X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fnat_inlines.h;h=67411750c95d9f6a6daa956e718124c581942778;hb=cf9bb22a9483b97b00b7dcacc35b37ae0fcaefbe;hp=d37cb10b6fda84e4f0e9191c83ca0a388be87030;hpb=a3a830484fa6b6487f7f3d991a52cb6b090a8be8;p=vpp.git diff --git a/src/plugins/nat/nat_inlines.h b/src/plugins/nat/nat_inlines.h index d37cb10b6fd..67411750c95 100644 --- a/src/plugins/nat/nat_inlines.h +++ b/src/plugins/nat/nat_inlines.h @@ -23,6 +23,83 @@ #include #include +always_inline u64 +calc_nat_key (ip4_address_t addr, u16 port, u32 fib_index, u8 proto) +{ + ASSERT (fib_index <= (1 << 14) - 1); + ASSERT (proto <= (1 << 3) - 1); + return (u64) addr.as_u32 << 32 | (u64) port << 16 | fib_index << 3 | + (proto & 0x7); +} + +always_inline void +split_nat_key (u64 key, ip4_address_t * addr, u16 * port, + u32 * fib_index, nat_protocol_t * proto) +{ + if (addr) + { + addr->as_u32 = key >> 32; + } + if (port) + { + *port = (key >> 16) & (u16) ~ 0; + } + if (fib_index) + { + *fib_index = key >> 3 & ((1 << 13) - 1); + } + if (proto) + { + *proto = key & 0x7; + } +} + +always_inline void +init_nat_k (clib_bihash_kv_8_8_t * kv, ip4_address_t addr, u16 port, + u32 fib_index, nat_protocol_t proto) +{ + kv->key = calc_nat_key (addr, port, fib_index, proto); + kv->value = ~0ULL; +} + +always_inline void +init_nat_kv (clib_bihash_kv_8_8_t * kv, ip4_address_t addr, u16 port, + u32 fib_index, nat_protocol_t proto, u64 value) +{ + init_nat_k (kv, addr, port, fib_index, proto); + kv->value = value; +} + +always_inline void +init_nat_i2o_k (clib_bihash_kv_8_8_t * kv, snat_session_t * s) +{ + return init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index, + s->nat_proto); +} + +always_inline void +init_nat_i2o_kv (clib_bihash_kv_8_8_t * kv, snat_session_t * s, u64 value) +{ + init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index, + s->nat_proto); + kv->value = value; +} + +always_inline void +init_nat_o2i_k (clib_bihash_kv_8_8_t * kv, snat_session_t * s) +{ + return init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index, + s->nat_proto); +} + +always_inline void +init_nat_o2i_kv (clib_bihash_kv_8_8_t * kv, snat_session_t * s, u64 value) +{ + init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index, + s->nat_proto); + kv->value = value; +} + static inline uword nat_pre_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -58,8 +135,8 @@ nat_pre_node_fn_inline (vlib_main_t * vm, vlib_prefetch_buffer_header (p2, LOAD); vlib_prefetch_buffer_header (p3, LOAD); - CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD); } /* speculatively enqueue b0 and b1 to the current next frame */ @@ -175,7 +252,7 @@ always_inline u8 maximum_sessions_exceeded (snat_main_t * sm, u32 thread_index) { if (pool_elts (sm->per_thread_data[thread_index].sessions) >= - sm->max_translations) + sm->max_translations_per_thread) return 1; return 0; @@ -384,7 +461,7 @@ nat44_set_tcp_session_state_o2i (snat_main_t * sm, f64 now, always_inline u32 nat44_session_get_timeout (snat_main_t * sm, snat_session_t * s) { - switch (s->in2out.protocol) + switch (s->nat_proto) { case NAT_PROTOCOL_ICMP: return sm->icmp_timeout; @@ -412,7 +489,7 @@ nat44_session_update_counters (snat_session_t * s, f64 now, uword bytes, s->total_pkts++; s->total_bytes += bytes; nat_ha_sref (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, - s->ext_host_port, s->out2in.protocol, s->out2in.fib_index, + s->ext_host_port, s->nat_proto, s->out2in.fib_index, s->total_pkts, s->total_bytes, thread_index, &s->ha_last_refreshed, now); } @@ -444,14 +521,47 @@ nat44_session_update_lru (snat_main_t * sm, snat_session_t * s, } always_inline void -make_ed_kv (ip4_address_t * l_addr, ip4_address_t * r_addr, u8 proto, - u32 fib_index, u16 l_port, u16 r_port, u64 value, - clib_bihash_kv_16_8_t * kv) +init_ed_k (clib_bihash_kv_16_8_t * kv, ip4_address_t l_addr, u16 l_port, + ip4_address_t r_addr, u16 r_port, u32 fib_index, u8 proto) { - kv->key[0] = (u64) r_addr->as_u32 << 32 | l_addr->as_u32; + kv->key[0] = (u64) r_addr.as_u32 << 32 | l_addr.as_u32; kv->key[1] = (u64) r_port << 48 | (u64) l_port << 32 | fib_index << 8 | proto; - kv->value = value; +} + +always_inline void +init_ed_kv (clib_bihash_kv_16_8_t * kv, ip4_address_t l_addr, u16 l_port, + ip4_address_t r_addr, u16 r_port, u32 fib_index, u8 proto, + u32 thread_index, u32 session_index) +{ + init_ed_k (kv, l_addr, l_port, r_addr, r_port, fib_index, proto); + kv->value = (u64) thread_index << 32 | session_index; +} + +always_inline u32 +ed_value_get_thread_index (clib_bihash_kv_16_8_t * value) +{ + return value->value >> 32; +} + +always_inline u32 +ed_value_get_session_index (clib_bihash_kv_16_8_t * value) +{ + return value->value & ~(u32) 0; +} + +always_inline void +split_ed_value (clib_bihash_kv_16_8_t * value, u32 * thread_index, + u32 * session_index) +{ + if (thread_index) + { + *thread_index = ed_value_get_thread_index (value); + } + if (session_index) + { + *session_index = ed_value_get_session_index (value); + } } always_inline void @@ -485,19 +595,10 @@ split_ed_kv (clib_bihash_kv_16_8_t * kv, } } -always_inline void -make_sm_kv (clib_bihash_kv_8_8_t * kv, ip4_address_t * addr, u8 proto, - u32 fib_index, u16 port) -{ - kv->key = (u64) fib_index << 51 | (u64) proto << 48 | (u64) port << 32 | - addr->as_u32; - - kv->value = ~0ULL; -} - static_always_inline int get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, - u64 value, u8 * nat_proto, u16 * l_port, u16 * r_port, + u32 thread_index, u32 session_index, + nat_protocol_t * nat_proto, u16 * l_port, u16 * r_port, clib_bihash_kv_16_8_t * kv) { u8 proto; @@ -519,7 +620,7 @@ get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, proto = IP_PROTOCOL_ICMP; l_addr = &ip0->src_address; r_addr = &ip0->dst_address; - _l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst? + _l_port = vnet_buffer (b)->ip.reass.l4_src_port; _r_port = 0; } else @@ -546,8 +647,8 @@ get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, return NAT_IN2OUT_ED_ERROR_UNSUPPORTED_PROTOCOL; } } - make_ed_kv (l_addr, r_addr, proto, rx_fib_index, _l_port, _r_port, value, - kv); + init_ed_kv (kv, *l_addr, _l_port, *r_addr, _r_port, rx_fib_index, proto, + thread_index, session_index); if (nat_proto) { *nat_proto = ip_proto_to_nat_proto (proto); @@ -563,10 +664,10 @@ get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, return 0; } - static_always_inline int get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, - u64 value, u8 * nat_proto, u16 * l_port, u16 * r_port, + u32 thread_index, u32 session_index, + nat_protocol_t * nat_proto, u16 * l_port, u16 * r_port, clib_bihash_kv_16_8_t * kv) { icmp46_header_t *icmp0; @@ -587,7 +688,7 @@ get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, proto = IP_PROTOCOL_ICMP; l_addr = &ip0->dst_address; r_addr = &ip0->src_address; - _l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst? + _l_port = vnet_buffer (b)->ip.reass.l4_src_port; _r_port = 0; } else @@ -614,8 +715,8 @@ get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, return -1; } } - make_ed_kv (l_addr, r_addr, proto, rx_fib_index, _l_port, _r_port, value, - kv); + init_ed_kv (kv, *l_addr, _l_port, *r_addr, _r_port, rx_fib_index, proto, + thread_index, session_index); if (nat_proto) { *nat_proto = ip_proto_to_nat_proto (proto); @@ -631,54 +732,6 @@ get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index, return 0; } -always_inline void -mss_clamping (snat_main_t * sm, tcp_header_t * tcp, ip_csum_t * sum) -{ - u8 *data; - u8 opt_len, opts_len, kind; - u16 mss; - - if (!(sm->mss_clamping && tcp_syn (tcp))) - return; - - opts_len = (tcp_doff (tcp) << 2) - sizeof (tcp_header_t); - data = (u8 *) (tcp + 1); - for (; opts_len > 0; opts_len -= opt_len, data += opt_len) - { - kind = data[0]; - - if (kind == TCP_OPTION_EOL) - break; - else if (kind == TCP_OPTION_NOOP) - { - opt_len = 1; - continue; - } - else - { - if (opts_len < 2) - return; - opt_len = data[1]; - - if (opt_len < 2 || opt_len > opts_len) - return; - } - - if (kind == TCP_OPTION_MSS) - { - mss = *(u16 *) (data + 2); - if (clib_net_to_host_u16 (mss) > sm->mss_clamping) - { - *sum = - ip_csum_update (*sum, mss, sm->mss_value_net, ip4_header_t, - length); - clib_memcpy_fast (data + 2, &sm->mss_value_net, 2); - } - return; - } - } -} - /** * @brief Check if packet should be translated * @@ -760,6 +813,21 @@ increment_v4_address (ip4_address_t * a) a->as_u32 = clib_host_to_net_u32 (v); } +static_always_inline u16 +snat_random_port (u16 min, u16 max) +{ + snat_main_t *sm = &snat_main; + u32 rwide; + u16 r; + + rwide = random_u32 (&sm->random_seed); + r = rwide & 0xFFFF; + if (r >= min && r <= max) + return r; + + return min + (rwide % (max - min + 1)); +} + #endif /* __included_nat_inlines_h__ */ /*