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Diffstat (limited to 'vnet/vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.c')
-rw-r--r--vnet/vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.c562
1 files changed, 562 insertions, 0 deletions
diff --git a/vnet/vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.c b/vnet/vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.c
new file mode 100644
index 00000000000..8cc46d3d3eb
--- /dev/null
+++ b/vnet/vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.c
@@ -0,0 +1,562 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vnet/nsh-vxlan-gpe/nsh_vxlan_gpe.h>
+
+nsh_vxlan_gpe_main_t nsh_vxlan_gpe_main;
+
+static u8 * format_decap_next (u8 * s, va_list * args)
+{
+ u32 next_index = va_arg (*args, u32);
+
+ switch (next_index)
+ {
+ case NSH_VXLAN_GPE_INPUT_NEXT_DROP:
+ return format (s, "drop");
+ case NSH_VXLAN_GPE_INPUT_NEXT_IP4_INPUT:
+ return format (s, "ip4");
+ case NSH_VXLAN_GPE_INPUT_NEXT_IP6_INPUT:
+ return format (s, "ip6");
+ case NSH_VXLAN_GPE_INPUT_NEXT_NSH_VXLAN_GPE_ENCAP:
+ return format (s, "nsh-vxlan-gpe");
+ default:
+ return format (s, "unknown %d", next_index);
+ }
+ return s;
+}
+
+u8 * format_nsh_vxlan_gpe_tunnel (u8 * s, va_list * args)
+{
+ nsh_vxlan_gpe_tunnel_t * t = va_arg (*args, nsh_vxlan_gpe_tunnel_t *);
+ nsh_vxlan_gpe_main_t * ngm = &nsh_vxlan_gpe_main;
+
+ s = format (s,
+ "[%d] %U (src) %U (dst) fibs: encap %d, decap %d",
+ t - ngm->tunnels,
+ format_ip4_address, &t->src,
+ format_ip4_address, &t->dst,
+ t->encap_fib_index,
+ t->decap_fib_index);
+ s = format (s, " decap next %U\n", format_decap_next, t->decap_next_index);
+ s = format (s, " vxlan VNI %d ", t->vni);
+ s = format (s, "nsh ver %d ", (t->ver_o_c>>6));
+ if (t->ver_o_c & NSH_GRE_O_BIT)
+ s = format (s, "O-set ");
+
+ if (t->ver_o_c & NSH_GRE_C_BIT)
+ s = format (s, "C-set ");
+
+ s = format (s, "len %d (%d bytes) md_type %d next_protocol %d\n",
+ t->length, t->length * 4, t->md_type, t->next_protocol);
+
+ s = format (s, " service path %d service index %d\n",
+ (t->spi_si>>NSH_GRE_SPI_SHIFT) & NSH_GRE_SPI_MASK,
+ t->spi_si & NSH_GRE_SINDEX_MASK);
+
+ s = format (s, " c1 %d c2 %d c3 %d c4 %d\n",
+ t->c1, t->c2, t->c3, t->c4);
+
+ return s;
+}
+
+static u8 * format_nsh_vxlan_gpe_name (u8 * s, va_list * args)
+{
+ nsh_vxlan_gpe_main_t * ngm = &nsh_vxlan_gpe_main;
+ u32 i = va_arg (*args, u32);
+ u32 show_dev_instance = ~0;
+
+ if (i < vec_len (ngm->dev_inst_by_real))
+ show_dev_instance = ngm->dev_inst_by_real[i];
+
+ if (show_dev_instance != ~0)
+ i = show_dev_instance;
+
+ return format (s, "nsh_vxlan_gpe_tunnel%d", i);
+}
+
+static int nsh_vxlan_gpe_name_renumber (vnet_hw_interface_t * hi,
+ u32 new_dev_instance)
+{
+ nsh_vxlan_gpe_main_t * ngm = &nsh_vxlan_gpe_main;
+
+ vec_validate_init_empty (ngm->dev_inst_by_real, hi->dev_instance, ~0);
+
+ ngm->dev_inst_by_real [hi->dev_instance] = new_dev_instance;
+
+ return 0;
+}
+
+static uword dummy_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ clib_warning ("you shouldn't be here, leaking buffers...");
+ return frame->n_vectors;
+}
+
+VNET_DEVICE_CLASS (nsh_vxlan_gpe_device_class,static) = {
+ .name = "NSH_VXLAN_GPE",
+ .format_device_name = format_nsh_vxlan_gpe_name,
+ .format_tx_trace = format_nsh_vxlan_gpe_encap_trace,
+ .tx_function = dummy_interface_tx,
+ .name_renumber = nsh_vxlan_gpe_name_renumber,
+};
+
+static uword dummy_set_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 l3_type,
+ void * dst_address,
+ void * rewrite,
+ uword max_rewrite_bytes)
+{
+ return 0;
+}
+
+static u8 * format_nsh_vxlan_gpe_header_with_length (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ s = format (s, "unimplemented dev %u", dev_instance);
+ return s;
+}
+
+VNET_HW_INTERFACE_CLASS (nsh_vxlan_gpe_hw_class) = {
+ .name = "NSH_VXLAN_GPE",
+ .format_header = format_nsh_vxlan_gpe_header_with_length,
+ .set_rewrite = dummy_set_rewrite,
+};
+
+#define foreach_copy_field \
+_(src.as_u32) \
+_(dst.as_u32) \
+_(vni) \
+_(encap_fib_index) \
+_(decap_fib_index) \
+_(decap_next_index) \
+_(ver_o_c) \
+_(length) \
+_(md_type) \
+_(next_protocol) \
+_(spi_si) \
+_(c1) \
+_(c2) \
+_(c3) \
+_(c4) \
+_(tlvs)
+
+#define foreach_32bit_field \
+_(spi_si) \
+_(c1) \
+_(c2) \
+_(c3) \
+_(c4)
+
+static int nsh_vxlan_gpe_rewrite (nsh_vxlan_gpe_tunnel_t * t)
+{
+ u8 *rw = 0;
+ ip4_header_t * ip0;
+ nsh_header_t * nsh0;
+ ip4_vxlan_gpe_and_nsh_header_t * h0;
+ int len;
+
+ len = sizeof (*h0) + vec_len(t->tlvs)*4;
+
+ vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+ h0 = (ip4_vxlan_gpe_and_nsh_header_t *) rw;
+
+ /* Fixed portion of the (outer) ip4 header */
+ ip0 = &h0->ip4;
+ ip0->ip_version_and_header_length = 0x45;
+ ip0->ttl = 254;
+ ip0->protocol = IP_PROTOCOL_UDP;
+
+ /* we fix up the ip4 header length and checksum after-the-fact */
+ ip0->src_address.as_u32 = t->src.as_u32;
+ ip0->dst_address.as_u32 = t->dst.as_u32;
+ ip0->checksum = ip4_header_checksum (ip0);
+
+ /* UDP header, randomize src port on something, maybe? */
+ h0->udp.src_port = clib_host_to_net_u16 (4790);
+ h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
+
+ /* VXLAN header. Are we having fun yet? */
+ h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
+ h0->vxlan.ver_res = VXLAN_GPE_VERSION;
+ h0->vxlan.next_protocol = VXLAN_NEXT_PROTOCOL_NSH;
+ h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
+
+ /* NSH header */
+ nsh0 = &h0->nsh;
+ nsh0->ver_o_c = t->ver_o_c;
+ nsh0->md_type = t->md_type;
+ nsh0->next_protocol = t->next_protocol;
+ nsh0->spi_si = t->spi_si;
+ nsh0->c1 = t->c1;
+ nsh0->c2 = t->c2;
+ nsh0->c3 = t->c3;
+ nsh0->c4 = t->c4;
+
+ /* Endian swap 32-bit fields */
+#define _(x) nsh0->x = clib_host_to_net_u32(nsh0->x);
+ foreach_32bit_field;
+#undef _
+
+ /* fix nsh header length */
+ t->length = 6 + vec_len(t->tlvs);
+ nsh0->length = t->length;
+
+ /* Copy any TLVs */
+ if (vec_len(t->tlvs))
+ memcpy (nsh0->tlvs, t->tlvs, 4*vec_len(t->tlvs));
+
