diff options
Diffstat (limited to 'src/vnet/cdp/cdp_periodic.c')
| -rw-r--r-- | src/vnet/cdp/cdp_periodic.c | 515 |
1 files changed, 0 insertions, 515 deletions
diff --git a/src/vnet/cdp/cdp_periodic.c b/src/vnet/cdp/cdp_periodic.c deleted file mode 100644 index 8899c49ce9c..00000000000 --- a/src/vnet/cdp/cdp_periodic.c +++ /dev/null @@ -1,515 +0,0 @@ -/* - * Copyright (c) 2011-2016 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/cdp/cdp_node.h> -#include <vppinfra/hash.h> -#include <vnet/unix/pcap.h> -#include <vnet/srp/srp.h> -#include <vnet/ppp/ppp.h> -#include <vnet/hdlc/hdlc.h> -#include <vnet/srp/packet.h> - -/* - * Generate a set of specific CDP TLVs. - * - * $$$ eventually these need to fish better data from - * other data structures; e.g. the hostname, software version info - * etc. - */ - -static void -add_device_name_tlv (vnet_hw_interface_t * hw, u8 ** t0p) -{ - cdp_tlv_t *t = (cdp_tlv_t *) * t0p; - - t->t = htons (CDP_TLV_device_name); - t->l = htons (3 + sizeof (*t)); - clib_memcpy (&t->v, "VPP", 3); - - *t0p += ntohs (t->l); -} - -static void -add_port_id_tlv (vnet_hw_interface_t * hw, u8 ** t0p) -{ - cdp_tlv_t *t = (cdp_tlv_t *) * t0p; - - t->t = htons (CDP_TLV_port_id); - t->l = htons (vec_len (hw->name) + sizeof (*t)); - clib_memcpy (&t->v, hw->name, vec_len (hw->name)); - *t0p += ntohs (t->l); -} - -static void -add_version_tlv (vnet_hw_interface_t * hw, u8 ** t0p) -{ - cdp_tlv_t *t = (cdp_tlv_t *) * t0p; - - t->t = htons (CDP_TLV_version); - t->l = htons (12 + sizeof (*t)); - clib_memcpy (&t->v, "VPP Software", 12); - *t0p += ntohs (t->l); -} - -static void -add_platform_tlv (vnet_hw_interface_t * hw, u8 ** t0p) -{ - cdp_tlv_t *t = (cdp_tlv_t *) * t0p; - - t->t = htons (CDP_TLV_platform); - t->l = htons (2 + sizeof (*t)); - clib_memcpy (&t->v, "SW", 2); - *t0p += ntohs (t->l); -} - -static void -add_capability_tlv (vnet_hw_interface_t * hw, u8 ** t0p) -{ - cdp_tlv_t *t = (cdp_tlv_t *) * t0p; - u32 capabilities; - - t->t = htons (CDP_TLV_capabilities); - t->l = htons (4 + sizeof (*t)); - capabilities = CDP_ROUTER_DEVICE; - capabilities = htonl (capabilities); - clib_memcpy (&t->v, &capabilities, sizeof (capabilities)); - *t0p += ntohs (t->l); -} - -static void -add_tlvs (cdp_main_t * cm, vnet_hw_interface_t * hw, u8 ** t0p) -{ - add_device_name_tlv (hw, t0p); - add_port_id_tlv (hw, t0p); - add_version_tlv (hw, t0p); - add_platform_tlv (hw, t0p); - add_capability_tlv (hw, t0p); -} - -/* - * send a cdp pkt on an ethernet interface - */ -static void -send_ethernet_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count) -{ - u32 *to_next; - ethernet_llc_snap_and_cdp_header_t *h0; - vnet_hw_interface_t *hw; - u32 bi0; - vlib_buffer_t *b0; - u8 *t0; - u16 checksum; - int nbytes_to_checksum; - int i; - vlib_frame_t *f; - vlib_main_t *vm = cm->vlib_main; - vnet_main_t *vnm = cm->vnet_main; - - for (i = 0; i < count; i++) - { - /* - * see cdp_periodic_init() to understand what's already painted - * into the buffer by the packet template mechanism - */ - h0 = vlib_packet_template_get_packet - (vm, &cm->packet_templates[n->packet_template_index], &bi0); - - if (!h0) - break; - - /* Add the interface's ethernet source address */ - hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index); - - clib_memcpy (h0->ethernet.src_address, hw->hw_address, - vec_len (hw->hw_address)); - - t0 = (u8 *) & h0->cdp.data; - - /* add TLVs */ - add_tlvs (cm, hw, &t0); - - /* add the cdp packet checksum */ - nbytes_to_checksum = t0 - (u8 *) & h0->cdp; - checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum); - h0->cdp.checksum = htons (checksum); - - /* Set the outbound packet length */ - b0 = vlib_get_buffer (vm, bi0); - b0->current_length = nbytes_to_checksum + sizeof (*h0) - - sizeof (cdp_hdr_t); - - /* And the outbound interface */ - vnet_buffer (b0)->sw_if_index[VLIB_TX] = hw->sw_if_index; - - /* Set the 802.3 ethernet length */ - h0->ethernet.len = htons (b0->current_length - - sizeof (ethernet_802_3_header_t)); - - /* And output the packet on the correct interface */ - f = vlib_get_frame_to_node (vm, hw->output_node_index); - to_next = vlib_frame_vector_args (f); - to_next[0] = bi0; - f->n_vectors = 1; - - vlib_put_frame_to_node (vm, hw->output_node_index, f); - n->last_sent = vlib_time_now (vm); - } -} - -/* - * send a cdp pkt on an hdlc interface - */ -static void -send_hdlc_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count) -{ - u32 *to_next; - hdlc_and_cdp_header_t *h0; - vnet_hw_interface_t *hw; - u32 bi0; - vlib_buffer_t *b0; - u8 *t0; - u16 checksum; - int nbytes_to_checksum; - int i; - vlib_frame_t *f; - vlib_main_t *vm = cm->vlib_main; - vnet_main_t *vnm = cm->vnet_main; - - for (i = 0; i < count; i++) - { - /* - * see cdp_periodic_init() to understand what's already painted - * into the buffer by the packet template mechanism - */ - h0 = vlib_packet_template_get_packet - (vm, &cm->packet_templates[n->packet_template_index], &bi0); - - hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index); - - t0 = (u8 *) & h0->cdp.data; - - /* add TLVs */ - add_tlvs (cm, hw, &t0); - - /* add the cdp packet checksum */ - nbytes_to_checksum = t0 - (u8 *) & h0->cdp; - checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum); - h0->cdp.checksum = htons (checksum); - - /* Set the outbound packet length */ - b0 = vlib_get_buffer (vm, bi0); - b0->current_length = nbytes_to_checksum + sizeof (*h0) - - sizeof (cdp_hdr_t); - - /* And output the packet on the correct interface */ - f = vlib_get_frame_to_node (vm, hw->output_node_index); - to_next = vlib_frame_vector_args (f); - to_next[0] = bi0; - f->n_vectors = 1; - - vlib_put_frame_to_node (vm, hw->output_node_index, f); - n->last_sent = vlib_time_now (vm); - } -} - -/* - * send a cdp pkt on an srp interface - */ -static void -send_srp_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count) -{ - u32 *to_next; - srp_and_cdp_header_t *h0; - vnet_hw_interface_t *hw; - u32 bi0; - vlib_buffer_t *b0; - u8 *t0; - u16 checksum; - int nbytes_to_checksum; - int i; - vlib_frame_t *f; - vlib_main_t *vm = cm->vlib_main; - vnet_main_t *vnm = cm->vnet_main; - - for (i = 0; i < count; i++) - { - /* - * see cdp_periodic_init() to understand what's already painted - * into the buffer by the packet template mechanism - */ - h0 = vlib_packet_template_get_packet - (vm, &cm->packet_templates[n->packet_template_index], &bi0); - - hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index); - - t0 = (u8 *) & h0->cdp.data; - - /* add TLVs */ - add_tlvs (cm, hw, &t0); - - /* Add the interface's ethernet source address */ - clib_memcpy (h0->ethernet.src_address, hw->hw_address, - vec_len (hw->hw_address)); - - /* add the cdp packet checksum */ - nbytes_to_checksum = t0 - (u8 *) & h0->cdp; - checksum = cdp_checksum (&h0->cdp, nbytes_to_checksum); - h0->cdp.checksum = htons (checksum); - - /* Set the outbound packet length */ - b0 = vlib_get_buffer (vm, bi0); - b0->current_length = nbytes_to_checksum + sizeof (*h0) - - sizeof (cdp_hdr_t); - - /* And output the packet on the correct interface */ - f = vlib_get_frame_to_node (vm, hw->output_node_index); - to_next = vlib_frame_vector_args (f); - to_next[0] = bi0; - f->n_vectors = 1; - - vlib_put_frame_to_node (vm, hw->output_node_index, f); - n->last_sent = vlib_time_now (vm); - } -} - -/* - * Decide which cdp packet template to use - */ -static int -pick_packet_template (cdp_main_t * cm, cdp_neighbor_t * n) -{ - n->packet_template_index = CDP_PACKET_TEMPLATE_ETHERNET; - - return 0; -} - -/* Send a cdp neighbor announcement */ -static void -send_hello (cdp_main_t * cm, cdp_neighbor_t * n, int count) -{ - if (n->packet_template_index == (u8) ~ 0) - { - /* If we don't know how to talk to this peer, don't try again */ - if (pick_packet_template (cm, n)) - { - n->last_sent = 1e70; - return; - } - } - - switch (n->packet_template_index) - { - case CDP_PACKET_TEMPLATE_ETHERNET: - send_ethernet_hello (cm, n, count); - break; - - case CDP_PACKET_TEMPLATE_HDLC: - send_hdlc_hello (cm, n, count); - break; - - case CDP_PACKET_TEMPLATE_SRP: - send_srp_hello (cm, n, count); - break; - - default: - ASSERT (0); - } - n->last_sent = vlib_time_now (cm->vlib_main); -} - -static void -delete_neighbor (cdp_main_t * cm, cdp_neighbor_t * n, int want_broadcast) -{ - hash_unset (cm->neighbor_by_sw_if_index, n->sw_if_index); - vec_free (n->device_name); - vec_free (n->version); - vec_free (n->port_id); - vec_free (n->platform); - vec_free (n->last_rx_pkt); - pool_put (cm->neighbors, n); -} - -void -cdp_periodic (vlib_main_t * vm) -{ - cdp_main_t *cm = &cdp_main; - cdp_neighbor_t *n; - f64 now = vlib_time_now (vm); - vnet_sw_interface_t *sw; - static u32 *delete_list = 0; - int i; - static cdp_neighbor_t **n_list = 0; - - /* *INDENT-OFF* */ - pool_foreach (n, cm->neighbors, - ({ - vec_add1 (n_list, n); - })); - /* *INDENT-ON* */ - - /* Across all cdp neighbors known to the system */ - for (i = 0; i < vec_len (n_list); i++) - { - n = n_list[i]; - - /* "no cdp run" provisioned on the interface? */ - if (n->disabled == 1) - continue; - - sw = vnet_get_sw_interface (cm->vnet_main, n->sw_if_index); - - /* Interface shutdown or rx timeout? */ - if (!(sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) - || (now > (n->last_heard + (f64) n->ttl_in_seconds))) - /* add to list of neighbors to delete */ - vec_add1 (delete_list, n - cm->neighbors); - else if (n->last_sent == 0.0) - /* First time, send 3 hellos */ - send_hello (cm, n, 3 /* three to begin with */ ); - else if (now > (n->last_sent + (((f64) n->ttl_in_seconds) / 6.0))) - /* Normal keepalive, send one */ - send_hello (cm, n, 1 /* one as a keepalive */ ); - } - - for (i = 0; i < vec_len (delete_list); i++) - { - n = vec_elt_at_index (cm->neighbors, delete_list[i]); - delete_neighbor (cm, n, 1); - } - if (delete_list) - _vec_len (delete_list) = 0; - if (n_list) - _vec_len (n_list) = 0; -} - -static clib_error_t * -cdp_periodic_init (vlib_main_t * vm) -{ - cdp_main_t *cm = &cdp_main; - - /* Create the ethernet cdp hello packet template */ - { - ethernet_llc_snap_and_cdp_header_t h; - - memset (&h, 0, sizeof (h)); - - /* Send to 01:00:0c:cc:cc */ - h.ethernet.dst_address[0] = 0x01; - /* h.ethernet.dst_address[1] = 0x00; (memset) */ - h.ethernet.dst_address[2] = 0x0C; - h.ethernet.dst_address[3] = 0xCC; - h.ethernet.dst_address[4] = 0xCC; - h.ethernet.dst_address[5] = 0xCC; - - /* leave src address blank (fill in at send time) */ - - /* leave length blank (fill in at send time) */ - - /* LLC */ - h.llc.dst_sap = h.llc.src_sap = 0xAA; /* SNAP */ - h.llc.control = 0x03; /* UI (no extended control bytes) */ - - /* SNAP */ - /* h.snap.oui[0] = 0x00; (memset) */ - /* h.snap.oui[1] = 0x00; (memset) */ - h.snap.oui[2] = 0x0C; /* Cisco = 0x00000C */ - h.snap.protocol = htons (0x2000); /* CDP = 0x2000 */ - - /* CDP */ - h.cdp.version = 2; - h.cdp.ttl = 180; - - vlib_packet_template_init - (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_ETHERNET], - /* data */ &h, - sizeof (h), - /* alloc chunk size */ 8, - "cdp-ethernet"); - } - -#if 0 /* retain for reference */ - - /* Create the hdlc cdp hello packet template */ - { - hdlc_and_cdp_header_t h; - - memset (&h, 0, sizeof (h)); - - h.hdlc.address = 0x0f; - /* h.hdlc.control = 0; (memset) */ - h.hdlc.protocol = htons (0x2000); /* CDP = 0x2000 */ - - /* CDP */ - h.cdp.version = 2; - h.cdp.ttl = 180; - - vlib_packet_template_init - (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_HDLC], - /* data */ &h, - sizeof (h), - /* alloc chunk size */ 8, - "cdp-hdlc"); - } - - /* Create the srp cdp hello packet template */ - { - srp_and_cdp_header_t h; - - memset (&h, 0, sizeof (h)); - - /* Send to 01:00:0c:cc:cc */ - h.ethernet.dst_address[0] = 0x01; - /* h.ethernet.dst_address[1] = 0x00; (memset) */ - h.ethernet.dst_address[2] = 0x0C; - h.ethernet.dst_address[3] = 0xCC; - h.ethernet.dst_address[4] = 0xCC; - h.ethernet.dst_address[5] = 0xCC; - - /* leave src address blank (fill in at send time) */ - - /* The srp header is filled in at xmt */ - h.srp.ttl = 1; - h.srp.priority = 7; - h.srp.mode = SRP_MODE_data; - srp_header_compute_parity (&h.srp); - - /* Inner ring and parity will be set at send time */ - - h.ethernet.type = htons (0x2000); /* CDP = 0x2000 */ - - /* CDP */ - h.cdp.version = 2; - h.cdp.ttl = 180; - - vlib_packet_template_init - (vm, &cm->packet_templates[CDP_PACKET_TEMPLATE_SRP], - /* data */ &h, - sizeof (h), - /* alloc chunk size */ 8, - "cdp-srp"); - } -#endif - - return 0; -} - -VLIB_INIT_FUNCTION (cdp_periodic_init); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |