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authorFilip Tehlar <ftehlar@cisco.com>2020-10-30 05:28:11 +0000
committerBeno�t Ganne <bganne@cisco.com>2020-11-04 08:07:55 +0000
commit68ad6258374201ba8f0dc052e6f44d6250555249 (patch)
tree3b984145b8b4fcf9750adcd6f6298b7c3bcfe20a /src/plugins/ikev2
parent761f8f0eaaf43f38fdd9d160ba19ff833de7d210 (diff)
ikev2: fix reply during rekey
Type: fix Change-Id: If87f4b8ae92508215fe91178958fe2ddb91e5a35 Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Diffstat (limited to 'src/plugins/ikev2')
-rw-r--r--src/plugins/ikev2/ikev2.c2
-rw-r--r--src/plugins/ikev2/test/test_ikev2.py234
2 files changed, 192 insertions, 44 deletions
diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c
index 5103da0486c..ae48b44f36b 100644
--- a/src/plugins/ikev2/ikev2.c
+++ b/src/plugins/ikev2/ikev2.c
@@ -3155,7 +3155,7 @@ ikev2_node_internal (vlib_main_t * vm,
ikev2_create_tunnel_interface (vm, sa0, child, p[0],
child - sa0->childs, 1);
}
- if (sa0->is_initiator)
+ if (ike_hdr_is_response (ike0))
{
vec_free (sa0->rekey);
}
diff --git a/src/plugins/ikev2/test/test_ikev2.py b/src/plugins/ikev2/test/test_ikev2.py
index ec68658f564..91cec8e9a62 100644
--- a/src/plugins/ikev2/test/test_ikev2.py
+++ b/src/plugins/ikev2/test/test_ikev2.py
@@ -151,10 +151,28 @@ PRF_ALGOS = {
hashes.SHA256, 32),
}
+CRYPTO_IDS = {
+ 12: 'AES-CBC',
+ 20: 'AES-GCM-16ICV',
+}
+
+INTEG_IDS = {
+ 2: 'HMAC-SHA1-96',
+ 12: 'SHA2-256-128',
+ 13: 'SHA2-384-192',
+ 14: 'SHA2-512-256',
+}
+
class IKEv2ChildSA(object):
- def __init__(self, local_ts, remote_ts, spi=None):
- self.spi = spi or os.urandom(4)
+ def __init__(self, local_ts, remote_ts, is_initiator):
+ spi = os.urandom(4)
+ if is_initiator:
+ self.ispi = spi
+ self.rspi = None
+ else:
+ self.rspi = spi
+ self.ispi = None
self.local_ts = local_ts
self.remote_ts = remote_ts
@@ -193,7 +211,8 @@ class IKEv2SA(object):
self.rspi = spi
self.ispi = 8 * b'\x00'
self.r_nonce = nonce
- self.child_sas = [IKEv2ChildSA(local_ts, remote_ts)]
+ self.child_sas = [IKEv2ChildSA(local_ts, remote_ts,
+ self.is_initiator)]
def new_msg_id(self):
self.msg_id += 1
@@ -559,9 +578,11 @@ class IkePeer(VppTestCase):
self.config_tc()
self.p.add_vpp_config()
self.assertIsNotNone(self.p.query_vpp_config())
- self.sa.generate_dh_data()
+ if self.sa.is_initiator:
+ self.sa.generate_dh_data()
self.vapi.cli('ikev2 set logging level 4')
self.vapi.cli('event-lo clear')
+ self.vapi.cli('ikev2 dpd disable')
def create_packet(self, src_if, msg, sport=500, dport=500, natt=False,
use_ip6=False):
@@ -641,16 +662,30 @@ class IkePeer(VppTestCase):
assert(len(res) == tlen)
return res
- def verify_ipsec_sas(self):
+ def verify_ipsec_sas(self, is_rekey=False):
sas = self.vapi.ipsec_sa_dump()
- self.assertEqual(len(sas), 2)
+ if is_rekey:
+ # after rekey there is a short period of time in which old
+ # inbound SA is still present
+ sa_count = 3
+ else:
+ sa_count = 2
+ self.assertEqual(len(sas), sa_count)
e = VppEnum.vl_api_ipsec_sad_flags_t
if self.sa.is_initiator:
- sa0 = sas[0].entry
- sa1 = sas[1].entry
+ if is_rekey:
+ sa0 = sas[0].entry
+ sa1 = sas[2].entry
+ else:
+ sa0 = sas[0].entry
+ sa1 = sas[1].entry
else:
- sa1 = sas[0].entry
- sa0 = sas[1].entry
+ if is_rekey:
+ sa0 = sas[2].entry
+ sa1 = sas[0].entry
+ else:
+ sa1 = sas[0].entry
+ sa0 = sas[1].entry
c = self.sa.child_sas[0]
@@ -738,6 +773,8 @@ class IkePeer(VppTestCase):
self.verify_keymat(csa.keys, c, 'sk_ar')
self.verify_keymat(csa.keys, c, 'sk_ei')
self.verify_keymat(csa.keys, c, 'sk_er')
+ self.assertEqual(csa.i_spi.to_bytes(4, 'big'), c.ispi)
+ self.assertEqual(csa.r_spi.to_bytes(4, 'big'), c.rspi)
tsi, tsr = self.sa.generate_ts(self.p.ts_is_ip4)
tsi = tsi[0]
@@ -888,9 +925,23 @@ class TemplateInitiator(IkePeer):
self.p.ike_transforms['dh_group'])
self.verify_nat_detection(packet)
+ self.sa.set_ike_props(
+ crypto='AES-GCM-16ICV', crypto_key_len=32,
+ integ='NULL', prf='PRF_HMAC_SHA2_256', dh='3072MODPgr')
+ self.sa.set_esp_props(crypto='AES-CBC', crypto_key_len=32,
+ integ='SHA2-256-128')
+ self.sa.generate_dh_data()
self.sa.complete_dh_data()
self.sa.calc_keys()
+ def update_esp_transforms(self, trans, sa):
+ while trans:
+ if trans.transform_type == 1: # ecryption
+ sa.esp_crypto = CRYPTO_IDS[trans.transform_id]
+ elif trans.transform_type == 3: # integrity
+ sa.esp_integ = INTEG_IDS[trans.transform_id]
+ trans = trans.payload
+
def verify_sa_auth_req(self, packet):
ih = self.get_ike_header(packet)
self.assertEqual(ih.resp_SPI, self.sa.rspi)
@@ -908,6 +959,11 @@ class TemplateInitiator(IkePeer):
idr = ikev2.IKEv2_payload_IDr(idi.payload)
self.assertEqual(idi.load, self.sa.i_id)
self.assertEqual(idr.load, self.sa.r_id)
+ prop = idi[ikev2.IKEv2_payload_Proposal]
+ c = self.sa.child_sas[0]
+ c.ispi = prop.SPI
+ self.update_esp_transforms(
+ prop[ikev2.IKEv2_payload_Transform], self.sa)
def send_init_response(self):
tr_attr = self.sa.ike_crypto_attr()
@@ -961,8 +1017,9 @@ class TemplateInitiator(IkePeer):
transform_type='Extended Sequence Number',
transform_id='ESN'))
+ c = self.sa.child_sas[0]
props = (ikev2.IKEv2_payload_Proposal(proposal=1, proto='ESP',
- SPIsize=4, SPI=os.urandom(4), trans_nb=4, trans=trans))
+ SPIsize=4, SPI=c.rspi, trans_nb=4, trans=trans))
tsi, tsr = self.sa.generate_ts(self.p.ts_is_ip4)
plain = (ikev2.IKEv2_payload_IDi(next_payload='IDr',
@@ -1103,8 +1160,9 @@ class TemplateResponder(IkePeer):
capture = self.pg0.get_capture(1)
self.verify_sa_init(capture[0])
- def send_sa_auth(self):
+ def generate_auth_payload(self, last_payload=None, is_rekey=False):
tr_attr = self.sa.esp_crypto_attr()
+ last_payload = last_payload or 'Notify'
trans = (ikev2.IKEv2_payload_Transform(transform_type='Encryption',
transform_id=self.sa.esp_crypto, length=tr_attr[1],
key_length=tr_attr[0]) /
@@ -1117,32 +1175,45 @@ class TemplateResponder(IkePeer):
transform_type='Extended Sequence Number',
transform_id='ESN'))
+ c = self.sa.child_sas[0]
props = (ikev2.IKEv2_payload_Proposal(proposal=1, proto='ESP',
- SPIsize=4, SPI=os.urandom(4), trans_nb=4, trans=trans))
+ SPIsize=4, SPI=c.ispi, trans_nb=4, trans=trans))
tsi, tsr = self.sa.generate_ts(self.p.ts_is_ip4)
- plain = (ikev2.IKEv2_payload_IDi(next_payload='IDr',
- IDtype=self.sa.id_type, load=self.sa.i_id) /
- ikev2.IKEv2_payload_IDr(next_payload='AUTH',
- IDtype=self.sa.id_type, load=self.sa.r_id) /
- ikev2.IKEv2_payload_AUTH(next_payload='SA',
+ plain = (ikev2.IKEv2_payload_AUTH(next_payload='SA',
auth_type=AuthMethod.value(self.sa.auth_method),
load=self.sa.auth_data) /
ikev2.IKEv2_payload_SA(next_payload='TSi', prop=props) /
ikev2.IKEv2_payload_TSi(next_payload='TSr',
- number_of_TSs=len(tsi),
- traffic_selector=tsi) /
- ikev2.IKEv2_payload_TSr(next_payload='Notify',
- number_of_TSs=len(tsr),
- traffic_selector=tsr) /
- ikev2.IKEv2_payload_Notify(type='INITIAL_CONTACT'))
+ number_of_TSs=len(tsi), traffic_selector=tsi) /
+ ikev2.IKEv2_payload_TSr(next_payload=last_payload,
+ number_of_TSs=len(tsr), traffic_selector=tsr))
+
+ if is_rekey:
+ first_payload = 'Nonce'
+ plain = (ikev2.IKEv2_payload_Nonce(load=self.sa.i_nonce,
+ next_payload='SA') / plain /
+ ikev2.IKEv2_payload_Notify(type='REKEY_SA',
+ proto='ESP', SPI=c.ispi))
+ else:
+ first_payload = 'IDi'
+ ids = (ikev2.IKEv2_payload_IDi(next_payload='IDr',
+ IDtype=self.sa.id_type, load=self.sa.i_id) /
+ ikev2.IKEv2_payload_IDr(next_payload='AUTH',
+ IDtype=self.sa.id_type, load=self.sa.r_id))
+ plain = ids / plain
+ return plain, first_payload
+ def send_sa_auth(self):
+ plain, first_payload = self.generate_auth_payload(
+ last_payload='Notify')
+ plain = plain / ikev2.IKEv2_payload_Notify(type='INITIAL_CONTACT')
header = ikev2.IKEv2(
init_SPI=self.sa.ispi,
resp_SPI=self.sa.rspi, id=self.sa.new_msg_id(),
flags='Initiator', exch_type='IKE_AUTH')
- ike_msg = self.encrypt_ike_msg(header, plain, 'IDi')
+ ike_msg = self.encrypt_ike_msg(header, plain, first_payload)
packet = self.create_packet(self.pg0, ike_msg, self.sa.sport,
self.sa.dport, self.sa.natt, self.ip6)
self.pg0.add_stream(packet)
@@ -1178,6 +1249,10 @@ class TemplateResponder(IkePeer):
self.verify_udp(udp)
self.assertEqual(ike.id, self.sa.msg_id)
plain = self.sa.hmac_and_decrypt(ike)
+ idr = ikev2.IKEv2_payload_IDr(plain)
+ prop = idr[ikev2.IKEv2_payload_Proposal]
+ self.assertEqual(prop.SPIsize, 4)
+ self.sa.child_sas[0].rspi = prop.SPI
self.sa.calc_child_keys()
def test_responder(self):
@@ -1264,24 +1339,25 @@ class Ikev2Params(object):
auth_data=auth_data,
local_ts=self.p.remote_ts, remote_ts=self.p.local_ts)
- ike_crypto = ('AES-CBC', 32) if 'ike-crypto' not in params else\
- params['ike-crypto']
- ike_integ = 'HMAC-SHA1-96' if 'ike-integ' not in params else\
- params['ike-integ']
- ike_dh = '2048MODPgr' if 'ike-dh' not in params else\
- params['ike-dh']
-
- esp_crypto = ('AES-CBC', 32) if 'esp-crypto' not in params else\
- params['esp-crypto']
- esp_integ = 'HMAC-SHA1-96' if 'esp-integ' not in params else\
- params['esp-integ']
-
- self.sa.set_ike_props(
- crypto=ike_crypto[0], crypto_key_len=ike_crypto[1],
- integ=ike_integ, prf='PRF_HMAC_SHA2_256', dh=ike_dh)
- self.sa.set_esp_props(
- crypto=esp_crypto[0], crypto_key_len=esp_crypto[1],
- integ=esp_integ)
+ if is_init:
+ ike_crypto = ('AES-CBC', 32) if 'ike-crypto' not in params else\
+ params['ike-crypto']
+ ike_integ = 'HMAC-SHA1-96' if 'ike-integ' not in params else\
+ params['ike-integ']
+ ike_dh = '2048MODPgr' if 'ike-dh' not in params else\
+ params['ike-dh']
+
+ esp_crypto = ('AES-CBC', 32) if 'esp-crypto' not in params else\
+ params['esp-crypto']
+ esp_integ = 'HMAC-SHA1-96' if 'esp-integ' not in params else\
+ params['esp-integ']
+
+ self.sa.set_ike_props(
+ crypto=ike_crypto[0], crypto_key_len=ike_crypto[1],
+ integ=ike_integ, prf='PRF_HMAC_SHA2_256', dh=ike_dh)
+ self.sa.set_esp_props(
+ crypto=esp_crypto[0], crypto_key_len=esp_crypto[1],
+ integ=esp_integ)
class TestApi(VppTestCase):
@@ -1491,6 +1567,44 @@ class TestInitiatorPsk(TemplateInitiator, Ikev2Params):
'integ_alg': 12}})
+class TestInitiatorRekey(TestInitiatorPsk):
+ """ test ikev2 initiator - rekey """
+
+ def rekey_from_initiator(self):
+ ispi = int.from_bytes(self.sa.child_sas[0].ispi, 'little')
+ self.pg0.enable_capture()
+ self.pg_start()
+ self.vapi.ikev2_initiate_rekey_child_sa(ispi=ispi)
+ capture = self.pg0.get_capture(1)
+ ih = self.get_ike_header(capture[0])
+ self.assertEqual(ih.exch_type, 36) # CHILD_SA
+ self.assertNotIn('Response', ih.flags)
+ self.assertIn('Initiator', ih.flags)
+ plain = self.sa.hmac_and_decrypt(ih)
+ sa = ikev2.IKEv2_payload_SA(plain)
+ prop = sa[ikev2.IKEv2_payload_Proposal]
+ nonce = sa[ikev2.IKEv2_payload_Nonce]
+ self.sa.i_nonce = sa[ikev2.IKEv2_payload_Nonce].load
+ self.sa.r_nonce = self.sa.i_nonce
+ # update new responder SPI
+ self.sa.child_sas[0].ispi = prop.SPI
+ self.sa.child_sas[0].rspi = prop.SPI
+ self.sa.calc_child_keys()
+ header = ikev2.IKEv2(init_SPI=self.sa.ispi, resp_SPI=self.sa.rspi,
+ flags='Response', exch_type=36,
+ id=ih.id, next_payload='Encrypted')
+ resp = self.encrypt_ike_msg(header, sa, 'SA')
+ packet = self.create_packet(self.pg0, resp, self.sa.sport,
+ self.sa.dport, self.sa.natt, self.ip6)
+ self.send_and_assert_no_replies(self.pg0, packet)
+
+ def test_initiator(self):
+ super(TestInitiatorRekey, self).test_initiator()
+ self.rekey_from_initiator()
+ self.verify_ike_sas()
+ self.verify_ipsec_sas(is_rekey=True)
+
+
class TestInitiatorDelSAFromResponder(TemplateInitiator, Ikev2Params):
""" test ikev2 initiator - delete IKE SA from responder """
@@ -1529,6 +1643,40 @@ class TestResponderPsk(TemplateResponder, Ikev2Params):
self.config_params()
+class TestResponderRekey(TestResponderPsk):
+ """ test ikev2 responder - rekey """
+
+ def rekey_from_initiator(self):
+ sa, first_payload = self.generate_auth_payload(is_rekey=True)
+ header = ikev2.IKEv2(
+ init_SPI=self.sa.ispi,
+ resp_SPI=self.sa.rspi, id=self.sa.new_msg_id(),
+ flags='Initiator', exch_type='CREATE_CHILD_SA')
+
+ ike_msg = self.encrypt_ike_msg(header, sa, first_payload)
+ packet = self.create_packet(self.pg0, ike_msg, self.sa.sport,
+ self.sa.dport, self.sa.natt, self.ip6)
+ self.pg0.add_stream(packet)
+ self.pg0.enable_capture()
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ ih = self.get_ike_header(capture[0])
+ plain = self.sa.hmac_and_decrypt(ih)
+ sa = ikev2.IKEv2_payload_SA(plain)
+ prop = sa[ikev2.IKEv2_payload_Proposal]
+ nonce = sa[ikev2.IKEv2_payload_Nonce]
+ self.sa.r_nonce = sa[ikev2.IKEv2_payload_Nonce].load
+ # update new responder SPI
+ self.sa.child_sas[0].rspi = prop.SPI
+
+ def test_responder(self):
+ super(TestResponderRekey, self).test_responder()
+ self.rekey_from_initiator()
+ self.sa.calc_child_keys()
+ self.verify_ike_sas()
+ self.verify_ipsec_sas(is_rekey=True)
+
+
class TestResponderRsaSign(TemplateResponder, Ikev2Params):
""" test ikev2 responder - cert based auth """
def config_tc(self):
66 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 
/*
 * 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.
 */
/*
  Copyright (c) 2005 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