+ t->rewrite = rw;
+ return (0);
+}
+
+int vnet_nsh_vxlan_gpe_add_del_tunnel
+(vnet_nsh_vxlan_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
+{
+ nsh_vxlan_gpe_main_t * ngm = &nsh_vxlan_gpe_main;
+ nsh_vxlan_gpe_tunnel_t *t = 0;
+ vnet_main_t * vnm = ngm->vnet_main;
+ vnet_hw_interface_t * hi;
+ uword * p;
+ u32 hw_if_index = ~0;
+ u32 sw_if_index = ~0;
+ int rv;
+ nsh_vxlan_gpe_tunnel_key_t key, *key_copy;
+ hash_pair_t *hp;
+
+ key.src = a->dst.as_u32; /* decap src in key is encap dst in config */
+ key.vni = clib_host_to_net_u32 (a->vni << 8);
+ key.spi_si = clib_host_to_net_u32(a->spi_si);
+
+ p = hash_get_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &key);
+
+ if (a->is_add)
+ {
+ /* adding a tunnel: tunnel must not already exist */
+ if (p)
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ if (a->decap_next_index >= NSH_VXLAN_GPE_INPUT_N_NEXT)
+ return VNET_API_ERROR_INVALID_DECAP_NEXT;
+
+ pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ memset (t, 0, sizeof (*t));
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_copy_field;
+#undef _
+
+ rv = nsh_vxlan_gpe_rewrite (t);
+
+ if (rv)
+ {
+ pool_put (ngm->tunnels, t);
+ return rv;
+ }
+
+ key_copy = clib_mem_alloc (sizeof (*key_copy));
+ memcpy (key_copy, &key, sizeof (*key_copy));
+
+ hash_set_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, key_copy,
+ t - ngm->tunnels);
+
+ if (vec_len (ngm->free_nsh_vxlan_gpe_tunnel_hw_if_indices) > 0)
+ {
+ hw_if_index = ngm->free_nsh_vxlan_gpe_tunnel_hw_if_indices
+ [vec_len (ngm->free_nsh_vxlan_gpe_tunnel_hw_if_indices)-1];
+ _vec_len (ngm->free_nsh_vxlan_gpe_tunnel_hw_if_indices) -= 1;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->dev_instance = t - ngm->tunnels;
+ hi->hw_instance = hi->dev_instance;
+ }
+ else
+ {
+ hw_if_index = vnet_register_interface
+ (vnm, nsh_vxlan_gpe_device_class.index, t - ngm->tunnels,
+ nsh_vxlan_gpe_hw_class.index, t - ngm->tunnels);
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->output_node_index = nsh_vxlan_gpe_encap_node.index;
+ }
+
+ t->hw_if_index = hw_if_index;
+ t->sw_if_index = sw_if_index = hi->sw_if_index;
+
+ vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
+ VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+ }
+ else
+ {
+ /* deleting a tunnel: tunnel must exist */
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ t = pool_elt_at_index (ngm->tunnels, p[0]);
+
+ vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
+ vec_add1 (ngm->free_nsh_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index);
+
+ hp = hash_get_pair (ngm->nsh_vxlan_gpe_tunnel_by_key, &key);
+ key_copy = (void *)(hp->key);
+ hash_unset_mem (ngm->nsh_vxlan_gpe_tunnel_by_key, &key);
+ clib_mem_free (key_copy);
+
+ vec_free (t->rewrite);
+ pool_put (ngm->tunnels, t);
+ }
+
+ if (sw_if_indexp)
+ *sw_if_indexp = sw_if_index;
+
+ return 0;
+}
+
+static u32 fib_index_from_fib_id (u32 fib_id)
+{
+ ip4_main_t * im = &ip4_main;
+ uword * p;
+
+ p = hash_get (im->fib_index_by_table_id, fib_id);
+ if (!p)
+ return ~0;
+
+ return p[0];
+}
+
+static uword unformat_decap_next (unformat_input_t * input, va_list * args)
+{
+ u32 * result = va_arg (*args, u32 *);
+ u32 tmp;
+
+ if (unformat (input, "drop"))
+ *result = NSH_VXLAN_GPE_INPUT_NEXT_DROP;
+ else if (unformat (input, "ip4"))
+ *result = NSH_VXLAN_GPE_INPUT_NEXT_IP4_INPUT;
+ else if (unformat (input, "ip6"))
+ *result = NSH_VXLAN_GPE_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, "ethernet"))
+ *result = NSH_VXLAN_GPE_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, "nsh-vxlan-gpe"))
+ *result = NSH_VXLAN_GPE_INPUT_NEXT_NSH_VXLAN_GPE_ENCAP;
+ else if (unformat (input, "%d", &tmp))
+ *result = tmp;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+nsh_vxlan_gpe_add_del_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, * line_input = &_line_input;
+ ip4_address_t src, dst;
+ u8 is_add = 1;
+ u8 src_set = 0;
+ u8 dst_set = 0;
+ u32 encap_fib_index = 0;
+ u32 decap_fib_index = 0;
+ u8 ver_o_c = 0;
+ u8 length = 0;
+ u8 md_type = 0;
+ u8 next_protocol = 1; /* default: ip4 */
+ u32 decap_next_index = NSH_VXLAN_GPE_INPUT_NEXT_IP4_INPUT;
+ u32 spi;
+ u8 spi_set = 0;
+ u32 si;
+ u32 vni;
+ u8 vni_set = 0;
+ u8 si_set = 0;
+ u32 spi_si;
+ u32 c1 = 0;
+ u32 c2 = 0;
+ u32 c3 = 0;
+ u32 c4 = 0;
+ u32 *tlvs = 0;
+ u32 tmp;
+ int rv;
+ vnet_nsh_vxlan_gpe_add_del_tunnel_args_t _a, * a = &_a;
+
+ /* Get a line of input. */
+ if (! unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (line_input, "del"))
+ is_add = 0;
+ else if (unformat (line_input, "src %U",
+ unformat_ip4_address, &src))
+ src_set = 1;
+ else if (unformat (line_input, "dst %U",
+ unformat_ip4_address, &dst))
+ dst_set = 1;
+ else if (unformat (line_input, "encap-vrf-id %d", &tmp))
+ {
+ encap_fib_index = fib_index_from_fib_id (tmp);
+ if (encap_fib_index == ~0)
+ return clib_error_return (0, "nonexistent encap fib id %d", tmp);
+ }
+ else if (unformat (line_input, "decap-vrf-id %d", &tmp))
+ {
+ decap_fib_index = fib_index_from_fib_id (tmp);
+ if (decap_fib_index == ~0)
+ return clib_error_return (0, "nonexistent decap fib id %d", tmp);
+ }
+ else if (unformat (line_input, "decap-next %U", unformat_decap_next,
+ &decap_next_index))
+ ;
+ else if (unformat (line_input, "vni %d", &vni))
+ vni_set = 1;
+ else if (unformat (line_input, "version %d", &tmp))
+ ver_o_c |= (tmp & 3) << 6;
+ else if (unformat (line_input, "o-bit %d", &tmp))
+ ver_o_c |= (tmp & 1) << 5;
+ else if (unformat (line_input, "c-bit %d", &tmp))
+ ver_o_c |= (tmp & 1) << 4;
+ else if (unformat (line_input, "md-type %d", &tmp))
+ md_type = tmp;
+ else if (unformat(line_input, "next-ip4"))
+ next_protocol = 1;
+ else if (unformat(line_input, "next-ip6"))
+ next_protocol = 2;
+ else if (unformat(line_input, "next-ethernet"))
+ next_protocol = 3;
+ else if (unformat(line_input, "next-nsh"))
+ next_protocol = 4;
+ else if (unformat (line_input, "c1 %d", &c1))
+ ;
+ else if (unformat (line_input, "c2 %d", &c2))
+ ;
+ else if (unformat (line_input, "c3 %d", &c3))
+ ;
+ else if (unformat (line_input, "c4 %d", &c4))
+ ;
+ else if (unformat (line_input, "spi %d", &spi))
+ spi_set = 1;
+ else if (unformat (line_input, "si %d", &si))
+ si_set = 1;
+ else if (unformat (line_input, "tlv %x"))
+ vec_add1 (tlvs, tmp);
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+ if (src_set == 0)
+ return clib_error_return (0, "tunnel src address not specified");
+
+ if (dst_set == 0)
+ return clib_error_return (0, "tunnel dst address not specified");
+
+ if (vni_set == 0)
+ return clib_error_return (0, "vni not specified");
+
+ if (spi_set == 0)
+ return clib_error_return (0, "spi not specified");
+
+ if (si_set == 0)
+ return clib_error_return (0, "si not specified");
+
+ spi_si = (spi<<8) | si;
+
+ memset (a, 0, sizeof (*a));
+
+ a->is_add = is_add;
+
+#define _(x) a->x = x;
+ foreach_copy_field;
+#undef _
+
+ rv = vnet_nsh_vxlan_gpe_add_del_tunnel (a, 0 /* hw_if_indexp */);
+
+ switch(rv)
+ {
+ case 0:
+ break;
+ case VNET_API_ERROR_INVALID_DECAP_NEXT:
+ return clib_error_return (0, "invalid decap-next...");
+
+ case VNET_API_ERROR_TUNNEL_EXIST:
+ return clib_error_return (0, "tunnel already exists...");
+
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "tunnel does not exist...");
+
+ default:
+ return clib_error_return
+ (0, "vnet_nsh_vxlan_gpe_add_del_tunnel returned %d", rv);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (create_nsh_vxlan_gpe_tunnel_command, static) = {
+ .path = "nsh vxlan tunnel",
+ .short_help =
+ "nsh vxlan tunnel src <ip4-addr> dst <ip4-addr>"
+ " c1 <nn> c2 <nn> c3 <nn> c4 <nn> spi <nn> si <nn> vni <nn>\n"
+ " [encap-fib-id <nn>] [decap-fib-id <nn>] [o-bit <1|0>] [c-bit <1|0>]\n"
+ " [md-type <nn>][next-ip4][next-ip6][next-ethernet][next-nsh]\n"
+ " [tlv <xx>][decap-next [ip4|ip6|ethernet|nsh-encap]][del]\n",
+ .function = nsh_vxlan_gpe_add_del_tunnel_command_fn,
+};
+
+static clib_error_t *
+show_nsh_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ nsh_vxlan_gpe_main_t * ngm = &nsh_vxlan_gpe_main;
+ nsh_vxlan_gpe_tunnel_t * t;
+
+ if (pool_elts (ngm->tunnels) == 0)
+ vlib_cli_output (vm, "No nsh-vxlan-gpe tunnels configured...");
+
+ pool_foreach (t, ngm->tunnels,
+ ({
+ vlib_cli_output (vm, "%U", format_nsh_vxlan_gpe_tunnel, t);
+ }));
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_nsh_vxlan_gpe_tunnel_command, static) = {
+ .path = "show nsh vxlan tunnel",
+ .function = show_nsh_vxlan_gpe_tunnel_command_fn,
+};
+
+clib_error_t *nsh_vxlan_gpe_init (vlib_main_t *vm)
+{
+ nsh_vxlan_gpe_main_t *ngm = &nsh_vxlan_gpe_main;
+
+ ngm->vnet_main = vnet_get_main();
+ ngm->vlib_main = vm;
+
+ ngm->nsh_vxlan_gpe_tunnel_by_key
+ = hash_create_mem (0, sizeof(nsh_vxlan_gpe_tunnel_key_t), sizeof (uword));
+
+ udp_register_dst_port (vm, UDP_DST_PORT_vxlan_gpe,
+ nsh_vxlan_gpe_input_node.index, 1 /* is_ip4 */);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION(nsh_vxlan_gpe_init);
+