out_addr, in_id, out_id, fib_index, IP_PROTOCOL_ICMP, 0); if (!bibe) return -1; @@ -254,7 +308,7 @@ nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index); ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address, + nat64_db_st_entry_create (db, bibe, &ip6->dst_address, &daddr.ip4, 0); if (!ste) return -1; @@ -290,6 +344,7 @@ nat64_in2out_inner_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, ip46_address_t saddr, daddr; u32 sw_if_index, fib_index; u8 proto = ip6->protocol; + nat64_db_t *db = &nm->db[ctx->thread_index]; sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; fib_index = @@ -312,12 +367,12 @@ nat64_in2out_inner_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, return -1; ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, in_id, 0, proto, + nat64_db_st_entry_find (db, &daddr, &saddr, in_id, 0, proto, fib_index, 1); if (!ste) return -1; - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; @@ -336,12 +391,12 @@ nat64_in2out_inner_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, u16 dport = udp->dst_port; ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto, + nat64_db_st_entry_find (db, &daddr, &saddr, dport, sport, proto, fib_index, 1); if (!ste) return -1; - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; @@ -367,6 +422,7 @@ typedef struct unk_proto_st_walk_ctx_t_ ip6_address_t dst_addr; ip4_address_t out_addr; u32 fib_index; + u32 thread_index; u8 proto; } unk_proto_st_walk_ctx_t; @@ -377,11 +433,11 @@ unk_proto_st_walk (nat64_db_st_entry_t * ste, void *arg) unk_proto_st_walk_ctx_t *ctx = arg; nat64_db_bib_entry_t *bibe; ip46_address_t saddr, daddr; + nat64_db_t *db = &nm->db[ctx->thread_index]; if (ip46_address_is_equal (&ste->in_r_addr, &ctx->dst_addr)) { - bibe = - nat64_db_bib_entry_by_index (&nm->db, ste->proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, ste->proto, ste->bibe_index); if (!bibe) return -1; @@ -394,7 +450,7 @@ unk_proto_st_walk (nat64_db_st_entry_t * ste, void *arg) nat64_extract_ip4 (&ctx->dst_addr, &daddr.ip4, ctx->fib_index); if (nat64_db_st_entry_find - (&nm->db, &daddr, &saddr, 0, 0, ctx->proto, ctx->fib_index, 0)) + (db, &daddr, &saddr, 0, 0, ctx->proto, ctx->fib_index, 0)) return -1; ctx->out_addr.as_u32 = bibe->out_addr.as_u32; @@ -410,15 +466,16 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) { nat64_main_t *nm = &nat64_main; - nat64_in2out_set_ctx_t *ctx = arg; + nat64_in2out_set_ctx_t *s_ctx = arg; nat64_db_bib_entry_t *bibe; nat64_db_st_entry_t *ste; ip46_address_t saddr, daddr, addr; u32 sw_if_index, fib_index; u8 proto = ip6->protocol; int i; + nat64_db_t *db = &nm->db[s_ctx->thread_index]; - sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; + sw_if_index = vnet_buffer (s_ctx->b)->sw_if_index[VLIB_RX]; fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index); @@ -428,19 +485,17 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, daddr.as_u64[1] = ip6->dst_address.as_u64[1]; ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, 0, 0, proto, fib_index, - 1); + nat64_db_st_entry_find (db, &saddr, &daddr, 0, 0, proto, fib_index, 1); if (ste) { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; } else { - bibe = - nat64_db_bib_entry_find (&nm->db, &saddr, 0, proto, fib_index, 1); + bibe = nat64_db_bib_entry_find (db, &saddr, 0, proto, fib_index, 1); if (!bibe) { @@ -453,19 +508,18 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, .out_addr.as_u32 = 0, .fib_index = fib_index, .proto = proto, + .thread_index = s_ctx->thread_index, }; - nat64_db_st_walk (&nm->db, IP_PROTOCOL_TCP, unk_proto_st_walk, - &ctx); + nat64_db_st_walk (db, IP_PROTOCOL_TCP, unk_proto_st_walk, &ctx); if (!ctx.out_addr.as_u32) - nat64_db_st_walk (&nm->db, IP_PROTOCOL_UDP, unk_proto_st_walk, - &ctx); + nat64_db_st_walk (db, IP_PROTOCOL_UDP, unk_proto_st_walk, &ctx); /* Verify if out address is not already in use for protocol */ memset (&addr, 0, sizeof (addr)); addr.ip4.as_u32 = ctx.out_addr.as_u32; - if (nat64_db_bib_entry_find (&nm->db, &addr, 0, proto, 0, 0)) + if (nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0)) ctx.out_addr.as_u32 = 0; if (!ctx.out_addr.as_u32) @@ -473,8 +527,7 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, for (i = 0; i < vec_len (nm->addr_pool); i++) { addr.ip4.as_u32 = nm->addr_pool[i].addr.as_u32; - if (!nat64_db_bib_entry_find - (&nm->db, &addr, 0, proto, 0, 0)) + if (!nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0)) break; } } @@ -483,7 +536,7 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, return -1; bibe = - nat64_db_bib_entry_create (&nm->db, &ip6->src_address, + nat64_db_bib_entry_create (db, &ip6->src_address, &ctx.out_addr, 0, 0, fib_index, proto, 0); if (!bibe) @@ -492,13 +545,12 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index); ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address, - &daddr.ip4, 0); + nat64_db_st_entry_create (db, bibe, &ip6->dst_address, &daddr.ip4, 0); if (!ste) return -1; } - nat64_session_reset_timeout (ste, ctx->vm); + nat64_session_reset_timeout (ste, s_ctx->vm); ip4->src_address.as_u32 = bibe->out_addr.as_u32; ip4->dst_address.as_u32 = ste->out_r_addr.as_u32; @@ -510,7 +562,7 @@ nat64_in2out_unk_proto_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, static int nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, - ip6_header_t * ip6) + ip6_header_t * ip6, u32 thread_index) { nat64_main_t *nm = &nat64_main; nat64_db_bib_entry_t *bibe; @@ -524,6 +576,7 @@ nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, u16 dport = udp->dst_port; u16 *checksum; ip_csum_t csum; + nat64_db_t *db = &nm->db[thread_index]; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; fib_index = @@ -547,19 +600,18 @@ nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, csum = ip_csum_sub_even (csum, dport); ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto, + nat64_db_st_entry_find (db, &saddr, &daddr, sport, dport, proto, fib_index, 1); if (ste) { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; } else { - bibe = - nat64_db_bib_entry_find (&nm->db, &saddr, sport, proto, fib_index, 1); + bibe = nat64_db_bib_entry_find (db, &saddr, sport, proto, fib_index, 1); if (!bibe) { @@ -567,56 +619,48 @@ nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, ip4_address_t out_addr; if (nat64_alloc_out_addr_and_port (fib_index, ip_proto_to_snat_proto (proto), &out_addr, - &out_port)) + &out_port, thread_index)) return -1; bibe = - nat64_db_bib_entry_create (&nm->db, &ip6->src_address, &out_addr, - sport, clib_host_to_net_u16 (out_port), - fib_index, proto, 0); + nat64_db_bib_entry_create (db, &ip6->src_address, &out_addr, + sport, out_port, fib_index, proto, 0); if (!bibe) return -1; } nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index); ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address, + nat64_db_st_entry_create (db, bibe, &ip6->dst_address, &daddr.ip4, dport); if (!ste) return -1; } + if (proto == IP_PROTOCOL_TCP) + nat64_tcp_session_set_state (ste, tcp, 1); + nat64_session_reset_timeout (ste, vm); sport = udp->src_port = bibe->out_port; nat64_compose_ip6 (&ip6->src_address, &bibe->out_addr, fib_index); - memset (&saddr, 0, sizeof (saddr)); memset (&daddr, 0, sizeof (daddr)); - saddr.ip4.as_u32 = bibe->out_addr.as_u32; daddr.ip4.as_u32 = ste->out_r_addr.as_u32; - ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto, 0, - 0); - - if (ste) + bibe = 0; + /* *INDENT-OFF* */ + vec_foreach (db, nm->db) { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - } - else - { - bibe = nat64_db_bib_entry_find (&nm->db, &daddr, dport, proto, 0, 0); - - if (!bibe) - return -1; + bibe = nat64_db_bib_entry_find (db, &daddr, dport, proto, 0, 0); - ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->src_address, - &saddr.ip4, sport); + if (bibe) + break; } + /* *INDENT-ON* */ + + if (!bibe) + return -1; ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; @@ -635,7 +679,7 @@ nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, static int nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, - ip6_header_t * ip6) + ip6_header_t * ip6, u32 thread_index) { nat64_main_t *nm = &nat64_main; nat64_db_bib_entry_t *bibe; @@ -649,6 +693,7 @@ nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, tcp_header_t *tcp; u16 *checksum, sport, dport; ip_csum_t csum; + nat64_db_t *db = &nm->db[thread_index]; if (icmp->type == ICMP6_echo_request || icmp->type == ICMP6_echo_reply) return -1; @@ -688,12 +733,12 @@ nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, csum = ip_csum_sub_even (csum, dport); ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto, + nat64_db_st_entry_find (db, &daddr, &saddr, dport, sport, proto, fib_index, 1); if (!ste) return -1; - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; @@ -705,13 +750,22 @@ nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, saddr.ip4.as_u32 = ste->out_r_addr.as_u32; daddr.ip4.as_u32 = bibe->out_addr.as_u32; - ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto, 0, - 0); + ste = 0; + /* *INDENT-OFF* */ + vec_foreach (db, nm->db) + { + ste = nat64_db_st_entry_find (db, &saddr, &daddr, sport, dport, proto, + 0, 0); + + if (ste) + break; + } + /* *INDENT-ON* */ + if (!ste) return -1; - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; @@ -751,7 +805,7 @@ nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, static int nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, - ip6_header_t * ip6) + ip6_header_t * ip6, u32 thread_index) { nat64_main_t *nm = &nat64_main; nat64_db_bib_entry_t *bibe; @@ -760,6 +814,7 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, u32 sw_if_index, fib_index; u8 proto = ip6->protocol; int i; + nat64_db_t *db = &nm->db[thread_index]; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; fib_index = @@ -771,19 +826,17 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, daddr.as_u64[1] = ip6->dst_address.as_u64[1]; ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, 0, 0, proto, fib_index, - 1); + nat64_db_st_entry_find (db, &saddr, &daddr, 0, 0, proto, fib_index, 1); if (ste) { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); + bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index); if (!bibe) return -1; } else { - bibe = - nat64_db_bib_entry_find (&nm->db, &saddr, 0, proto, fib_index, 1); + bibe = nat64_db_bib_entry_find (db, &saddr, 0, proto, fib_index, 1); if (!bibe) { @@ -796,19 +849,18 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, .out_addr.as_u32 = 0, .fib_index = fib_index, .proto = proto, + .thread_index = thread_index, }; - nat64_db_st_walk (&nm->db, IP_PROTOCOL_TCP, unk_proto_st_walk, - &ctx); + nat64_db_st_walk (db, IP_PROTOCOL_TCP, unk_proto_st_walk, &ctx); if (!ctx.out_addr.as_u32) - nat64_db_st_walk (&nm->db, IP_PROTOCOL_UDP, unk_proto_st_walk, - &ctx); + nat64_db_st_walk (db, IP_PROTOCOL_UDP, unk_proto_st_walk, &ctx); /* Verify if out address is not already in use for protocol */ memset (&addr, 0, sizeof (addr)); addr.ip4.as_u32 = ctx.out_addr.as_u32; - if (nat64_db_bib_entry_find (&nm->db, &addr, 0, proto, 0, 0)) + if (nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0)) ctx.out_addr.as_u32 = 0; if (!ctx.out_addr.as_u32) @@ -816,8 +868,7 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, for (i = 0; i < vec_len (nm->addr_pool); i++) { addr.ip4.as_u32 = nm->addr_pool[i].addr.as_u32; - if (!nat64_db_bib_entry_find - (&nm->db, &addr, 0, proto, 0, 0)) + if (!nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0)) break; } } @@ -826,7 +877,7 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, return -1; bibe = - nat64_db_bib_entry_create (&nm->db, &ip6->src_address, + nat64_db_bib_entry_create (db, &ip6->src_address, &ctx.out_addr, 0, 0, fib_index, proto, 0); if (!bibe) @@ -835,8 +886,7 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index); ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address, - &daddr.ip4, 0); + nat64_db_st_entry_create (db, bibe, &ip6->dst_address, &daddr.ip4, 0); if (!ste) return -1; } @@ -845,30 +895,22 @@ nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b, nat64_compose_ip6 (&ip6->src_address, &bibe->out_addr, fib_index); - memset (&saddr, 0, sizeof (saddr)); memset (&daddr, 0, sizeof (daddr)); - saddr.ip4.as_u32 = bibe->out_addr.as_u32; daddr.ip4.as_u32 = ste->out_r_addr.as_u32; - ste = nat64_db_st_entry_find (&nm->db, &daddr, &saddr, 0, 0, proto, 0, 0); - - if (ste) - { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - } - else + bibe = 0; + /* *INDENT-OFF* */ + vec_foreach (db, nm->db) { - bibe = nat64_db_bib_entry_find (&nm->db, &daddr, 0, proto, 0, 0); + bibe = nat64_db_bib_entry_find (db, &daddr, 0, proto, 0, 0); - if (!bibe) - return -1; - - ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6->src_address, - &saddr.ip4, 0); + if (bibe) + break; } + /* *INDENT-ON* */ + + if (!bibe) + return -1; ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; @@ -884,6 +926,7 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, nat64_in2out_next_t next_index; u32 pkts_processed = 0; u32 stats_node_index; + u32 thread_index = vm->thread_index; stats_node_index = is_slow_path ? nat64_in2out_slowpath_node.index : nat64_in2out_node.index; @@ -908,6 +951,7 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, u8 l4_protocol0; u32 proto0; nat64_in2out_set_ctx_t ctx0; + u32 sw_if_index0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; @@ -922,6 +966,7 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, ctx0.b = b0; ctx0.vm = vm; + ctx0.thread_index = thread_index; next0 = NAT64_IN2OUT_NEXT_IP4_LOOKUP; @@ -935,15 +980,16 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, goto trace0; } - proto0 = ip_proto_to_snat_proto (l4_protocol0); - if (frag_offset0 != 0) + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + + if (nat64_not_translate (sw_if_index0, ip60->dst_address)) { - next0 = NAT64_IN2OUT_NEXT_DROP; - b0->error = - node->errors[NAT64_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP; goto trace0; } + proto0 = ip_proto_to_snat_proto (l4_protocol0); + if (is_slow_path) { if (PREDICT_TRUE (proto0 == ~0)) @@ -951,7 +997,8 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (is_hairpinning (&ip60->dst_address)) { next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP; - if (nat64_in2out_unk_proto_hairpinning (vm, b0, ip60)) + if (nat64_in2out_unk_proto_hairpinning + (vm, b0, ip60, thread_index)) { next0 = NAT64_IN2OUT_NEXT_DROP; b0->error = @@ -979,12 +1026,20 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, } } + if (PREDICT_FALSE + (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)) + { + next0 = NAT64_IN2OUT_NEXT_REASS; + goto trace0; + } + if (proto0 == SNAT_PROTOCOL_ICMP) { if (is_hairpinning (&ip60->dst_address)) { next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP; - if (nat64_in2out_icmp_hairpinning (vm, b0, ip60)) + if (nat64_in2out_icmp_hairpinning + (vm, b0, ip60, thread_index)) { next0 = NAT64_IN2OUT_NEXT_DROP; b0->error = @@ -1007,7 +1062,8 @@ nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (is_hairpinning (&ip60->dst_address)) { next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP; - if (nat64_in2out_tcp_udp_hairpinning (vm, b0, ip60)) + if (nat64_in2out_tcp_udp_hairpinning + (vm, b0, ip60, thread_index)) { next0 = NAT64_IN2OUT_NEXT_DROP; b0->error = @@ -1073,6 +1129,7 @@ VLIB_REGISTER_NODE (nat64_in2out_node) = { [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup", [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup", [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath", + [NAT64_IN2OUT_NEXT_REASS] = "nat64-in2out-reass", }, }; /* *INDENT-ON* */ @@ -1102,6 +1159,7 @@ VLIB_REGISTER_NODE (nat64_in2out_slowpath_node) = { [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup", [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup", [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath", + [NAT64_IN2OUT_NEXT_REASS] = "nat64-in2out-reass", }, }; /* *INDENT-ON* */ @@ -1109,6 +1167,662 @@ VLIB_REGISTER_NODE (nat64_in2out_slowpath_node) = { VLIB_NODE_FUNCTION_MULTIARCH (nat64_in2out_slowpath_node, nat64_in2out_slowpath_node_fn); +typedef struct nat64_in2out_frag_set_ctx_t_ +{ + vlib_main_t *vm; + u32 sess_index; + u32 thread_index; + u16 l4_offset; + u8 proto; + u8 first_frag; +} nat64_in2out_frag_set_ctx_t; + +static int +nat64_in2out_frag_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) +{ + nat64_main_t *nm = &nat64_main; + nat64_in2out_frag_set_ctx_t *ctx = arg; + nat64_db_st_entry_t *ste; + nat64_db_bib_entry_t *bibe; + udp_header_t *udp; + nat64_db_t *db = &nm->db[ctx->thread_index]; + + ste = nat64_db_st_entry_by_index (db, ctx->proto, ctx->sess_index); + if (!ste) + return -1; + + bibe = nat64_db_bib_entry_by_index (db, ctx->proto, ste->bibe_index); + if (!bibe) + return -1; + + nat64_session_reset_timeout (ste, ctx->vm); + + if (ctx->first_frag) + { + udp = (udp_header_t *) u8_ptr_add (ip6, ctx->l4_offset); + + if (ctx->proto == IP_PROTOCOL_TCP) + { + u16 *checksum; + ip_csum_t csum; + tcp_header_t *tcp = (tcp_header_t *) udp; + + nat64_tcp_session_set_state (ste, tcp, 1); + checksum = &tcp->checksum; + csum = ip_csum_sub_even (*checksum, tcp->src_port); + csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[0]); + csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]); + csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]); + csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]); + csum = ip_csum_add_even (csum, bibe->out_port); + csum = ip_csum_add_even (csum, bibe->out_addr.as_u32); + csum = ip_csum_add_even (csum, ste->out_r_addr.as_u32); + *checksum = ip_csum_fold (csum); + } + + udp->src_port = bibe->out_port; + } + + ip4->src_address.as_u32 = bibe->out_addr.as_u32; + ip4->dst_address.as_u32 = ste->out_r_addr.as_u32; + + return 0; +} + +static int +nat64_in2out_frag_hairpinning (vlib_buffer_t * b, ip6_header_t * ip6, + nat64_in2out_frag_set_ctx_t * ctx) +{ + nat64_main_t *nm = &nat64_main; + nat64_db_st_entry_t *ste; + nat64_db_bib_entry_t *bibe; + udp_header_t *udp = (udp_header_t *) u8_ptr_add (ip6, ctx->l4_offset); + tcp_header_t *tcp = (tcp_header_t *) udp; + u16 sport = udp->src_port; + u16 dport = udp->dst_port; + u16 *checksum; + ip_csum_t csum; + ip46_address_t daddr; + nat64_db_t *db = &nm->db[ctx->thread_index]; + + if (ctx->first_frag) + { + if (ctx->proto == IP_PROTOCOL_UDP) + checksum = &udp->checksum; + else + checksum = &tcp->checksum; + + csum = ip_csum_sub_even (*checksum, ip6->src_address.as_u64[0]); + csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]); + csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]); + csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]); + csum = ip_csum_sub_even (csum, sport); + csum = ip_csum_sub_even (csum, dport); + } + + ste = nat64_db_st_entry_by_index (db, ctx->proto, ctx->sess_index); + if (!ste) + return -1; + + bibe = nat64_db_bib_entry_by_index (db, ctx->proto, ste->bibe_index); + if (!bibe) + return -1; + + if (ctx->proto == IP_PROTOCOL_TCP) + nat64_tcp_session_set_state (ste, tcp, 1); + + nat64_session_reset_timeout (ste, ctx->vm); + + sport = bibe->out_port; + dport = ste->r_port; + + nat64_compose_ip6 (&ip6->src_address, &bibe->out_addr, bibe->fib_index); + + memset (&daddr, 0, sizeof (daddr)); + daddr.ip4.as_u32 = ste->out_r_addr.as_u32; + + bibe = 0; + /* *INDENT-OFF* */ + vec_foreach (db, nm->db) + { + bibe = nat64_db_bib_entry_find (db, &daddr, dport, ctx->proto, 0, 0); + + if (bibe) + break; + } + /* *INDENT-ON* */ + + if (!bibe) + return -1; + + ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; + ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; + + if (ctx->first_frag) + { + udp->dst_port = bibe->in_port; + udp->src_port = sport; + csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]); + csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]); + csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]); + csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]); + csum = ip_csum_add_even (csum, udp->src_port); + csum = ip_csum_add_even (csum, udp->dst_port); + *checksum = ip_csum_fold (csum); + } + + return 0; +} + +static uword +nat64_in2out_reass_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + nat64_in2out_next_t next_index; + u32 pkts_processed = 0; + u32 *fragments_to_drop = 0; + u32 *fragments_to_loopback = 0; + nat64_main_t *nm = &nat64_main; + u32 thread_index = vm->thread_index; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + u8 cached0 = 0; + ip6_header_t *ip60; + u16 l4_offset0, frag_offset0; + u8 l4_protocol0; + nat_reass_ip6_t *reass0; + ip6_frag_hdr_t *frag0; + nat64_db_bib_entry_t *bibe0; + nat64_db_st_entry_t *ste0; + udp_header_t *udp0; + snat_protocol_t proto0; + u32 sw_if_index0, fib_index0; + ip46_address_t saddr0, daddr0; + nat64_in2out_frag_set_ctx_t ctx0; + nat64_db_t *db = &nm->db[thread_index]; + + /* speculatively enqueue b0 to the current next frame */ + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + next0 = NAT64_IN2OUT_NEXT_IP4_LOOKUP; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, + sw_if_index0); + + ctx0.thread_index = thread_index; + + if (PREDICT_FALSE (nat_reass_is_drop_frag (1))) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_DROP_FRAGMENT]; + goto trace0; + } + + ip60 = (ip6_header_t *) vlib_buffer_get_current (b0); + + if (PREDICT_FALSE + (ip6_parse + (ip60, b0->current_length, &l4_protocol0, &l4_offset0, + &frag_offset0))) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_UNKNOWN]; + goto trace0; + } + + if (PREDICT_FALSE + (!(l4_protocol0 == IP_PROTOCOL_TCP + || l4_protocol0 == IP_PROTOCOL_UDP))) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_DROP_FRAGMENT]; + goto trace0; + } + + udp0 = (udp_header_t *) u8_ptr_add (ip60, l4_offset0); + frag0 = (ip6_frag_hdr_t *) u8_ptr_add (ip60, frag_offset0); + proto0 = ip_proto_to_snat_proto (l4_protocol0); + + reass0 = nat_ip6_reass_find_or_create (ip60->src_address, + ip60->dst_address, + frag0->identification, + l4_protocol0, + 1, &fragments_to_drop); + + if (PREDICT_FALSE (!reass0)) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_MAX_REASS]; + goto trace0; + } + + if (PREDICT_TRUE (ip6_frag_hdr_offset (frag0))) + { + ctx0.first_frag = 0; + if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0)) + { + if (nat_ip6_reass_add_fragment (reass0, bi0)) + { + b0->error = node->errors[NAT64_IN2OUT_ERROR_MAX_FRAG]; + next0 = NAT64_IN2OUT_NEXT_DROP; + goto trace0; + } + cached0 = 1; + goto trace0; + } + } + else + { + ctx0.first_frag = 1; + + saddr0.as_u64[0] = ip60->src_address.as_u64[0]; + saddr0.as_u64[1] = ip60->src_address.as_u64[1]; + daddr0.as_u64[0] = ip60->dst_address.as_u64[0]; + daddr0.as_u64[1] = ip60->dst_address.as_u64[1]; + + ste0 = + nat64_db_st_entry_find (db, &saddr0, &daddr0, + udp0->src_port, udp0->dst_port, + l4_protocol0, fib_index0, 1); + if (!ste0) + { + bibe0 = + nat64_db_bib_entry_find (db, &saddr0, udp0->src_port, + l4_protocol0, fib_index0, 1); + if (!bibe0) + { + u16 out_port0; + ip4_address_t out_addr0; + if (nat64_alloc_out_addr_and_port + (fib_index0, proto0, &out_addr0, &out_port0, + thread_index)) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = + node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION]; + goto trace0; + } + + bibe0 = + nat64_db_bib_entry_create (db, + &ip60->src_address, + &out_addr0, udp0->src_port, + out_port0, fib_index0, + l4_protocol0, 0); + if (!bibe0) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = + node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION]; + goto trace0; + } + } + nat64_extract_ip4 (&ip60->dst_address, &daddr0.ip4, + fib_index0); + ste0 = + nat64_db_st_entry_create (db, bibe0, + &ip60->dst_address, &daddr0.ip4, + udp0->dst_port); + if (!ste0) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = + node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION]; + goto trace0; + } + } + reass0->sess_index = nat64_db_st_entry_get_index (db, ste0); + + nat_ip6_reass_get_frags (reass0, &fragments_to_loopback); + } + + ctx0.sess_index = reass0->sess_index; + ctx0.proto = l4_protocol0; + ctx0.vm = vm; + ctx0.l4_offset = l4_offset0; + + if (PREDICT_FALSE (is_hairpinning (&ip60->dst_address))) + { + next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP; + if (nat64_in2out_frag_hairpinning (b0, ip60, &ctx0)) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION]; + } + goto trace0; + } + else + { + if (ip6_to_ip4_fragmented (b0, nat64_in2out_frag_set_cb, &ctx0)) + { + next0 = NAT64_IN2OUT_NEXT_DROP; + b0->error = node->errors[NAT64_IN2OUT_ERROR_UNKNOWN]; + goto trace0; + } + } + + trace0: + if (PREDICT_FALSE + ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat64_in2out_reass_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->cached = cached0; + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + + if (cached0) + { + n_left_to_next++; + to_next--; + } + else + { + pkts_processed += next0 != NAT64_IN2OUT_NEXT_DROP; + + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + if (n_left_from == 0 && vec_len (fragments_to_loopback)) + { + from = vlib_frame_vector_args (frame); + u32 len = vec_len (fragments_to_loopback); + if (len <= VLIB_FRAME_SIZE) + { + clib_memcpy (from, fragments_to_loopback, + sizeof (u32) * len); + n_left_from = len; + vec_reset_length (fragments_to_loopback); + } + else + { + clib_memcpy (from, + fragments_to_loopback + (len - + VLIB_FRAME_SIZE), + sizeof (u32) * VLIB_FRAME_SIZE); + n_left_from = VLIB_FRAME_SIZE; + _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE; + } + } + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_node_increment_counter (vm, nat64_in2out_reass_node.index, + NAT64_IN2OUT_ERROR_IN2OUT_PACKETS, + pkts_processed); + + nat_send_all_to_node (vm, fragments_to_drop, node, + &node->errors[NAT64_IN2OUT_ERROR_DROP_FRAGMENT], + NAT64_IN2OUT_NEXT_DROP); + + vec_free (fragments_to_drop); + vec_free (fragments_to_loopback); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat64_in2out_reass_node) = { + .function = nat64_in2out_reass_node_fn, + .name = "nat64-in2out-reass", + .vector_size = sizeof (u32), + .format_trace = format_nat64_in2out_reass_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (nat64_in2out_error_strings), + .error_strings = nat64_in2out_error_strings, + .n_next_nodes = NAT64_IN2OUT_N_NEXT, + /* edit / add dispositions here */ + .next_nodes = { + [NAT64_IN2OUT_NEXT_DROP] = "error-drop", + [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup", + [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup", + [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath", + [NAT64_IN2OUT_NEXT_REASS] = "nat64-in2out-reass", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (nat64_in2out_reass_node, + nat64_in2out_reass_node_fn); + +typedef struct +{ + u32 next_worker_index; + u8 do_handoff; +} nat64_in2out_handoff_trace_t; + +static u8 * +format_nat64_in2out_handoff_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + nat64_in2out_handoff_trace_t *t = + va_arg (*args, nat64_in2out_handoff_trace_t *); + char *m; + + m = t->do_handoff ? "next worker" : "same worker"; + s = format (s, "NAT64-IN2OUT-HANDOFF: %s %d", m, t->next_worker_index); + + return s; +} + +static inline uword +nat64_in2out_handoff_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + nat64_main_t *nm = &nat64_main; + vlib_thread_main_t *tm = vlib_get_thread_main (); + u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0; + static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index; + static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index + = 0; + vlib_frame_queue_elt_t *hf = 0; + vlib_frame_queue_t *fq; + vlib_frame_t *f = 0, *d = 0; + int i; + u32 n_left_to_next_worker = 0, *to_next_worker = 0; + u32 next_worker_index = 0; + u32 current_worker_index = ~0; + u32 thread_index = vm->thread_index; + u32 fq_index; + u32 to_node_index; + + fq_index = nm->fq_in2out_index; + to_node_index = nat64_in2out_node.index; + + if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0)) + { + vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1); + + vec_validate_init_empty (congested_handoff_queue_by_worker_index, + tm->n_vlib_mains - 1, + (vlib_frame_queue_t *) (~0)); + } + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + + while (n_left_from > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip6_header_t *ip0; + u8 do_handoff; + + bi0 = from[0]; + from += 1; + n_left_from -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + ip0 = vlib_buffer_get_current (b0); + + next_worker_index = nat64_get_worker_in2out (&ip0->src_address); + + if (PREDICT_FALSE (next_worker_index != thread_index)) + { + do_handoff = 1; + + if (next_worker_index != current_worker_index) + { + fq = + is_vlib_frame_queue_congested (fq_index, next_worker_index, + 30, + congested_handoff_queue_by_worker_index); + + if (fq) + { + /* if this is 1st frame */ + if (!d) + { + d = vlib_get_frame_to_node (vm, nm->error_node_index); + to_next_drop = vlib_frame_vector_args (d); + } + + to_next_drop[0] = bi0; + to_next_drop += 1; + d->n_vectors++; + goto trace0; + } + + if (hf) + hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; + + hf = + vlib_get_worker_handoff_queue_elt (fq_index, + next_worker_index, + handoff_queue_elt_by_worker_index); + n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors; + to_next_worker = &hf->buffer_index[hf->n_vectors]; + current_worker_index = next_worker_index; + } + + ASSERT (to_next_worker != 0); + + /* enqueue to correct worker thread */ + to_next_worker[0] = bi0; + to_next_worker++; + n_left_to_next_worker--; + + if (n_left_to_next_worker == 0) + { + hf->n_vectors = VLIB_FRAME_SIZE; + vlib_put_frame_queue_elt (hf); + current_worker_index = ~0; + handoff_queue_elt_by_worker_index[next_worker_index] = 0; + hf = 0; + } + } + else + { + do_handoff = 0; + /* if this is 1st frame */ + if (!f) + { + f = vlib_get_frame_to_node (vm, to_node_index); + to_next = vlib_frame_vector_args (f); + } + + to_next[0] = bi0; + to_next += 1; + f->n_vectors++; + } + + trace0: + if (PREDICT_FALSE + ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat64_in2out_handoff_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_worker_index = next_worker_index; + t->do_handoff = do_handoff; + } + } + + if (f) + vlib_put_frame_to_node (vm, to_node_index, f); + + if (d) + vlib_put_frame_to_node (vm, nm->error_node_index, d); + + if (hf) + hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; + + /* Ship frames to the worker nodes */ + for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++) + { + if (handoff_queue_elt_by_worker_index[i]) + { + hf = handoff_queue_elt_by_worker_index[i]; + /* + * It works better to let the handoff node + * rate-adapt, always ship the handoff queue element. + */ + if (1 || hf->n_vectors == hf->last_n_vectors) + { + vlib_put_frame_queue_elt (hf); + handoff_queue_elt_by_worker_index[i] = 0; + } + else + hf->last_n_vectors = hf->n_vectors; + } + congested_handoff_queue_by_worker_index[i] = + (vlib_frame_queue_t *) (~0); + } + hf = 0; + current_worker_index = ~0; + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat64_in2out_handoff_node) = { + .function = nat64_in2out_handoff_node_fn, + .name = "nat64-in2out-handoff", + .vector_size = sizeof (u32), + .format_trace = format_nat64_in2out_handoff_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_next_nodes = 1, + + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (nat64_in2out_handoff_node, + nat64_in2out_handoff_node_fn); + /* * fd.io coding-style-patch-verification: ON *