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-rw-r--r--src/vnet/lisp-cp/lisp_msg_serdes.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/src/vnet/lisp-cp/lisp_msg_serdes.c b/src/vnet/lisp-cp/lisp_msg_serdes.c
new file mode 100644
index 00000000000..eee1885cd9b
--- /dev/null
+++ b/src/vnet/lisp-cp/lisp_msg_serdes.c
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 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/lisp-cp/lisp_msg_serdes.h>
+#include <vnet/lisp-cp/packets.h>
+#include <vppinfra/time.h>
+
+void *lisp_msg_put_gid (vlib_buffer_t * b, gid_address_t * gid);
+
+static void
+lisp_msg_put_locators (vlib_buffer_t * b, locator_t * locators)
+{
+ locator_t *loc;
+
+ vec_foreach (loc, locators)
+ {
+ u8 *p = vlib_buffer_put_uninit (b, sizeof (locator_hdr_t));
+ memset (p, 0, sizeof (locator_hdr_t));
+ LOC_PRIORITY (p) = loc->priority;
+ LOC_MPRIORITY (p) = loc->mpriority;
+ LOC_WEIGHT (p) = loc->weight;
+ LOC_MWEIGHT (p) = loc->mweight;
+ LOC_LOCAL (p) = loc->local;
+ LOC_PROBED (p) = loc->probed ? 1 : 0;
+ lisp_msg_put_gid (b, &loc->address);
+ }
+}
+
+static void
+lisp_msg_put_mapping_record (vlib_buffer_t * b, mapping_t * record)
+{
+ mapping_record_hdr_t *p =
+ vlib_buffer_put_uninit (b, sizeof (mapping_record_hdr_t));
+ gid_address_t *eid = &record->eid;
+
+ memset (p, 0, sizeof (*p));
+ MAP_REC_EID_PLEN (p) = gid_address_len (eid);
+ MAP_REC_TTL (p) = clib_host_to_net_u32 (MAP_REGISTER_DEFAULT_TTL);
+ MAP_REC_AUTH (p) = record->authoritative ? 1 : 0;
+ MAP_REC_LOC_COUNT (p) = vec_len (record->locators);
+
+ lisp_msg_put_gid (b, eid);
+ lisp_msg_put_locators (b, record->locators);
+}
+
+static void
+lisp_msg_put_mreg_records (vlib_buffer_t * b, mapping_t * records)
+{
+ u32 i;
+ for (i = 0; i < vec_len (records); i++)
+ lisp_msg_put_mapping_record (b, &records[i]);
+}
+
+void *
+lisp_msg_put_gid (vlib_buffer_t * b, gid_address_t * gid)
+{
+ u8 *p = 0;
+ if (!gid)
+ {
+ /* insert only src-eid-afi field set to 0 */
+ p = vlib_buffer_put_uninit (b, sizeof (u16));
+ *(u16 *) p = 0;
+ }
+ else
+ {
+ p = vlib_buffer_put_uninit (b, gid_address_size_to_put (gid));
+ gid_address_put (p, gid);
+ }
+ return p;
+}
+
+static void *
+lisp_msg_put_itr_rlocs (lisp_cp_main_t * lcm, vlib_buffer_t * b,
+ gid_address_t * rlocs, u8 * locs_put)
+{
+ u8 *bp, count = 0;
+ u32 i;
+
+ bp = vlib_buffer_get_current (b);
+ for (i = 0; i < vec_len (rlocs); i++)
+ {
+ lisp_msg_put_gid (b, &rlocs[i]);
+ count++;
+ }
+
+ *locs_put = count - 1;
+ return bp;
+}
+
+void *
+lisp_msg_put_eid_rec (vlib_buffer_t * b, gid_address_t * eid)
+{
+ eid_record_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (*h));
+
+ memset (h, 0, sizeof (*h));
+ EID_REC_MLEN (h) = gid_address_len (eid);
+ lisp_msg_put_gid (b, eid);
+ return h;
+}
+
+u64
+nonce_build (u32 seed)
+{
+ u64 nonce;
+ u32 nonce_lower;
+ u32 nonce_upper;
+ struct timespec ts;
+
