From 6b84ec54083da9911f5ad4816d0eb4f4745afad4 Mon Sep 17 00:00:00 2001 From: Jordan Augé Date: Mon, 7 Oct 2019 09:52:33 +0200 Subject: [HICN-298] Release new hICN app for Android MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I43adc62fadf00690b687078d739788dffdc5e566 Signed-off-by: Jordan Augé --- lib/includes/hicn/protocol/tcp.h | 173 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 lib/includes/hicn/protocol/tcp.h (limited to 'lib/includes/hicn/protocol/tcp.h') diff --git a/lib/includes/hicn/protocol/tcp.h b/lib/includes/hicn/protocol/tcp.h new file mode 100644 index 000000000..ded9a06b2 --- /dev/null +++ b/lib/includes/hicn/protocol/tcp.h @@ -0,0 +1,173 @@ +/* + * Copyright (c) 2017-2019 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. + */ + +#ifndef HICN_PROTOCOL_TCP_H +#define HICN_PROTOCOL_TCP_H + +#include "../base.h" +#include "../common.h" +#include "../name.h" + +/* + * The length of the TCP header struct must be 20 bytes. + */ +#define EXPECTED_TCP_HDRLEN 20 + +/* + * NOTE: bitfields are problematic for portability reasons. There are provided + * here for reference and documentation purposes, we might just provide a macro + * to disable and use it instead of __BYTE_ORDER__. + */ +typedef struct +{ + u16 sport; + u16 dport; + union + { + u32 seq; + hicn_name_suffix_t name_suffix; + }; + union + { + u32 seq_ack; + struct + { + hicn_pathlabel_t pathlabel; + u8 pad[3]; + }; + }; + + union + { + struct + { + u8 data_offset_and_reserved; + u8 flags; + }; +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + struct + { + u16 reserved:4; + u16 doff:4; + u16 fin:1; + u16 syn:1; + u16 rst:1; + u16 psh:1; + u16 ack:1; + u16 urg:1; + u16 ece:1; + u16 cwr:1; + }; + struct + { /* __ denotes unchanged bitfields */ + u16 timescale:4; + u16 __doff:4; + u16 __fin:1; + u16 __syn:1; + u16 __rst:1; + u16 sig:1; + u16 __ack:1; + u16 man:1; + u16 id:1; + u16 __cwr:1; + }; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + struct + { + u16 doff:4; + u16 reserved:4; + u16 cwr:1; + u16 ece:1; + u16 urg:1; + u16 ack:1; + u16 psh:1; + u16 rst:1; + u16 syn:1; + u16 fin:1; + }; + struct + { + u16 __doff:4; + u16 timescale:4; + u16 __cwr:1; + u16 id:1 u16 man:1; + u16 __ack:1; + u16 sig:1; + u16 __rst:1; + u16 __syn:1; + u16 __fin:1; + }; +#endif + }; + union + { + u16 window; + u16 ldr; + }; + u16 csum; + union + { + u16 urg_ptr; + u16 lifetime; + }; +} _tcp_header_t; + +#define TCP_HDRLEN sizeof(_tcp_header_t) +static_assert (EXPECTED_TCP_HDRLEN == TCP_HDRLEN, + "Size of TCP struct does not match its expected size."); + +#ifndef HICN_VPP_PLUGIN + +/* TCP flags bit 0 first. */ +#define foreach_tcp_flag \ + _ (FIN) /**< No more data from sender. */ \ + _ (SYN) /**< Synchronize sequence numbers. */ \ + _ (RST) /**< Reset the connection. */ \ + _ (PSH) /**< Push function. */ \ + _ (ACK) /**< Ack field significant. */ \ + _ (URG) /**< Urgent pointer field significant. */ \ + _ (ECE) /**< ECN-echo. Receiver got CE packet */ \ + _ (CWR) /**< Sender reduced congestion window */ + +enum +{ +#define _(f) HICN_TCP_FLAG_BIT_##f, + foreach_tcp_flag +#undef _ + HICN_TCP_N_FLAG_BITS, +}; + +enum +{ +#define _(f) HICN_TCP_FLAG_##f = 1 << HICN_TCP_FLAG_BIT_##f, + foreach_tcp_flag +#undef _ +}; + +#endif /* HICN_VPP_PLUGIN */ + +// get_data_name_suffix +// name->ip4.suffix = h->v4.tcp.seq; + + +#endif /* HICN_PROTOCOL_TCP_H */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg