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authorsrdusr <[email protected]>2024-05-27 22:00:00 +0200
committersrdusr <[email protected]>2024-05-27 22:00:00 +0200
commitb565d7d9c47ca1ec5af0effd828431ee96027d60 (patch)
treefbe0c9c897e78f507443507354d5b1d8fb851099 /include/wireframe/pcapng/writer.hpp
parentfbedc55d5aa861c381701c9f913b34ee7ab57ec4 (diff)
downloadpacketeer-b565d7d9c47ca1ec5af0effd828431ee96027d60.tar.gz
packeteer-b565d7d9c47ca1ec5af0effd828431ee96027d60.zip
Rename project from wireframe to packeteer
Decided on the name after weighing alternatives in NAMES.md: packeteer (packet + -eer, "one who wields packets") fit the project's actual scope better than the wire/frame pun once it had grown into full L2-L7 dissection, reassembly, checksums, privilege dropping, and dual TUI/GUI frontends. No existing packet-capture project uses the name; the one real-world collision (Packeteer, Inc., a networking company acquired and folded into Blue Coat/Symantec by 2008) is long defunct. Mechanical rename throughout: CMake project/target names, the wireframe:: namespace and include/wireframe/ directory (git mv, history preserved), every #include path, CLI/GUI help text, and the project's own working directory. NAMES.md rewritten to record the decision instead of leaving stale self-referential etymology behind from the blind rename pass. Verified after every step: full rebuild (all four targets, no warnings) and the full test suite (128/128 cases, 366/366 assertions) both from a fresh reconfigure and again after the directory move.
Diffstat (limited to 'include/wireframe/pcapng/writer.hpp')
-rw-r--r--include/wireframe/pcapng/writer.hpp94
1 files changed, 0 insertions, 94 deletions
diff --git a/include/wireframe/pcapng/writer.hpp b/include/wireframe/pcapng/writer.hpp
deleted file mode 100644
index 18f6022..0000000
--- a/include/wireframe/pcapng/writer.hpp
+++ /dev/null
@@ -1,94 +0,0 @@
-#pragma once
-
-#include <algorithm>
-#include <cstdint>
-#include <cstdio>
-#include <span>
-#include <vector>
-
-// Minimal pcapng writer: one Section Header Block, one Interface
-// Description Block, then an Enhanced Packet Block per captured packet.
-// Per-block Options are skipped entirely - they're optional in the
-// spec, and a block with none simply omits that section, so this stays
-// a valid, Wireshark-readable file without needing to hand-encode TLVs.
-//
-// Multi-byte fields are written little-endian by hand (matching the
-// 0x1A2B3C4D byte-order magic below) rather than via struct-casting,
-// for the same alignment/UB reasons as the src/wireframe/net decoders.
-namespace wireframe::pcapng {
-
-inline constexpr std::uint32_t kBlockTypeShb = 0x0A0D0D0A;
-inline constexpr std::uint32_t kBlockTypeIdb = 0x00000001;
-inline constexpr std::uint32_t kBlockTypeEpb = 0x00000006;
-inline constexpr std::uint32_t kByteOrderMagic = 0x1A2B3C4D;
-inline constexpr std::uint16_t kLinkTypeEthernet = 1;
-
-class Writer {
-public:
- explicit Writer(std::FILE* file) : file_(file) {}
-
- void write_section_header() {
- std::uint8_t body[16];
- put_u32(body + 0, kByteOrderMagic);
- put_u16(body + 4, 1); // major version
- put_u16(body + 6, 0); // minor version
- put_u64(body + 8, 0xFFFFFFFFFFFFFFFFULL); // section length: unknown
- write_block(kBlockTypeShb, {body, sizeof(body)});
- }
-
- void write_interface_description(std::uint32_t snaplen, std::uint16_t link_type) {
- std::uint8_t body[8];
- put_u16(body + 0, link_type);
- put_u16(body + 2, 0); // reserved
- put_u32(body + 4, snaplen);
- write_block(kBlockTypeIdb, {body, sizeof(body)});
- }
-
- void write_packet(std::uint32_t interface_id, std::uint32_t ts_sec, std::uint32_t ts_usec,
- std::span<const unsigned char> data, std::uint32_t original_len) {
- std::uint64_t ts_us = static_cast<std::uint64_t>(ts_sec) * 1'000'000ULL + ts_usec;
- std::uint32_t ts_high = static_cast<std::uint32_t>(ts_us >> 32);
- std::uint32_t ts_low = static_cast<std::uint32_t>(ts_us & 0xFFFFFFFFULL);
-
- std::size_t padded_len = (data.size() + 3) & ~std::size_t(3);
- std::vector<std::uint8_t> body(20 + padded_len, 0); // tail is padding, stays zero
- put_u32(body.data() + 0, interface_id);
- put_u32(body.data() + 4, ts_high);
- put_u32(body.data() + 8, ts_low);
- put_u32(body.data() + 12, static_cast<std::uint32_t>(data.size()));
- put_u32(body.data() + 16, original_len);
- std::copy(data.begin(), data.end(), body.begin() + 20);
-
- write_block(kBlockTypeEpb, body);
- }
-
-private:
- static void put_u16(std::uint8_t* p, std::uint16_t v) {
- p[0] = static_cast<std::uint8_t>(v & 0xFF);
- p[1] = static_cast<std::uint8_t>((v >> 8) & 0xFF);
- }
-
- static void put_u32(std::uint8_t* p, std::uint32_t v) {
- for (int i = 0; i < 4; ++i) p[i] = static_cast<std::uint8_t>((v >> (8 * i)) & 0xFF);
- }
-
- static void put_u64(std::uint8_t* p, std::uint64_t v) {
- for (int i = 0; i < 8; ++i) p[i] = static_cast<std::uint8_t>((v >> (8 * i)) & 0xFF);
- }
-
- void write_block(std::uint32_t type, std::span<const std::uint8_t> body) {
- std::uint32_t total_len = static_cast<std::uint32_t>(8 + body.size() + 4);
- std::uint8_t type_buf[4];
- std::uint8_t len_buf[4];
- put_u32(type_buf, type);
- put_u32(len_buf, total_len);
- std::fwrite(type_buf, 1, 4, file_);
- std::fwrite(len_buf, 1, 4, file_);
- std::fwrite(body.data(), 1, body.size(), file_);
- std::fwrite(len_buf, 1, 4, file_);
- }
-
- std::FILE* file_;
-};
-
-} // namespace wireframe::pcapng