+ /* Put nanosecond clock in lower 32-bits and put an XOR of the nanosecond
+ * clock with the seond clock in the upper 32-bits. */
+ syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
+ nonce_lower = ts.tv_nsec;
+ nonce_upper = ts.tv_sec ^ clib_host_to_net_u32 (nonce_lower);
+
+ /* OR in a caller provided seed to the low-order 32-bits. */
+ nonce_lower |= seed;
+
+ /* Return 64-bit nonce. */
+ nonce = nonce_upper;
+ nonce = (nonce << 32) | nonce_lower;
+ return nonce;
+}
+
+void *
+lisp_msg_put_map_reply (vlib_buffer_t * b, mapping_t * records, u64 nonce,
+ u8 probe_bit)
+{
+ map_reply_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));
+
+ memset (h, 0, sizeof (h[0]));
+ MREP_TYPE (h) = LISP_MAP_REPLY;
+ MREP_NONCE (h) = nonce;
+ MREP_REC_COUNT (h) = 1;
+ MREP_RLOC_PROBE (h) = probe_bit;
+
+ lisp_msg_put_mreg_records (b, records);
+ return h;
+}
+
+void *
+lisp_msg_put_map_register (vlib_buffer_t * b, mapping_t * records,
+ u8 want_map_notify, u16 auth_data_len, u64 * nonce,
+ u32 * msg_len)
+{
+ u8 *auth_data = 0;
+
+ /* Basic header init */
+ map_register_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));
+
+ memset (h, 0, sizeof (h[0]));
+ MREG_TYPE (h) = LISP_MAP_REGISTER;
+ MREG_NONCE (h) = nonce_build (0);
+ MREG_WANT_MAP_NOTIFY (h) = want_map_notify ? 1 : 0;
+ MREG_REC_COUNT (h) = vec_len (records);
+
+ auth_data = vlib_buffer_put_uninit (b, auth_data_len);
+ memset (auth_data, 0, auth_data_len);
+
+ /* Put map register records */
+ lisp_msg_put_mreg_records (b, records);
+
+ nonce[0] = MREG_NONCE (h);
+ msg_len[0] = vlib_buffer_get_tail (b) - (u8 *) h;
+ return h;
+}
+
+void *
+lisp_msg_put_mreq (lisp_cp_main_t * lcm, vlib_buffer_t * b,
+ gid_address_t * seid, gid_address_t * deid,
+ gid_address_t * rlocs, u8 is_smr_invoked,
+ u8 rloc_probe_set, u64 * nonce)
+{
+ u8 loc_count = 0;
+
+ /* Basic header init */
+ map_request_hdr_t *h = vlib_buffer_put_uninit (b, sizeof (h[0]));
+
+ memset (h, 0, sizeof (h[0]));
+ MREQ_TYPE (h) = LISP_MAP_REQUEST;
+ MREQ_NONCE (h) = nonce_build (0);
+ MREQ_SMR_INVOKED (h) = is_smr_invoked ? 1 : 0;
+ MREQ_RLOC_PROBE (h) = rloc_probe_set ? 1 : 0;
+
+ /* We're adding one eid record */
+ increment_record_count (h);
+
+ /* Fill source eid */
+ lisp_msg_put_gid (b, seid);
+
+ /* Put itr rlocs */
+ lisp_msg_put_itr_rlocs (lcm, b, rlocs, &loc_count);
+ MREQ_ITR_RLOC_COUNT (h) = loc_count;
+
+ /* Put eid record */
+ lisp_msg_put_eid_rec (b, deid);
+
+ nonce[0] = MREQ_NONCE (h);
+ return h;
+}
+
+void *
+lisp_msg_push_ecm (vlib_main_t * vm, vlib_buffer_t * b, int lp, int rp,
+ gid_address_t * la, gid_address_t * ra)
+{
+ ecm_hdr_t *h;
+ ip_address_t _src_ip, *src_ip = &_src_ip, _dst_ip, *dst_ip = &_dst_ip;
+ if (gid_address_type (la) != GID_ADDR_IP_PREFIX)
+ {
+ /* empty ip4 */
+ memset (src_ip, 0, sizeof (src_ip[0]));
+ memset (dst_ip, 0, sizeof (dst_ip[0]));
+ }
+ else
+ {
+ src_ip = &gid_address_ip (la);
+ dst_ip = &gid_address_ip (ra);
+ }
+
+ /* Push inner ip and udp */
+ pkt_push_udp_and_ip (vm, b, lp, rp, src_ip, dst_ip);
+
+ /* Push lisp ecm hdr */
+ h = pkt_push_ecm_hdr (b);
+
+ return h;
+}
+
+static u32
+msg_type_to_hdr_len (lisp_msg_type_e type)
+{
+ switch (type)
+ {
+ case LISP_MAP_REQUEST:
+ return (sizeof (map_request_hdr_t));
+ case LISP_MAP_REPLY:
+ return (sizeof (map_reply_hdr_t));
+ default:
+ return (0);
+ }
+}
+
+void *
+lisp_msg_pull_hdr (vlib_buffer_t * b, lisp_msg_type_e type)
+{
+ return vlib_buffer_pull (b, msg_type_to_hdr_len (type));
+}
+
+u32
+lisp_msg_parse_addr (vlib_buffer_t * b, gid_address_t * eid)
+{
+ u32 len;
+ memset (eid, 0, sizeof (*eid));
+ len = gid_address_parse (vlib_buffer_get_current (b), eid);
+ if (len != ~0)
+ vlib_buffer_pull (b, len);
+ return len;
+}
+
+u32
+lisp_msg_parse_eid_rec (vlib_buffer_t * b, gid_address_t * eid)
+{
+ eid_record_hdr_t *h = vlib_buffer_get_current (b);
+ u32 len;
+ memset (eid, 0, sizeof (*eid));
+ len = gid_address_parse (EID_REC_ADDR (h), eid);
+ if (len == ~0)
+ return len;
+
+ gid_address_ippref_len (eid) = EID_REC_MLEN (h);
+ vlib_buffer_pull (b, len + sizeof (eid_record_hdr_t));
+
+ return len + sizeof (eid_record_hdr_t);
+}
+
+u32
+lisp_msg_parse_itr_rlocs (vlib_buffer_t * b, gid_address_t ** rlocs,
+ u8 rloc_count)
+{
+ gid_address_t tloc;
+ u32 i, len = 0, tlen = 0;
+
+ //MREQ_ITR_RLOC_COUNT(mreq_hdr) + 1
+ for (i = 0; i < rloc_count; i++)
+ {
+ len = lisp_msg_parse_addr (b, &tloc);
+ if (len == ~0)
+ return len;
+ vec_add1 (*rlocs, tloc);
+ tlen += len;
+ }
+ return tlen;
+}
+
+u32
+lisp_msg_parse_loc (vlib_buffer_t * b, locator_t * loc)
+{
+ int len;
+
+ len = locator_parse (vlib_buffer_get_current (b), loc);
+ if (len == ~0)
+ return ~0;
+
+ vlib_buffer_pull (b, len);
+
+ return len;
+}
+
+u32
+lisp_msg_parse_mapping_record (vlib_buffer_t * b, gid_address_t * eid,
+ locator_t ** locs, locator_t * probed_)
+{
+ void *h = 0, *loc_hdr = 0;
+ locator_t loc, *probed = 0;
+ int i = 0, len = 0, llen = 0;
+
+ h = vlib_buffer_get_current (b);
+ vlib_buffer_pull (b, sizeof (mapping_record_hdr_t));
+
+ memset (eid, 0, sizeof (*eid));
+ len = gid_address_parse (vlib_buffer_get_current (b), eid);
+ if (len == ~0)
+ return len;
+
+ vlib_buffer_pull (b, len);
+ if (GID_ADDR_IP_PREFIX == gid_address_type (eid))
+ gid_address_ippref_len (eid) = MAP_REC_EID_PLEN (h);
+
+ for (i = 0; i < MAP_REC_LOC_COUNT (h); i++)
+ {
+ loc_hdr = vlib_buffer_get_current (b);
+
+ llen = lisp_msg_parse_loc (b, &loc);
+ if (llen == ~0)
+ return llen;
+ vec_add1 (*locs, loc);
+ len += llen;
+
+ if (LOC_PROBED (loc_hdr))
+ {
+ if (probed != 0)
+ clib_warning
+ ("Multiple locators probed! Probing only the first!");
+ else
+ probed = &loc;
+ }
+ }
+ /* XXX */
+ if (probed_ != 0 && probed)
+ *probed_ = *probed;
+
+ return len + sizeof (map_reply_hdr_t);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */