forked from Green-Sky/tomato
Green Sky
aae086cc65
b03b571272 fix: flaky tcp test This only fixes the symptoms, not the real problem. Sometimes or consistently on some platforms a socket might need a moment before it can be written to. 32e67ab4c2 cleanup: use typedef for private message ID's in callback 7b1db6adc1 feat: add message IDs to private group messages 99e0bcc27d refactor: Observers/ignored peers can now send and receive custom packets b3c3c49d26 fix: Disable IPv6 in Windows cross-compilation tests e742deddff feat: Check hashes of Windows dependencies when cross-compiling dfb9a0b02b fix: Test the current Windows Dockerfile, not an old Dockerhub image 14de93ccec chore: Use WineHQ's Wine as Debian Bookworm's crashes ed37616249 docs: Update the Windows cross-compilation section 9bb79c174f cleanup: Remove a couple of unnecessary misc_tools dependencies 19475adb70 chore: Statically link OpenMP into the cracker fun util on Windows 1be311e51f feat: Build the fun utils when cross-compiling to Windows 88133f8446 chore: Strip Windows binaries 3cc0ae7535 refactor: Copy over all of the required static dependencies c4fa8f7fb1 feat: Generate .def, .exp and .lib files when building for Windows 74bbac5363 feat: Let CMake create the dll instead of doing so ourselves 246642e9ae feat: Harden Windows cross-compilation 8d431c0d11 chore: Bump Windows build dependency versions e519f7998b fix: Remove unnecessary wsock32 dependency on Windows ed2b60c217 chore: Use a specific non-broken slimcc version. d7f21010a1 chore: Update github actions. e71a68b7f2 docs: Update the list of CMake options 77e08876ff chore: Remove mod and founder from group API naming scheme 12bc042767 docs: add the experimental api build option to INSTALL.md e1fa5cae96 refactor: Rename Queries to Query to align with other enums. be82a3ea30 fix: Correct type for conference offline peer numbers. 0627c36716 test: Add pkgsrc build. 92578afe4b test: Add FreeBSD VM action on GitHub. 52ece0f57b test: Build toxcore on NetBSD (VM). 3fe8ee2c11 chore: Only install tox_private.h on request. 9a8dfa06ab fix: save_compatibility_test failing on big-endian systems 86f5e55578 fix: Don't serve files from websockify. 710eb674a5 fix: Correctly pass extended public keys to group moderation code. 021db7031c refactor: Use `struct`s for extended public/secret keys. a1e999fd80 chore: Compile libsodium reference implementation with compcert. fbe3c19cf5 cleanup: correct a few nullable annotations 623e3ee5c3 cleanup: Don't use `memcpy` to cast arbitrary `struct`s to `uint8_t[]`. c71567dc18 fix: Pass array, not array pointer, to `memcmp`. 9b46a08144 cleanup: Never pass `void*` directly to `memcpy`. 5d7b7a7bbc refactor: Use tox rng to seed the keypair generation. 961891d568 cleanup: Small improvements found by PVS Studio. 8201019f0d chore: Disable NGC saving by default, enable through Tox_Options. 5dd9ee3f65 cleanup: Replace pointer arithmetic with explicit `&arr[i]`. ca4606d49d refactor: Use strong typedef for NGC peer id. 442213b722 cleanup: Simplify custom packet length check in NGC. 08d3393def fix: Correct a few potential null derefs in bootstrap daemon. b9877b32b0 fix: Add missing memunlock of local variable when it goes out of scope. dab5fe44b9 fix: Zero out stack-allocated secret key before return. f058103299 refactor: Make prune_gc_sanctions_list more obviously correct. 3ba7a0dec9 docs: Add static analysis tool list to README. 8d0811a0f3 docs: Run prettier-markdown on markdown files. 969e3a2bfc refactor: Fix network test not using the strong typedef 93c83fbc7c refactor: Use strong typedef instead of struct for `Socket`. 9fe18b176f fix: Fix some false positive from PVS Studio. 7c44379ccb cleanup: Check that WINXP macro exists before comparing it. 5c93231bef refactor: Make tox mutex non-recursive. aacff73939 docs: Fix up doxyfile. d55fc85ff5 docs: Add more documentation to crypto_core. 5bdaaaedb6 refactor: Remove `Tox *` from `tox_dispatch`. e202341e76 refactor: Don't rely on tox_dispatch passing tox in tests. 34df938f52 chore: Use C++ mode for clang-tidy. 8b05296a78 chore: Check that both gtest and gmock exist for tests. 42010660e1 test: Add slimcc compiler compatibility test. b473630321 chore: Add some comments to the astyle config. b7404f24f6 cleanup: Remove implicit bool conversions. 4e2dba4d9f chore: Reformat sources with astyle. 4359e3a6bc chore: Rename C++ headers to .hh suffixes. 0c05566e58 cleanup: Further `#include` cleanups. 8d29935b7a chore: Only check the bootstrap daemon checksum on release. f70e588bc6 cleanup: Add more `const` where possible. 511bfe39c8 cleanup: Use Bazel modules to enforce proper `#include` hygiene. 1710a0d091 refactor: Move pack/unpack `IP_Port` from DHT into network module. a975943564 chore: Really fix coverage docker image build. c08409390f chore: Fix post-submit coverage image. 39aadf8922 fix: Don't use `memcmp` to compare `IP_Port`s. d94246a906 fix: partially fix a bug that prevented group part messages from sending. eeaa039222 chore: Fix rpm build; add a CI check for it. 8328449c1a chore: Speed up docker builds a bit by reducing layer count. d6d67d56f3 cleanup: Add `const` where possible in auto tests. 6aa9e6850d cleanup: Minor cleanup of event unpack code. bdf460a3a9 refactor: Rename `system_{memory,...}` to `os_{memory,...}`. 203e1af81e fix: a few off by one errors in group autotests 5c093c4888 cleanup: Remove all uses of `SIZEOF_VLA`. 662c2140f3 test: Add goblint static analyser. 8f07755834 cleanup: Use `memzero(x, s)` instead of `memset(x, 0, s)`. a7258e40cf cleanup: Use explicit 0 instead of `PACKET_ID_PADDING`. 6370d0f15d cleanup: Expand the `Tox_Options` accessor macros. 14a1a0b9bd cleanup: Remove plan9 support. a05dccad13 test: Add a simple new/delete test for Tox. 1cdcf938b9 cleanup: Add comment after every `#endif`. ba99d4dc4b test: Fix comment I broke in the events test PR. e07248debb refactor: Migrate auto_tests to new events API. bdd42b5452 refactor: Add common msgpack array packer with callback. 3c659f5288 cleanup: Rename group to conference in groupav documentation. 89957be230 cleanup: Ensure handler params are named after callback params. c650d9d345 refactor: Pass `this` pointer as first param to s11n callbacks. e7fb91ddb8 refactor: Allow NULL pointers for byte arrays in events. 5e2c8cabc1 cleanup: make some improvements to group moderation test 259de4867e cleanup: Remove `bin_pack_{new,free}`. 21a8ff5895 cleanup: skip a do_gc iteration before removing peers marked for deletion 16809dc36e feat: Add dht_get_nodes_response event to the events system. git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: b03b5712720de9a9901ea12fd741f177327a7021
387 lines
10 KiB
C
387 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2018 The TokTok team.
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* Copyright © 2013 Tox project.
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*/
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/**
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* LAN discovery implementation.
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*/
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#include "LAN_discovery.h"
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#include <stdlib.h>
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#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
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// The mingw32/64 Windows library warns about including winsock2.h after
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// windows.h even though with the above it's a valid thing to do. So, to make
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// mingw32 headers happy, we include winsock2.h first.
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#include <winsock2.h>
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#include <windows.h>
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#include <ws2tcpip.h>
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#include <iphlpapi.h>
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#endif /* WIN32 */
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#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
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#include <netinet/in.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#endif /* Linux/BSD */
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#ifdef __linux__
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#include <linux/if.h>
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#endif /* Linux */
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#if defined(__FreeBSD__) || defined(__DragonFly__)
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#include <net/if.h>
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#endif /* BSD */
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#include "attributes.h"
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#include "ccompat.h"
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#include "crypto_core.h"
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#include "network.h"
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#define MAX_INTERFACES 16
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struct Broadcast_Info {
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uint32_t count;
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IP ips[MAX_INTERFACES];
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};
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#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
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non_null()
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static Broadcast_Info *fetch_broadcast_info(const Network *ns)
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{
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Broadcast_Info *broadcast = (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
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if (broadcast == nullptr) {
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return nullptr;
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}
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IP_ADAPTER_INFO *adapter_info = (IP_ADAPTER_INFO *)malloc(sizeof(IP_ADAPTER_INFO));
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if (adapter_info == nullptr) {
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free(broadcast);
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return nullptr;
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}
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unsigned long out_buf_len = sizeof(IP_ADAPTER_INFO);
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if (GetAdaptersInfo(adapter_info, &out_buf_len) == ERROR_BUFFER_OVERFLOW) {
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free(adapter_info);
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IP_ADAPTER_INFO *new_adapter_info = (IP_ADAPTER_INFO *)malloc(out_buf_len);
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if (new_adapter_info == nullptr) {
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free(broadcast);
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return nullptr;
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}
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adapter_info = new_adapter_info;
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}
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const int ret = GetAdaptersInfo(adapter_info, &out_buf_len);
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if (ret == NO_ERROR) {
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IP_ADAPTER_INFO *adapter = adapter_info;
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while (adapter != nullptr) {
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IP gateway = {0};
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IP subnet_mask = {0};
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if (addr_parse_ip(adapter->IpAddressList.IpMask.String, &subnet_mask)
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&& addr_parse_ip(adapter->GatewayList.IpAddress.String, &gateway)) {
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if (net_family_is_ipv4(gateway.family) && net_family_is_ipv4(subnet_mask.family)) {
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IP *ip = &broadcast->ips[broadcast->count];
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ip->family = net_family_ipv4();
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const uint32_t gateway_ip = net_ntohl(gateway.ip.v4.uint32);
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const uint32_t subnet_ip = net_ntohl(subnet_mask.ip.v4.uint32);
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const uint32_t broadcast_ip = gateway_ip + ~subnet_ip - 1;
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ip->ip.v4.uint32 = net_htonl(broadcast_ip);
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++broadcast->count;
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if (broadcast->count >= MAX_INTERFACES) {
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break;
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}
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}
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}
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adapter = adapter->Next;
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}
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}
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if (adapter_info != nullptr) {
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free(adapter_info);
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}
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return broadcast;
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}
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#elif !defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && (defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__))
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non_null()
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static Broadcast_Info *fetch_broadcast_info(const Network *ns)
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{
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Broadcast_Info *broadcast = (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
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if (broadcast == nullptr) {
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return nullptr;
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}
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/* Not sure how many platforms this will run on,
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* so it's wrapped in `__linux__` for now.
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* Definitely won't work like this on Windows...
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*/
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const Socket sock = net_socket(ns, net_family_ipv4(), TOX_SOCK_STREAM, 0);
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if (!sock_valid(sock)) {
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free(broadcast);
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return nullptr;
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}
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/* Configure ifconf for the ioctl call. */
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struct ifreq i_faces[MAX_INTERFACES] = {{{0}}};
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struct ifconf ifc;
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ifc.ifc_buf = (char *)i_faces;
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ifc.ifc_len = sizeof(i_faces);
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if (ioctl(net_socket_to_native(sock), SIOCGIFCONF, &ifc) < 0) {
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kill_sock(ns, sock);
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free(broadcast);
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return nullptr;
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}
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/* `ifc.ifc_len` is set by the `ioctl()` to the actual length used.
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* On usage of the complete array the call should be repeated with
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* a larger array, not done (640kB and 16 interfaces shall be
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* enough, for everybody!)
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*/
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const int n = ifc.ifc_len / sizeof(struct ifreq);
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for (int i = 0; i < n; ++i) {
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/* there are interfaces with are incapable of broadcast */
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if (ioctl(net_socket_to_native(sock), SIOCGIFBRDADDR, &i_faces[i]) < 0) {
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continue;
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}
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/* moot check: only AF_INET returned (backwards compat.) */
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if (i_faces[i].ifr_broadaddr.sa_family != AF_INET) {
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continue;
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}
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const struct sockaddr_in *sock4 = (const struct sockaddr_in *)(void *)&i_faces[i].ifr_broadaddr;
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if (broadcast->count >= MAX_INTERFACES) {
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break;
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}
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IP *ip = &broadcast->ips[broadcast->count];
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ip->family = net_family_ipv4();
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ip->ip.v4.uint32 = sock4->sin_addr.s_addr;
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if (ip->ip.v4.uint32 == 0) {
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continue;
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}
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++broadcast->count;
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}
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kill_sock(ns, sock);
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return broadcast;
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}
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#else // TODO(irungentoo): Other platforms?
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non_null()
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static Broadcast_Info *fetch_broadcast_info(const Network *ns)
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{
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return (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
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}
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#endif /* platforms */
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/** @brief Send packet to all IPv4 broadcast addresses
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*
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* @retval true if sent to at least one broadcast target.
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* @retval false on failure to find any valid broadcast target.
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*/
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non_null()
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static bool send_broadcasts(const Networking_Core *net, const Broadcast_Info *broadcast, uint16_t port,
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const uint8_t *data, uint16_t length)
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{
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if (broadcast->count == 0) {
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return false;
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}
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for (uint32_t i = 0; i < broadcast->count; ++i) {
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IP_Port ip_port;
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ip_port.ip = broadcast->ips[i];
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ip_port.port = port;
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sendpacket(net, &ip_port, data, length);
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}
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return true;
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}
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/** Return the broadcast ip. */
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static IP broadcast_ip(Family family_socket, Family family_broadcast)
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{
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IP ip;
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ip_reset(&ip);
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if (net_family_is_ipv6(family_socket)) {
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if (net_family_is_ipv6(family_broadcast)) {
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ip.family = net_family_ipv6();
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/* `FF02::1` is - according to RFC 4291 - multicast all-nodes link-local */
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/* `FE80::*:` MUST be exact, for that we would need to look over all
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* interfaces and check in which status they are */
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ip.ip.v6.uint8[0] = 0xFF;
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ip.ip.v6.uint8[1] = 0x02;
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ip.ip.v6.uint8[15] = 0x01;
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} else if (net_family_is_ipv4(family_broadcast)) {
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ip.family = net_family_ipv6();
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ip.ip.v6 = get_ip6_broadcast();
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}
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} else if (net_family_is_ipv4(family_socket) && net_family_is_ipv4(family_broadcast)) {
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ip.family = net_family_ipv4();
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ip.ip.v4 = get_ip4_broadcast();
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}
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return ip;
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}
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non_null()
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static bool ip4_is_local(const IP4 *ip4)
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{
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/* Loopback. */
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return ip4->uint8[0] == 127;
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}
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/**
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* Is IP a local ip or not.
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*/
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bool ip_is_local(const IP *ip)
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{
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if (net_family_is_ipv4(ip->family)) {
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return ip4_is_local(&ip->ip.v4);
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}
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/* embedded IPv4-in-IPv6 */
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if (ipv6_ipv4_in_v6(&ip->ip.v6)) {
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IP4 ip4;
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ip4.uint32 = ip->ip.v6.uint32[3];
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return ip4_is_local(&ip4);
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}
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/* localhost in IPv6 (::1) */
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return ip->ip.v6.uint64[0] == 0 && ip->ip.v6.uint32[2] == 0 && ip->ip.v6.uint32[3] == net_htonl(1);
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}
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non_null()
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static bool ip4_is_lan(const IP4 *ip4)
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{
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/* 10.0.0.0 to 10.255.255.255 range. */
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if (ip4->uint8[0] == 10) {
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return true;
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}
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/* 172.16.0.0 to 172.31.255.255 range. */
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if (ip4->uint8[0] == 172 && ip4->uint8[1] >= 16 && ip4->uint8[1] <= 31) {
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return true;
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}
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/* 192.168.0.0 to 192.168.255.255 range. */
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if (ip4->uint8[0] == 192 && ip4->uint8[1] == 168) {
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return true;
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}
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/* 169.254.1.0 to 169.254.254.255 range. */
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if (ip4->uint8[0] == 169 && ip4->uint8[1] == 254 && ip4->uint8[2] != 0
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&& ip4->uint8[2] != 255) {
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return true;
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}
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/* RFC 6598: 100.64.0.0 to 100.127.255.255 (100.64.0.0/10)
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* (shared address space to stack another layer of NAT) */
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return (ip4->uint8[0] == 100) && ((ip4->uint8[1] & 0xC0) == 0x40);
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}
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bool ip_is_lan(const IP *ip)
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{
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if (ip_is_local(ip)) {
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return true;
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}
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if (net_family_is_ipv4(ip->family)) {
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return ip4_is_lan(&ip->ip.v4);
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}
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if (net_family_is_ipv6(ip->family)) {
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/* autogenerated for each interface: `FE80::*` (up to `FEBF::*`)
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* `FF02::1` is - according to RFC 4291 - multicast all-nodes link-local */
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if (((ip->ip.v6.uint8[0] == 0xFF) && (ip->ip.v6.uint8[1] < 3) && (ip->ip.v6.uint8[15] == 1)) ||
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((ip->ip.v6.uint8[0] == 0xFE) && ((ip->ip.v6.uint8[1] & 0xC0) == 0x80))) {
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return true;
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}
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/* embedded IPv4-in-IPv6 */
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if (ipv6_ipv4_in_v6(&ip->ip.v6)) {
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IP4 ip4;
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ip4.uint32 = ip->ip.v6.uint32[3];
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return ip4_is_lan(&ip4);
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}
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}
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return false;
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}
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bool lan_discovery_send(const Networking_Core *net, const Broadcast_Info *broadcast, const uint8_t *dht_pk,
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uint16_t port)
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{
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if (broadcast == nullptr) {
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return false;
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}
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uint8_t data[CRYPTO_PUBLIC_KEY_SIZE + 1];
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data[0] = NET_PACKET_LAN_DISCOVERY;
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pk_copy(data + 1, dht_pk);
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send_broadcasts(net, broadcast, port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE);
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bool res = false;
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IP_Port ip_port;
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ip_port.port = port;
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/* IPv6 multicast */
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if (net_family_is_ipv6(net_family(net))) {
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ip_port.ip = broadcast_ip(net_family_ipv6(), net_family_ipv6());
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if (ip_isset(&ip_port.ip) && sendpacket(net, &ip_port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE) > 0) {
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res = true;
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}
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}
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/* IPv4 broadcast (has to be IPv4-in-IPv6 mapping if socket is IPv6 */
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ip_port.ip = broadcast_ip(net_family(net), net_family_ipv4());
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if (ip_isset(&ip_port.ip) && sendpacket(net, &ip_port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE) > 0) {
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res = true;
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}
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return res;
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}
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Broadcast_Info *lan_discovery_init(const Network *ns)
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{
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return fetch_broadcast_info(ns);
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}
|
|
|
|
void lan_discovery_kill(Broadcast_Info *broadcast)
|
|
{
|
|
free(broadcast);
|
|
}
|