/* Turn data structures into byte streams for saving or transport. */

#include <vppinfra/heap.h>
#include <vppinfra/pool.h>
#include <vppinfra/serialize.h>

void
serialize_64 (serialize_main_t * m, va_list * va)
{
  u64 x = va_arg (*va, u64);
  u32 lo, hi;
  lo = x;
  hi = x >> 32;
  serialize_integer (m, lo, sizeof (lo));
  serialize_integer (m, hi, sizeof (hi));
}

void
serialize_32 (serialize_main_t * m, va_list * va)
{
  u32 x = va_arg (*va, u32);
  serialize_integer (m, x, sizeof (x));
}

void
serialize_16 (serialize_main_t * m, va_list * va)
{
  u32 x = va_arg (*va, u32);
  serialize_integer (m, x, sizeof (u16));
}

void
serialize_8 (serialize_main_t * m, va_list * va)
{
  u32 x = va_arg (*va, u32);
  serialize_integer (m, x, sizeof (u8));
}

void
unserialize_64 (serialize_main_t * m, va_list * va)
{
  u64 *x = va_arg (*va, u64 *);
  u32 lo, hi;
  unserialize_integer (m, &lo, sizeof (lo));
  unserialize_integer (m, &hi, sizeof (hi));
  *x = ((u64) hi << 32) | (u64) lo;
}

void
unserialize_32 (serialize_main_t * m, va_list * va)
{
  u32 *x = va_arg (*va, u32 *);
  unserialize_integer (m, x, sizeof (x[0]));
}

void
unserialize_16 (serialize_main_t * m, va_list * va)
{
  u16 *x = va_arg (*va, u16 *);
  u32 t;
  unserialize_integer (m, &t, sizeof (x[0]));
  x[0] = t;
}

void
unserialize_8 (serialize_main_t * m, va_list * va)
{
  u8 *x = va_arg (*va, u8 *);
  u32 t;
  unserialize_integer (m, &t, sizeof (x[0]));
  x[0] = t;
}

void
serialize_f64 (serialize_main_t * m, va_list * va)
{
  f64 x = va_arg (*va, f64);
  union
  {
    f64 f;
    u64 i;
  } y;
  y.f = x;
  serialize (m, serialize_64, y.i);
}

void
serialize_f32 (serialize_main_t * m, va_list * va)
{
  f32 x = va_arg (*va, f64);
  union
  {
    f32 f;
    u32 i;
  } y;
  y.f = x;
  serialize_integer (m, y.i, sizeof (y.i));
}

void
unserialize_f64 (serialize_main_t * m, va_list * va)
{
  f64 *x = va_arg (*va, f64 *);
  union
  {
    f64 f;
    u64 i;
  } y;
  unserialize (m, unserialize_64, &y.i);
  *x = y.f;
}

void
unserialize_f32 (serialize_main_t * m, va_list * va)
{
  f32 *x = va_arg (*va, f32 *);
  union
  {
    f32 f;
    u32 i;
  } y;
  unserialize_integer (m, &y.i, sizeof (y.i));
  *x = y.f;
}

void
serialize_cstring (serialize_main_t * m, char *s)
{
  u32 len = s ? strlen (s) : 0;
  void *p;

  serialize_likely_small_unsigned_integer (m, len);
  if (len > 0)
    {
      p = serialize_get (m, len);
      clib_memcpy_fast (p, s, len);
    }
}

void
unserialize_cstring (serialize_main_t * m, char **s)
{
  char *p, *r = 0;
  u32 len;

  len = unserialize_likely_small_unsigned_integer (m);

  /*
   * Given broken enough data, we could get len = 0xFFFFFFFF.
   * Add one, it overflows, we call vec_new (char, 0), then
   * memcpy until we bus error.
   */
  if (len > 0 && len != 0xFFFFFFFF)
    {
      r = vec_new (char, len + 1);
      p = unserialize_get (m, len);
      clib_memcpy_fast (r, p, len);

      /* Null terminate. */
      r[len] = 0;
    }
  *s = r;
}

/* vec_serialize/vec_unserialize helper functions for basic vector types. */
void
serialize_vec_8 (serialize_main_t * m, va_list * va)
{
  u8 *s = va_arg (*va, u8 *);
  u32 n = va_arg (*va, u32);
  u8 *p = serialize_get (m, n * sizeof (u8));
  clib_memcpy_fast (p, s, n * sizeof (u8));
}

void
unserialize_vec_8 (serialize_main_t * m, va_list * va)
{
  u8 *s = va_arg (*va, u8 *);
  u32 n = va_arg (*va, u32);
  u8 *p = unserialize_get (m, n);
  clib_memcpy_fast (s, p, n);
}

#define _(n_bits)							\
  void serialize_vec_##n_bits (serialize_main_t * m, va_list * va)	\
  {									\
    u##n_bits * s = va_arg (*va, u##n_bits *);				\
    u32 n = va_arg (*va, u32);						\
    u##n_bits * p = serialize_get (m, n * sizeof (s[0]));		\
									\
    while (n >= 4)							\
      {									\
	p[0] = clib_host_to_net_u##n_bits (s[0]);			\
	p[1] = clib_host_to_net_u##n_bits (s[1]);			\
	p[2] = clib_host_to_net_u##n_bits (s[2]);			\
	p[3] = clib_host_to_net_u##n_bits (s[3]);			\
	s += 4;								\
	p += 4;								\
	n -= 4;								\
      }									\
									\
    while (n >= 1)							\
      {									\
	p[0] = clib_host_to_net_u##n_bits (s[0]);			\
	s += 1;								\
	p += 1;								\
	n -= 1;								\
      }									\
  }									\
									\
  void unserialize_vec_##n_bits (serialize_main_t * m, va_list * va)	\
  {									\
    u##n_bits * s = va_arg (*va, u##n_bits *);				\
    u32 n = va_arg (*va, u32);						\
    u##n_bits * p = unserialize_get (m, n * sizeof (s[0]));		\
									\
    while (n >= 4)							\
      {									\
	s[0] = clib_net_to_host_mem_u##n_bits (&p[0]);			\
	s[1] = clib_net_to_host_mem_u##n_bits (&p[1]);			\
	s[2] = clib_net_to_host_mem_u##n_bits (&p[2]);			\
	s[3] = clib_net_to_host_mem_u##n_bits (&p[3]);			\
	s += 4;								\
	p += 4;								\
	n -= 4;								\
      }									\
									\
    while (n >= 1)							\
      {									\
	s[0] = clib_net_to_host_mem_u##n_bits (&p[0]);			\
	s += 1;								\
	p += 1;								\
	n -= 1;								\
      }									\
  }

_(16);
_(32);
_(64);

#undef _

#define SERIALIZE_VECTOR_CHUNK_SIZE 64

void
serialize_vector (serialize_main_t * m, va_list * va)
{
  void *vec = va_arg (*va, void *);
  u32 elt_bytes = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  u32 l = vec_len (vec);
  void *p = vec;

  serialize_integer (m, l, sizeof (l));

  /* Serialize vector in chunks for cache locality. */
  while (l != 0)
    {
      u32 n = clib_min (SERIALIZE_VECTOR_CHUNK_SIZE, l);
      serialize (m, f, p, n);
      l -= n;
      p += SERIALIZE_VECTOR_CHUNK_SIZE * elt_bytes;
    }
}

void *
unserialize_vector_ha (serialize_main_t * m,
		       u32 elt_bytes,
		       u32 header_bytes,
		       u32 align, u32 max_length, serialize_function_t * f)
{
  void *v, *p;
  u32 l;

  unserialize_integer (m, &l, sizeof (l));
  if (l > max_length)
    serialize_error (&m->header,
		     clib_error_create ("bad vector length %d", l));
  p = v = _vec_resize ((void *) 0, l, (uword) l * elt_bytes, header_bytes,
		       /* align */ align);

  while (l != 0)
    {
      u32 n = clib_min (SERIALIZE_VECTOR_CHUNK_SIZE, l);
      unserialize (m, f, p, n);
      l -= n;
      p += SERIALIZE_VECTOR_CHUNK_SIZE * elt_bytes;
    }
  return v;
}

void
unserialize_aligned_vector (serialize_main_t * m, va_list * va)
{
  void **vec = va_arg (*va, void **);
  u32 elt_bytes = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  u32 align = va_arg (*va, u32);

  *vec = unserialize_vector_ha (m, elt_bytes,
				/* header_bytes */ 0,
				/* align */ align,
				/* max_length */ ~0,
				f);
}

void
unserialize_vector (serialize_main_t * m, va_list * va)
{
  void **vec = va_arg (*va, void **);
  u32 elt_bytes = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);

  *vec = unserialize_vector_ha (m, elt_bytes,
				/* header_bytes */ 0,
				/* align */ 0,
				/* max_length */ ~0,
				f);
}

void
serialize_bitmap (serialize_main_t * m, uword * b)
{
  u32 l, i, n_u32s;

  l = vec_len (b);
  n_u32s = l * sizeof (b[0]) / sizeof (u32);
  serialize_integer (m, n_u32s, sizeof (n_u32s));

  /* Send 32 bit words, low-order word first on 64 bit. */
  for (i = 0; i < l; i++)
    {
      serialize_integer (m, b[i], sizeof (u32));
      if (BITS (uword) == 64)
	serialize_integer (m, (u64) b[i] >> (u64) 32, sizeof (u32));
    }
}

uword *
unserialize_bitmap (serialize_main_t * m)
{
  uword *b = 0;
  u32 i, n_u32s;

  unserialize_integer (m, &n_u32s, sizeof (n_u32s));
  if (n_u32s == 0)
    return b;

  i = (n_u32s * sizeof (u32) + sizeof (b[0]) - 1) / sizeof (b[0]);
  vec_resize (b, i);
  for (i = 0; i < n_u32s; i++)
    {
      u32 data;
      unserialize_integer (m, &data, sizeof (u32));

      /* Low-word is first on 64 bit. */
      if (BITS (uword) == 64)
	{
	  if ((i % 2) == 0)
	    b[i / 2] |= (u64) data << (u64) 0;
	  else
	    b[i / 2] |= (u64) data << (u64) 32;
	}
      else
	{
	  b[i] = data;
	}
    }

  return b;
}

void
serialize_pool (serialize_main_t * m, va_list * va)
{
  void *pool = va_arg (*va, void *);
  u32 elt_bytes = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  u32 l, lo, hi;
  pool_header_t *p;

  l = vec_len (pool);
  serialize_integer (m, l, sizeof (u32));
  if (l == 0)
    return;
  p = pool_header (pool);

  /* No need to send free bitmap.  Need to send index vector
     to guarantee that unserialized pool will be identical. */
  vec_serialize (m, p->free_indices, serialize_vec_32);

  pool_foreach_region (lo, hi, pool,
		       serialize (m, f, pool + lo * elt_bytes, hi - lo));
}

static void *
unserialize_pool_helper (serialize_main_t * m,
			 u32 elt_bytes, u32 align, serialize_function_t * f)
{
  void *v;
  u32 i, l, lo, hi;
  pool_header_t *p;

  unserialize_integer (m, &l, sizeof (l));
  if (l == 0)
    {
      return 0;
    }

  v = _vec_resize ((void *) 0, l, (uword) l * elt_bytes, sizeof (p[0]),
		   align);
  p = pool_header (v);

  vec_unserialize (m, &p->free_indices, unserialize_vec_32);

  /* Construct free bitmap. */
  p->free_bitmap = 0;
  for (i = 0; i < vec_len (p->free_indices); i++)
    p->free_bitmap = clib_bitmap_ori (p->free_bitmap, p->free_indices[i]);

  pool_foreach_region (lo, hi, v,
		       unserialize (m, f, v + lo * elt_bytes, hi - lo));

  return v;
}

void
unserialize_pool (serialize_main_t * m, va_list * va)
{
  void **result = va_arg (*va, void **);
  u32 elt_bytes = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  *result = unserialize_pool_helper (m, elt_bytes, /* align */ 0, f);
}

void
unserialize_aligned_pool (serialize_main_t * m, va_list * va)
{
  void **result = va_arg (*va, void **);
  u32 elt_bytes = va_arg (*va, u32);
  u32 align = va_arg (*va, u32);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  *result = unserialize_pool_helper (m, elt_bytes, align, f);
}

static void
serialize_vec_heap_elt (serialize_main_t * m, va_list * va)
{
  heap_elt_t *e = va_arg (*va, heap_elt_t *);
  u32 i, n = va_arg (*va, u32);
  for (i = 0; i < n; i++)
    {
      serialize_integer (m, e[i].offset, sizeof (e[i].offset));
      serialize_integer (m, e[i].next, sizeof (e[i].next));
      serialize_integer (m, e[i].prev, sizeof (e[i].prev));
    }
}

static void
unserialize_vec_heap_elt (serialize_main_t * m, va_list * va)
{
  heap_elt_t *e = va_arg (*va, heap_elt_t *);
  u32 i, n = va_arg (*va, u32);
  for (i = 0; i < n; i++)
    {
      unserialize_integer (m, &e[i].offset, sizeof (e[i].offset));
      unserialize_integer (m, &e[i].next, sizeof (e[i].next));
      unserialize_integer (m, &e[i].prev, sizeof (e[i].prev));
    }
}

void
serialize_heap (serialize_main_t * m, va_list * va)
{
  void *heap = va_arg (*va, void *);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  u32 i, l;
  heap_header_t *h;

  l = vec_len (heap);
  serialize_integer (m, l, sizeof (u32));
  if (l == 0)
    return;

  h = heap_header (heap);

#define foreach_serialize_heap_header_integer \
  _ (head) _ (tail) _ (used_count) _ (max_len) _ (flags) _ (elt_bytes)

#define _(f) serialize_integer (m, h->f, sizeof (h->f));
  foreach_serialize_heap_header_integer;
#undef _

  serialize_integer (m, vec_len (h->free_lists), sizeof (u32));
  for (i = 0; i < vec_len (h->free_lists); i++)
    vec_serialize (m, h->free_lists[i], serialize_vec_32);

  vec_serialize (m, h->elts, serialize_vec_heap_elt);
  vec_serialize (m, h->small_free_elt_free_index, serialize_vec_32);
  vec_serialize (m, h->free_elts, serialize_vec_32);

  /* Serialize data in heap. */
  {
    heap_elt_t *e, *end;
    e = h->elts + h->head;
    end = h->elts + h->tail;
    while (1)
      {
	if (!heap_is_free (e))
	  {
	    void *v = heap + heap_offset (e) * h->elt_bytes;
	    u32 n = heap_elt_size (heap, e);
	    serialize (m, f, v, n);
	  }
	if (e == end)
	  break;
	e = heap_next (e);
      }
  }
}

void
unserialize_heap (serialize_main_t * m, va_list * va)
{
  void **result = va_arg (*va, void **);
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  u32 i, vl, fl;
  heap_header_t h;
  void *heap;

  unserialize_integer (m, &vl, sizeof (u32));
  if (vl == 0)
    {
      *result = 0;
      return;
    }

  clib_memset (&h, 0, sizeof (h));
#define _(f) unserialize_integer (m, &h.f, sizeof (h.f));
  foreach_serialize_heap_header_integer;
#undef _

  unserialize_integer (m, &fl, sizeof (u32));
  vec_resize (h.free_lists, fl);

  for (i = 0; i < vec_len (h.free_lists); i++)
    vec_unserialize (m, &h.free_lists[i], unserialize_vec_32);

  vec_unserialize (m, &h.elts, unserialize_vec_heap_elt);
  vec_unserialize (m, &h.small_free_elt_free_index, unserialize_vec_32);
  vec_unserialize (m, &h.free_elts, unserialize_vec_32);

  /* Re-construct used elt bitmap. */
  if (CLIB_DEBUG > 0)
    {
      heap_elt_t *e;
      vec_foreach (e, h.elts)
      {
	if (!heap_is_free (e))
	  h.used_elt_bitmap = clib_bitmap_ori (h.used_elt_bitmap, e - h.elts);
      }
    }

  heap = *result = _heap_new (vl, h.elt_bytes);
  heap_header (heap)[0] = h;

  /* Unserialize data in heap. */
  {
    heap_elt_t *e, *end;
    e = h.elts + h.head;
    end = h.elts + h.tail;
    while (1)
      {
	if (!heap_is_free (e))
	  {
	    void *v = heap + heap_offset (e) * h.elt_bytes;
	    u32 n = heap_elt_size (heap, e);
	    unserialize (m, f, v, n);
	  }
	if (e == end)
	  break;
	e = heap_next (e);
      }
  }
}

void
serialize_magic (serialize_main_t * m, void *magic, u32 magic_bytes)
{
  void *p;
  serialize_integer (m, magic_bytes, sizeof (magic_bytes));
  p = serialize_get (m, magic_bytes);
  clib_memcpy_fast (p, magic, magic_bytes);
}

void
unserialize_check_magic (serialize_main_t * m, void *magic, u32 magic_bytes)
{
  u32 l;
  void *d;

  unserialize_integer (m, &l, sizeof (l));
  if (l != magic_bytes)
    {
    bad:
      serialize_error_return (m, "bad magic number");
    }
  d = serialize_get (m, magic_bytes);
  if (memcmp (magic, d, magic_bytes))
    goto bad;
}

clib_error_t *
va_serialize (serialize_main_t * sm, va_list * va)
{
  serialize_main_header_t *m = &sm->header;
  serialize_function_t *f = va_arg (*va, serialize_function_t *);
  clib_error_t *error = 0;

  m->recursion_level += 1;
  if (m->recursion_level == 1)
    {
      uword r = clib_setjmp (&m->error_longjmp, 0);
      error = uword_to_pointer (r, clib_error_t *);
    }

  if (!error)
    f (sm, va);

  m->recursion_level -= 1;
  return error;
}

clib_error_t *
serialize (serialize_main_t * m, ...)
{
  clib_error_t *error;
  va_list va;

  va_start (va, m);
  error = va_serialize (m, &va);
  va_end (va);
  return error;
}

clib_error_t *
unserialize (serialize_main_t * m, ...)
{
  clib_error_t *error;
  va_list va;

  va_start (va, m);
  error = va_serialize (m, &va);
  va_end (va);
  return error;
}

static void *
serialize_write_not_inline (serialize_main_header_t * m,
			    serialize_stream_t * s,
			    uword n_bytes_to_write, uword flags)
{
  uword cur_bi, n_left_b, n_left_o;

  ASSERT (s->current_buffer_index <= s->n_buffer_bytes);
  cur_bi = s->current_buffer_index;
  n_left_b = s->n_buffer_bytes - cur_bi;
  n_left_o = vec_len (s->overflow_buffer);

  /* Prepend overflow buffer if present. */
  do
    {
      if (n_left_o > 0 && n_left_b > 0)
	{
	  uword n = clib_min (n_left_b, n_left_o);
	  clib_memcpy_fast (s->buffer + cur_bi, s->overflow_buffer, n);
	  cur_bi += n;
	  n_left_b -= n;
	  n_left_o -= n;
	  if (n_left_o == 0)
	    _vec_len (s->overflow_buffer) = 0;
	  else
	    vec_delete (s->overflow_buffer, n, 0);
	}

      /* Call data function when buffer is complete.  Data function should
         dispatch with current buffer and give us a new one to write more
         data into. */
      if (n_left_b == 0)
	{
	  s->current_buffer_index = cur_bi;
	  m->data_function (m, s);
	  cur_bi = s->current_buffer_index;
	  n_left_b = s->n_buffer_bytes - cur_bi;
	}
    }
  while (n_left_o > 0);

  if (n_left_o > 0 || n_left_b < n_bytes_to_write)
    {
      u8 *r;
      vec_add2 (s->overflow_buffer, r, n_bytes_to_write);
      return r;
    }
  else
    {
      s->current_buffer_index = cur_bi + n_bytes_to_write;
      return s->buffer + cur_bi;
    }
}

static void *
serialize_read_not_inline (serialize_main_header_t * m,
			   serialize_stream_t * s,
			   uword n_bytes_to_read, uword flags)
{
  uword cur_bi, cur_oi, n_left_b, n_left_o, n_left_to_read;

  ASSERT (s->current_buffer_index <= s->n_buffer_bytes);

  cur_bi = s->current_buffer_index;
  cur_oi = s->current_overflow_index;

  n_left_b = s->n_buffer_bytes - cur_bi;
  n_left_o = vec_len (s->overflow_buffer) - cur_oi;

  /* Read from overflow? */
  if (n_left_o >= n_bytes_to_read)
    {
      s->current_overflow_index = cur_oi + n_bytes_to_read;
      return vec_elt_at_index (s->overflow_buffer, cur_oi);
    }

  /* Reset overflow buffer. */
  if (n_left_o == 0 && s->overflow_buffer)
    {
      s->current_overflow_index = 0;
      _vec_len (s->overflow_buffer) = 0;
    }

  n_left_to_read = n_bytes_to_read;
  while (n_left_to_read > 0)
    {
      uword n;

      /* If we don't have enough data between overflow and normal buffer
         call read function. */
      if (n_left_o + n_left_b < n_bytes_to_read)
	{
	  /* Save any left over buffer in overflow vector. */
	  if (n_left_b > 0)
	    {
	      vec_add (s->overflow_buffer, s->buffer + cur_bi, n_left_b);
	      n_left_o += n_left_b;
	      n_left_to_read -= n_left_b;
	      /* Advance buffer to end --- even if
	         SERIALIZE_FLAG_NO_ADVANCE_CURRENT_BUFFER_INDEX is set. */
	      cur_bi = s->n_buffer_bytes;
	      n_left_b = 0;
	    }

	  if (m->data_function)
	    {
	      m->data_function (m, s);
	      cur_bi = s->current_buffer_index;
	      n_left_b = s->n_buffer_bytes - cur_bi;
	    }
	}

      /* For first time through loop return if we have enough data
         in normal buffer and overflow vector is empty. */
      if (n_left_o == 0
	  && n_left_to_read == n_bytes_to_read && n_left_b >= n_left_to_read)
	{
	  s->current_buffer_index = cur_bi + n_bytes_to_read;
	  return s->buffer + cur_bi;
	}

      if (!m->data_function || serialize_stream_is_end_of_stream (s))
	{
	  /* This can happen for a peek at end of file.
	     Pad overflow buffer with 0s. */
	  vec_resize (s->overflow_buffer, n_left_to_read);
	  n_left_o += n_left_to_read;
	  n_left_to_read = 0;
	}
      else
	{
	  /* Copy from buffer to overflow vector. */
	  n = clib_min (n_left_to_read, n_left_b);
	  vec_add (s->overflow_buffer, s->buffer + cur_bi, n);
	  cur_bi += n;
	  n_left_b -= n;
	  n_left_o += n;
	  n_left_to_read -= n;
	}
    }

  s->current_buffer_index = cur_bi;
  s->current_overflow_index = cur_oi + n_bytes_to_read;
  return vec_elt_at_index (s->overflow_buffer, cur_oi);
}

void *
serialize_read_write_not_inline (serialize_main_header_t * m,
				 serialize_stream_t * s,
				 uword n_bytes, uword flags)
{
  return (((flags & SERIALIZE_FLAG_IS_READ) ? serialize_read_not_inline :
	   serialize_write_not_inline) (m, s, n_bytes, flags));
}

static void
serialize_read_write_close (serialize_main_header_t * m,
			    serialize_stream_t * s, uword flags)
{
  if (serialize_stream_is_end_of_stream (s))
    return;

  if (flags & SERIALIZE_FLAG_IS_WRITE)
    /* "Write" 0 bytes to flush overflow vector. */
    serialize_write_not_inline (m, s, /* n bytes */ 0, flags);

  serialize_stream_set_end_of_stream (s);

  /* Call it one last time to flush buffer and close. */
  m->data_function (m, s);

  vec_free (s->overflow_buffer);
}

void
serialize_close (serialize_main_t * m)
{
  serialize_read_write_close (&m->header, &m->stream,
			      SERIALIZE_FLAG_IS_WRITE);
}

void
unserialize_close (serialize_main_t * m)
{
  serialize_read_write_close (&m->header, &m->stream, SERIALIZE_FLAG_IS_READ);
}

void
serialize_open_data (serialize_main_t * m, u8 * data, uword n_data_bytes)
{
  clib_memset (m, 0, sizeof (m[0]));
  m->stream.buffer = data;
  m->stream.n_buffer_bytes = n_data_bytes;
}

void
unserialize_open_data (serialize_main_t * m, u8 * data, uword n_data_bytes)
{
  serialize_open_data (m, data, n_data_bytes);
}

static void
serialize_vector_write (serialize_main_header_t * m, serialize_stream_t * s)
{
  if (!serialize_stream_is_end_of_stream (s))
    {
      /* Double buffer size. */
      uword l = vec_len (s->buffer);
      vec_resize (s->buffer, l > 0 ? l : 64);
      s->n_buffer_bytes = vec_len (s->buffer);
    }
}

void
serialize_open_vector (serialize_main_t * m, u8 * vector)
{
  clib_memset (m, 0, sizeof (m[0]));
  m->header.data_function = serialize_vector_write;
  m->stream.buffer = vector;
  m->stream.current_buffer_index = 0;
  m->stream.n_buffer_bytes = vec_len (vector);
}

void *
serialize_close_vector (serialize_main_t * m)
{
  serialize_stream_t *s = &m->stream;
  void *result;

  serialize_close (m);		/* frees overflow buffer */

  if (s->buffer)
    _vec_len (s->buffer) = s->current_buffer_index;
  result = s->buffer;
  clib_memset (m, 0, sizeof (m[0]));
  return result;
}

void
serialize_multiple_1 (serialize_main_t * m,
		      void *data, uword data_stride, uword n_data)
{
  u8 *d = data;
  u8 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = serialize_get (m, 4 * sizeof (d[0]));
      p[0] = d[0 * data_stride];
      p[1] = d[1 * data_stride];
      p[2] = d[2 * data_stride];
      p[3] = d[3 * data_stride];
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = serialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  p[0] = d[0];
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

void
serialize_multiple_2 (serialize_main_t * m,
		      void *data, uword data_stride, uword n_data)
{
  void *d = data;
  u16 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = serialize_get (m, 4 * sizeof (p[0]));
      clib_mem_unaligned (p + 0, u16) =
	clib_host_to_net_mem_u16 (d + 0 * data_stride);
      clib_mem_unaligned (p + 1, u16) =
	clib_host_to_net_mem_u16 (d + 1 * data_stride);
      clib_mem_unaligned (p + 2, u16) =
	clib_host_to_net_mem_u16 (d + 2 * data_stride);
      clib_mem_unaligned (p + 3, u16) =
	clib_host_to_net_mem_u16 (d + 3 * data_stride);
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = serialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  clib_mem_unaligned (p + 0, u16) =
	    clib_host_to_net_mem_u16 (d + 0 * data_stride);
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

void
serialize_multiple_4 (serialize_main_t * m,
		      void *data, uword data_stride, uword n_data)
{
  void *d = data;
  u32 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = serialize_get (m, 4 * sizeof (p[0]));
      clib_mem_unaligned (p + 0, u32) =
	clib_host_to_net_mem_u32 (d + 0 * data_stride);
      clib_mem_unaligned (p + 1, u32) =
	clib_host_to_net_mem_u32 (d + 1 * data_stride);
      clib_mem_unaligned (p + 2, u32) =
	clib_host_to_net_mem_u32 (d + 2 * data_stride);
      clib_mem_unaligned (p + 3, u32) =
	clib_host_to_net_mem_u32 (d + 3 * data_stride);
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = serialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  clib_mem_unaligned (p + 0, u32) =
	    clib_host_to_net_mem_u32 (d + 0 * data_stride);
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

void
unserialize_multiple_1 (serialize_main_t * m,
			void *data, uword data_stride, uword n_data)
{
  u8 *d = data;
  u8 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = unserialize_get (m, 4 * sizeof (d[0]));
      d[0 * data_stride] = p[0];
      d[1 * data_stride] = p[1];
      d[2 * data_stride] = p[2];
      d[3 * data_stride] = p[3];
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = unserialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  d[0] = p[0];
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

void
unserialize_multiple_2 (serialize_main_t * m,
			void *data, uword data_stride, uword n_data)
{
  void *d = data;
  u16 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = unserialize_get (m, 4 * sizeof (p[0]));
      clib_mem_unaligned (d + 0 * data_stride, u16) =
	clib_net_to_host_mem_u16 (p + 0);
      clib_mem_unaligned (d + 1 * data_stride, u16) =
	clib_net_to_host_mem_u16 (p + 1);
      clib_mem_unaligned (d + 2 * data_stride, u16) =
	clib_net_to_host_mem_u16 (p + 2);
      clib_mem_unaligned (d + 3 * data_stride, u16) =
	clib_net_to_host_mem_u16 (p + 3);
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = unserialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  clib_mem_unaligned (d + 0 * data_stride, u16) =
	    clib_net_to_host_mem_u16 (p + 0);
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

void
unserialize_multiple_4 (serialize_main_t * m,
			void *data, uword data_stride, uword n_data)
{
  void *d = data;
  u32 *p;
  uword n_left = n_data;

  while (n_left >= 4)
    {
      p = unserialize_get (m, 4 * sizeof (p[0]));
      clib_mem_unaligned (d + 0 * data_stride, u32) =
	clib_net_to_host_mem_u32 (p + 0);
      clib_mem_unaligned (d + 1 * data_stride, u32) =
	clib_net_to_host_mem_u32 (p + 1);
      clib_mem_unaligned (d + 2 * data_stride, u32) =
	clib_net_to_host_mem_u32 (p + 2);
      clib_mem_unaligned (d + 3 * data_stride, u32) =
	clib_net_to_host_mem_u32 (p + 3);
      n_left -= 4;
      d += 4 * data_stride;
    }

  if (n_left > 0)
    {
      p = unserialize_get (m, n_left * sizeof (p[0]));
      while (n_left > 0)
	{
	  clib_mem_unaligned (d + 0 * data_stride, u32) =
	    clib_net_to_host_mem_u32 (p + 0);
	  p += 1;
	  d += 1 * data_stride;
	  n_left -= 1;
	}
    }
}

#ifdef CLIB_UNIX

#include <unistd.h>
#include <fcntl.h>

static void
clib_file_write (serialize_main_header_t * m, serialize_stream_t * s)
{
  int fd, n;

  fd = s->data_function_opaque;
  n = write (fd, s->buffer, s->current_buffer_index);
  if (n < 0)
    {
      if (!unix_error_is_fatal (errno))
	n = 0;
      else
	serialize_error (m, clib_error_return_unix (0, "write"));
    }
  if (n == s->current_buffer_index)
    _vec_len (s->buffer) = 0;
  else
    vec_delete (s->buffer, n, 0);
  s->current_buffer_index = vec_len (s->buffer);
}

static void
clib_file_read (serialize_main_header_t * m, serialize_stream_t * s)
{
  int fd, n;

  fd = s->data_function_opaque;
  n = read (fd, s->buffer, vec_len (s->buffer));
  if (n < 0)
    {
      if (!unix_error_is_fatal (errno))
	n = 0;
      else
	serialize_error (m, clib_error_return_unix (0, "read"));
    }
  else if (n == 0)
    serialize_stream_set_end_of_stream (s);
  s->current_buffer_index = 0;
  s->n_buffer_bytes = n;
}

static void
serialize_open_clib_file_descriptor_helper (serialize_main_t * m, int fd,
					    uword is_read)
{
  clib_memset (m, 0, sizeof (m[0]));
  vec_resize (m->stream.buffer, 4096);

  if (!is_read)
    {
      m->stream.n_buffer_bytes = vec_len (m->stream.buffer);
      _vec_len (m->stream.buffer) = 0;
    }

  m->header.data_function = is_read ? clib_file_read : clib_file_write;
  m->stream.data_function_opaque = fd;
}

void
serialize_open_clib_file_descriptor (serialize_main_t * m, int fd)
{
  serialize_open_clib_file_descriptor_helper (m, fd, /* is_read */ 0);
}

void
unserialize_open_clib_file_descriptor (serialize_main_t * m, int fd)
{
  serialize_open_clib_file_descriptor_helper (m, fd, /* is_read */ 1);
}

static clib_error_t *
serialize_open_clib_file_helper (serialize_main_t * m, char *file,
				 uword is_read)
{
  int fd, mode;

  mode = is_read ? O_RDONLY : O_RDWR | O_CREAT | O_TRUNC;
  fd = open (file, mode, 0666);
  if (fd < 0)
    return clib_error_return_unix (0, "open `%s'", file);

  serialize_open_clib_file_descriptor_helper (m, fd, is_read);
  return 0;
}

clib_error_t *
serialize_open_clib_file (serialize_main_t * m, char *file)
{
  return serialize_open_clib_file_helper (m, file, /* is_read */ 0);
}

clib_error_t *
unserialize_open_clib_file (serialize_main_t * m, char *file)
{
  return serialize_open_clib_file_helper (m, file, /* is_read */ 1);
}

#endif /* CLIB_UNIX */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */